research.m1stereo.tv/gitweb/ - melted/blob - src/modules/avformat/consumer_avformat.c

   1 /*
   2  * consumer_avformat.c -- an encoder based on avformat
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 // Local header files
  22 #include "consumer_avformat.h"
  23
  24 // mlt Header files
  25 #include <framework/mlt_frame.h>
  26
  27 // System header files
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <pthread.h>
  32 #include <sys/time.h>
  33 #include <math.h>
  34
  35 // avformat header files
  36 #include <avformat.h>
  37
  38 typedef struct
  39 {
  40         int16_t *buffer;
  41         int size;
  42         int used;
  43 }
  44 *sample_fifo, sample_fifo_s;
  45
  46 sample_fifo sample_fifo_init( )
  47 {
  48         return calloc( 1, sizeof( sample_fifo_s ) );
  49 }
  50
  51 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  52 {
  53         if ( ( this->size - this->used ) < count )
  54         {
  55                 this->size += count * 5;
  56                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  57         }
  58
  59         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
  60         this->used += count;
  61 }
  62
  63 int sample_fifo_used( sample_fifo this )
  64 {
  65         return this->used;
  66 }
  67
  68 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
  69 {
  70         if ( count > this->used )
  71                 count = this->used;
  72
  73         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
  74         this->used -= count;
  75         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
  76
  77         return count;
  78 }
  79
  80 void sample_fifo_close( sample_fifo this )
  81 {
  82         free( this->buffer );
  83         free( this );
  84 }
  85
  86 // Forward references.
  87 static int consumer_start( mlt_consumer this );
  88 static int consumer_stop( mlt_consumer this );
  89 static int consumer_is_stopped( mlt_consumer this );
  90 static void *consumer_thread( void *arg );
  91 static void consumer_close( mlt_consumer this );
  92
  93 /** Initialise the dv consumer.
  94 */
  95
  96 mlt_consumer consumer_avformat_init( char *arg )
  97 {
  98         // Allocate the consumer
  99         mlt_consumer this = mlt_consumer_new( );
 100
 101         // If memory allocated and initialises without error
 102         if ( this != NULL )
 103         {
 104                 // Get properties from the consumer
 105                 mlt_properties properties = mlt_consumer_properties( this );
 106
 107                 // Assign close callback
 108                 this->close = consumer_close;
 109
 110                 // Interpret the argument
 111                 if ( arg != NULL )
 112                         mlt_properties_set( properties, "target", arg );
 113
 114                 // sample and frame queue
 115                 mlt_properties_set_data( properties, "sample_fifo", sample_fifo_init( ), 0, ( mlt_destructor )sample_fifo_close, NULL );
 116                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 117
 118                 // Set avformat defaults (all lifted from ffmpeg.c)
 119                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 120                 mlt_properties_set_int( properties, "video_bit_rate", 200 * 1000 );
 121                 mlt_properties_set_int( properties, "video_bit_rate_tolerance", 4000 * 1000 );
 122                 mlt_properties_set_int( properties, "frame_rate_base", 1 );
 123                 mlt_properties_set_int( properties, "gop_size", 12 );
 124                 mlt_properties_set_int( properties, "b_frames", 0 );
 125                 mlt_properties_set_int( properties, "mb_decision", FF_MB_DECISION_SIMPLE );
 126                 mlt_properties_set_double( properties, "qscale", 0 );
 127                 mlt_properties_set_int( properties, "me_method", ME_EPZS );
 128                 mlt_properties_set_int( properties, "mb_cmp", FF_CMP_SAD );
 129                 mlt_properties_set_int( properties, "ildct_cmp", FF_CMP_VSAD );
