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

   1 /*
   2  * consumer_avformat.c -- an encoder based on avformat
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 // Local header files
  22 #include "consumer_avformat.h"
  23
  24 // mlt Header files
  25 #include <framework/mlt_frame.h>
  26
  27 // System header files
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <limits.h>
  32 #include <pthread.h>
  33 #include <sys/time.h>
  34 #include <math.h>
  35
  36 // avformat header files
  37 #include <avformat.h>
  38
  39 //
  40 // This structure should be extended and made globally available in mlt
  41 //
  42
  43 typedef struct
  44 {
  45         int16_t *buffer;
  46         int size;
  47         int used;
  48         double time;
  49         int frequency;
  50         int channels;
  51 }
  52 *sample_fifo, sample_fifo_s;
  53
  54 sample_fifo sample_fifo_init( int frequency, int channels )
  55 {
  56         sample_fifo this = calloc( 1, sizeof( sample_fifo_s ) );
  57         this->frequency = frequency;
  58         this->channels = channels;
  59         return this;
  60 }
  61
  62 // sample_fifo_clear and check are temporarily aborted (not working as intended)
  63
  64 void sample_fifo_clear( sample_fifo this, double time )
  65 {
  66         int words = ( float )( time - this->time ) * this->frequency * this->channels;
  67         if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) && this->used > words && words > 0 )
  68         {
  69                 memmove( this->buffer, &this->buffer[ words ], ( this->used - words ) * sizeof( int16_t ) );
  70                 this->used -= words;
  71                 this->time = time;
  72         }
  73         else if ( ( int )( ( float )time * 100 ) != ( int )( ( float )this->time * 100 ) )
  74         {
  75                 this->used = 0;
  76                 this->time = time;
  77         }
  78 }
  79
  80 void sample_fifo_check( sample_fifo this, double time )
  81 {
  82         if ( this->used == 0 )
  83         {
  84                 if ( ( int )( ( float )time * 100 ) < ( int )( ( float )this->time * 100 ) )
  85                         this->time = time;
  86         }
  87 }
  88
  89 void sample_fifo_append( sample_fifo this, int16_t *samples, int count )
  90 {
  91         if ( ( this->size - this->used ) < count )
  92         {
  93                 this->size += count * 5;
  94                 this->buffer = realloc( this->buffer, this->size * sizeof( int16_t ) );
  95         }
  96
  97         memcpy( &this->buffer[ this->used ], samples, count * sizeof( int16_t ) );
  98         this->used += count;
  99 }
 100
 101 int sample_fifo_used( sample_fifo this )
 102 {
 103         return this->used;
 104 }
 105
 106 int sample_fifo_fetch( sample_fifo this, int16_t *samples, int count )
 107 {
 108         if ( count > this->used )
 109                 count = this->used;
 110
 111         memcpy( samples, this->buffer, count * sizeof( int16_t ) );
 112         this->used -= count;
 113         memmove( this->buffer, &this->buffer[ count ], this->used * sizeof( int16_t ) );
 114
 115         this->time += ( double )count / this->channels / this->frequency;
 116
 117         return count;
 118 }
 119
 120 void sample_fifo_close( sample_fifo this )
 121 {
 122         free( this->buffer );
 123         free( this );
 124 }
 125
 126 // Forward references.
 127 static int consumer_start( mlt_consumer this );
 128 static int consumer_stop( mlt_consumer this );
 129 static int consumer_is_stopped( mlt_consumer this );
 130 static void *consumer_thread( void *arg );
 131 static void consumer_close( mlt_consumer this );
 132
 133 /** Initialise the dv consumer.
 134 */
 135
 136 mlt_consumer consumer_avformat_init( char *arg )
 137 {
 138         // Allocate the consumer
 139         mlt_consumer this = mlt_consumer_new( );
 140
 141         // If memory allocated and initialises without error
 142         if ( this != NULL )
 143         {
 144                 // Get properties from the consumer
 145                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 146
 147                 // Assign close callback
 148                 this->close = consumer_close;
 149
 150                 // Interpret the argument
 151                 if ( arg != NULL )
 152                         mlt_properties_set( properties, "target", arg );
 153
 154                 // sample and frame queue
 155                 mlt_properties_set_data( properties, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
 156
 157                 // Set avformat defaults (all lifted from ffmpeg.c)
 158                 mlt_properties_set_int( properties, "audio_bit_rate", 128000 );
 159                 mlt_properties_set_int( properties, "video_bit_rate", 200 * 1000 );
 160                 mlt_properties_set_int( properties, "video_bit_rate_tolerance", 4000 * 1000 );
 161                 mlt_properties_set_int( properties, "gop_size", 12 );
 162                 mlt_properties_set_int( properties, "b_frames", 0 );
 163                 mlt_properties_set_int( properties, "mb_decision", FF_MB_DECISION_SIMPLE );
 164                 mlt_properties_set_double( properties, "qscale", 0 );
 165                 mlt_properties_set_int( properties, "me_method", ME_EPZS );
 166                 mlt_properties_set_int( properties, "mb_cmp", FF_CMP_SAD );
 167                 mlt_properties_set_int( properties, "ildct_cmp", FF_CMP_VSAD );
 168                 mlt_properties_set_int( properties, "sub_cmp", FF_CMP_SAD );
 169                 mlt_properties_set_int( properties, "cmp", FF_CMP_SAD );
 170                 mlt_properties_set_int( properties, "pre_cmp", FF_CMP_SAD );
 171                 mlt_properties_set_int( properties, "pre_me", 0 );
