mirror of https://github.com/mpv-player/mpv
240 lines
6.7 KiB
C
240 lines
6.7 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <inttypes.h>
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#include <unistd.h>
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#include <string.h>
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#include <sys/types.h>
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#include "m_option.h"
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#include "mp_msg.h"
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#include "aviheader.h"
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#include "ms_hdr.h"
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#include "muxer.h"
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#include "ae_lavc.h"
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#include "help_mp.h"
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#include "config.h"
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#include "libaf/af_format.h"
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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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static AVCodec *lavc_acodec;
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static AVCodecContext *lavc_actx;
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extern char *lavc_param_acodec;
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extern int lavc_param_abitrate;
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extern int lavc_param_atag;
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extern int lavc_param_audio_global_header;
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extern int avcodec_inited;
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static int compressed_frame_size = 0;
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#if defined(USE_LIBAVFORMAT) || defined(USE_LIBAVFORMAT_SO)
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extern unsigned int codec_get_wav_tag(int id);
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#endif
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static int bind_lavc(audio_encoder_t *encoder, muxer_stream_t *mux_a)
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{
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mux_a->wf = malloc(sizeof(WAVEFORMATEX)+lavc_actx->extradata_size+256);
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mux_a->wf->wFormatTag = lavc_param_atag;
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mux_a->wf->nChannels = lavc_actx->channels;
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mux_a->wf->nSamplesPerSec = lavc_actx->sample_rate;
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mux_a->wf->nAvgBytesPerSec = (lavc_actx->bit_rate / 8);
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mux_a->avg_rate= lavc_actx->bit_rate;
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mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
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if(lavc_actx->block_align)
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mux_a->h.dwSampleSize = mux_a->h.dwScale = lavc_actx->block_align;
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else
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{
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mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * lavc_actx->frame_size)/ mux_a->wf->nSamplesPerSec; /* for cbr */
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if ((mux_a->wf->nAvgBytesPerSec *
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lavc_actx->frame_size) % mux_a->wf->nSamplesPerSec)
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{
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mux_a->h.dwScale = lavc_actx->frame_size;
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mux_a->h.dwRate = lavc_actx->sample_rate;
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mux_a->h.dwSampleSize = 0; // Blocksize not constant
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}
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else
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mux_a->h.dwSampleSize = mux_a->h.dwScale;
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}
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mux_a->wf->nBlockAlign = mux_a->h.dwScale;
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mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
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mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
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switch(lavc_param_atag)
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{
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case 0x11: /* imaadpcm */
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mux_a->wf->wBitsPerSample = 4;
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mux_a->wf->cbSize = 2;
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((uint16_t*)mux_a->wf)[sizeof(WAVEFORMATEX)] =
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((lavc_actx->block_align - 4 * lavc_actx->channels) / (4 * lavc_actx->channels)) * 8 + 1;
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break;
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case 0x55: /* mp3 */
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mux_a->wf->cbSize = 12;
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mux_a->wf->wBitsPerSample = 0; /* does not apply */
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((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
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((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
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((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
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((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
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((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
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break;
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default:
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mux_a->wf->wBitsPerSample = 0; /* Unknown */
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if (lavc_actx->extradata && (lavc_actx->extradata_size > 0))
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{
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memcpy(mux_a->wf+1, lavc_actx->extradata, lavc_actx->extradata_size);
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mux_a->wf->cbSize = lavc_actx->extradata_size;
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}
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else
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mux_a->wf->cbSize = 0;
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break;
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}
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// Fix allocation
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mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
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encoder->input_format = AF_FORMAT_S16_NE;
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encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
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encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
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return 1;
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}
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static int encode_lavc(audio_encoder_t *encoder, uint8_t *dest, void *src, int size, int max_size)
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{
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int n;
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n = avcodec_encode_audio(lavc_actx, dest, size, src);
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compressed_frame_size = n;
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return n;
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}
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static int close_lavc(audio_encoder_t *encoder)
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{
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compressed_frame_size = 0;
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return 1;
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}
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static int get_frame_size(audio_encoder_t *encoder)
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{
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int sz = compressed_frame_size;
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compressed_frame_size = 0;
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return sz;
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}
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static uint32_t lavc_find_atag(char *codec)
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{
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if(codec == NULL)
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return 0;
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if(! strcasecmp(codec, "mp2"))
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return 0x50;
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if(! strcasecmp(codec, "mp3"))
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return 0x55;
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if(! strcasecmp(codec, "ac3"))
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return 0x2000;
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if(! strcasecmp(codec, "adpcm_ima_wav"))
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return 0x11;
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if(! strncasecmp(codec, "bonk", 4))
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return 0x2048;
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return 0;
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}
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int mpae_init_lavc(audio_encoder_t *encoder)
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{
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encoder->params.samples_per_frame = encoder->params.sample_rate;
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encoder->params.bitrate = encoder->params.sample_rate * encoder->params.channels * 2 * 8;
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if(!lavc_param_acodec)
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{
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mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_NoLavcAudioCodecName);
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return 0;
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}
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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_acodec = avcodec_find_encoder_by_name(lavc_param_acodec);
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if (!lavc_acodec)
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{
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mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LavcAudioCodecNotFound, lavc_param_acodec);
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return 0;
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}
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if(lavc_param_atag == 0)
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{
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#if defined(USE_LIBAVFORMAT) || defined(USE_LIBAVFORMAT_SO)
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lavc_param_atag = codec_get_wav_tag(lavc_acodec->id);
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#else
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lavc_param_atag = lavc_find_atag(lavc_param_acodec);
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#endif
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if(!lavc_param_atag)
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{
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mp_msg(MSGT_MENCODER, MSGL_FATAL, "Couldn't find wav tag for specified codec, exit\n");
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return 0;
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}
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}
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lavc_actx = avcodec_alloc_context();
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if(lavc_actx == NULL)
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{
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mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_CouldntAllocateLavcContext);
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return 0;
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}
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// put sample parameters
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lavc_actx->channels = encoder->params.channels;
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lavc_actx->sample_rate = encoder->params.sample_rate;
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lavc_actx->bit_rate = encoder->params.bitrate = lavc_param_abitrate * 1000;
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/*
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* Special case for adpcm_ima_wav.
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* The bitrate is only dependant on samplerate.
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* We have to known frame_size and block_align in advance,
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* so I just copied the code from libavcodec/adpcm.c
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*
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* However, ms adpcm_ima_wav uses a block_align of 2048,
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* lavc defaults to 1024
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*/
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if(lavc_param_atag == 0x11) {
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int blkalign = 2048;
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int framesize = (blkalign - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
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lavc_actx->bit_rate = lavc_actx->sample_rate*8*blkalign/framesize;
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}
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if((lavc_param_audio_global_header&1)
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/*|| (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))*/){
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lavc_actx->flags |= CODEC_FLAG_GLOBAL_HEADER;
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}
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if(lavc_param_audio_global_header&2){
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lavc_actx->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
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}
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if(avcodec_open(lavc_actx, lavc_acodec) < 0)
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{
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mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_CouldntOpenCodec, lavc_param_acodec, lavc_param_abitrate);
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return 0;
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}
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if(lavc_param_atag == 0x11) {
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lavc_actx->block_align = 2048;
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lavc_actx->frame_size = (lavc_actx->block_align - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
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}
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encoder->decode_buffer_size = lavc_actx->frame_size * 2 * encoder->params.channels;
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encoder->bind = bind_lavc;
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encoder->get_frame_size = get_frame_size;
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encoder->encode = encode_lavc;
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encoder->close = close_lavc;
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return 1;
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}
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