git.sesse.net Git - mlt/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 //
  39 // This structure should be extended and made globally available in mlt
  40 //
  41
  42 typedef struct
  43 {
  44         int16_t *buffer;
  45         int size;
  46         int used;
  47         double time;
  48         int frequency;
  49         int channels;
  50 }
  51 *sample_fifo, sample_fifo_s;
  52
  53 sample_fifo sample_fifo_init( int frequency, int channels )
  54 {
  55         sample_fifo this = calloc( 1, sizeof( sample_fifo_s ) );
  56         this->frequency = frequency;
  57         this->channels = channels;
  58         return this;
  59 }
  60
  61 // sample_fifo_clear and check are temporarily aborted (not working as intended)
  62
  63 void sample_fifo_clear( sample_fifo this, double time )
  64 {
  65         int words = ( float )( time - this->time ) * this->frequency * this->channels;
  66         if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) && this->used > words && words > 0 )
  67         {
  68                 memmove( this->buffer, &this->buffer[ words ], ( this->used - words ) * sizeof( int16_t ) );
  69                 this->used -= words;
  70                 this->time = time;
  71         }
  72         else if ( ( int )( ( float )time * 100 ) != ( int )( ( float )this->time * 100 ) )
  73         {
  74                 this->used = 0;
  75                 this->time = time;
  76         }
  77 }
  78
  79 void sample_fifo_check( sample_fifo this, double time )
  80 {
  81         if ( this->used == 0 )
  82         {
  83                 if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) )
  84                         this->time = time;
  85         }
  86 }
  87
  88 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  89 {
  90         if ( ( this->size - this->used ) < count )
  91         {
  92                 this->size += count * 5;
  93                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  94         }
  95
  96         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
  97         this->used += count;
  98 }
  99
 100 int sample_fifo_used( sample_fifo this )
 101 {
 102         return this->used;
 103 }
 104
 105 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
 106 {
 107         if ( count > this->used )
 108                 count = this->used;
 109
 110         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
 111         this->used -= count;
 112         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
 113
 114         this->time += ( double )count / this->channels / this->frequency;
 115
 116         return count;
 117 }
 118
 119 void sample_fifo_close( sample_fifo this )
 120 {
 121         free( this->buffer );
 122         free( this );
 123 }
 124
 125 // Forward references.
 126 static int consumer_start( mlt_consumer this );
 127 static int consumer_stop( mlt_consumer this );
 128 static int consumer_is_stopped( mlt_consumer this );
 129 static void *consumer_thread( void *arg );
 130 static void consumer_close( mlt_consumer this );
 131
 132 /** Initialise the dv consumer.
 133 */
 134
 135 mlt_consumer consumer_avformat_init( char *arg )
 136 {
 137         // Allocate the consumer
 138         mlt_consumer this = mlt_consumer_new( );
 139
 140         // If memory allocated and initialises without error
 141         if ( this != NULL )
 142         {
 143                 // Get properties from the consumer
 144                 mlt_properties properties = mlt_consumer_properties( this );
 145
 146                 // Assign close callback
 147                 this->close = consumer_close;
 148
 149                 // Interpret the argument
 150                 if ( arg != NULL )
 151                         mlt_properties_set( properties, "target", arg );
 152
 153                 // sample and frame queue
 154                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 155
 156                 // Set avformat defaults (all lifted from ffmpeg.c)
 157                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 158                 mlt_properties_set_int( properties, "video_bit_rate", 200 * 1000 );
 159                 mlt_properties_set_int( properties, "video_bit_rate_tolerance", 4000 * 1000 );
 160                 mlt_properties_set_int( properties, "frame_rate_base", 1 );
 161                 mlt_properties_set_int( properties, "gop_size", 12 );
