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 library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library 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 GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, 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 #ifdef SWSCALE
  39 #include <swscale.h>
  40 #endif
  41
  42 //
  43 // This structure should be extended and made globally available in mlt
  44 //
  45
  46 typedef struct
  47 {
  48         int16_t *buffer;
  49         int size;
  50         int used;
  51         double time;
  52         int frequency;
  53         int channels;
  54 }
  55 *sample_fifo, sample_fifo_s;
  56
  57 sample_fifo sample_fifo_init( int frequency, int channels )
  58 {
  59         sample_fifo this = calloc( 1, sizeof( sample_fifo_s ) );
  60         this->frequency = frequency;
  61         this->channels = channels;
  62         return this;
  63 }
  64
  65 // sample_fifo_clear and check are temporarily aborted (not working as intended)
  66
  67 void sample_fifo_clear( sample_fifo this, double time )
  68 {
  69         int words = ( float )( time - this->time ) * this->frequency * this->channels;
  70         if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) && this->used > words && words > 0 )
  71         {
  72                 memmove( this->buffer, &this->buffer[ words ], ( this->used - words ) * sizeof( int16_t ) );
  73                 this->used -= words;
  74                 this->time = time;
  75         }
  76         else if ( ( int )( ( float )time * 100 ) != ( int )( ( float )this->time * 100 ) )
  77         {
  78                 this->used = 0;
  79                 this->time = time;
  80         }
  81 }
  82
  83 void sample_fifo_check( sample_fifo this, double time )
  84 {
  85         if ( this->used == 0 )
  86         {
  87                 if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) )
  88                         this->time = time;
  89         }
  90 }
  91
  92 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  93 {
  94         if ( ( this->size - this->used ) < count )
  95         {
  96                 this->size += count * 5;
  97                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  98         }
  99
 100         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
 101         this->used += count;
 102 }
 103
 104 int sample_fifo_used( sample_fifo this )
 105 {
 106         return this->used;
 107 }
 108
 109 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
 110 {
 111         if ( count > this->used )
 112                 count = this->used;
 113
 114         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
 115         this->used -= count;
 116         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
 117
 118         this->time += ( double )count / this->channels / this->frequency;
 119
 120         return count;
 121 }
 122
 123 void sample_fifo_close( sample_fifo this )
 124 {
 125         free( this->buffer );
 126         free( this );
 127 }
 128
 129 // Forward references.
 130 static int consumer_start( mlt_consumer this );
 131 static int consumer_stop( mlt_consumer this );
 132 static int consumer_is_stopped( mlt_consumer this );
 133 static void *consumer_thread( void *arg );
 134 static void consumer_close( mlt_consumer this );
 135
 136 /** Initialise the dv consumer.
 137 */
 138
 139 mlt_consumer consumer_avformat_init( char *arg )
 140 {
 141         // Allocate the consumer
 142         mlt_consumer this = mlt_consumer_new( );
 143
 144         // If memory allocated and initialises without error
 145         if ( this != NULL )
 146         {
 147                 // Get properties from the consumer
 148                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 149
 150                 // Assign close callback
 151                 this->close = consumer_close;
 152
 153                 // Interpret the argument
 154                 if ( arg != NULL )
 155                         mlt_properties_set( properties, "target", arg );
 156
 157                 // sample and frame queue
 158                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 159
 160                 // Set avformat defaults (all lifted from ffmpeg.c)
 161                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 162                 mlt_properties_set_int( properties, "video_bit_rate", 200 * 1000 );
 163                 mlt_properties_set_int( properties, "video_bit_rate_tolerance", 4000 * 1000 );
 164                 mlt_properties_set_int( properties, "gop_size", 12 );
 165                 mlt_properties_set_int( properties, "b_frames", 0 );
 166                 mlt_properties_set_int( properties, "mb_decision", FF_MB_DECISION_SIMPLE );
 167                 mlt_properties_set_double( properties, "qscale", 1 );
 168                 mlt_properties_set_int( properties, "me_method", ME_EPZS );
 169                 mlt_properties_set_int( properties, "mb_cmp", FF_CMP_SAD );
 170                 mlt_properties_set_int( properties, "ildct_cmp", FF_CMP_VSAD );
 171                 mlt_properties_set_int( properties, "sub_cmp", FF_CMP_SAD );
 172                 mlt_properties_set_int( properties, "cmp", FF_CMP_SAD );
 173                 mlt_properties_set_int( properties, "pre_cmp", FF_CMP_SAD );
 174                 mlt_properties_set_int( properties, "pre_me", 0 );
 175                 mlt_properties_set_double( properties, "lumi_mask", 0 );
 176                 mlt_properties_set_double( properties, "dark_mask", 0 );
