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 <limits.h>
  32 #include <pthread.h>
  33 #include <sys/time.h>
  34 #include <math.h>
  35
  36 // avformat header files
  37 #include <avformat.h>
  38
  39 //
  40 // This structure should be extended and made globally available in mlt
  41 //
  42
  43 typedef struct
  44 {
  45         int16_t *buffer;
  46         int size;
  47         int used;
  48         double time;
  49         int frequency;
  50         int channels;
  51 }
  52 *sample_fifo, sample_fifo_s;
  53
  54 sample_fifo sample_fifo_init( int frequency, int channels )
  55 {
  56         sample_fifo this = calloc( 1, sizeof( sample_fifo_s ) );
  57         this->frequency = frequency;
  58         this->channels = channels;
  59         return this;
  60 }
  61
  62 // sample_fifo_clear and check are temporarily aborted (not working as intended)
  63
  64 void sample_fifo_clear( sample_fifo this, double time )
  65 {
  66         int words = ( float )( time - this->time ) * this->frequency * this->channels;
  67         if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) && this->used > words && words > 0 )
  68         {
  69                 memmove( this->buffer, &this->buffer[ words ], ( this->used - words ) * sizeof( int16_t ) );
  70                 this->used -= words;
  71                 this->time = time;
  72         }
  73         else if ( ( int )( ( float )time * 100 ) != ( int )( ( float )this->time * 100 ) )
  74         {
  75                 this->used = 0;
  76                 this->time = time;
  77         }
  78 }
  79
  80 void sample_fifo_check( sample_fifo this, double time )
  81 {
  82         if ( this->used == 0 )
  83         {
  84                 if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) )
  85                         this->time = time;
  86         }
  87 }
  88
  89 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  90 {
  91         if ( ( this->size - this->used ) < count )
  92         {
  93                 this->size += count * 5;
  94                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  95         }
  96
  97         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
  98         this->used += count;
  99 }
 100
 101 int sample_fifo_used( sample_fifo this )
 102 {
 103         return this->used;
 104 }
 105
 106 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
 107 {
 108         if ( count > this->used )
 109                 count = this->used;
 110
 111         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
 112         this->used -= count;
 113         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
 114
 115         this->time += ( double )count / this->channels / this->frequency;
 116
 117         return count;
 118 }
 119
 120 void sample_fifo_close( sample_fifo this )
 121 {
 122         free( this->buffer );
 123         free( this );
 124 }
 125
 126 // Forward references.
 127 static int consumer_start( mlt_consumer this );
 128 static int consumer_stop( mlt_consumer this );
 129 static int consumer_is_stopped( mlt_consumer this );
 130 static void *consumer_thread( void *arg );
 131 static void consumer_close( mlt_consumer this );
 132
 133 /** Initialise the dv consumer.
 134 */
 135
 136 mlt_consumer consumer_avformat_init( char *arg )
 137 {
 138         // Allocate the consumer
 139         mlt_consumer this = mlt_consumer_new( );
 140
 141         // If memory allocated and initialises without error
 142         if ( this != NULL )
 143         {
 144                 // Get properties from the consumer
 145                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 146
 147                 // Assign close callback
 148                 this->close = consumer_close;
 149
 150                 // Interpret the argument
 151                 if ( arg != NULL )
 152                         mlt_properties_set( properties, "target", arg );
 153
 154                 // sample and frame queue
 155                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 156
 157                 // Set avformat defaults (all lifted from ffmpeg.c)
 158                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 159                 mlt_properties_set_int( properties, "video_bit_rate", 200 * 1000 );
 160                 mlt_properties_set_int( properties, "video_bit_rate_tolerance", 4000 * 1000 );
 161                 mlt_properties_set_int( properties, "frame_rate_base", 1 );
 162                 mlt_properties_set_int( properties, "gop_size", 12 );
 163                 mlt_properties_set_int( properties, "b_frames", 0 );
 164                 mlt_properties_set_int( properties, "mb_decision", FF_MB_DECISION_SIMPLE );
 165                 mlt_properties_set_double( properties, "qscale", 0 );
 166                 mlt_properties_set_int( properties, "me_method", ME_EPZS );
