2 * producer_avformat.c -- avformat producer
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "producer_avformat.h"
25 #include <framework/mlt_frame.h>
27 // ffmpeg Header files
28 #include <ffmpeg/avformat.h>
30 // System header files
36 // Forward references.
37 static int producer_open( mlt_producer this, char *file );
38 static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index );
40 // A static flag used to determine if avformat has been initialised
41 static int avformat_initialised = 0;
42 static pthread_mutex_t avformat_mutex;
45 void *av_malloc( unsigned int size )
47 return mlt_pool_alloc( size );
50 void *av_realloc( void *ptr, unsigned int size )
52 return mlt_pool_realloc( ptr, size );
55 void av_free( void *ptr )
57 return mlt_pool_release( ptr );
61 /** Constructor for libavformat.
64 mlt_producer producer_avformat_init( char *file )
66 mlt_producer this = NULL;
68 // Check that we have a non-NULL argument
71 // Construct the producer
72 this = calloc( 1, sizeof( struct mlt_producer_s ) );
75 if ( mlt_producer_init( this, NULL ) == 0 )
78 mlt_properties properties = mlt_producer_properties( this );
80 // Set the resource property (required for all producers)
81 mlt_properties_set( properties, "resource", file );
83 // TEST: audio sync tweaking
84 mlt_properties_set_double( properties, "discrepancy", 1 );
86 // Register our get_frame implementation
87 this->get_frame = producer_get_frame;
89 // Initialise avformat if necessary
90 if ( avformat_initialised == 0 )
92 avformat_initialised = 1;
93 pthread_mutex_init( &avformat_mutex, NULL );
98 if ( producer_open( this, file ) != 0 )
101 mlt_producer_close( this );
110 /** Find the default streams.
113 static void find_default_streams( AVFormatContext *context, int *audio_index, int *video_index )
117 // Allow for multiple audio and video streams in the file and select first of each (if available)
118 for( i = 0; i < context->nb_streams; i++ )
120 // Get the codec context
121 AVCodecContext *codec_context = &context->streams[ i ]->codec;
123 // Determine the type and obtain the first index of each type
124 switch( codec_context->codec_type )
126 case CODEC_TYPE_VIDEO:
127 if ( *video_index < 0 )
130 case CODEC_TYPE_AUDIO:
131 if ( *audio_index < 0 )
140 /** Producer file destructor.
143 static void producer_file_close( void *context )
145 if ( context != NULL )
147 // Lock the mutex now
148 pthread_mutex_lock( &avformat_mutex );
151 av_close_input_file( context );
153 // Unlock the mutex now
154 pthread_mutex_unlock( &avformat_mutex );
158 /** Producer file destructor.
161 static void producer_codec_close( void *codec )
165 // Lock the mutex now
166 pthread_mutex_lock( &avformat_mutex );
169 avcodec_close( codec );
171 // Unlock the mutex now
172 pthread_mutex_unlock( &avformat_mutex );
179 static int producer_open( mlt_producer this, char *file )
181 // Return an error code (0 == no error)
184 // Context for avformat
185 AVFormatContext *context = NULL;
187 // Get the properties
188 mlt_properties properties = mlt_producer_properties( this );
190 // We will treat everything with the producer fps
191 double fps = mlt_properties_get_double( properties, "fps" );
193 // Lock the mutex now
194 pthread_mutex_lock( &avformat_mutex );
196 // If "MRL", then create AVInputFormat
197 AVInputFormat *format = NULL;
198 AVFormatParameters *params = NULL;
199 char *standard = NULL;
200 char *mrl = strchr( file, ':' );
202 // Only if there is not a protocol specification that avformat can handle
203 if ( mrl && !url_exist( file ) )
205 // 'file' becomes format abbreviation