 172                 mlt_properties_set_double( properties, "lumi_mask", 0 );
 173                 mlt_properties_set_double( properties, "dark_mask", 0 );
 174                 mlt_properties_set_double( properties, "scplx_mask", 0 );
 175                 mlt_properties_set_double( properties, "tcplx_mask", 0 );
 176                 mlt_properties_set_double( properties, "p_mask", 0 );
 177                 mlt_properties_set_int( properties, "qns", 0 );
 178                 mlt_properties_set_int( properties, "video_qmin", 2 );
 179                 mlt_properties_set_int( properties, "video_qmax", 31 );
 180                 mlt_properties_set_int( properties, "video_lmin", 2*FF_QP2LAMBDA );
 181                 mlt_properties_set_int( properties, "video_lmax", 31*FF_QP2LAMBDA );
 182                 mlt_properties_set_int( properties, "video_mb_qmin", 2 );
 183                 mlt_properties_set_int( properties, "video_mb_qmax", 31 );
 184                 mlt_properties_set_int( properties, "video_qdiff", 3 );
 185                 mlt_properties_set_double( properties, "video_qblur", 0.5 );
 186                 mlt_properties_set_double( properties, "video_qcomp", 0.5 );
 187                 mlt_properties_set_int( properties, "video_rc_max_rate", 0 );
 188                 mlt_properties_set_int( properties, "video_rc_min_rate", 0 );
 189                 mlt_properties_set_int( properties, "video_rc_buffer_size", 0 );
 190                 mlt_properties_set_double( properties, "video_rc_buffer_aggressivity", 1.0 );
 191                 mlt_properties_set_double( properties, "video_rc_initial_cplx", 0 );
 192                 mlt_properties_set_double( properties, "video_i_qfactor", 1.25 );
 193                 mlt_properties_set_double( properties, "video_b_qfactor", 1.25 );
 194                 mlt_properties_set_double( properties, "video_i_qoffset", -0.8 );
 195                 mlt_properties_set_double( properties, "video_b_qoffset", 0 );
 196                 mlt_properties_set_int( properties, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS );
 197                 mlt_properties_set_int( properties, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS );
 198                 mlt_properties_set_int( properties, "dct_algo", 0 );
 199                 mlt_properties_set_int( properties, "idct_algo", 0 );
 200                 mlt_properties_set_int( properties, "me_threshold", 0 );
 201                 mlt_properties_set_int( properties, "mb_threshold", 0 );
 202                 mlt_properties_set_int( properties, "intra_dc_precision", 0 );
 203                 mlt_properties_set_int( properties, "strict", 0 );
 204                 mlt_properties_set_int( properties, "error_rate", 0 );
 205                 mlt_properties_set_int( properties, "noise_reduction", 0 );
 206                 mlt_properties_set_int( properties, "sc_threshold", 0 );
 207                 mlt_properties_set_int( properties, "me_range", 0 );
 208                 mlt_properties_set_int( properties, "coder", 0 );
 209                 mlt_properties_set_int( properties, "context", 0 );
 210                 mlt_properties_set_int( properties, "predictor", 0 );
 211
 212                 // Ensure termination at end of the stream
 213                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
 214
 215                 // Set up start/stop/terminated callbacks
 216                 this->start = consumer_start;
 217                 this->stop = consumer_stop;
 218                 this->is_stopped = consumer_is_stopped;
 219         }
 220
 221         // Return this
 222         return this;
 223 }
 224
 225 /** Start the consumer.
 226 */
 227
 228 static int consumer_start( mlt_consumer this )
 229 {
 230         // Get the properties
 231         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 232
 233         // Check that we're not already running
 234         if ( !mlt_properties_get_int( properties, "running" ) )
 235         {
 236                 // Allocate a thread
 237                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 238
 239                 // Get the width and height
 240                 int width = mlt_properties_get_int( properties, "width" );
 241                 int height = mlt_properties_get_int( properties, "height" );
 242
 243                 // Obtain the size property
 244                 char *size = mlt_properties_get( properties, "size" );
 245
 246                 // Interpret it
 247                 if ( size != NULL )
 248                 {
 249                         int tw, th;
 250                         if ( sscanf( size, "%dx%d", &tw, &th ) == 2 && tw > 0 && th > 0 )
 251                         {
 252                                 width = tw;
 253                                 height = th;
 254                         }
 255                         else
 256                         {
 257                                 fprintf( stderr, "consumer_avformat: Invalid size property %s - ignoring.\n", size );
 258                         }
 259                 }
 260
 261                 // Now ensure we honour the multiple of two requested by libavformat
 262                 mlt_properties_set_int( properties, "width", ( width / 2 ) * 2 );
 263                 mlt_properties_set_int( properties, "height", ( height / 2 ) * 2 );
 264
 265                 // Assign the thread to properties
 266                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 267
 268                 // Set the running state
 269                 mlt_properties_set_int( properties, "running", 1 );
 270
 271                 // Create the thread
 272                 pthread_create( thread, NULL, consumer_thread, this );
 273         }
 274         return 0;
 275 }
 276
 277 /** Stop the consumer.