 177                 mlt_properties_set_double( properties, "scplx_mask", 0 );
 178                 mlt_properties_set_double( properties, "tcplx_mask", 0 );
 179                 mlt_properties_set_double( properties, "p_mask", 0 );
 180                 mlt_properties_set_int( properties, "qns", 0 );
 181                 mlt_properties_set_int( properties, "video_qmin", 2 );
 182                 mlt_properties_set_int( properties, "video_qmax", 31 );
 183                 mlt_properties_set_int( properties, "video_lmin", 2*FF_QP2LAMBDA );
 184                 mlt_properties_set_int( properties, "video_lmax", 31*FF_QP2LAMBDA );
 185                 mlt_properties_set_int( properties, "video_mb_qmin", 2 );
 186                 mlt_properties_set_int( properties, "video_mb_qmax", 31 );
 187                 mlt_properties_set_int( properties, "video_qdiff", 3 );
 188                 mlt_properties_set_double( properties, "video_qblur", 0.5 );
 189                 mlt_properties_set_double( properties, "video_qcomp", 0.5 );
 190                 mlt_properties_set_int( properties, "video_rc_max_rate", 0 );
 191                 mlt_properties_set_int( properties, "video_rc_min_rate", 0 );
 192                 mlt_properties_set_int( properties, "video_rc_buffer_size", 0 );
 193                 mlt_properties_set_double( properties, "video_rc_buffer_aggressivity", 1.0 );
 194                 mlt_properties_set_double( properties, "video_rc_initial_cplx", 0 );
 195                 mlt_properties_set_double( properties, "video_i_qfactor", 1.25 );
 196                 mlt_properties_set_double( properties, "video_b_qfactor", 1.25 );
 197                 mlt_properties_set_double( properties, "video_i_qoffset", -0.8 );
 198                 mlt_properties_set_double( properties, "video_b_qoffset", 0 );
 199                 mlt_properties_set_int( properties, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS );
 200                 mlt_properties_set_int( properties, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS );
 201                 mlt_properties_set_int( properties, "dct_algo", 0 );
 202                 mlt_properties_set_int( properties, "idct_algo", 0 );
 203                 mlt_properties_set_int( properties, "me_threshold", 0 );
 204                 mlt_properties_set_int( properties, "mb_threshold", 0 );
 205                 mlt_properties_set_int( properties, "intra_dc_precision", 0 );
 206                 mlt_properties_set_int( properties, "strict", 0 );
 207                 mlt_properties_set_int( properties, "error_rate", 0 );
 208                 mlt_properties_set_int( properties, "noise_reduction", 0 );
 209                 mlt_properties_set_int( properties, "sc_threshold", 0 );
 210                 mlt_properties_set_int( properties, "me_range", 0 );
 211                 mlt_properties_set_int( properties, "coder", 0 );
 212                 mlt_properties_set_int( properties, "context", 0 );
 213                 mlt_properties_set_int( properties, "predictor", 0 );
 214
 215                 // Ensure termination at end of the stream
 216                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 217
 218                 // Set up start/stop/terminated callbacks
 219                 this->start = consumer_start;
 220                 this->stop = consumer_stop;
 221                 this->is_stopped = consumer_is_stopped;
 222         }
 223
 224         // Return this
 225         return this;
 226 }
 227
 228 /** Start the consumer.
 229 */
 230
 231 static int consumer_start( mlt_consumer this )
 232 {
 233         // Get the properties
 234         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 235
 236         // Check that we're not already running
 237         if ( !mlt_properties_get_int( properties, "running" ) )
 238         {
 239                 // Allocate a thread
 240                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 241
 242                 // Get the width and height
 243                 int width = mlt_properties_get_int( properties, "width" );
 244                 int height = mlt_properties_get_int( properties, "height" );
 245
 246                 // Obtain the size property
 247                 char *size = mlt_properties_get( properties, "size" );
 248
 249                 // Interpret it
 250                 if ( size != NULL )
 251                 {
 252                         int tw, th;
 253                         if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
 254                         {
 255                                 width = tw;
 256                                 height = th;
 257                         }
 258                         else
 259                         {
 260                                 fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
 261                         }
 262                 }
 263
 264                 // Now ensure we honour the multiple of two requested by libavformat
 265                 mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
 266                 mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
 267
 268                 // Assign the thread to properties
 269                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 270
 271                 // Set the running state
 272                 mlt_properties_set_int( properties, "running", 1 );
 273
 274                 // Create the thread
 275                 pthread_create( thread, NULL, consumer_thread, this );
 276         }
 277         return 0;
 278 }
 279
 280 /** Stop the consumer.
