mirror of https://github.com/mpv-player/mpv
88 lines
1.7 KiB
C
88 lines
1.7 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 DVD/VOB LPCM audio decoder",
|
|
"dvdpcm",
|
|
"Nick Kurshev",
|
|
"A'rpi",
|
|
""
|
|
};
|
|
|
|
LIBAD_EXTERN(dvdpcm)
|
|
|
|
static int init(sh_audio_t *sh)
|
|
{
|
|
/* DVD PCM Audio:*/
|
|
if(sh->codecdata_len==3){
|
|
// we have LPCM header:
|
|
unsigned char h=sh->codecdata[1];
|
|
sh->channels=1+(h&7);
|
|
switch((h>>4)&3){
|
|
case 0: sh->samplerate=48000;break;
|
|
case 1: sh->samplerate=96000;break;
|
|
case 2: sh->samplerate=44100;break;
|
|
case 3: sh->samplerate=32000;break;
|
|
}
|
|
switch ((h >> 6) & 3) {
|
|
case 0:
|
|
sh->sample_format = AFMT_S16_BE;
|
|
sh->samplesize = 2;
|
|
break;
|
|
case 2:
|
|
sh->sample_format = AFMT_AF_FLAGS | AF_FORMAT_I |
|
|
AF_FORMAT_BE | AF_FORMAT_US;
|
|
sh->samplesize = 3;
|
|
break;
|
|
default:
|
|
sh->sample_format = AFMT_S16_BE;
|
|
sh->samplesize = 2;
|
|
}
|
|
} else {
|
|
// use defaults:
|
|
sh->channels=2;
|
|
sh->samplerate=48000;
|
|
sh->sample_format = AFMT_S16_BE;
|
|
sh->samplesize = 2;
|
|
}
|
|
sh->i_bps = sh->samplesize * sh->channels * sh->samplerate;
|
|
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 j,len;
|
|
len=demux_read_data(sh_audio->ds,buf,(minlen+3)&(~3));
|
|
return len;
|
|
}
|