 162                 mlt_properties_set_int( properties, "b_frames", 0 );
 163                 mlt_properties_set_int( properties, "mb_decision", FF_MB_DECISION_SIMPLE );
 164                 mlt_properties_set_double( properties, "qscale", 0 );
 165                 mlt_properties_set_int( properties, "me_method", ME_EPZS );
 166                 mlt_properties_set_int( properties, "mb_cmp", FF_CMP_SAD );
 167                 mlt_properties_set_int( properties, "ildct_cmp", FF_CMP_VSAD );
 168                 mlt_properties_set_int( properties, "sub_cmp", FF_CMP_SAD );
 169                 mlt_properties_set_int( properties, "cmp", FF_CMP_SAD );
 170                 mlt_properties_set_int( properties, "pre_cmp", FF_CMP_SAD );
 171                 mlt_properties_set_int( properties, "pre_me", 0 );
 172                 mlt_properties_set_double( properties, "lumi_mask", 0 );
 173                 mlt_properties_set_double( properties, "dark_mask", 0 );
 174                 mlt_properties_set_double( properties, "scplx_mask", 0 );
 175                 mlt_properties_set_double( properties, "tcplx_mask", 0 );
 176                 mlt_properties_set_double( properties, "p_mask", 0 );
 177                 mlt_properties_set_int( properties, "qns", 0 );
 178                 mlt_properties_set_int( properties, "video_qmin", 2 );
 179                 mlt_properties_set_int( properties, "video_qmax", 31 );
 180                 mlt_properties_set_int( properties, "video_lmin", 2*FF_QP2LAMBDA );
 181                 mlt_properties_set_int( properties, "video_lmax", 31*FF_QP2LAMBDA );
 182                 mlt_properties_set_int( properties, "video_mb_qmin", 2 );
 183                 mlt_properties_set_int( properties, "video_mb_qmax", 31 );
 184                 mlt_properties_set_int( properties, "video_qdiff", 3 );
 185                 mlt_properties_set_double( properties, "video_qblur", 0.5 );
 186                 mlt_properties_set_double( properties, "video_qcomp", 0.5 );
 187                 mlt_properties_set_int( properties, "video_rc_max_rate", 0 );
 188                 mlt_properties_set_int( properties, "video_rc_min_rate", 0 );
 189                 mlt_properties_set_int( properties, "video_rc_buffer_size", 0 );
 190                 mlt_properties_set_double( properties, "video_rc_buffer_aggressivity", 1.0 );
 191                 mlt_properties_set_double( properties, "video_rc_initial_cplx", 0 );
 192                 mlt_properties_set_double( properties, "video_i_qfactor", 1.25 );
 193                 mlt_properties_set_double( properties, "video_b_qfactor", 1.25 );
 194                 mlt_properties_set_double( properties, "video_i_qoffset", -0.8 );
 195                 mlt_properties_set_double( properties, "video_b_qoffset", 0 );
 196                 mlt_properties_set_int( properties, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS );
 197                 mlt_properties_set_int( properties, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS );
 198                 mlt_properties_set_int( properties, "dct_algo", 0 );
 199                 mlt_properties_set_int( properties, "idct_algo", 0 );
 200                 mlt_properties_set_int( properties, "me_threshold", 0 );
 201                 mlt_properties_set_int( properties, "mb_threshold", 0 );
 202                 mlt_properties_set_int( properties, "intra_dc_precision", 0 );
 203                 mlt_properties_set_int( properties, "strict", 0 );
 204                 mlt_properties_set_int( properties, "error_rate", 0 );
 205                 mlt_properties_set_int( properties, "noise_reduction", 0 );
 206                 mlt_properties_set_int( properties, "sc_threshold", 0 );
 207                 mlt_properties_set_int( properties, "me_range", 0 );
 208                 mlt_properties_set_int( properties, "coder", 0 );
 209                 mlt_properties_set_int( properties, "context", 0 );
 210                 mlt_properties_set_int( properties, "predictor", 0 );
 211
 212                 // Ensure termination at end of the stream
 213                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 214
 215                 // Set up start/stop/terminated callbacks
 216                 this->start = consumer_start;
 217                 this->stop = consumer_stop;
 218                 this->is_stopped = consumer_is_stopped;
 219         }
 220
 221         // Return this
 222         return this;
 223 }
 224
 225 /** Start the consumer.
