mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-25 02:31:49 +01:00
reverted generic Makefile, fixed Xscale default value in STRETCH mode, added support for anti-aliasing !
This commit is contained in:
ekeeke31
parent
6d34bb5796
commit
ef3f88e060
23
Makefile
23
Makefile
@ -1,23 +0,0 @@
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.PHONY = all wii gc wii-clean gc-clean wii-run gc-run
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all: wii gc
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clean: wii-clean gc-clean
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wii:
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$(MAKE) -f Makefile.wii
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wii-clean:
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$(MAKE) -f Makefile.wii clean
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wii-run:
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$(MAKE) -f Makefile.wii run
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gc:
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$(MAKE) -f Makefile.gc
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gc-clean:
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$(MAKE) -f Makefile.gc clean
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gc-run:
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$(MAKE) -f Makefile.gc run
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6
compile_all.bat
Normal file
6
compile_all.bat
Normal file
@ -0,0 +1,6 @@
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cp Makefile.gc Makefile
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make
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cp Makefile.wii Makefile
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make
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rm Makefile
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cp genplus_wii.dol boot.dol
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15
history.txt
15
history.txt
@ -15,18 +15,21 @@ CURRENT:
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- improved HBLANK flag accuracy, fixes line flickering in "Gouketsuji Ichizoku"
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- improved HBLANK flag accuracy, fixes line flickering in "Gouketsuji Ichizoku"
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- re-enabled Z80 banked access to WRAM, fixes hang-up in "Mamono Hunter Youko"
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- re-enabled Z80 banked access to WRAM, fixes hang-up in "Mamono Hunter Youko"
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- modified JCART emulation, fixes corrupted tracks logo in "Micro Machines 2"
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- modified JCART emulation, fixes corrupted tracks logo in "Micro Machines 2"
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- added Blargg's NTSC Filters support
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- added Blargg's NTSC Filters support (emulates NTSC composite video artifacts)
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[NGC/Wii]
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[NGC/Wii]
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- remove unused libsamplerate settings in "HQ YM2612" mode
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- remove useless libsamplerate settings in "HQ YM2612" mode, only keeps SRC_LINEAR (faster) and SRC_SINC_FAST (better)
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- implemented menu fast scrolling with the Wiimote D-PAD
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- implemented fast scrolling in menus using Wiimote D-PAD
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- fixed config file incompatibilities between Gamecube and Wii versions
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- fixed config file incompatibilities when switching between Gamecube and Wii versions
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- re-enabled texture filtering in H40 original mode when overscan is emulated: fix screen scroll tearing
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- added an option to enable/disable bilinear filtering (can reduce scroll tearing sometime)
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- added antialiasing support (optional)
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- modified Xscale/Yscale values to show scaled width/height instead of scaling offsets
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- removed embedded font, back to internal IPL font: it should still works for Qoob users (thanks to emukiddid !)
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[NGC]
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[NGC]
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- added proper 480p menu detection for NTSC Gamecube users
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- added proper 480p menu detection for NTSC Gamecube users
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- now prevents FAT automatic operations if no SDCARD is inserted
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- prevents FAT automatic operations if no SDCARD is present
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@ -4,7 +4,7 @@
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#include <fat.h>
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#include <fat.h>
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#include <sys/dir.h>
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#include <sys/dir.h>
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#define CONFIG_VERSION "GENPLUS 1.2.6 "
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#define CONFIG_VERSION "GENPLUS 1.2.7 "
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t_config config;
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t_config config;
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bool use_FAT;
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bool use_FAT;
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@ -90,6 +90,7 @@ void set_config_defaults(void)
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config.render = (vmode->viTVMode == VI_TVMODE_NTSC_PROG) ? 2 : 0;
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config.render = (vmode->viTVMode == VI_TVMODE_NTSC_PROG) ? 2 : 0;
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config.ntsc = 0;
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config.ntsc = 0;
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config.filtering = 1;
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config.filtering = 1;
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config.aa = 0;
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/* controllers options */
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/* controllers options */
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ogc_input__set_defaults();
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ogc_input__set_defaults();
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@ -30,6 +30,7 @@ typedef struct
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uint8 render;
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uint8 render;
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uint8 ntsc;
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uint8 ntsc;
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uint8 filtering;
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uint8 filtering;
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uint8 aa;
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uint16 pad_keymap[4][MAX_KEYS];
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uint16 pad_keymap[4][MAX_KEYS];
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uint32 wpad_keymap[4*3][MAX_KEYS];
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uint32 wpad_keymap[4*3][MAX_KEYS];
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t_input_config input[MAX_DEVICES];
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t_input_config input[MAX_DEVICES];
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@ -314,8 +314,8 @@ void dispmenu ()
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int ret;
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int ret;
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int quit = 0;
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int quit = 0;
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int prevmenu = menu;
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int prevmenu = menu;
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int count = config.aspect ? 8 : 10;
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int count = 11;
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char items[10][25];
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char items[11][25];
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strcpy (menutitle, "Press B to return");
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strcpy (menutitle, "Press B to return");
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menu = 0;
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menu = 0;
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@ -331,16 +331,17 @@ void dispmenu ()
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if (config.tv_mode == 0) sprintf (items[2], "TV Mode: 60HZ");
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if (config.tv_mode == 0) sprintf (items[2], "TV Mode: 60HZ");
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else if (config.tv_mode == 1) sprintf (items[2], "TV Mode: 50HZ");
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else if (config.tv_mode == 1) sprintf (items[2], "TV Mode: 50HZ");
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else sprintf (items[2], "TV Mode: 50/60HZ");
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else sprintf (items[2], "TV Mode: 50/60HZ");
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sprintf (items[3], "GX Filter: %s", config.filtering ? " ON" : "OFF");
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sprintf (items[3], "Anti Aliasing: %s", config.aa ? " ON" : "OFF");
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if (config.ntsc == 1) sprintf (items[4], "NTSC Filter: COMPOSITE");
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sprintf (items[4], "GX Filter: %s", config.filtering ? " ON" : "OFF");
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else if (config.ntsc == 2) sprintf (items[4], "NTSC Filter: S-VIDEO");
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if (config.ntsc == 1) sprintf (items[5], "NTSC Filter: COMPOSITE");
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else if (config.ntsc == 3) sprintf (items[4], "NTSC Filter: RGB");
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else if (config.ntsc == 2) sprintf (items[5], "NTSC Filter: S-VIDEO");
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else sprintf (items[4], "NTSC Filter: OFF");
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else if (config.ntsc == 3) sprintf (items[5], "NTSC Filter: RGB");
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sprintf (items[5], "Borders: %s", config.overscan ? " ON" : "OFF");
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else sprintf (items[5], "NTSC Filter: OFF");
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sprintf (items[6], "Center X: %s%02d", config.xshift < 0 ? "-":"+", abs(config.xshift));
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sprintf (items[6], "Borders: %s", config.overscan ? " ON" : "OFF");
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sprintf (items[7], "Center Y: %s%02d", config.yshift < 0 ? "-":"+", abs(config.yshift));
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sprintf (items[7], "Center X: %s%02d", config.xshift < 0 ? "-":"+", abs(config.xshift));
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sprintf (items[8], "Scale X: %02d", xscale*2);
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sprintf (items[8], "Center Y: %s%02d", config.yshift < 0 ? "-":"+", abs(config.yshift));
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sprintf (items[9], "Scale Y: %02d", yscale*2);
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sprintf (items[9], "Scale X: %02d", xscale*2);
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sprintf (items[10], "Scale Y: %02d", yscale*2);
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ret = domenu (&items[0], count, 1);
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ret = domenu (&items[0], count, 1);
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@ -348,7 +349,6 @@ void dispmenu ()
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{
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{
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case 0: /*** config.aspect ratio ***/
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case 0: /*** config.aspect ratio ***/
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config.aspect ^= 1;
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config.aspect ^= 1;
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count = config.aspect ? 8 : 10;
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bitmap.viewport.changed = 1;
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bitmap.viewport.changed = 1;
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break;
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break;
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@ -360,7 +360,6 @@ void dispmenu ()
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{
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{
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/* progressive mode (60hz only) */
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/* progressive mode (60hz only) */
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config.tv_mode = 0;
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config.tv_mode = 0;
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gc_pal = 0;
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}
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}
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else
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else
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{
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{
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@ -376,44 +375,50 @@ void dispmenu ()
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config.tv_mode = (config.tv_mode + 1) % 3;
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config.tv_mode = (config.tv_mode + 1) % 3;
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break;
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break;
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case 3: /*** texture filtering ***/
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case 3: /*** antialiasing ***/
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config.aa ^= 1;
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break;
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case 4: /*** bilinear filtering ***/
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config.filtering ^= 1;
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config.filtering ^= 1;
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bitmap.viewport.changed = 1;
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bitmap.viewport.changed = 1;
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break;
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break;
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case 4: /*** NTSC filter ***/
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case 5: /*** NTSC filter ***/
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config.ntsc ++;
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config.ntsc ++;
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if (config.ntsc > 3) config.ntsc = 0;
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if (config.ntsc > 3) config.ntsc = 0;
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bitmap.viewport.changed = 1;
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bitmap.viewport.changed = 1;
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break;
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break;
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case 5: /*** overscan emulation ***/
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case 6: /*** overscan emulation ***/
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config.overscan ^= 1;
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config.overscan ^= 1;
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bitmap.viewport.x = config.overscan ? ((reg[12] & 1) ? 16 : 12) : 0;
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bitmap.viewport.x = config.overscan ? ((reg[12] & 1) ? 16 : 12) : 0;
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bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
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bitmap.viewport.y = config.overscan ? (((reg[1] & 8) ? 0 : 8) + (vdp_pal ? 24 : 0)) : 0;
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bitmap.viewport.changed = 1;
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bitmap.viewport.changed = 1;
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break;
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break;
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case 6: /*** Center X ***/
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case 7: /*** Center X ***/
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case -8:
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case -9:
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if (ret<0) config.xshift --;
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if (ret<0) config.xshift --;
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else config.xshift ++;
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else config.xshift ++;
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break;
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break;
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case 7: /*** Center Y ***/
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case 8: /*** Center Y ***/
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case -9:
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case -10:
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if (ret<0) config.yshift --;
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if (ret<0) config.yshift --;
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else config.yshift ++;
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else config.yshift ++;
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break;
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break;
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case 8: /*** Scale X ***/
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case 9: /*** Scale X ***/
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case -10:
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case -11:
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if (config.aspect) break;
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if (ret<0) config.xscale --;
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if (ret<0) config.xscale --;
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else config.xscale ++;
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else config.xscale ++;
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break;
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break;
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case 9: /*** Scale Y ***/
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case 10: /*** Scale Y ***/
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case -11:
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case -12:
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if (config.aspect) break;
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if (ret<0) config.yscale --;
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if (ret<0) config.yscale --;
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else config.yscale ++;
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else config.yscale ++;
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break;
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break;
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@ -72,10 +72,10 @@ GXRModeObj TV50hz_288p =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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@ -107,10 +107,10 @@ GXRModeObj TV50hz_288i =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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@ -142,21 +142,21 @@ GXRModeObj TV50hz_576i =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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{
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{
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4, // line n-1
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8, // line n-1
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8, // line n-1
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8, // line n-1
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10, // line n
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12, // line n
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12, // line n
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10, // line n
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16, // line n
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12, // line n
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8, // line n+1
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8, // line n+1
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8 // line n+1
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4 // line n+1
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}
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}
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};
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};
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@ -177,10 +177,10 @@ GXRModeObj TV60hz_240p =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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@ -212,10 +212,10 @@ GXRModeObj TV60hz_240i =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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@ -247,21 +247,21 @@ GXRModeObj TV60hz_480i =
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// sample points arranged in increasing Y order
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// sample points arranged in increasing Y order
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{
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{
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{6,6},{6,6},{6,6}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{3,2},{9,6},{3,10}, // pix 0, 3 sample points, 1/12 units, 4 bits each
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{6,6},{6,6},{6,6}, // pix 1
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{3,2},{9,6},{3,10}, // pix 1
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{6,6},{6,6},{6,6}, // pix 2
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{9,2},{3,6},{9,10}, // pix 2
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{6,6},{6,6},{6,6} // pix 3
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{9,2},{3,6},{9,10} // pix 3
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},
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},
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// vertical filter[7], 1/64 units, 6 bits each
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// vertical filter[7], 1/64 units, 6 bits each
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{
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{
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4, // line n-1
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8, // line n-1
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8, // line n-1
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8, // line n-1
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10, // line n
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12, // line n
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12, // line n
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10, // line n
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16, // line n
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12, // line n
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8, // line n+1
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8, // line n+1
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8 // line n+1
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4 // line n+1
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}
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}
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};
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};
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@ -406,7 +406,7 @@ void ogc_video__scale(void)
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else
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else
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{
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{
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/* fullscreen stretch */
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/* fullscreen stretch */
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xscale = bitmap.viewport.w + 2*bitmap.viewport.x;
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xscale = 352;
|
||||||
yscale = (gc_pal && !config.render) ? (vdp_pal ? (268*144 / bitmap.viewport.h):143) : (vdp_pal ? (224*144 / bitmap.viewport.h):120);
|
yscale = (gc_pal && !config.render) ? (vdp_pal ? (268*144 / bitmap.viewport.h):143) : (vdp_pal ? (224*144 / bitmap.viewport.h):120);
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -469,9 +469,14 @@ void ogc_video__scale(void)
|
|||||||
square[0] = square[9] = -scale + xshift;
|
square[0] = square[9] = -scale + xshift;
|
||||||
|
|
||||||
/* vertical scaling */
|
/* vertical scaling */
|
||||||
scale = yscale;
|
scale = yscale + yshift;
|
||||||
square[4] = square[1] = (scale + yshift) * (config.render ? 2:1);
|
if (config.render && !config.aa)
|
||||||
square[7] = square[10] = (yshift - scale) * (config.render ? 2:1);
|
{
|
||||||
|
scale *= 2;
|
||||||
|
yshift *= 2;
|
||||||
|
}
|
||||||
|
square[4] = square[1] = scale + yshift;
|
||||||
|
square[7] = square[10] = yshift - scale;
|
||||||
|
|
||||||
/* update position matrix */
|
/* update position matrix */
|
||||||
draw_init();
|
draw_init();
|
||||||
@ -504,6 +509,11 @@ void ogc_video__reset()
|
|||||||
if (config.render) rmode = tvmodes[gc_pal*3 + 2];
|
if (config.render) rmode = tvmodes[gc_pal*3 + 2];
|
||||||
else rmode = tvmodes[gc_pal*3 + interlaced];
|
else rmode = tvmodes[gc_pal*3 + interlaced];
|
||||||
|
|
||||||
|
/* anti-aliasing */
|
||||||
|
rmode->aa = config.aa;
|
||||||
|
if (config.render) rmode->efbHeight = config.aa ? 242 : 480;
|
||||||
|
else if (gc_pal) rmode->efbHeight = config.aa ? 264 : 286;
|
||||||
|
|
||||||
VIDEO_Configure (rmode);
|
VIDEO_Configure (rmode);
|
||||||
VIDEO_ClearFrameBuffer(rmode, xfb[whichfb], COLOR_BLACK);
|
VIDEO_ClearFrameBuffer(rmode, xfb[whichfb], COLOR_BLACK);
|
||||||
VIDEO_Flush();
|
VIDEO_Flush();
|
||||||
@ -521,7 +531,7 @@ void ogc_video__reset()
|
|||||||
GX_SetDispCopyDst (rmode->fbWidth, xfbHeight);
|
GX_SetDispCopyDst (rmode->fbWidth, xfbHeight);
|
||||||
GX_SetCopyFilter (rmode->aa, rmode->sample_pattern, config.render ? GX_TRUE : GX_FALSE, rmode->vfilter);
|
GX_SetCopyFilter (rmode->aa, rmode->sample_pattern, config.render ? GX_TRUE : GX_FALSE, rmode->vfilter);
|
||||||
GX_SetFieldMode (rmode->field_rendering, ((rmode->viHeight == 2 * rmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
|
GX_SetFieldMode (rmode->field_rendering, ((rmode->viHeight == 2 * rmode->xfbHeight) ? GX_ENABLE : GX_DISABLE));
|
||||||
GX_SetPixelFmt (GX_PF_RGB8_Z24, GX_ZC_LINEAR);
|
GX_SetPixelFmt (rmode->aa ? GX_PF_RGB565_Z16 : GX_PF_RGB8_Z24, GX_ZC_LINEAR);
|
||||||
guOrtho(p, rmode->efbHeight/2, -(rmode->efbHeight/2), -(rmode->fbWidth/2), rmode->fbWidth/2, 100, 1000);
|
guOrtho(p, rmode->efbHeight/2, -(rmode->efbHeight/2), -(rmode->fbWidth/2), rmode->fbWidth/2, 100, 1000);
|
||||||
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
|
GX_LoadProjectionMtx (p, GX_ORTHOGRAPHIC);
|
||||||
|
|
||||||
|
|||||||
1
source/sound/SRC/AUTHORS
Normal file
1
source/sound/SRC/AUTHORS
Normal file
@ -0,0 +1 @@
|
|||||||
|
Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
340
source/sound/SRC/COPYING
Normal file
340
source/sound/SRC/COPYING
Normal file
@ -0,0 +1,340 @@
|
|||||||
|
GNU GENERAL PUBLIC LICENSE
|
||||||
|
Version 2, June 1991
|
||||||
|
|
||||||
|
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
|
||||||
|
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
Everyone is permitted to copy and distribute verbatim copies
|
||||||
|
of this license document, but changing it is not allowed.
