git.sesse.net Git - mlt/blob - src/modules/avformat/producer_avformat.c

   1 /*
   2  * producer_avformat.c -- avformat producer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  * Much code borrowed from ffmpeg.c: Copyright (c) 2000-2003 Fabrice Bellard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 // MLT Header files
  23 #include <framework/mlt_producer.h>
  24 #include <framework/mlt_frame.h>
  25 #include <framework/mlt_profile.h>
  26 #include <framework/mlt_log.h>
  27
  28 // ffmpeg Header files
  29 #include <avformat.h>
  30 #include <opt.h>
  31 #ifdef SWSCALE
  32 #  include <swscale.h>
  33 #endif
  34 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
  35 #  include "audioconvert.h"
  36 #endif
  37
  38 // System header files
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <pthread.h>
  42 #include <limits.h>
  43
  44 #if LIBAVUTIL_VERSION_INT < (50<<16)
  45 #define PIX_FMT_RGB32 PIX_FMT_RGBA32
  46 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
  47 #endif
  48
  49 #define POSITION_INITIAL (-2)
  50 #define POSITION_INVALID (-1)
  51
  52 #define MAX_AUDIO_STREAMS (8)
  53
  54 void avformat_lock( );
  55 void avformat_unlock( );
  56
  57 struct producer_avformat_s
  58 {
  59         struct mlt_producer_s parent;
  60         AVFormatContext *dummy_context;
  61         AVFormatContext *audio_format;
  62         AVFormatContext *video_format;
  63         AVCodecContext *audio_codec[ MAX_AUDIO_STREAMS ];
  64         AVCodecContext *video_codec;
  65         AVFrame *av_frame;
  66         ReSampleContext *audio_resample[ MAX_AUDIO_STREAMS ];
  67         mlt_position audio_expected;
  68         mlt_position video_expected;
  69         int audio_index;
  70         int video_index;
  71         double start_time;
  72         int first_pts;
  73         int last_position;
  74         int seekable;
  75         int current_position;
  76         int got_picture;
  77         int top_field_first;
  78         int16_t *audio_buffer[ MAX_AUDIO_STREAMS ];
  79         size_t audio_buffer_size[ MAX_AUDIO_STREAMS ];
  80         int16_t *decode_buffer[ MAX_AUDIO_STREAMS ];
  81         int audio_used[ MAX_AUDIO_STREAMS ];
  82         int audio_streams;
  83         int audio_max_stream;
  84         int total_channels;
  85         int max_channel;
  86         int max_frequency;
  87         unsigned int invalid_pts_counter;
  88 };
  89 typedef struct producer_avformat_s *producer_avformat;
  90
  91 // Forward references.
  92 static int producer_open( producer_avformat this, mlt_profile profile, char *file );
  93 static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index );
  94 static void producer_format_close( void *context );
  95 static void producer_close( mlt_producer parent );
  96
  97 /** Constructor for libavformat.
  98 */
  99
 100 mlt_producer producer_avformat_init( mlt_profile profile, char *file )
 101 {
 102         int skip = 0;
 103
 104         // Report information about available demuxers and codecs as YAML Tiny
 105         if ( file && strstr( file, "f-list" ) )
 106         {
 107                 fprintf( stderr, "---\nformats:\n" );
 108                 AVInputFormat *format = NULL;
 109                 while ( ( format = av_iformat_next( format ) ) )
 110                         fprintf( stderr, "  - %s\n", format->name );
 111                 fprintf( stderr, "...\n" );
 112                 skip = 1;
 113         }
 114         if ( file && strstr( file, "acodec-list" ) )
 115         {
 116                 fprintf( stderr, "---\naudio_codecs:\n" );
 117                 AVCodec *codec = NULL;
 118                 while ( ( codec = av_codec_next( codec ) ) )
 119                         if ( codec->decode && codec->type == CODEC_TYPE_AUDIO )
 120                                 fprintf( stderr, "  - %s\n", codec->name );
 121                 fprintf( stderr, "...\n" );
 122                 skip = 1;
 123         }
 124         if ( file && strstr( file, "vcodec-list" ) )
 125         {
 126                 fprintf( stderr, "---\nvideo_codecs:\n" );
 127                 AVCodec *codec = NULL;
 128                 while ( ( codec = av_codec_next( codec ) ) )
 129                         if ( codec->decode && codec->type == CODEC_TYPE_VIDEO )
 130                                 fprintf( stderr, "  - %s\n", codec->name );
 131                 fprintf( stderr, "...\n" );
 132                 skip = 1;
 133         }
 134
 135         // Check that we have a non-NULL argument
 136         if ( !skip && file )
 137         {
 138                 // Construct the producer
 139                 producer_avformat this = calloc( 1, sizeof( struct producer_avformat_s ) );
 140
 141                 // Initialise it
 142                 if ( mlt_producer_init( &this->parent, this ) == 0 )
 143                 {
 144                         mlt_producer producer = &this->parent;
 145
 146                         // Get the properties
 147                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 148
 149                         // Set the resource property (required for all producers)
 150                         mlt_properties_set( properties, "resource", file );
 151
 152                         // Register transport implementation with the producer
 153                         producer->close = (mlt_destructor) producer_close;
 154
 155                         // Register our get_frame implementation
 156                         producer->get_frame = producer_get_frame;
 157
 158                         // Open the file
 159                         if ( producer_open( this, profile, file ) != 0 )
 160                         {
 161                                 // Clean up
 162                                 mlt_producer_close( producer );
 163                                 this = NULL;
 164                         }
 165                         else
 166                         {
 167                                 // Close the file to release resources for large playlists - reopen later as needed
 168                                 producer_format_close( this->dummy_context );
 169                                 this->dummy_context = NULL;
 170                                 producer_format_close( this->audio_format );
 171                                 this->audio_format = NULL;
 172                                 producer_format_close( this->video_format );
 173                                 this->video_format = NULL;
 174
 175                                 // Default the user-selectable indices from the auto-detected indices
 176                                 mlt_properties_set_int( properties, "audio_index",  this->audio_index );
 177                                 mlt_properties_set_int( properties, "video_index",  this->video_index );
 178                         }
 179                         return producer;
 180                 }
 181         }
 182         return NULL;
 183 }
 184
 185 /** Find the default streams.
 186 */
 187
 188 static mlt_properties find_default_streams( mlt_properties meta_media, AVFormatContext *context, int *audio_index, int *video_index )
 189 {
 190         int i;
 191         char key[200];
 192
 193         mlt_properties_set_int( meta_media, "meta.media.nb_streams", context->nb_streams );
 194
 195         // Allow for multiple audio and video streams in the file and select first of each (if available)
 196         for( i = 0; i < context->nb_streams; i++ )
 197         {
 198                 // Get the codec context
 199                 AVStream *stream = context->streams[ i ];
 200                 if ( ! stream ) continue;
 201                 AVCodecContext *codec_context = stream->codec;
 202                 if ( ! codec_context ) continue;
 203                 AVCodec *codec = avcodec_find_decoder( codec_context->codec_id );
 204                 if ( ! codec ) continue;
 205
 206                 snprintf( key, sizeof(key), "meta.media.%d.stream.type", i );
 207
 208                 // Determine the type and obtain the first index of each type
 209                 switch( codec_context->codec_type )
 210                 {
 211                         case CODEC_TYPE_VIDEO:
 212                                 if ( *video_index < 0 )
 213                                         *video_index = i;
 214                                 mlt_properties_set( meta_media, key, "video" );
 215                                 snprintf( key, sizeof(key), "meta.media.%d.stream.frame_rate", i );
 216                                 mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->r_frame_rate ) );
 217 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
 218                                 snprintf( key, sizeof(key), "meta.media.%d.stream.sample_aspect_ratio", i );
 219                                 mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->sample_aspect_ratio ) );
 220 #endif
 221                                 snprintf( key, sizeof(key), "meta.media.%d.codec.frame_rate", i );
 222                                 mlt_properties_set_double( meta_media, key, (double) codec_context->time_base.den /
 223                                                                                    ( codec_context->time_base.num == 0 ? 1 : codec_context->time_base.num ) );
 224                                 snprintf( key, sizeof(key), "meta.media.%d.codec.pix_fmt", i );
 225                                 mlt_properties_set( meta_media, key, avcodec_get_pix_fmt_name( codec_context->pix_fmt ) );
 226                                 snprintf( key, sizeof(key), "meta.media.%d.codec.sample_aspect_ratio", i );
 227                                 mlt_properties_set_double( meta_media, key, av_q2d( codec_context->sample_aspect_ratio ) );
 228                                 break;
 229                         case CODEC_TYPE_AUDIO:
 230                                 if ( *audio_index < 0 )
 231                                         *audio_index = i;
 232                                 mlt_properties_set( meta_media, key, "audio" );
 233 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
 234                                 snprintf( key, sizeof(key), "meta.media.%d.codec.sample_fmt", i );
 235                                 mlt_properties_set( meta_media, key, avcodec_get_sample_fmt_name( codec_context->sample_fmt ) );
 236 #endif
 237                                 snprintf( key, sizeof(key), "meta.media.%d.codec.sample_rate", i );
 238                                 mlt_properties_set_int( meta_media, key, codec_context->sample_rate );
 239                                 snprintf( key, sizeof(key), "meta.media.%d.codec.channels", i );
 240                                 mlt_properties_set_int( meta_media, key, codec_context->channels );
 241                                 break;
 242                         default:
 243                                 break;
 244                 }
 245 //              snprintf( key, sizeof(key), "meta.media.%d.stream.time_base", i );
 246 //              mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->time_base ) );
 247                 snprintf( key, sizeof(key), "meta.media.%d.codec.name", i );
 248                 mlt_properties_set( meta_media, key, codec->name );
 249 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(55<<8)+0))
 250                 snprintf( key, sizeof(key), "meta.media.%d.codec.long_name", i );
 251                 mlt_properties_set( meta_media, key, codec->long_name );
 252 #endif
 253                 snprintf( key, sizeof(key), "meta.media.%d.codec.bit_rate", i );
 254                 mlt_properties_set_int( meta_media, key, codec_context->bit_rate );
 255 //              snprintf( key, sizeof(key), "meta.media.%d.codec.time_base", i );
 256 //              mlt_properties_set_double( meta_media, key, av_q2d( codec_context->time_base ) );
 257 //              snprintf( key, sizeof(key), "meta.media.%d.codec.profile", i );
 258 //              mlt_properties_set_int( meta_media, key, codec_context->profile );
 259 //              snprintf( key, sizeof(key), "meta.media.%d.codec.level", i );
 260 //              mlt_properties_set_int( meta_media, key, codec_context->level );
 261         }
 262
 263         return meta_media;
 264 }
 265
 266 /** Producer file destructor.