 226 */
 227
 228 static int consumer_start( mlt_consumer this )
 229 {
 230         // Get the properties
 231         mlt_properties properties = mlt_consumer_properties( this );
 232
 233         // Check that we're not already running
 234         if ( !mlt_properties_get_int( properties, "running" ) )
 235         {
 236                 // Allocate a thread
 237                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 238                 pthread_attr_t thread_attributes;
 239
 240                 // Get the width and height
 241                 int width = mlt_properties_get_int( properties, "width" );
 242                 int height = mlt_properties_get_int( properties, "height" );
 243
 244                 // Obtain the size property
 245                 char *size = mlt_properties_get( properties, "size" );
 246
 247                 // Interpret it
 248                 if ( size != NULL )
 249                 {
 250                         int tw, th;
 251                         if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
 252                         {
 253                                 width = tw;
 254                                 height = th;
 255                         }
 256                         else
 257                         {
 258                                 fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
 259                         }
 260                 }
 261
 262                 // Now ensure we honour the multiple of two requested by libavformat
 263                 mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
 264                 mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
 265
 266                 // Assign the thread to properties
 267                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 268
 269                 // Set the running state
 270                 mlt_properties_set_int( properties, "running", 1 );
 271
 272                 // Inherit the scheduling priority
 273                 pthread_attr_init( &thread_attributes );
 274                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 275
 276                 // Create the thread
 277                 pthread_create( thread, &thread_attributes, consumer_thread, this );
 278         }
 279         return 0;
 280 }
 281
 282 /** Stop the consumer.
 283 */
 284
 285 static int consumer_stop( mlt_consumer this )
 286 {
 287         // Get the properties
 288         mlt_properties properties = mlt_consumer_properties( this );
 289
 290         // Check that we're running
 291         if ( mlt_properties_get_int( properties, "running" ) )
 292         {
 293                 // Get the thread
 294                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 295
 296                 // Stop the thread
 297                 mlt_properties_set_int( properties, "running", 0 );
 298
 299                 // Wait for termination
 300                 pthread_join( *thread, NULL );
 301         }
 302
 303         return 0;
 304 }
 305
 306 /** Determine if the consumer is stopped.
 307 */
 308
 309 static int consumer_is_stopped( mlt_consumer this )
 310 {
 311         // Get the properties
 312         mlt_properties properties = mlt_consumer_properties( this );
 313         return !mlt_properties_get_int( properties, "running" );
 314 }
 315
 316 /** Add an audio output stream
 317 */
 318
 319 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 320 {
 321         // Get the properties
 322         mlt_properties properties = mlt_consumer_properties( this );
 323
 324         // Create a new stream
 325         AVStream *st = av_new_stream( oc, 1 );
 326
 327         // If created, then initialise from properties
 328         if ( st != NULL )
 329         {
 330                 AVCodecContext *c = &st->codec;
 331                 c->codec_id = codec_id;
 332                 c->codec_type = CODEC_TYPE_AUDIO;
 333
 334                 // Put sample parameters
 335                 c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 336                 c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 337                 c->channels = mlt_properties_get_int( properties, "channels" );
 338         }
 339         else
 340         {
 341                 fprintf( stderr, "Could not allocate a stream for audio\n" );
 342         }
 343
 344         return st;
 345 }
 346
 347 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 348 {
 349         // We will return the audio input size from here
 350         int audio_input_frame_size = 0;
 351
 352         // Get the context
 353         AVCodecContext *c = &st->codec;
 354
 355         // Find the encoder
 356         AVCodec *codec = avcodec_find_encoder( c->codec_id );
 357
 358         // Continue if codec found and we can open it
 359         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 360         {
 361                 // ugly hack for PCM codecs (will be removed ASAP with new PCM
 362                 // support to compute the input frame size in samples
 363                 if ( c->frame_size <= 1 )
 364                 {
 365                         audio_input_frame_size = audio_outbuf_size / c->channels;
 366                         switch(st->codec.codec_id)
 367                         {
 368                                 case CODEC_ID_PCM_S16LE:
 369                                 case CODEC_ID_PCM_S16BE:
 370                                 case CODEC_ID_PCM_U16LE:
 371                                 case CODEC_ID_PCM_U16BE:
 372                                         audio_input_frame_size >>= 1;
 373                                         break;
 374                                 default:
 375                                         break;
 376                         }
 377                 }
 378                 else
 379                 {
 380                         audio_input_frame_size = c->frame_size;
 381                 }
 382
 383                 // Some formats want stream headers to be seperate (hmm)
 384                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 385                         !strcmp( oc->oformat->name, "mov" ) ||
 386                         !strcmp( oc->oformat->name, "3gp" ) )
 387                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 388         }
 389         else
 390         {
 391                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 392         }
 393
 394         return audio_input_frame_size;
 395 }
 396
 397 static void close_audio( AVFormatContext *oc, AVStream *st )
 398 {
 399         avcodec_close( &st->codec );
 400 }
 401
 402 /** Add a video output stream
 403 */
 404
 405 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 406 {
 407         // Get the properties
 408         mlt_properties properties = mlt_consumer_properties( this );
 409
 410         // Create a new stream
 411         AVStream *st = av_new_stream( oc, 0 );
 412
 413         if ( st != NULL )
 414         {
 415                 AVCodecContext *c = &st->codec;
 416                 c->codec_id = codec_id;