 278 */
 279
 280 static int consumer_stop( mlt_consumer this )
 281 {
 282         // Get the properties
 283         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 284
 285         // Check that we're running
 286         if ( mlt_properties_get_int( properties, "running" ) )
 287         {
 288                 // Get the thread
 289                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 290
 291                 // Stop the thread
 292                 mlt_properties_set_int( properties, "running", 0 );
 293
 294                 // Wait for termination
 295                 pthread_join( *thread, NULL );
 296         }
 297
 298         return 0;
 299 }
 300
 301 /** Determine if the consumer is stopped.
 302 */
 303
 304 static int consumer_is_stopped( mlt_consumer this )
 305 {
 306         // Get the properties
 307         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 308         return !mlt_properties_get_int( properties, "running" );
 309 }
 310
 311 /** Add an audio output stream
 312 */
 313
 314 static AVStream *add_audio_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 315 {
 316         // Get the properties
 317         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 318
 319         // Create a new stream
 320         AVStream *st = av_new_stream( oc, 1 );
 321
 322         // If created, then initialise from properties
 323         if ( st != NULL )
 324         {
 325                 AVCodecContext *c = &st->codec;
 326                 c->codec_id = codec_id;
 327                 c->codec_type = CODEC_TYPE_AUDIO;
 328
 329                 // Put sample parameters
 330                 c->bit_rate = mlt_properties_get_int( properties, "audio_bit_rate" );
 331                 c->sample_rate = mlt_properties_get_int( properties, "frequency" );
 332                 c->channels = mlt_properties_get_int( properties, "channels" );
 333
 334                 // Allow the user to override the audio fourcc
 335                 if ( mlt_properties_get( properties, "afourcc" ) )
 336                 {
 337                         char *tail = NULL;
 338                         char *arg = mlt_properties_get( properties, "afourcc" );
 339                 int tag = strtol( arg, &tail, 0);
 340                 if( !tail || *tail )
 341                         tag = arg[ 0 ] + ( arg[ 1 ] << 8 ) + ( arg[ 2 ] << 16 ) + ( arg[ 3 ] << 24 );
 342                         c->codec_tag = tag;
 343                 }
 344         }
 345         else
 346         {
 347                 fprintf( stderr, "Could not allocate a stream for audio\n" );
 348         }
 349
 350         return st;
 351 }
 352
 353 static int open_audio( AVFormatContext *oc, AVStream *st, int audio_outbuf_size )
 354 {
 355         // We will return the audio input size from here
 356         int audio_input_frame_size = 0;
 357
 358         // Get the context
 359         AVCodecContext *c = &st->codec;
 360
 361         // Find the encoder
 362         AVCodec *codec = avcodec_find_encoder( c->codec_id );
 363
 364         // Continue if codec found and we can open it
 365         if ( codec != NULL && avcodec_open(c, codec) >= 0 )
 366         {
 367                 // ugly hack for PCM codecs (will be removed ASAP with new PCM
 368                 // support to compute the input frame size in samples
 369                 if ( c->frame_size <= 1 )
 370                 {
 371                         audio_input_frame_size = audio_outbuf_size / c->channels;
 372                         switch(st->codec.codec_id)
 373                         {
 374                                 case CODEC_ID_PCM_S16LE:
 375                                 case CODEC_ID_PCM_S16BE:
 376                                 case CODEC_ID_PCM_U16LE:
 377                                 case CODEC_ID_PCM_U16BE:
 378                                         audio_input_frame_size >>= 1;
 379                                         break;
 380                                 default:
 381                                         break;
 382                         }
 383                 }
 384                 else
 385                 {
 386                         audio_input_frame_size = c->frame_size;
 387                 }
 388
 389                 // Some formats want stream headers to be seperate (hmm)
 390                 if( !strcmp( oc->oformat->name, "mp4" ) ||
 391                         !strcmp( oc->oformat->name, "mov" ) ||
 392                         !strcmp( oc->oformat->name, "3gp" ) )
 393                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 394         }
 395         else
 396         {
 397                 fprintf( stderr, "Unable to encode audio - disabling audio output.\n" );
 398         }
 399
 400         return audio_input_frame_size;
 401 }
 402
 403 static void close_audio( AVFormatContext *oc, AVStream *st )
 404 {
 405         avcodec_close( &st->codec );
 406 }
 407
 408 /** Add a video output stream
 409 */
 410
 411 static AVStream *add_video_stream( mlt_consumer this, AVFormatContext *oc, int codec_id )
 412 {
 413         // Get the properties
 414         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 415
