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
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.
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.
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
23 #include <framework/mlt_producer.h>
24 #include <framework/mlt_frame.h>
25 #include <framework/mlt_profile.h>
27 // ffmpeg Header files
33 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
34 # include "audioconvert.h"
37 // System header files
43 #if LIBAVUTIL_VERSION_INT < (50<<16)
44 #define PIX_FMT_YUYV422 PIX_FMT_YUV422
47 void avformat_lock( );
48 void avformat_unlock( );
50 // Forward references.
51 static int producer_open( mlt_producer
this, mlt_profile profile
, char *file
);
52 static int producer_get_frame( mlt_producer
this, mlt_frame_ptr frame
, int index
);
54 /** Constructor for libavformat.
57 mlt_producer
producer_avformat_init( mlt_profile profile
, char *file
)
61 // Report information about available demuxers and codecs as YAML Tiny
62 if ( file
&& strstr( file
, "f-list" ) )
64 fprintf( stderr
, "---\nformats:\n" );
65 AVInputFormat
*format
= NULL
;
66 while ( ( format
= av_iformat_next( format
) ) )
67 fprintf( stderr
, " - %s\n", format
->name
);
68 fprintf( stderr
, "...\n" );
71 if ( file
&& strstr( file
, "acodec-list" ) )
73 fprintf( stderr
, "---\naudio_codecs:\n" );
74 AVCodec
*codec
= NULL
;
75 while ( ( codec
= av_codec_next( codec
) ) )
76 if ( codec
->decode
&& codec
->type
== CODEC_TYPE_AUDIO
)
77 fprintf( stderr
, " - %s\n", codec
->name
);
78 fprintf( stderr
, "...\n" );
81 if ( file
&& strstr( file
, "vcodec-list" ) )
83 fprintf( stderr
, "---\nvideo_codecs:\n" );
84 AVCodec
*codec
= NULL
;
85 while ( ( codec
= av_codec_next( codec
) ) )
86 if ( codec
->decode
&& codec
->type
== CODEC_TYPE_VIDEO
)
87 fprintf( stderr
, " - %s\n", codec
->name
);
88 fprintf( stderr
, "...\n" );
94 mlt_producer
this = NULL
;
96 // Check that we have a non-NULL argument
99 // Construct the producer
100 this = calloc( 1, sizeof( struct mlt_producer_s
) );
103 if ( mlt_producer_init( this, NULL
) == 0 )
105 // Get the properties
106 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
108 // Set the resource property (required for all producers)
109 mlt_properties_set( properties
, "resource", file
);
111 // Register our get_frame implementation
112 this->get_frame
= producer_get_frame
;
115 if ( producer_open( this, profile
, file
) != 0 )
118 mlt_producer_close( this );
123 // Close the file to release resources for large playlists - reopen later as needed
124 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
125 mlt_properties_set_data( properties
, "audio_context", NULL
, 0, NULL
, NULL
);
126 mlt_properties_set_data( properties
, "video_context", NULL
, 0, NULL
, NULL
);
128 // Default the user-selectable indices from the auto-detected indices
129 mlt_properties_set_int( properties
, "audio_index", mlt_properties_get_int( properties
, "_audio_index" ) );
130 mlt_properties_set_int( properties
, "video_index", mlt_properties_get_int( properties
, "_video_index" ) );
138 /** Find the default streams.