 267 */
 268
 269 static void producer_format_close( void *context )
 270 {
 271         if ( context )
 272         {
 273                 // Lock the mutex now
 274                 avformat_lock( );
 275
 276                 // Close the file
 277                 av_close_input_file( context );
 278
 279                 // Unlock the mutex now
 280                 avformat_unlock( );
 281         }
 282 }
 283
 284 /** Producer file destructor.
 285 */
 286
 287 static void producer_codec_close( void *codec )
 288 {
 289         if ( codec )
 290         {
 291                 // Lock the mutex now
 292                 avformat_lock( );
 293
 294                 // Close the file
 295                 avcodec_close( codec );
 296
 297                 // Unlock the mutex now
 298                 avformat_unlock( );
 299         }
 300 }
 301
 302 static inline int dv_is_pal( AVPacket *pkt )
 303 {
 304         return pkt->data[3] & 0x80;
 305 }
 306
 307 static int dv_is_wide( AVPacket *pkt )
 308 {
 309         int i = 80 /* block size */ *3 /* VAUX starts at block 3 */ +3 /* skip block header */;
 310
 311         for ( ; i < pkt->size; i += 5 /* packet size */ )
 312         {
 313                 if ( pkt->data[ i ] == 0x61 )
 314                 {
 315                         uint8_t x = pkt->data[ i + 2 ] & 0x7;
 316                         return ( x == 2 ) || ( x == 7 );
 317                 }
 318         }
 319         return 0;
 320 }
 321
 322 static double get_aspect_ratio( AVStream *stream, AVCodecContext *codec_context, AVPacket *pkt )
 323 {
 324         double aspect_ratio = 1.0;
 325
 326         if ( codec_context->codec_id == CODEC_ID_DVVIDEO )
 327         {
 328                 if ( pkt )
 329                 {
 330                         if ( dv_is_pal( pkt ) )
 331                         {
 332                                 aspect_ratio = dv_is_wide( pkt )
 333                                         ? 64.0/45.0 // 16:9 PAL
 334                                         : 16.0/15.0; // 4:3 PAL
 335                         }
 336                         else
 337                         {
 338                                 aspect_ratio = dv_is_wide( pkt )
 339                                         ? 32.0/27.0 // 16:9 NTSC
 340                                         : 8.0/9.0; // 4:3 NTSC
 341                         }
 342                 }
 343                 else
 344                 {
 345                         AVRational ar =
 346 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
 347                                 stream->sample_aspect_ratio;
 348 #else
 349                                 codec_context->sample_aspect_ratio;
 350 #endif
 351                         // Override FFmpeg's notion of DV aspect ratios, which are
 352                         // based upon a width of 704. Since we do not have a normaliser
 353                         // that crops (nor is cropping 720 wide ITU-R 601 video always desirable)
 354                         // we just coerce the values to facilitate a passive behaviour through
 355                         // the rescale normaliser when using equivalent producers and consumers.
 356                         // = display_aspect / (width * height)
 357                         if ( ar.num == 10 && ar.den == 11 )
 358                                 aspect_ratio = 8.0/9.0; // 4:3 NTSC
 359                         else if ( ar.num == 59 && ar.den == 54 )
 360                                 aspect_ratio = 16.0/15.0; // 4:3 PAL
 361                         else if ( ar.num == 40 && ar.den == 33 )
 362                                 aspect_ratio = 32.0/27.0; // 16:9 NTSC
 363                         else if ( ar.num == 118 && ar.den == 81 )
 364                                 aspect_ratio = 64.0/45.0; // 16:9 PAL
 365                 }
 366         }
 367         else
 368         {
 369                 AVRational codec_sar = codec_context->sample_aspect_ratio;
 370                 AVRational stream_sar =
 371 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
 372                         stream->sample_aspect_ratio;
 373 #else
 374                         { 0, 1 };
 375 #endif
 376                 if ( codec_sar.num > 0 )
 377                         aspect_ratio = av_q2d( codec_sar );
 378                 else if ( stream_sar.num > 0 )
 379                         aspect_ratio = av_q2d( stream_sar );
 380         }
 381         return aspect_ratio;
 382 }
 383
 384 /** Open the file.
 385 */
 386
 387 static int producer_open( producer_avformat this, mlt_profile profile, char *file )
 388 {
 389         // Return an error code (0 == no error)
 390         int error = 0;
 391
 392         // Context for avformat
 393         AVFormatContext *context = NULL;
 394
 395         // Get the properties
 396         mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
 397
 398         // We will treat everything with the producer fps
 399         double fps = mlt_profile_fps( profile );
 400
 401         // Lock the mutex now
 402         avformat_lock( );
 403
 404         // If "MRL", then create AVInputFormat
 405         AVInputFormat *format = NULL;
 406         AVFormatParameters *params = NULL;
 407         char *standard = NULL;
 408         char *mrl = strchr( file, ':' );
 409
 410         // AV option (0 = both, 1 = video, 2 = audio)
 411         int av = 0;
 412
 413         // Only if there is not a protocol specification that avformat can handle
 414         if ( mrl && !url_exist( file ) )
 415         {
 416                 // 'file' becomes format abbreviation
 417                 mrl[0] = 0;
 418
 419                 // Lookup the format
 420                 format = av_find_input_format( file );
 421
 422                 // Eat the format designator
 423                 file = ++mrl;
 424
 425                 if ( format )
 426                 {
 427                         // Allocate params
 428                         params = calloc( sizeof( AVFormatParameters ), 1 );
 429
 430                         // These are required by video4linux (defaults)
 431                         params->width = 640;
 432                         params->height = 480;
 433                         params->time_base= (AVRational){1,25};
 434                         // params->device = file;
 435                         params->channels = 2;
 436                         params->sample_rate = 48000;
 437                 }
 438
 439                 // XXX: this does not work anymore since avdevice
 440                 // TODO: make producer_avddevice?
