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 <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_double( properties, "fps" );
 421                 c->time_base.num = mlt_properties_get_double( properties, "frame_rate_base" );
 422                 c->time_base.num = 1;
 423                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 424                 c->pix_fmt = PIX_FMT_YUV420P;
 425
 426                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 427                 {
 428                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 429                         c->b_frame_strategy = 0;
 430                         c->b_quant_factor = 2.0;
 431                 }
 432
 433                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 434                 c->sample_aspect_ratio = av_d2q( mlt_properties_get_double( properties, "aspect_ratio" ), 255 );
 435                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 436                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 437                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 438                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 439                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 440                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 441                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 442                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 443                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 444                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 445                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 446                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 447                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 448                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 449                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 450                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 451                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 452                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 453                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 454                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 455                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 456
 457                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 458                 {
 459                         c->flags |= CODEC_FLAG_QSCALE;
 460                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 461                 }
 462
 463                 // Some formats want stream headers to be seperate (hmm)
 464                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 465                         !strcmp( oc->oformat->name, "mov" ) ||
 466                         !strcmp( oc->oformat->name, "3gp" ) )
 467                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 468
 469                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 470                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 471                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 472                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 473                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 474                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 475                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 476                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 477                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 478                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 479                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 480                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 481                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 482                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 483                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 484                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 485                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 486                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 487                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 488                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 489                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 490                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 491                 c->context_model= mlt_properties_get_int( properties, "context" );
 492                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 493                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 494         }
 495         else
 496         {
 497                 fprintf( stderr, "Could not allocate a stream for video\n" );
 498         }
 499
 500         return st;
 501 }
 502
 503 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 504 {
 505         // Allocate a frame
 506         AVFrame *picture = avcodec_alloc_frame();
 507
 508         // Determine size of the
 509         int size = avpicture_get_size(pix_fmt, width, height);
 510
 511         // Allocate the picture buf
 512         uint8_t *picture_buf = av_malloc(size);
 513
 514         // If we have both, then fill the image
 515         if ( picture != NULL && picture_buf != NULL )
 516         {
 517                 // Fill the frame with the allocated buffer
 518                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 519         }
 520         else
 521         {
 522                 // Something failed - clean up what we can
 523                 av_free( picture );
 524                 av_free( picture_buf );
 525                 picture = NULL;
 526         }
 527
 528         return picture;
 529 }
 530
 531 static int open_video(AVFormatContext *oc, AVStream *st)
 532 {
 533         // Get the codec
 534         AVCodecContext *video_enc = &st->codec;
 535
 536         // find the video encoder
 537         AVCodec *codec = avcodec_find_encoder( video_enc->codec_id );
 538
 539         if( codec && codec->supported_framerates )
 540         {
 541                 const AVRational *p = codec->supported_framerates;
 542                 AVRational req = ( AVRational ){ video_enc->time_base.den, video_enc->time_base.num };
 543                 const AVRational *best = NULL;
 544                 AVRational best_error = (AVRational){ INT_MAX, 1 };
 545                 for( ; p->den!=0; p++ )
 546                 {
 547                         AVRational error= av_sub_q( req, *p );
 548                         if( error.num < 0 )
 549                                 error.num *= -1;
 550                         if( av_cmp_q( error, best_error ) < 0 )
 551                         {
 552                                 best_error = error;
 553                                 best = p;
 554                         }
 555                 }
 556                 video_enc->time_base.den = best->num;
 557                 video_enc->time_base.num = best->den;
 558         }
 559
 560         if( codec && codec->pix_fmts )
 561         {
 562                 const enum PixelFormat *p = codec->pix_fmts;
 563                 for( ; *p!=-1; p++ )
 564                 {
 565                         if( *p == video_enc->pix_fmt )
 566                                 break;
 567                 }
 568                 if( *p == -1 )
 569                         video_enc->pix_fmt = codec->pix_fmts[ 0 ];
 570         }
 571
 572         // Open the codec safely
 573         return codec != NULL && avcodec_open( video_enc, codec ) >= 0;
 574 }
 575
 576 void close_video(AVFormatContext *oc, AVStream *st)
 577 {
 578         avcodec_close(&st->codec);
 579 }
 580
 581 static inline long time_difference( struct timeval *time1 )
 582 {
 583         struct timeval time2;
 584         gettimeofday( &time2, NULL );
 585         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 586 }
 587
 588 /** The main thread - the argument is simply the consumer.
