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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
extern int verbose; // defined in mplayer.c
#include "stream.h"
#include "demuxer.h"
#include "codec-cfg.h"
#include "stheader.h"
#include "dec_audio.h"
#include "ad.h"
#include "../libao2/afmt.h"
#ifdef USE_FAKE_MONO
int fakemono=0;
#endif
/* used for ac3surround decoder - set using -channels option */
int audio_output_channels = 2;
static ad_functions_t* mpadec;
int init_audio(sh_audio_t *sh_audio)
{
unsigned i;
for (i=0; mpcodecs_ad_drivers[i] != NULL; i++)
if(mpcodecs_ad_drivers[i]->info->id==sh_audio->codec->driver){
mpadec=mpcodecs_ad_drivers[i]; break;
}
if(!mpadec){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,"Requested audio codec family [%s] (vfm=%d) not available (enable it at compile time!)\n",
sh_audio->codec->name, sh_audio->codec->driver);
return 0; // no such driver
}
printf("Selecting Audio Decoder: [%s] %s\n",mpadec->info->short_name,mpadec->info->name);
sh_audio->samplesize=2;
#ifdef WORDS_BIGENDIAN
sh_audio->sample_format=AFMT_S16_BE;
#else
sh_audio->sample_format=AFMT_S16_LE;
#endif
sh_audio->samplerate=0;
sh_audio->o_bps=0;
sh_audio->a_buffer_size=0;
sh_audio->a_buffer=NULL;
sh_audio->a_in_buffer_len=0;
/* setup required min. in/out buffer size:*/
sh_audio->audio_out_minsize=8192;/* default size, maybe not enough for Win32/ACM*/
if(!mpadec->preinit(sh_audio))
{
printf("ADecoder preinit failed :(\n");
return 0;
}
/* allocate audio out buffer: */
sh_audio->a_buffer_size=sh_audio->audio_out_minsize+MAX_OUTBURST; /* worst case calc.*/
mp_msg(MSGT_DECAUDIO,MSGL_V,"dec_audio: Allocating %d + %d = %d bytes for output buffer\n",
sh_audio->audio_out_minsize,MAX_OUTBURST,sh_audio->a_buffer_size);
sh_audio->a_buffer=malloc(sh_audio->a_buffer_size);
if(!sh_audio->a_buffer){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_CantAllocAudioBuf);
return 0;
}
memset(sh_audio->a_buffer,0,sh_audio->a_buffer_size);
sh_audio->a_buffer_len=0;
if(!mpadec->init(sh_audio)){
printf("ADecoder init failed :(\n");
return 0;
}
sh_audio->inited=1;
if(!sh_audio->channels || !sh_audio->samplerate){
mp_msg(MSGT_DECAUDIO,MSGL_WARN,MSGTR_UnknownAudio);
if(sh_audio->a_buffer) free(sh_audio->a_buffer);
sh_audio->a_buffer=NULL;
return 0;
}
if(!sh_audio->o_bps)
sh_audio->o_bps=sh_audio->channels*sh_audio->samplerate*sh_audio->samplesize;
return sh_audio->codec->driver;
}
void uninit_audio(sh_audio_t *sh_audio)
{
if(!sh_audio->inited) return;
mp_msg(MSGT_DECAUDIO,MSGL_V,"uninit audio: %d \n",sh_audio->codec->driver);
mpadec->uninit(sh_audio);
if(sh_audio->a_buffer) free(sh_audio->a_buffer);
sh_audio->a_buffer=NULL;
sh_audio->inited=0;
}
int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
if(sh_audio->inited)
return mpadec->decode_audio(sh_audio,buf,minlen,maxlen);
else
return -1;
}
void resync_audio_stream(sh_audio_t *sh_audio)
{
if(!sh_audio->inited) return;
if(mpadec->control(sh_audio,ADCTRL_RESYNC_STREAM,NULL)==CONTROL_TRUE) return;
// default resync code:
sh_audio->a_in_buffer_len=0; // clear audio input buffer
}
void skip_audio_frame(sh_audio_t *sh_audio)
{
if(!sh_audio->inited) return;
if(mpadec->control(sh_audio,ADCTRL_SKIP_FRAME,NULL)==CONTROL_TRUE) return;
// default skip code:
ds_fill_buffer(sh_audio->ds); // skip block
}
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