209 format = av_find_input_format( file );
211 // Eat the format designator
217 params = calloc( sizeof( AVFormatParameters ), 1 );
219 // These are required by video4linux (defaults)
221 params->height = 480;
222 params->frame_rate = 25;
223 params->frame_rate_base = 1;
224 params->device = file;
225 params->channels = 2;
226 params->sample_rate = 48000;
230 mrl = strchr( file, '?' );
234 char *name = strdup( ++mrl );
235 char *value = strchr( name, ':' );
240 char *t = strchr( value, '&' );
243 if ( !strcmp( name, "frame_rate" ) )
244 params->frame_rate = atoi( value );
245 else if ( !strcmp( name, "frame_rate_base" ) )
246 params->frame_rate_base = atoi( value );
247 else if ( !strcmp( name, "sample_rate" ) )
248 params->sample_rate = atoi( value );
249 else if ( !strcmp( name, "channels" ) )
250 params->channels = atoi( value );
251 else if ( !strcmp( name, "width" ) )
252 params->width = atoi( value );
253 else if ( !strcmp( name, "height" ) )
254 params->height = atoi( value );
255 else if ( !strcmp( name, "standard" ) )
257 standard = strdup( value );
258 params->standard = standard;
262 mrl = strchr( mrl, '&' );
266 // Now attempt to open the file
267 error = av_open_input_file( &context, file, format, 0, params );
270 // Cleanup AVFormatParameters
274 // If successful, then try to get additional info
277 // Get the stream info
278 error = av_find_stream_info( context ) < 0;
280 // Continue if no error
283 // We will default to the first audio and video streams found
284 int audio_index = -1;
285 int video_index = -1;
287 // Now set properties where we can (use default unknowns if required)
288 if ( context->duration != AV_NOPTS_VALUE )
290 // This isn't going to be accurate for all formats
291 mlt_position frames = ( mlt_position )( ( ( double )context->duration / ( double )AV_TIME_BASE ) * fps );
292 mlt_properties_set_position( properties, "out", frames - 2 );
293 mlt_properties_set_position( properties, "length", frames - 1 );
296 // Find default audio and video streams
297 find_default_streams( context, &audio_index, &video_index );
299 // Store selected audio and video indexes on properties
300 mlt_properties_set_int( properties, "audio_index", audio_index );
301 mlt_properties_set_int( properties, "video_index", video_index );
303 // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later)
304 if ( audio_index != -1 && video_index != -1 )
306 // We'll use the open one as our video_context
307 mlt_properties_set_data( properties, "video_context", context, 0, producer_file_close, NULL );
309 // And open again for our audio context
310 av_open_input_file( &context, file, NULL, 0, NULL );
311 av_find_stream_info( context );
314 mlt_properties_set_data( properties, "audio_context", context, 0, producer_file_close, NULL );
316 else if ( video_index != -1 )
318 // We only have a video context
319 mlt_properties_set_data( properties, "video_context", context, 0, producer_file_close, NULL );
321 else if ( audio_index != -1 )
323 // We only have an audio context
324 mlt_properties_set_data( properties, "audio_context", context, 0, producer_file_close, NULL );
328 // Something has gone wrong
334 // Unlock the mutex now
335 pthread_mutex_unlock( &avformat_mutex );
340 /** Convert a frame position to a time code.
343 static double producer_time_of_frame( mlt_producer this, mlt_position position )
345 // Get the properties
346 mlt_properties properties = mlt_producer_properties( this );
349 double fps = mlt_properties_get_double( properties, "fps" );
352 return ( double )position / fps;
355 /** Get an image from a frame.