141 static mlt_properties
find_default_streams( mlt_properties meta_media
, AVFormatContext
*context
, int *audio_index
, int *video_index
)
146 mlt_properties_set_int( meta_media
, "meta.media.nb_streams", context
->nb_streams
);
148 // Allow for multiple audio and video streams in the file and select first of each (if available)
149 for( i
= 0; i
< context
->nb_streams
; i
++ )
151 // Get the codec context
152 AVStream
*stream
= context
->streams
[ i
];
153 if ( ! stream
) continue;
154 AVCodecContext
*codec_context
= stream
->codec
;
155 if ( ! codec_context
) continue;
156 AVCodec
*codec
= avcodec_find_decoder( codec_context
->codec_id
);
157 if ( ! codec
) continue;
159 snprintf( key
, sizeof(key
), "meta.media.%d.stream.type", i
);
161 // Determine the type and obtain the first index of each type
162 switch( codec_context
->codec_type
)
164 case CODEC_TYPE_VIDEO
:
165 if ( *video_index
< 0 )
167 mlt_properties_set( meta_media
, key
, "video" );
168 snprintf( key
, sizeof(key
), "meta.media.%d.stream.frame_rate", i
);
169 mlt_properties_set_double( meta_media
, key
, av_q2d( context
->streams
[ i
]->r_frame_rate
) );
170 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
171 snprintf( key
, sizeof(key
), "meta.media.%d.stream.sample_aspect_ratio", i
);
172 mlt_properties_set_double( meta_media
, key
, av_q2d( context
->streams
[ i
]->sample_aspect_ratio
) );
174 snprintf( key
, sizeof(key
), "meta.media.%d.codec.pix_fmt", i
);
175 mlt_properties_set( meta_media
, key
, avcodec_get_pix_fmt_name( codec_context
->pix_fmt
) );
176 snprintf( key
, sizeof(key
), "meta.media.%d.codec.sample_aspect_ratio", i
);
177 mlt_properties_set_double( meta_media
, key
, av_q2d( codec_context
->sample_aspect_ratio
) );
179 case CODEC_TYPE_AUDIO
:
180 if ( *audio_index
< 0 )
182 mlt_properties_set( meta_media
, key
, "audio" );
183 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
184 snprintf( key
, sizeof(key
), "meta.media.%d.codec.sample_fmt", i
);
185 mlt_properties_set( meta_media
, key
, avcodec_get_sample_fmt_name( codec_context
->sample_fmt
) );
187 snprintf( key
, sizeof(key
), "meta.media.%d.codec.sample_rate", i
);
188 mlt_properties_set_int( meta_media
, key
, codec_context
->sample_rate
);
189 snprintf( key
, sizeof(key
), "meta.media.%d.codec.channels", i
);
190 mlt_properties_set_int( meta_media
, key
, codec_context
->channels
);
195 // snprintf( key, sizeof(key), "meta.media.%d.stream.time_base", i );
196 // mlt_properties_set_double( meta_media, key, av_q2d( context->streams[ i ]->time_base ) );
197 snprintf( key
, sizeof(key
), "meta.media.%d.codec.name", i
);
198 mlt_properties_set( meta_media
, key
, codec
->name
);
199 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(55<<8)+0))
200 snprintf( key
, sizeof(key
), "meta.media.%d.codec.long_name", i
);
201 mlt_properties_set( meta_media
, key
, codec
->long_name
);
203 snprintf( key
, sizeof(key
), "meta.media.%d.codec.bit_rate", i
);
204 mlt_properties_set_int( meta_media
, key
, codec_context
->bit_rate
);
205 // snprintf( key, sizeof(key), "meta.media.%d.codec.time_base", i );
206 // mlt_properties_set_double( meta_media, key, av_q2d( codec_context->time_base ) );
207 snprintf( key
, sizeof(key
), "meta.media.%d.codec.profile", i
);
208 mlt_properties_set_int( meta_media
, key
, codec_context
->profile
);
209 snprintf( key
, sizeof(key
), "meta.media.%d.codec.level", i
);
210 mlt_properties_set_int( meta_media
, key
, codec_context
->level
);
216 /** Producer file destructor.
219 static void producer_file_close( void *context
)
221 if ( context
!= NULL
)
223 // Lock the mutex now
227 av_close_input_file( context
);
229 // Unlock the mutex now
234 /** Producer file destructor.
237 static void producer_codec_close( void *codec
)
241 // Lock the mutex now
245 avcodec_close( codec
);
247 // Unlock the mutex now
252 static inline int dv_is_pal( AVPacket
*pkt
)
254 return pkt
->data
[3] & 0x80;
257 static int dv_is_wide( AVPacket
*pkt
)
259 int i
= 80 /* block size */ *3 /* VAUX starts at block 3 */ +3 /* skip block header */;
261 for ( ; i
< pkt
->size
; i
+= 5 /* packet size */ )
263 if ( pkt
->data
[ i
] == 0x61 )
265 uint8_t x
= pkt
->data
[ i
+ 2 ] & 0x7;
266 return ( x
== 2 ) || ( x
== 7 );
272 static double get_aspect_ratio( AVStream
*stream
, AVCodecContext
*codec_context
, AVPacket
*pkt
)
274 double aspect_ratio
= 1.0;
276 if ( codec_context
->codec_id
== CODEC_ID_DVVIDEO
)
280 if ( dv_is_pal( pkt
) )
282 aspect_ratio
= dv_is_wide( pkt
)
283 ?
64.0/45.0 // 16:9 PAL
284 : 16.0/15.0; // 4:3 PAL
288 aspect_ratio
= dv_is_wide( pkt
)
289 ?
32.0/27.0 // 16:9 NTSC
290 : 8.0/9.0; // 4:3 NTSC
296 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
297 stream
->sample_aspect_ratio
;
299 codec_context
->sample_aspect_ratio
;
301 // Override FFmpeg's notion of DV aspect ratios, which are
302 // based upon a width of 704. Since we do not have a normaliser
303 // that crops (nor is cropping 720 wide ITU-R 601 video always desirable)
304 // we just coerce the values to facilitate a passive behaviour through
305 // the rescale normaliser when using equivalent producers and consumers.