|
||||||
|
|
||||||
|
Preamble
|
||||||
|
|
||||||
|
The licenses for most software are designed to take away your
|
||||||
|
freedom to share and change it. By contrast, the GNU General Public
|
||||||
|
License is intended to guarantee your freedom to share and change free
|
||||||
|
software--to make sure the software is free for all its users. This
|
||||||
|
General Public License applies to most of the Free Software
|
||||||
|
Foundation's software and to any other program whose authors commit to
|
||||||
|
using it. (Some other Free Software Foundation software is covered by
|
||||||
|
the GNU Library General Public License instead.) You can apply it to
|
||||||
|
your programs, too.
|
||||||
|
|
||||||
|
When we speak of free software, we are referring to freedom, not
|
||||||
|
price. Our General Public Licenses are designed to make sure that you
|
||||||
|
have the freedom to distribute copies of free software (and charge for
|
||||||
|
this service if you wish), that you receive source code or can get it
|
||||||
|
if you want it, that you can change the software or use pieces of it
|
||||||
|
in new free programs; and that you know you can do these things.
|
||||||
|
|
||||||
|
To protect your rights, we need to make restrictions that forbid
|
||||||
|
anyone to deny you these rights or to ask you to surrender the rights.
|
||||||
|
These restrictions translate to certain responsibilities for you if you
|
||||||
|
distribute copies of the software, or if you modify it.
|
||||||
|
|
||||||
|
For example, if you distribute copies of such a program, whether
|
||||||
|
gratis or for a fee, you must give the recipients all the rights that
|
||||||
|
you have. You must make sure that they, too, receive or can get the
|
||||||
|
source code. And you must show them these terms so they know their
|
||||||
|
rights.
|
||||||
|
|
||||||
|
We protect your rights with two steps: (1) copyright the software, and
|
||||||
|
(2) offer you this license which gives you legal permission to copy,
|
||||||
|
distribute and/or modify the software.
|
||||||
|
|
||||||
|
Also, for each author's protection and ours, we want to make certain
|
||||||
|
that everyone understands that there is no warranty for this free
|
||||||
|
software. If the software is modified by someone else and passed on, we
|
||||||
|
want its recipients to know that what they have is not the original, so
|
||||||
|
that any problems introduced by others will not reflect on the original
|
||||||
|
authors' reputations.
|
||||||
|
|
||||||
|
Finally, any free program is threatened constantly by software
|
||||||
|
patents. We wish to avoid the danger that redistributors of a free
|
||||||
|
program will individually obtain patent licenses, in effect making the
|
||||||
|
program proprietary. To prevent this, we have made it clear that any
|
||||||
|
patent must be licensed for everyone's free use or not licensed at all.
|
||||||
|
|
||||||
|
The precise terms and conditions for copying, distribution and
|
||||||
|
modification follow.
|
||||||
|
|
||||||
|
GNU GENERAL PUBLIC LICENSE
|
||||||
|
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
|
||||||
|
|
||||||
|
0. This License applies to any program or other work which contains
|
||||||
|
a notice placed by the copyright holder saying it may be distributed
|
||||||
|
under the terms of this General Public License. The "Program", below,
|
||||||
|
refers to any such program or work, and a "work based on the Program"
|
||||||
|
means either the Program or any derivative work under copyright law:
|
||||||
|
that is to say, a work containing the Program or a portion of it,
|
||||||
|
either verbatim or with modifications and/or translated into another
|
||||||
|
language. (Hereinafter, translation is included without limitation in
|
||||||
|
the term "modification".) Each licensee is addressed as "you".
|
||||||
|
|
||||||
|
Activities other than copying, distribution and modification are not
|
||||||
|
covered by this License; they are outside its scope. The act of
|
||||||
|
running the Program is not restricted, and the output from the Program
|
||||||
|
is covered only if its contents constitute a work based on the
|
||||||
|
Program (independent of having been made by running the Program).
|
||||||
|
Whether that is true depends on what the Program does.
|
||||||
|
|
||||||
|
1. You may copy and distribute verbatim copies of the Program's
|
||||||
|
source code as you receive it, in any medium, provided that you
|
||||||
|
conspicuously and appropriately publish on each copy an appropriate
|
||||||
|
copyright notice and disclaimer of warranty; keep intact all the
|
||||||
|
notices that refer to this License and to the absence of any warranty;
|
||||||
|
and give any other recipients of the Program a copy of this License
|
||||||
|
along with the Program.
|
||||||
|
|
||||||
|
You may charge a fee for the physical act of transferring a copy, and
|
||||||
|
you may at your option offer warranty protection in exchange for a fee.
|
||||||
|
|
||||||
|
2. You may modify your copy or copies of the Program or any portion
|
||||||
|
of it, thus forming a work based on the Program, and copy and
|
||||||
|
distribute such modifications or work under the terms of Section 1
|
||||||
|
above, provided that you also meet all of these conditions:
|
||||||
|
|
||||||
|
a) You must cause the modified files to carry prominent notices
|
||||||
|
stating that you changed the files and the date of any change.
|
||||||
|
|
||||||
|
b) You must cause any work that you distribute or publish, that in
|
||||||
|
whole or in part contains or is derived from the Program or any
|
||||||
|
part thereof, to be licensed as a whole at no charge to all third
|
||||||
|
parties under the terms of this License.
|
||||||
|
|
||||||
|
c) If the modified program normally reads commands interactively
|
||||||
|
when run, you must cause it, when started running for such
|
||||||
|
interactive use in the most ordinary way, to print or display an
|
||||||
|
announcement including an appropriate copyright notice and a
|
||||||
|
notice that there is no warranty (or else, saying that you provide
|
||||||
|
a warranty) and that users may redistribute the program under
|
||||||
|
these conditions, and telling the user how to view a copy of this
|
||||||
|
License. (Exception: if the Program itself is interactive but
|
||||||
|
does not normally print such an announcement, your work based on
|
||||||
|
the Program is not required to print an announcement.)
|
||||||
|
|
||||||
|
These requirements apply to the modified work as a whole. If
|
||||||
|
identifiable sections of that work are not derived from the Program,
|
||||||
|
and can be reasonably considered independent and separate works in
|
||||||
|
themselves, then this License, and its terms, do not apply to those
|
||||||
|
sections when you distribute them as separate works. But when you
|
||||||
|
distribute the same sections as part of a whole which is a work based
|
||||||
|
on the Program, the distribution of the whole must be on the terms of
|
||||||
|
this License, whose permissions for other licensees extend to the
|
||||||
|
entire whole, and thus to each and every part regardless of who wrote it.
|
||||||
|
|
||||||
|
Thus, it is not the intent of this section to claim rights or contest
|
||||||
|
your rights to work written entirely by you; rather, the intent is to
|
||||||
|
exercise the right to control the distribution of derivative or
|
||||||
|
collective works based on the Program.
|
||||||
|
|
||||||
|
In addition, mere aggregation of another work not based on the Program
|
||||||
|
with the Program (or with a work based on the Program) on a volume of
|
||||||
|
a storage or distribution medium does not bring the other work under
|
||||||
|
the scope of this License.
|
||||||
|
|
||||||
|
3. You may copy and distribute the Program (or a work based on it,
|
||||||
|
under Section 2) in object code or executable form under the terms of
|
||||||
|
Sections 1 and 2 above provided that you also do one of the following:
|
||||||
|
|
||||||
|
a) Accompany it with the complete corresponding machine-readable
|
||||||
|
source code, which must be distributed under the terms of Sections
|
||||||
|
1 and 2 above on a medium customarily used for software interchange; or,
|
||||||
|
|
||||||
|
b) Accompany it with a written offer, valid for at least three
|
||||||
|
years, to give any third party, for a charge no more than your
|
||||||
|
cost of physically performing source distribution, a complete
|
||||||
|
machine-readable copy of the corresponding source code, to be
|
||||||
|
distributed under the terms of Sections 1 and 2 above on a medium
|
||||||
|
customarily used for software interchange; or,
|
||||||
|
|
||||||
|
c) Accompany it with the information you received as to the offer
|
||||||
|
to distribute corresponding source code. (This alternative is
|
||||||
|
allowed only for noncommercial distribution and only if you
|
||||||
|
received the program in object code or executable form with such
|
||||||
|
an offer, in accord with Subsection b above.)
|
||||||
|
|
||||||
|
The source code for a work means the preferred form of the work for
|
||||||
|
making modifications to it. For an executable work, complete source
|
||||||
|
code means all the source code for all modules it contains, plus any
|
||||||
|
associated interface definition files, plus the scripts used to
|
||||||
|
control compilation and installation of the executable. However, as a
|
||||||
|
special exception, the source code distributed need not include
|
||||||
|
anything that is normally distributed (in either source or binary
|
||||||
|
form) with the major components (compiler, kernel, and so on) of the
|
||||||
|
operating system on which the executable runs, unless that component
|
||||||
|
itself accompanies the executable.
|
||||||
|
|
||||||
|
If distribution of executable or object code is made by offering
|
||||||
|
access to copy from a designated place, then offering equivalent
|
||||||
|
access to copy the source code from the same place counts as
|
||||||
|
distribution of the source code, even though third parties are not
|
||||||
|
compelled to copy the source along with the object code.
|
||||||
|
|
||||||
|
4. You may not copy, modify, sublicense, or distribute the Program
|
||||||
|
except as expressly provided under this License. Any attempt
|
||||||
|
otherwise to copy, modify, sublicense or distribute the Program is
|
||||||
|
void, and will automatically terminate your rights under this License.
|
||||||
|
However, parties who have received copies, or rights, from you under
|
||||||
|
this License will not have their licenses terminated so long as such
|
||||||
|
parties remain in full compliance.
|
||||||
|
|
||||||
|
5. You are not required to accept this License, since you have not
|
||||||
|
signed it. However, nothing else grants you permission to modify or
|
||||||
|
distribute the Program or its derivative works. These actions are
|
||||||
|
prohibited by law if you do not accept this License. Therefore, by
|
||||||
|
modifying or distributing the Program (or any work based on the
|
||||||
|
Program), you indicate your acceptance of this License to do so, and
|
||||||
|
all its terms and conditions for copying, distributing or modifying
|
||||||
|
the Program or works based on it.
|
||||||
|
|
||||||
|
6. Each time you redistribute the Program (or any work based on the
|
||||||
|
Program), the recipient automatically receives a license from the
|
||||||
|
original licensor to copy, distribute or modify the Program subject to
|
||||||
|
these terms and conditions. You may not impose any further
|
||||||
|
restrictions on the recipients' exercise of the rights granted herein.
|
||||||
|
You are not responsible for enforcing compliance by third parties to
|
||||||
|
this License.
|
||||||
|
|
||||||
|
7. If, as a consequence of a court judgment or allegation of patent
|
||||||
|
infringement or for any other reason (not limited to patent issues),
|
||||||
|
conditions are imposed on you (whether by court order, agreement or
|
||||||
|
otherwise) that contradict the conditions of this License, they do not
|
||||||
|
excuse you from the conditions of this License. If you cannot
|
||||||
|
distribute so as to satisfy simultaneously your obligations under this
|
||||||
|
License and any other pertinent obligations, then as a consequence you
|
||||||
|
may not distribute the Program at all. For example, if a patent
|
||||||
|
license would not permit royalty-free redistribution of the Program by
|
||||||
|
all those who receive copies directly or indirectly through you, then
|
||||||
|
the only way you could satisfy both it and this License would be to
|
||||||
|
refrain entirely from distribution of the Program.
|
||||||
|
|
||||||
|
If any portion of this section is held invalid or unenforceable under
|
||||||
|
any particular circumstance, the balance of the section is intended to
|
||||||
|
apply and the section as a whole is intended to apply in other
|
||||||
|
circumstances.
|
||||||
|
|
||||||
|
It is not the purpose of this section to induce you to infringe any
|
||||||
|
patents or other property right claims or to contest validity of any
|
||||||
|
such claims; this section has the sole purpose of protecting the
|
||||||
|
integrity of the free software distribution system, which is
|
||||||
|
implemented by public license practices. Many people have made
|
||||||
|
generous contributions to the wide range of software distributed
|
||||||
|
through that system in reliance on consistent application of that
|
||||||
|
system; it is up to the author/donor to decide if he or she is willing
|
||||||
|
to distribute software through any other system and a licensee cannot
|
||||||
|
impose that choice.
|
||||||
|
|
||||||
|
This section is intended to make thoroughly clear what is believed to
|
||||||
|
be a consequence of the rest of this License.
|
||||||
|
|
||||||
|
8. If the distribution and/or use of the Program is restricted in
|
||||||
|
certain countries either by patents or by copyrighted interfaces, the
|
||||||
|
original copyright holder who places the Program under this License
|
||||||
|
may add an explicit geographical distribution limitation excluding
|
||||||
|
those countries, so that distribution is permitted only in or among
|
||||||
|
countries not thus excluded. In such case, this License incorporates
|
||||||
|
the limitation as if written in the body of this License.
|
||||||
|
|
||||||
|
9. The Free Software Foundation may publish revised and/or new versions
|
||||||
|
of the General Public License from time to time. Such new versions will
|
||||||
|
be similar in spirit to the present version, but may differ in detail to
|
||||||
|
address new problems or concerns.
|
||||||
|
|
||||||
|
Each version is given a distinguishing version number. If the Program
|
||||||
|
specifies a version number of this License which applies to it and "any
|
||||||
|
later version", you have the option of following the terms and conditions
|
||||||
|
either of that version or of any later version published by the Free
|
||||||
|
Software Foundation. If the Program does not specify a version number of
|
||||||
|
this License, you may choose any version ever published by the Free Software
|
||||||
|
Foundation.
|
||||||
|
|
||||||
|
10. If you wish to incorporate parts of the Program into other free
|
||||||
|
programs whose distribution conditions are different, write to the author
|
||||||
|
to ask for permission. For software which is copyrighted by the Free
|
||||||
|
Software Foundation, write to the Free Software Foundation; we sometimes
|
||||||
|
make exceptions for this. Our decision will be guided by the two goals
|
||||||
|
of preserving the free status of all derivatives of our free software and
|
||||||
|
of promoting the sharing and reuse of software generally.