358 static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
360 // Get the properties from the frame
361 mlt_properties frame_properties = mlt_frame_properties( frame );
363 // Obtain the frame number of this frame
364 mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" );
367 mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL );
369 // Get the producer properties
370 mlt_properties properties = mlt_producer_properties( this );
372 // Fetch the video_context
373 AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL );
375 // Get the video_index
376 int index = mlt_properties_get_int( properties, "video_index" );
378 // Obtain the expected frame numer
379 mlt_position expected = mlt_properties_get_position( properties, "video_expected" );
381 // Calculate the real time code
382 double real_timecode = producer_time_of_frame( this, position );
384 // Get the video stream
385 AVStream *stream = context->streams[ index ];
388 AVCodecContext *codec_context = &stream->codec;
393 // Get the conversion frame
394 AVPicture *output = mlt_properties_get_data( properties, "video_output_frame", NULL );
396 // Special case pause handling flag
399 // Special case ffwd handling
402 // Current time calcs
403 double current_time = mlt_properties_get_double( properties, "current_time" );
405 // We may want to use the source fps if available
406 double source_fps = mlt_properties_get_double( properties, "source_fps" );
408 // Set the result arguments that we know here (only *buffer is now required)
409 *format = mlt_image_yuv422;
410 *width = codec_context->width;
411 *height = codec_context->height;
413 // Set this on the frame properties
414 mlt_properties_set_int( frame_properties, "width", *width );
415 mlt_properties_set_int( frame_properties, "height", *height );
417 // Lock the mutex now
418 pthread_mutex_lock( &avformat_mutex );
420 // Construct an AVFrame for YUV422 conversion
421 if ( output == NULL )
423 int size = avpicture_get_size( PIX_FMT_YUV422, *width, *height );
425 uint8_t *buf = mlt_pool_alloc( size );
426 output = mlt_pool_alloc( sizeof( AVPicture ) );
427 //memset( output, 0, sizeof( AVPicture ) );
428 avpicture_fill( output, buf, PIX_FMT_YUV422, *width, *height );
429 mlt_properties_set_data( properties, "video_output_frame", output, 0, ( mlt_destructor )mlt_pool_release, NULL );
430 mlt_properties_set_data( properties, "video_output_buffer", buf, 0, ( mlt_destructor )mlt_pool_release, NULL );
434 if ( position != expected )
436 if ( position + 1 == expected )
438 // We're paused - use last image
441 else if ( position > expected && ( position - expected ) < 250 )
443 // Fast forward - seeking is inefficient for small distances - just ignore following frames
444 ignore = position - expected;
448 // Set to the real timecode
449 av_seek_frame( context, -1, real_timecode * 1000000.0 );
451 // Remove the cached info relating to the previous position
452 mlt_properties_set_double( properties, "current_time", real_timecode );
453 mlt_properties_set_data( properties, "current_image", NULL, 0, NULL, NULL );
457 // Duplicate the last image if necessary
458 if ( mlt_properties_get_data( properties, "current_image", NULL ) != NULL &&
459 ( paused || mlt_properties_get_double( properties, "current_time" ) >= real_timecode ) )
461 // Get current image and size
463 uint8_t *image = mlt_properties_get_data( properties, "current_image", &size );
466 *buffer = mlt_pool_alloc( size );
467 memcpy( *buffer, image, size );
469 // Set this on the frame properties
470 mlt_properties_set_data( frame_properties, "image", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
478 memset( &pkt, 0, sizeof( pkt ) );
479 memset( &frame, 0, sizeof( frame ) );
481 while( ret >= 0 && !got_picture )
484 ret = av_read_frame( context, &pkt );
486 // We only deal with video from the selected video_index
487 if ( ret >= 0 && pkt.stream_index == index && pkt.size > 0 )
490 ret = avcodec_decode_video( codec_context, &frame, &got_picture, pkt.data, pkt.size );
494 if ( pkt.pts != AV_NOPTS_VALUE && pkt.pts != 0 )
496 current_time = ( double )pkt.pts / 1000000.0;
499 current_time = real_timecode;
502 if ( current_time < real_timecode )
507 else if ( current_time >= real_timecode )
509 //current_time = real_timecode;
512 else if ( ignore -- )
519 // We're finished with this packet regardless
520 av_free_packet( &pkt );
523 // Now handle the picture if we have one
526 // Get current image and size