306 // = display_aspect / (width * height)
307 if ( ar
.num
== 10 && ar
.den
== 11 )
308 aspect_ratio
= 8.0/9.0; // 4:3 NTSC
309 else if ( ar
.num
== 59 && ar
.den
== 54 )
310 aspect_ratio
= 16.0/15.0; // 4:3 PAL
311 else if ( ar
.num
== 40 && ar
.den
== 33 )
312 aspect_ratio
= 32.0/27.0; // 16:9 NTSC
313 else if ( ar
.num
== 118 && ar
.den
== 81 )
314 aspect_ratio
= 64.0/45.0; // 16:9 PAL
319 AVRational codec_sar
= codec_context
->sample_aspect_ratio
;
320 AVRational stream_sar
=
321 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
322 stream
->sample_aspect_ratio
;
326 if ( codec_sar
.num
> 0 )
327 aspect_ratio
= av_q2d( codec_sar
);
328 else if ( stream_sar
.num
> 0 )
329 aspect_ratio
= av_q2d( stream_sar
);
337 static int producer_open( mlt_producer
this, mlt_profile profile
, char *file
)
339 // Return an error code (0 == no error)
342 // Context for avformat
343 AVFormatContext
*context
= NULL
;
345 // Get the properties
346 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
348 // We will treat everything with the producer fps
349 double fps
= mlt_profile_fps( profile
);
351 // Lock the mutex now
354 // If "MRL", then create AVInputFormat
355 AVInputFormat
*format
= NULL
;
356 AVFormatParameters
*params
= NULL
;
357 char *standard
= NULL
;
358 char *mrl
= strchr( file
, ':' );
360 // AV option (0 = both, 1 = video, 2 = audio)
363 // Setting lowest log level
364 av_log_set_level( -1 );
366 // Only if there is not a protocol specification that avformat can handle
367 if ( mrl
&& !url_exist( file
) )
369 // 'file' becomes format abbreviation
373 format
= av_find_input_format( file
);
375 // Eat the format designator
381 params
= calloc( sizeof( AVFormatParameters
), 1 );
383 // These are required by video4linux (defaults)
385 params
->height
= 480;
386 params
->time_base
= (AVRational
){1,25};
387 // params->device = file;
388 params
->channels
= 2;
389 params
->sample_rate
= 48000;
392 // XXX: this does not work anymore since avdevice
393 // TODO: make producer_avddevice?
395 mrl
= strchr( file
, '?' );
399 char *name
= strdup( ++mrl
);
400 char *value
= strchr( name
, ':' );
405 char *t
= strchr( value
, '&' );
408 if ( !strcmp( name
, "frame_rate" ) )
409 params
->time_base
.den
= atoi( value
);
410 else if ( !strcmp( name
, "frame_rate_base" ) )
411 params
->time_base
.num
= atoi( value
);
412 else if ( !strcmp( name
, "sample_rate" ) )
413 params
->sample_rate
= atoi( value
);
414 else if ( !strcmp( name
, "channels" ) )
415 params
->channels
= atoi( value
);
416 else if ( !strcmp( name
, "width" ) )
417 params
->width
= atoi( value
);
418 else if ( !strcmp( name
, "height" ) )
419 params
->height
= atoi( value
);
420 else if ( !strcmp( name
, "standard" ) )
422 standard
= strdup( value
);
423 params
->standard
= standard
;
425 else if ( !strcmp( name
, "av" ) )
429 mrl
= strchr( mrl
, '&' );
433 // Now attempt to open the file
434 error
= av_open_input_file( &context
, file
, format
, 0, params
) < 0;
436 // Cleanup AVFormatParameters
440 // If successful, then try to get additional info
443 // Get the stream info
444 error
= av_find_stream_info( context
) < 0;
446 // Continue if no error
449 // We will default to the first audio and video streams found
450 int audio_index
= -1;
451 int video_index
= -1;
454 // Now set properties where we can (use default unknowns if required)
455 if ( context
->duration
!= AV_NOPTS_VALUE
)
457 // This isn't going to be accurate for all formats
458 mlt_position frames
= ( mlt_position
)( ( ( double )context
->duration
/ ( double )AV_TIME_BASE
) * fps
+ 0.5 );
459 mlt_properties_set_position( properties
, "out", frames
- 1 );
460 mlt_properties_set_position( properties
, "length", frames
);
463 // Find default audio and video streams
464 find_default_streams( properties