 130                 mlt_properties_set_int( properties, "sub_cmp", FF_CMP_SAD );
 131                 mlt_properties_set_int( properties, "cmp", FF_CMP_SAD );
 132                 mlt_properties_set_int( properties, "pre_cmp", FF_CMP_SAD );
 133                 mlt_properties_set_int( properties, "pre_me", 0 );
 134                 mlt_properties_set_double( properties, "lumi_mask", 0 );
 135                 mlt_properties_set_double( properties, "dark_mask", 0 );
 136                 mlt_properties_set_double( properties, "scplx_mask", 0 );
 137                 mlt_properties_set_double( properties, "tcplx_mask", 0 );
 138                 mlt_properties_set_double( properties, "p_mask", 0 );
 139                 mlt_properties_set_int( properties, "qns", 0 );
 140                 mlt_properties_set_int( properties, "video_qmin", 2 );
 141                 mlt_properties_set_int( properties, "video_qmax", 31 );
 142                 mlt_properties_set_int( properties, "video_lmin", 2*FF_QP2LAMBDA );
 143                 mlt_properties_set_int( properties, "video_lmax", 31*FF_QP2LAMBDA );
 144                 mlt_properties_set_int( properties, "video_mb_qmin", 2 );
 145                 mlt_properties_set_int( properties, "video_mb_qmax", 31 );
 146                 mlt_properties_set_int( properties, "video_qdiff", 3 );
 147                 mlt_properties_set_double( properties, "video_qblur", 0.5 );
 148                 mlt_properties_set_double( properties, "video_qcomp", 0.5 );
 149                 mlt_properties_set_int( properties, "video_rc_max_rate", 0 );
 150                 mlt_properties_set_int( properties, "video_rc_min_rate", 0 );
 151                 mlt_properties_set_int( properties, "video_rc_buffer_size", 0 );
 152                 mlt_properties_set_double( properties, "video_rc_buffer_aggressivity", 1.0 );
 153                 mlt_properties_set_double( properties, "video_rc_initial_cplx", 0 );
 154                 mlt_properties_set_double( properties, "video_i_qfactor", 1.25 );
 155                 mlt_properties_set_double( properties, "video_b_qfactor", 1.25 );
 156                 mlt_properties_set_double( properties, "video_i_qoffset", -0.8 );
 157                 mlt_properties_set_double( properties, "video_b_qoffset", 0 );
 158                 mlt_properties_set_int( properties, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS );
 159                 mlt_properties_set_int( properties, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS );
 160                 mlt_properties_set_int( properties, "dct_algo", 0 );
 161                 mlt_properties_set_int( properties, "idct_algo", 0 );
 162                 mlt_properties_set_int( properties, "me_threshold", 0 );
 163                 mlt_properties_set_int( properties, "mb_threshold", 0 );
 164                 mlt_properties_set_int( properties, "intra_dc_precision", 0 );
 165                 mlt_properties_set_int( properties, "strict", 0 );
 166                 mlt_properties_set_int( properties, "error_rate", 0 );
 167                 mlt_properties_set_int( properties, "noise_reduction", 0 );
 168                 mlt_properties_set_int( properties, "sc_threshold", 0 );
 169                 mlt_properties_set_int( properties, "me_range", 0 );
 170                 mlt_properties_set_int( properties, "coder", 0 );
 171                 mlt_properties_set_int( properties, "context", 0 );
 172                 mlt_properties_set_int( properties, "predictor", 0 );
 173
 174                 // Ensure termination at end of the stream
 175                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 176
 177                 // Set up start/stop/terminated callbacks
 178                 this->start = consumer_start;
 179                 this->stop = consumer_stop;
 180                 this->is_stopped = consumer_is_stopped;
 181         }
 182
 183         // Return this
 184         return this;
 185 }
 186
 187 /** Start the consumer.