 417                 c->codec_type = CODEC_TYPE_VIDEO;
 418
 419                 // put sample parameters
 420                 c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 421                 c->bit_rate_tolerance = mlt_properties_get_int( properties, "video_bit_rate_tolerance" );
 422                 c->width = mlt_properties_get_int( properties, "width" );
 423                 c->height = mlt_properties_get_int( properties, "height" );
 424                 c->frame_rate = mlt_properties_get_double( properties, "fps" );
 425                 c->frame_rate_base = mlt_properties_get_double( properties, "frame_rate_base" );
 426                 c->frame_rate_base = 1;
 427                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 428
 429                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 430                 {
 431                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 432                         c->b_frame_strategy = 0;
 433                         c->b_quant_factor = 2.0;
 434                 }
 435
 436                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 437                 c->sample_aspect_ratio = av_d2q( mlt_properties_get_double( properties, "aspect_ratio" ), 255 );
 438                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 439                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 440                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 441                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 442                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 443                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 444                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 445                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 446                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 447                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 448                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 449                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 450                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 451                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 452                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 453                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 454                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 455                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 456                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 457                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 458                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 459
 460                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 461                 {
 462                         c->flags |= CODEC_FLAG_QSCALE;
 463                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 464                 }
 465
 466                 // Some formats want stream headers to be seperate (hmm)
 467                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 468                         !strcmp( oc->oformat->name, "mov" ) ||
 469                         !strcmp( oc->oformat->name, "3gp" ) )
 470                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 471
 472                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 473                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 474                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 475                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 476                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 477                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 478                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 479                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 480                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 481                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 482                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 483                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 484                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 485                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 486                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 487                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 488                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 489                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 490                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 491                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 492                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 493                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 494                 c->context_model= mlt_properties_get_int( properties, "context" );
 495                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 496                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 497         }
 498         else
 499         {
 500                 fprintf( stderr, "Could not allocate a stream for video\n" );
 501         }
 502
 503         return st;
 504 }
 505
 506 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 507 {
 508         // Allocate a frame
 509         AVFrame *picture = avcodec_alloc_frame();
 510
 511         // Determine size of the
 512         int size = avpicture_get_size(pix_fmt, width, height);
 513
 514         // Allocate the picture buf
 515         uint8_t *picture_buf = av_malloc(size);
 516
 517         // If we have both, then fill the image
 518         if ( picture != NULL && picture_buf != NULL )
 519         {
 520                 // Fill the frame with the allocated buffer
 521                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 522         }
 523         else
 524         {
 525                 // Something failed - clean up what we can
 526                 av_free( picture );
 527                 av_free( picture_buf );
 528                 picture = NULL;
 529         }
 530
 531         return picture;
 532 }
 533
 534 static int open_video(AVFormatContext *oc, AVStream *st)
 535 {
 536         // Get the codec
 537         AVCodecContext *c = &st->codec;
 538
 539         // find the video encoder
 540         AVCodec *codec = avcodec_find_encoder(c->codec_id);
 541
 542         // Open the codec safely
 543         return codec != NULL && avcodec_open(c, codec) >= 0;
 544 }
 545
 546 void close_video(AVFormatContext *oc, AVStream *st)
 547 {
 548         avcodec_close(&st->codec);
 549 }
 550
 551 static inline long time_difference( struct timeval *time1 )
 552 {
 553         struct timeval time2;
 554         gettimeofday( &time2, NULL );
 555         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 556 }
 557
 558 /** The main thread - the argument is simply the consumer.