 416         // Create a new stream
 417         AVStream *st = av_new_stream( oc, 0 );
 418
 419         if ( st != NULL )
 420         {
 421                 AVCodecContext *c = &st->codec;
 422                 c->codec_id = codec_id;
 423                 c->codec_type = CODEC_TYPE_VIDEO;
 424
 425                 // put sample parameters
 426                 c->bit_rate = mlt_properties_get_int( properties, "video_bit_rate" );
 427                 c->bit_rate_tolerance = mlt_properties_get_int( properties, "video_bit_rate_tolerance" );
 428                 c->width = mlt_properties_get_int( properties, "width" );
 429                 c->height = mlt_properties_get_int( properties, "height" );
 430                 c->time_base.num = mlt_properties_get_int( properties, "frame_rate_den" );
 431                 c->time_base.den = mlt_properties_get_int( properties, "frame_rate_num" );
 432                 c->gop_size = mlt_properties_get_int( properties, "gop_size" );
 433                 c->pix_fmt = PIX_FMT_YUV420P;
 434
 435                 if ( mlt_properties_get_int( properties, "b_frames" ) )
 436                 {
 437                         c->max_b_frames = mlt_properties_get_int( properties, "b_frames" );
 438                         c->b_frame_strategy = 0;
 439                         c->b_quant_factor = 2.0;
 440                 }
 441
 442                 c->mb_decision = mlt_properties_get_int( properties, "mb_decision" );
 443                 c->sample_aspect_ratio = av_d2q( mlt_properties_get_double( properties, "display_ratio" ) * c->height / c->width, 255 );
 444                 c->mb_cmp = mlt_properties_get_int( properties, "mb_cmp" );
 445                 c->ildct_cmp = mlt_properties_get_int( properties, "ildct_cmp" );
 446                 c->me_sub_cmp = mlt_properties_get_int( properties, "sub_cmp" );
 447                 c->me_cmp = mlt_properties_get_int( properties, "cmp" );
 448                 c->me_pre_cmp = mlt_properties_get_int( properties, "pre_cmp" );
 449                 c->pre_me = mlt_properties_get_int( properties, "pre_me" );
 450                 c->lumi_masking = mlt_properties_get_double( properties, "lumi_mask" );
 451                 c->dark_masking = mlt_properties_get_double( properties, "dark_mask" );
 452                 c->spatial_cplx_masking = mlt_properties_get_double( properties, "scplx_mask" );
 453                 c->temporal_cplx_masking = mlt_properties_get_double( properties, "tcplx_mask" );
 454                 c->p_masking = mlt_properties_get_double( properties, "p_mask" );
 455                 c->quantizer_noise_shaping= mlt_properties_get_int( properties, "qns" );
 456                 c->qmin = mlt_properties_get_int( properties, "video_qmin" );
 457                 c->qmax = mlt_properties_get_int( properties, "video_qmax" );
 458                 c->lmin = mlt_properties_get_int( properties, "video_lmin" );
 459                 c->lmax = mlt_properties_get_int( properties, "video_lmax" );
 460                 c->mb_qmin = mlt_properties_get_int( properties, "video_mb_qmin" );
 461                 c->mb_qmax = mlt_properties_get_int( properties, "video_mb_qmax" );
 462                 c->max_qdiff = mlt_properties_get_int( properties, "video_qdiff" );
 463                 c->qblur = mlt_properties_get_double( properties, "video_qblur" );
 464                 c->qcompress = mlt_properties_get_double( properties, "video_qcomp" );
 465
 466                 if ( mlt_properties_get_double( properties, "qscale" ) > 0 )
 467                 {
 468                         c->flags |= CODEC_FLAG_QSCALE;
 469                         st->quality = FF_QP2LAMBDA * mlt_properties_get_double( properties, "qscale" );
 470                 }
 471
 472                 // Allow the user to override the video fourcc
 473                 if ( mlt_properties_get( properties, "vfourcc" ) )
 474                 {
 475                         char *tail = NULL;
 476                         const char *arg = mlt_properties_get( properties, "vfourcc" );
 477                 int tag = strtol( arg, &tail, 0);
 478                 if( !tail || *tail )
 479                         tag = arg[ 0 ] + ( arg[ 1 ] << 8 ) + ( arg[ 2 ] << 16 ) + ( arg[ 3 ] << 24 );
 480                         c->codec_tag = tag;
 481                 }
 482
 483                 // Some formats want stream headers to be seperate
 484                 if ( oc->oformat->flags & AVFMT_GLOBALHEADER )
 485                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 486
 487                 c->rc_max_rate = mlt_properties_get_int( properties, "video_rc_max_rate" );
 488                 c->rc_min_rate = mlt_properties_get_int( properties, "video_rc_min_rate" );
 489                 c->rc_buffer_size = mlt_properties_get_int( properties, "video_rc_buffer_size" );
 490                 c->rc_buffer_aggressivity= mlt_properties_get_double( properties, "video_rc_buffer_aggressivity" );
 491                 c->rc_initial_cplx= mlt_properties_get_double( properties, "video_rc_initial_cplx" );
 492                 c->i_quant_factor = mlt_properties_get_double( properties, "video_i_qfactor" );