 441                 // Parse out params
 442                 mrl = strchr( file, '?' );
 443                 while ( mrl )
 444                 {
 445                         mrl[0] = 0;
 446                         char *name = strdup( ++mrl );
 447                         char *value = strchr( name, ':' );
 448                         if ( value )
 449                         {
 450                                 value[0] = 0;
 451                                 value++;
 452                                 char *t = strchr( value, '&' );
 453                                 if ( t )
 454                                         t[0] = 0;
 455                                 if ( !strcmp( name, "frame_rate" ) )
 456                                         params->time_base.den = atoi( value );
 457                                 else if ( !strcmp( name, "frame_rate_base" ) )
 458                                         params->time_base.num = atoi( value );
 459                                 else if ( !strcmp( name, "sample_rate" ) )
 460                                         params->sample_rate = atoi( value );
 461                                 else if ( !strcmp( name, "channels" ) )
 462                                         params->channels = atoi( value );
 463                                 else if ( !strcmp( name, "width" ) )
 464                                         params->width = atoi( value );
 465                                 else if ( !strcmp( name, "height" ) )
 466                                         params->height = atoi( value );
 467                                 else if ( !strcmp( name, "standard" ) )
 468                                 {
 469                                         standard = strdup( value );
 470                                         params->standard = standard;
 471                                 }
 472                                 else if ( !strcmp( name, "av" ) )
 473                                         av = atoi( value );
 474                         }
 475                         free( name );
 476                         mrl = strchr( mrl, '&' );
 477                 }
 478         }
 479
 480         // Now attempt to open the file
 481         error = av_open_input_file( &context, file, format, 0, params ) < 0;
 482
 483         // Cleanup AVFormatParameters
 484         free( standard );
 485         free( params );
 486
 487         // If successful, then try to get additional info
 488         if ( !error )
 489         {
 490                 // Get the stream info
 491                 error = av_find_stream_info( context ) < 0;
 492
 493                 // Continue if no error
 494                 if ( !error )
 495                 {
 496                         // We will default to the first audio and video streams found
 497                         int audio_index = -1;
 498                         int video_index = -1;
 499
 500                         // Now set properties where we can (use default unknowns if required)
 501                         if ( context->duration != AV_NOPTS_VALUE )
 502                         {
 503                                 // This isn't going to be accurate for all formats
 504                                 mlt_position frames = ( mlt_position )( ( ( double )context->duration / ( double )AV_TIME_BASE ) * fps + 0.5 );
 505                                 mlt_properties_set_position( properties, "out", frames - 1 );
 506                                 mlt_properties_set_position( properties, "length", frames );
 507                         }
 508
 509                         // Find default audio and video streams
 510                         find_default_streams( properties, context, &audio_index, &video_index );
 511
 512                         if ( context->start_time != AV_NOPTS_VALUE )
 513                                 this->start_time = context->start_time;
 514
 515                         // Check if we're seekable (something funny about mpeg here :-/)
 516                         if ( strncmp( file, "pipe:", 5 ) &&
 517                                  strncmp( file, "http:", 5 ) &&
 518                                  strncmp( file, "udp:", 4 )  &&
 519                                  strncmp( file, "tcp:", 4 )  &&
 520                                  strncmp( file, "rtsp:", 5 ) &&
 521                                  strncmp( file, "rtp:", 4 ) )
 522                         {
 523                                 this->seekable = av_seek_frame( context, -1, this->start_time, AVSEEK_FLAG_BACKWARD ) >= 0;
 524                                 mlt_properties_set_int( properties, "seekable", this->seekable );
 525                                 producer_format_close( this->dummy_context );
 526                                 this->dummy_context = context;
 527                                 av_open_input_file( &context, file, NULL, 0, NULL );
 528                                 av_find_stream_info( context );
 529                         }
 530
 531                         // Store selected audio and video indexes on properties
 532                         this->audio_index = audio_index;
 533                         this->video_index = video_index;
 534                         this->first_pts = -1;
 535                         this->last_position = POSITION_INITIAL;
 536
 537                         // Fetch the width, height and aspect ratio
 538                         if ( video_index != -1 )
 539                         {
 540                                 AVCodecContext *codec_context = context->streams[ video_index ]->codec;
 541                                 mlt_properties_set_int( properties, "width", codec_context->width );
 542                                 mlt_properties_set_int( properties, "height", codec_context->height );
 543
 544                                 if ( codec_context->codec_id == CODEC_ID_DVVIDEO )
 545                                 {
 546                                         // Fetch the first frame of DV so we can read it directly
 547                                         AVPacket pkt;
 548                                         int ret = 0;
 549                                         while ( ret >= 0 )
 550                                         {
 551                                                 ret = av_read_frame( context, &pkt );
 552                                                 if ( ret >= 0 && pkt.stream_index == video_index && pkt.size > 0 )
 553                                                 {
 554                                                         mlt_properties_set_double( properties, "aspect_ratio",
 555                                                                 get_aspect_ratio( context->streams[ video_index ], codec_context, &pkt ) );
 556                                                         break;
 557                                                 }
 558                                         }
 559                                 }
 560                                 else
 561                                 {
 562                                         mlt_properties_set_double( properties, "aspect_ratio",
 563                                                 get_aspect_ratio( context->streams[ video_index ], codec_context, NULL ) );
 564                                 }
 565                         }
 566
 567                         // Read Metadata
 568                         if ( context->title )
 569                                 mlt_properties_set(properties, "meta.attr.title.markup", context->title );
 570                         if ( context->author )
 571                                 mlt_properties_set(properties, "meta.attr.author.markup", context->author );
 572                         if ( context->copyright )
 573                                 mlt_properties_set(properties, "meta.attr.copyright.markup", context->copyright );
 574                         if ( context->comment )
 575                                 mlt_properties_set(properties, "meta.attr.comment.markup", context->comment );
 576                         if ( context->album )
 577                                 mlt_properties_set(properties, "meta.attr.album.markup", context->album );
 578                         if ( context->year )
 579                                 mlt_properties_set_int(properties, "meta.attr.year.markup", context->year );
 580                         if ( context->track )
 581                                 mlt_properties_set_int(properties, "meta.attr.track.markup", context->track );
 582
 583                         // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later)
 584                         if ( av == 0 && audio_index != -1 && video_index != -1 )
 585                         {
 586                                 // We'll use the open one as our video_format
 587                                 avformat_unlock();
 588                                 producer_format_close( this->video_format );
 589                                 avformat_lock();
 590                                 this->video_format = context;
 591
 592                                 // And open again for our audio context
 593                                 av_open_input_file( &context, file, NULL, 0, NULL );
 594                                 av_find_stream_info( context );
 595
 596                                 // Audio context
 597                                 avformat_unlock();
 598                                 producer_format_close( this->audio_format );
 599                                 avformat_lock();
 600                                 this->audio_format = context;
 601                         }
 602                         else if ( av != 2 && video_index != -1 )
 603                         {
 604                                 // We only have a video context
 605                                 avformat_unlock();
 606                                 producer_format_close( this->video_format );
 607                                 avformat_lock();
 608                                 this->video_format = context;
 609                         }
 610                         else if ( audio_index != -1 )
 611                         {
 612                                 // We only have an audio context
 613                                 avformat_unlock();
 614                                 producer_format_close( this->audio_format );
 615                                 avformat_lock();
 616                                 this->audio_format = context;
 617                         }
 618                         else
 619                         {
 620                                 // Something has gone wrong
 621                                 error = -1;
 622                         }
 623                 }
 624         }
 625
 626         // Unlock the mutex now
 627         avformat_unlock( );
 628
 629         return error;
 630 }
 631
 632 /** Convert a frame position to a time code.
 633 */
 634
 635 static double producer_time_of_frame( mlt_producer this, mlt_position position )
 636 {
 637         return ( double )position / mlt_producer_get_fps( this );
 638 }
 639
 640                 // Collect information about all audio streams
 641
 642 static void get_audio_streams_info( producer_avformat this )
 643 {
 644         // Fetch the audio format context
 645         AVFormatContext *context = this->audio_format;
 646         int i;
 647
 648         for ( i = 0;
 649                   i < context->nb_streams;
 650                   i++ )
 651         {
 652                 if ( context->streams[i]->codec->codec_type == CODEC_TYPE_AUDIO )
 653                 {
 654                         AVCodecContext *codec_context = context->streams[i]->codec;
 655                         AVCodec *codec = avcodec_find_decoder( codec_context->codec_id );
 656
 657                         // If we don't have a codec and we can't initialise it, we can't do much more...