, context
, &audio_index
, &video_index
);
466 if ( context
->start_time
!= AV_NOPTS_VALUE
)
467 mlt_properties_set_double( properties
, "_start_time", context
->start_time
);
469 // Check if we're seekable (something funny about mpeg here :-/)
470 if ( strcmp( file
, "pipe:" ) && strncmp( file
, "http://", 6 ) && strncmp( file
, "udp:", 4 ) && strncmp( file
, "tcp:", 4 ) && strncmp( file
, "rtsp:", 5 ) && strncmp( file
, "rtp:", 4 ) )
472 mlt_properties_set_int( properties
, "seekable", av_seek_frame( context
, -1, mlt_properties_get_double( properties
, "_start_time" ), AVSEEK_FLAG_BACKWARD
) >= 0 );
473 mlt_properties_set_data( properties
, "dummy_context", context
, 0, producer_file_close
, NULL
);
474 av_open_input_file( &context
, file
, NULL
, 0, NULL
);
475 av_find_stream_info( context
);
480 // Store selected audio and video indexes on properties
481 mlt_properties_set_int( properties
, "_audio_index", audio_index
);
482 mlt_properties_set_int( properties
, "_video_index", video_index
);
483 mlt_properties_set_int( properties
, "_last_position", -1 );
485 // Fetch the width, height and aspect ratio
486 if ( video_index
!= -1 )
488 AVCodecContext
*codec_context
= context
->streams
[ video_index
]->codec
;
489 mlt_properties_set_int( properties
, "width", codec_context
->width
);
490 mlt_properties_set_int( properties
, "height", codec_context
->height
);
492 if ( codec_context
->codec_id
== CODEC_ID_DVVIDEO
)
494 // Fetch the first frame of DV so we can read it directly
499 ret
= av_read_frame( context
, &pkt
);
500 if ( ret
>= 0 && pkt
.stream_index
== video_index
&& pkt
.size
> 0 )
502 mlt_properties_set_double( properties
, "aspect_ratio",
503 get_aspect_ratio( context
->streams
[ video_index
], codec_context
, &pkt
) );
510 mlt_properties_set_double( properties
, "aspect_ratio",
511 get_aspect_ratio( context
->streams
[ video_index
], codec_context
, NULL
) );
516 if (context
->title
!= NULL
)
517 mlt_properties_set(properties
, "meta.attr.title.markup", context
->title
);
518 if (context
->author
!= NULL
)
519 mlt_properties_set(properties
, "meta.attr.author.markup", context
->author
);
520 if (context
->copyright
!= NULL
)
521 mlt_properties_set(properties
, "meta.attr.copyright.markup", context
->copyright
);
522 if (context
->comment
!= NULL
)
523 mlt_properties_set(properties
, "meta.attr.comment.markup", context
->comment
);
524 if (context
->album
!= NULL
)
525 mlt_properties_set(properties
, "meta.attr.album.markup", context
->album
);
526 if (context
->year
!= 0)
527 mlt_properties_set_int(properties
, "meta.attr.year.markup", context
->year
);
528 if (context
->track
!= 0)
529 mlt_properties_set_int(properties
, "meta.attr.track.markup", context
->track
);
531 // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later)
532 if ( av
== 0 && audio_index
!= -1 && video_index
!= -1 )
534 // We'll use the open one as our video_context
535 mlt_properties_set_data( properties
, "video_context", context
, 0, producer_file_close
, NULL
);
537 // And open again for our audio context
538 av_open_input_file( &context
, file
, NULL
, 0, NULL
);
539 av_find_stream_info( context
);
542 mlt_properties_set_data( properties
, "audio_context", context
, 0, producer_file_close
, NULL
);
544 else if ( av
!= 2 && video_index
!= -1 )
546 // We only have a video context
547 mlt_properties_set_data( properties
, "video_context", context
, 0, producer_file_close
, NULL
);
549 else if ( audio_index
!= -1 )
551 // We only have an audio context
552 mlt_properties_set_data( properties
, "audio_context", context
, 0, producer_file_close
, NULL
);
556 // Something has gone wrong
560 mlt_properties_set_int( properties
, "av_bypass", av_bypass
);
564 // Unlock the mutex now
570 /** Convert a frame position to a time code.