 188 */
 189
 190 static int consumer_start( mlt_consumer this )
 191 {
 192         // Get the properties
 193         mlt_properties properties = mlt_consumer_properties( this );
 194
 195         // Check that we're not already running
 196         if ( !mlt_properties_get_int( properties, "running" ) )
 197         {
 198                 // Allocate a thread
 199                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 200                 pthread_attr_t thread_attributes;
 201
 202                 // Get the width and height
 203                 int width = mlt_properties_get_int( properties, "width" );
 204                 int height = mlt_properties_get_int( properties, "height" );
 205
 206                 // Obtain the size property
 207                 char *size = mlt_properties_get( properties, "size" );
 208
 209                 // Interpret it
 210                 if ( size != NULL )
 211                 {
 212                         int tw, th;
 213                         if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
 214                         {
 215                                 width = tw;
 216                                 height = th;
 217                         }
 218                         else
 219                         {
 220                                 fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
 221                         }
 222                 }
 223
 224                 // Now ensure we honour the multiple of two requested by libavformat
 225                 mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
 226                 mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
 227
 228                 // Assign the thread to properties
 229                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 230
 231                 // Set the running state
 232                 mlt_properties_set_int( properties, "running", 1 );
 233
 234                 // Inherit the scheduling priority
 235                 pthread_attr_init( &thread_attributes );
 236                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 237
 238                 // Create the thread
 239                 pthread_create( thread, &thread_attributes, consumer_thread, this );
 240         }
 241         return 0;
 242 }
 243
 244 /** Stop the consumer.
 245 */
 246
 247 static int consumer_stop( mlt_consumer this )
 248 {
 249         // Get the properties
 250         mlt_properties properties = mlt_consumer_properties( this );
 251
 252         // Check that we're running
 253         if ( mlt_properties_get_int( properties, "running" ) )
 254         {
 255                 // Get the thread
 256                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 257
 258                 // Stop the thread
 259                 mlt_properties_set_int( properties, "running", 0 );
 260
 261                 // Wait for termination
 262                 pthread_join( *thread, NULL );
 263         }
 264
 265         return 0;
 266 }
 267
 268 /** Determine if the consumer is stopped.
 269 */
 270
 271 static int consumer_is_stopped( mlt_consumer this )
 272 {
 273         // Get the properties
 274         mlt_properties properties = mlt_consumer_properties( this );
 275         return !mlt_properties_get_int( properties, "running" );
 276 }
 277
 278 /** Add an audio output stream
 279 */
 280
 281 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 282 {
 283         // Get the properties
 284         mlt_properties properties = mlt_consumer_properties( this );
 285
 286         // Create a new stream
 287         AVStream *st = av_new_stream( oc, 1 );
 288
 289         // If created, then initialise from properties
 290         if ( st != NULL )
 291         {
 292                 AVCodecContext *c = &st->codec;
 293                 c->codec_id = codec_id;
 294                 c->codec_type = CODEC_TYPE_AUDIO;
 295
 296                 // Put sample parameters
 297                 c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 298                 c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 299                 c->channels = mlt_properties_get_int( properties, "channels" );
 300         }
 301         else
 302         {
 303                 fprintf( stderr, "Could not allocate a stream for audio\n" );
 304         }
 305
 306         return st;
 307 }
 308
 309 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 310 {
 311         // We will return the audio input size from here
 312         int audio_input_frame_size = 0;
 313
 314         // Get the context
 315         AVCodecContext *c = &st->codec;
 316
 317         // Find the encoder
 318         AVCodec *codec = avcodec_find_encoder( c->codec_id );
 319
 320         // Continue if codec found and we can open it
 321         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 322         {
 323                 // ugly hack for PCM codecs (will be removed ASAP with new PCM
 324                 // support to compute the input frame size in samples
 325                 if ( c->frame_size <= 1 )
 326                 {
 327                         audio_input_frame_size = audio_outbuf_size / c->channels;
 328                         switch(st->codec.codec_id)
 329                         {
 330                                 case CODEC_ID_PCM_S16LE:
 331                                 case CODEC_ID_PCM_S16BE:
 332                                 case CODEC_ID_PCM_U16LE:
 333                                 case CODEC_ID_PCM_U16BE:
 334                                         audio_input_frame_size >>= 1;
 335                                         break;
 336                                 default:
 337                                         break;
 338                         }
 339                 }
 340                 else
 341                 {
 342                         audio_input_frame_size = c->frame_size;
 343                 }
 344
 345                 // Some formats want stream headers to be seperate (hmm)
 346                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 347                         !strcmp( oc->oformat->name, "mov" ) ||
 348                         !strcmp( oc->oformat->name, "3gp" ) )
 349                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 350         }
 351         else
 352         {
 353                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 354         }
 355
 356         return audio_input_frame_size;
 357 }
 358
 359 static void close_audio( AVFormatContext *oc, AVStream *st )
 360 {
 361         avcodec_close( &st->codec );
 362 }
 363
 364 /** Add a video output stream
 365 */
 366
 367 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 368 {
 369         // Get the properties
 370         mlt_properties properties = mlt_consumer_properties( this );
 371
 372         // Create a new stream
 373         AVStream *st = av_new_stream( oc, 0 );
 374
 375         if ( st != NULL )
 376         {
 377                 AVCodecContext *c = &st->codec;
 378                 c->codec_id = codec_id;