 658                         avformat_lock( );
 659                         if ( codec && avcodec_open( codec_context, codec ) >= 0 )
 660                         {
 661                                 this->audio_streams++;
 662                                 this->audio_max_stream = i;
 663                                 this->total_channels += codec_context->channels;
 664                                 if ( codec_context->channels > this->max_channel )
 665                                         this->max_channel = codec_context->channels;
 666                                 if ( codec_context->sample_rate > this->max_frequency )
 667                                         this->max_frequency = codec_context->sample_rate;
 668                                 avcodec_close( codec_context );
 669                         }
 670                         avformat_unlock( );
 671                 }
 672         }
 673         mlt_log_verbose( NULL, "[producer avformat] audio: total_streams %d max_stream %d total_channels %d max_channels %d\n",
 674                 this->audio_streams, this->audio_max_stream, this->total_channels, this->max_channel );
 675 }
 676
 677 static inline void convert_image( AVFrame *frame, uint8_t *buffer, int pix_fmt, mlt_image_format *format, int width, int height )
 678 {
 679 #ifdef SWSCALE
 680         if ( pix_fmt == PIX_FMT_RGB32 )
 681         {
 682                 *format = mlt_image_rgb24a;
 683                 struct SwsContext *context = sws_getContext( width, height, pix_fmt,
 684                         width, height, PIX_FMT_RGBA, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 685                 AVPicture output;
 686                 avpicture_fill( &output, buffer, PIX_FMT_RGBA, width, height );
 687                 sws_scale( context, frame->data, frame->linesize, 0, height,
 688                         output.data, output.linesize);
 689                 sws_freeContext( context );
 690         }
 691         else if ( *format == mlt_image_yuv420p )
 692         {
 693                 struct SwsContext *context = sws_getContext( width, height, pix_fmt,
 694                         width, height, PIX_FMT_YUV420P, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 695                 AVPicture output;
 696                 output.data[0] = buffer;
 697                 output.data[1] = buffer + width * height;
 698                 output.data[2] = buffer + ( 3 * width * height ) / 2;
 699                 output.linesize[0] = width;
 700                 output.linesize[1] = width >> 1;
 701                 output.linesize[2] = width >> 1;
 702                 sws_scale( context, frame->data, frame->linesize, 0, height,
 703                         output.data, output.linesize);
 704                 sws_freeContext( context );
 705         }
 706         else if ( *format == mlt_image_rgb24 )
 707         {
 708                 struct SwsContext *context = sws_getContext( width, height, pix_fmt,
 709                         width, height, PIX_FMT_RGB24, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 710                 AVPicture output;
 711                 avpicture_fill( &output, buffer, PIX_FMT_RGB24, width, height );
 712                 sws_scale( context, frame->data, frame->linesize, 0, height,
 713                         output.data, output.linesize);
 714                 sws_freeContext( context );
 715         }
 716         else if ( *format == mlt_image_rgb24a || *format == mlt_image_opengl )
 717         {
 718                 struct SwsContext *context = sws_getContext( width, height, pix_fmt,
 719                         width, height, PIX_FMT_RGBA, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 720                 AVPicture output;
 721                 avpicture_fill( &output, buffer, PIX_FMT_RGBA, width, height );
 722                 sws_scale( context, frame->data, frame->linesize, 0, height,
 723                         output.data, output.linesize);
 724                 sws_freeContext( context );
 725         }
 726         else
 727         {
 728                 struct SwsContext *context = sws_getContext( width, height, pix_fmt,
 729                         width, height, PIX_FMT_YUYV422, SWS_FAST_BILINEAR, NULL, NULL, NULL);
 730                 AVPicture output;
 731                 avpicture_fill( &output, buffer, PIX_FMT_YUYV422, width, height );
 732                 sws_scale( context, frame->data, frame->linesize, 0, height,
 733                         output.data, output.linesize);
 734                 sws_freeContext( context );
 735         }
 736 #else
 737         if ( *format == mlt_image_yuv420p )
 738         {
 739                 AVPicture pict;
 740                 pict.data[0] = buffer;
 741                 pict.data[1] = buffer + width * height;
 742                 pict.data[2] = buffer + ( 3 * width * height ) / 2;
 743                 pict.linesize[0] = width;
 744                 pict.linesize[1] = width >> 1;
 745                 pict.linesize[2] = width >> 1;
 746                 img_convert( &pict, PIX_FMT_YUV420P, (AVPicture *)frame, pix_fmt, width, height );
 747         }
 748         else if ( *format == mlt_image_rgb24 )
 749         {
 750                 AVPicture output;
 751                 avpicture_fill( &output, buffer, PIX_FMT_RGB24, width, height );
 752                 img_convert( &output, PIX_FMT_RGB24, (AVPicture *)frame, pix_fmt, width, height );
 753         }
 754         else if ( format == mlt_image_rgb24a || format == mlt_image_opengl )
 755         {
 756                 AVPicture output;
 757                 avpicture_fill( &output, buffer, PIX_FMT_RGB32, width, height );
 758                 img_convert( &output, PIX_FMT_RGB32, (AVPicture *)frame, pix_fmt, width, height );
 759         }
 760         else
 761         {
 762                 AVPicture output;
 763                 avpicture_fill( &output, buffer, PIX_FMT_YUYV422, width, height );
 764                 img_convert( &output, PIX_FMT_YUYV422, (AVPicture *)frame, pix_fmt, width, height );
 765         }
 766 #endif
 767 }
 768
 769 /** Allocate the image buffer and set it on the frame.
 770 */
 771
 772 static int allocate_buffer( mlt_properties frame_properties, AVCodecContext *codec_context, uint8_t **buffer, mlt_image_format *format, int *width, int *height )
 773 {
 774         int size = 0;
 775
 776         if ( codec_context->width == 0 || codec_context->height == 0 )
 777                 return size;
 778
 779         *width = codec_context->width;
 780         *height = codec_context->height;
 781         mlt_properties_set_int( frame_properties, "width", *width );
 782         mlt_properties_set_int( frame_properties, "height", *height );
 783
 784         if ( codec_context->pix_fmt == PIX_FMT_RGB32 )
 785                 size = *width * ( *height + 1 ) * 4;
 786         else switch ( *format )
 787         {
 788                 case mlt_image_yuv420p:
 789                         size = *width * 3 * ( *height + 1 ) / 2;
 790                         break;
 791                 case mlt_image_rgb24:
 792                         size = *width * ( *height + 1 ) * 3;
 793                         break;
 794                 case mlt_image_rgb24a:
 795                 case mlt_image_opengl:
 796                         size = *width * ( *height + 1 ) * 4;
 797                         break;
 798                 default:
 799                         *format = mlt_image_yuv422;
 800                         size = *width * ( *height + 1 ) * 2;
 801                         break;
 802         }
 803
 804         // Construct the output image
 805         *buffer = mlt_pool_alloc( size );
 806         if ( *buffer )
 807                 mlt_properties_set_data( frame_properties, "image", *buffer, size, mlt_pool_release, NULL );
 808         else
 809                 size = 0;
 810
 811         return size;
 812 }
 813
 814 /** Get an image from a frame.
 815 */
 816
 817 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 818 {
 819         // Get the producer
 820         producer_avformat this = mlt_frame_pop_service( frame );
 821         mlt_producer producer = &this->parent;
 822
 823         // Get the properties from the frame
 824         mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
 825
 826         // Obtain the frame number of this frame
 827         mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" );
 828
 829         // Get the producer properties
 830         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 831
 832         avformat_lock();
 833
 834         // Fetch the video format context
 835         AVFormatContext *context = this->video_format;
 836
 837         // Get the video stream
 838         AVStream *stream = context->streams[ this->video_index ];
 839
 840         // Get codec context
 841         AVCodecContext *codec_context = stream->codec;
 842
 843         // Packet
 844         AVPacket pkt;
 845
 846         // Special case pause handling flag
 847         int paused = 0;
 848
 849         // Special case ffwd handling
 850         int ignore = 0;
 851
 852         // We may want to use the source fps if available
 853         double source_fps = mlt_properties_get_double( properties, "source_fps" );
 854         double fps = mlt_producer_get_fps( producer );
 855
 856         // This is the physical frame position in the source
 857         int req_position = ( int )( position / fps * source_fps + 0.5 );
 858
 859         // Determines if we have to decode all frames in a sequence
 860         // Temporary hack to improve intra frame only
 861         int must_decode = strcmp( codec_context->codec->name, "dnxhd" ) &&
 862                                   strcmp( codec_context->codec->name, "dvvideo" ) &&
 863                                   strcmp( codec_context->codec->name, "huffyuv" ) &&
 864                                   strcmp( codec_context->codec->name, "mjpeg" ) &&
 865                                   strcmp( codec_context->codec->name, "rawvideo" );
 866
 867         int last_position = this->last_position;
 868
 869         // Turn on usage of new seek API and PTS for seeking
 870         int use_new_seek = codec_context->codec_id == CODEC_ID_H264 && !strcmp( context->iformat->name, "mpegts" );
 871         if ( mlt_properties_get( properties, "new_seek" ) )
 872                 use_new_seek = mlt_properties_get_int( properties, "new_seek" );
 873
 874         // Seek if necessary
 875         if ( position != this->video_expected || last_position < 0 )
 876         {
 877                 if ( this->av_frame && position + 1 == this->video_expected )
 878                 {
 879                         // We're paused - use last image
 880                         paused = 1;
 881                 }
 882                 else if ( !this->seekable && position > this->video_expected && ( position - this->video_expected ) < 250 )
 883                 {
 884                         // Fast forward - seeking is inefficient for small distances - just ignore following frames
 885                         ignore = ( int )( ( position - this->video_expected ) / fps * source_fps );
 886                         codec_context->skip_loop_filter = AVDISCARD_NONREF;
 887                 }
 888                 else if ( this->seekable && ( position < this->video_expected || position - this->video_expected >= 12 || last_position < 0 ) )
 889                 {
 890                         if ( use_new_seek && last_position == POSITION_INITIAL )
 891                         {
 892                                 // find first key frame
 893                                 int ret = 0;
 894                                 int toscan = 100;
 895
 896                                 while ( ret >= 0 && toscan-- > 0 )
 897                                 {
 898                                         ret = av_read_frame( context, &pkt );
 899                                         if ( ret >= 0 && ( pkt.flags & PKT_FLAG_KEY ) && pkt.stream_index == this->video_index )
 900                                         {
 901                                                 mlt_log_verbose( MLT_PRODUCER_SERVICE(producer), "first_pts %lld dts %lld pts_dts_delta %d\n", pkt.pts, pkt.dts, (int)(pkt.pts - pkt.dts) );
 902                                                 this->first_pts = pkt.pts;
 903                                                 toscan = 0;
 904                                         }
 905                                         av_free_packet( &pkt );
 906                                 }
 907                                 // Rewind
 908                                 av_seek_frame( context, -1, 0, AVSEEK_FLAG_BACKWARD );
 909                         }
 910
 911                         // Calculate the timestamp for the requested frame
 912                         int64_t timestamp;
 913                         if ( use_new_seek )
 914                         {
 915                                 timestamp = ( req_position - 0.1 / source_fps ) /
 916                                         ( av_q2d( stream->time_base ) * source_fps );
 917                                 mlt_log_verbose( MLT_PRODUCER_SERVICE(producer), "pos %d pts %lld ", req_position, timestamp );
 918                                 if ( this->first_pts > 0 )
 919                                         timestamp += this->first_pts;
 920                                 else if ( context->start_time != AV_NOPTS_VALUE )
 921                                         timestamp += context->start_time;
 922                         }
 923                         else
 924                         {
 925                                 timestamp = ( int64_t )( ( double )req_position / source_fps * AV_TIME_BASE + 0.5 );
 926                                 if ( context->start_time != AV_NOPTS_VALUE )
 927                                         timestamp += context->start_time;
 928                         }
 929                         if ( must_decode )
 930                                 timestamp -= AV_TIME_BASE;
 931                         if ( timestamp < 0 )
 932                                 timestamp = 0;