 281 */
 282
 283 static int consumer_stop( mlt_consumer this )
 284 {
 285         // Get the properties
 286         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 287
 288         // Check that we're running
 289         if ( mlt_properties_get_int( properties, "running" ) )
 290         {
 291                 // Get the thread
 292                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 293
 294                 // Stop the thread
 295                 mlt_properties_set_int( properties, "running", 0 );
 296
 297                 // Wait for termination
 298                 pthread_join( *thread, NULL );
 299         }
 300
 301         return 0;
 302 }
 303
 304 /** Determine if the consumer is stopped.
 305 */
 306
 307 static int consumer_is_stopped( mlt_consumer this )
 308 {
 309         // Get the properties
 310         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 311         return !mlt_properties_get_int( properties, "running" );
 312 }
 313
 314 /** Add an audio output stream
 315 */
 316
 317 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 318 {
 319         // Get the properties
 320         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 321
 322         // Create a new stream
 323         AVStream *st = av_new_stream( oc, 1 );
 324
 325         // If created, then initialise from properties
 326         if ( st != NULL )
 327         {
 328                 AVCodecContext *c = st->codec;
 329                 c->codec_id = codec_id;
 330                 c->codec_type = CODEC_TYPE_AUDIO;
 331
 332                 // Put sample parameters
 333                 c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 334                 c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 335                 c->channels = mlt_properties_get_int( properties, "channels" );
 336
 337         if (oc->oformat->flags & AVFMT_GLOBALHEADER)
 338                 c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 339
 340                 // Allow the user to override the audio fourcc
 341                 if ( mlt_properties_get( properties, "afourcc" ) )
 342                 {
 343                         char *tail = NULL;
 344                         char *arg = mlt_properties_get( properties, "afourcc" );
 345                 int tag = strtol( arg, &tail, 0);
 346                 if( !tail || *tail )
 347                         tag = arg[ 0 ] + ( arg[ 1 ] << 8 ) + ( arg[ 2 ] << 16 ) + ( arg[ 3 ] << 24 );
 348                         c->codec_tag = tag;
 349                 }
 350         }
 351         else
 352         {
 353                 fprintf( stderr, "Could not allocate a stream for audio\n" );
 354         }
 355
 356         return st;
 357 }
 358
 359 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 360 {
 361         // We will return the audio input size from here
 362         int audio_input_frame_size = 0;
 363
 364         // Get the context
 365         AVCodecContext *c = st->codec;
 366
 367         // Find the encoder
 368         AVCodec *codec = avcodec_find_encoder( c->codec_id );
 369
 370         // Continue if codec found and we can open it
 371         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 372         {
 373                 // ugly hack for PCM codecs (will be removed ASAP with new PCM
 374                 // support to compute the input frame size in samples
 375                 if ( c->frame_size <= 1 )
 376                 {
 377                         audio_input_frame_size = audio_outbuf_size / c->channels;
 378                         switch(st->codec->codec_id)
 379                         {
 380                                 case CODEC_ID_PCM_S16LE:
 381                                 case CODEC_ID_PCM_S16BE:
 382                                 case CODEC_ID_PCM_U16LE:
 383                                 case CODEC_ID_PCM_U16BE:
 384                                         audio_input_frame_size >>= 1;
 385                                         break;
 386                                 default:
 387                                         break;
 388                         }
 389                 }
 390                 else
 391                 {
 392                         audio_input_frame_size = c->frame_size;
 393                 }
 394
 395                 // Some formats want stream headers to be seperate (hmm)
 396                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 397                         !strcmp( oc->oformat->name, "mov" ) ||
 398                         !strcmp( oc->oformat->name, "3gp" ) )
 399                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 400         }
 401         else
 402         {
 403                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 404         }
 405
 406         return audio_input_frame_size;
 407 }
 408
 409 static void close_audio( AVFormatContext *oc, AVStream *st )
 410 {
 411         avcodec_close( st->codec );
 412 }
 413
 414 /** Add a video output stream
 415 */
 416
 417 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 418 {
 419         // Get the properties
 420         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 421
 422         // Create a new stream
 423         AVStream *st = av_new_stream( oc, 0 );
 424
 425         if ( st != NULL )
 426         {
 427                 char *pix_fmt = mlt_properties_get( properties, "pix_fmt" );
 428                 double ar = mlt_properties_get_double( properties, "display_ratio" );
 429                 AVCodecContext *c = st->codec;
 430                 c->codec_id = codec_id;
 431                 c->codec_type = CODEC_TYPE_VIDEO;
 432
 433                 // put sample parameters
 434                 c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 435                 c->bit_rate_tolerance = mlt_properties_get_int( properties, "video_bit_rate_tolerance" );
 436                 c->width = mlt_properties_get_int( properties, "width" );
 437                 c->height = mlt_properties_get_int( properties, "height" );
 438                 c->time_base.num = mlt_properties_get_int( properties, "frame_rate_den" );
 439                 c->time_base.den = mlt_properties_get_int( properties, "frame_rate_num" );
 440                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 441                 c->pix_fmt = pix_fmt ? avcodec_get_pix_fmt( pix_fmt ) : PIX_FMT_YUV420P;
 442
 443                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 444                 {
 445                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 446                         c->b_frame_strategy = 0;
 447                         c->b_quant_factor = 2.0;
 448                 }
 449
 450                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 451                 c->sample_aspect_ratio = av_d2q( ar * c->height / c->width , 255);