 379                 c->codec_type = CODEC_TYPE_VIDEO;
 380
 381                 // put sample parameters
 382                 c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 383                 c->bit_rate_tolerance = mlt_properties_get_int( properties, "video_bit_rate_tolerance" );
 384                 c->width = mlt_properties_get_int( properties, "width" );
 385                 c->height = mlt_properties_get_int( properties, "height" );
 386                 c->frame_rate = mlt_properties_get_double( properties, "fps" );
 387                 c->frame_rate_base = mlt_properties_get_double( properties, "frame_rate_base" );
 388                 c->frame_rate_base = 1;
 389                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 390
 391                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 392                 {
 393                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 394                         c->b_frame_strategy = 0;
 395                         c->b_quant_factor = 2.0;
 396                 }
 397
 398                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 399                 c->sample_aspect_ratio = av_d2q( mlt_properties_get_double( properties, "aspect_ratio" ), 255 );
 400                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 401                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 402                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 403                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 404                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 405                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 406                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 407                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 408                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 409                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 410                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 411                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 412                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 413                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 414                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 415                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 416                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 417                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 418                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 419                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 420                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 421
 422                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 423                 {
 424                         c->flags |= CODEC_FLAG_QSCALE;
 425                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 426                 }
 427
 428                 // Some formats want stream headers to be seperate (hmm)
 429                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 430                         !strcmp( oc->oformat->name, "mov" ) ||
 431                         !strcmp( oc->oformat->name, "3gp" ) )
 432                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 433
 434                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 435                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 436                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 437                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 438                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 439                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 440                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 441                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 442                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 443                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 444                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 445                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 446                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 447                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 448                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 449                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 450                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 451                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 452                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 453                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 454                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 455                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 456                 c->context_model= mlt_properties_get_int( properties, "context" );
 457                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 458                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 459         }
 460         else
 461         {
 462                 fprintf( stderr, "Could not allocate a stream for video\n" );
 463         }
 464
 465         return st;
 466 }
 467
 468 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 469 {
 470         // Allocate a frame
 471         AVFrame *picture = avcodec_alloc_frame();
 472
 473         // Determine size of the
 474         int size = avpicture_get_size(pix_fmt, width, height);
 475
 476         // Allocate the picture buf
 477         uint8_t *picture_buf = av_malloc(size);
 478
 479         // If we have both, then fill the image
 480         if ( picture != NULL && picture_buf != NULL )
 481         {
 482                 // Fill the frame with the allocated buffer
 483                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 484         }
 485         else
 486         {
 487                 // Something failed - clean up what we can
 488                 av_free( picture );
 489                 av_free( picture_buf );
 490                 picture = NULL;
 491         }
 492
 493         return picture;
 494 }
 495
 496 static int open_video(AVFormatContext *oc, AVStream *st)
 497 {
 498         // Get the codec
 499         AVCodecContext *c = &st->codec;
 500
 501         // find the video encoder
 502         AVCodec *codec = avcodec_find_encoder(c->codec_id);
 503
 504         // Open the codec safely
 505         return codec != NULL && avcodec_open(c, codec) >= 0;
 506 }
 507
 508 void close_video(AVFormatContext *oc, AVStream *st)
 509 {
 510         avcodec_close(&st->codec);
 511 }
 512
 513 static inline long time_difference( struct timeval *time1 )
 514 {
 515         struct timeval time2;
 516         gettimeofday( &time2, NULL );
 517         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 518 }
 519
 520 /** The main thread - the argument is simply the consumer.