528 uint8_t *image = mlt_properties_get_data( properties, "current_image", &size );
530 if ( image == NULL || size != *width * *height * 2 )
532 size = *width * ( *height + 1 ) * 2;
533 image = mlt_pool_alloc( size );
534 mlt_properties_set_data( properties, "current_image", image, size, ( mlt_destructor )mlt_pool_release, NULL );
537 *buffer = mlt_pool_alloc( size );
539 // EXPERIMENTAL IMAGE NORMALISATIONS
540 if ( codec_context->pix_fmt == PIX_FMT_YUV420P )
543 register int half = *width >> 1;
544 register uint8_t *Y = ( ( AVPicture * )&frame )->data[ 0 ];
545 register uint8_t *U = ( ( AVPicture * )&frame )->data[ 1 ];
546 register uint8_t *V = ( ( AVPicture * )&frame )->data[ 2 ];
547 register uint8_t *d = *buffer;
548 register uint8_t *y, *u, *v;
565 Y += ( ( AVPicture * )&frame )->linesize[ 0 ];
578 Y += ( ( AVPicture * )&frame )->linesize[ 0 ];
579 U += ( ( AVPicture * )&frame )->linesize[ 1 ];
580 V += ( ( AVPicture * )&frame )->linesize[ 2 ];
585 img_convert( output, PIX_FMT_YUV422, (AVPicture *)&frame, codec_context->pix_fmt, *width, *height );
586 memcpy( *buffer, output->data[ 0 ], size );
589 memcpy( image, *buffer, size );
590 mlt_properties_set_data( frame_properties, "image", *buffer, size, ( mlt_destructor )mlt_pool_release, NULL );
592 if ( current_time == 0 && source_fps != 0 )
594 double fps = mlt_properties_get_double( properties, "fps" );
595 current_time = ceil( source_fps * ( double )position / fps ) * ( 1 / source_fps );
596 mlt_properties_set_double( properties, "current_time", current_time );
600 mlt_properties_set_double( properties, "current_time", current_time );
605 // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
606 mlt_properties_set_position( properties, "video_expected", position + 1 );
608 // Unlock the mutex now
609 pthread_mutex_unlock( &avformat_mutex );
614 /** Set up video handling.
617 static void producer_set_up_video( mlt_producer this, mlt_frame frame )
619 // Get the properties
620 mlt_properties properties = mlt_producer_properties( this );
622 // Fetch the video_context
623 AVFormatContext *context = mlt_properties_get_data( properties, "video_context", NULL );
625 // Get the video_index
626 int index = mlt_properties_get_int( properties, "video_index" );
628 // Get the frame properties
629 mlt_properties frame_properties = mlt_frame_properties( frame );
631 // Lock the mutex now
632 pthread_mutex_lock( &avformat_mutex );
634 if ( context != NULL && index != -1 )
636 // Get the video stream
637 AVStream *stream = context->streams[ index ];
640 AVCodecContext *codec_context = &stream->codec;
643 AVCodec *codec = mlt_properties_get_data( properties, "video_codec", NULL );
645 // Initialise the codec if necessary
649 codec = avcodec_find_decoder( codec_context->codec_id );
651 // If we don't have a codec and we can't initialise it, we can't do much more...
652 if ( codec != NULL && avcodec_open( codec_context, codec ) >= 0 )
654 // Now store the codec with its destructor
655 mlt_properties_set_data( properties, "video_codec", codec_context, 0, producer_codec_close, NULL );
659 // Remember that we can't use this later
660 mlt_properties_set_int( properties, "video_index", -1 );
664 // No codec, no show...
667 double aspect_ratio = 1;
668 double source_fps = 0;
671 if ( codec_context->sample_aspect_ratio.num > 0 )
672 aspect_ratio = av_q2d( codec_context->sample_aspect_ratio );
674 mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
675 //fprintf( stderr, "AVFORMAT: sample aspect %f %dx%d\n", av_q2d( codec_context->sample_aspect_ratio ), codec_context->width, codec_context->height );
678 source_fps = ( double )codec_context->frame_rate / ( codec_context->frame_rate_base == 0 ? 1 : codec_context->frame_rate_base );
680 // We'll use fps if it's available
681 if ( source_fps > 0 && source_fps < 30 )
682 mlt_properties_set_double( properties, "source_fps", source_fps );
684 // Set the width and height
685 mlt_properties_set_int( frame_properties, "width", codec_context->width );
686 mlt_properties_set_int( frame_properties, "height", codec_context->height );
688 mlt_frame_push_get_image( frame, producer_get_image );
689 mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL );
693 mlt_properties_set_int( frame_properties, "test_image", 1 );
698 mlt_properties_set_int( frame_properties, "test_image", 1 );
701 // Unlock the mutex now
702 pthread_mutex_unlock( &avformat_mutex );
705 /** Get the audio from a frame.