 452                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 453                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 454                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 455                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 456                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 457                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 458                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 459                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 460                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 461                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 462                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 463                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 464                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 465                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 466                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 467                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 468                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 469                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 470                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 471                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 472                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 473
 474                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 475                 {
 476                         c->flags |= CODEC_FLAG_QSCALE;
 477                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 478                 }
 479
 480                 // Allow the user to override the video fourcc
 481                 if ( mlt_properties_get( properties, "vfourcc" ) )
 482                 {
 483                         char *tail = NULL;
 484                         const char *arg = mlt_properties_get( properties, "vfourcc" );
 485                 int tag = strtol( arg, &tail, 0);
 486                 if( !tail || *tail )
 487                         tag = arg[ 0 ] + ( arg[ 1 ] << 8 ) + ( arg[ 2 ] << 16 ) + ( arg[ 3 ] << 24 );
 488                         c->codec_tag = tag;
 489                 }
 490
 491                 // Some formats want stream headers to be seperate
 492                 if ( oc->oformat->flags & AVFMT_GLOBALHEADER )
 493                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 494
 495                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 496                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 497                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 498                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 499                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 500                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 501                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 502                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 503                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 504                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 505                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 506                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 507                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 508                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 509                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 510                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 511                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 512                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 513                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 514                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 515                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 516                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 517                 c->context_model= mlt_properties_get_int( properties, "context" );
 518                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 519                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 520         }
 521         else
 522         {
 523                 fprintf( stderr, "Could not allocate a stream for video\n" );
 524         }
 525
 526         return st;
 527 }
 528
 529 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 530 {
 531         // Allocate a frame
 532         AVFrame *picture = avcodec_alloc_frame();
 533
 534         // Determine size of the
 535         int size = avpicture_get_size(pix_fmt, width, height);
 536
 537         // Allocate the picture buf
 538         uint8_t *picture_buf = av_malloc(size);
 539
 540         // If we have both, then fill the image
 541         if ( picture != NULL && picture_buf != NULL )
 542         {
 543                 // Fill the frame with the allocated buffer
 544                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 545         }
 546         else
 547         {
 548                 // Something failed - clean up what we can
 549                 av_free( picture );
 550                 av_free( picture_buf );
 551                 picture = NULL;
 552         }
 553
 554         return picture;
 555 }
 556
 557 static int open_video(AVFormatContext *oc, AVStream *st)
 558 {
 559         // Get the codec
 560         AVCodecContext *video_enc = st->codec;
 561
 562         // find the video encoder
 563         AVCodec *codec = avcodec_find_encoder( video_enc->codec_id );
 564
 565         if( codec && codec->pix_fmts )
 566         {
 567                 const enum PixelFormat *p = codec->pix_fmts;
 568                 for( ; *p!=-1; p++ )
 569                 {
 570                         if( *p == video_enc->pix_fmt )
 571                                 break;
 572                 }
 573                 if( *p == -1 )
 574                         video_enc->pix_fmt = codec->pix_fmts[ 0 ];
 575         }
 576
 577         // Open the codec safely
 578         return codec != NULL && avcodec_open( video_enc, codec ) >= 0;
 579 }
 580
 581 void close_video(AVFormatContext *oc, AVStream *st)
 582 {
 583         avcodec_close(st->codec);
 584 }
 585
 586 static inline long time_difference( struct timeval *time1 )
 587 {
 588         struct timeval time2;
 589         gettimeofday( &time2, NULL );
 590         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 591 }
 592
 593 /** The main thread - the argument is simply the consumer.
