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fixed audio/video synchronization in interlaced & progressive modes

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This commit is contained in:
ekeeke31 2010-08-08 18:09:37 +00:00
parent cd14774e03
commit 54f1b14aa9
7 changed files with 147 additions and 67 deletions
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40
source/gx/gui/menu.c
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@ -988,7 +988,7 @@ static void systemmenu ()
switch (ret)
{
case 0: /*** Region Force ***/
case 0: /*** Force Region ***/
config.region_detect = (config.region_detect + 1) % 4;
if (config.region_detect == 0)
sprintf (items[0].text, "Console Region: AUTO");
@ -1004,18 +1004,13 @@ static void systemmenu ()
/* reset console region */
region_autodetect();
/* update framerate */
if (vdp_pal)
framerate = 50.0;
else
framerate = ((config.tv_mode == 0) || (config.tv_mode == 2)) ? (1000000.0/16715.0) : 60.0;
/* save YM2612 context */
temp = memalign(32,YM2612GetContextSize());
if (temp)
memcpy(temp, YM2612GetContextPtr(), YM2612GetContextSize());
/* reinitialize all timings */
framerate = vdp_pal ? 50.0 : ((config.tv_mode == 1) ? 60.0 : ((config.render || interlaced) ? 59.94 : (1000000.0/16715.0)));
audio_init(snd.sample_rate, framerate);
system_init();
@ -1212,6 +1207,27 @@ static void videomenu ()
config.render = 0;
}
}
if (!vdp_pal && cart.romsize)
{
/* save YM2612 context */
temp = memalign(32,YM2612GetContextSize());
if (temp)
memcpy(temp, YM2612GetContextPtr(), YM2612GetContextSize());
/* reinitialize audio timings */
framerate = (config.tv_mode == 1) ? 60.0 : ((config.render || interlaced) ? 59.94 : (1000000.0/16715.0));
audio_init(snd.sample_rate, framerate);
sound_init();
/* restore YM2612 context */
if (temp)
{
YM2612Restore(temp);
free(temp);
}
}
if (config.render == 1)
sprintf (items[0].text,"Display: INTERLACED");
else if (config.render == 2)
@ -1225,18 +1241,15 @@ static void videomenu ()
{
config.tv_mode = (config.tv_mode + 1) % 3;
/* update framerate */
if (vdp_pal)
framerate = 50.0;
else
framerate = ((config.tv_mode == 0) || (config.tv_mode == 2)) ? (1000000.0/16715.0) : 60.0;
if (!vdp_pal && cart.romsize)
{
/* save YM2612 context */
temp = memalign(32,YM2612GetContextSize());
if (temp)
memcpy(temp, YM2612GetContextPtr(), YM2612GetContextSize());
/* reinitialize audio timings */
framerate = (config.tv_mode == 1) ? 60.0 : ((config.render || interlaced) ? 59.94 : (1000000.0/16715.0));
audio_init(snd.sample_rate, framerate);
sound_init();
@ -1246,6 +1259,7 @@ static void videomenu ()
YM2612Restore(temp);
free(temp);
}
}
if (config.tv_mode == 0)
sprintf (items[1].text, "TV Mode: 60HZ");

24
source/gx/gx_audio.c
View File

@ -71,7 +71,10 @@ void gx_audio_Init(void)
stat(fname, &filestat);
Bg_music_ogg_size = filestat.st_size;
Bg_music_ogg = memalign(32,Bg_music_ogg_size);
if (Bg_music_ogg) fread(Bg_music_ogg,1,Bg_music_ogg_size,f);
if (Bg_music_ogg)
{
fread(Bg_music_ogg,1,Bg_music_ogg_size,f);
}
fclose(f);
}
}
@ -84,7 +87,9 @@ void gx_audio_Shutdown(void)
ASND_Pause(1);
ASND_End();
if (Bg_music_ogg)
{
free(Bg_music_ogg);
}
}
/***
@ -111,23 +116,18 @@ void gx_audio_Update(void)
/* Therefore we need to make sure frame emulation is completed before current DMA is */
/* completed, either by synchronizing frame emulation with DMA start or by syncing it */
/* with Vertical Interrupt and outputing a suitable number of samples per frame. */
/* In 60hz mode, VSYNC period is actually 16715 ms which is 802.32 samples at 48kHz. */
/* */
/* In both cases, audio DMA need to be synchronized with VSYNC and therefore need to */
/* be resynchronized (restarted) every time video settings are changed (hopefully, */
/* this generally happens while no music is played. */
if (!audioStarted)
{
audioStarted = 1;
/* when not using 60hz mode, frame emulation is synchronized with Audio Interface DMA */
if (gc_pal | vdp_pal)
AUDIO_RegisterDMACallback(ai_callback);
/* restart audio DMA */
AUDIO_StopDMA();
AUDIO_StartDMA();
if (frameticker > 1)
audioStarted = 1;
/* resynchronize emulation */
frameticker = 1;
}
}
@ -150,6 +150,12 @@ void gx_audio_Start(void)
AUDIO_RegisterDMACallback(NULL);
DSP_Halt();
/* when not using 60hz mode, frame emulation is synchronized with Audio Interface DMA */
if (gc_pal | vdp_pal)
{
AUDIO_RegisterDMACallback(ai_callback);
}
/* reset emulation audio processing */
memset(soundbuffer, 0, 2 * 3840);
audioStarted = 0;

