mirror of https://github.com/mpv-player/mpv
100 lines
2.7 KiB
C
100 lines
2.7 KiB
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
#include "config.h"
|
|
#include "ad_internal.h"
|
|
#include "../libaf/af_format.h"
|
|
|
|
static ad_info_t info =
|
|
{
|
|
"Uncompressed PCM audio decoder",
|
|
"pcm",
|
|
"Nick Kurshev",
|
|
"A'rpi",
|
|
""
|
|
};
|
|
|
|
LIBAD_EXTERN(pcm)
|
|
|
|
static int init(sh_audio_t *sh_audio)
|
|
{
|
|
WAVEFORMATEX *h=sh_audio->wf;
|
|
sh_audio->i_bps=h->nAvgBytesPerSec;
|
|
sh_audio->channels=h->nChannels;
|
|
sh_audio->samplerate=h->nSamplesPerSec;
|
|
sh_audio->samplesize=(h->wBitsPerSample+7)/8;
|
|
sh_audio->sample_format=AFMT_S16_LE; // default
|
|
switch(sh_audio->format){ /* hardware formats: */
|
|
case 0x0:
|
|
case 0x1: // Microsoft PCM
|
|
switch (sh_audio->samplesize) {
|
|
case 1: sh_audio->sample_format=AFMT_U8; break;
|
|
case 2: sh_audio->sample_format=AFMT_S16_LE; break;
|
|
case 3: sh_audio->sample_format=AFMT_S24_LE; break;
|
|
case 4: sh_audio->sample_format=AFMT_S32_LE; break;
|
|
}
|
|
break;
|
|
case 0x6: sh_audio->sample_format=AFMT_A_LAW;break;
|
|
case 0x7: sh_audio->sample_format=AFMT_MU_LAW;break;
|
|
case 0x11: sh_audio->sample_format=AFMT_IMA_ADPCM;break;
|
|
case 0x50: sh_audio->sample_format=AFMT_MPEG;break;
|
|
/* case 0x2000: sh_audio->sample_format=AFMT_AC3; */
|
|
case 0x20776172: // 'raw '
|
|
sh_audio->sample_format=AFMT_S16_BE;
|
|
if(sh_audio->samplesize==1) sh_audio->sample_format=AFMT_U8;
|
|
break;
|
|
case 0x736F7774: // 'twos'
|
|
sh_audio->sample_format=AFMT_S16_BE;
|
|
// intended fall-through
|
|
case 0x74776F73: // 'swot'
|
|
if(sh_audio->samplesize==1) sh_audio->sample_format=AFMT_S8;
|
|
// Uncomment this if twos audio is broken for you
|
|
// (typically with movies made on sgi machines)
|
|
// This is just a workaround, the real bug is elsewhere
|
|
#if 0
|
|
sh_audio->ds->ss_div= sh_audio->samplesize;
|
|
sh_audio->ds->ss_mul= sh_audio->samplesize * sh_audio->channels;
|
|
#endif
|
|
break;
|
|
case 0x32336c66: // 'fl32', bigendian float32
|
|
sh_audio->sample_format=AFMT_AF_FLAGS | AF_FORMAT_BE | AF_FORMAT_F;
|
|
sh_audio->samplesize=4;
|
|
break;
|
|
default: if(sh_audio->samplesize!=2) sh_audio->sample_format=AFMT_U8;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int preinit(sh_audio_t *sh)
|
|
{
|
|
sh->audio_out_minsize=2048;
|
|
return 1;
|
|
}
|
|
|
|
static void uninit(sh_audio_t *sh)
|
|
{
|
|
}
|
|
|
|
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
|
|
{
|
|
int skip;
|
|
switch(cmd)
|
|
{
|
|
case ADCTRL_SKIP_FRAME:
|
|
skip=sh->i_bps/16;
|
|
skip=skip&(~3);
|
|
demux_read_data(sh->ds,NULL,skip);
|
|
return CONTROL_TRUE;
|
|
}
|
|
return CONTROL_UNKNOWN;
|
|
}
|
|
|
|
static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
|
|
{
|
|
int len=sh_audio->channels*sh_audio->samplesize-1;
|
|
len=(minlen+len)&(~len); // sample align
|
|
len=demux_read_data(sh_audio->ds,buf,len);
|
|
return len;
|
|
}
|