573 static double producer_time_of_frame( mlt_producer
this, mlt_position position
)
575 return ( double )position
/ mlt_producer_get_fps( this );
578 static inline void convert_image( AVFrame
*frame
, uint8_t *buffer
, int pix_fmt
, mlt_image_format format
, int width
, int height
)
581 if ( format
== mlt_image_yuv420p
)
583 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
584 width
, height
, PIX_FMT_YUV420P
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
586 output
.data
[0] = buffer
;
587 output
.data
[1] = buffer
+ width
* height
;
588 output
.data
[2] = buffer
+ ( 3 * width
* height
) / 2;
589 output
.linesize
[0] = width
;
590 output
.linesize
[1] = width
>> 1;
591 output
.linesize
[2] = width
>> 1;
592 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
593 output
.data
, output
.linesize
);
594 sws_freeContext( context
);
596 else if ( format
== mlt_image_rgb24
)
598 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
599 width
, height
, PIX_FMT_RGB24
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
601 avpicture_fill( &output
, buffer
, PIX_FMT_RGB24
, width
, height
);
602 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
603 output
.data
, output
.linesize
);
604 sws_freeContext( context
);
608 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
609 width
, height
, PIX_FMT_YUYV422
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
611 avpicture_fill( &output
, buffer
, PIX_FMT_YUYV422
, width
, height
);
612 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
613 output
.data
, output
.linesize
);
614 sws_freeContext( context
);
617 if ( format
== mlt_image_yuv420p
)
620 pict
.data
[0] = buffer
;
621 pict
.data
[1] = buffer
+ width
* height
;
622 pict
.data
[2] = buffer
+ ( 3 * width
* height
) / 2;
623 pict
.linesize
[0] = width
;
624 pict
.linesize
[1] = width
>> 1;
625 pict
.linesize
[2] = width
>> 1;
626 img_convert( &pict
, PIX_FMT_YUV420P
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
628 else if ( format
== mlt_image_rgb24
)
631 avpicture_fill( &output
, buffer
, PIX_FMT_RGB24
, width
, height
);
632 img_convert( &output
, PIX_FMT_RGB24
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
637 avpicture_fill( &output
, buffer
, PIX_FMT_YUYV422
, width
, height
);
638 img_convert( &output
, PIX_FMT_YUYV422
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
643 /** Allocate the image buffer and set it on the frame.
646 static int allocate_buffer( mlt_properties frame_properties
, AVCodecContext
*codec_context
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
)
650 if ( codec_context
->width
== 0 || codec_context
->height
== 0 )
653 *width
= codec_context
->width
;
654 *height
= codec_context
->height
;
655 mlt_properties_set_int( frame_properties
, "width", *width
);
656 mlt_properties_set_int( frame_properties
, "height", *height
);
660 case mlt_image_yuv420p
:
661 size
= *width
* 3 * ( *height
+ 1 ) / 2;
663 case mlt_image_rgb24
:
664 size
= *width
* ( *height
+ 1 ) * 3;
667 *format
= mlt_image_yuv422
;
668 size
= *width
* ( *height
+ 1 ) * 2;
672 // Construct the output image
673 *buffer
= mlt_pool_alloc( size
);
675 mlt_properties_set_data( frame_properties
, "image", *buffer
, size
, (mlt_destructor
)mlt_pool_release
, NULL
);
682 /** Get an image from a frame.
685 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
687 // Get the properties from the frame
688 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
690 // Obtain the frame number of this frame
691 mlt_position position
= mlt_properties_get_position( frame_properties
, "avformat_position" );
694 mlt_producer
this = mlt_properties_get_data( frame_properties
, "avformat_producer", NULL
);
696 // Get the producer properties
697 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
699 // Fetch the video_context
700 AVFormatContext
*context
= mlt_properties_get_data( properties
, "video_context", NULL
);
702 // Get the video_index
703 int index
= mlt_properties_get_int( properties
, "video_index" );
705 // Obtain the expected frame numer
706 mlt_position expected
= mlt_properties_get_position( properties
, "_video_expected" );
708 // Get the video stream
709 AVStream
*stream
= context
->streams
[ index
];
712 AVCodecContext
*codec_context
= stream
->codec
;
717 // Get the conversion frame
718 AVFrame
*av_frame
= mlt_properties_get_data( properties
, "av_frame", NULL
);
720 // Special case pause handling flag
723 // Special case ffwd handling
726 // We may want to use the source fps if available
727 double source_fps
= mlt_properties_get_double( properties
, "source_fps" );
728 double fps
= mlt_producer_get_fps( this );
730 // This is the physical frame position in the source
731 int req_position
= ( int )( position
/ fps
* source_fps
+ 0.5 );
733 // Get the seekable status
734 int seekable
= mlt_properties_get_int( properties
, "seekable" );
736 // Hopefully provide better support for streams...