50
source/gx/gx_video.c
View File

@ -1306,9 +1306,13 @@ void gx_video_Start(void)
{
/* 50Hz/60Hz mode */
if ((config.tv_mode == 1) || ((config.tv_mode == 2) && vdp_pal))
{
gc_pal = 1;
}
else
{
gc_pal = 0;
}
#ifdef HW_RVL
VIDEO_SetTrapFilter(config.trap);
@ -1318,7 +1322,9 @@ void gx_video_Start(void)
/* VSYNC callbacks */
/* in 60hz mode, frame emulation is synchronized with Video Interrupt */
if (!gc_pal && !vdp_pal)
{
VIDEO_SetPreRetraceCallback(vi_callback);
}
VIDEO_SetPostRetraceCallback(NULL);
VIDEO_Flush();
@ -1342,9 +1348,13 @@ void gx_video_Start(void)
{
/* allocate filters */
if (!sms_ntsc)
{
sms_ntsc = (sms_ntsc_t *)memalign(32,sizeof(sms_ntsc_t));
}
if (!md_ntsc)
{
md_ntsc = (md_ntsc_t *)memalign(32,sizeof(md_ntsc_t));
}
/* setup filters default configuration */
switch (config.ntsc)
@ -1366,9 +1376,13 @@ void gx_video_Start(void)
/* lightgun textures */
if (config.gun_cursor[0] && (input.dev[4] == DEVICE_LIGHTGUN))
{
crosshair[0] = gxTextureOpenPNG(Crosshair_p1_png,0);
}
if (config.gun_cursor[1] && (input.dev[5] == DEVICE_LIGHTGUN))
{
crosshair[1] = gxTextureOpenPNG(Crosshair_p2_png,0);
}
/* GX emulation rendering */
gxResetRendering(0);
@ -1382,7 +1396,7 @@ void gx_video_Update(void)
{
int update = bitmap.viewport.changed & 1;
/* check if display has changed */
/* check if display has changed during frame */
if (update)
{
/* update texture size */
@ -1391,11 +1405,15 @@ void gx_video_Update(void)
/* interlaced mode */
if (config.render && interlaced)
{
vheight = vheight << 1;
}
/* ntsc filter */
if (config.ntsc)
{
vwidth = (reg[12] & 1) ? MD_NTSC_OUT_WIDTH(vwidth) : SMS_NTSC_OUT_WIDTH(vwidth);
}
/* texels size must be multiple of 4 */
vwidth = (vwidth >> 2) << 2;
@ -1407,16 +1425,22 @@ void gx_video_Update(void)
/* configure texture filtering */
if (!config.bilinear)
{
GX_InitTexObjLOD(&texobj,GX_NEAR,GX_NEAR_MIP_NEAR,0.0,10.0,0.0,GX_FALSE,GX_FALSE,GX_ANISO_1);
}
/* load texture object */
GX_LoadTexObj(&texobj, GX_TEXMAP0);
/* update TV mode */
/* update rendering mode */
if (config.render)
{
rmode = tvmodes[gc_pal*3 + 2];
}
else
{
rmode = tvmodes[gc_pal*3 + interlaced];
}
/* update aspect ratio */
gxResetScaler(vwidth);
@ -1426,7 +1450,6 @@ void gx_video_Update(void)
/* update VI mode */
VIDEO_Configure(rmode);
VIDEO_Flush();
}
/* texture is now directly mapped by the line renderer */
@ -1438,11 +1461,15 @@ void gx_video_Update(void)
/* render textured quad */
draw_square();
/* LightGun marks */
/* Lightgun marks */
if (crosshair[0])
{
gxDrawCrosshair(crosshair[0], input.analog[0][0],input.analog[0][1]);
}
if (crosshair[1])
{
gxDrawCrosshair(crosshair[1], input.analog[1][0],input.analog[1][1]);
}
/* swap XFB */
whichfb ^= 1;
@ -1451,24 +1478,29 @@ void gx_video_Update(void)
GX_DrawDone();
GX_CopyDisp(xfb[whichfb], GX_TRUE);
GX_Flush();
/* XFB is ready to be displayed */
VIDEO_SetNextFramebuffer(xfb[whichfb]);
VIDEO_Flush();
if (update)
{
/* Clear update flags */
bitmap.viewport.changed &= ~1;
/* field synchronization */
VIDEO_WaitVSync();
if (rmode->viTVMode & VI_NON_INTERLACE)
{
VIDEO_WaitVSync();
}
else while (VIDEO_GetNextField() != odd_frame)
{
VIDEO_WaitVSync();
if (frameticker > 1)
frameticker = 1;
}
/* force audio DMA resynchronization */
/* audio & video resynchronization */
audioStarted = 0;
bitmap.viewport.changed &= ~1;
}
}