|
||||||
|
|
||||||
|
NO WARRANTY
|
||||||
|
|
||||||
|
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
|
||||||
|
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
|
||||||
|
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
|
||||||
|
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
|
||||||
|
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
||||||
|
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS
|
||||||
|
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
|
||||||
|
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
|
||||||
|
REPAIR OR CORRECTION.
|
||||||
|
|
||||||
|
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||||
|
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
|
||||||
|
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
|
||||||
|
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
|
||||||
|
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
|
||||||
|
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
|
||||||
|
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
|
||||||
|
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
|
||||||
|
POSSIBILITY OF SUCH DAMAGES.
|
||||||
|
|
||||||
|
END OF TERMS AND CONDITIONS
|
||||||
|
|
||||||
|
How to Apply These Terms to Your New Programs
|
||||||
|
|
||||||
|
If you develop a new program, and you want it to be of the greatest
|
||||||
|
possible use to the public, the best way to achieve this is to make it
|
||||||
|
free software which everyone can redistribute and change under these terms.
|
||||||
|
|
||||||
|
To do so, attach the following notices to the program. It is safest
|
||||||
|
to attach them to the start of each source file to most effectively
|
||||||
|
convey the exclusion of warranty; and each file should have at least
|
||||||
|
the "copyright" line and a pointer to where the full notice is found.
|
||||||
|
|
||||||
|
<one line to give the program's name and a brief idea of what it does.>
|
||||||
|
Copyright (C) <year> <name of author>
|
||||||
|
|
||||||
|
This program is free software; you can redistribute it and/or modify
|
||||||
|
it under the terms of the GNU General Public License as published by
|
||||||
|
the Free Software Foundation; either version 2 of the License, or
|
||||||
|
(at your option) any later version.
|
||||||
|
|
||||||
|
This program is distributed in the hope that it will be useful,
|
||||||
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
GNU General Public License for more details.
|
||||||
|
|
||||||
|
You should have received a copy of the GNU General Public License
|
||||||
|
along with this program; if not, write to the Free Software
|
||||||
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||||
|
|
||||||
|
|
||||||
|
Also add information on how to contact you by electronic and paper mail.
|
||||||
|
|
||||||
|
If the program is interactive, make it output a short notice like this
|
||||||
|
when it starts in an interactive mode:
|
||||||
|
|
||||||
|
Gnomovision version 69, Copyright (C) year name of author
|
||||||
|
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
|
||||||
|
This is free software, and you are welcome to redistribute it
|
||||||
|
under certain conditions; type `show c' for details.
|
||||||
|
|
||||||
|
The hypothetical commands `show w' and `show c' should show the appropriate
|
||||||
|
parts of the General Public License. Of course, the commands you use may
|
||||||
|
be called something other than `show w' and `show c'; they could even be
|
||||||
|
mouse-clicks or menu items--whatever suits your program.
|
||||||
|
|
||||||
|
You should also get your employer (if you work as a programmer) or your
|
||||||
|
school, if any, to sign a "copyright disclaimer" for the program, if
|
||||||
|
necessary. Here is a sample; alter the names:
|
||||||
|
|
||||||
|
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
|
||||||
|
`Gnomovision' (which makes passes at compilers) written by James Hacker.
|
||||||
|
|
||||||
|
<signature of Ty Coon>, 1 April 1989
|
||||||
|
Ty Coon, President of Vice
|
||||||
|
|
||||||
|
This General Public License does not permit incorporating your program into
|
||||||
|
proprietary programs. If your program is a subroutine library, you may
|
||||||
|
consider it more useful to permit linking proprietary applications with the
|
||||||
|
library. If this is what you want to do, use the GNU Library General
|
||||||
|
Public License instead of this License.
|
||||||
23
source/sound/SRC/NEWS
Normal file
23
source/sound/SRC/NEWS
Normal file
@ -0,0 +1,23 @@
|
|||||||
|
Version 0.1.4 (2008-07-02)
|
||||||
|
* Fix bug which causes a segfault with extremely low conversion ratios.
|
||||||
|
|
||||||
|
Version 0.1.3 (2008-03-23)
|
||||||
|
* Huge improvement to the quality of conversion with the
|
||||||
|
SRC_SINC_MEDIUM_QUALITY and SRC_SINC_BEST_QUALITY converters.
|
||||||
|
* Minor bug fixes.
|
||||||
|
|
||||||
|
Version 0.1.2 (2004-09-12)
|
||||||
|
* Fixed where callback based API wasn't being reset properly.
|
||||||
|
* Minor bug fixes.
|
||||||
|
|
||||||
|
Version 0.1.1 (2004-07-17)
|
||||||
|
* Fixed bug in callback based API.
|
||||||
|
* Fixed a bug brought to light by aggressive optimisations of gcc-3.4.
|
||||||
|
* Minor bug fixes.
|
||||||
|
|
||||||
|
Version 0.1.0 (2004-03-14)
|
||||||
|
* Added callback based API.
|
||||||
|
* Added a pair of functions for doing short to float and float to short
|
||||||
|
conversions on an arrays of data.
|
||||||
|
* Many minor bug fixes.
|
||||||
|
|
||||||
50
source/sound/SRC/README
Normal file
50
source/sound/SRC/README
Normal file
@ -0,0 +1,50 @@
|
|||||||
|
This is libsamplerate, 0.1.4
|
||||||
|
|
||||||
|
libsamplerate (also known as Secret Rabbit Code) is a library for
|
||||||
|
perfroming sample rate conversion of audio data.
|
||||||
|
|
||||||
|
The src/ directory contains the source code for library itself.
|
||||||
|
|
||||||
|
The doc/ directory contains the libsamplerate documentation.
|
||||||
|
|
||||||
|
The examples/ directory contains examples of how to write code using
|
||||||
|
libsamplerate.
|
||||||
|
|
||||||
|
The tests/ directory contains programs which link against
|
||||||
|
libsamplerate and test its functionality.
|
||||||
|
|
||||||
|
The Win32/ directory contains files and documentation to allow
|
||||||
|
libsamplerate to compile under Win32 with the Microsoft Visual C++
|
||||||
|
compiler.
|
||||||
|
|
||||||
|
Win32
|
||||||
|
-----
|
||||||
|
There are detailed instructions for building libsamplerate on Win32
|
||||||
|
in the file
|
||||||
|
|
||||||
|
doc/win32.html
|
||||||
|
|
||||||
|
|
||||||
|
MacOSX
|
||||||
|
------
|
||||||
|
Building on MacOSX should be the same as building it on any other
|
||||||
|
Unix.
|
||||||
|
|
||||||
|
|
||||||
|
OTHER PLATFORMS
|
||||||
|
---------------
|
||||||
|
To compile libsamplerate on platforms which have a Bourne Shell compatible
|
||||||
|
shell, an ANSI C compiler and a make utility should require no more that
|
||||||
|
the following three commands :
|
||||||
|
./configure
|
||||||
|
make
|
||||||
|
make install
|
||||||
|
|
||||||
|
CONTACTS
|
||||||
|
--------
|
||||||
|
|
||||||
|
libsamplerate was written by Erik de Castro Lopo (erikd AT mega-nerd DOT com).
|
||||||
|
The libsamplerate home page is at :
|
||||||
|
|
||||||
|
http://www.mega-nerd.com/libsamplerate/
|
||||||
|
|
||||||
148
source/sound/SRC/common.h
Normal file
148
source/sound/SRC/common.h
Normal file
@ -0,0 +1,148 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef COMMON_H_INCLUDED
|
||||||
|
#define COMMON_H_INCLUDED
|
||||||
|
|
||||||
|
#ifdef HAVE_STDINT_H
|
||||||
|
#include <stdint.h>
|
||||||
|
#elif (SIZEOF_INT == 4)
|
||||||
|
typedef int int32_t ;
|
||||||
|
#elif (SIZEOF_LONG == 4)
|
||||||
|
typedef long int32_t ;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#define SRC_MAX_RATIO 256
|
||||||
|
#define SRC_MIN_RATIO_DIFF (1e-20)
|
||||||
|
|
||||||
|
#define MAX(a,b) (((a) > (b)) ? (a) : (b))
|
||||||
|
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
|
||||||
|
|
||||||
|
#define ARRAY_LEN(x) ((int) (sizeof (x) / sizeof ((x) [0])))
|
||||||
|
#define OFFSETOF(type,member) ((int) (&((type*) 0)->member))
|
||||||
|
|
||||||
|
#define MAKE_MAGIC(a,b,c,d,e,f) ((a) + ((b) << 4) + ((c) << 8) + ((d) << 12) + ((e) << 16) + ((f) << 20))
|
||||||
|
|
||||||
|
|
||||||
|
#include "samplerate.h"
|
||||||
|
|
||||||
|
enum
|
||||||
|
{ SRC_FALSE = 0,
|
||||||
|
SRC_TRUE = 1,
|
||||||
|
|
||||||
|
SRC_MODE_PROCESS = 555,
|
||||||
|
SRC_MODE_CALLBACK = 556
|
||||||
|
} ;
|
||||||
|
|
||||||
|
enum
|
||||||
|
{ SRC_ERR_NO_ERROR = 0,
|
||||||
|
|
||||||
|
SRC_ERR_MALLOC_FAILED,
|
||||||
|
SRC_ERR_BAD_STATE,
|
||||||
|
SRC_ERR_BAD_DATA,
|
||||||
|
SRC_ERR_BAD_DATA_PTR,
|
||||||
|
SRC_ERR_NO_PRIVATE,
|
||||||
|
SRC_ERR_BAD_SRC_RATIO,
|
||||||
|
SRC_ERR_BAD_PROC_PTR,
|
||||||
|
SRC_ERR_SHIFT_BITS,
|
||||||
|
SRC_ERR_FILTER_LEN,
|
||||||
|
SRC_ERR_BAD_CONVERTER,
|
||||||
|
SRC_ERR_BAD_CHANNEL_COUNT,
|
||||||
|
SRC_ERR_SINC_BAD_BUFFER_LEN,
|
||||||
|
SRC_ERR_SIZE_INCOMPATIBILITY,
|
||||||
|
SRC_ERR_BAD_PRIV_PTR,
|
||||||
|
SRC_ERR_BAD_SINC_STATE,
|
||||||
|
SRC_ERR_DATA_OVERLAP,
|
||||||
|
SRC_ERR_BAD_CALLBACK,
|
||||||
|
SRC_ERR_BAD_MODE,
|
||||||
|
SRC_ERR_NULL_CALLBACK,
|
||||||
|
SRC_ERR_NO_VARIABLE_RATIO,
|
||||||
|
|
||||||
|
/* This must be the last error number. */
|
||||||
|
SRC_ERR_MAX_ERROR
|
||||||
|
} ;
|
||||||
|
|
||||||
|
typedef struct SRC_PRIVATE_tag
|
||||||
|
{ double last_ratio, last_position ;
|
||||||
|
|
||||||
|
int error ;
|
||||||
|
int channels ;
|
||||||
|
|
||||||
|
/* SRC_MODE_PROCESS or SRC_MODE_CALLBACK */
|
||||||
|
int mode ;
|
||||||
|
|
||||||
|
/* Pointer to data to converter specific data. */
|
||||||
|
void *private_data ;
|
||||||
|
|
||||||
|
/* Varispeed process function. */
|
||||||
|
int (*vari_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
|
||||||
|
|
||||||
|
/* Constant speed process function. */
|
||||||
|
int (*const_process) (struct SRC_PRIVATE_tag *psrc, SRC_DATA *data) ;
|
||||||
|
|
||||||
|
/* State reset. */
|
||||||
|
void (*reset) (struct SRC_PRIVATE_tag *psrc) ;
|
||||||
|
|
||||||
|
/* Data specific to SRC_MODE_CALLBACK. */
|
||||||
|
src_callback_t callback_func ;
|
||||||
|
void *user_callback_data ;
|
||||||
|
long saved_frames ;
|
||||||
|
float *saved_data ;
|
||||||
|
} SRC_PRIVATE ;
|
||||||
|
|
||||||
|
/* In src_sinc.c */
|
||||||
|
const char* sinc_get_name (int src_enum) ;
|
||||||
|
const char* sinc_get_description (int src_enum) ;
|
||||||
|
|
||||||
|
int sinc_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
|
||||||
|
|
||||||
|
/* In src_linear.c */
|
||||||
|
const char* linear_get_name (int src_enum) ;
|
||||||
|
const char* linear_get_description (int src_enum) ;
|
||||||
|
|
||||||
|
int linear_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
|
||||||
|
|
||||||
|
/* In src_zoh.c */
|
||||||
|
const char* zoh_get_name (int src_enum) ;
|
||||||
|
const char* zoh_get_description (int src_enum) ;
|
||||||
|
|
||||||
|
int zoh_set_converter (SRC_PRIVATE *psrc, int src_enum) ;
|
||||||
|
|
||||||
|
/*----------------------------------------------------------
|
||||||
|
** Common static inline functions.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static inline double
|
||||||
|
fmod_one (double x)
|
||||||
|
{ double res ;
|
||||||
|
|
||||||
|
res = x - lrint (x) ;
|
||||||
|
if (res < 0.0)
|
||||||
|
return res + 1.0 ;
|
||||||
|
|
||||||
|
return res ;
|
||||||
|
} /* fmod_one */
|
||||||
|
|
||||||
|
#endif /* COMMON_H_INCLUDED */
|
||||||
|
|
||||||
143
source/sound/SRC/config.h
Normal file
143
source/sound/SRC/config.h
Normal file
@ -0,0 +1,143 @@
|
|||||||
|
/* src/config.h.in. Generated from configure.ac by autoheader. */
|
||||||
|
|
||||||
|
/* Set to 1 if the compile is GNU GCC. */
|
||||||
|
#undef COMPILER_IS_GCC
|
||||||
|
|
||||||
|
/* Target processor clips on negative float to int conversion. */
|
||||||
|
#define CPU_CLIPS_NEGATIVE 0
|
||||||
|
|
||||||
|
/* Target processor clips on positive float to int conversion. */
|
||||||
|
#define CPU_CLIPS_POSITIVE 0
|
||||||
|
|
||||||
|
/* Target processor is big endian. */
|
||||||
|
#undef CPU_IS_BIG_ENDIAN
|
||||||
|
|
||||||
|
/* Target processor is little endian. */
|
||||||
|
#undef CPU_IS_LITTLE_ENDIAN
|
||||||
|
|
||||||
|
/* Major version of GCC or 3 otherwise. */
|
||||||
|
#undef GCC_MAJOR_VERSION
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `alarm' function. */
|
||||||
|
#undef HAVE_ALARM
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `calloc' function. */
|
||||||
|
#undef HAVE_CALLOC
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `ceil' function. */
|
||||||
|
#undef HAVE_CEIL
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <dlfcn.h> header file. */
|
||||||
|
#undef HAVE_DLFCN_H
|
||||||
|
|
||||||
|
/* Set to 1 if you have libfftw3. */
|
||||||
|
#undef HAVE_FFTW3
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `floor' function. */
|
||||||
|
#undef HAVE_FLOOR
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `fmod' function. */
|
||||||
|
#undef HAVE_FMOD
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `free' function. */
|
||||||
|
#undef HAVE_FREE
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <inttypes.h> header file. */
|
||||||
|
#undef HAVE_INTTYPES_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `m' library (-lm). */
|
||||||
|
#undef HAVE_LIBM
|
||||||
|
|
||||||
|
/* Define if you have C99's lrint function. */
|
||||||
|
#ifdef DOS
|
||||||
|
#define HAVE_LRINT 0
|
||||||
|
#else
|
||||||
|
#define HAVE_LRINT 1
|
||||||
|
#endif
|
||||||
|
|
||||||
|
/* Define if you have C99's lrintf function. */
|
||||||
|
#define HAVE_LRINTF 1
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `malloc' function. */
|
||||||
|
#undef HAVE_MALLOC
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `memcpy' function. */
|
||||||
|
#undef HAVE_MEMCPY
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `memmove' function. */
|
||||||
|
#undef HAVE_MEMMOVE
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <memory.h> header file. */
|
||||||
|
#undef HAVE_MEMORY_H
|
||||||
|
|
||||||
|
/* Define if you have signal SIGALRM. */
|
||||||
|
#undef HAVE_SIGALRM
|
||||||
|
|
||||||
|
/* Define to 1 if you have the `signal' function. */
|
||||||
|
#undef HAVE_SIGNAL
|
||||||
|
|
||||||
|
/* Set to 1 if you have libsndfile. */
|
||||||
|
#undef HAVE_SNDFILE
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <stdint.h> header file. */
|
||||||
|
#define HAVE_STDINT_H 1
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <stdlib.h> header file. */
|
||||||
|
#undef HAVE_STDLIB_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <strings.h> header file. */
|
||||||
|
#undef HAVE_STRINGS_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <string.h> header file. */
|
||||||
|
#undef HAVE_STRING_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <sys/stat.h> header file. */
|
||||||
|
#undef HAVE_SYS_STAT_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <sys/times.h> header file. */
|
||||||
|
#undef HAVE_SYS_TIMES_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <sys/types.h> header file. */
|
||||||
|
#undef HAVE_SYS_TYPES_H
|
||||||
|
|
||||||
|
/* Define to 1 if you have the <unistd.h> header file. */
|
||||||
|
#undef HAVE_UNISTD_H
|
||||||
|
|
||||||
|
/* Set to 1 if compiling for Win32 */
|
||||||
|
#undef OS_IS_WIN32
|
||||||
|
|
||||||
|
/* Name of package */
|
||||||
|
#define PACKAGE "OGC"
|
||||||
|
|
||||||
|
/* Define to the address where bug reports for this package should be sent. */
|
||||||
|
#undef PACKAGE_BUGREPORT
|
||||||
|
|
||||||
|
/* Define to the full name of this package. */
|
||||||
|
#undef PACKAGE_NAME
|
||||||
|
|
||||||
|
/* Define to the full name and version of this package. */
|
||||||
|
#undef PACKAGE_STRING
|
||||||
|
|
||||||
|
/* Define to the one symbol short name of this package. */
|
||||||
|
#undef PACKAGE_TARNAME
|
||||||
|
|
||||||
|
/* Define to the version of this package. */
|
||||||
|
#undef PACKAGE_VERSION
|
||||||
|
|
||||||
|
/* The size of `double', as computed by sizeof. */
|
||||||
|
#undef SIZEOF_DOUBLE
|
||||||
|
|
||||||
|
/* The size of `float', as computed by sizeof. */
|
||||||
|
#undef SIZEOF_FLOAT
|
||||||
|
|
||||||
|
/* The size of `int', as computed by sizeof. */
|
||||||
|
#undef SIZEOF_INT
|
||||||
|
|
||||||
|
/* The size of `long', as computed by sizeof. */
|
||||||
|
#undef SIZEOF_LONG
|
||||||
|
|
||||||
|
/* Define to 1 if you have the ANSI C header files. */
|
||||||
|
#undef STDC_HEADERS
|
||||||
|
|
||||||
|
/* Version number of package */
|
||||||
|
#define VERSION "0.1.4"
|
||||||
2505
source/sound/SRC/fastest_coeffs.h
Normal file
2505
source/sound/SRC/fastest_coeffs.h
Normal file
File diff suppressed because it is too large
Load Diff
255
source/sound/SRC/float_cast.h
Normal file
255
source/sound/SRC/float_cast.h
Normal file
@ -0,0 +1,255 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2001-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU Lesser General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2.1 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU Lesser General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU Lesser General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/* Version 1.4 */