 167                 mlt_properties_set_int( properties, "mb_cmp", FF_CMP_SAD );
 168                 mlt_properties_set_int( properties, "ildct_cmp", FF_CMP_VSAD );
 169                 mlt_properties_set_int( properties, "sub_cmp", FF_CMP_SAD );
 170                 mlt_properties_set_int( properties, "cmp", FF_CMP_SAD );
 171                 mlt_properties_set_int( properties, "pre_cmp", FF_CMP_SAD );
 172                 mlt_properties_set_int( properties, "pre_me", 0 );
 173                 mlt_properties_set_double( properties, "lumi_mask", 0 );
 174                 mlt_properties_set_double( properties, "dark_mask", 0 );
 175                 mlt_properties_set_double( properties, "scplx_mask", 0 );
 176                 mlt_properties_set_double( properties, "tcplx_mask", 0 );
 177                 mlt_properties_set_double( properties, "p_mask", 0 );
 178                 mlt_properties_set_int( properties, "qns", 0 );
 179                 mlt_properties_set_int( properties, "video_qmin", 2 );
 180                 mlt_properties_set_int( properties, "video_qmax", 31 );
 181                 mlt_properties_set_int( properties, "video_lmin", 2*FF_QP2LAMBDA );
 182                 mlt_properties_set_int( properties, "video_lmax", 31*FF_QP2LAMBDA );
 183                 mlt_properties_set_int( properties, "video_mb_qmin", 2 );
 184                 mlt_properties_set_int( properties, "video_mb_qmax", 31 );
 185                 mlt_properties_set_int( properties, "video_qdiff", 3 );
 186                 mlt_properties_set_double( properties, "video_qblur", 0.5 );
 187                 mlt_properties_set_double( properties, "video_qcomp", 0.5 );
 188                 mlt_properties_set_int( properties, "video_rc_max_rate", 0 );
 189                 mlt_properties_set_int( properties, "video_rc_min_rate", 0 );
 190                 mlt_properties_set_int( properties, "video_rc_buffer_size", 0 );
 191                 mlt_properties_set_double( properties, "video_rc_buffer_aggressivity", 1.0 );
 192                 mlt_properties_set_double( properties, "video_rc_initial_cplx", 0 );
 193                 mlt_properties_set_double( properties, "video_i_qfactor", 1.25 );
 194                 mlt_properties_set_double( properties, "video_b_qfactor", 1.25 );
 195                 mlt_properties_set_double( properties, "video_i_qoffset", -0.8 );
 196                 mlt_properties_set_double( properties, "video_b_qoffset", 0 );
 197                 mlt_properties_set_int( properties, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS );
 198                 mlt_properties_set_int( properties, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS );
 199                 mlt_properties_set_int( properties, "dct_algo", 0 );
 200                 mlt_properties_set_int( properties, "idct_algo", 0 );
 201                 mlt_properties_set_int( properties, "me_threshold", 0 );
 202                 mlt_properties_set_int( properties, "mb_threshold", 0 );
 203                 mlt_properties_set_int( properties, "intra_dc_precision", 0 );
 204                 mlt_properties_set_int( properties, "strict", 0 );
 205                 mlt_properties_set_int( properties, "error_rate", 0 );
 206                 mlt_properties_set_int( properties, "noise_reduction", 0 );
 207                 mlt_properties_set_int( properties, "sc_threshold", 0 );
 208                 mlt_properties_set_int( properties, "me_range", 0 );
 209                 mlt_properties_set_int( properties, "coder", 0 );
 210                 mlt_properties_set_int( properties, "context", 0 );
 211                 mlt_properties_set_int( properties, "predictor", 0 );
 212
 213                 // Ensure termination at end of the stream
 214                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 215
 216                 // Set up start/stop/terminated callbacks
 217                 this->start = consumer_start;
 218                 this->stop = consumer_stop;
 219                 this->is_stopped = consumer_is_stopped;
 220         }
 221
 222         // Return this
 223         return this;
 224 }
 225
 226 /** Start the consumer.
 227 */
 228
 229 static int consumer_start( mlt_consumer this )
 230 {
 231         // Get the properties
 232         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 233
 234         // Check that we're not already running
 235         if ( !mlt_properties_get_int( properties, "running" ) )
 236         {
 237                 // Allocate a thread
 238                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 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                 // Create the thread
 273                 pthread_create( thread, NULL, consumer_thread, this );
 274         }
 275         return 0;
 276 }
 277
 278 /** Stop the consumer.