 594 */
 595
 596 static void *consumer_thread( void *arg )
 597 {
 598         // Map the argument to the object
 599         mlt_consumer this = arg;
 600
 601         // Get the properties
 602         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 603
 604         // Get the terminate on pause property
 605         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 606         int terminated = 0;
 607
 608         // Determine if feed is slow (for realtime stuff)
 609         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 610
 611         // Time structures
 612         struct timeval ante;
 613
 614         // Get the frame rate
 615         int fps = mlt_properties_get_double( properties, "fps" );
 616
 617         // Get width and height
 618         int width = mlt_properties_get_int( properties, "width" );
 619         int height = mlt_properties_get_int( properties, "height" );
 620         int img_width = width;
 621         int img_height = height;
 622
 623         // Get default audio properties
 624         mlt_audio_format aud_fmt = mlt_audio_pcm;
 625         int channels = mlt_properties_get_int( properties, "channels" );
 626         int frequency = mlt_properties_get_int( properties, "frequency" );
 627         int16_t *pcm = NULL;
 628         int samples = 0;
 629
 630         // AVFormat audio buffer and frame size
 631         int audio_outbuf_size = 10000;
 632         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 633         int audio_input_frame_size = 0;
 634
 635         // AVFormat video buffer and frame count
 636         int frame_count = 0;
 637         int video_outbuf_size = ( 1024 * 1024 );
 638         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 639
 640         // Used for the frame properties
 641         mlt_frame frame = NULL;
 642         mlt_properties frame_properties = NULL;
 643
 644         // Get the queues
 645         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 646         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 647
 648         // Need two av pictures for converting
 649         AVFrame *output = NULL;
 650         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 651
 652         // For receiving images from an mlt_frame
 653         uint8_t *image;
 654         mlt_image_format img_fmt = mlt_image_yuv422;
 655
 656         // For receiving audio samples back from the fifo
 657         int16_t *buffer = av_malloc( 48000 * 2 );
 658         int count = 0;
 659
 660         // Allocate the context
 661         AVFormatContext *oc = av_alloc_format_context( );
 662
 663         // Streams
 664         AVStream *audio_st = NULL;
 665         AVStream *video_st = NULL;
 666
 667         // Time stamps
 668         double audio_pts = 0;
 669         double video_pts = 0;
 670
 671         // Loop variable
 672         int i;
 673
 674         // Frames despatched
 675         long int frames = 0;
 676         long int total_time = 0;
 677
 678         // Determine the format
 679         AVOutputFormat *fmt = NULL;
 680         char *filename = mlt_properties_get( properties, "target" );
 681         char *format = mlt_properties_get( properties, "format" );
 682         char *vcodec = mlt_properties_get( properties, "vcodec" );
 683         char *acodec = mlt_properties_get( properties, "acodec" );
 684
 685         // Used to store and override codec ids
 686         int audio_codec_id;
 687         int video_codec_id;
 688
 689         // Check for user selected format first
 690         if ( format != NULL )
 691                 fmt = guess_format( format, NULL, NULL );
 692
 693         // Otherwise check on the filename
 694         if ( fmt == NULL && filename != NULL )
 695                 fmt = guess_format( NULL, filename, NULL );
 696
 697         // Otherwise default to mpeg
 698         if ( fmt == NULL )
 699                 fmt = guess_format( "mpeg", NULL, NULL );
 700
 701         // We need a filename - default to stdout?