 589 */
 590
 591 static void *consumer_thread( void *arg )
 592 {
 593         // Map the argument to the object
 594         mlt_consumer this = arg;
 595
 596         // Get the properties
 597         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 598
 599         // Get the terminate on pause property
 600         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 601         int terminated = 0;
 602
 603         // Determine if feed is slow (for realtime stuff)
 604         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 605
 606         // Time structures
 607         struct timeval ante;
 608
 609         // Get the frame rate
 610         int fps = mlt_properties_get_double( properties, "fps" );
 611
 612         // Get width and height
 613         int width = mlt_properties_get_int( properties, "width" );
 614         int height = mlt_properties_get_int( properties, "height" );
 615         int img_width = width;
 616         int img_height = height;
 617
 618         // Get default audio properties
 619         mlt_audio_format aud_fmt = mlt_audio_pcm;
 620         int channels = mlt_properties_get_int( properties, "channels" );
 621         int frequency = mlt_properties_get_int( properties, "frequency" );
 622         int16_t *pcm = NULL;
 623         int samples = 0;
 624
 625         // AVFormat audio buffer and frame size
 626         int audio_outbuf_size = 10000;
 627         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 628         int audio_input_frame_size = 0;
 629
 630         // AVFormat video buffer and frame count
 631         int frame_count = 0;
 632         int video_outbuf_size = ( 1024 * 1024 );
 633         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 634
 635         // Used for the frame properties
 636         mlt_frame frame = NULL;
 637         mlt_properties frame_properties = NULL;
 638
 639         // Get the queues
 640         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 641         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 642
 643         // Need two av pictures for converting
 644         AVFrame *output = NULL;
 645         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 646
 647         // For receiving images from an mlt_frame
 648         uint8_t *image;
 649         mlt_image_format img_fmt = mlt_image_yuv422;
 650
 651         // For receiving audio samples back from the fifo
 652         int16_t *buffer = av_malloc( 48000 * 2 );
 653         int count = 0;
 654
 655         // Allocate the context
 656         AVFormatContext *oc = av_alloc_format_context( );
 657
 658         // Streams
 659         AVStream *audio_st = NULL;
 660         AVStream *video_st = NULL;
 661
 662         // Time stamps
 663         double audio_pts = 0;
 664         double video_pts = 0;
 665
 666         // Loop variable
 667         int i;
 668
 669         // Frames despatched
 670         long int frames = 0;
 671         long int total_time = 0;
 672
 673         // Determine the format
 674         AVOutputFormat *fmt = NULL;
 675         char *filename = mlt_properties_get( properties, "target" );
 676         char *format = mlt_properties_get( properties, "format" );
 677         char *vcodec = mlt_properties_get( properties, "vcodec" );
 678         char *acodec = mlt_properties_get( properties, "acodec" );
 679
 680         // Used to store and override codec ids
 681         int audio_codec_id;
 682         int video_codec_id;
 683
 684         // Check for user selected format first
 685         if ( format != NULL )
 686                 fmt = guess_format( format, NULL, NULL );
 687
 688         // Otherwise check on the filename
 689         if ( fmt == NULL && filename != NULL )
 690                 fmt = guess_format( NULL, filename, NULL );
 691
 692         // Otherwise default to mpeg
 693         if ( fmt == NULL )
 694                 fmt = guess_format( "mpeg", NULL, NULL );
 695
 696         // We need a filename - default to stdout?
 697         if ( filename == NULL || !strcmp( filename, "" ) )
 698                 filename = "pipe:";
 699
 700         // Get the codec ids selected
 701         audio_codec_id = fmt->audio_codec;
 702         video_codec_id = fmt->video_codec;
 703
 704         // Check for audio codec overides
 705         if ( acodec != NULL )
 706         {
 707                 AVCodec *p = first_avcodec;
 708                 while( p != NULL )
 709                 {
 710                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 711                                 break;
 712                         p = p->next;
 713                 }
 714                 if ( p != NULL )
 715                         audio_codec_id = p->id;
 716                 else
 717                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 718         }
 719
 720         // Check for video codec overides
 721         if ( vcodec != NULL )
 722         {
 723                 AVCodec *p = first_avcodec;
 724                 while( p != NULL )
 725                 {
 726                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 727                                 break;
 728                         p = p->next;
 729                 }
 730                 if ( p != NULL )
 731                         video_codec_id = p->id;
 732                 else
 733                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 734         }
 735
 736         // Update the output context
 737         oc->oformat = fmt;
 738         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 739
 740         // Add audio and video streams
 741         if ( fmt->video_codec != CODEC_ID_NONE )
 742                 video_st = add_video_stream( this, oc, video_codec_id );
 743         if ( fmt->audio_codec != CODEC_ID_NONE )
 744                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 745
 746         // Set the parameters (even though we have none...)