 493                 c->b_quant_factor = mlt_properties_get_double( properties, "video_b_qfactor" );
 494                 c->i_quant_offset = mlt_properties_get_double( properties, "video_i_qoffset" );
 495                 c->b_quant_offset = mlt_properties_get_double( properties, "video_b_qoffset" );
 496                 c->intra_quant_bias = mlt_properties_get_int( properties, "video_intra_quant_bias" );
 497                 c->inter_quant_bias = mlt_properties_get_int( properties, "video_inter_quant_bias" );
 498                 c->dct_algo = mlt_properties_get_int( properties, "dct_algo" );
 499                 c->idct_algo = mlt_properties_get_int( properties, "idct_algo" );
 500                 c->me_threshold= mlt_properties_get_int( properties, "me_threshold" );
 501                 c->mb_threshold= mlt_properties_get_int( properties, "mb_threshold" );
 502                 c->intra_dc_precision= mlt_properties_get_int( properties, "intra_dc_precision" );
 503                 c->strict_std_compliance = mlt_properties_get_int( properties, "strict" );
 504                 c->error_rate = mlt_properties_get_int( properties, "error_rate" );
 505                 c->noise_reduction= mlt_properties_get_int( properties, "noise_reduction" );
 506                 c->scenechange_threshold= mlt_properties_get_int( properties, "sc_threshold" );
 507                 c->me_range = mlt_properties_get_int( properties, "me_range" );
 508                 c->coder_type= mlt_properties_get_int( properties, "coder" );
 509                 c->context_model= mlt_properties_get_int( properties, "context" );
 510                 c->prediction_method= mlt_properties_get_int( properties, "predictor" );
 511                 c->me_method = mlt_properties_get_int( properties, "me_method" );
 512         }
 513         else
 514         {
 515                 fprintf( stderr, "Could not allocate a stream for video\n" );
 516         }
 517
 518         return st;
 519 }
 520
 521 static AVFrame *alloc_picture( int pix_fmt, int width, int height )
 522 {
 523         // Allocate a frame
 524         AVFrame *picture = avcodec_alloc_frame();
 525
 526         // Determine size of the
 527         int size = avpicture_get_size(pix_fmt, width, height);
 528
 529         // Allocate the picture buf
 530         uint8_t *picture_buf = av_malloc(size);
 531
 532         // If we have both, then fill the image
 533         if ( picture != NULL && picture_buf != NULL )
 534         {
 535                 // Fill the frame with the allocated buffer
 536                 avpicture_fill( (AVPicture *)picture, picture_buf, pix_fmt, width, height);
 537         }
 538         else
 539         {
 540                 // Something failed - clean up what we can
 541                 av_free( picture );
 542                 av_free( picture_buf );
 543                 picture = NULL;
 544         }
 545
 546         return picture;
 547 }
 548
 549 static int open_video(AVFormatContext *oc, AVStream *st)
 550 {
 551         // Get the codec
 552         AVCodecContext *video_enc = &st->codec;
 553
 554         // find the video encoder
 555         AVCodec *codec = avcodec_find_encoder( video_enc->codec_id );
 556
 557         if( codec && codec->supported_framerates )
 558         {
 559                 const AVRational *p = codec->supported_framerates;
 560                 AVRational req = ( AVRational ){ video_enc->time_base.num, video_enc->time_base.den };
 561                 const AVRational *best = NULL;
 562                 AVRational best_error = (AVRational){ INT_MAX, 1 };
 563                 for( ; p->den!=0; p++ )
 564                 {
 565                         AVRational error= av_sub_q( req, *p );
 566                         if( error.num < 0 )
 567                                 error.num *= -1;
 568                         if( av_cmp_q( error, best_error ) < 0 )
 569                         {
 570                                 best_error = error;
 571                                 best = p;
 572                         }
 573                 }
 574                 video_enc->time_base.num = best->num;
 575                 video_enc->time_base.den = best->den;
 576         }
 577
 578         if( codec && codec->pix_fmts )
 579         {
 580                 const enum PixelFormat *p = codec->pix_fmts;
 581                 for( ; *p!=-1; p++ )
 582                 {
 583                         if( *p == video_enc->pix_fmt )
 584                                 break;
 585                 }
 586                 if( *p == -1 )
 587                         video_enc->pix_fmt = codec->pix_fmts[ 0 ];
 588         }
 589
 590         // Open the codec safely
 591         return codec != NULL && avcodec_open( video_enc, codec ) >= 0;
 592 }
 593
 594 void close_video(AVFormatContext *oc, AVStream *st)
 595 {
 596         avcodec_close(&st->codec);
 597 }
 598
 599 static inline long time_difference( struct timeval *time1 )
 600 {
 601         struct timeval time2;
 602         gettimeofday( &time2, NULL );
 603         return time2.tv_sec * 1000000 + time2.tv_usec - time1->tv_sec * 1000000 - time1->tv_usec;
 604 }
 605
 606 /** The main thread - the argument is simply the consumer.