 702         if ( filename == NULL || !strcmp( filename, "" ) )
 703                 filename = "pipe:";
 704
 705         // Get the codec ids selected
 706         audio_codec_id = fmt->audio_codec;
 707         video_codec_id = fmt->video_codec;
 708
 709         // Check for audio codec overides
 710         if ( acodec != NULL )
 711         {
 712                 AVCodec *p = first_avcodec;
 713                 while( p != NULL )
 714                 {
 715                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 716                                 break;
 717                         p = p->next;
 718                 }
 719                 if ( p != NULL )
 720                         audio_codec_id = p->id;
 721                 else
 722                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 723         }
 724
 725         // Check for video codec overides
 726         if ( vcodec != NULL )
 727         {
 728                 AVCodec *p = first_avcodec;
 729                 while( p != NULL )
 730                 {
 731                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 732                                 break;
 733                         p = p->next;
 734                 }
 735                 if ( p != NULL )
 736                         video_codec_id = p->id;
 737                 else
 738                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 739         }
 740
 741         // Update the output context
 742
 743         // Write metadata
 744         char *tmp = NULL;
 745         int metavalue;
 746
 747         tmp = mlt_properties_get( properties, "meta.attr.title.markup");
 748         if (tmp != NULL) snprintf( oc->title, sizeof(oc->title), "%s", tmp );
 749
 750         tmp = mlt_properties_get( properties, "meta.attr.comment.markup");
 751         if (tmp != NULL) snprintf( oc->comment, sizeof(oc->comment), "%s", tmp );
 752
 753         tmp = mlt_properties_get( properties, "meta.attr.author.markup");
 754         if (tmp != NULL) snprintf( oc->author, sizeof(oc->author), "%s", tmp );
 755
 756         tmp = mlt_properties_get( properties, "meta.attr.copyright.markup");
 757         if (tmp != NULL) snprintf( oc->copyright, sizeof(oc->copyright), "%s", tmp );
 758
 759         tmp = mlt_properties_get( properties, "meta.attr.album.markup");
 760         if (tmp != NULL) snprintf( oc->album, sizeof(oc->album), "%s", tmp );
 761
 762         metavalue = mlt_properties_get_int( properties, "meta.attr.year.markup");
 763         if (metavalue != 0) oc->year = metavalue;
 764
 765         metavalue = mlt_properties_get_int( properties, "meta.attr.track.markup");
 766         if (metavalue != 0) oc->track = metavalue;
 767
 768         oc->oformat = fmt;
 769         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 770
 771         // Add audio and video streams
 772         if ( fmt->video_codec != CODEC_ID_NONE )
 773                 video_st = add_video_stream( this, oc, video_codec_id );
 774         if ( fmt->audio_codec != CODEC_ID_NONE )
 775                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 776
 777         // Set the parameters (even though we have none...)
 778         if ( av_set_parameters(oc, NULL) >= 0 )
 779         {
 780                 if ( video_st && !open_video( oc, video_st ) )
 781                         video_st = NULL;
 782                 if ( audio_st )
 783                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 784
 785                 // Open the output file, if needed
 786                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 787                 {
 788                         if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 789                         {
 790                                 fprintf(stderr, "Could not open '%s'\n", filename);
 791                                 mlt_properties_set_int( properties, "running", 0 );
 792                         }
 793                 }
 794
 795                 // Write the stream header, if any
 796                 if ( mlt_properties_get_int( properties, "running" ) )
 797                         av_write_header( oc );
 798         }
 799         else
 800         {
 801                 fprintf(stderr, "Invalid output format parameters\n");
 802                 mlt_properties_set_int( properties, "running", 0 );
 803         }
 804
 805         // Allocate picture
 806         if ( video_st )
 807                 output = alloc_picture( video_st->codec->pix_fmt, width, height );
 808
 809         // Last check - need at least one stream
 810         if ( audio_st == NULL && video_st == NULL )
 811                 mlt_properties_set_int( properties, "running", 0 );
 812
 813         // Get the starting time (can ignore the times above)
 814         gettimeofday( &ante, NULL );
 815
 816         // Loop while running
 817         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 818         {
 819                 // Get the frame
 820                 frame = mlt_consumer_rt_frame( this );
 821
 822                 // Check that we have a frame to work with
 823                 if ( frame != NULL )
 824                 {
 825                         // Increment frames despatched
 826                         frames ++;
 827
 828                         // Default audio args
 829                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 830
 831                         // Check for the terminated condition
 832                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 833
 834                         // Get audio and append to the fifo
 835                         if ( !terminated && audio_st )
 836                         {
 837                                 samples = mlt_sample_calculator( fps, frequency, count ++ );
 838                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 839
 840                                 // Create the fifo if we don't have one
 841                                 if ( fifo == NULL )
 842                                 {
 843                                         fifo = sample_fifo_init( frequency, channels );
 844                                         mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
 845                                 }
 846
 847                                 if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
 848                                         memset( pcm, 0, samples * channels * 2 );
 849
 850                                 // Append the samples
 851                                 sample_fifo_append( fifo, pcm, samples * channels );
 852                                 total_time += ( samples * 1000000 ) / frequency;
 853                         }
 854
 855                         // Encode the image
 856                         if ( !terminated && video_st )
 857                                 mlt_deque_push_back( queue, frame );
 858                         else
 859                                 mlt_frame_close( frame );
 860                 }
 861
 862                 // While we have stuff to process, process...