737 int av_bypass
= mlt_properties_get_int( properties
, "av_bypass" );
739 // Determines if we have to decode all frames in a sequence
742 // Temporary hack to improve intra frame only
743 must_decode
= strcmp( codec_context
->codec
->name
, "dnxhd" ) &&
744 strcmp( codec_context
->codec
->name
, "dvvideo" ) &&
745 strcmp( codec_context
->codec
->name
, "huffyuv" ) &&
746 strcmp( codec_context
->codec
->name
, "mjpeg" ) &&
747 strcmp( codec_context
->codec
->name
, "rawvideo" );
750 if ( position
!= expected
)
752 if ( av_frame
!= NULL
&& position
+ 1 == expected
)
754 // We're paused - use last image
757 else if ( !seekable
&& position
> expected
&& ( position
- expected
) < 250 )
759 // Fast forward - seeking is inefficient for small distances - just ignore following frames
760 ignore
= ( int )( ( position
- expected
) / fps
* source_fps
);
762 else if ( seekable
&& ( position
< expected
|| position
- expected
>= 12 ) )
764 // Calculate the timestamp for the requested frame
765 int64_t timestamp
= ( int64_t )( ( double )req_position
/ source_fps
* AV_TIME_BASE
+ 0.5 );
766 if ( ( uint64_t )context
->start_time
!= AV_NOPTS_VALUE
)
767 timestamp
+= context
->start_time
;
769 timestamp
-= AV_TIME_BASE
;
773 // Set to the timestamp
774 av_seek_frame( context
, -1, timestamp
, AVSEEK_FLAG_BACKWARD
);
776 // Remove the cached info relating to the previous position
777 mlt_properties_set_int( properties
, "_current_position", -1 );
778 mlt_properties_set_int( properties
, "_last_position", -1 );
779 mlt_properties_set_data( properties
, "av_frame", NULL
, 0, NULL
, NULL
);
784 // Duplicate the last image if necessary (see comment on rawvideo below)
785 int current_position
= mlt_properties_get_int( properties
, "_current_position" );
786 int got_picture
= mlt_properties_get_int( properties
, "_got_picture" );
787 if ( av_frame
!= NULL
&& got_picture
&& ( paused
|| current_position
>= req_position
) && av_bypass
== 0 )
790 if ( allocate_buffer( frame_properties
, codec_context
, buffer
, format
, width
, height
) )
791 convert_image( av_frame
, *buffer
, codec_context
->pix_fmt
, *format
, *width
, *height
);
793 mlt_frame_get_image( frame
, buffer
, format
, width
, height
, writable
);
798 int int_position
= 0;
801 av_init_packet( &pkt
);
803 // Construct an AVFrame for YUV422 conversion
804 if ( av_frame
== NULL
)
805 av_frame
= avcodec_alloc_frame( );
807 while( ret
>= 0 && !got_picture
)
810 ret
= av_read_frame( context
, &pkt
);
812 // We only deal with video from the selected video_index
813 if ( ret
>= 0 && pkt
.stream_index
== index
&& pkt
.size
> 0 )
815 // Determine time code of the packet
816 int_position
= ( int )( av_q2d( stream
->time_base
) * pkt
.dts
* source_fps
+ 0.5 );
817 if ( context
->start_time
!= AV_NOPTS_VALUE
)
818 int_position
-= ( int )( context
->start_time
* source_fps
/ AV_TIME_BASE
+ 0.5 );
819 int last_position
= mlt_properties_get_int( properties
, "_last_position" );
820 if ( int_position
== last_position
)
821 int_position
= last_position
+ 1;
822 mlt_properties_set_int( properties
, "_last_position", int_position
);
825 if ( must_decode
|| int_position
>= req_position
)
826 ret
= avcodec_decode_video( codec_context
, av_frame
, &got_picture
, pkt
.data
, pkt
.size
);
831 if ( int_position
< req_position
)
836 else if ( int_position
>= req_position
)
840 else if ( ignore
-- )
845 av_free_packet( &pkt
);
849 av_free_packet( &pkt
);
852 // Now handle the picture if we have one
855 if ( allocate_buffer( frame_properties
, codec_context
, buffer
, format
, width
, height
) )
857 convert_image( av_frame
, *buffer
, codec_context
->pix_fmt
, *format
, *width
, *height
);
858 mlt_properties_set_int( frame_properties
, "progressive", !av_frame
->interlaced_frame
);
859 mlt_properties_set_int( properties
, "top_field_first", av_frame
->top_field_first
);
860 mlt_properties_set_int( properties
, "_current_position", int_position
);
861 mlt_properties_set_int( properties
, "_got_picture", 1 );
862 mlt_properties_set_data( properties
, "av_frame", av_frame
, 0, av_free
, NULL
);
871 mlt_frame_get_image( frame
, buffer
, format
, width
, height
, writable
);
874 // Very untidy - for rawvideo, the packet contains the frame, hence the free packet
875 // above will break the pause behaviour - so we wipe the frame now
876 if ( !strcmp( codec_context
->codec
->name
, "rawvideo" ) )
877 mlt_properties_set_data( properties
, "av_frame", NULL
, 0, NULL
, NULL
);
879 // Set the field order property for this frame
880 mlt_properties_set_int( frame_properties
, "top_field_first", mlt_properties_get_int( properties
, "top_field_first" ) );
882 // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
883 mlt_properties_set_position( properties
, "_video_expected", position
+ 1 );
888 /** Process properties as AVOptions and apply to AV context obj
891 static void apply_properties( void *obj
, mlt_properties properties
, int flags
)
894 int count
= mlt_properties_count( properties
);
895 for ( i
= 0; i
< count
; i
++ )
897 const char *opt_name
= mlt_properties_get_name( properties
, i
);
898 const AVOption
*opt
= av_find_opt( obj
, opt_name
, NULL
, flags
, flags
);
900 #if LIBAVCODEC_VERSION_INT >= ((52<<16)+(7<<8)+0)
901 av_set_string3( obj
, opt_name
, mlt_properties_get( properties
, opt_name
), 0, NULL
);
902 #elif LIBAVCODEC_VERSION_INT >= ((51<<16)+(59<<8)+0)
903 av_set_string2( obj
, opt_name
, mlt_properties_get( properties
, opt_name
), 0 );
905 av_set_string( obj
, opt_name
, mlt_properties_get( properties
, opt_name
) );
910 /** Set up video handling.