 559 */
 560
 561 static void *consumer_thread( void *arg )
 562 {
 563         // Map the argument to the object
 564         mlt_consumer this = arg;
 565
 566         // Get the properties
 567         mlt_properties properties = mlt_consumer_properties( this );
 568
 569         // Get the terminate on pause property
 570         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 571         int terminated = 0;
 572
 573         // Determine if feed is slow (for realtime stuff)
 574         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 575
 576         // Time structures
 577         struct timeval ante;
 578
 579         // Get the frame rate
 580         int fps = mlt_properties_get_double( properties, "fps" );
 581
 582         // Get width and height
 583         int width = mlt_properties_get_int( properties, "width" );
 584         int height = mlt_properties_get_int( properties, "height" );
 585         int img_width = width;
 586         int img_height = height;
 587
 588         // Get default audio properties
 589         mlt_audio_format aud_fmt = mlt_audio_pcm;
 590         int channels = mlt_properties_get_int( properties, "channels" );
 591         int frequency = mlt_properties_get_int( properties, "frequency" );
 592         int16_t *pcm = NULL;
 593         int samples = 0;
 594
 595         // AVFormat audio buffer and frame size
 596         int audio_outbuf_size = 10000;
 597         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 598         int audio_input_frame_size = 0;
 599
 600         // AVFormat video buffer and frame count
 601         int frame_count = 0;
 602         int video_outbuf_size = ( 1024 * 1024 );
 603         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 604
 605         // Used for the frame properties
 606         mlt_frame frame = NULL;
 607         mlt_properties frame_properties = NULL;
 608
 609         // Get the queues
 610         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 611         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 612
 613         // Need two av pictures for converting
 614         AVFrame *output = alloc_picture( PIX_FMT_YUV420P, width, height );
 615         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 616
 617         // For receiving images from an mlt_frame
 618         uint8_t *image;
 619         mlt_image_format img_fmt = mlt_image_yuv422;
 620
 621         // For receiving audio samples back from the fifo
 622         int16_t *buffer = av_malloc( 48000 * 2 );
 623         int count = 0;
 624
 625         // Allocate the context
 626         AVFormatContext *oc = av_alloc_format_context( );
 627
 628         // Streams
 629         AVStream *audio_st = NULL;
 630         AVStream *video_st = NULL;
 631
 632         // Time stamps
 633         double audio_pts, video_pts;
 634
 635         // Loop variable
 636         int i;
 637
 638         // Frames despatched
 639         long int frames = 0;
 640         long int total_time = 0;
 641
 642         // Determine the format
 643         AVOutputFormat *fmt = NULL;
 644         char *filename = mlt_properties_get( properties, "target" );
 645         char *format = mlt_properties_get( properties, "format" );
 646         char *vcodec = mlt_properties_get( properties, "vcodec" );
 647         char *acodec = mlt_properties_get( properties, "acodec" );
 648
 649         // Used to store and override codec ids
 650         int audio_codec_id;
 651         int video_codec_id;
 652
 653         // Check for user selected format first
 654         if ( format != NULL )
 655                 fmt = guess_format( format, NULL, NULL );
 656
 657         // Otherwise check on the filename
 658         if ( fmt == NULL && filename != NULL )
 659                 fmt = guess_format( NULL, filename, NULL );
 660
 661         // Otherwise default to mpeg
 662         if ( fmt == NULL )
 663                 fmt = guess_format( "mpeg", NULL, NULL );
 664
 665         // We need a filename - default to stdout?
 666         if ( filename == NULL || !strcmp( filename, "" ) )
 667                 filename = "pipe:";
 668
 669         // Get the codec ids selected
 670         audio_codec_id = fmt->audio_codec;
 671         video_codec_id = fmt->video_codec;
 672
 673         // Check for audio codec overides
 674         if ( acodec != NULL )
 675         {
 676                 AVCodec *p = first_avcodec;
 677                 while( p != NULL )
 678                 {
 679                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 680                                 break;
 681                         p = p->next;
 682                 }
 683                 if ( p != NULL )
 684                         audio_codec_id = p->id;
 685                 else
 686                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 687         }
 688
 689         // Check for video codec overides
 690         if ( vcodec != NULL )
 691         {
 692                 AVCodec *p = first_avcodec;
 693                 while( p != NULL )
 694                 {
 695                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 696                                 break;
 697                         p = p->next;
 698                 }
 699                 if ( p != NULL )
 700                         video_codec_id = p->id;
 701                 else
 702                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 703         }
 704
 705         // Update the output context
 706         oc->oformat = fmt;
 707         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 708
 709         // Add audio and video streams
 710         if ( fmt->video_codec != CODEC_ID_NONE )
 711                 video_st = add_video_stream( this, oc, video_codec_id );
 712         if ( fmt->audio_codec != CODEC_ID_NONE )
 713                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 714
 715         // Set the parameters (even though we have none...)