|
||||||
|
|
||||||
|
#ifndef FLOAT_CAST_HEADER
|
||||||
|
#define FLOAT_CAST_HEADER
|
||||||
|
|
||||||
|
/*============================================================================
|
||||||
|
** On Intel Pentium processors (especially PIII and probably P4), converting
|
||||||
|
** from float to int is very slow. To meet the C specs, the code produced by
|
||||||
|
** most C compilers targeting Pentium needs to change the FPU rounding mode
|
||||||
|
** before the float to int conversion is performed.
|
||||||
|
**
|
||||||
|
** Changing the FPU rounding mode causes the FPU pipeline to be flushed. It
|
||||||
|
** is this flushing of the pipeline which is so slow.
|
||||||
|
**
|
||||||
|
** Fortunately the ISO C99 specifications define the functions lrint, lrintf,
|
||||||
|
** llrint and llrintf which fix this problem as a side effect.
|
||||||
|
**
|
||||||
|
** On Unix-like systems, the configure process should have detected the
|
||||||
|
** presence of these functions. If they weren't found we have to replace them
|
||||||
|
** here with a standard C cast.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** The C99 prototypes for lrint and lrintf are as follows:
|
||||||
|
**
|
||||||
|
** long int lrintf (float x) ;
|
||||||
|
** long int lrint (double x) ;
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include "config.h"
|
||||||
|
|
||||||
|
/*
|
||||||
|
** The presence of the required functions are detected during the configure
|
||||||
|
** process and the values HAVE_LRINT and HAVE_LRINTF are set accordingly in
|
||||||
|
** the config.h file.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define HAVE_LRINT_REPLACEMENT 0
|
||||||
|
|
||||||
|
#if (HAVE_LRINT && HAVE_LRINTF)
|
||||||
|
|
||||||
|
/*
|
||||||
|
** These defines enable functionality introduced with the 1999 ISO C
|
||||||
|
** standard. They must be defined before the inclusion of math.h to
|
||||||
|
** engage them. If optimisation is enabled, these functions will be
|
||||||
|
** inlined. With optimisation switched off, you have to link in the
|
||||||
|
** maths library using -lm.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define _ISOC9X_SOURCE 1
|
||||||
|
#define _ISOC99_SOURCE 1
|
||||||
|
|
||||||
|
#define __USE_ISOC9X 1
|
||||||
|
#define __USE_ISOC99 1
|
||||||
|
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
#elif (defined (__CYGWIN__))
|
||||||
|
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
#undef HAVE_LRINT_REPLACEMENT
|
||||||
|
#define HAVE_LRINT_REPLACEMENT 1
|
||||||
|
|
||||||
|
#undef lrint
|
||||||
|
#undef lrintf
|
||||||
|
|
||||||
|
#define lrint double2int
|
||||||
|
#define lrintf float2int
|
||||||
|
|
||||||
|
/*
|
||||||
|
** The native CYGWIN lrint and lrintf functions are buggy:
|
||||||
|
** http://sourceware.org/ml/cygwin/2005-06/msg00153.html
|
||||||
|
** http://sourceware.org/ml/cygwin/2005-09/msg00047.html
|
||||||
|
** and slow.
|
||||||
|
** These functions (pulled from the Public Domain MinGW math.h header)
|
||||||
|
** replace the native versions.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static inline long double2int (double in)
|
||||||
|
{ long retval ;
|
||||||
|
|
||||||
|
__asm__ __volatile__
|
||||||
|
( "fistpl %0"
|
||||||
|
: "=m" (retval)
|
||||||
|
: "t" (in)
|
||||||
|
: "st"
|
||||||
|
) ;
|
||||||
|
|
||||||
|
return retval ;
|
||||||
|
} /* double2int */
|
||||||
|
|
||||||
|
static inline long float2int (float in)
|
||||||
|
{ long retval ;
|
||||||
|
|
||||||
|
__asm__ __volatile__
|
||||||
|
( "fistpl %0"
|
||||||
|
: "=m" (retval)
|
||||||
|
: "t" (in)
|
||||||
|
: "st"
|
||||||
|
) ;
|
||||||
|
|
||||||
|
return retval ;
|
||||||
|
} /* float2int */
|
||||||
|
|
||||||
|
#elif (defined (WIN32) || defined (_WIN32))
|
||||||
|
|
||||||
|
#undef HAVE_LRINT_REPLACEMENT
|
||||||
|
#define HAVE_LRINT_REPLACEMENT 1
|
||||||
|
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Win32 doesn't seem to have these functions.
|
||||||
|
** Therefore implement inline versions of these functions here.
|
||||||
|
*/
|
||||||
|
|
||||||
|
__inline long int
|
||||||
|
lrint (double flt)
|
||||||
|
{ int intgr ;
|
||||||
|
|
||||||
|
_asm
|
||||||
|
{ fld flt
|
||||||
|
fistp intgr
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return intgr ;
|
||||||
|
}
|
||||||
|
|
||||||
|
__inline long int
|
||||||
|
lrintf (float flt)
|
||||||
|
{ int intgr ;
|
||||||
|
|
||||||
|
_asm
|
||||||
|
{ fld flt
|
||||||
|
fistp intgr
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return intgr ;
|
||||||
|
}
|
||||||
|
|
||||||
|
#elif (defined (__MWERKS__) && defined (macintosh))
|
||||||
|
|
||||||
|
/* This MacOS 9 solution was provided by Stephane Letz */
|
||||||
|
|
||||||
|
#undef HAVE_LRINT_REPLACEMENT
|
||||||
|
#define HAVE_LRINT_REPLACEMENT 1
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
#undef lrint
|
||||||
|
#undef lrintf
|
||||||
|
|
||||||
|
#define lrint double2int
|
||||||
|
#define lrintf float2int
|
||||||
|
|
||||||
|
inline int
|
||||||
|
float2int (register float in)
|
||||||
|
{ long res [2] ;
|
||||||
|
|
||||||
|
asm
|
||||||
|
{ fctiw in, in
|
||||||
|
stfd in, res
|
||||||
|
}
|
||||||
|
return res [1] ;
|
||||||
|
} /* float2int */
|
||||||
|
|
||||||
|
inline int
|
||||||
|
double2int (register double in)
|
||||||
|
{ long res [2] ;
|
||||||
|
|
||||||
|
asm
|
||||||
|
{ fctiw in, in
|
||||||
|
stfd in, res
|
||||||
|
}
|
||||||
|
return res [1] ;
|
||||||
|
} /* double2int */
|
||||||
|
|
||||||
|
#elif (defined (__MACH__) && defined (__APPLE__))
|
||||||
|
|
||||||
|
/* For Apple MacOSX. */
|
||||||
|
|
||||||
|
#undef HAVE_LRINT_REPLACEMENT
|
||||||
|
#define HAVE_LRINT_REPLACEMENT 1
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
#undef lrint
|
||||||
|
#undef lrintf
|
||||||
|
|
||||||
|
#define lrint double2int
|
||||||
|
#define lrintf float2int
|
||||||
|
|
||||||
|
inline static long
|
||||||
|
float2int (register float in)
|
||||||
|
{ int res [2] ;
|
||||||
|
|
||||||
|
__asm__ __volatile__
|
||||||
|
( "fctiw %1, %1\n\t"
|
||||||
|
"stfd %1, %0"
|
||||||
|
: "=m" (res) /* Output */
|
||||||
|
: "f" (in) /* Input */
|
||||||
|
: "memory"
|
||||||
|
) ;
|
||||||
|
|
||||||
|
return res [1] ;
|
||||||
|
} /* lrintf */
|
||||||
|
|
||||||
|
inline static long
|
||||||
|
double2int (register double in)
|
||||||
|
{ int res [2] ;
|
||||||
|
|
||||||
|
__asm__ __volatile__
|
||||||
|
( "fctiw %1, %1\n\t"
|
||||||
|
"stfd %1, %0"
|
||||||
|
: "=m" (res) /* Output */
|
||||||
|
: "f" (in) /* Input */
|
||||||
|
: "memory"
|
||||||
|
) ;
|
||||||
|
|
||||||
|
return res [1] ;
|
||||||
|
} /* lrint */
|
||||||
|
|
||||||
|
#else
|
||||||
|
#ifndef __sgi
|
||||||
|
#warning "Don't have the functions lrint() and lrintf()."
|
||||||
|
#warning "Replacing these functions with a standard C cast."
