usbloadergx/source/libwiigui/gui_sound_decoder_ogg.cpp

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/****************************************************************************
* libwiigui
*
* Tantric 2009
*
* gui_sound_plugin_ogg.cpp
*
* by ardi 2009
*
* Decoder for ogg-vorbis with libtremor
*
* GUI class definitions
***************************************************************************/
#include <unistd.h>
#include <asndlib.h>
#include <tremor/ivorbiscodec.h>
#include <tremor/ivorbisfile.h>
#include <string.h>
#include "gui_sound_decoder.h"
/* functions to read the Ogg file from memory */
static struct
{
char *mem;
int size;
int pos;
} file[4];
static int f_read(void * punt, int bytes, int blocks, int *f)
{
int b;
int c = 0;
int d;
if (bytes * blocks <= 0)
return 0;
blocks *= bytes;
while (blocks > 0)
{
b = blocks;
if (b > 4096)
b = 4096;
d = (*f) - 0x666;
if((unsigned)(d) <= (0x669 - 0x666))
{
if (file[d].size == 0)
return -1;
if ((file[d].pos + b) > file[d].size)
b = file[d].size - file[d].pos;
if (b > 0)
{
memcpy(punt, file[d].mem + file[d].pos, b);
file[d].pos += b;
}
}
else
b = read(*f, ((char *) punt) + c, b);
if (b <= 0)
{
return c / bytes;
}
c += b;
blocks -= b;
}
return c / bytes;
}
static int f_seek(int *f, ogg_int64_t offset, int mode)
{
if(f==NULL) return(-1);
int k;
mode &= 3;
int d = (*f) - 0x666;
if((unsigned)(d) <= (0x669 - 0x666))
{
k = 0;
if (file[d].size == 0)
return -1;
if (mode == 0)
{
if ((offset) >= file[d].size)
{
file[d].pos = file[d].size;
k = -1;
}
else if ((offset) < 0)
{
file[d].pos = 0;
k = -1;
}
else
file[d].pos = offset;
}
else if (mode == 1)
{
if ((file[d].pos + offset) >= file[d].size)
{
file[d].pos = file[d].size;
k = -1;
}
else if ((file[d].pos + offset) < 0)
{
file[d].pos = 0;
k = -1;
}
else
file[d].pos += offset;
}
else if (mode == 2)
{
if ((file[d].size + offset) >= file[d].size)
{
file[d].pos = file[d].size;
k = -1;
}
else if ((file[d].size + offset) < 0)
{
file[d].pos = 0;
k = -1;
}
else
file[d].pos = file[d].size + offset;
}
}
else
k = lseek(*f, (int) offset, mode);
if (k < 0)
k = -1;
else
k = 0;
return k;
}
static int f_close(int *f)
{
int d = (*f) - 0x666;
if((unsigned)(d) <= (0x669 - 0x666))
{
file[d].size = 0;
file[d].pos = 0;
if (file[d].mem)
{
file[d].mem = (char *) 0;
}
return 0;
}
else
return close(*f);
return 0;
}
static long f_tell(int *f)
{
int k;
int d = (*f) - 0x666;
if((unsigned)(d) <= (0x669 - 0x666))
{
k = file[d].pos;
}
else
k = lseek(*f, 0, 1);
return (long) k;
}
static int mem_open(char * ogg, int size)
{
static int one = 1;
int n;
if (one)
{
one = 0;
file[0].size = 0;
file[1].size = 0;
file[2].size = 0;
file[3].size = 0;
file[0].mem = ogg;
file[0].size = size;
file[0].pos = 0;
return (0x666);
}
for (n = 0; n < 4; n++)
{
if (file[n].size == 0)
{
file[n].mem = ogg;
file[n].size = size;
file[n].pos = 0;
return (0x666 + n);
}
}
return -1;
}
static int mem_close(int fd)
{
if((unsigned)((fd) - 0x666) <= (0x669 - 0x666)) // it is a memory file descriptor?
{
fd -= 0x666;
file[fd].size = 0;
return 0;
}
else
return f_close(&fd);
}
static ov_callbacks callbacks = {
(size_t (*)(void *, size_t, size_t, void *)) f_read,
(int (*)(void *, ogg_int64_t, int)) f_seek,
(int (*)(void *)) f_close,
(long (*)(void *)) f_tell
};
class GuiSoundDecoderOGG : public GuiSoundDecoder
{
protected:
GuiSoundDecoderOGG(const u8 * snd, u32 len, bool snd_is_allocated)
{
sound = snd;
is_allocated = snd_is_allocated;
ogg_fd = mem_open((char *)snd, len);
if(ogg_fd < 0) throw("mem open failed");
if (ov_open_callbacks((void*)&ogg_fd, &ogg_file, NULL, 0, callbacks) < 0)
{
mem_close(ogg_fd);
throw("ogg open failed");
}
ogg_info = ov_info(&ogg_file, -1);
bitstream = 0;
is_running = false;
}
public:
~GuiSoundDecoderOGG()
{
while(is_running) usleep(50);
ov_clear(&ogg_file);
if(is_allocated) delete [] sound;
}
static GuiSoundDecoder *Create(const u8 * snd, u32 len, bool snd_is_allocated)
{
if(snd && len>4 && snd[0]=='O' && snd[1]=='g' && snd[2]=='g' && snd[3]=='S')
return new GuiSoundDecoderOGG(snd, len, snd_is_allocated);
return NULL;
}
s32 GetFormat()
{
return ogg_info->channels==2 ? VOICE_STEREO_16BIT : VOICE_MONO_16BIT;
}
s32 GetSampleRate()
{
return ogg_info->rate;
}
/* Read reads data from stream to buffer
return: >0 = readed bytes;
0 = EOF;
<0 = Error;
*/
int Read(u8 * buffer, int buffer_size)
{
is_running = true;
int ret = ov_read(&ogg_file, (char *)buffer, buffer_size, &bitstream);
if (ret < 0)
{
/* error in the stream. Not a problem, just reporting it in
case we (the app) cares. In this case, we don't. */
if (ret != OV_HOLE)
ret = 0; // we says EOF
}
is_running = false;
return ret;
}
int Rewind()
{
return ov_time_seek(&ogg_file, 0);
}
private:
const u8 *sound;
bool is_allocated;
int ogg_fd;
OggVorbis_File ogg_file;
vorbis_info *ogg_info;
int bitstream;
bool is_running;
};
REGISTER_GUI_SOUND_DECODER(GuiSoundDecoderOGG);