 716         if ( av_set_parameters(oc, NULL) >= 0 )
 717         {
 718                 if ( video_st && !open_video( oc, video_st ) )
 719                         video_st = NULL;
 720                 if ( audio_st )
 721                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 722
 723                 // Open the output file, if needed
 724                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 725                 {
 726                         if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 727                         {
 728                                 fprintf(stderr, "Could not open '%s'\n", filename);
 729                                 mlt_properties_set_int( properties, "running", 0 );
 730                         }
 731                 }
 732
 733                 // Write the stream header, if any
 734                 if ( mlt_properties_get_int( properties, "running" ) )
 735                         av_write_header( oc );
 736         }
 737         else
 738         {
 739                 fprintf(stderr, "Invalid output format parameters\n");
 740                 mlt_properties_set_int( properties, "running", 0 );
 741         }
 742
 743         // Last check - need at least one stream
 744         if ( audio_st == NULL && video_st == NULL )
 745                 mlt_properties_set_int( properties, "running", 0 );
 746
 747         // Get the starting time (can ignore the times above)
 748         gettimeofday( &ante, NULL );
 749
 750         // Loop while running
 751         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 752         {
 753                 // Get the frame
 754                 frame = mlt_consumer_rt_frame( this );
 755
 756                 // Check that we have a frame to work with
 757                 if ( frame != NULL )
 758                 {
 759                         // Increment frames despatched
 760                         frames ++;
 761
 762                         // Default audio args
 763                         frame_properties = mlt_frame_properties( frame );
 764
 765                         // Check for the terminated condition
 766                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 767
 768                         // Get audio and append to the fifo
 769                         if ( audio_st )
 770                         {
 771                                 samples = mlt_sample_calculator( fps, frequency, count );
 772                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 773
 774                                 // Create the fifo if we don't have one
 775                                 if ( fifo == NULL )
 776                                 {
 777                                         fifo = sample_fifo_init( frequency, channels );
 778                                         mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
 779                                 }
 780
 781                                 // Append the samples
 782                                 sample_fifo_append( fifo, pcm, samples * channels );
 783                                 total_time += ( samples * 1000000 ) / frequency;
 784                         }
 785
 786                         // Encode the image
 787                         if ( video_st )
 788                                 mlt_deque_push_back( queue, frame );
 789                         else
 790                                 mlt_frame_close( frame );
 791                 }
 792
 793                 // While we have stuff to process, process...
 794                 while ( 1 )
 795                 {
 796                         // Compute current audio and video time
 797                         if (audio_st)
 798                                 audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 799                         else
 800                                 audio_pts = 0.0;
 801
 802                         if (video_st)
 803                                 video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
 804                         else
 805                                 video_pts = 0.0;
 806
 807                         // Write interleaved audio and video frames
 808                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 809                         {
 810                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 811                                 {
 812                                         AVCodecContext *c;
 813                                         AVPacket pkt;
 814                                         av_init_packet( &pkt );
 815
 816                                         c = &audio_st->codec;
 817
 818                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 819
 820                                         pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 821                                         // Write the compressed frame in the media file
 822                                         pkt.pts= c->coded_frame->pts;
 823                                         pkt.flags |= PKT_FLAG_KEY;
 824                                         pkt.stream_index= audio_st->index;
 825                                         pkt.data= audio_outbuf;
 826
 827                                         if ( av_write_frame( oc, &pkt ) != 0)
 828                                                 fprintf(stderr, "Error while writing audio frame\n");
 829                                 }
 830                                 else
 831                                 {
 832                                         break;
 833                                 }
 834                         }
 835                         else if ( video_st )
 836                         {
 837                                 if ( mlt_deque_count( queue ) )
 838                                 {
 839                                         int out_size, ret;
 840                                         AVCodecContext *c;
 841
 842                                         frame = mlt_deque_pop_front( queue );
 843                                         frame_properties = mlt_frame_properties( frame );
 844
 845                                         c = &video_st->codec;
 846
 847                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 848                                         {
 849                                                 int i = 0;