 933                         mlt_log_debug( MLT_PRODUCER_SERVICE(producer), "seeking timestamp %lld position %d expected %d last_pos %d\n",
 934                                 timestamp, position, this->video_expected, last_position );
 935
 936                         // Seek to the timestamp
 937                         if ( use_new_seek )
 938                         {
 939                                 codec_context->skip_loop_filter = AVDISCARD_NONREF;
 940                                 av_seek_frame( context, this->video_index, timestamp, AVSEEK_FLAG_BACKWARD );
 941                         }
 942                         else
 943                         {
 944                                 av_seek_frame( context, -1, timestamp, AVSEEK_FLAG_BACKWARD );
 945                         }
 946
 947                         // Remove the cached info relating to the previous position
 948                         this->current_position = POSITION_INVALID;
 949                         this->last_position = POSITION_INVALID;
 950                         av_freep( &this->av_frame );
 951
 952                         if ( use_new_seek )
 953                         {
 954                                 // flush any pictures still in decode buffer
 955                                 avcodec_flush_buffers( codec_context );
 956                         }
 957                 }
 958         }
 959
 960         // Duplicate the last image if necessary (see comment on rawvideo below)
 961         if ( this->av_frame && this->got_picture && this->seekable
 962                  && ( paused
 963                           || this->current_position == req_position
 964                           || ( !use_new_seek && this->current_position > req_position ) ) )
 965         {
 966                 // Duplicate it
 967                 if ( allocate_buffer( frame_properties, codec_context, buffer, format, width, height ) )
 968                         convert_image( this->av_frame, *buffer, codec_context->pix_fmt, format, *width, *height );
 969                 else
 970                         mlt_frame_get_image( frame, buffer, format, width, height, writable );
 971         }
 972         else
 973         {
 974                 int ret = 0;
 975                 int int_position = 0;
 976                 int decode_errors = 0;
 977                 int got_picture = 0;
 978
 979                 av_init_packet( &pkt );
 980
 981                 // Construct an AVFrame for YUV422 conversion
 982                 if ( !this->av_frame )
 983                         this->av_frame = avcodec_alloc_frame( );
 984
 985                 while( ret >= 0 && !got_picture )
 986                 {
 987                         // Read a packet
 988                         ret = av_read_frame( context, &pkt );
 989
 990                         // We only deal with video from the selected video_index
 991                         if ( ret >= 0 && pkt.stream_index == this->video_index && pkt.size > 0 )
 992                         {
 993                                 // Determine time code of the packet
 994                                 if ( use_new_seek )
 995                                 {
 996                                         int64_t pts = pkt.pts;
 997                                         if ( this->first_pts > 0 )
 998                                                 pts -= this->first_pts;
 999                                         else if ( context->start_time != AV_NOPTS_VALUE )
1000                                                 pts -= context->start_time;
1001                                         int_position = ( int )( av_q2d( stream->time_base ) * pts * source_fps + 0.1 );
1002                                         if ( pkt.pts == AV_NOPTS_VALUE )
1003                                         {
1004                                                 this->invalid_pts_counter++;
1005                                                 if ( this->invalid_pts_counter > 20 )
1006                                                 {
1007                                                         mlt_log_panic( MLT_PRODUCER_SERVICE(producer), "\ainvalid PTS; DISABLING NEW_SEEK!\n" );
1008                                                         mlt_properties_set_int( properties, "new_seek", 0 );
1009                                                         int_position = req_position;
1010                                                         use_new_seek = 0;
1011                                                 }
1012                                         }
1013                                         else
1014                                         {
1015                                                 this->invalid_pts_counter = 0;
1016                                         }
1017                                         mlt_log_debug( MLT_PRODUCER_SERVICE(producer), "pkt.pts %llu req_pos %d cur_pos %d pkt_pos %d",
1018                                                 pkt.pts, req_position, this->current_position, int_position );
1019                                 }
1020                                 else
1021                                 {
1022                                         if ( pkt.dts != AV_NOPTS_VALUE )
1023                                         {
1024                                                 int_position = ( int )( av_q2d( stream->time_base ) * pkt.dts * source_fps + 0.5 );
1025                                                 if ( context->start_time != AV_NOPTS_VALUE )
1026                                                         int_position -= ( int )( context->start_time * source_fps / AV_TIME_BASE + 0.5 );
1027                                                 last_position = this->last_position;
1028                                                 if ( int_position == last_position )
1029                                                         int_position = last_position + 1;
1030                                         }
1031                                         else
1032                                         {
1033                                                 int_position = req_position;
1034                                         }
1035                                         mlt_log_debug( MLT_PRODUCER_SERVICE(producer), "pkt.dts %llu req_pos %d cur_pos %d pkt_pos %d",
1036                                                 pkt.dts, req_position, this->current_position, int_position );
1037                                         // Make a dumb assumption on streams that contain wild timestamps
1038                                         if ( abs( req_position - int_position ) > 999 )
1039                                         {
1040                                                 int_position = req_position;
1041                                                 mlt_log_debug( MLT_PRODUCER_SERVICE(producer), " WILD TIMESTAMP!" );
1042                                         }
1043                                 }
1044                                 this->last_position = int_position;
1045
1046                                 // Decode the image
1047                                 if ( must_decode || int_position >= req_position )
1048                                 {
1049                                         codec_context->reordered_opaque = pkt.pts;
1050                                         if ( int_position >= req_position )
1051                                                 codec_context->skip_loop_filter = AVDISCARD_NONE;
1052 #if (LIBAVCODEC_VERSION_INT >= ((52<<16)+(26<<8)+0))
1053                                         ret = avcodec_decode_video2( codec_context, this->av_frame, &got_picture, &pkt );
1054 #else
1055                                         ret = avcodec_decode_video( codec_context, this->av_frame, &got_picture, pkt.data, pkt.size );
1056 #endif
1057                                         // Note: decode may fail at the beginning of MPEGfile (B-frames referencing before first I-frame), so allow a few errors.
1058                                         if ( ret < 0 )
1059                                         {
1060                                                 if ( ++decode_errors <= 10 )
1061                                                         ret = 0;
1062                                         }
1063                                         else
1064                                         {
1065                                                 decode_errors = 0;
1066                                         }
1067                                 }
1068
1069                                 if ( got_picture )
1070                                 {
1071                                         if ( use_new_seek )
1072                                         {
1073                                                 // Determine time code of the packet
1074                                                 int64_t pts = this->av_frame->reordered_opaque;
1075                                                 if ( this->first_pts > 0 )
1076                                                         pts -= this->first_pts;
1077                                                 else if ( context->start_time != AV_NOPTS_VALUE )
1078                                                         pts -= context->start_time;
1079                                                 int_position = ( int )( av_q2d( stream->time_base) * pts * source_fps + 0.1 );
1080                                                 mlt_log_verbose( MLT_PRODUCER_SERVICE(producer), "got frame %d, key %d\n", int_position, this->av_frame->key_frame );
1081                                         }
1082                                         // Handle ignore
1083                                         if ( int_position < req_position )
1084                                         {
1085                                                 ignore = 0;
1086                                                 got_picture = 0;
1087                                         }
1088                                         else if ( int_position >= req_position )
1089                                         {
1090                                                 ignore = 0;
1091                                                 codec_context->skip_loop_filter = AVDISCARD_NONE;
1092                                         }
1093                                         else if ( ignore -- )
1094                                         {
1095                                                 got_picture = 0;
1096                                         }
1097                                 }
1098                                 mlt_log_debug( MLT_PRODUCER_SERVICE(producer), " got_pic %d key %d\n", got_picture, pkt.flags & PKT_FLAG_KEY );
1099                                 av_free_packet( &pkt );
1100                         }
1101                         else if ( ret >= 0 )
1102                         {
1103                                 av_free_packet( &pkt );
1104                         }
1105
1106                         // Now handle the picture if we have one
1107                         if ( got_picture )
1108                         {
1109                                 if ( allocate_buffer( frame_properties, codec_context, buffer, format, width, height ) )
1110                                 {
1111                                         convert_image( this->av_frame, *buffer, codec_context->pix_fmt, format, *width, *height );
1112                                         if ( !mlt_properties_get( properties, "force_progressive" ) )
1113                                                 mlt_properties_set_int( frame_properties, "progressive", !this->av_frame->interlaced_frame );
1114                                         this->top_field_first |= this->av_frame->top_field_first;
1115                                         this->current_position = int_position;
1116                                         this->got_picture = 1;
1117                                 }
1118                                 else
1119                                 {
1120                                         got_picture = 0;
1121                                 }
1122                         }
1123                 }
1124                 if ( !got_picture )
1125                         mlt_frame_get_image( frame, buffer, format, width, height, writable );
1126         }
1127
1128         // Very untidy - for rawvideo, the packet contains the frame, hence the free packet
1129         // above will break the pause behaviour - so we wipe the frame now
1130         if ( !strcmp( codec_context->codec->name, "rawvideo" ) )
1131                 av_freep( &this->av_frame );
1132
1133         avformat_unlock();
1134
1135         // Set the field order property for this frame
1136         mlt_properties_set_int( frame_properties, "top_field_first", this->top_field_first );
1137
1138         // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
1139         this->video_expected = position + 1;
1140
1141         return 0;
1142 }
1143
1144 /** Process properties as AVOptions and apply to AV context obj
1145 */
1146
1147 static void apply_properties( void *obj, mlt_properties properties, int flags )
1148 {
1149         int i;
1150         int count = mlt_properties_count( properties );
1151         for ( i = 0; i < count; i++ )
1152         {
1153                 const char *opt_name = mlt_properties_get_name( properties, i );
1154                 const AVOption *opt = av_find_opt( obj, opt_name, NULL, flags, flags );
1155                 if ( opt )
1156 #if LIBAVCODEC_VERSION_INT >= ((52<<16)+(7<<8)+0)
1157                         av_set_string3( obj, opt_name, mlt_properties_get( properties, opt_name), 0, NULL );
1158 #elif LIBAVCODEC_VERSION_INT >= ((51<<16)+(59<<8)+0)
1159                         av_set_string2( obj, opt_name, mlt_properties_get( properties, opt_name), 0 );
1160 #else
1161                         av_set_string( obj, opt_name, mlt_properties_get( properties, opt_name) );
1162 #endif
1163         }
1164 }
1165
1166 /** Initialize the video codec context.