 863                 while ( 1 )
 864                 {
 865                         if (audio_st)
 866                                 audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 867                         else
 868                                 audio_pts = 0.0;
 869
 870                         if (video_st)
 871                                 video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
 872                         else
 873                                 video_pts = 0.0;
 874
 875                         // Write interleaved audio and video frames
 876                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 877                         {
 878                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 879                                 {
 880                                         AVCodecContext *c;
 881                                         AVPacket pkt;
 882                                         av_init_packet( &pkt );
 883
 884                                         c = audio_st->codec;
 885
 886                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 887
 888                                         pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 889                                         // Write the compressed frame in the media file
 890                                         if ( c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE )
 891                                                 pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
 892                                         pkt.flags |= PKT_FLAG_KEY;
 893                                         pkt.stream_index= audio_st->index;
 894                                         pkt.data= audio_outbuf;
 895
 896                                         if ( pkt.size )
 897                                                 if ( av_interleaved_write_frame( oc, &pkt ) != 0)
 898                                                         fprintf(stderr, "Error while writing audio frame\n");
 899
 900                                         audio_pts += c->frame_size;
 901                                 }
 902                                 else
 903                                 {
 904                                         break;
 905                                 }
 906                         }
 907                         else if ( video_st )
 908                         {
 909                                 if ( mlt_deque_count( queue ) )
 910                                 {
 911                                         int out_size, ret;
 912                                         AVCodecContext *c;
 913
 914                                         frame = mlt_deque_pop_front( queue );
 915                                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 916
 917                                         c = video_st->codec;
 918
 919                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 920                                         {
 921                                                 int i = 0;
 922                                                 int j = 0;
 923                                                 uint8_t *p;
 924                                                 uint8_t *q;
 925
 926                                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 927
 928                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 929
 930                                                 q = image;
 931
 932                                                 // Convert the mlt frame to an AVPicture
 933                                                 for ( i = 0; i < height; i ++ )
 934                                                 {
 935                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 936                                                         j = width;
 937                                                         while( j -- )
 938                                                         {
 939                                                                 *p ++ = *q ++;
 940                                                                 *p ++ = *q ++;
 941                                                         }
 942                                                 }
 943
 944                                                 // Do the colour space conversion
 945 #ifdef SWSCALE
 946                                                 struct SwsContext *context = sws_getContext( width, height, PIX_FMT_YUV422,
 947                                                         width, height, video_st->codec->pix_fmt, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 948                                                 sws_scale( context, input->data, input->linesize, 0, height,
 949                                                         output->data, output->linesize);
 950                                                 sws_freeContext( context );
 951 #else
 952                                                 img_convert( ( AVPicture * )output, video_st->codec->pix_fmt, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 953 #endif
 954
 955                                                 // Apply the alpha if applicable
 956                                                 if ( video_st->codec->pix_fmt == PIX_FMT_RGBA32 )
 957                                                 {
 958                                                         uint8_t *alpha = mlt_frame_get_alpha_mask( frame );
 959                                                         register int n;
 960
 961                                                         for ( i = 0; i < height; i ++ )
 962                                                         {
 963                                                                 n = ( width + 7 ) / 8;
 964                                                                 p = output->data[ 0 ] + i * output->linesize[ 0 ];
 965
 966                                                                 #ifndef __DARWIN__
 967                                                                 p += 3;
 968                                                                 #endif
 969
 970                                                                 switch( width % 8 )
 971                                                                 {
 972                                                                         case 0: do { *p = *alpha++; p += 4;
 973                                                                         case 7:          *p = *alpha++; p += 4;
 974                                                                         case 6:          *p = *alpha++; p += 4;