 521 */
 522
 523 static void *consumer_thread( void *arg )
 524 {
 525         // Map the argument to the object
 526         mlt_consumer this = arg;
 527
 528         // Get the properties
 529         mlt_properties properties = mlt_consumer_properties( this );
 530
 531         // Get the terminate on pause property
 532         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 533         int terminated = 0;
 534
 535         // Determine if feed is slow (for realtime stuff)
 536         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 537
 538         // Time structures
 539         struct timeval ante;
 540
 541         // Get the frame rate
 542         int fps = mlt_properties_get_double( properties, "fps" );
 543
 544         // Get width and height
 545         int width = mlt_properties_get_int( properties, "width" );
 546         int height = mlt_properties_get_int( properties, "height" );
 547         int img_width = width;
 548         int img_height = height;
 549
 550         // Get default audio properties
 551         mlt_audio_format aud_fmt = mlt_audio_pcm;
 552         int channels = mlt_properties_get_int( properties, "channels" );
 553         int frequency = mlt_properties_get_int( properties, "frequency" );
 554         int16_t *pcm = NULL;
 555         int samples = 0;
 556
 557         // AVFormat audio buffer and frame size
 558         int audio_outbuf_size = 2 * 128 * 1024;
 559         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 560         int audio_input_frame_size = 0;
 561
 562         // AVFormat video buffer and frame count
 563         int frame_count = 0;
 564         int video_outbuf_size = ( 1024 * 1024 );
 565         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 566
 567         // Used for the frame properties
 568         mlt_frame frame = NULL;
 569         mlt_properties frame_properties = NULL;
 570
 571         // Get the queues
 572         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 573         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 574
 575         // Need two av pictures for converting
 576         AVFrame *output = alloc_picture( PIX_FMT_YUV420P, width, height );
 577         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 578
 579         // For receiving images from an mlt_frame
 580         uint8_t *image;
 581         mlt_image_format img_fmt = mlt_image_yuv422;
 582
 583         // For receiving audio samples back from the fifo
 584         int16_t *buffer = av_malloc( 48000 * 2 );
 585         int count = 0;
 586
 587         // Allocate the context
 588         AVFormatContext *oc = av_alloc_format_context( );
 589
 590         // Streams
 591         AVStream *audio_st = NULL;
 592         AVStream *video_st = NULL;
 593
 594         // Time stamps
 595         double audio_pts, video_pts;
 596
 597         // Loop variable
 598         int i;
 599
 600         // Frames despatched
 601         long int frames = 0;
 602         long int total_time = 0;
 603
 604         // Determine the format
 605         AVOutputFormat *fmt = NULL;
 606         char *filename = mlt_properties_get( properties, "target" );
 607         char *format = mlt_properties_get( properties, "format" );
 608         char *vcodec = mlt_properties_get( properties, "vcodec" );
 609         char *acodec = mlt_properties_get( properties, "acodec" );
 610
 611         // Used to store and override codec ids
 612         int audio_codec_id;
 613         int video_codec_id;
 614
 615         // Check for user selected format first
 616         if ( format != NULL )
 617                 fmt = guess_format( format, NULL, NULL );
 618
 619         // Otherwise check on the filename
 620         if ( fmt == NULL && filename != NULL )
 621                 fmt = guess_format( NULL, filename, NULL );
 622
 623         // Otherwise default to mpeg
 624         if ( fmt == NULL )
 625                 fmt = guess_format( "mpeg", NULL, NULL );
 626
 627         // We need a filename - default to stdout?