1167  */
1168
1169 static int video_codec_init( producer_avformat this, int index, mlt_properties properties )
1170 {
1171         // Initialise the codec if necessary
1172         if ( !this->video_codec )
1173         {
1174                 // Get the video stream
1175                 AVStream *stream = this->video_format->streams[ index ];
1176
1177                 // Get codec context
1178                 AVCodecContext *codec_context = stream->codec;
1179
1180                 // Find the codec
1181                 AVCodec *codec = avcodec_find_decoder( codec_context->codec_id );
1182
1183                 // Initialise multi-threading
1184                 int thread_count = mlt_properties_get_int( properties, "threads" );
1185                 if ( thread_count == 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
1186                         thread_count = atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
1187                 if ( thread_count > 1 )
1188                 {
1189                         avcodec_thread_init( codec_context, thread_count );
1190                         codec_context->thread_count = thread_count;
1191                 }
1192
1193                 // If we don't have a codec and we can't initialise it, we can't do much more...
1194                 avformat_lock( );
1195                 if ( codec && avcodec_open( codec_context, codec ) >= 0 )
1196                 {
1197                         // Now store the codec with its destructor
1198                         producer_codec_close( this->video_codec );
1199                         this->video_codec = codec_context;
1200                 }
1201                 else
1202                 {
1203                         // Remember that we can't use this later
1204                         this->video_index = -1;
1205                 }
1206                 avformat_unlock( );
1207
1208                 // Process properties as AVOptions
1209                 apply_properties( codec_context, properties, AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM );
1210
1211                 // Reset some image properties
1212                 mlt_properties_set_int( properties, "width", this->video_codec->width );
1213                 mlt_properties_set_int( properties, "height", this->video_codec->height );
1214                 mlt_properties_set_double( properties, "aspect_ratio", get_aspect_ratio( stream, this->video_codec, NULL ) );
1215
1216                 // Determine the fps first from the codec
1217                 double source_fps = (double) this->video_codec->time_base.den /
1218                                                                    ( this->video_codec->time_base.num == 0 ? 1 : this->video_codec->time_base.num );
1219
1220                 // If the muxer reports a frame rate different than the codec
1221                 double muxer_fps = av_q2d( stream->r_frame_rate );
1222                 if ( source_fps != muxer_fps )
1223                         // Choose the lesser - the wrong tends to be off by some multiple of 10
1224                         source_fps = muxer_fps < source_fps ? muxer_fps : source_fps;
1225
1226                 // We'll use fps if it's available
1227                 if ( source_fps > 0 )
1228                         mlt_properties_set_double( properties, "source_fps", source_fps );
1229                 else
1230                         mlt_properties_set_double( properties, "source_fps", mlt_producer_get_fps( &this->parent ) );
1231         }
1232         return this->video_codec && this->video_index > -1;
1233 }
1234
1235 /** Set up video handling.
1236 */
1237
1238 static void producer_set_up_video( producer_avformat this, mlt_frame frame )
1239 {
1240         // Get the producer
1241         mlt_producer producer = &this->parent;
1242
1243         // Get the properties
1244         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
1245
1246         // Fetch the video format context
1247         AVFormatContext *context = this->video_format;
1248
1249         // Get the video_index
1250         int index = mlt_properties_get_int( properties, "video_index" );
1251
1252         // Reopen the file if necessary
1253         if ( !context && index > -1 )
1254         {
1255                 mlt_events_block( properties, producer );
1256                 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(producer) ),
1257                         mlt_properties_get( properties, "resource" ) );
1258                 context = this->video_format;
1259                 producer_format_close( this->dummy_context );
1260                 this->dummy_context = NULL;
1261                 mlt_events_unblock( properties, producer );
1262                 if ( this->audio_format )
1263                         get_audio_streams_info( this );
1264
1265                 // Process properties as AVOptions
1266                 apply_properties( context, properties, AV_OPT_FLAG_DECODING_PARAM );
1267         }
1268
1269         // Exception handling for video_index
1270         if ( context && index >= (int) context->nb_streams )
1271         {
1272                 // Get the last video stream
1273                 for ( index = context->nb_streams - 1;
1274                           index >= 0 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_VIDEO;
1275                           index-- );
1276                 mlt_properties_set_int( properties, "video_index", index );
1277         }
1278         if ( context && index > -1 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_VIDEO )
1279         {
1280                 // Invalidate the video stream
1281                 index = -1;
1282                 mlt_properties_set_int( properties, "video_index", index );
1283         }
1284
1285         // Update the video properties if the index changed
1286         if ( index != this->video_index )
1287         {
1288                 // Reset the video properties if the index changed
1289                 this->video_index = index;
1290                 producer_codec_close( this->video_codec );
1291                 this->video_codec = NULL;
1292         }
1293
1294         // Get the frame properties
1295         mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
1296
1297         // Get the codec
1298         if ( context && index > -1 && video_codec_init( this, index, properties ) )
1299         {
1300                 // Set the frame properties
1301                 double force_aspect_ratio = mlt_properties_get_double( properties, "force_aspect_ratio" );
1302                 double aspect_ratio = ( force_aspect_ratio > 0.0 ) ?