708 static int producer_get_audio( mlt_frame frame, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
710 // Get the properties from the frame
711 mlt_properties frame_properties = mlt_frame_properties( frame );
713 // Obtain the frame number of this frame
714 mlt_position position = mlt_properties_get_position( frame_properties, "avformat_position" );
717 mlt_producer this = mlt_properties_get_data( frame_properties, "avformat_producer", NULL );
719 // Get the producer properties
720 mlt_properties properties = mlt_producer_properties( this );
722 // Fetch the audio_context
723 AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL );
725 // Get the audio_index
726 int index = mlt_properties_get_int( properties, "audio_index" );
728 // Obtain the expected frame numer
729 mlt_position expected = mlt_properties_get_position( properties, "audio_expected" );
731 // Obtain the resample context if it exists (not always needed)
732 ReSampleContext *resample = mlt_properties_get_data( properties, "audio_resample", NULL );
734 // Obtain the audio buffer
735 int16_t *audio_buffer = mlt_properties_get_data( properties, "audio_buffer", NULL );
737 // Get amount of audio used
738 int audio_used = mlt_properties_get_int( properties, "audio_used" );
740 // Calculate the real time code
741 double real_timecode = producer_time_of_frame( this, position );
743 // Get the audio stream
744 AVStream *stream = context->streams[ index ];
747 AVCodecContext *codec_context = &stream->codec;
752 // Number of frames to ignore (for ffwd)
755 // Flag for paused (silence)
759 // Lock the mutex now
760 pthread_mutex_lock( &avformat_mutex );
762 // Check for resample and create if necessary
763 if ( resample == NULL )
765 // Create the resampler
766 resample = audio_resample_init( *channels, codec_context->channels, *frequency, codec_context->sample_rate );
768 // And store it on properties
769 mlt_properties_set_data( properties, "audio_resample", resample, 0, ( mlt_destructor )audio_resample_close, NULL );
772 // Check for audio buffer and create if necessary
773 if ( audio_buffer == NULL )
775 // Allocate the audio buffer
776 audio_buffer = mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE * sizeof( int16_t ) );
778 // And store it on properties for reuse
779 mlt_properties_set_data( properties, "audio_buffer", audio_buffer, 0, ( mlt_destructor )mlt_pool_release, NULL );
783 if ( position != expected )
785 if ( position + 1 == expected )
787 // We're paused - silence required
790 else if ( position > expected && ( position - expected ) < 250 )
792 // Fast forward - seeking is inefficient for small distances - just ignore following frames
793 ignore = position - expected;
797 // Set to the real timecode
798 av_seek_frame( context, -1, real_timecode * 1000000.0 );
800 // Clear the usage in the audio buffer
807 // Get the audio if required
812 int16_t *temp = mlt_pool_alloc( sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE );
814 memset( &pkt, 0, sizeof( pkt ) );
816 while( ret >= 0 && !got_audio )
818 // Check if the buffer already contains the samples required
819 if ( audio_used >= *samples && ignore == 0 )
826 ret = av_read_frame( context, &pkt );
829 uint8_t *ptr = pkt.data;
832 // We only deal with video from the selected video_index
833 while ( ptr != NULL && ret >= 0 && pkt.stream_index == index && len > 0 )
836 ret = avcodec_decode_audio( codec_context, temp, &data_size, ptr, len );
849 int size_out = audio_resample( resample, &audio_buffer[ audio_used * *channels ], temp, data_size / ( codec_context->channels * sizeof( int16_t ) ) );
851 audio_used += size_out;
854 while ( ignore && audio_used > *samples )
857 audio_used -= *samples;
858 memmove( audio_buffer, &audio_buffer[ *samples * *channels ], audio_used * sizeof( int16_t ) );
862 // If we're behind, ignore this packet
863 float current_pts = (float)pkt.pts / 1000000.0;
864 double discrepancy = mlt_properties_get_double( properties, "discrepancy" );
865 if ( current_pts != 0 && real_timecode != 0 )