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#include <math.h>
|
||||||
|
|
||||||
|
#define lrint(dbl) ((long) (dbl))
|
||||||
|
#define lrintf(flt) ((long) (flt))
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
||||||
|
|
||||||
|
#endif /* FLOAT_CAST_HEADER */
|
||||||
|
|
||||||
340279
source/sound/SRC/high_qual_coeffs.h
Normal file
340279
source/sound/SRC/high_qual_coeffs.h
Normal file
File diff suppressed because it is too large
Load Diff
22480
source/sound/SRC/mid_qual_coeffs.h
Normal file
22480
source/sound/SRC/mid_qual_coeffs.h
Normal file
File diff suppressed because it is too large
Load Diff
539
source/sound/SRC/samplerate.c
Normal file
539
source/sound/SRC/samplerate.c
Normal file
@ -0,0 +1,539 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "config.h"
|
||||||
|
|
||||||
|
#include "samplerate.h"
|
||||||
|
#include "float_cast.h"
|
||||||
|
#include "common.h"
|
||||||
|
|
||||||
|
static int psrc_set_converter (SRC_PRIVATE *psrc, int converter_type) ;
|
||||||
|
|
||||||
|
|
||||||
|
static inline int
|
||||||
|
is_bad_src_ratio (double ratio)
|
||||||
|
{ return (ratio < (1.0 / SRC_MAX_RATIO) || ratio > (1.0 * SRC_MAX_RATIO)) ;
|
||||||
|
} /* is_bad_src_ratio */
|
||||||
|
|
||||||
|
SRC_STATE *
|
||||||
|
src_new (int converter_type, int channels, int *error)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
|
||||||
|
if (error)
|
||||||
|
*error = SRC_ERR_NO_ERROR ;
|
||||||
|
|
||||||
|
if (channels < 1)
|
||||||
|
{ if (error)
|
||||||
|
*error = SRC_ERR_BAD_CHANNEL_COUNT ;
|
||||||
|
return NULL ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if ((psrc = calloc (1, sizeof (*psrc))) == NULL)
|
||||||
|
{ if (error)
|
||||||
|
*error = SRC_ERR_MALLOC_FAILED ;
|
||||||
|
return NULL ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
psrc->channels = channels ;
|
||||||
|
psrc->mode = SRC_MODE_PROCESS ;
|
||||||
|
|
||||||
|
if (psrc_set_converter (psrc, converter_type) != SRC_ERR_NO_ERROR)
|
||||||
|
{ if (error)
|
||||||
|
*error = SRC_ERR_BAD_CONVERTER ;
|
||||||
|
free (psrc) ;
|
||||||
|
psrc = NULL ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
src_reset ((SRC_STATE*) psrc) ;
|
||||||
|
|
||||||
|
return (SRC_STATE*) psrc ;
|
||||||
|
} /* src_new */
|
||||||
|
|
||||||
|
SRC_STATE*
|
||||||
|
src_callback_new (src_callback_t func, int converter_type, int channels, int *error, void* cb_data)
|
||||||
|
{ SRC_STATE *src_state ;
|
||||||
|
|
||||||
|
if (func == NULL)
|
||||||
|
{ if (error)
|
||||||
|
*error = SRC_ERR_BAD_CALLBACK ;
|
||||||
|
return NULL ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (error != NULL)
|
||||||
|
*error = 0 ;
|
||||||
|
|
||||||
|
src_state = src_new (converter_type, channels, error) ;
|
||||||
|
|
||||||
|
src_reset (src_state) ;
|
||||||
|
|
||||||
|
((SRC_PRIVATE*) src_state)->mode = SRC_MODE_CALLBACK ;
|
||||||
|
((SRC_PRIVATE*) src_state)->callback_func = func ;
|
||||||
|
((SRC_PRIVATE*) src_state)->user_callback_data = cb_data ;
|
||||||
|
|
||||||
|
return src_state ;
|
||||||
|
} /* src_callback_new */
|
||||||
|
|
||||||
|
SRC_STATE *
|
||||||
|
src_delete (SRC_STATE *state)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
|
||||||
|
psrc = (SRC_PRIVATE*) state ;
|
||||||
|
if (psrc)
|
||||||
|
{ if (psrc->private_data)
|
||||||
|
free (psrc->private_data) ;
|
||||||
|
memset (psrc, 0, sizeof (SRC_PRIVATE)) ;
|
||||||
|
free (psrc) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* src_state */
|
||||||
|
|
||||||
|
int
|
||||||
|
src_process (SRC_STATE *state, SRC_DATA *data)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
int error ;
|
||||||
|
|
||||||
|
psrc = (SRC_PRIVATE*) state ;
|
||||||
|
|
||||||
|
if (psrc == NULL)
|
||||||
|
return SRC_ERR_BAD_STATE ;
|
||||||
|
if (psrc->vari_process == NULL || psrc->const_process == NULL)
|
||||||
|
return SRC_ERR_BAD_PROC_PTR ;
|
||||||
|
|
||||||
|
if (psrc->mode != SRC_MODE_PROCESS)
|
||||||
|
return SRC_ERR_BAD_MODE ;
|
||||||
|
|
||||||
|
/* Check for valid SRC_DATA first. */
|
||||||
|
if (data == NULL)
|
||||||
|
return SRC_ERR_BAD_DATA ;
|
||||||
|
|
||||||
|
/* Check src_ratio is in range. */
|
||||||
|
if (is_bad_src_ratio (data->src_ratio))
|
||||||
|
return SRC_ERR_BAD_SRC_RATIO ;
|
||||||
|
|
||||||
|
/* And that data_in and data_out are valid. */
|
||||||
|
if (data->data_in == NULL || data->data_out == NULL)
|
||||||
|
return SRC_ERR_BAD_DATA_PTR ;
|
||||||
|
|
||||||
|
if (data->data_in == NULL)
|
||||||
|
data->input_frames = 0 ;
|
||||||
|
|
||||||
|
if (data->input_frames < 0)
|
||||||
|
data->input_frames = 0 ;
|
||||||
|
if (data->output_frames < 0)
|
||||||
|
data->output_frames = 0 ;
|
||||||
|
|
||||||
|
if (data->data_in < data->data_out)
|
||||||
|
{ if (data->data_in + data->input_frames * psrc->channels > data->data_out)
|
||||||
|
{ /*-printf ("\n\ndata_in: %p data_out: %p\n",
|
||||||
|
(void*) (data->data_in + data->input_frames * psrc->channels), (void*) data->data_out) ;-*/
|
||||||
|
return SRC_ERR_DATA_OVERLAP ;
|
||||||
|
} ;
|
||||||
|
}
|
||||||
|
else if (data->data_out + data->output_frames * psrc->channels > data->data_in)
|
||||||
|
{ /*-printf ("\n\ndata_in : %p ouput frames: %ld data_out: %p\n", (void*) data->data_in, data->output_frames, (void*) data->data_out) ;
|
||||||
|
|
||||||
|
printf ("data_out: %p (%p) data_in: %p\n", (void*) data->data_out,
|
||||||
|
(void*) (data->data_out + data->input_frames * psrc->channels), (void*) data->data_in) ;-*/
|
||||||
|
return SRC_ERR_DATA_OVERLAP ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Set the input and output counts to zero. */
|
||||||
|
data->input_frames_used = 0 ;
|
||||||
|
data->output_frames_gen = 0 ;
|
||||||
|
|
||||||
|
/* Special case for when last_ratio has not been set. */
|
||||||
|
if (psrc->last_ratio < (1.0 / SRC_MAX_RATIO))
|
||||||
|
psrc->last_ratio = data->src_ratio ;
|
||||||
|
|
||||||
|
/* Now process. */
|
||||||
|
if (fabs (psrc->last_ratio - data->src_ratio) < 1e-15)
|
||||||
|
error = psrc->const_process (psrc, data) ;
|
||||||
|
else
|
||||||
|
error = psrc->vari_process (psrc, data) ;
|
||||||
|
|
||||||
|
return error ;
|
||||||
|
} /* src_process */
|
||||||
|
|
||||||
|
long
|
||||||
|
src_callback_read (SRC_STATE *state, double src_ratio, long frames, float *data)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
SRC_DATA src_data ;
|
||||||
|
|
||||||
|
long output_frames_gen ;
|
||||||
|
int error = 0 ;
|
||||||
|
|
||||||
|
if (state == NULL)
|
||||||
|
return 0 ;
|
||||||
|
|
||||||
|
if (frames <= 0)
|
||||||
|
return 0 ;
|
||||||
|
|
||||||
|
psrc = (SRC_PRIVATE*) state ;
|
||||||
|
|
||||||
|
if (psrc->mode != SRC_MODE_CALLBACK)
|
||||||
|
{ psrc->error = SRC_ERR_BAD_MODE ;
|
||||||
|
return 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (psrc->callback_func == NULL)
|
||||||
|
{ psrc->error = SRC_ERR_NULL_CALLBACK ;
|
||||||
|
return 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
memset (&src_data, 0, sizeof (src_data)) ;
|
||||||
|
|
||||||
|
/* Check src_ratio is in range. */
|
||||||
|
if (is_bad_src_ratio (src_ratio))
|
||||||
|
{ psrc->error = SRC_ERR_BAD_SRC_RATIO ;
|
||||||
|
return 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Switch modes temporarily. */
|
||||||
|
src_data.src_ratio = src_ratio ;
|
||||||
|
src_data.data_out = data ;
|
||||||
|
src_data.output_frames = frames ;
|
||||||
|
|
||||||
|
src_data.data_in = psrc->saved_data ;
|
||||||
|
src_data.input_frames = psrc->saved_frames ;
|
||||||
|
|
||||||
|
output_frames_gen = 0 ;
|
||||||
|
while (output_frames_gen < frames)
|
||||||
|
{
|
||||||
|
if (src_data.input_frames == 0)
|
||||||
|
{ float *ptr ;
|
||||||
|
|
||||||
|
src_data.input_frames = psrc->callback_func (psrc->user_callback_data, &ptr) ;
|
||||||
|
src_data.data_in = ptr ;
|
||||||
|
|
||||||
|
if (src_data.input_frames == 0)
|
||||||
|
src_data.end_of_input = 1 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Now call process function. However, we need to set the mode
|
||||||
|
** to SRC_MODE_PROCESS first and when we return set it back to
|
||||||
|
** SRC_MODE_CALLBACK.
|
||||||
|
*/
|
||||||
|
psrc->mode = SRC_MODE_PROCESS ;
|
||||||
|
error = src_process (state, &src_data) ;
|
||||||
|
psrc->mode = SRC_MODE_CALLBACK ;
|
||||||
|
|
||||||
|
if (error != 0)
|
||||||
|
break ;
|
||||||
|
|
||||||
|
src_data.data_in += src_data.input_frames_used * psrc->channels ;
|
||||||
|
src_data.input_frames -= src_data.input_frames_used ;
|
||||||
|
|
||||||
|
src_data.data_out += src_data.output_frames_gen * psrc->channels ;
|
||||||
|
src_data.output_frames -= src_data.output_frames_gen ;
|
||||||
|
|
||||||
|
output_frames_gen += src_data.output_frames_gen ;
|
||||||
|
|
||||||
|
if (src_data.end_of_input == SRC_TRUE && src_data.output_frames_gen == 0)
|
||||||
|
break ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
psrc->saved_data = src_data.data_in ;
|
||||||
|
psrc->saved_frames = src_data.input_frames ;
|
||||||
|
|
||||||
|
if (error != 0)
|
||||||
|
{ psrc->error = error ;
|
||||||
|
return 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return output_frames_gen ;
|
||||||
|
} /* src_callback_read */
|
||||||
|
|
||||||
|
/*==========================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
src_set_ratio (SRC_STATE *state, double new_ratio)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
|
||||||
|
psrc = (SRC_PRIVATE*) state ;
|
||||||
|
|
||||||
|
if (psrc == NULL)
|
||||||
|
return SRC_ERR_BAD_STATE ;
|
||||||
|
if (psrc->vari_process == NULL || psrc->const_process == NULL)
|
||||||
|
return SRC_ERR_BAD_PROC_PTR ;
|
||||||
|
|
||||||
|
if (is_bad_src_ratio (new_ratio))
|
||||||
|
return SRC_ERR_BAD_SRC_RATIO ;
|
||||||
|
|
||||||
|
psrc->last_ratio = new_ratio ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* src_set_ratio */
|
||||||
|
|
||||||
|
int
|
||||||
|
src_reset (SRC_STATE *state)
|
||||||
|
{ SRC_PRIVATE *psrc ;
|
||||||
|
|
||||||
|
if ((psrc = (SRC_PRIVATE*) state) == NULL)
|
||||||
|
return SRC_ERR_BAD_STATE ;
|
||||||
|
|
||||||
|
if (psrc->reset != NULL)
|
||||||
|
psrc->reset (psrc) ;
|
||||||
|
|
||||||
|
psrc->last_position = 0.0 ;
|
||||||
|
psrc->last_ratio = 0.0 ;
|
||||||
|
|
||||||
|
psrc->saved_data = NULL ;
|
||||||
|
psrc->saved_frames = 0 ;
|
||||||
|
|
||||||
|
psrc->error = SRC_ERR_NO_ERROR ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* src_reset */
|
||||||
|
|
||||||
|
/*==============================================================================
|
||||||
|
** Control functions.
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char *
|
||||||
|
src_get_name (int converter_type)
|
||||||
|
{ const char *desc ;
|
||||||
|
|
||||||
|
if ((desc = sinc_get_name (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
if ((desc = zoh_get_name (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
if ((desc = linear_get_name (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* src_get_name */
|
||||||
|
|
||||||
|
const char *
|
||||||
|
src_get_description (int converter_type)
|
||||||
|
{ const char *desc ;
|
||||||
|
|
||||||
|
if ((desc = sinc_get_description (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
if ((desc = zoh_get_description (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
if ((desc = linear_get_description (converter_type)) != NULL)
|
||||||
|
return desc ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* src_get_description */
|
||||||
|
|
||||||
|
const char *
|
||||||
|
src_get_version (void)
|
||||||
|
{ return PACKAGE "-" VERSION " (c) 2002-2008 Erik de Castro Lopo" ;
|
||||||
|
} /* src_get_version */
|
||||||
|
|
||||||
|
int
|
||||||
|
src_is_valid_ratio (double ratio)
|
||||||
|
{
|
||||||
|
if (is_bad_src_ratio (ratio))
|
||||||
|
return SRC_FALSE ;
|
||||||
|
|
||||||
|
return SRC_TRUE ;
|
||||||
|
} /* src_is_valid_ratio */
|
||||||
|
|
||||||
|
/*==============================================================================
|
||||||
|
** Error reporting functions.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
src_error (SRC_STATE *state)
|
||||||
|
{ if (state)
|
||||||
|
return ((SRC_PRIVATE*) state)->error ;
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* src_error */
|
||||||
|
|
||||||
|
const char*
|
||||||
|
src_strerror (int error)
|
||||||
|
{
|
||||||
|
switch (error)
|
||||||
|
{ case SRC_ERR_NO_ERROR :
|
||||||
|
return "No error." ;
|
||||||
|
case SRC_ERR_MALLOC_FAILED :
|
||||||
|
return "Malloc failed." ;
|
||||||
|
case SRC_ERR_BAD_STATE :
|
||||||
|
return "SRC_STATE pointer is NULL." ;
|
||||||
|
case SRC_ERR_BAD_DATA :
|
||||||
|
return "SRC_DATA pointer is NULL." ;
|
||||||
|
case SRC_ERR_BAD_DATA_PTR :
|
||||||
|
return "SRC_DATA->data_out is NULL." ;
|
||||||
|
case SRC_ERR_NO_PRIVATE :
|
||||||
|
return "Internal error. No private data." ;
|
||||||
|
case SRC_ERR_BAD_SRC_RATIO :
|
||||||
|
return "SRC ratio outside [1/12, 12] range." ;
|
||||||
|
case SRC_ERR_BAD_SINC_STATE :
|
||||||
|
return "src_process() called without reset after end_of_input." ;
|
||||||
|
case SRC_ERR_BAD_PROC_PTR :
|
||||||
|
return "Internal error. No process pointer." ;
|
||||||
|
case SRC_ERR_SHIFT_BITS :
|
||||||
|
return "Internal error. SHIFT_BITS too large." ;
|
||||||
|
case SRC_ERR_FILTER_LEN :
|
||||||
|
return "Internal error. Filter length too large." ;
|
||||||
|
case SRC_ERR_BAD_CONVERTER :
|
||||||
|
return "Bad converter number." ;
|
||||||
|
case SRC_ERR_BAD_CHANNEL_COUNT :
|
||||||
|
return "Channel count must be >= 1." ;
|
||||||
|
case SRC_ERR_SINC_BAD_BUFFER_LEN :
|
||||||
|
return "Internal error. Bad buffer length. Please report this." ;
|
||||||
|
case SRC_ERR_SIZE_INCOMPATIBILITY :
|
||||||
|
return "Internal error. Input data / internal buffer size difference. Please report this." ;
|
||||||
|
case SRC_ERR_BAD_PRIV_PTR :
|
||||||
|
return "Internal error. Private pointer is NULL. Please report this." ;
|
||||||
|
case SRC_ERR_DATA_OVERLAP :
|
||||||
|
return "Input and output data arrays overlap." ;
|
||||||
|
case SRC_ERR_BAD_CALLBACK :
|
||||||
|
return "Supplied callback function pointer is NULL." ;
|
||||||
|
case SRC_ERR_BAD_MODE :
|
||||||
|
return "Calling mode differs from initialisation mode (ie process v callback)." ;
|
||||||
|
case SRC_ERR_NULL_CALLBACK :
|
||||||
|
return "Callback function pointer is NULL in src_callback_read ()." ;
|
||||||
|
case SRC_ERR_NO_VARIABLE_RATIO :
|
||||||
|
return "This converter only allows constant conversion ratios." ;
|
||||||
|
|
||||||
|
case SRC_ERR_MAX_ERROR :
|
||||||
|
return "Placeholder. No error defined for this error number." ;
|
||||||
|
|
||||||
|
default : break ;
|
||||||
|
}
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* src_strerror */
|
||||||
|
|
||||||
|
/*==============================================================================
|
||||||
|
** Simple interface for performing a single conversion from input buffer to
|
||||||
|
** output buffer at a fixed conversion ratio.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int
|
||||||
|
src_simple (SRC_DATA *src_data, int converter, int channels)
|
||||||
|
{ SRC_STATE *src_state ;
|
||||||
|
int error ;
|
||||||
|
|
||||||
|
if ((src_state = src_new (converter, channels, &error)) == NULL)
|
||||||
|
return error ;
|
||||||
|
|
||||||
|
src_data->end_of_input = 1 ; /* Only one buffer worth of input. */
|
||||||
|
|
||||||
|
error = src_process (src_state, src_data) ;
|
||||||
|
|
||||||
|
src_state = src_delete (src_state) ;
|
||||||
|
|
||||||
|
return error ;
|
||||||
|
} /* src_simple */
|
||||||
|
|
||||||
|
void
|
||||||
|
src_short_to_float_array (const short *in, float *out, int len)
|
||||||
|
{
|
||||||
|
while (len)
|
||||||
|
{ len -- ;
|
||||||
|
out [len] = (float) (in [len] / (1.0 * 0x8000)) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return ;
|
||||||
|
} /* src_short_to_float_array */
|
||||||
|
|
||||||
|
void
|
||||||
|
src_float_to_short_array (const float *in, short *out, int len)
|
||||||
|
{ double scaled_value ;
|
||||||
|
|
||||||
|
while (len)
|
||||||
|
{ len -- ;
|
||||||
|
|
||||||
|
scaled_value = in [len] * (8.0 * 0x10000000) ;
|
||||||
|
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
|
||||||
|
{ out [len] = 32767 ;
|
||||||
|
continue ;
|
||||||
|
} ;
|
||||||
|
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
|
||||||
|
{ out [len] = -32768 ;
|
||||||
|
continue ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
out [len] = (short) (lrint (scaled_value) >> 16) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
} /* src_float_to_short_array */
|
||||||
|
|
||||||
|
void
|
||||||
|
src_int_to_float_array (const int *in, float *out, int len)
|
||||||
|
{
|
||||||
|
while (len)
|
||||||
|
{ len -- ;
|
||||||
|
out [len] = (float) (in [len] / (8.0 * 0x10000000)) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return ;
|
||||||
|
} /* src_int_to_float_array */
|
||||||
|
|
||||||
|
void
|
||||||
|
src_float_to_int_array (const float *in, int *out, int len)
|
||||||
|
{ double scaled_value ;
|
||||||
|
|
||||||
|
while (len)
|
||||||
|
{ len -- ;
|
||||||
|
|
||||||
|
scaled_value = in [len] * (8.0 * 0x10000000) ;
|
||||||
|
if (CPU_CLIPS_POSITIVE == 0 && scaled_value >= (1.0 * 0x7FFFFFFF))
|
||||||
|
{ out [len] = 0x7fffffff ;
|
||||||
|
continue ;
|
||||||
|
} ;
|
||||||
|
if (CPU_CLIPS_NEGATIVE == 0 && scaled_value <= (-8.0 * 0x10000000))
|
||||||
|
{ out [len] = -1 - 0x7fffffff ;
|
||||||
|
continue ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
out [len] = lrint (scaled_value) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
} /* src_float_to_int_array */
|
||||||
|
|
||||||
|
/*==============================================================================
|
||||||
|
** Private functions.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
psrc_set_converter (SRC_PRIVATE *psrc, int converter_type)
|
||||||
|
{
|
||||||
|
if (sinc_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
|
||||||
|
if (zoh_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
|
||||||
|
if (linear_set_converter (psrc, converter_type) == SRC_ERR_NO_ERROR)
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
|
||||||
|
return SRC_ERR_BAD_CONVERTER ;
|
||||||
|
} /* psrc_set_converter */
|
||||||
|
|
||||||
197
source/sound/SRC/samplerate.h
Normal file
197
source/sound/SRC/samplerate.h
Normal file
@ -0,0 +1,197 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** API documentation is available here:
|
||||||
|
** http://www.mega-nerd.com/SRC/api.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef SAMPLERATE_H
|
||||||
|
#define SAMPLERATE_H
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
extern "C" {
|
||||||
|
#endif /* __cplusplus */
|
||||||
|
|
||||||
|
|
||||||
|
/* Opaque data type SRC_STATE. */
|
||||||
|
typedef struct SRC_STATE_tag SRC_STATE ;
|
||||||
|
|
||||||
|
/* SRC_DATA is used to pass data to src_simple() and src_process(). */
|
||||||
|
typedef struct
|
||||||
|
{ float *data_in, *data_out ;
|
||||||
|
|
||||||
|
long input_frames, output_frames ;
|
||||||
|
long input_frames_used, output_frames_gen ;
|
||||||
|
|
||||||
|
int end_of_input ;
|
||||||
|
|
||||||
|
double src_ratio ;
|
||||||
|
} SRC_DATA ;
|
||||||
|
|
||||||
|
/* SRC_CB_DATA is used with callback based API. */
|
||||||
|
typedef struct
|
||||||
|
{ long frames ;
|
||||||
|
float *data_in ;
|
||||||
|
} SRC_CB_DATA ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** User supplied callback function type for use with src_callback_new()