 850                                                 int j = 0;
 851                                                 uint8_t *p;
 852                                                 uint8_t *q;
 853
 854                                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 855                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 856
 857                                                 q = image;
 858
 859                                                 for ( i = 0; i < height; i ++ )
 860                                                 {
 861                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 862                                                         j = width;
 863                                                         while( j -- )
 864                                                         {
 865                                                                 *p ++ = *q ++;
 866                                                                 *p ++ = *q ++;
 867                                                         }
 868                                                 }
 869
 870                                                 img_convert( ( AVPicture * )output, PIX_FMT_YUV420P, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 871                                         }
 872
 873                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 874                                         {
 875                                                 // raw video case. The API will change slightly in the near future for that
 876                                                 AVPacket pkt;
 877                                                 av_init_packet(&pkt);
 878
 879                                                 pkt.flags |= PKT_FLAG_KEY;
 880                                                 pkt.stream_index= video_st->index;
 881                                                 pkt.data= (uint8_t *)output;
 882                                                 pkt.size= sizeof(AVPicture);
 883
 884                                                 ret = av_write_frame(oc, &pkt);
 885                                         }
 886                                         else
 887                                         {
 888                                                 // Set the quality
 889                                                 output->quality = video_st->quality;
 890
 891                                                 // Encode the image
 892                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 893
 894                                                 // If zero size, it means the image was buffered
 895                                                 if (out_size != 0)
 896                                                 {
 897                                                         AVPacket pkt;
 898                                                         av_init_packet( &pkt );
 899
 900                                                         pkt.pts= c->coded_frame->pts;
 901                                                         if(c->coded_frame->key_frame)
 902                                                                 pkt.flags |= PKT_FLAG_KEY;
 903                                                         pkt.stream_index= video_st->index;
 904                                                         pkt.data= video_outbuf;
 905                                                         pkt.size= out_size;
 906
 907                                         // write the compressed frame in the media file
 908                                                         ret = av_write_frame(oc, &pkt);
 909                                                 }
 910                                         }
 911                                         frame_count++;
 912                                         mlt_frame_close( frame );
 913                                 }
 914                                 else
 915                                 {
 916                                         break;
 917                                 }
 918                         }
 919                 }
 920
 921                 if ( real_time_output && frames % 25 == 0 )
 922                 {
 923                         long passed = time_difference( &ante );
 924                         if ( fifo != NULL )
 925                         {
 926                                 long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
 927                                 passed -= pending;
 928                         }
 929                         if ( passed < total_time )
 930                         {
 931                                 long total = ( total_time - passed );
 932                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
 933                                 nanosleep( &t, NULL );
 934                         }
 935                 }
 936         }
 937
 938         // close each codec
 939         if (video_st)
 940                 close_video(oc, video_st);
 941         if (audio_st)
 942                 close_audio(oc, audio_st);
 943
 944         // Write the trailer, if any
 945         av_write_trailer(oc);
 946
 947         // Free the streams
 948         for(i = 0; i < oc->nb_streams; i++)
 949                 av_freep(&oc->streams[i]);
 950
 951         // Close the output file
 952         if (!(fmt->flags & AVFMT_NOFILE))
 953                 url_fclose(&oc->pb);
 954
 955         // Clean up input and output frames
 956         av_free( output->data[0] );
 957         av_free( output );
 958         av_free( input->data[0] );
 959         av_free( input );
 960         av_free( video_outbuf );
 961         av_free( buffer );
 962
 963         // Free the stream
 964         av_free(oc);
 965
 966         // Just in case we terminated on pause
 967         mlt_properties_set_int( properties, "running", 0 );
 968
 969         mlt_consumer_stopped( this );
 970
 971         return NULL;
 972 }
 973
 974 /** Close the consumer.
 975 */
 976
 977 static void consumer_close( mlt_consumer this )
 978 {
 979         // Stop the consumer
 980         mlt_consumer_stop( this );
 981
 982         // Close the parent
 983         mlt_consumer_close( this );
 984
 985         // Free the memory
 986         free( this );
 987 }