 279 */
 280
 281 static int consumer_stop( mlt_consumer this )
 282 {
 283         // Get the properties
 284         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 285
 286         // Check that we're running
 287         if ( mlt_properties_get_int( properties, "running" ) )
 288         {
 289                 // Get the thread
 290                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 291
 292                 // Stop the thread
 293                 mlt_properties_set_int( properties, "running", 0 );
 294
 295                 // Wait for termination
 296                 pthread_join( *thread, NULL );
 297         }
 298
 299         return 0;
 300 }
 301
 302 /** Determine if the consumer is stopped.
 303 */
 304
 305 static int consumer_is_stopped( mlt_consumer this )
 306 {
 307         // Get the properties
 308         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 309         return !mlt_properties_get_int( properties, "running" );
 310 }
 311
 312 /** Add an audio output stream
 313 */
 314
 315 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 316 {
 317         // Get the properties
 318         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 319
 320         // Create a new stream
 321         AVStream *st = av_new_stream( oc, 1 );
 322
 323         // If created, then initialise from properties
 324         if ( st != NULL )
 325         {
 326                 AVCodecContext *c = &st->codec;
 327                 c->codec_id = codec_id;
 328                 c->codec_type = CODEC_TYPE_AUDIO;
 329
 330                 // Put sample parameters
 331                 c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 332                 c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 333                 c->channels = mlt_properties_get_int( properties, "channels" );
 334         }
 335         else
 336         {
 337                 fprintf( stderr, "Could not allocate a stream for audio\n" );
 338         }
 339
 340         return st;
 341 }
 342
 343 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 344 {
 345         // We will return the audio input size from here
 346         int audio_input_frame_size = 0;
 347
 348         // Get the context
 349         AVCodecContext *c = &st->codec;
 350
 351         // Find the encoder
 352         AVCodec *codec = avcodec_find_encoder( c->codec_id );
 353
 354         // Continue if codec found and we can open it
 355         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 356         {
 357                 // ugly hack for PCM codecs (will be removed ASAP with new PCM
 358                 // support to compute the input frame size in samples
 359                 if ( c->frame_size <= 1 )
 360                 {
 361                         audio_input_frame_size = audio_outbuf_size / c->channels;
 362                         switch(st->codec.codec_id)
 363                         {
 364                                 case CODEC_ID_PCM_S16LE:
 365                                 case CODEC_ID_PCM_S16BE:
 366                                 case CODEC_ID_PCM_U16LE:
 367                                 case CODEC_ID_PCM_U16BE:
 368                                         audio_input_frame_size >>= 1;
 369                                         break;
 370                                 default:
 371                                         break;
 372                         }
 373                 }
 374                 else
 375                 {
 376                         audio_input_frame_size = c->frame_size;
 377                 }
 378
 379                 // Some formats want stream headers to be seperate (hmm)
 380                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 381                         !strcmp( oc->oformat->name, "mov" ) ||
 382                         !strcmp( oc->oformat->name, "3gp" ) )
 383                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 384         }
 385         else
 386         {
 387                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 388         }
 389
 390         return audio_input_frame_size;
 391 }
 392
 393 static void close_audio( AVFormatContext *oc, AVStream *st )
 394 {
 395         avcodec_close( &st->codec );
 396 }
 397
 398 /** Add a video output stream
 399 */
 400
 401 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 402 {
 403         // Get the properties
 404         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 405
 406         // Create a new stream
 407         AVStream *st = av_new_stream( oc, 0 );
 408
 409         if ( st != NULL )
 410         {
 411                 AVCodecContext *c = &st->codec;
 412                 c->codec_id = codec_id;
 413                 c->codec_type = CODEC_TYPE_VIDEO;
 414
 415                 // put sample parameters
 416                 c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 417                 c->bit_rate_tolerance = mlt_properties_get_int( properties, "video_bit_rate_tolerance" );
 418                 c->width = mlt_properties_get_int( properties, "width" );
 419                 c->height = mlt_properties_get_int( properties, "height" );
 420                 c->time_base.den = mlt_properties_get_int( properties, "frame_rate_den" );
 421                 c->time_base.num = mlt_properties_get_int( properties, "frame_rate_num" );
 422                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 423                 c->pix_fmt = PIX_FMT_YUV420P;
 424
 425                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 426                 {
 427                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 428                         c->b_frame_strategy = 0;
 429                         c->b_quant_factor = 2.0;
 430                 }
 431
 432                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 433                 c->sample_aspect_ratio = av_d2q( mlt_properties_get_double( properties, "aspect_ratio" ), 255 );