|
||||||
|
** and src_callback_read(). First parameter is the same pointer that was
|
||||||
|
** passed into src_callback_new(). Second parameter is pointer to a
|
||||||
|
** pointer. The user supplied callback function must modify *data to
|
||||||
|
** point to the start of the user supplied float array. The user supplied
|
||||||
|
** function must return the number of frames that **data points to.
|
||||||
|
*/
|
||||||
|
|
||||||
|
typedef long (*src_callback_t) (void *cb_data, float **data) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Standard initialisation function : return an anonymous pointer to the
|
||||||
|
** internal state of the converter. Choose a converter from the enums below.
|
||||||
|
** Error returned in *error.
|
||||||
|
*/
|
||||||
|
|
||||||
|
SRC_STATE* src_new (int converter_type, int channels, int *error) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Initilisation for callback based API : return an anonymous pointer to the
|
||||||
|
** internal state of the converter. Choose a converter from the enums below.
|
||||||
|
** The cb_data pointer can point to any data or be set to NULL. Whatever the
|
||||||
|
** value, when processing, user supplied function "func" gets called with
|
||||||
|
** cb_data as first parameter.
|
||||||
|
*/
|
||||||
|
|
||||||
|
SRC_STATE* src_callback_new (src_callback_t func, int converter_type, int channels,
|
||||||
|
int *error, void* cb_data) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Cleanup all internal allocations.
|
||||||
|
** Always returns NULL.
|
||||||
|
*/
|
||||||
|
|
||||||
|
SRC_STATE* src_delete (SRC_STATE *state) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Standard processing function.
|
||||||
|
** Returns non zero on error.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_process (SRC_STATE *state, SRC_DATA *data) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Callback based processing function. Read up to frames worth of data from
|
||||||
|
** the converter int *data and return frames read or -1 on error.
|
||||||
|
*/
|
||||||
|
long src_callback_read (SRC_STATE *state, double src_ratio, long frames, float *data) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Simple interface for performing a single conversion from input buffer to
|
||||||
|
** output buffer at a fixed conversion ratio.
|
||||||
|
** Simple interface does not require initialisation as it can only operate on
|
||||||
|
** a single buffer worth of audio.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_simple (SRC_DATA *data, int converter_type, int channels) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This library contains a number of different sample rate converters,
|
||||||
|
** numbered 0 through N.
|
||||||
|
**
|
||||||
|
** Return a string giving either a name or a more full description of each
|
||||||
|
** sample rate converter or NULL if no sample rate converter exists for
|
||||||
|
** the given value. The converters are sequentially numbered from 0 to N.
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char *src_get_name (int converter_type) ;
|
||||||
|
const char *src_get_description (int converter_type) ;
|
||||||
|
const char *src_get_version (void) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Set a new SRC ratio. This allows step responses
|
||||||
|
** in the conversion ratio.
|
||||||
|
** Returns non zero on error.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_set_ratio (SRC_STATE *state, double new_ratio) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Reset the internal SRC state.
|
||||||
|
** Does not modify the quality settings.
|
||||||
|
** Does not free any memory allocations.
|
||||||
|
** Returns non zero on error.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_reset (SRC_STATE *state) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Return TRUE if ratio is a valid conversion ratio, FALSE
|
||||||
|
** otherwise.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_is_valid_ratio (double ratio) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Return an error number.
|
||||||
|
*/
|
||||||
|
|
||||||
|
int src_error (SRC_STATE *state) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Convert the error number into a string.
|
||||||
|
*/
|
||||||
|
const char* src_strerror (int error) ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** The following enums can be used to set the interpolator type
|
||||||
|
** using the function src_set_converter().
|
||||||
|
*/
|
||||||
|
|
||||||
|
enum
|
||||||
|
{
|
||||||
|
SRC_SINC_BEST_QUALITY = 0,
|
||||||
|
SRC_SINC_MEDIUM_QUALITY = 1,
|
||||||
|
SRC_SINC_FASTEST = 2,
|
||||||
|
SRC_ZERO_ORDER_HOLD = 3,
|
||||||
|
SRC_LINEAR = 4,
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** Extra helper functions for converting from short to float and
|
||||||
|
** back again.
|
||||||
|
*/
|
||||||
|
|
||||||
|
void src_short_to_float_array (const short *in, float *out, int len) ;
|
||||||
|
void src_float_to_short_array (const float *in, short *out, int len) ;
|
||||||
|
|
||||||
|
void src_int_to_float_array (const int *in, float *out, int len) ;
|
||||||
|
void src_float_to_int_array (const float *in, int *out, int len) ;
|
||||||
|
|
||||||
|
|
||||||
|
#ifdef __cplusplus
|
||||||
|
} /* extern "C" */
|
||||||
|
#endif /* __cplusplus */
|
||||||
|
|
||||||
|
#endif /* SAMPLERATE_H */
|
||||||
|
|
||||||
219
source/sound/SRC/src_linear.c
Normal file
219
source/sound/SRC/src_linear.c
Normal file
@ -0,0 +1,219 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "config.h"
|
||||||
|
#include "float_cast.h"
|
||||||
|
#include "common.h"
|
||||||
|
|
||||||
|
static int linear_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data) ;
|
||||||
|
static void linear_reset (SRC_PRIVATE *psrc) ;
|
||||||
|
|
||||||
|
/*========================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define LINEAR_MAGIC_MARKER MAKE_MAGIC ('l', 'i', 'n', 'e', 'a', 'r')
|
||||||
|
|
||||||
|
#define SRC_DEBUG 0
|
||||||
|
|
||||||
|
typedef struct
|
||||||
|
{ int linear_magic_marker ;
|
||||||
|
int channels ;
|
||||||
|
int reset ;
|
||||||
|
long in_count, in_used ;
|
||||||
|
long out_count, out_gen ;
|
||||||
|
float last_value [1] ;
|
||||||
|
} LINEAR_DATA ;
|
||||||
|
|
||||||
|
/*----------------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
linear_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data)
|
||||||
|
{ LINEAR_DATA *linear ;
|
||||||
|
double src_ratio, input_index, rem ;
|
||||||
|
int ch ;
|
||||||
|
|
||||||
|
if (psrc->private_data == NULL)
|
||||||
|
return SRC_ERR_NO_PRIVATE ;
|
||||||
|
|
||||||
|
linear = (LINEAR_DATA*) psrc->private_data ;
|
||||||
|
|
||||||
|
if (linear->reset)
|
||||||
|
{ /* If we have just been reset, set the last_value data. */
|
||||||
|
for (ch = 0 ; ch < linear->channels ; ch++)
|
||||||
|
linear->last_value [ch] = data->data_in [ch] ;
|
||||||
|
linear->reset = 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
linear->in_count = data->input_frames * linear->channels ;
|
||||||
|
linear->out_count = data->output_frames * linear->channels ;
|
||||||
|
linear->in_used = linear->out_gen = 0 ;
|
||||||
|
|
||||||
|
src_ratio = psrc->last_ratio ;
|
||||||
|
input_index = psrc->last_position ;
|
||||||
|
|
||||||
|
/* Calculate samples before first sample in input array. */
|
||||||
|
while (input_index < 1.0 && linear->out_gen < linear->out_count)
|
||||||
|
{
|
||||||
|
if (linear->in_used + linear->channels * input_index > linear->in_count)
|
||||||
|
break ;
|
||||||
|
|
||||||
|
if (linear->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
|
||||||
|
src_ratio = psrc->last_ratio + linear->out_gen * (data->src_ratio - psrc->last_ratio) / linear->out_count ;
|
||||||
|
|
||||||
|
for (ch = 0 ; ch < linear->channels ; ch++)
|
||||||
|
{ data->data_out [linear->out_gen] = (float) (linear->last_value [ch] + input_index *
|
||||||
|
(data->data_in [ch] - linear->last_value [ch])) ;
|
||||||
|
linear->out_gen ++ ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Figure out the next index. */
|
||||||
|
input_index += 1.0 / src_ratio ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
linear->in_used += linear->channels * lrint (input_index - rem) ;
|
||||||
|
input_index = rem ;
|
||||||
|
|
||||||
|
/* Main processing loop. */
|
||||||
|
while (linear->out_gen < linear->out_count && linear->in_used + linear->channels * input_index <= linear->in_count)
|
||||||
|
{
|
||||||
|
if (linear->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
|
||||||
|
src_ratio = psrc->last_ratio + linear->out_gen * (data->src_ratio - psrc->last_ratio) / linear->out_count ;
|
||||||
|
|
||||||
|
if (SRC_DEBUG && linear->in_used < linear->channels && input_index < 1.0)
|
||||||
|
{ printf ("Whoops!!!! in_used : %ld channels : %d input_index : %f\n", linear->in_used, linear->channels, input_index) ;
|
||||||
|
exit (1) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
for (ch = 0 ; ch < linear->channels ; ch++)
|
||||||
|
{ data->data_out [linear->out_gen] = (float) (data->data_in [linear->in_used - linear->channels + ch] + input_index *
|
||||||
|
(data->data_in [linear->in_used + ch] - data->data_in [linear->in_used - linear->channels + ch])) ;
|
||||||
|
linear->out_gen ++ ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Figure out the next index. */
|
||||||
|
input_index += 1.0 / src_ratio ;
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
|
||||||
|
linear->in_used += linear->channels * lrint (input_index - rem) ;
|
||||||
|
input_index = rem ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (linear->in_used > linear->in_count)
|
||||||
|
{ input_index += (linear->in_used - linear->in_count) / linear->channels ;
|
||||||
|
linear->in_used = linear->in_count ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
psrc->last_position = input_index ;
|
||||||
|
|
||||||
|
if (linear->in_used > 0)
|
||||||
|
for (ch = 0 ; ch < linear->channels ; ch++)
|
||||||
|
linear->last_value [ch] = data->data_in [linear->in_used - linear->channels + ch] ;
|
||||||
|
|
||||||
|
/* Save current ratio rather then target ratio. */
|
||||||
|
psrc->last_ratio = src_ratio ;
|
||||||
|
|
||||||
|
data->input_frames_used = linear->in_used / linear->channels ;
|
||||||
|
data->output_frames_gen = linear->out_gen / linear->channels ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* linear_vari_process */
|
||||||
|
|
||||||
|
/*------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char*
|
||||||
|
linear_get_name (int src_enum)
|
||||||
|
{
|
||||||
|
if (src_enum == SRC_LINEAR)
|
||||||
|
return "Linear Interpolator" ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* linear_get_name */
|
||||||
|
|
||||||
|
const char*
|
||||||
|
linear_get_description (int src_enum)
|
||||||
|
{
|
||||||
|
if (src_enum == SRC_LINEAR)
|
||||||
|
return "Linear interpolator, very fast, poor quality." ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* linear_get_descrition */
|
||||||
|
|
||||||
|
int
|
||||||
|
linear_set_converter (SRC_PRIVATE *psrc, int src_enum)
|
||||||
|
{ LINEAR_DATA *linear = NULL ;
|
||||||
|
|
||||||
|
if (src_enum != SRC_LINEAR)
|
||||||
|
return SRC_ERR_BAD_CONVERTER ;
|
||||||
|
|
||||||
|
if (psrc->private_data != NULL)
|
||||||
|
{ linear = (LINEAR_DATA*) psrc->private_data ;
|
||||||
|
if (linear->linear_magic_marker != LINEAR_MAGIC_MARKER)
|
||||||
|
{ free (psrc->private_data) ;
|
||||||
|
psrc->private_data = NULL ;
|
||||||
|
} ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (psrc->private_data == NULL)
|
||||||
|
{ linear = calloc (1, sizeof (*linear) + psrc->channels * sizeof (float)) ;
|
||||||
|
if (linear == NULL)
|
||||||
|
return SRC_ERR_MALLOC_FAILED ;
|
||||||
|
psrc->private_data = linear ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
linear->linear_magic_marker = LINEAR_MAGIC_MARKER ;
|
||||||
|
linear->channels = psrc->channels ;
|
||||||
|
|
||||||
|
psrc->const_process = linear_vari_process ;
|
||||||
|
psrc->vari_process = linear_vari_process ;
|
||||||
|
psrc->reset = linear_reset ;
|
||||||
|
|
||||||
|
linear_reset (psrc) ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* linear_set_converter */
|
||||||
|
|
||||||
|
/*===================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
static void
|
||||||
|
linear_reset (SRC_PRIVATE *psrc)
|
||||||
|
{ LINEAR_DATA *linear = NULL ;
|
||||||
|
|
||||||
|
linear = (LINEAR_DATA*) psrc->private_data ;
|
||||||
|
if (linear == NULL)
|
||||||
|
return ;
|
||||||
|
|
||||||
|
linear->channels = psrc->channels ;
|
||||||
|
linear->reset = 1 ;
|
||||||
|
|
||||||
|
memset (linear->last_value, 0, sizeof (linear->last_value [0]) * linear->channels) ;
|
||||||
|
} /* linear_reset */
|
||||||
|
|