913 static void producer_set_up_video( mlt_producer
this, mlt_frame frame
)
915 // Get the properties
916 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
918 // Fetch the video_context
919 AVFormatContext
*context
= mlt_properties_get_data( properties
, "video_context", NULL
);
921 // Get the video_index
922 int index
= mlt_properties_get_int( properties
, "video_index" );
924 // Reopen the file if necessary
925 if ( !context
&& index
> -1 )
927 mlt_events_block( properties
, this );
928 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
929 mlt_properties_get( properties
, "resource" ) );
930 context
= mlt_properties_get_data( properties
, "video_context", NULL
);
931 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
932 mlt_events_unblock( properties
, this );
934 // Process properties as AVOptions
935 apply_properties( context
, properties
, AV_OPT_FLAG_DECODING_PARAM
);
938 // Exception handling for video_index
939 if ( context
&& index
>= (int) context
->nb_streams
)
941 // Get the last video stream
942 for ( index
= context
->nb_streams
- 1; index
>= 0 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_VIDEO
; --index
);
943 mlt_properties_set_int( properties
, "video_index", index
);
945 if ( context
&& index
> -1 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_VIDEO
)
947 // Invalidate the video stream
949 mlt_properties_set_int( properties
, "video_index", index
);
952 // Get the frame properties
953 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
955 if ( context
&& index
> -1 )
957 // Get the video stream
958 AVStream
*stream
= context
->streams
[ index
];
961 AVCodecContext
*codec_context
= stream
->codec
;
964 AVCodec
*codec
= mlt_properties_get_data( properties
, "video_codec", NULL
);
966 // Update the video properties if the index changed
967 if ( index
!= mlt_properties_get_int( properties
, "_video_index" ) )
969 // Reset the video properties if the index changed
970 mlt_properties_set_int( properties
, "_video_index", index
);
971 mlt_properties_set_data( properties
, "video_codec", NULL
, 0, NULL
, NULL
);
972 mlt_properties_set_int( properties
, "width", codec_context
->width
);
973 mlt_properties_set_int( properties
, "height", codec_context
->height
);
974 // TODO: get the first usable AVPacket and reset the stream position
975 mlt_properties_set_double( properties
, "aspect_ratio",
976 get_aspect_ratio( context
->streams
[ index
], codec_context
, NULL
) );
980 // Initialise the codec if necessary
983 // Initialise multi-threading
984 int thread_count
= mlt_properties_get_int( properties
, "threads" );
985 if ( thread_count
== 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
986 thread_count
= atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
987 if ( thread_count
> 1 )
989 avcodec_thread_init( codec_context
, thread_count
);
990 codec_context
->thread_count
= thread_count
;
994 codec
= avcodec_find_decoder( codec_context
->codec_id
);
996 // If we don't have a codec and we can't initialise it, we can't do much more...
998 if ( codec
!= NULL
&& avcodec_open( codec_context
, codec
) >= 0 )
1000 // Now store the codec with its destructor
1001 mlt_properties_set_data( properties
, "video_codec", codec_context
, 0, producer_codec_close
, NULL
);
1005 // Remember that we can't use this later
1006 mlt_properties_set_int( properties
, "video_index", -1 );
1011 // Process properties as AVOptions
1012 apply_properties( codec_context
, properties
, AV_OPT_FLAG_VIDEO_PARAM
| AV_OPT_FLAG_DECODING_PARAM
);
1015 // No codec, no show...