 434                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 435                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 436                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 437                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 438                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 439                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 440                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 441                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 442                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 443                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 444                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 445                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 446                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 447                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 448                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 449                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 450                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 451                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 452                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 453                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 454                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 455
 456                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 457                 {
 458                         c->flags |= CODEC_FLAG_QSCALE;
 459                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 460                 }
 461
 462                 // Some formats want stream headers to be seperate (hmm)
 463                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 464                         !strcmp( oc->oformat->name, "mov" ) ||
 465                         !strcmp( oc->oformat->name, "3gp" ) )
 466                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 467
 468                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 469                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 470                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 471                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 472                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 473                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 474                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 475                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 476                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 477                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 478                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 479                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 480                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 481                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 482                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 483                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 484                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 485                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 486                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 487                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 488                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 489                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 490                 c->context_model= mlt_properties_get_int( properties, "context" );
 491                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 492                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 493         }
 494         else
 495         {
 496                 fprintf( stderr, "Could not allocate a stream for video\n" );
 497         }
 498
 499         return st;
 500 }
 501
 502 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 503 {
 504         // Allocate a frame
 505         AVFrame *picture = avcodec_alloc_frame();
 506
 507         // Determine size of the
 508         int size = avpicture_get_size(pix_fmt, width, height);
 509
 510         // Allocate the picture buf
 511         uint8_t *picture_buf = av_malloc(size);
 512
 513         // If we have both, then fill the image
 514         if ( picture != NULL && picture_buf != NULL )
 515         {
 516                 // Fill the frame with the allocated buffer
 517                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 518         }
 519         else
 520         {
 521                 // Something failed - clean up what we can
 522                 av_free( picture );
 523                 av_free( picture_buf );
 524                 picture = NULL;
 525         }
 526
 527         return picture;
 528 }
 529
 530 static int open_video(AVFormatContext *oc, AVStream *st)
 531 {
 532         // Get the codec
 533         AVCodecContext *video_enc = &st->codec;
 534
 535         // find the video encoder
 536         AVCodec *codec = avcodec_find_encoder( video_enc->codec_id );
 537
 538         if( codec && codec->supported_framerates )
 539         {
 540                 const AVRational *p = codec->supported_framerates;
 541                 AVRational req = ( AVRational ){ video_enc->time_base.den, video_enc->time_base.num };
 542                 const AVRational *best = NULL;
 543                 AVRational best_error = (AVRational){ INT_MAX, 1 };
 544                 for( ; p->den!=0; p++ )
 545                 {
 546                         AVRational error= av_sub_q( req, *p );
 547                         if( error.num < 0 )
 548                                 error.num *= -1;
 549                         if( av_cmp_q( error, best_error ) < 0 )
 550                         {
 551                                 best_error = error;
 552                                 best = p;
 553                         }
 554                 }
 555                 video_enc->time_base.den = best->num;
 556                 video_enc->time_base.num = best->den;
 557         }
 558
 559         if( codec && codec->pix_fmts )
 560         {
 561                 const enum PixelFormat *p = codec->pix_fmts;
 562                 for( ; *p!=-1; p++ )
 563                 {
 564                         if( *p == video_enc->pix_fmt )
 565                                 break;
 566                 }
 567                 if( *p == -1 )
 568                         video_enc->pix_fmt = codec->pix_fmts[ 0 ];
 569         }
 570
 571         // Open the codec safely
 572         return codec != NULL && avcodec_open( video_enc, codec ) >= 0;
 573 }
 574
 575 void close_video(AVFormatContext *oc, AVStream *st)
 576 {
 577         avcodec_close(&st->codec);
 578 }
 579
 580 static inline long time_difference( struct timeval *time1 )
 581 {
 582         struct timeval time2;
 583         gettimeofday( &time2, NULL );
 584         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 585 }
 586
 587 /** The main thread - the argument is simply the consumer.