 747         if ( av_set_parameters(oc, NULL) >= 0 )
 748         {
 749                 if ( video_st && !open_video( oc, video_st ) )
 750                         video_st = NULL;
 751                 if ( audio_st )
 752                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 753
 754                 // Open the output file, if needed
 755                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 756                 {
 757                         if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 758                         {
 759                                 fprintf(stderr, "Could not open '%s'\n", filename);
 760                                 mlt_properties_set_int( properties, "running", 0 );
 761                         }
 762                 }
 763
 764                 // Write the stream header, if any
 765                 if ( mlt_properties_get_int( properties, "running" ) )
 766                         av_write_header( oc );
 767         }
 768         else
 769         {
 770                 fprintf(stderr, "Invalid output format parameters\n");
 771                 mlt_properties_set_int( properties, "running", 0 );
 772         }
 773
 774         // Allocate picture
 775         if ( video_st )
 776                 output = alloc_picture( video_st->codec.pix_fmt, width, height );
 777
 778         // Last check - need at least one stream
 779         if ( audio_st == NULL && video_st == NULL )
 780                 mlt_properties_set_int( properties, "running", 0 );
 781
 782         // Get the starting time (can ignore the times above)
 783         gettimeofday( &ante, NULL );
 784
 785         // Loop while running
 786         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 787         {
 788                 // Get the frame
 789                 frame = mlt_consumer_rt_frame( this );
 790
 791                 // Check that we have a frame to work with
 792                 if ( frame != NULL )
 793                 {
 794                         // Increment frames despatched
 795                         frames ++;
 796
 797                         // Default audio args
 798                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 799
 800                         // Check for the terminated condition
 801                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 802
 803                         // Get audio and append to the fifo
 804                         if ( !terminated && audio_st )
 805                         {
 806                                 samples = mlt_sample_calculator( fps, frequency, count );
 807                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 808
 809                                 // Create the fifo if we don't have one
 810                                 if ( fifo == NULL )
 811                                 {
 812                                         fifo = sample_fifo_init( frequency, channels );
 813                                         mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
 814                                 }
 815
 816                                 if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
 817                                         memset( pcm, 0, samples * channels * 2 );
 818
 819                                 // Append the samples
 820                                 sample_fifo_append( fifo, pcm, samples * channels );
 821                                 total_time += ( samples * 1000000 ) / frequency;
 822                         }
 823
 824                         // Encode the image
 825                         if ( !terminated && video_st )
 826                                 mlt_deque_push_back( queue, frame );
 827                         else
 828                                 mlt_frame_close( frame );
 829                 }
 830
 831                 // While we have stuff to process, process...
 832                 while ( 1 )
 833                 {
 834                         if (audio_st)
 835                                 audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 836                         else
 837                                 audio_pts = 0.0;
 838
 839                         if (video_st)
 840                                 video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
 841                         else
 842                                 video_pts = 0.0;
 843
 844                         // Write interleaved audio and video frames
 845                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 846                         {
 847                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 848                                 {
 849                                         AVCodecContext *c;
 850                                         AVPacket pkt;
 851                                         av_init_packet( &pkt );
 852
 853                                         c = &audio_st->codec;
 854
 855                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 856
 857                                         pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 858                                         // Write the compressed frame in the media file
 859                                         if ( c->coded_frame )
 860                                                 pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
 861                                         pkt.flags |= PKT_FLAG_KEY;
 862                                         pkt.stream_index= audio_st->index;
 863                                         pkt.data= audio_outbuf;
 864
 865                                         if ( av_interleaved_write_frame( oc, &pkt ) != 0)
 866                                                 fprintf(stderr, "Error while writing audio frame\n");
 867
 868                                         audio_pts += c->frame_size;
 869                                 }
 870                                 else
 871                                 {
 872                                         break;
 873                                 }
 874                         }
 875                         else if ( video_st )
 876                         {
 877                                 if ( mlt_deque_count( queue ) )
 878                                 {
 879                                         int out_size, ret;
 880                                         AVCodecContext *c;
 881
 882                                         frame = mlt_deque_pop_front( queue );
 883                                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 884
 885                                         c = &video_st->codec;
 886
 887                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 888                                         {
 889                                                 int i = 0;
 890                                                 int j = 0;
 891                                                 uint8_t *p;
 892                                                 uint8_t *q;
 893
 894                                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 895
 896                                                 // This will cause some fx to go awry....