 607 */
 608
 609 static void *consumer_thread( void *arg )
 610 {
 611         // Map the argument to the object
 612         mlt_consumer this = arg;
 613
 614         // Get the properties
 615         mlt_properties properties = MLT_CONSUMER_PROPERTIES( this );
 616
 617         // Get the terminate on pause property
 618         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 619         int terminated = 0;
 620
 621         // Determine if feed is slow (for realtime stuff)
 622         int real_time_output = mlt_properties_get_int( properties, "real_time" );
 623
 624         // Time structures
 625         struct timeval ante;
 626
 627         // Get the frame rate
 628         int fps = mlt_properties_get_double( properties, "fps" );
 629
 630         // Get width and height
 631         int width = mlt_properties_get_int( properties, "width" );
 632         int height = mlt_properties_get_int( properties, "height" );
 633         int img_width = width;
 634         int img_height = height;
 635
 636         // Get default audio properties
 637         mlt_audio_format aud_fmt = mlt_audio_pcm;
 638         int channels = mlt_properties_get_int( properties, "channels" );
 639         int frequency = mlt_properties_get_int( properties, "frequency" );
 640         int16_t *pcm = NULL;
 641         int samples = 0;
 642
 643         // AVFormat audio buffer and frame size
 644         int audio_outbuf_size = 10000;
 645         uint8_t *audio_outbuf = av_malloc( audio_outbuf_size );
 646         int audio_input_frame_size = 0;
 647
 648         // AVFormat video buffer and frame count
 649         int frame_count = 0;
 650         int video_outbuf_size = ( 1024 * 1024 );
 651         uint8_t *video_outbuf = av_malloc( video_outbuf_size );
 652
 653         // Used for the frame properties
 654         mlt_frame frame = NULL;
 655         mlt_properties frame_properties = NULL;
 656
 657         // Get the queues
 658         mlt_deque queue = mlt_properties_get_data( properties, "frame_queue", NULL );
 659         sample_fifo fifo = mlt_properties_get_data( properties, "sample_fifo", NULL );
 660
 661         // Need two av pictures for converting
 662         AVFrame *output = NULL;
 663         AVFrame *input = alloc_picture( PIX_FMT_YUV422, width, height );
 664
 665         // For receiving images from an mlt_frame
 666         uint8_t *image;
 667         mlt_image_format img_fmt = mlt_image_yuv422;
 668
 669         // For receiving audio samples back from the fifo
 670         int16_t *buffer = av_malloc( 48000 * 2 );
 671         int count = 0;
 672
 673         // Allocate the context
 674         AVFormatContext *oc = av_alloc_format_context( );
 675
 676         // Streams
 677         AVStream *audio_st = NULL;
 678         AVStream *video_st = NULL;
 679
 680         // Time stamps
 681         double audio_pts = 0;
 682         double video_pts = 0;
 683
 684         // Loop variable
 685         int i;
 686
 687         // Frames despatched
 688         long int frames = 0;
 689         long int total_time = 0;
 690
 691         // Determine the format
 692         AVOutputFormat *fmt = NULL;
 693         char *filename = mlt_properties_get( properties, "target" );
 694         char *format = mlt_properties_get( properties, "format" );
 695         char *vcodec = mlt_properties_get( properties, "vcodec" );
 696         char *acodec = mlt_properties_get( properties, "acodec" );
 697
 698         // Used to store and override codec ids
 699         int audio_codec_id;
 700         int video_codec_id;
 701
 702         // Check for user selected format first
 703         if ( format != NULL )
 704                 fmt = guess_format( format, NULL, NULL );
 705
 706         // Otherwise check on the filename
 707         if ( fmt == NULL && filename != NULL )
 708                 fmt = guess_format( NULL, filename, NULL );
 709
 710         // Otherwise default to mpeg
 711         if ( fmt == NULL )
 712                 fmt = guess_format( "mpeg", NULL, NULL );
 713
 714         // We need a filename - default to stdout?
 715         if ( filename == NULL || !strcmp( filename, "" ) )
 716                 filename = "pipe:";
 717
 718         // Get the codec ids selected
 719         audio_codec_id = fmt->audio_codec;
 720         video_codec_id = fmt->video_codec;
 721
 722         // Check for audio codec overides
 723         if ( acodec != NULL )
 724         {
 725                 AVCodec *p = first_avcodec;
 726                 while( p != NULL )
 727                 {
 728                         if ( !strcmp( p->name, acodec ) && p->type == CODEC_TYPE_AUDIO )
 729                                 break;
 730                         p = p->next;
 731                 }
 732                 if ( p != NULL )
 733                         audio_codec_id = p->id;
 734                 else
 735                         fprintf( stderr, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec );
 736         }
 737
 738         // Check for video codec overides
 739         if ( vcodec != NULL )
 740         {
 741                 AVCodec *p = first_avcodec;
 742                 while( p != NULL )
 743                 {
 744                         if ( !strcmp( p->name, vcodec ) && p->type == CODEC_TYPE_VIDEO )
 745                                 break;
 746                         p = p->next;
 747                 }
 748                 if ( p != NULL )
 749                         video_codec_id = p->id;
 750                 else
 751                         fprintf( stderr, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec );
 752         }
 753
 754         // Update the output context
 755         oc->oformat = fmt;
 756         snprintf( oc->filename, sizeof(oc->filename), "%s", filename );
 757
 758         // Add audio and video streams
 759         if ( fmt->video_codec != CODEC_ID_NONE )
 760                 video_st = add_video_stream( this, oc, video_codec_id );
 761         if ( fmt->audio_codec != CODEC_ID_NONE )
 762                 audio_st = add_audio_stream( this, oc, audio_codec_id );
 763
 764         // Set the parameters (even though we have none...)
