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 "help_mp.h"
  34 #include "libaf/af_format.h"
  35 #include "libaf/reorder_ch.h"
  36 #include "libavcodec/avcodec.h"
  37 #include "libavutil/intreadwrite.h"
  38
  39 static AVCodec        *lavc_acodec;
  40 static AVCodecContext *lavc_actx;
  41 extern char *lavc_param_acodec;
  42 extern int  lavc_param_abitrate;
  43 extern int  lavc_param_atag;
  44 extern int  lavc_param_audio_global_header;
  45 extern int  avcodec_initialized;
  46 static int compressed_frame_size = 0;
  47 #ifdef CONFIG_LIBAVFORMAT
  48 #include "libavformat/avformat.h"
  49 extern const struct AVCodecTag *mp_wav_taglists[];
  50 #endif
  51
  52 static int bind_lavc(audio_encoder_t *encoder, muxer_stream_t *mux_a)
  53 {
  54         mux_a->wf = malloc(sizeof(WAVEFORMATEX)+lavc_actx->extradata_size+256);
  55         mux_a->wf->wFormatTag = lavc_param_atag;
  56         mux_a->wf->nChannels = lavc_actx->channels;
  57         mux_a->wf->nSamplesPerSec = lavc_actx->sample_rate;
  58         mux_a->wf->nAvgBytesPerSec = (lavc_actx->bit_rate / 8);
  59         mux_a->avg_rate= lavc_actx->bit_rate;
  60         mux_a->h.dwRate = mux_a->wf->nAvgBytesPerSec;
  61         if(lavc_actx->block_align)
  62                 mux_a->h.dwSampleSize = mux_a->h.dwScale = lavc_actx->block_align;
  63         else
  64         {
  65                 mux_a->h.dwScale = (mux_a->wf->nAvgBytesPerSec * lavc_actx->frame_size)/ mux_a->wf->nSamplesPerSec; /* for cbr */
  66
  67                 if ((mux_a->wf->nAvgBytesPerSec *
  68                         lavc_actx->frame_size) % mux_a->wf->nSamplesPerSec)
  69                 {
  70                         mux_a->h.dwScale = lavc_actx->frame_size;
  71                         mux_a->h.dwRate = lavc_actx->sample_rate;
  72                         mux_a->h.dwSampleSize = 0; // Blocksize not constant
  73                 }
  74                 else
  75                         mux_a->h.dwSampleSize = 0;
  76         }
  77         if(mux_a->h.dwSampleSize)
  78                 mux_a->wf->nBlockAlign = mux_a->h.dwSampleSize;
  79         else
  80                 mux_a->wf->nBlockAlign = 1;
  81         mux_a->h.dwSuggestedBufferSize = (encoder->params.audio_preload*mux_a->wf->nAvgBytesPerSec)/1000;
  82         mux_a->h.dwSuggestedBufferSize -= mux_a->h.dwSuggestedBufferSize % mux_a->wf->nBlockAlign;
  83
  84         switch(lavc_param_atag)
  85         {
  86                 case 0x11: /* imaadpcm */
  87                         mux_a->wf->wBitsPerSample = 4;
  88                         mux_a->wf->cbSize = 2;
  89                         AV_WL16(mux_a->wf+1, lavc_actx->frame_size);
  90                         break;
  91                 case 0x55: /* mp3 */
  92                         mux_a->wf->cbSize = 12;
  93                         mux_a->wf->wBitsPerSample = 0; /* does not apply */
  94                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->wID = 1;
  95                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->fdwFlags = 2;
  96                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nBlockSize = mux_a->wf->nBlockAlign;
  97                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nFramesPerBlock = 1;
  98                         ((MPEGLAYER3WAVEFORMAT *) (mux_a->wf))->nCodecDelay = 0;
  99                         break;
 100                 default:
 101                         mux_a->wf->wBitsPerSample = 0; /* Unknown */
 102                         if (lavc_actx->extradata && (lavc_actx->extradata_size > 0))
 103                         {
 104                                 memcpy(mux_a->wf+1, lavc_actx->extradata, lavc_actx->extradata_size);
 105                                 mux_a->wf->cbSize = lavc_actx->extradata_size;
 106                         }
 107                         else
 108                                 mux_a->wf->cbSize = 0;
 109                         break;
 110         }
 111
 112         // Fix allocation
 113         mux_a->wf = realloc(mux_a->wf, sizeof(WAVEFORMATEX)+mux_a->wf->cbSize);
 114
 115         encoder->input_format = AF_FORMAT_S16_NE;
 116         encoder->min_buffer_size = mux_a->h.dwSuggestedBufferSize;
 117         encoder->max_buffer_size = mux_a->h.dwSuggestedBufferSize*2;
 118
 119         return 1;
 120 }
 121
 122 static int encode_lavc(audio_encoder_t *encoder, uint8_t *dest, void *src, int size, int max_size)
 123 {
 124         int n;
 125         if ((encoder->params.channels == 6 || encoder->params.channels == 5) &&
 126                         (!strcmp(lavc_acodec->name,"ac3") ||
 127                         !strcmp(lavc_acodec->name,"libfaac"))) {
 128                 int isac3 = !strcmp(lavc_acodec->name,"ac3");
 129                 reorder_channel_nch(src, AF_CHANNEL_LAYOUT_MPLAYER_DEFAULT,
 130                                     isac3 ? AF_CHANNEL_LAYOUT_LAVC_DEFAULT
 131                                           : AF_CHANNEL_LAYOUT_AAC_DEFAULT,
 132                                     encoder->params.channels,
 133                                     size / 2, 2);
 134         }
 135         n = avcodec_encode_audio(lavc_actx, dest, size, src);
 136         compressed_frame_size = n;
 137         return n;