 588 */
 589
 590 static void *consumer_thread( void *arg )
 591 {
 592         // Map the argument to the object
 593         mlt_consumer this = arg;
 594
 595         // Get the properties
 596         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 597
 598         // Get the terminate on pause property
 599         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 600         int terminated = 0;
 601
 602         // Determine if feed is slow (for realtime stuff)
 603         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 604
 605         // Time structures
 606         struct timeval ante;
 607
 608         // Get the frame rate
 609         int fps = mlt_properties_get_double( properties, "fps" );
 610
 611         // Get width and height
 612         int width = mlt_properties_get_int( properties, "width" );
 613         int height = mlt_properties_get_int( properties, "height" );
 614         int img_width = width;
 615         int img_height = height;
 616
 617         // Get default audio properties
 618         mlt_audio_format aud_fmt = mlt_audio_pcm;
 619         int channels = mlt_properties_get_int( properties, "channels" );
 620         int frequency = mlt_properties_get_int( properties, "frequency" );
 621         int16_t *pcm = NULL;
 622         int samples = 0;
 623
 624         // AVFormat audio buffer and frame size
 625         int audio_outbuf_size = 10000;
 626         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 627         int audio_input_frame_size = 0;
 628
 629         // AVFormat video buffer and frame count
 630         int frame_count = 0;
 631         int video_outbuf_size = ( 1024 * 1024 );
 632         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 633
 634         // Used for the frame properties
 635         mlt_frame frame = NULL;
 636         mlt_properties frame_properties = NULL;
 637
 638         // Get the queues
 639         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 640         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 641
 642         // Need two av pictures for converting
 643         AVFrame *output = NULL;
 644         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 645
 646         // For receiving images from an mlt_frame
 647         uint8_t *image;
 648         mlt_image_format img_fmt = mlt_image_yuv422;
 649
 650         // For receiving audio samples back from the fifo
 651         int16_t *buffer = av_malloc( 48000 * 2 );
 652         int count = 0;
 653
 654         // Allocate the context
 655         AVFormatContext *oc = av_alloc_format_context( );
 656
 657         // Streams
 658         AVStream *audio_st = NULL;
 659         AVStream *video_st = NULL;
 660
 661         // Time stamps
 662         double audio_pts = 0;
 663         double video_pts = 0;
 664
 665         // Loop variable
 666         int i;
 667
 668         // Frames despatched
 669         long int frames = 0;
 670         long int total_time = 0;
 671
 672         // Determine the format
 673         AVOutputFormat *fmt = NULL;
 674         char *filename = mlt_properties_get( properties, "target" );
 675         char *format = mlt_properties_get( properties, "format" );
 676         char *vcodec = mlt_properties_get( properties, "vcodec" );
 677         char *acodec = mlt_properties_get( properties, "acodec" );
 678
 679         // Used to store and override codec ids
 680         int audio_codec_id;
 681         int video_codec_id;
 682
 683         // Check for user selected format first
 684         if ( format != NULL )
 685                 fmt = guess_format( format, NULL, NULL );
 686
 687         // Otherwise check on the filename
 688         if ( fmt == NULL && filename != NULL )
 689                 fmt = guess_format( NULL, filename, NULL );
 690
 691         // Otherwise default to mpeg
 692         if ( fmt == NULL )
 693                 fmt = guess_format( "mpeg", NULL, NULL );
 694
 695         // We need a filename - default to stdout?
 696         if ( filename == NULL || !strcmp( filename, "" ) )
 697                 filename = "pipe:";
 698
 699         // Get the codec ids selected
 700         audio_codec_id = fmt->audio_codec;
 701         video_codec_id = fmt->video_codec;
 702
 703         // Check for audio codec overides
 704         if ( acodec != NULL )
 705         {
 706                 AVCodec *p = first_avcodec;
 707                 while( p != NULL )
 708                 {
 709                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 710                                 break;
 711                         p = p->next;
 712                 }
 713                 if ( p != NULL )
 714                         audio_codec_id = p->id;
 715                 else
 716                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 717         }
 718
 719         // Check for video codec overides
 720         if ( vcodec != NULL )
 721         {
 722                 AVCodec *p = first_avcodec;
 723                 while( p != NULL )
 724                 {
 725                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 726                                 break;
 727                         p = p->next;
 728                 }
 729                 if ( p != NULL )
 730                         video_codec_id = p->id;
 731                 else
 732                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 733         }
 734
 735         // Update the output context
 736         oc->oformat = fmt;
 737         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 738
 739         // Add audio and video streams
 740         if ( fmt->video_codec != CODEC_ID_NONE )
 741                 video_st = add_video_stream( this, oc, video_codec_id );
 742         if ( fmt->audio_codec != CODEC_ID_NONE )
 743                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 744
 745         // Set the parameters (even though we have none...)