867 if ( discrepancy != 1 )
868 discrepancy = ( discrepancy + ( real_timecode / current_pts ) ) / 2;
870 discrepancy = real_timecode / current_pts;
871 if ( discrepancy > 0.9 && discrepancy < 1.1 )
874 discrepancy = floor( discrepancy + 0.5 );
876 if ( discrepancy == 0 )
879 mlt_properties_set_double( properties, "discrepancy", discrepancy );
882 if ( !ignore && discrepancy * current_pts <= ( real_timecode - 0.02 ) )
886 // We're finished with this packet regardless
887 av_free_packet( &pkt );
890 *buffer = mlt_pool_alloc( *samples * *channels * sizeof( int16_t ) );
891 mlt_properties_set_data( frame_properties, "audio", *buffer, 0, ( mlt_destructor )mlt_pool_release, NULL );
893 // Now handle the audio if we have enough
894 if ( audio_used >= *samples )
896 memcpy( *buffer, audio_buffer, *samples * *channels * sizeof( int16_t ) );
897 audio_used -= *samples;
898 memmove( audio_buffer, &audio_buffer[ *samples * *channels ], audio_used * *channels * sizeof( int16_t ) );
902 memset( *buffer, 0, *samples * *channels * sizeof( int16_t ) );
905 // Store the number of audio samples still available
906 mlt_properties_set_int( properties, "audio_used", audio_used );
908 // Release the temporary audio
909 mlt_pool_release( temp );
913 // Get silence and don't touch the context
914 frame->get_audio = NULL;
915 mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
918 // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
919 mlt_properties_set_position( properties, "audio_expected", position + 1 );
921 // Unlock the mutex now
922 pthread_mutex_unlock( &avformat_mutex );
927 /** Set up audio handling.
930 static void producer_set_up_audio( mlt_producer this, mlt_frame frame )
932 // Get the properties
933 mlt_properties properties = mlt_producer_properties( this );
935 // Fetch the audio_context
936 AVFormatContext *context = mlt_properties_get_data( properties, "audio_context", NULL );
938 // Get the audio_index
939 int index = mlt_properties_get_int( properties, "audio_index" );
941 // Lock the mutex now
942 pthread_mutex_lock( &avformat_mutex );
944 // Deal with audio context
945 if ( context != NULL && index != -1 )
947 // Get the frame properties
948 mlt_properties frame_properties = mlt_frame_properties( frame );
950 // Get the audio stream
951 AVStream *stream = context->streams[ index ];
954 AVCodecContext *codec_context = &stream->codec;
957 AVCodec *codec = mlt_properties_get_data( properties, "audio_codec", NULL );
959 // Initialise the codec if necessary
963 codec = avcodec_find_decoder( codec_context->codec_id );
965 // If we don't have a codec and we can't initialise it, we can't do much more...
966 if ( codec != NULL && avcodec_open( codec_context, codec ) >= 0 )
968 // Now store the codec with its destructor
969 mlt_properties_set_data( properties, "audio_codec", codec_context, 0, producer_codec_close, NULL );
974 // Remember that we can't use this later
975 mlt_properties_set_int( properties, "audio_index", -1 );
979 // No codec, no show...
982 frame->get_audio = producer_get_audio;
983 mlt_properties_set_data( frame_properties, "avformat_producer", this, 0, NULL, NULL );
987 // Unlock the mutex now
988 pthread_mutex_unlock( &avformat_mutex );
991 /** Our get frame implementation.
994 static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int index )
996 // Create an empty frame
997 *frame = mlt_frame_init( );
999 // Update timecode on the frame we're creating
1000 mlt_frame_set_position( *frame, mlt_producer_position( this ) );
1002 // Set the position of this producer
1003 mlt_properties_set_position( mlt_frame_properties( *frame ), "avformat_position", mlt_producer_get_in( this ) + mlt_producer_position( this ) );
1006 producer_set_up_video( this, *frame );
1009 producer_set_up_audio( this, *frame );
1011 // Set the aspect_ratio
1012 mlt_properties_set_double( mlt_frame_properties( *frame ), "aspect_ratio", mlt_properties_get_double( mlt_producer_properties( this ), "aspect_ratio" ) );
1014 // Calculate the next timecode
1015 mlt_producer_prepare_next( this );