||||||
478
source/sound/SRC/src_sinc.c
Normal file
478
source/sound/SRC/src_sinc.c
Normal file
@ -0,0 +1,478 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "config.h"
|
||||||
|
#include "float_cast.h"
|
||||||
|
#include "common.h"
|
||||||
|
|
||||||
|
#define SINC_MAGIC_MARKER MAKE_MAGIC (' ', 's', 'i', 'n', 'c', ' ')
|
||||||
|
|
||||||
|
/*========================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define MAKE_INCREMENT_T(x) ((increment_t) (x))
|
||||||
|
|
||||||
|
#define SHIFT_BITS 12
|
||||||
|
#define FP_ONE ((double) (((increment_t) 1) << SHIFT_BITS))
|
||||||
|
#define INV_FP_ONE (1.0 / FP_ONE)
|
||||||
|
|
||||||
|
/*========================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
typedef int32_t increment_t ;
|
||||||
|
typedef float coeff_t ;
|
||||||
|
|
||||||
|
#include "fastest_coeffs.h"
|
||||||
|
#ifndef NGC
|
||||||
|
#include "mid_qual_coeffs.h"
|
||||||
|
#include "high_qual_coeffs.h"
|
||||||
|
#endif
|
||||||
|
|
||||||
|
typedef struct
|
||||||
|
{ int sinc_magic_marker ;
|
||||||
|
|
||||||
|
int channels ;
|
||||||
|
long in_count, in_used ;
|
||||||
|
long out_count, out_gen ;
|
||||||
|
|
||||||
|
int coeff_half_len, index_inc ;
|
||||||
|
|
||||||
|
double src_ratio, input_index ;
|
||||||
|
|
||||||
|
coeff_t const *coeffs ;
|
||||||
|
|
||||||
|
int b_current, b_end, b_real_end, b_len ;
|
||||||
|
float buffer [1] ;
|
||||||
|
} SINC_FILTER ;
|
||||||
|
|
||||||
|
static int sinc_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data) ;
|
||||||
|
|
||||||
|
static double calc_output (SINC_FILTER *filter, increment_t increment, increment_t start_filter_index, int ch) ;
|
||||||
|
|
||||||
|
static void prepare_data (SINC_FILTER *filter, SRC_DATA *data, int half_filter_chan_len) ;
|
||||||
|
|
||||||
|
static void sinc_reset (SRC_PRIVATE *psrc) ;
|
||||||
|
|
||||||
|
static inline increment_t
|
||||||
|
double_to_fp (double x)
|
||||||
|
{ if (sizeof (increment_t) == 8)
|
||||||
|
return (llrint ((x) * FP_ONE)) ;
|
||||||
|
return (lrint ((x) * FP_ONE)) ;
|
||||||
|
} /* double_to_fp */
|
||||||
|
|
||||||
|
static inline increment_t
|
||||||
|
int_to_fp (int x)
|
||||||
|
{ return (((increment_t) (x)) << SHIFT_BITS) ;
|
||||||
|
} /* int_to_fp */
|
||||||
|
|
||||||
|
static inline int
|
||||||
|
fp_to_int (increment_t x)
|
||||||
|
{ return (((x) >> SHIFT_BITS)) ;
|
||||||
|
} /* fp_to_int */
|
||||||
|
|
||||||
|
static inline increment_t
|
||||||
|
fp_fraction_part (increment_t x)
|
||||||
|
{ return ((x) & ((((increment_t) 1) << SHIFT_BITS) - 1)) ;
|
||||||
|
} /* fp_fraction_part */
|
||||||
|
|
||||||
|
static inline double
|
||||||
|
fp_to_double (increment_t x)
|
||||||
|
{ return fp_fraction_part (x) * INV_FP_ONE ;
|
||||||
|
} /* fp_to_double */
|
||||||
|
|
||||||
|
|
||||||
|
/*----------------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char*
|
||||||
|
sinc_get_name (int src_enum)
|
||||||
|
{
|
||||||
|
switch (src_enum)
|
||||||
|
{
|
||||||
|
#ifndef NGC
|
||||||
|
case SRC_SINC_BEST_QUALITY :
|
||||||
|
return "Best Sinc Interpolator" ;
|
||||||
|
|
||||||
|
case SRC_SINC_MEDIUM_QUALITY :
|
||||||
|
return "Medium Sinc Interpolator" ;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
case SRC_SINC_FASTEST :
|
||||||
|
return "Fastest Sinc Interpolator" ;
|
||||||
|
|
||||||
|
default: break ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* sinc_get_descrition */
|
||||||
|
|
||||||
|
const char*
|
||||||
|
sinc_get_description (int src_enum)
|
||||||
|
{
|
||||||
|
switch (src_enum)
|
||||||
|
{
|
||||||
|
#ifndef NGC
|
||||||
|
case SRC_SINC_FASTEST :
|
||||||
|
return "Band limited sinc interpolation, fastest, 97dB SNR, 80% BW." ;
|
||||||
|
|
||||||
|
case SRC_SINC_MEDIUM_QUALITY :
|
||||||
|
return "Band limited sinc interpolation, medium quality, 121dB SNR, 90% BW." ;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
case SRC_SINC_BEST_QUALITY :
|
||||||
|
return "Band limited sinc interpolation, best quality, 145dB SNR, 96% BW." ;
|
||||||
|
|
||||||
|
default :
|
||||||
|
break ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* sinc_get_descrition */
|
||||||
|
|
||||||
|
int
|
||||||
|
sinc_set_converter (SRC_PRIVATE *psrc, int src_enum)
|
||||||
|
{ SINC_FILTER *filter, temp_filter ;
|
||||||
|
increment_t count ;
|
||||||
|
int bits ;
|
||||||
|
|
||||||
|
/* Quick sanity check. */
|
||||||
|
if (SHIFT_BITS >= sizeof (increment_t) * 8 - 1)
|
||||||
|
return SRC_ERR_SHIFT_BITS ;
|
||||||
|
|
||||||
|
if (psrc->private_data != NULL)
|
||||||
|
{ filter = (SINC_FILTER*) psrc->private_data ;
|
||||||
|
if (filter->sinc_magic_marker != SINC_MAGIC_MARKER)
|
||||||
|
{ free (psrc->private_data) ;
|
||||||
|
psrc->private_data = NULL ;
|
||||||
|
} ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
memset (&temp_filter, 0, sizeof (temp_filter)) ;
|
||||||
|
|
||||||
|
temp_filter.sinc_magic_marker = SINC_MAGIC_MARKER ;
|
||||||
|
temp_filter.channels = psrc->channels ;
|
||||||
|
|
||||||
|
psrc->const_process = sinc_vari_process ;
|
||||||
|
psrc->vari_process = sinc_vari_process ;
|
||||||
|
psrc->reset = sinc_reset ;
|
||||||
|
|
||||||
|
switch (src_enum)
|
||||||
|
{ case SRC_SINC_FASTEST :
|
||||||
|
temp_filter.coeffs = fastest_coeffs.coeffs ;
|
||||||
|
temp_filter.coeff_half_len = ARRAY_LEN (fastest_coeffs.coeffs) - 1 ;
|
||||||
|
temp_filter.index_inc = fastest_coeffs.increment ;
|
||||||
|
break ;
|
||||||
|
|
||||||
|
#ifndef NGC
|
||||||
|
case SRC_SINC_MEDIUM_QUALITY :
|
||||||
|
temp_filter.coeffs = slow_mid_qual_coeffs.coeffs ;
|
||||||
|
temp_filter.coeff_half_len = ARRAY_LEN (slow_mid_qual_coeffs.coeffs) - 1 ;
|
||||||
|
temp_filter.index_inc = slow_mid_qual_coeffs.increment ;
|
||||||
|
break ;
|
||||||
|
|
||||||
|
case SRC_SINC_BEST_QUALITY :
|
||||||
|
temp_filter.coeffs = slow_high_qual_coeffs.coeffs ;
|
||||||
|
temp_filter.coeff_half_len = ARRAY_LEN (slow_high_qual_coeffs.coeffs) - 1 ;
|
||||||
|
temp_filter.index_inc = slow_high_qual_coeffs.increment ;
|
||||||
|
break ;
|
||||||
|
#endif
|
||||||
|
|
||||||
|
default :
|
||||||
|
return SRC_ERR_BAD_CONVERTER ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/*
|
||||||
|
** FIXME : This needs to be looked at more closely to see if there is
|
||||||
|
** a better way. Need to look at prepare_data () at the same time.
|
||||||
|
*/
|
||||||
|
|
||||||
|
temp_filter.b_len = 2 * lrint (1.0 + temp_filter.coeff_half_len / (temp_filter.index_inc * 1.0) * SRC_MAX_RATIO) ;
|
||||||
|
temp_filter.b_len = MAX (temp_filter.b_len, 4096) ;
|
||||||
|
temp_filter.b_len *= temp_filter.channels ;
|
||||||
|
|
||||||
|
if ((filter = calloc (1, sizeof (SINC_FILTER) + sizeof (filter->buffer [0]) * (temp_filter.b_len + temp_filter.channels))) == NULL)
|
||||||
|
return SRC_ERR_MALLOC_FAILED ;
|
||||||
|
|
||||||
|
*filter = temp_filter ;
|
||||||
|
memset (&temp_filter, 0xEE, sizeof (temp_filter)) ;
|
||||||
|
|
||||||
|
psrc->private_data = filter ;
|
||||||
|
|
||||||
|
sinc_reset (psrc) ;
|
||||||
|
|
||||||
|
count = filter->coeff_half_len ;
|
||||||
|
for (bits = 0 ; (MAKE_INCREMENT_T (1) << bits) < count ; bits++)
|
||||||
|
count |= (MAKE_INCREMENT_T (1) << bits) ;
|
||||||
|
|
||||||
|
if (bits + SHIFT_BITS - 1 >= (int) (sizeof (increment_t) * 8))
|
||||||
|
return SRC_ERR_FILTER_LEN ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* sinc_set_converter */
|
||||||
|
|
||||||
|
static void
|
||||||
|
sinc_reset (SRC_PRIVATE *psrc)
|
||||||
|
{ SINC_FILTER *filter ;
|
||||||
|
|
||||||
|
filter = (SINC_FILTER*) psrc->private_data ;
|
||||||
|
if (filter == NULL)
|
||||||
|
return ;
|
||||||
|
|
||||||
|
filter->b_current = filter->b_end = 0 ;
|
||||||
|
filter->b_real_end = -1 ;
|
||||||
|
|
||||||
|
filter->src_ratio = filter->input_index = 0.0 ;
|
||||||
|
|
||||||
|
memset (filter->buffer, 0, filter->b_len * sizeof (filter->buffer [0])) ;
|
||||||
|
|
||||||
|
/* Set this for a sanity check */
|
||||||
|
memset (filter->buffer + filter->b_len, 0xAA, filter->channels * sizeof (filter->buffer [0])) ;
|
||||||
|
} /* sinc_reset */
|
||||||
|
|
||||||
|
/*========================================================================================
|
||||||
|
** Beware all ye who dare pass this point. There be dragons here.
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
sinc_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data)
|
||||||
|
{ SINC_FILTER *filter ;
|
||||||
|
double input_index, src_ratio, count, float_increment, terminate, rem ;
|
||||||
|
increment_t increment, start_filter_index ;
|
||||||
|
int half_filter_chan_len, samples_in_hand, ch ;
|
||||||
|
|
||||||
|
if (psrc->private_data == NULL)
|
||||||
|
return SRC_ERR_NO_PRIVATE ;
|
||||||
|
|
||||||
|
filter = (SINC_FILTER*) psrc->private_data ;
|
||||||
|
|
||||||
|
/* If there is not a problem, this will be optimised out. */
|
||||||
|
if (sizeof (filter->buffer [0]) != sizeof (data->data_in [0]))
|
||||||
|
return SRC_ERR_SIZE_INCOMPATIBILITY ;
|
||||||
|
|
||||||
|
filter->in_count = data->input_frames * filter->channels ;
|
||||||
|
filter->out_count = data->output_frames * filter->channels ;
|
||||||
|
filter->in_used = filter->out_gen = 0 ;
|
||||||
|
|
||||||
|
src_ratio = psrc->last_ratio ;
|
||||||
|
|
||||||
|
/* Check the sample rate ratio wrt the buffer len. */
|
||||||
|
count = (filter->coeff_half_len + 2.0) / filter->index_inc ;
|
||||||
|
if (MIN (psrc->last_ratio, data->src_ratio) < 1.0)
|
||||||
|
count /= MIN (psrc->last_ratio, data->src_ratio) ;
|
||||||
|
|
||||||
|
/* Maximum coefficientson either side of center point. */
|
||||||
|
half_filter_chan_len = filter->channels * (lrint (count) + 1) ;
|
||||||
|
|
||||||
|
input_index = psrc->last_position ;
|
||||||
|
float_increment = filter->index_inc ;
|
||||||
|
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
filter->b_current = (filter->b_current + filter->channels * lrint (input_index - rem)) % filter->b_len ;
|
||||||
|
input_index = rem ;
|
||||||
|
|
||||||
|
terminate = 1.0 / src_ratio + 1e-20 ;
|
||||||
|
|
||||||
|
/* Main processing loop. */
|
||||||
|
while (filter->out_gen < filter->out_count)
|
||||||
|
{
|
||||||
|
/* Need to reload buffer? */
|
||||||
|
samples_in_hand = (filter->b_end - filter->b_current + filter->b_len) % filter->b_len ;
|
||||||
|
|
||||||
|
if (samples_in_hand <= half_filter_chan_len)
|
||||||
|
{ prepare_data (filter, data, half_filter_chan_len) ;
|
||||||
|
|
||||||
|
samples_in_hand = (filter->b_end - filter->b_current + filter->b_len) % filter->b_len ;
|
||||||
|
if (samples_in_hand <= half_filter_chan_len)
|
||||||
|
break ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* This is the termination condition. */
|
||||||
|
if (filter->b_real_end >= 0)
|
||||||
|
{ if (filter->b_current + input_index + terminate >= filter->b_real_end)
|
||||||
|
break ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (filter->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > 1e-10)
|
||||||
|
src_ratio = psrc->last_ratio + filter->out_gen * (data->src_ratio - psrc->last_ratio) / filter->out_count ;
|
||||||
|
|
||||||
|
float_increment = filter->index_inc * 1.0 ;
|
||||||
|
if (src_ratio < 1.0)
|
||||||
|
float_increment = filter->index_inc * src_ratio ;
|
||||||
|
|
||||||
|
increment = double_to_fp (float_increment) ;
|
||||||
|
|
||||||
|
start_filter_index = double_to_fp (input_index * float_increment) ;
|
||||||
|
|
||||||
|
for (ch = 0 ; ch < filter->channels ; ch++)
|
||||||
|
{ data->data_out [filter->out_gen] = (float) ((float_increment / filter->index_inc) *
|
||||||
|
calc_output (filter, increment, start_filter_index, ch)) ;
|
||||||
|
filter->out_gen ++ ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Figure out the next index. */
|
||||||
|
input_index += 1.0 / src_ratio ;
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
|
||||||
|
filter->b_current = (filter->b_current + filter->channels * lrint (input_index - rem)) % filter->b_len ;
|
||||||
|
input_index = rem ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
psrc->last_position = input_index ;
|
||||||
|
|
||||||
|
/* Save current ratio rather then target ratio. */
|
||||||
|
psrc->last_ratio = src_ratio ;
|
||||||
|
|
||||||
|
data->input_frames_used = filter->in_used / filter->channels ;
|
||||||
|
data->output_frames_gen = filter->out_gen / filter->channels ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* sinc_vari_process */
|
||||||
|
|
||||||
|
/*----------------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
static void
|
||||||
|
prepare_data (SINC_FILTER *filter, SRC_DATA *data, int half_filter_chan_len)
|
||||||
|
{ int len = 0 ;
|
||||||
|
|
||||||
|
if (filter->b_real_end >= 0)
|
||||||
|
return ; /* This doesn't make sense, so return. */
|
||||||
|
|
||||||
|
if (filter->b_current == 0)