 746         if ( av_set_parameters(oc, NULL) >= 0 )
 747         {
 748                 if ( video_st && !open_video( oc, video_st ) )
 749                         video_st = NULL;
 750                 if ( audio_st )
 751                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 752
 753                 // Open the output file, if needed
 754                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 755                 {
 756                         if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 757                         {
 758                                 fprintf(stderr, "Could not open '%s'\n", filename);
 759                                 mlt_properties_set_int( properties, "running", 0 );
 760                         }
 761                 }
 762
 763                 // Write the stream header, if any
 764                 if ( mlt_properties_get_int( properties, "running" ) )
 765                         av_write_header( oc );
 766         }
 767         else
 768         {
 769                 fprintf(stderr, "Invalid output format parameters\n");
 770                 mlt_properties_set_int( properties, "running", 0 );
 771         }
 772
 773         // Allocate picture
 774         if ( video_st )
 775                 output = alloc_picture( video_st->codec.pix_fmt, width, height );
 776
 777         // Last check - need at least one stream
 778         if ( audio_st == NULL && video_st == NULL )
 779                 mlt_properties_set_int( properties, "running", 0 );
 780
 781         // Get the starting time (can ignore the times above)
 782         gettimeofday( &ante, NULL );
 783
 784         // Loop while running
 785         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 786         {
 787                 // Get the frame
 788                 frame = mlt_consumer_rt_frame( this );
 789
 790                 // Check that we have a frame to work with
 791                 if ( frame != NULL )
 792                 {
 793                         // Increment frames despatched
 794                         frames ++;
 795
 796                         // Default audio args
 797                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 798
 799                         // Check for the terminated condition
 800                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 801
 802                         // Get audio and append to the fifo
 803                         if ( !terminated && audio_st )
 804                         {
 805                                 samples = mlt_sample_calculator( fps, frequency, count );
 806                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 807
 808                                 // Create the fifo if we don't have one
 809                                 if ( fifo == NULL )
 810                                 {
 811                                         fifo = sample_fifo_init( frequency, channels );
 812                                         mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
 813                                 }
 814
 815                                 if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
 816                                         memset( pcm, 0, samples * channels * 2 );
 817
 818                                 // Append the samples
 819                                 sample_fifo_append( fifo, pcm, samples * channels );
 820                                 total_time += ( samples * 1000000 ) / frequency;
 821                         }
 822
 823                         // Encode the image
 824                         if ( !terminated && video_st )
 825                                 mlt_deque_push_back( queue, frame );
 826                         else
 827                                 mlt_frame_close( frame );
 828                 }
 829
 830                 // While we have stuff to process, process...
 831                 while ( 1 )
 832                 {
 833                         if (audio_st)
 834                                 audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 835                         else
 836                                 audio_pts = 0.0;
 837
 838                         if (video_st)
 839                                 video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
 840                         else
 841                                 video_pts = 0.0;
 842
 843                         // Write interleaved audio and video frames
 844                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 845                         {
 846                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 847                                 {
 848                                         AVCodecContext *c;
 849                                         AVPacket pkt;
 850                                         av_init_packet( &pkt );
 851
 852                                         c = &audio_st->codec;
 853
 854                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 855
 856                                         pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 857                                         // Write the compressed frame in the media file
 858                                         if ( c->coded_frame )
 859                                                 pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
 860                                         pkt.flags |= PKT_FLAG_KEY;
 861                                         pkt.stream_index= audio_st->index;
 862                                         pkt.data= audio_outbuf;
 863
 864                                         if ( av_interleaved_write_frame( oc, &pkt ) != 0)
 865                                                 fprintf(stderr, "Error while writing audio frame\n");
 866
 867                                         audio_pts += c->frame_size;
 868                                 }
 869                                 else
 870                                 {
 871                                         break;
 872                                 }
 873                         }
 874                         else if ( video_st )
 875                         {
 876                                 if ( mlt_deque_count( queue ) )
 877                                 {
 878                                         int out_size, ret;
 879                                         AVCodecContext *c;
 880
 881                                         frame = mlt_deque_pop_front( queue );
 882                                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 883
 884                                         c = &video_st->codec;
 885
 886                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 887                                         {
 888                                                 int i = 0;
 889                                                 int j = 0;
 890                                                 uint8_t *p;
 891                                                 uint8_t *q;
 892
 893                                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 894
 895                                                 // This will cause some fx to go awry....