 628         if ( filename == NULL )
 629                 filename = "pipe:";
 630
 631         // Get the codec ids selected
 632         audio_codec_id = fmt->audio_codec;
 633         video_codec_id = fmt->video_codec;
 634
 635         // Check for audio codec overides
 636         if ( acodec != NULL )
 637         {
 638                 AVCodec *p = first_avcodec;
 639                 while( p != NULL )
 640                 {
 641                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 642                                 break;
 643                         p = p->next;
 644                 }
 645                 if ( p != NULL )
 646                         audio_codec_id = p->id;
 647                 else
 648                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 649         }
 650
 651         // Check for video codec overides
 652         if ( vcodec != NULL )
 653         {
 654                 AVCodec *p = first_avcodec;
 655                 while( p != NULL )
 656                 {
 657                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 658                                 break;
 659                         p = p->next;
 660                 }
 661                 if ( p != NULL )
 662                         video_codec_id = p->id;
 663                 else
 664                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 665         }
 666
 667         // Update the output context
 668         oc->oformat = fmt;
 669         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 670
 671         // Add audio and video streams
 672         if ( fmt->video_codec != CODEC_ID_NONE )
 673                 video_st = add_video_stream( this, oc, video_codec_id );
 674         if ( fmt->audio_codec != CODEC_ID_NONE )
 675                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 676
 677         // Set the parameters (even though we have none...)
 678         if ( av_set_parameters(oc, NULL) >= 0 )
 679         {
 680                 if ( video_st && !open_video( oc, video_st ) )
 681                         video_st = NULL;
 682                 if ( audio_st )
 683                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 684
 685                 // Open the output file, if needed
 686                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 687                 {
 688                         if (url_fopen(&oc->pb, filename, URL_RDWR) < 0)
 689                         {
 690                                 fprintf(stderr, "Could not open '%s'\n", filename);
 691                                 mlt_properties_set_int( properties, "running", 0 );
 692                         }
 693                 }
 694
 695                 // Write the stream header, if any
 696                 if ( mlt_properties_get_int( properties, "running" ) )
 697                         av_write_header( oc );
 698         }
 699         else
 700         {
 701                 fprintf(stderr, "Invalid output format parameters\n");
 702                 mlt_properties_set_int( properties, "running", 0 );
 703         }
 704
 705         // Last check - need at least one stream
 706         if ( audio_st == NULL && video_st == NULL )
 707                 mlt_properties_set_int( properties, "running", 0 );
 708
 709         // Get the starting time (can ignore the times above)
 710         gettimeofday( &ante, NULL );
 711
 712         // Loop while running
 713         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 714         {
 715                 // Get the frame
 716                 frame = mlt_consumer_rt_frame( this );
 717
 718                 // Check that we have a frame to work with
 719                 if ( frame != NULL )
 720                 {
 721                         // Increment frames despatched
 722                         frames ++;
 723
 724                         // Default audio args
 725                         frame_properties = mlt_frame_properties( frame );
 726
 727                         // Check for the terminated condition
 728                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 729
 730                         // Get audio and append to the fifo
 731                         if ( audio_st )
 732                         {
 733                                 samples = mlt_sample_calculator( fps, frequency, count );
 734                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 735                                 sample_fifo_append( fifo, pcm, samples * channels );
 736                                 total_time += ( samples * 1000000 ) / frequency;
 737                         }
 738
 739                         // Encode the image
 740                         if ( video_st )
 741                                 mlt_deque_push_back( queue, frame );
 742                         else
 743                                 mlt_frame_close( frame );
 744                 }
 745
 746                 // While we have stuff to process, process...