|
||||||
|
{ /* Initial state. Set up zeros at the start of the buffer and
|
||||||
|
** then load new data after that.
|
||||||
|
*/
|
||||||
|
len = filter->b_len - 2 * half_filter_chan_len ;
|
||||||
|
|
||||||
|
filter->b_current = filter->b_end = half_filter_chan_len ;
|
||||||
|
}
|
||||||
|
else if (filter->b_end + half_filter_chan_len + filter->channels < filter->b_len)
|
||||||
|
{ /* Load data at current end position. */
|
||||||
|
len = MAX (filter->b_len - filter->b_current - half_filter_chan_len, 0) ;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
{ /* Move data at end of buffer back to the start of the buffer. */
|
||||||
|
len = filter->b_end - filter->b_current ;
|
||||||
|
memmove (filter->buffer, filter->buffer + filter->b_current - half_filter_chan_len,
|
||||||
|
(half_filter_chan_len + len) * sizeof (filter->buffer [0])) ;
|
||||||
|
|
||||||
|
filter->b_current = half_filter_chan_len ;
|
||||||
|
filter->b_end = filter->b_current + len ;
|
||||||
|
|
||||||
|
/* Now load data at current end of buffer. */
|
||||||
|
len = MAX (filter->b_len - filter->b_current - half_filter_chan_len, 0) ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
len = MIN (filter->in_count - filter->in_used, len) ;
|
||||||
|
len -= (len % filter->channels) ;
|
||||||
|
|
||||||
|
memcpy (filter->buffer + filter->b_end, data->data_in + filter->in_used,
|
||||||
|
len * sizeof (filter->buffer [0])) ;
|
||||||
|
|
||||||
|
filter->b_end += len ;
|
||||||
|
filter->in_used += len ;
|
||||||
|
|
||||||
|
if (filter->in_used == filter->in_count &&
|
||||||
|
filter->b_end - filter->b_current < 2 * half_filter_chan_len && data->end_of_input)
|
||||||
|
{ /* Handle the case where all data in the current buffer has been
|
||||||
|
** consumed and this is the last buffer.
|
||||||
|
*/
|
||||||
|
|
||||||
|
if (filter->b_len - filter->b_end < half_filter_chan_len + 5)
|
||||||
|
{ /* If necessary, move data down to the start of the buffer. */
|
||||||
|
len = filter->b_end - filter->b_current ;
|
||||||
|
memmove (filter->buffer, filter->buffer + filter->b_current - half_filter_chan_len,
|
||||||
|
(half_filter_chan_len + len) * sizeof (filter->buffer [0])) ;
|
||||||
|
|
||||||
|
filter->b_current = half_filter_chan_len ;
|
||||||
|
filter->b_end = filter->b_current + len ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
filter->b_real_end = filter->b_end ;
|
||||||
|
len = half_filter_chan_len + 5 ;
|
||||||
|
|
||||||
|
memset (filter->buffer + filter->b_end, 0, len * sizeof (filter->buffer [0])) ;
|
||||||
|
filter->b_end += len ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
return ;
|
||||||
|
} /* prepare_data */
|
||||||
|
|
||||||
|
|
||||||
|
static double
|
||||||
|
calc_output (SINC_FILTER *filter, increment_t increment, increment_t start_filter_index, int ch)
|
||||||
|
{ double fraction, left, right, icoeff ;
|
||||||
|
increment_t filter_index, max_filter_index ;
|
||||||
|
int data_index, coeff_count, indx ;
|
||||||
|
|
||||||
|
/* Convert input parameters into fixed point. */
|
||||||
|
max_filter_index = int_to_fp (filter->coeff_half_len) ;
|
||||||
|
|
||||||
|
/* First apply the left half of the filter. */
|
||||||
|
filter_index = start_filter_index ;
|
||||||
|
coeff_count = (max_filter_index - filter_index) / increment ;
|
||||||
|
filter_index = filter_index + coeff_count * increment ;
|
||||||
|
data_index = filter->b_current - filter->channels * coeff_count + ch ;
|
||||||
|
|
||||||
|
left = 0.0 ;
|
||||||
|
do
|
||||||
|
{ fraction = fp_to_double (filter_index) ;
|
||||||
|
indx = fp_to_int (filter_index) ;
|
||||||
|
|
||||||
|
icoeff = filter->coeffs [indx] + fraction * (filter->coeffs [indx + 1] - filter->coeffs [indx]) ;
|
||||||
|
|
||||||
|
left += icoeff * filter->buffer [data_index] ;
|
||||||
|
|
||||||
|
filter_index -= increment ;
|
||||||
|
data_index = data_index + filter->channels ;
|
||||||
|
}
|
||||||
|
while (filter_index >= MAKE_INCREMENT_T (0)) ;
|
||||||
|
|
||||||
|
/* Now apply the right half of the filter. */
|
||||||
|
filter_index = increment - start_filter_index ;
|
||||||
|
coeff_count = (max_filter_index - filter_index) / increment ;
|
||||||
|
filter_index = filter_index + coeff_count * increment ;
|
||||||
|
data_index = filter->b_current + filter->channels * (1 + coeff_count) + ch ;
|
||||||
|
|
||||||
|
right = 0.0 ;
|
||||||
|
do
|
||||||
|
{ fraction = fp_to_double (filter_index) ;
|
||||||
|
indx = fp_to_int (filter_index) ;
|
||||||
|
|
||||||
|
icoeff = filter->coeffs [indx] + fraction * (filter->coeffs [indx + 1] - filter->coeffs [indx]) ;
|
||||||
|
|
||||||
|
right += icoeff * filter->buffer [data_index] ;
|
||||||
|
|
||||||
|
filter_index -= increment ;
|
||||||
|
data_index = data_index - filter->channels ;
|
||||||
|
}
|
||||||
|
while (filter_index > MAKE_INCREMENT_T (0)) ;
|
||||||
|
|
||||||
|
return (left + right) ;
|
||||||
|
} /* calc_output */
|
||||||
|
|
||||||
211
source/sound/SRC/src_zoh.c
Normal file
211
source/sound/SRC/src_zoh.c
Normal file
@ -0,0 +1,211 @@
|
|||||||
|
/*
|
||||||
|
** Copyright (C) 2002-2008 Erik de Castro Lopo <erikd@mega-nerd.com>
|
||||||
|
**
|
||||||
|
** This program is free software; you can redistribute it and/or modify
|
||||||
|
** it under the terms of the GNU General Public License as published by
|
||||||
|
** the Free Software Foundation; either version 2 of the License, or
|
||||||
|
** (at your option) any later version.
|
||||||
|
**
|
||||||
|
** This program is distributed in the hope that it will be useful,
|
||||||
|
** but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||||
|
** GNU General Public License for more details.
|
||||||
|
**
|
||||||
|
** You should have received a copy of the GNU General Public License
|
||||||
|
** along with this program; if not, write to the Free Software
|
||||||
|
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
** This code is part of Secret Rabibt Code aka libsamplerate. A commercial
|
||||||
|
** use license for this code is available, please see:
|
||||||
|
** http://www.mega-nerd.com/SRC/procedure.html
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h>
|
||||||
|
#include <string.h>
|
||||||
|
|
||||||
|
#include "config.h"
|
||||||
|
#include "float_cast.h"
|
||||||
|
#include "common.h"
|
||||||
|
|
||||||
|
static int zoh_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data) ;
|
||||||
|
static void zoh_reset (SRC_PRIVATE *psrc) ;
|
||||||
|
|
||||||
|
/*========================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
#define ZOH_MAGIC_MARKER MAKE_MAGIC ('s', 'r', 'c', 'z', 'o', 'h')
|
||||||
|
|
||||||
|
typedef struct
|
||||||
|
{ int zoh_magic_marker ;
|
||||||
|
int channels ;
|
||||||
|
int reset ;
|
||||||
|
long in_count, in_used ;
|
||||||
|
long out_count, out_gen ;
|
||||||
|
float last_value [1] ;
|
||||||
|
} ZOH_DATA ;
|
||||||
|
|
||||||
|
/*----------------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
static int
|
||||||
|
zoh_vari_process (SRC_PRIVATE *psrc, SRC_DATA *data)
|
||||||
|
{ ZOH_DATA *zoh ;
|
||||||
|
double src_ratio, input_index, rem ;
|
||||||
|
int ch ;
|
||||||
|
|
||||||
|
if (psrc->private_data == NULL)
|
||||||
|
return SRC_ERR_NO_PRIVATE ;
|
||||||
|
|
||||||
|
zoh = (ZOH_DATA*) psrc->private_data ;
|
||||||
|
|
||||||
|
if (zoh->reset)
|
||||||
|
{ /* If we have just been reset, set the last_value data. */
|
||||||
|
for (ch = 0 ; ch < zoh->channels ; ch++)
|
||||||
|
zoh->last_value [ch] = data->data_in [ch] ;
|
||||||
|
zoh->reset = 0 ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
zoh->in_count = data->input_frames * zoh->channels ;
|
||||||
|
zoh->out_count = data->output_frames * zoh->channels ;
|
||||||
|
zoh->in_used = zoh->out_gen = 0 ;
|
||||||
|
|
||||||
|
src_ratio = psrc->last_ratio ;
|
||||||
|
input_index = psrc->last_position ;
|
||||||
|
|
||||||
|
/* Calculate samples before first sample in input array. */
|
||||||
|
while (input_index < 1.0 && zoh->out_gen < zoh->out_count)
|
||||||
|
{
|
||||||
|
if (zoh->in_used + zoh->channels * input_index >= zoh->in_count)
|
||||||
|
break ;
|
||||||
|
|
||||||
|
if (zoh->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
|
||||||
|
src_ratio = psrc->last_ratio + zoh->out_gen * (data->src_ratio - psrc->last_ratio) / zoh->out_count ;
|
||||||
|
|
||||||
|
for (ch = 0 ; ch < zoh->channels ; ch++)
|
||||||
|
{ data->data_out [zoh->out_gen] = zoh->last_value [ch] ;
|
||||||
|
zoh->out_gen ++ ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Figure out the next index. */
|
||||||
|
input_index += 1.0 / src_ratio ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
zoh->in_used += zoh->channels * lrint (input_index - rem) ;
|
||||||
|
input_index = rem ;
|
||||||
|
|
||||||
|
/* Main processing loop. */
|
||||||
|
while (zoh->out_gen < zoh->out_count && zoh->in_used + zoh->channels * input_index <= zoh->in_count)
|
||||||
|
{
|
||||||
|
if (zoh->out_count > 0 && fabs (psrc->last_ratio - data->src_ratio) > SRC_MIN_RATIO_DIFF)
|
||||||
|
src_ratio = psrc->last_ratio + zoh->out_gen * (data->src_ratio - psrc->last_ratio) / zoh->out_count ;
|
||||||
|
|
||||||
|
for (ch = 0 ; ch < zoh->channels ; ch++)
|
||||||
|
{ data->data_out [zoh->out_gen] = data->data_in [zoh->in_used - zoh->channels + ch] ;
|
||||||
|
zoh->out_gen ++ ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
/* Figure out the next index. */
|
||||||
|
input_index += 1.0 / src_ratio ;
|
||||||
|
rem = fmod_one (input_index) ;
|
||||||
|
|
||||||
|
zoh->in_used += zoh->channels * lrint (input_index - rem) ;
|
||||||
|
input_index = rem ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (zoh->in_used > zoh->in_count)
|
||||||
|
{ input_index += (zoh->in_used - zoh->in_count) / zoh->channels ;
|
||||||
|
zoh->in_used = zoh->in_count ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
psrc->last_position = input_index ;
|
||||||
|
|
||||||
|
if (zoh->in_used > 0)
|
||||||
|
for (ch = 0 ; ch < zoh->channels ; ch++)
|
||||||
|
zoh->last_value [ch] = data->data_in [zoh->in_used - zoh->channels + ch] ;
|
||||||
|
|
||||||
|
/* Save current ratio rather then target ratio. */
|
||||||
|
psrc->last_ratio = src_ratio ;
|
||||||
|
|
||||||
|
data->input_frames_used = zoh->in_used / zoh->channels ;
|
||||||
|
data->output_frames_gen = zoh->out_gen / zoh->channels ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* zoh_vari_process */
|
||||||
|
|
||||||
|
/*------------------------------------------------------------------------------
|
||||||
|
*/
|
||||||
|
|
||||||
|
const char*
|
||||||
|
zoh_get_name (int src_enum)
|
||||||
|
{
|
||||||
|
if (src_enum == SRC_ZERO_ORDER_HOLD)
|
||||||
|
return "ZOH Interpolator" ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* zoh_get_name */
|
||||||
|
|
||||||
|
const char*
|
||||||
|
zoh_get_description (int src_enum)
|
||||||
|
{
|
||||||
|
if (src_enum == SRC_ZERO_ORDER_HOLD)
|
||||||
|
return "Zero order hold interpolator, very fast, poor quality." ;
|
||||||
|
|
||||||
|
return NULL ;
|
||||||
|
} /* zoh_get_descrition */
|
||||||
|
|
||||||
|
int
|
||||||
|
zoh_set_converter (SRC_PRIVATE *psrc, int src_enum)
|
||||||
|
{ ZOH_DATA *zoh = NULL ;
|
||||||
|
|
||||||
|
if (src_enum != SRC_ZERO_ORDER_HOLD)
|
||||||
|
return SRC_ERR_BAD_CONVERTER ;
|
||||||
|
|
||||||
|
if (psrc->private_data != NULL)
|
||||||
|
{ zoh = (ZOH_DATA*) psrc->private_data ;
|
||||||
|
if (zoh->zoh_magic_marker != ZOH_MAGIC_MARKER)
|
||||||
|
{ free (psrc->private_data) ;
|
||||||
|
psrc->private_data = NULL ;
|
||||||
|
} ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
if (psrc->private_data == NULL)
|
||||||
|
{ zoh = calloc (1, sizeof (*zoh) + psrc->channels * sizeof (float)) ;
|
||||||
|
if (zoh == NULL)
|
||||||
|
return SRC_ERR_MALLOC_FAILED ;
|
||||||
|
psrc->private_data = zoh ;
|
||||||
|
} ;
|
||||||
|
|
||||||
|
zoh->zoh_magic_marker = ZOH_MAGIC_MARKER ;
|
||||||
|
zoh->channels = psrc->channels ;
|
||||||
|
|
||||||
|
psrc->const_process = zoh_vari_process ;
|
||||||
|
psrc->vari_process = zoh_vari_process ;
|
||||||
|
psrc->reset = zoh_reset ;
|
||||||
|
|
||||||
|
zoh_reset (psrc) ;
|
||||||
|
|
||||||
|
return SRC_ERR_NO_ERROR ;
|
||||||
|
} /* zoh_set_converter */
|
||||||
|
|
||||||
|
/*===================================================================================
|
||||||
|
*/
|
||||||
|
|
||||||
|
static void
|
||||||
|
zoh_reset (SRC_PRIVATE *psrc)
|
||||||
|
{ ZOH_DATA *zoh ;
|
||||||
|
|
||||||
|
zoh = (ZOH_DATA*) psrc->private_data ;
|
||||||
|
if (zoh == NULL)
|
||||||
|
return ;
|
||||||
|
|
||||||
|
zoh->channels = psrc->channels ;
|
||||||
|
zoh->reset = 1 ;
|
||||||
|
memset (zoh->last_value, 0, sizeof (zoh->last_value [0]) * zoh->channels) ;
|
||||||
|
|
||||||
|
return ;
|
||||||
|
} /* zoh_reset */
|
||||||
|
|
||||||
Loading…
Reference in New Issue
Block a user