libmpcodecs/ae_lavc.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <inttypes.h>
  22 #include <unistd.h>
  23 #include <string.h>
  24 #include <sys/types.h>
  25 #include "config.h"
  26 #include "m_option.h"
  27 #include "mp_msg.h"
  28 #include "libmpdemux/aviheader.h"
  29 #include "libmpdemux/ms_hdr.h"
  30 #include "stream/stream.h"
  31 #include "libmpdemux/muxer.h"
  32 #include "ae_lavc.h"
  33 #include "libaf/af_format.h"
  34 #include "libaf/reorder_ch.h"
  35 #include "libavcodec/avcodec.h"
  36 #include "ffmpeg_files/intreadwrite.h"
  37
  38 static AVCodec        *lavc_acodec;
  39 static AVCodecContext *lavc_actx;
  40 extern char *lavc_param_acodec;
  41 extern int  lavc_param_abitrate;
  42 extern int  lavc_param_atag;
  43 extern int  lavc_param_audio_global_header;
  44 extern int  avcodec_initialized;
  45 static int compressed_frame_size = 0;
  46 #include "libmpdemux/mp_taglists.h"
  47
  48 static int bind_lavc(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  49 {
  50         mux_a->wf = malloc(sizeof(WAVEFORMATEX)+lavc_actx->extradata_size+256);
  51         mux_a->wf->wFormatTag = lavc_param_atag;
  52         mux_a->wf->nChannels = lavc_actx->channels;
  53         mux_a->wf->nSamplesPerSec = lavc_actx->sample_rate;
  54         mux_a->wf->nAvgBytesPerSec = (lavc_actx->bit_rate / 8);
  55         mux_a->avg_rate= lavc_actx->bit_rate;
  56         mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
  57         if(lavc_actx->block_align)
  58                 mux_a->h.dwSampleSize = mux_a->h.dwScale = lavc_actx->block_align;
  59         else
  60         {
  61                 mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * lavc_actx->frame_size)/ mux_a->wf->nSamplesPerSec; /* for cbr */
  62
  63                 if ((mux_a->wf->nAvgBytesPerSec *
  64                         lavc_actx->frame_size) % mux_a->wf->nSamplesPerSec)
  65                 {
  66                         mux_a->h.dwScale = lavc_actx->frame_size;
  67                         mux_a->h.dwRate = lavc_actx->sample_rate;
  68                         mux_a->h.dwSampleSize = 0; // Blocksize not constant
  69                 }
  70                 else
  71                         mux_a->h.dwSampleSize = 0;
  72         }
  73         if(mux_a->h.dwSampleSize)
  74                 mux_a->wf->nBlockAlign = mux_a->h.dwSampleSize;
  75         else
  76                 mux_a->wf->nBlockAlign = 1;
  77         mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
  78         mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
  79
  80         switch(lavc_param_atag)
  81         {
  82                 case 0x11: /* imaadpcm */
  83                         mux_a->wf->wBitsPerSample = 4;
  84                         mux_a->wf->cbSize = 2;
  85                         AV_WL16(mux_a->wf+1, lavc_actx->frame_size);
  86                         break;
  87                 case 0x55: /* mp3 */
  88                         mux_a->wf->cbSize = 12;
  89                         mux_a->wf->wBitsPerSample = 0; /* does not apply */
  90                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
  91                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
  92                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
  93                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
  94                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
  95                         break;
  96                 default:
  97                         mux_a->wf->wBitsPerSample = 0; /* Unknown */
  98                         if (lavc_actx->extradata && (lavc_actx->extradata_size > 0))
  99                         {
 100                                 memcpy(mux_a->wf+1, lavc_actx->extradata, lavc_actx->extradata_size);
 101                                 mux_a->wf->cbSize = lavc_actx->extradata_size;
 102                         }
 103                         else
 104                                 mux_a->wf->cbSize = 0;
 105                         break;
 106         }
 107
 108         // Fix allocation
 109         mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
 110
 111         encoder->input_format = AF_FORMAT_S16_NE;
 112         encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
 113         encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
 114
 115         return 1;
 116 }
 117
 118 static int encode_lavc(audio_encoder_t *encoder, uint8_t *dest, void *src, int size, int max_size)
 119 {
 120         int n;
 121         if ((encoder->params.channels == 6 || encoder->params.channels == 5) &&
 122                         (!strcmp(lavc_acodec->name,"ac3") ||
 123                         !strcmp(lavc_acodec->name,"libfaac"))) {
 124                 int isac3 = !strcmp(lavc_acodec->name,"ac3");
 125                 reorder_channel_nch(src, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 126                                     isac3 ? AF_CHANNEL_LAYOUT_LAVC_DEFAULT