 897                                                 if ( mlt_properties_get_int( properties, "transcode" ) )
 898                                                 {
 899                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_width", img_height * 4.0 / 3.0 );
 900                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_height", img_height );
 901                                                 }
 902
 903                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 904
 905                                                 q = image;
 906
 907                                                 for ( i = 0; i < height; i ++ )
 908                                                 {
 909                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 910                                                         j = width;
 911                                                         while( j -- )
 912                                                         {
 913                                                                 *p ++ = *q ++;
 914                                                                 *p ++ = *q ++;
 915                                                         }
 916                                                 }
 917
 918                                                 img_convert( ( AVPicture * )output, video_st->codec.pix_fmt, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 919                                         }
 920
 921                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 922                                         {
 923                                                 // raw video case. The API will change slightly in the near future for that
 924                                                 AVPacket pkt;
 925                                                 av_init_packet(&pkt);
 926
 927                                                 pkt.flags |= PKT_FLAG_KEY;
 928                                                 pkt.stream_index= video_st->index;
 929                                                 pkt.data= (uint8_t *)output;
 930                                                 pkt.size= sizeof(AVPicture);
 931
 932                                                 ret = av_write_frame(oc, &pkt);
 933                                                 video_pts += c->frame_size;
 934                                         }
 935                                         else
 936                                         {
 937                                                 // Set the quality
 938                                                 output->quality = video_st->quality;
 939
 940                                                 // Encode the image
 941                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 942
 943                                                 // If zero size, it means the image was buffered
 944                                                 if (out_size != 0)
 945                                                 {
 946                                                         AVPacket pkt;
 947                                                         av_init_packet( &pkt );
 948
 949                                                         if ( c->coded_frame )
 950                                                                 pkt.pts= av_rescale_q( c->coded_frame->pts, c->time_base, video_st->time_base );
 951                                                         if(c->coded_frame->key_frame)
 952                                                                 pkt.flags |= PKT_FLAG_KEY;
 953                                                         pkt.stream_index= video_st->index;
 954                                                         pkt.data= video_outbuf;
 955                                                         pkt.size= out_size;
 956
 957                                         // write the compressed frame in the media file
 958                                                         ret = av_interleaved_write_frame(oc, &pkt);
 959                                                         video_pts += c->frame_size;
 960                                                 }
 961                                         }
 962                                         frame_count++;
 963                                         mlt_frame_close( frame );
 964                                 }
 965                                 else
 966                                 {
 967                                         break;
 968                                 }
 969                         }
 970                 }
 971
 972                 if ( real_time_output && frames % 12 == 0 )
 973                 {
 974                         long passed = time_difference( &ante );
 975                         if ( fifo != NULL )
 976                         {
 977                                 long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
 978                                 passed -= pending;
 979                         }
 980                         if ( passed < total_time )
 981                         {
 982                                 long total = ( total_time - passed );
 983                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
 984                                 nanosleep( &t, NULL );
 985                         }
 986                 }
 987         }
 988
 989         // close each codec
 990         if (video_st)
 991                 close_video(oc, video_st);
 992         if (audio_st)
 993                 close_audio(oc, audio_st);
 994
 995         // Write the trailer, if any
 996         av_write_trailer(oc);
 997
 998         // Free the streams
 999         for(i = 0; i < oc->nb_streams; i++)
1000                 av_freep(&oc->streams[i]);
1001
1002         // Close the output file
1003         if (!(fmt->flags & AVFMT_NOFILE))
1004                 url_fclose(&oc->pb);
1005
1006         // Clean up input and output frames
1007         if ( output )
1008                 av_free( output->data[0] );
1009         av_free( output );
1010         av_free( input->data[0] );
1011         av_free( input );
1012         av_free( video_outbuf );
1013         av_free( buffer );
1014
1015         // Free the stream
1016         av_free(oc);
1017
1018         // Just in case we terminated on pause
1019         mlt_properties_set_int( properties, "running", 0 );
1020
1021         mlt_consumer_stopped( this );
1022
1023         return NULL;
1024 }
1025
1026 /** Close the consumer.
1027 */
1028
1029 static void consumer_close( mlt_consumer this )
1030 {
1031         // Stop the consumer
1032         mlt_consumer_stop( this );
1033
1034         // Close the parent
1035         mlt_consumer_close( this );
1036
1037         // Free the memory
1038         free( this );
1039 }