 975                                                                         case 5:          *p = *alpha++; p += 4;
 976                                                                         case 4:          *p = *alpha++; p += 4;
 977                                                                         case 3:          *p = *alpha++; p += 4;
 978                                                                         case 2:          *p = *alpha++; p += 4;
 979                                                                         case 1:          *p = *alpha++; p += 4;
 980                                                                                         }
 981                                                                                         while( --n );
 982                                                                 }
 983                                                         }
 984                                                 }
 985                                         }
 986
 987                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 988                                         {
 989                                                 // raw video case. The API will change slightly in the near future for that
 990                                                 AVPacket pkt;
 991                                                 av_init_packet(&pkt);
 992
 993                                                 pkt.flags |= PKT_FLAG_KEY;
 994                                                 pkt.stream_index= video_st->index;
 995                                                 pkt.data= (uint8_t *)output;
 996                                                 pkt.size= sizeof(AVPicture);
 997
 998                                                 ret = av_write_frame(oc, &pkt);
 999                                                 video_pts += c->frame_size;
1000                                         }
1001                                         else
1002                                         {
1003                                                 // Set the quality
1004                                                 output->quality = video_st->quality;
1005
1006                                                 // Encode the image
1007                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
1008
1009                                                 // If zero size, it means the image was buffered
1010                                                 if (out_size > 0)
1011                                                 {
1012                                                         AVPacket pkt;
1013                                                         av_init_packet( &pkt );
1014
1015                                                         if ( c->coded_frame && c->coded_frame->pts != AV_NOPTS_VALUE )
1016                                                                 pkt.pts= av_rescale_q( c->coded_frame->pts, c->time_base, video_st->time_base );
1017                                                         if( c->coded_frame && c->coded_frame->key_frame )
1018                                                                 pkt.flags |= PKT_FLAG_KEY;
1019                                                         pkt.stream_index= video_st->index;
1020                                                         pkt.data= video_outbuf;
1021                                                         pkt.size= out_size;
1022
1023                                         // write the compressed frame in the media file
1024                                                         ret = av_interleaved_write_frame(oc, &pkt);
1025                                                         video_pts += c->frame_size;
1026                                                 }
1027                                                 else
1028                                                 {
1029                                                         fprintf( stderr, "Error with video encode\n" );
1030                                                 }
1031                                         }
1032                                         frame_count++;
1033                                         mlt_frame_close( frame );
1034                                 }
1035                                 else
1036                                 {
1037                                         break;
1038                                 }
1039                         }
1040                 }
1041
1042                 if ( real_time_output && frames % 12 == 0 )
1043                 {
1044                         long passed = time_difference( &ante );
1045                         if ( fifo != NULL )
1046                         {
1047                                 long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
1048                                 passed -= pending;
1049                         }
1050                         if ( passed < total_time )
1051                         {
1052                                 long total = ( total_time - passed );
1053                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
1054                                 nanosleep( &t, NULL );
1055                         }
1056                 }
1057         }
1058
1059         // close each codec
1060         if (video_st)
1061                 close_video(oc, video_st);
1062         if (audio_st)
1063                 close_audio(oc, audio_st);
1064
1065         // Write the trailer, if any
1066         av_write_trailer(oc);
1067
1068         // Free the streams
1069         for(i = 0; i < oc->nb_streams; i++)
1070                 av_freep(&oc->streams[i]);
1071
1072         // Close the output file
1073         if (!(fmt->flags & AVFMT_NOFILE))
1074                 url_fclose(&oc->pb);
1075
1076         // Clean up input and output frames
1077         if ( output )
1078                 av_free( output->data[0] );
1079         av_free( output );
1080         av_free( input->data[0] );
1081         av_free( input );
1082         av_free( video_outbuf );
1083         av_free( buffer );
1084
1085         // Free the stream
1086         av_free(oc);
1087
1088         // Just in case we terminated on pause
1089         mlt_properties_set_int( properties, "running", 0 );
1090
1091         mlt_consumer_stopped( this );
1092
1093         return NULL;
1094 }
1095
1096 /** Close the consumer.
1097 */
1098
1099 static void consumer_close( mlt_consumer this )
1100 {
1101         // Stop the consumer
1102         mlt_consumer_stop( this );
1103
1104         // Close the parent
1105         mlt_consumer_close( this );
1106
1107         // Free the memory
1108         free( this );
1109 }