 127                                           : AF_CHANNEL_LAYOUT_AAC_DEFAULT,
 128                                     encoder->params.channels,
 129                                     size / 2, 2);
 130         }
 131         n = avcodec_encode_audio(lavc_actx, dest, size, src);
 132         compressed_frame_size = n;
 133         return n;
 134 }
 135
 136
 137 static int close_lavc(audio_encoder_t *encoder)
 138 {
 139         compressed_frame_size = 0;
 140         return 1;
 141 }
 142
 143 static int get_frame_size(audio_encoder_t *encoder)
 144 {
 145         int sz = compressed_frame_size;
 146         compressed_frame_size = 0;
 147         return sz;
 148 }
 149
 150 int mpae_init_lavc(audio_encoder_t *encoder)
 151 {
 152         encoder->params.samples_per_frame = encoder->params.sample_rate;
 153         encoder->params.bitrate = encoder->params.sample_rate * encoder->params.channels * 2 * 8;
 154
 155         if(!lavc_param_acodec)
 156         {
 157                 mp_tmsg(MSGT_MENCODER, MSGL_FATAL, "Audio LAVC, Missing codec name!\n");
 158                 return 0;
 159         }
 160
 161         if(!avcodec_initialized){
 162                 avcodec_init();
 163                 avcodec_register_all();
 164                 avcodec_initialized=1;
 165         }
 166
 167         lavc_acodec = avcodec_find_encoder_by_name(lavc_param_acodec);
 168         if (!lavc_acodec)
 169         {
 170                 mp_tmsg(MSGT_MENCODER, MSGL_FATAL, "Audio LAVC, couldn't find encoder for codec %s.\n", lavc_param_acodec);
 171                 return 0;
 172         }
 173         if(lavc_param_atag == 0)
 174         {
 175                 lavc_param_atag = mp_av_codec_get_tag(mp_wav_taglists, lavc_acodec->id);
 176                 if(!lavc_param_atag)
 177                 {
 178                         mp_msg(MSGT_MENCODER, MSGL_FATAL, "Couldn't find wav tag for specified codec, exit\n");
 179                         return 0;
 180                 }
 181         }
 182
 183         lavc_actx = avcodec_alloc_context();
 184         if(lavc_actx == NULL)
 185         {
 186                 mp_tmsg(MSGT_MENCODER, MSGL_FATAL, "Audio LAVC, couldn't allocate context!\n");
 187                 return 0;
 188         }
 189
 190         lavc_actx->codec_type = CODEC_TYPE_AUDIO;
 191         lavc_actx->codec_id = lavc_acodec->id;
 192         // put sample parameters
 193         lavc_actx->channels = encoder->params.channels;
 194         lavc_actx->sample_rate = encoder->params.sample_rate;
 195         lavc_actx->time_base.num = 1;
 196         lavc_actx->time_base.den = encoder->params.sample_rate;
 197         if(lavc_param_abitrate<1000)
 198                 lavc_actx->bit_rate = encoder->params.bitrate = lavc_param_abitrate * 1000;
 199         else
 200                 lavc_actx->bit_rate = encoder->params.bitrate = lavc_param_abitrate;
 201
 202
 203         /*
 204         * Special case for adpcm_ima_wav.
 205         * The bitrate is only dependent on samplerate.
 206         * We have to known frame_size and block_align in advance,
 207         * so I just copied the code from libavcodec/adpcm.c
 208         *
 209         * However, ms adpcm_ima_wav uses a block_align of 2048,
 210         * lavc defaults to 1024
 211         */
 212         if(lavc_param_atag == 0x11) {
 213                 int blkalign = 2048;
 214                 int framesize = (blkalign - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
 215                 lavc_actx->bit_rate = lavc_actx->sample_rate*8*blkalign/framesize;
 216         }
 217         if((lavc_param_audio_global_header&1)
 218         /*|| (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))*/){
 219                 lavc_actx->flags |= CODEC_FLAG_GLOBAL_HEADER;
 220         }
 221         if(lavc_param_audio_global_header&2){
 222                 lavc_actx->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
 223         }
 224
 225         if(avcodec_open(lavc_actx, lavc_acodec) < 0)
 226         {
 227                 mp_tmsg(MSGT_MENCODER, MSGL_FATAL, "Couldn't open codec %s, br=%d.\n", lavc_param_acodec, lavc_param_abitrate);
 228                 return 0;
 229         }
 230
 231         if(lavc_param_atag == 0x11) {
 232                 lavc_actx->block_align = 2048;
 233                 lavc_actx->frame_size = (lavc_actx->block_align - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
 234         }
 235
 236         encoder->decode_buffer_size = lavc_actx->frame_size * 2 * encoder->params.channels;
 237         while (encoder->decode_buffer_size < 1024) encoder->decode_buffer_size *= 2;
 238         encoder->bind = bind_lavc;
 239         encoder->get_frame_size = get_frame_size;
 240         encoder->encode = encode_lavc;
 241         encoder->close = close_lavc;
 242
 243         return 1;
 244 }