mirror of https://github.com/mpv-player/mpv
157 lines
4.0 KiB
C
157 lines
4.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "help_mp.h"
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#ifdef USE_LIBAVCODEC
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#include "ad_internal.h"
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#include "bswap.h"
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static ad_info_t info =
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{
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"FFmpeg/libavcodec audio decoders",
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"ffmpeg",
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"Nick Kurshev",
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"ffmpeg.sf.net",
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""
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};
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LIBAD_EXTERN(ffmpeg)
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#define assert(x)
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#ifdef USE_LIBAVCODEC_SO
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#include <ffmpeg/avcodec.h>
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#else
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#include "libavcodec/avcodec.h"
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#endif
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extern int avcodec_inited;
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static int preinit(sh_audio_t *sh)
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{
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sh->audio_out_minsize=AVCODEC_MAX_AUDIO_FRAME_SIZE;
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return 1;
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}
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static int init(sh_audio_t *sh_audio)
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{
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int x;
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AVCodecContext *lavc_context;
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AVCodec *lavc_codec;
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mp_msg(MSGT_DECAUDIO,MSGL_V,"FFmpeg's libavcodec audio codec\n");
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if(!avcodec_inited){
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avcodec_init();
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avcodec_register_all();
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avcodec_inited=1;
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}
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lavc_codec = (AVCodec *)avcodec_find_decoder_by_name(sh_audio->codec->dll);
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if(!lavc_codec){
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mp_msg(MSGT_DECAUDIO,MSGL_ERR,MSGTR_MissingLAVCcodec,sh_audio->codec->dll);
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return 0;
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}
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lavc_context = avcodec_alloc_context();
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sh_audio->context=lavc_context;
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if(sh_audio->wf){
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lavc_context->channels = sh_audio->wf->nChannels;
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lavc_context->sample_rate = sh_audio->wf->nSamplesPerSec;
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lavc_context->bit_rate = sh_audio->wf->nAvgBytesPerSec * 8;
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lavc_context->block_align = sh_audio->wf->nBlockAlign;
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}
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lavc_context->fourcc = sh_audio->format;
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lavc_context->codec_id = lavc_codec->id; // not sure if required, imho not --A'rpi
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/* alloc extra data */
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if (sh_audio->wf && sh_audio->wf->cbSize > 0) {
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lavc_context->extradata = malloc(sh_audio->wf->cbSize);
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lavc_context->extradata_size = sh_audio->wf->cbSize;
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memcpy(lavc_context->extradata, (char *)sh_audio->wf + sizeof(WAVEFORMATEX),
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lavc_context->extradata_size);
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}
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/* open it */
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if (avcodec_open(lavc_context, lavc_codec) < 0) {
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mp_msg(MSGT_DECAUDIO,MSGL_ERR, MSGTR_CantOpenCodec);
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return 0;
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}
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mp_msg(MSGT_DECAUDIO,MSGL_V,"INFO: libavcodec init OK!\n");
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// printf("\nFOURCC: 0x%X\n",sh_audio->format);
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if(sh_audio->format==0x3343414D){
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// MACE 3:1
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sh_audio->ds->ss_div = 2*3; // 1 samples/packet
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sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
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} else
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if(sh_audio->format==0x3643414D){
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// MACE 6:1
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sh_audio->ds->ss_div = 2*6; // 1 samples/packet
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sh_audio->ds->ss_mul = 2*sh_audio->wf->nChannels; // 1 byte*ch/packet
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}
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// Decode at least 1 byte: (to get header filled)
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x=decode_audio(sh_audio,sh_audio->a_buffer,1,sh_audio->a_buffer_size);
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if(x>0) sh_audio->a_buffer_len=x;
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#if 1
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sh_audio->channels=lavc_context->channels;
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sh_audio->samplerate=lavc_context->sample_rate;
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sh_audio->i_bps=lavc_context->bit_rate/8;
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#else
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sh_audio->channels=sh_audio->wf->nChannels;
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sh_audio->samplerate=sh_audio->wf->nSamplesPerSec;
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sh_audio->i_bps=sh_audio->wf->nAvgBytesPerSec;
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#endif
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return 1;
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}
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static void uninit(sh_audio_t *sh)
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{
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AVCodecContext *lavc_context = sh->context;
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if (avcodec_close(lavc_context) < 0)
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mp_msg(MSGT_DECVIDEO, MSGL_ERR, MSGTR_CantCloseCodec);
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if (lavc_context->extradata)
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free(lavc_context->extradata);
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free(lavc_context);
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}
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static int control(sh_audio_t *sh,int cmd,void* arg, ...)
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{
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// TODO ???
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return CONTROL_UNKNOWN;
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}
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static int decode_audio(sh_audio_t *sh_audio,unsigned char *buf,int minlen,int maxlen)
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{
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unsigned char *start=NULL;
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int y,len=-1;
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while(len<minlen){
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int len2=0;
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int x=ds_get_packet(sh_audio->ds,&start);
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if(x<=0) break; // error
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y=avcodec_decode_audio(sh_audio->context,(INT16*)buf,&len2,start,x);
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if(y<0){ mp_msg(MSGT_DECAUDIO,MSGL_V,"lavc_audio: error\n");break; }
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if(y<x) sh_audio->ds->buffer_pos+=y-x; // put back data (HACK!)
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if(len2>0){
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//len=len2;break;
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if(len<0) len=len2; else len+=len2;
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buf+=len2;
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}
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mp_dbg(MSGT_DECAUDIO,MSGL_DBG2,"Decoded %d -> %d \n",y,len2);
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}
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return len;
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}
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#endif
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