1303                         force_aspect_ratio : mlt_properties_get_double( properties, "aspect_ratio" );
1304
1305                 // Set the width and height
1306                 mlt_properties_set_int( frame_properties, "width", this->video_codec->width );
1307                 mlt_properties_set_int( frame_properties, "height", this->video_codec->height );
1308                 mlt_properties_set_int( frame_properties, "real_width", this->video_codec->width );
1309                 mlt_properties_set_int( frame_properties, "real_height", this->video_codec->height );
1310                 mlt_properties_set_double( frame_properties, "aspect_ratio", aspect_ratio );
1311                 if ( mlt_properties_get( properties, "force_progressive" ) )
1312                         mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( properties, "force_progressive" ) );
1313
1314                 // Add our image operation
1315                 mlt_frame_push_service( frame, this );
1316                 mlt_frame_push_get_image( frame, producer_get_image );
1317         }
1318         else
1319         {
1320                 // If something failed, use test card image
1321                 mlt_properties_set_int( frame_properties, "test_image", 1 );
1322         }
1323 }
1324
1325 static int seek_audio( producer_avformat this, mlt_position position, double timecode, int *ignore )
1326 {
1327         int paused = 0;
1328
1329         // Fetch the audio_format
1330         AVFormatContext *context = this->audio_format;
1331
1332         // Seek if necessary
1333         if ( position != this->audio_expected )
1334         {
1335                 if ( position + 1 == this->audio_expected )
1336                 {
1337                         // We're paused - silence required
1338                         paused = 1;
1339                 }
1340                 else if ( !this->seekable && position > this->audio_expected && ( position - this->audio_expected ) < 250 )
1341                 {
1342                         // Fast forward - seeking is inefficient for small distances - just ignore following frames
1343                         *ignore = position - this->audio_expected;
1344                 }
1345                 else if ( position < this->audio_expected || position - this->audio_expected >= 12 )
1346                 {
1347                         int64_t timestamp = ( int64_t )( timecode * AV_TIME_BASE + 0.5 );
1348                         if ( context->start_time != AV_NOPTS_VALUE )
1349                                 timestamp += context->start_time;
1350                         if ( timestamp < 0 )
1351                                 timestamp = 0;
1352
1353                         // Set to the real timecode
1354                         if ( av_seek_frame( context, -1, timestamp, AVSEEK_FLAG_BACKWARD ) != 0 )
1355                                 paused = 1;
1356
1357                         // Clear the usage in the audio buffer
1358                         int i = MAX_AUDIO_STREAMS + 1;
1359                         while ( --i )
1360                                 this->audio_used[i - 1] = 0;
1361                 }
1362         }
1363         return paused;
1364 }
1365
1366 static int decode_audio( producer_avformat this, int *ignore, AVPacket *pkt, int samples, double timecode, double source_fps )
1367 {
1368         // Fetch the audio_format
1369         AVFormatContext *context = this->audio_format;
1370
1371         // Get the current stream index
1372         int index = pkt->stream_index;
1373
1374         // Get codec context
1375         AVCodecContext *codec_context = this->audio_codec[ index ];
1376
1377         // Obtain the resample context if it exists (not always needed)
1378         ReSampleContext *resample = this->audio_resample[ index ];
1379
1380         // Obtain the audio buffers
1381         int16_t *audio_buffer = this->audio_buffer[ index ];
1382         int16_t *decode_buffer = this->decode_buffer[ index ];
1383
1384         int audio_used = this->audio_used[ index ];
1385         int channels = codec_context->channels;
1386         uint8_t *ptr = pkt->data;
1387         int len = pkt->size;
1388         int ret = 0;
1389
1390         while ( ptr && ret >= 0 && len > 0 )
1391         {
1392                 int data_size = sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE;
1393
1394                 // Decode the audio
1395 #if (LIBAVCODEC_VERSION_INT >= ((52<<16)+(26<<8)+0))
1396                 ret = avcodec_decode_audio3( codec_context, decode_buffer, &data_size, pkt );
1397 #elif (LIBAVCODEC_VERSION_INT >= ((51<<16)+(29<<8)+0))
1398                 ret = avcodec_decode_audio2( codec_context, decode_buffer, &data_size, ptr, len );
1399 #else
1400                 ret = avcodec_decode_audio( codec_context, decode_buffer, &data_size, ptr, len );
1401 #endif
1402                 if ( ret < 0 )
1403                 {
1404                         ret = 0;
1405                         break;
1406                 }
1407
1408                 len -= ret;
1409                 ptr += ret;
1410
1411                 // If decoded successfully
1412                 if ( data_size > 0 )
1413                 {
1414                         // Resize audio buffer to prevent overflow
1415                         if ( audio_used * channels + data_size > this->audio_buffer_size[ index ] )
1416                         {
1417                                 mlt_pool_release( this->audio_buffer[ index ] );
1418                                 this->audio_buffer_size[ index ] = audio_used * channels * sizeof(int16_t) + data_size * 2;
1419                                 audio_buffer = this->audio_buffer[ index ] = mlt_pool_alloc( this->audio_buffer_size[ index ] );
1420                         }
1421                         if ( resample )
1422                         {
1423                                 // Copy to audio buffer while resampling
1424                                 int16_t *source = decode_buffer;
1425                                 int16_t *dest = &audio_buffer[ audio_used * channels ];
1426                                 int convert_samples = data_size / channels / ( av_get_bits_per_sample_format( codec_context->sample_fmt ) / 8 );
1427                                 audio_used += audio_resample( resample, dest, source, convert_samples );
1428                         }
1429                         else
1430                         {
1431                                 // Straight copy to audio buffer
1432                                 memcpy( &audio_buffer[ audio_used * channels ], decode_buffer, data_size );
1433                                 audio_used += data_size / channels / ( av_get_bits_per_sample_format( codec_context->sample_fmt ) / 8 );
1434                         }
1435
1436                         // Handle ignore
1437                         while ( *ignore && audio_used > samples )
1438                         {
1439                                 *ignore -= 1;
1440                                 audio_used -= samples;
1441                                 memmove( audio_buffer, &audio_buffer[ samples * channels ], audio_used * sizeof( int16_t ) );
1442                         }
1443                 }
1444         }
1445
1446         // If we're behind, ignore this packet
1447         if ( pkt->pts >= 0 )
1448         {
1449                 double current_pts = av_q2d( context->streams[ index ]->time_base ) * pkt->pts;
1450                 int req_position = ( int )( timecode * source_fps + 0.5 );
1451                 int int_position = ( int )( current_pts * source_fps + 0.5 );
1452
1453                 if ( context->start_time != AV_NOPTS_VALUE )
1454                         int_position -= ( int )( source_fps * context->start_time / AV_TIME_BASE + 0.5 );
1455                 if ( this->seekable && *ignore == 0 && int_position < req_position )
1456                         *ignore = 1;
1457         }
1458
1459         this->audio_used[ index ] = audio_used;
1460
1461         return ret;
1462 }
1463
1464 /** Get the audio from a frame.
1465 */
1466
1467 static int producer_get_audio( mlt_frame frame, void **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
1468 {
1469         // Get the producer
1470         producer_avformat this = mlt_frame_pop_audio( frame );
1471
1472         // Obtain the frame number of this frame
1473         mlt_position position = mlt_properties_get_position( MLT_FRAME_PROPERTIES( frame ), "avformat_position" );
1474
1475         // Calculate the real time code
1476         double real_timecode = producer_time_of_frame( &this->parent, position );
1477
1478         // Get the source fps
1479         double source_fps = mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( &this->parent ), "source_fps" );
1480
1481         // Number of frames to ignore (for ffwd)
1482         int ignore = 0;
1483
1484         // Flag for paused (silence)
1485         int paused = seek_audio( this, position, real_timecode, &ignore );
1486
1487         // Fetch the audio_format
1488         AVFormatContext *context = this->audio_format;
1489
1490         // Determine the tracks to use
1491         int index = this->audio_index;
1492         int index_max = this->audio_index + 1;
1493         if ( this->audio_index == INT_MAX )
1494         {
1495                 index = 0;
1496                 index_max = context->nb_streams;
1497                 *channels = this->total_channels;
1498                 *frequency = this->max_frequency;
1499         }
1500
1501         // Initialize the resamplers and buffers
1502         for ( ; index < index_max; index++ )
1503         {
1504                 // Get codec context
1505                 AVCodecContext *codec_context = this->audio_codec[ index ];
1506
1507                 if ( codec_context && !this->audio_buffer[ index ] )
1508                 {
1509                         // Check for resample and create if necessary
1510                         if ( codec_context->channels <= 2 )
1511                         {
1512                                 // Create the resampler
1513 #if (LIBAVCODEC_VERSION_INT >= ((52<<16)+(15<<8)+0))
1514                                 this->audio_resample[ index ] = av_audio_resample_init(
1515                                         this->audio_index == INT_MAX ? codec_context->channels : *channels,
1516                                         codec_context->channels, *frequency, codec_context->sample_rate,
1517                                         SAMPLE_FMT_S16, codec_context->sample_fmt, 16, 10, 0, 0.8 );
1518 #else
1519                                 this->audio_resample[ index ] = audio_resample_init(
1520                                         this->audio_index == INT_MAX ? codec_context->channels : *channels,
1521                                         codec_context->channels, *frequency, codec_context->sample_rate );
1522 #endif
1523                         }
1524                         else
1525                         {
1526                                 codec_context->request_channels = this->audio_index == INT_MAX ? codec_context->channels : *channels;
1527                         }
1528
1529                         // Check for audio buffer and create if necessary
1530                         this->audio_buffer[ index ] = mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
1531                         this->audio_buffer_size[ index ] = AVCODEC_MAX_AUDIO_FRAME_SIZE;
1532
1533                         // Check for decoder buffer and create if necessary
1534                         this->decode_buffer[ index ] = av_malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
1535                 }
1536         }
1537
1538         // Get the audio if required
1539         if ( !paused )
1540         {
1541                 int ret = 0;
1542                 int got_audio = 0;
1543                 AVPacket pkt;
1544
1545                 av_init_packet( &pkt );
1546
1547                 while ( ret >= 0 && !got_audio )
1548                 {
1549                         // Check if the buffer already contains the samples required
1550                         if ( this->audio_index != INT_MAX && this->audio_used[ this->audio_index ] >= *samples && ignore == 0 )
1551                         {
1552                                 got_audio = 1;
1553                                 break;
1554                         }
1555
1556                         // Read a packet
1557                         ret = av_read_frame( context, &pkt );
1558
1559                         // We only deal with audio from the selected audio index