 765         if ( av_set_parameters(oc, NULL) >= 0 )
 766         {
 767                 if ( video_st && !open_video( oc, video_st ) )
 768                         video_st = NULL;
 769                 if ( audio_st )
 770                         audio_input_frame_size = open_audio( oc, audio_st, audio_outbuf_size );
 771
 772                 // Open the output file, if needed
 773                 if ( !( fmt->flags & AVFMT_NOFILE ) )
 774                 {
 775                         if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0)
 776                         {
 777                                 fprintf(stderr, "Could not open '%s'\n", filename);
 778                                 mlt_properties_set_int( properties, "running", 0 );
 779                         }
 780                 }
 781
 782                 // Write the stream header, if any
 783                 if ( mlt_properties_get_int( properties, "running" ) )
 784                         av_write_header( oc );
 785         }
 786         else
 787         {
 788                 fprintf(stderr, "Invalid output format parameters\n");
 789                 mlt_properties_set_int( properties, "running", 0 );
 790         }
 791
 792         // Allocate picture
 793         if ( video_st )
 794                 output = alloc_picture( video_st->codec.pix_fmt, width, height );
 795
 796         // Last check - need at least one stream
 797         if ( audio_st == NULL && video_st == NULL )
 798                 mlt_properties_set_int( properties, "running", 0 );
 799
 800         // Get the starting time (can ignore the times above)
 801         gettimeofday( &ante, NULL );
 802
 803         // Loop while running
 804         while( mlt_properties_get_int( properties, "running" ) && !terminated )
 805         {
 806                 // Get the frame
 807                 frame = mlt_consumer_rt_frame( this );
 808
 809                 // Check that we have a frame to work with
 810                 if ( frame != NULL )
 811                 {
 812                         // Increment frames despatched
 813                         frames ++;
 814
 815                         // Default audio args
 816                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 817
 818                         // Check for the terminated condition
 819                         terminated = terminate_on_pause && mlt_properties_get_double( frame_properties, "_speed" ) == 0.0;
 820
 821                         // Get audio and append to the fifo
 822                         if ( !terminated && audio_st )
 823                         {
 824                                 samples = mlt_sample_calculator( fps, frequency, count );
 825                                 mlt_frame_get_audio( frame, &pcm, &aud_fmt, &frequency, &channels, &samples );
 826
 827                                 // Create the fifo if we don't have one
 828                                 if ( fifo == NULL )
 829                                 {
 830                                         fifo = sample_fifo_init( frequency, channels );
 831                                         mlt_properties_set_data( properties, "sample_fifo", fifo, 0, ( mlt_destructor )sample_fifo_close, NULL );
 832                                 }
 833
 834                                 if ( mlt_properties_get_double( frame_properties, "_speed" ) != 1.0 )
 835                                         memset( pcm, 0, samples * channels * 2 );
 836
 837                                 // Append the samples
 838                                 sample_fifo_append( fifo, pcm, samples * channels );
 839                                 total_time += ( samples * 1000000 ) / frequency;
 840                         }
 841
 842                         // Encode the image
 843                         if ( !terminated && video_st )
 844                                 mlt_deque_push_back( queue, frame );
 845                         else
 846                                 mlt_frame_close( frame );
 847                 }
 848
 849                 // While we have stuff to process, process...
 850                 while ( 1 )
 851                 {
 852                         if (audio_st)
 853                                 audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
 854                         else
 855                                 audio_pts = 0.0;
 856
 857                         if (video_st)
 858                                 video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
 859                         else
 860                                 video_pts = 0.0;
 861
 862                         // Write interleaved audio and video frames
 863                         if ( !video_st || ( video_st && audio_st && audio_pts < video_pts ) )
 864                         {
 865                                 if ( channels * audio_input_frame_size < sample_fifo_used( fifo ) )
 866                                 {
 867                                         AVCodecContext *c;
 868                                         AVPacket pkt;
 869                                         av_init_packet( &pkt );
 870
 871                                         c = &audio_st->codec;
 872
 873                                         sample_fifo_fetch( fifo, buffer, channels * audio_input_frame_size );
 874
 875                                         pkt.size = avcodec_encode_audio( c, audio_outbuf, audio_outbuf_size, buffer );
 876                                         // Write the compressed frame in the media file
 877                                         if ( c->coded_frame )
 878                                                 pkt.pts = av_rescale_q( c->coded_frame->pts, c->time_base, audio_st->time_base );
 879                                         pkt.flags |= PKT_FLAG_KEY;
 880                                         pkt.stream_index= audio_st->index;
 881                                         pkt.data= audio_outbuf;
 882
 883                                         if ( av_interleaved_write_frame( oc, &pkt ) != 0)
 884                                                 fprintf(stderr, "Error while writing audio frame\n");
 885
 886                                         audio_pts += c->frame_size;
 887                                 }
 888                                 else
 889                                 {
 890                                         break;
 891                                 }
 892                         }
 893                         else if ( video_st )
 894                         {
 895                                 if ( mlt_deque_count( queue ) )
 896                                 {
 897                                         int out_size, ret;
 898                                         AVCodecContext *c;
 899
 900                                         frame = mlt_deque_pop_front( queue );
 901                                         frame_properties = MLT_FRAME_PROPERTIES( frame );
 902
 903                                         c = &video_st->codec;
 904
 905                                         if ( mlt_properties_get_int( frame_properties, "rendered" ) )
 906                                         {
 907                                                 int i = 0;
 908                                                 int j = 0;
 909                                                 uint8_t *p;
 910                                                 uint8_t *q;
 911
 912                                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 913
 914                                                 // This will cause some fx to go awry....