 747                 while ( 1 )
 748                 {
 749                         // Compute current audio and video time
 750                         if (audio_st)
 751                                 audio_pts = (double)audio_st->pts.val * oc->pts_num / oc->pts_den;
 752                         else
 753                                 audio_pts = 0.0;
 754
 755                         if (video_st)
 756                                 video_pts = (double)video_st->pts.val * oc->pts_num / oc->pts_den;
 757                         else
 758                                 video_pts = 0.0;
 759
 760                         // Write interleaved audio and video frames
 761                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 762                         {
 763                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 764                                 {
 765                                         int out_size;
 766                                         AVCodecContext *c;
 767
 768                                         c = &audio_st->codec;
 769
 770                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 771
 772                                         out_size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 773
 774                                         // Write the compressed frame in the media file
 775                                         if (av_write_frame(oc, audio_st->index, audio_outbuf, out_size) != 0)
 776                                                 fprintf(stderr, "Error while writing audio frame\n");
 777                                 }
 778                                 else
 779                                 {
 780                                         break;
 781                                 }
 782                         }
 783                         else if ( video_st )
 784                         {
 785                                 if ( mlt_deque_count( queue ) )
 786                                 {
 787                                         int out_size, ret;
 788                                         AVCodecContext *c;
 789
 790                                         frame = mlt_deque_pop_front( queue );
 791                                         frame_properties = mlt_frame_properties( frame );
 792
 793                                         c = &video_st->codec;
 794
 795                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 796                                         {
 797                                                 int i = 0;
 798                                                 int j = 0;
 799                                                 uint8_t *p;
 800                                                 uint8_t *q;
 801
 802                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 803
 804                                                 q = image;
 805
 806                                                 for ( i = 0; i < height; i ++ )
 807                                                 {
 808                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 809                                                         j = width;
 810                                                         while( j -- )
 811                                                         {
 812                                                                 *p ++ = *q ++;
 813                                                                 *p ++ = *q ++;
 814                                                         }
 815                                                 }
 816
 817                                                 img_convert( ( AVPicture * )output, PIX_FMT_YUV420P, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 818                                         }
 819
 820                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 821                                         {
 822                                                 // raw video case. The API will change slightly in the near future for that
 823                                                 ret = av_write_frame(oc, video_st->index, (uint8_t *)output, sizeof(AVPicture));
 824                                         }
 825                                         else
 826                                         {
 827                                                 // Set the quality
 828                                                 output->quality = video_st->quality;
 829
 830                                                 // Encode the image
 831                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 832
 833                                                 // If zero size, it means the image was buffered
 834                                                 if (out_size != 0)
 835                                                 {
 836                                                         // write the compressed frame in the media file
 837                                                         // XXX: in case of B frames, the pts is not yet valid
 838                                                         ret = av_write_frame( oc, video_st->index, video_outbuf, out_size );
 839                                                 }
 840                                         }
 841                                         frame_count++;
 842                                         mlt_frame_close( frame );
 843                                 }
 844                                 else
 845                                 {
 846                                         break;
 847                                 }
 848                         }
 849                 }
 850
 851                 if ( real_time_output && frames % 25 == 0 )
 852                 {
 853                         long passed = time_difference( &ante );
 854                         long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
 855                         passed -= pending;
 856                         if ( passed < total_time )
 857                         {
 858                                 long total = ( total_time - passed );
 859                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
 860                                 nanosleep( &t, NULL );
 861                         }
 862                 }
 863         }
 864
 865         // close each codec
 866         if (video_st)
 867                 close_video(oc, video_st);
 868         if (audio_st)
 869                 close_audio(oc, audio_st);
 870
 871         // Write the trailer, if any
 872         av_write_trailer(oc);
 873
 874         // Free the streams
 875         for(i = 0; i < oc->nb_streams; i++)
 876                 av_freep(&oc->streams[i]);
 877
 878         // Close the output file
 879         if (!(fmt->flags & AVFMT_NOFILE))
 880                 url_fclose(&oc->pb);
 881
 882         // Clean up input and output frames
 883         av_free( output->data[0] );
 884         av_free( output );
 885         av_free( input->data[0] );
 886         av_free( input );
 887         av_free( video_outbuf );
 888         av_free( buffer );
 889
 890         // Free the stream
 891         av_free(oc);
 892
 893         // Just in case we terminated on pause
 894         mlt_properties_set_int( properties, "running", 0 );
 895
 896         return NULL;
 897 }
 898
 899 /** Close the consumer.
 900 */
 901
 902 static void consumer_close( mlt_consumer this )
 903 {
 904         // Stop the consumer
 905         mlt_consumer_stop( this );
 906
 907         // Close the parent
 908         mlt_consumer_close( this );
 909
 910         // Free the memory
 911         free( this );
 912 }