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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#ifdef USE_LIBAVCODEC
#include "ad_internal.h"
#include "bswap.h"
static ad_info_t info =
{
"FFmpeg audio decoders",
"ffmpeg",
AFM_FFMPEG,
"Nick Kurshev",
"ffmpeg.sf.net",
""
};
LIBAD_EXTERN(ffmpeg)
#define assert(x)
#ifdef USE_LIBAVCODEC_SO
#include <libffmpeg/avcodec.h>
#else
#include "libavcodec/avcodec.h"
#endif
extern int avcodec_inited;
typedef struct {
AVCodec *lavc_codec;
AVCodecContext *lavc_context;
} ad_ffmpeg_ctx;
static int preinit(sh_audio_t *sh)
{
sh->audio_out_minsize=AVCODEC_MAX_AUDIO_FRAME_SIZE;
return 1;
}
static int init(sh_audio_t *sh_audio)
{
int x;
ad_ffmpeg_ctx *ctx;
mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
if(!avcodec_inited){
avcodec_init();
avcodec_register_all();
avcodec_inited=1;
}
ctx = sh_audio->context = malloc(sizeof(ad_ffmpeg_ctx));
if (!ctx)
return(0);
memset(ctx, 0, sizeof(ad_ffmpeg_ctx));
ctx->lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh_audio->codec->dll);
if(!ctx->lavc_codec){
mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingLAVCcodec,sh_audio->codec->dll);
return 0;
}
ctx->lavc_context = malloc(sizeof(AVCodecContext));
memset(ctx->lavc_context, 0, sizeof(AVCodecContext));
/* open it */
if (avcodec_open(ctx->lavc_context, ctx->lavc_codec) < 0) {
mp_msg(MSGT_DECAUDIO,MSGL_ERR, MSGTR_CantOpenCodec);
return 0;
}
mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec init OK!\n");
// Decode at least 1 byte: (to get header filled)
x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
if(x>0) sh_audio->a_buffer_len=x;
#if 1
sh_audio->channels=ctx->lavc_context->channels;
sh_audio->samplerate=ctx->lavc_context->sample_rate;
sh_audio->i_bps=ctx->lavc_context->bit_rate/8;
#else
sh_audio->channels=sh_audio->wf->nChannels;
sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
#endif
return 1;
}
static void uninit(sh_audio_t *sh)
{
ad_ffmpeg_ctx *ctx = sh->context;
if (avcodec_close(ctx->lavc_context) < 0)
mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_CantCloseCodec);
if (ctx->lavc_context)
free(ctx->lavc_context);
if (ctx)
free(ctx);
}
static int control(sh_audio_t *sh,int cmd,void* arg, ...)
{
// TODO ???
return CONTROL_UNKNOWN;
}
static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
{
ad_ffmpeg_ctx *ctx = sh_audio->context;
unsigned char *start=NULL;
int y,len=-1;
while(len<minlen){
int len2=0;
int x=ds_get_packet(sh_audio->ds,&start);
if(x<=0) break; // error
y=avcodec_decode_audio(ctx->lavc_context,(INT16*)buf,&len2,start,x);
if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
if(y<x) sh_audio->ds->buffer_pos+=y-x; // put back data (HACK!)
if(len2>0){
//len=len2;break;
if(len<0) len=len2; else len+=len2;
buf+=len2;
}
mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d \n",y,len2);
}
return len;
}
#endif
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