1560                         if ( ret >= 0 && pkt.data && pkt.size > 0 && ( pkt.stream_index == this->audio_index ||
1561                                  ( this->audio_index == INT_MAX && context->streams[ pkt.stream_index ]->codec->codec_type == CODEC_TYPE_AUDIO ) ) )
1562                                 ret = decode_audio( this, &ignore, &pkt, *samples, real_timecode, source_fps );
1563                         av_free_packet( &pkt );
1564
1565                         if ( this->audio_index == INT_MAX && ret >= 0 )
1566                         {
1567                                 // Determine if there is enough audio for all streams
1568                                 got_audio = 1;
1569                                 for ( index = 0; index < context->nb_streams; index++ )
1570                                 {
1571                                         if ( this->audio_codec[ index ] && this->audio_used[ index ] < *samples )
1572                                                 got_audio = 0;
1573                                 }
1574                         }
1575                 }
1576
1577                 // Allocate and set the frame's audio buffer
1578                 int size = *samples * *channels * sizeof(int16_t);
1579                 *buffer = mlt_pool_alloc( size );
1580                 *format = mlt_audio_s16;
1581                 mlt_frame_set_audio( frame, *buffer, *format, size, mlt_pool_release );
1582
1583                 // Interleave tracks if audio_index=all
1584                 if ( this->audio_index == INT_MAX )
1585                 {
1586                         int16_t *dest = *buffer;
1587                         int i;
1588                         for ( i = 0; i < *samples; i++ )
1589                         {
1590                                 for ( index = 0; index < index_max; index++ )
1591                                 if ( this->audio_codec[ index ] )
1592                                 {
1593                                         int current_channels = this->audio_codec[ index ]->channels;
1594                                         int16_t *src = this->audio_buffer[ index ] + i * current_channels;
1595                                         memcpy( dest, src, current_channels * sizeof(int16_t) );
1596                                         dest += current_channels;
1597                                 }
1598                         }
1599                         for ( index = 0; index < index_max; index++ )
1600                         if ( this->audio_codec[ index ] )
1601                         {
1602                                 int current_channels = this->audio_codec[ index ]->channels;
1603                                 int16_t *src = this->audio_buffer[ index ] + *samples * current_channels;
1604                                 this->audio_used[index] -= *samples;
1605                                 memmove( this->audio_buffer[ index ], src, this->audio_used[ index ] * current_channels * sizeof(int16_t) );
1606                         }
1607                 }
1608                 // Copy a single track to the output buffer
1609                 else
1610                 {
1611                         index = this->audio_index;
1612
1613                         // Now handle the audio if we have enough
1614                         if ( this->audio_used[ index ] >= *samples )
1615                         {
1616                                 int16_t *src = this->audio_buffer[ index ];
1617                                 memcpy( *buffer, src, *samples * *channels * sizeof(int16_t) );
1618                                 this->audio_used[ index ] -= *samples;
1619                                 memmove( src, &src[ *samples * *channels ], this->audio_used[ index ] * *channels * sizeof(int16_t) );
1620                         }
1621                         else
1622                         {
1623                                 // Otherwise fill with silence
1624                                 memset( *buffer, 0, *samples * *channels * sizeof(int16_t) );
1625                         }
1626                         if ( !this->audio_resample[ index ] )
1627                         {
1628                                 // TODO: uncomment and remove following line when full multi-channel support is ready
1629                                 // *channels = codec_context->channels;
1630                                 *frequency = this->audio_codec[ index ]->sample_rate;
1631                         }
1632                 }
1633         }
1634         else
1635         {
1636                 // Get silence and don't touch the context
1637                 mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
1638         }
1639
1640         // Regardless of speed (other than paused), we expect to get the next frame
1641         if ( !paused )
1642                 this->audio_expected = position + 1;
1643
1644         return 0;
1645 }
1646
1647 /** Initialize the audio codec context.
1648 */
1649
1650 static int audio_codec_init( producer_avformat this, int index, mlt_properties properties )
1651 {
1652         // Initialise the codec if necessary
1653         if ( !this->audio_codec[ index ] )
1654         {
1655                 // Get codec context
1656                 AVCodecContext *codec_context = this->audio_format->streams[index]->codec;
1657
1658                 // Find the codec
1659                 AVCodec *codec = avcodec_find_decoder( codec_context->codec_id );
1660
1661                 // If we don't have a codec and we can't initialise it, we can't do much more...
1662                 avformat_lock( );
1663                 if ( codec && avcodec_open( codec_context, codec ) >= 0 )
1664                 {
1665                         // Now store the codec with its destructor
1666                         avformat_unlock();
1667                         producer_codec_close( this->audio_codec[index] );
1668                         this->audio_codec[ index ] = codec_context;
1669                 }
1670                 else
1671                 {
1672                         // Remember that we can't use this later
1673                         this->audio_index = -1;
1674                         avformat_unlock( );
1675                 }
1676
1677                 // Process properties as AVOptions
1678                 apply_properties( codec_context, properties, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM );
1679         }
1680         return this->audio_codec[ index ] && this->audio_index > -1;
1681 }
1682
1683 /** Set up audio handling.
1684 */
1685
1686 static void producer_set_up_audio( producer_avformat this, mlt_frame frame )
1687 {
1688         // Get the producer
1689         mlt_producer producer = &this->parent;
1690
1691         // Get the properties
1692         mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
1693
1694         // Fetch the audio format context
1695         AVFormatContext *context = this->audio_format;
1696
1697         mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
1698
1699         // Get the audio_index
1700         int index = mlt_properties_get_int( properties, "audio_index" );
1701
1702         // Handle all audio tracks
1703         if ( mlt_properties_get( properties, "audio_index" ) &&
1704                  !strcmp( mlt_properties_get( properties, "audio_index" ), "all" ) )
1705                 index = INT_MAX;
1706
1707         // Reopen the file if necessary
1708         if ( !context && index > -1 )
1709         {
1710                 mlt_events_block( properties, producer );
1711                 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(producer) ),
1712                         mlt_properties_get( properties, "resource" ) );
1713                 context = this->audio_format;
1714                 producer_format_close( this->dummy_context );
1715                 this->dummy_context = NULL;
1716                 mlt_events_unblock( properties, producer );
1717                 get_audio_streams_info( this );
1718         }
1719
1720         // Exception handling for audio_index
1721         if ( context && index >= (int) context->nb_streams && index < INT_MAX )
1722         {
1723                 for ( index = context->nb_streams - 1;
1724                           index >= 0 && context->streams[ index ]->codec->codec_type != CODEC_TYPE_AUDIO;
1725                           index-- );
1726                 mlt_properties_set_int( properties, "audio_index", index );
1727         }
1728         if ( context && index > -1 && index < INT_MAX &&
1729                  context->streams[ index ]->codec->codec_type != CODEC_TYPE_AUDIO )
1730         {
1731                 index = -1;
1732                 mlt_properties_set_int( properties, "audio_index", index );
1733         }
1734
1735         // Update the audio properties if the index changed
1736         if ( index > -1 && index != this->audio_index )
1737         {
1738                 producer_codec_close( this->audio_codec[ this->audio_index ] );
1739                 this->audio_codec[ this->audio_index ] = NULL;
1740         }
1741         this->audio_index = index;
1742
1743         // Get the codec(s)
1744         if ( context && index == INT_MAX )
1745         {
1746                 mlt_properties_set_int( frame_properties, "frequency", this->max_frequency );
1747                 mlt_properties_set_int( frame_properties, "channels", this->total_channels );
1748                 for ( index = 0; index < context->nb_streams; index++ )
1749                 {
1750                         if ( context->streams[ index ]->codec->codec_type == CODEC_TYPE_AUDIO )
1751                                 audio_codec_init( this, index, properties );
1752                 }
1753         }
1754         else if ( context && index > -1 && audio_codec_init( this, index, properties ) )
1755         {
1756                 // Set the frame properties
1757                 if ( index < INT_MAX )
1758                 {
1759                         mlt_properties_set_int( frame_properties, "frequency", this->audio_codec[ index ]->sample_rate );
1760                         mlt_properties_set_int( frame_properties, "channels", this->audio_codec[ index ]->channels );
1761                 }
1762         }
1763         if ( context && index > -1 )
1764         {
1765                 // Add our audio operation
1766                 mlt_frame_push_audio( frame, this );
1767                 mlt_frame_push_audio( frame, producer_get_audio );
1768         }
1769 }
1770
1771 /** Our get frame implementation.
1772 */
1773
1774 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
1775 {
1776         // Access the private data
1777         producer_avformat this = producer->child;
1778
1779         // Create an empty frame
1780         *frame = mlt_frame_init( MLT_PRODUCER_SERVICE( producer ) );
1781
1782         // Update timecode on the frame we're creating
1783         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
1784
1785         // Set the position of this producer
1786         mlt_properties_set_position( MLT_FRAME_PROPERTIES( *frame ), "avformat_position", mlt_producer_frame( producer ) );
1787
1788         // Set up the video
1789         producer_set_up_video( this, *frame );
1790
1791         // Set up the audio
1792         producer_set_up_audio( this, *frame );
1793
1794         // Calculate the next timecode
1795         mlt_producer_prepare_next( producer );
1796
1797         return 0;
1798 }
1799
1800 static void producer_close( mlt_producer parent )
1801 {
1802         // Obtain this
1803         producer_avformat this = parent->child;
1804
1805         // Close the file
1806         av_free( this->av_frame );
1807         int i;
1808         for ( i = 0; i < MAX_AUDIO_STREAMS; i++ )
1809         {
1810                 if ( this->audio_resample[i] )
1811                         audio_resample_close( this->audio_resample[i] );
1812                 mlt_pool_release( this->audio_buffer[i] );
1813                 av_free( this->decode_buffer[i] );
1814                 producer_codec_close( this->audio_codec[i] );
1815         }
1816         producer_codec_close( this->video_codec );
1817         producer_format_close( this->dummy_context );
1818         producer_format_close( this->audio_format );
1819         producer_format_close( this->video_format );
1820
1821         // Close the parent
1822         parent->close = NULL;
1823         mlt_producer_close( parent );
1824
1825         // Free the memory
1826         free( this );
1827 }