46
source/gx/main.c
View File

@ -105,7 +105,7 @@ static bool FindIOS(u32 ios)
***************************************************************************/
static void load_bios(void)
{
/* reset BIOS flag */
/* clear BIOS detection flag */
config.tmss &= ~2;
/* open BIOS file */
@ -116,8 +116,12 @@ static void load_bios(void)
fread(bios_rom, 1, 0x800, fp);
fclose(fp);
/* update BIOS flags */
/* check ROM file */
if (!strncmp((char *)(bios_rom + 0x120),"GENESIS OS", 10))
{
/* valid BIOS detected */
config.tmss |= 2;
}
}
static void init_machine(void)
@ -173,8 +177,8 @@ static void run_emulation(void)
ConfigRequested = 0;
/* start video & audio */
gx_audio_Start();
gx_video_Start();
gx_audio_Start();
frameticker = 1;
}
@ -182,8 +186,8 @@ static void run_emulation(void)
if (frameticker > 1)
{
/* skip frame */
frameticker = 0;
system_frame(1);
frameticker = 1;
}
else
{
@ -198,6 +202,32 @@ static void run_emulation(void)
/* update audio */
gx_audio_Update();
/* check interlaced mode change */
if (bitmap.viewport.changed & 4)
{
/* in original 60hz modes, audio is synced with framerate */
if (!config.render && !vdp_pal && (config.tv_mode != 1))
{
u8 *temp = memalign(32,YM2612GetContextSize());
if (temp)
{
/* save YM2612 context */
memcpy(temp, YM2612GetContextPtr(), YM2612GetContextSize());
/* framerate has changed, reinitialize audio timings */
audio_init(48000, interlaced ? 59.94 : (1000000.0/16715.0));
sound_init();
/* restore YM2612 context */
YM2612Restore(temp);
free(temp);
}
}
/* clear flag */
bitmap.viewport.changed &= ~4;
}
/* wait for next frame */
while (frameticker < 1)
usleep(1);
@ -227,12 +257,8 @@ void reloadrom (int size, char *name)
{
/* initialize audio back-end */
/* 60hz video mode requires synchronization with Video Interrupt. */
/* VSYNC period is 16715 us on Wii/Gamecube (approx. 802.32 samples per frame) */
float framerate;
if (vdp_pal)
framerate = 50.0;
else
framerate = ((config.tv_mode == 0) || (config.tv_mode == 2)) ? (1000000.0/16715.0) : 60.0;
/* Framerate is 59.94 fps in interlaced/progressive modes, ~59.825 fps in non-interlaced mode */
float framerate = vdp_pal ? 50.0 : ((config.tv_mode == 1) ? 60.0 : (config.render ? 59.94 : (1000000.0/16715.0)));
audio_init(48000, framerate);
/* System Power ON */

1
source/sound/sn76489.c
View File

@ -114,7 +114,6 @@ void SN76489_Init(float PSGClockValue, int SamplingRate)
SN76489_Context *p = &SN76489;
p->dClock=PSGClockValue/16.0/SamplingRate;
SN76489_Config(MUTE_ALLON, VOL_FULL, FB_SEGAVDP, SRW_SEGAVDP, config.psgBoostNoise);
SN76489_Reset();
}
void SN76489_Reset(void)

15
source/sound/sound.c
View File

@ -178,17 +178,20 @@ int sound_update(unsigned int cycles)
int avail = Fir_Resampler_avail();
/* resynchronize FM & PSG chips */
if (avail < size)
if (avail > size)
{
/* FM chip is ahead */
fm_cycles_count += (avail - size) * psg_cycles_ratio;
}
else
{
while (avail < size)
{
/* FM chip is late for one sample */
YM2612Update(Fir_Resampler_buffer(), 1);
Fir_Resampler_write(2);
fm_cycles_count += fm_cycles_ratio;
avail = Fir_Resampler_avail();
}
else
{
/* FM chip is ahead */
fm_cycles_count += (avail - size) * psg_cycles_ratio;
}
}

2
source/system.c
View File

@ -334,7 +334,7 @@ void system_frame (int do_skip)
{
im2_flag = ((reg[12] & 6) == 6);
odd_frame = 1;
bitmap.viewport.changed = 1;
bitmap.viewport.changed = 5;
}
/* active screen height */