 915                                                 if ( mlt_properties_get_int( properties, "transcode" ) )
 916                                                 {
 917                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_width", img_height * 4.0 / 3.0 );
 918                                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "normalised_height", img_height );
 919                                                 }
 920
 921                                                 mlt_frame_get_image( frame, &image, &img_fmt, &img_width, &img_height, 0 );
 922
 923                                                 q = image;
 924
 925                                                 for ( i = 0; i < height; i ++ )
 926                                                 {
 927                                                         p = input->data[ 0 ] + i * input->linesize[ 0 ];
 928                                                         j = width;
 929                                                         while( j -- )
 930                                                         {
 931                                                                 *p ++ = *q ++;
 932                                                                 *p ++ = *q ++;
 933                                                         }
 934                                                 }
 935
 936                                                 img_convert( ( AVPicture * )output, video_st->codec.pix_fmt, ( AVPicture * )input, PIX_FMT_YUV422, width, height );
 937                                         }
 938
 939                                         if (oc->oformat->flags & AVFMT_RAWPICTURE)
 940                                         {
 941                                                 // raw video case. The API will change slightly in the near future for that
 942                                                 AVPacket pkt;
 943                                                 av_init_packet(&pkt);
 944
 945                                                 pkt.flags |= PKT_FLAG_KEY;
 946                                                 pkt.stream_index= video_st->index;
 947                                                 pkt.data= (uint8_t *)output;
 948                                                 pkt.size= sizeof(AVPicture);
 949
 950                                                 ret = av_write_frame(oc, &pkt);
 951                                                 video_pts += c->frame_size;
 952                                         }
 953                                         else
 954                                         {
 955                                                 // Set the quality
 956                                                 output->quality = video_st->quality;
 957
 958                                                 // Encode the image
 959                                                 out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, output );
 960
 961                                                 // If zero size, it means the image was buffered
 962                                                 if (out_size != 0)
 963                                                 {
 964                                                         AVPacket pkt;
 965                                                         av_init_packet( &pkt );
 966
 967                                                         if ( c->coded_frame )
 968                                                                 pkt.pts= av_rescale_q( c->coded_frame->pts, c->time_base, video_st->time_base );
 969                                                         if(c->coded_frame->key_frame)
 970                                                                 pkt.flags |= PKT_FLAG_KEY;
 971                                                         pkt.stream_index= video_st->index;
 972                                                         pkt.data= video_outbuf;
 973                                                         pkt.size= out_size;
 974
 975                                         // write the compressed frame in the media file
 976                                                         ret = av_interleaved_write_frame(oc, &pkt);
 977                                                         video_pts += c->frame_size;
 978                                                 }
 979                                         }
 980                                         frame_count++;
 981                                         mlt_frame_close( frame );
 982                                 }
 983                                 else
 984                                 {
 985                                         break;
 986                                 }
 987                         }
 988                 }
 989
 990                 if ( real_time_output && frames % 12 == 0 )
 991                 {
 992                         long passed = time_difference( &ante );
 993                         if ( fifo != NULL )
 994                         {
 995                                 long pending = ( ( ( long )sample_fifo_used( fifo ) * 1000 ) / frequency ) * 1000;
 996                                 passed -= pending;
 997                         }
 998                         if ( passed < total_time )
 999                         {
1000                                 long total = ( total_time - passed );
1001                                 struct timespec t = { total / 1000000, ( total % 1000000 ) * 1000 };
1002                                 nanosleep( &t, NULL );
1003                         }
1004                 }
1005         }
1006
1007         // close each codec
1008         if (video_st)
1009                 close_video(oc, video_st);
1010         if (audio_st)
1011                 close_audio(oc, audio_st);
1012
1013         // Write the trailer, if any
1014         av_write_trailer(oc);
1015
1016         // Free the streams
1017         for(i = 0; i < oc->nb_streams; i++)
1018                 av_freep(&oc->streams[i]);
1019
1020         // Close the output file
1021         if (!(fmt->flags & AVFMT_NOFILE))
1022                 url_fclose(&oc->pb);
1023
1024         // Clean up input and output frames
1025         if ( output )
1026                 av_free( output->data[0] );
1027         av_free( output );
1028         av_free( input->data[0] );
1029         av_free( input );
1030         av_free( video_outbuf );
1031         av_free( buffer );
1032
1033         // Free the stream
1034         av_free(oc);
1035
1036         // Just in case we terminated on pause
1037         mlt_properties_set_int( properties, "running", 0 );
1038
1039         mlt_consumer_stopped( this );
1040
1041         return NULL;
1042 }
1043
1044 /** Close the consumer.
1045 */
1046
1047 static void consumer_close( mlt_consumer this )
1048 {
1049         // Stop the consumer
1050         mlt_consumer_stop( this );
1051
1052         // Close the parent
1053         mlt_consumer_close( this );
1054
1055         // Free the memory
1056         free( this );
1057 }