 138 }
 139
 140
 141 static int close_lavc(audio_encoder_t *encoder)
 142 {
 143         compressed_frame_size = 0;
 144         return 1;
 145 }
 146
 147 static int get_frame_size(audio_encoder_t *encoder)
 148 {
 149         int sz = compressed_frame_size;
 150         compressed_frame_size = 0;
 151         return sz;
 152 }
 153
 154 #ifndef CONFIG_LIBAVFORMAT
 155 static uint32_t lavc_find_atag(char *codec)
 156 {
 157         if(codec == NULL)
 158                 return 0;
 159
 160         if(! strcasecmp(codec, "mp2"))
 161                 return 0x50;
 162
 163         if(! strcasecmp(codec, "mp3"))
 164                 return 0x55;
 165
 166         if(! strcasecmp(codec, "ac3"))
 167                 return 0x2000;
 168
 169         if(! strcasecmp(codec, "adpcm_ima_wav"))
 170                 return 0x11;
 171
 172         if(! strncasecmp(codec, "bonk", 4))
 173                 return 0x2048;
 174
 175         return 0;
 176 }
 177 #endif
 178
 179
 180 int mpae_init_lavc(audio_encoder_t *encoder)
 181 {
 182         encoder->params.samples_per_frame = encoder->params.sample_rate;
 183         encoder->params.bitrate = encoder->params.sample_rate * encoder->params.channels * 2 * 8;
 184
 185         if(!lavc_param_acodec)
 186         {
 187                 mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_NoLavcAudioCodecName);
 188                 return 0;
 189         }
 190
 191         if(!avcodec_initialized){
 192                 avcodec_init();
 193                 avcodec_register_all();
 194                 avcodec_initialized=1;
 195         }
 196
 197         lavc_acodec = avcodec_find_encoder_by_name(lavc_param_acodec);
 198         if (!lavc_acodec)
 199         {
 200                 mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_LavcAudioCodecNotFound, lavc_param_acodec);
 201                 return 0;
 202         }
 203         if(lavc_param_atag == 0)
 204         {
 205 #ifdef CONFIG_LIBAVFORMAT
 206                 lavc_param_atag = av_codec_get_tag(mp_wav_taglists, lavc_acodec->id);
 207 #else
 208                 lavc_param_atag = lavc_find_atag(lavc_param_acodec);
 209 #endif
 210                 if(!lavc_param_atag)
 211                 {
 212                         mp_msg(MSGT_MENCODER, MSGL_FATAL, "Couldn't find wav tag for specified codec, exit\n");
 213                         return 0;
 214                 }
 215         }
 216
 217         lavc_actx = avcodec_alloc_context();
 218         if(lavc_actx == NULL)
 219         {
 220                 mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_CouldntAllocateLavcContext);
 221                 return 0;
 222         }
 223
 224         lavc_actx->codec_type = CODEC_TYPE_AUDIO;
 225         lavc_actx->codec_id = lavc_acodec->id;
 226         // put sample parameters
 227         lavc_actx->channels = encoder->params.channels;
 228         lavc_actx->sample_rate = encoder->params.sample_rate;
 229         lavc_actx->time_base.num = 1;
 230         lavc_actx->time_base.den = encoder->params.sample_rate;
 231         if(lavc_param_abitrate<1000)
 232                 lavc_actx->bit_rate = encoder->params.bitrate = lavc_param_abitrate * 1000;
 233         else
 234                 lavc_actx->bit_rate = encoder->params.bitrate = lavc_param_abitrate;
 235
 236
 237         /*
 238         * Special case for adpcm_ima_wav.
 239         * The bitrate is only dependent on samplerate.
 240         * We have to known frame_size and block_align in advance,
 241         * so I just copied the code from libavcodec/adpcm.c
 242         *
 243         * However, ms adpcm_ima_wav uses a block_align of 2048,
 244         * lavc defaults to 1024
 245         */
 246         if(lavc_param_atag == 0x11) {
 247                 int blkalign = 2048;
 248                 int framesize = (blkalign - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
 249                 lavc_actx->bit_rate = lavc_actx->sample_rate*8*blkalign/framesize;
 250         }
 251         if((lavc_param_audio_global_header&1)
 252         /*|| (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))*/){
 253                 lavc_actx->flags |= CODEC_FLAG_GLOBAL_HEADER;
 254         }
 255         if(lavc_param_audio_global_header&2){
 256                 lavc_actx->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
 257         }
 258
 259         if(avcodec_open(lavc_actx, lavc_acodec) < 0)
 260         {
 261                 mp_msg(MSGT_MENCODER, MSGL_FATAL, MSGTR_CouldntOpenCodec, lavc_param_acodec, lavc_param_abitrate);
 262                 return 0;
 263         }
 264
 265         if(lavc_param_atag == 0x11) {
 266                 lavc_actx->block_align = 2048;
 267                 lavc_actx->frame_size = (lavc_actx->block_align - 4 * lavc_actx->channels) * 8 / (4 * lavc_actx->channels) + 1;
 268         }
 269
 270         encoder->decode_buffer_size = lavc_actx->frame_size * 2 * encoder->params.channels;
 271         while (encoder->decode_buffer_size < 1024) encoder->decode_buffer_size *= 2;
 272         encoder->bind = bind_lavc;
 273         encoder->get_frame_size = get_frame_size;
 274         encoder->encode = encode_lavc;
 275         encoder->close = close_lavc;
 276
 277         return 1;
 278 }
 279