 896                                                 if ( mlt_properties_get_int( properties, "transcode" ) )
 897                                                 {
 898                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_width", img_height * 4.0 / 3.0 );
 899                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_height", img_height );
 900                                                 }
 901
 902                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 903
 904                                                 q = image;
 905
 906                                                 for ( i = 0; i < height; i ++ )
 907                                                 {
 908                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 909                                                         j = width;
 910                                                         while( j -- )
 911                                                         {
 912                                                                 *p ++ = *q ++;
 913                                                                 *p ++ = *q ++;
 914                                                         }
 915                                                 }
 916
 917                                                 img_convert( ( AVPicture * )output, video_st->codec.pix_fmt, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 918                                         }
 919
 920                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 921                                         {
 922                                                 // raw video case. The API will change slightly in the near future for that
 923                                                 AVPacket pkt;
 924                                                 av_init_packet(&pkt);
 925
 926                                                 pkt.flags |= PKT_FLAG_KEY;
 927                                                 pkt.stream_index= video_st->index;
 928                                                 pkt.data= (uint8_t *)output;
 929                                                 pkt.size= sizeof(AVPicture);
 930
 931                                                 ret = av_write_frame(oc, &pkt);
 932                                                 video_pts += c->frame_size;
 933                                         }
 934                                         else
 935                                         {
 936                                                 // Set the quality
 937                                                 output->quality = video_st->quality;
 938
 939                                                 // Encode the image
 940                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 941
 942                                                 // If zero size, it means the image was buffered
 943                                                 if (out_size != 0)
 944                                                 {
 945                                                         AVPacket pkt;
 946                                                         av_init_packet( &pkt );
 947
 948                                                         if ( c->coded_frame )
 949                                                                 pkt.pts= av_rescale_q( c->coded_frame->pts, c->time_base, video_st->time_base );
 950                                                         if(c->coded_frame->key_frame)
 951                                                                 pkt.flags |= PKT_FLAG_KEY;
 952                                                         pkt.stream_index= video_st->index;
 953                                                         pkt.data= video_outbuf;
 954                                                         pkt.size= out_size;
 955
 956                                         // write the compressed frame in the media file
 957                                                         ret = av_interleaved_write_frame(oc, &pkt);
 958                                                         video_pts += c->frame_size;
 959                                                 }
 960                                         }
 961                                         frame_count++;
 962                                         mlt_frame_close( frame );
 963                                 }
 964                                 else
 965                                 {
 966                                         break;
 967                                 }
 968                         }
 969                 }
 970
 971                 if ( real_time_output && frames % 12 == 0 )
 972                 {
 973                         long passed = time_difference( &ante );
 974                         if ( fifo != NULL )
 975                         {
 976                                 long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
 977                                 passed -= pending;
 978                         }
 979                         if ( passed < total_time )
 980                         {
 981                                 long total = ( total_time - passed );
 982                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
 983                                 nanosleep( &t, NULL );
 984                         }
 985                 }
 986         }
 987
 988         // close each codec
 989         if (video_st)
 990                 close_video(oc, video_st);
 991         if (audio_st)
 992                 close_audio(oc, audio_st);
 993
 994         // Write the trailer, if any
 995         av_write_trailer(oc);
 996
 997         // Free the streams
 998         for(i = 0; i < oc->nb_streams; i++)
 999                 av_freep(&oc->streams[i]);
1000
1001         // Close the output file
1002         if (!(fmt->flags & AVFMT_NOFILE))
1003                 url_fclose(&oc->pb);
1004
1005         // Clean up input and output frames
1006         if ( output )
1007                 av_free( output->data[0] );
1008         av_free( output );
1009         av_free( input->data[0] );
1010         av_free( input );
1011         av_free( video_outbuf );
1012         av_free( buffer );
1013
1014         // Free the stream
1015         av_free(oc);
1016
1017         // Just in case we terminated on pause
1018         mlt_properties_set_int( properties, "running", 0 );
1019
1020         mlt_consumer_stopped( this );
1021
1022         return NULL;
1023 }
1024
1025 /** Close the consumer.
1026 */
1027
1028 static void consumer_close( mlt_consumer this )
1029 {
1030         // Stop the consumer
1031         mlt_consumer_stop( this );
1032
1033         // Close the parent
1034         mlt_consumer_close( this );
1035
1036         // Free the memory
1037         free( this );
1038 }