1016 if ( codec
&& index
> -1 )
1018 double source_fps
= 0;
1019 double force_aspect_ratio
= mlt_properties_get_double( properties
, "force_aspect_ratio" );
1020 double aspect_ratio
= ( force_aspect_ratio
> 0.0 ) ?
1021 force_aspect_ratio
: mlt_properties_get_double( properties
, "aspect_ratio" );
1023 // Determine the fps
1024 source_fps
= ( double )codec_context
->time_base
.den
/ ( codec_context
->time_base
.num
== 0 ?
1 : codec_context
->time_base
.num
);
1026 // We'll use fps if it's available
1027 if ( source_fps
> 0 )
1028 mlt_properties_set_double( properties
, "source_fps", source_fps
);
1030 mlt_properties_set_double( properties
, "source_fps", mlt_producer_get_fps( this ) );
1031 mlt_properties_set_double( properties
, "aspect_ratio", aspect_ratio
);
1033 // Set the width and height
1034 mlt_properties_set_int( frame_properties
, "width", codec_context
->width
);
1035 mlt_properties_set_int( frame_properties
, "height", codec_context
->height
);
1036 mlt_properties_set_int( frame_properties
, "real_width", codec_context
->width
);
1037 mlt_properties_set_int( frame_properties
, "real_height", codec_context
->height
);
1038 mlt_properties_set_double( frame_properties
, "aspect_ratio", aspect_ratio
);
1040 mlt_frame_push_get_image( frame
, producer_get_image
);
1041 mlt_properties_set_data( frame_properties
, "avformat_producer", this, 0, NULL
, NULL
);
1045 mlt_properties_set_int( frame_properties
, "test_image", 1 );
1050 mlt_properties_set_int( frame_properties
, "test_image", 1 );
1054 /** Get the audio from a frame.
1057 static int producer_get_audio( mlt_frame frame
, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
1059 // Get the properties from the frame
1060 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
1062 // Obtain the frame number of this frame
1063 mlt_position position
= mlt_properties_get_position( frame_properties
, "avformat_position" );
1066 mlt_producer
this = mlt_properties_get_data( frame_properties
, "avformat_producer", NULL
);
1068 // Get the producer properties
1069 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
1071 // Fetch the audio_context
1072 AVFormatContext
*context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
1074 // Get the audio_index
1075 int index
= mlt_properties_get_int( properties
, "audio_index" );
1077 // Get the seekable status
1078 int seekable
= mlt_properties_get_int( properties
, "seekable" );
1080 // Obtain the expected frame numer
1081 mlt_position expected
= mlt_properties_get_position( properties
, "_audio_expected" );
1083 // Obtain the resample context if it exists (not always needed)
1084 ReSampleContext
*resample
= mlt_properties_get_data( properties
, "audio_resample", NULL
);
1086 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
1087 // Get the format converter context if it exists
1088 AVAudioConvert
*convert
= mlt_properties_get_data( properties
, "audio_convert", NULL
);
1091 // Obtain the audio buffers
1092 int16_t *audio_buffer
= mlt_properties_get_data( properties
, "audio_buffer", NULL
);
1093 int16_t *decode_buffer
= mlt_properties_get_data( properties
, "decode_buffer", NULL
);
1094 int16_t *convert_buffer
= mlt_properties_get_data( properties
, "convert_buffer", NULL
);
1096 // Get amount of audio used
1097 int audio_used
= mlt_properties_get_int( properties
, "_audio_used" );
1099 // Calculate the real time code
1100 double real_timecode
= producer_time_of_frame( this, position
);
1102 // Get the audio stream
1103 AVStream
*stream
= context
->streams
[ index
];
1105 // Get codec context
1106 AVCodecContext
*codec_context
= stream
->codec
;
1111 // Number of frames to ignore (for ffwd)
1114 // Flag for paused (silence)
1117 // Check for resample and create if necessary
1118 if ( resample
== NULL
&& codec_context
->channels
<= 2 )
1120 // Create the resampler
1121 resample
= audio_resample_init( *channels
, codec_context
->channels
, *frequency
, codec_context
->sample_rate
);
1123 // And store it on properties
1124 mlt_properties_set_data( properties
, "audio_resample", resample
, 0, ( mlt_destructor
)audio_resample_close
, NULL
);
1126 else if ( resample
== NULL
)
1128 *channels
= codec_context
->channels
;
1129 *frequency
= codec_context
->sample_rate
;
1132 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
1133 // Check for audio format converter and create if necessary
1134 // TODO: support higher resolutions than 16-bit.
1135 if ( convert
== NULL
&& codec_context
->sample_fmt
!= SAMPLE_FMT_S16
)
1137 // Create single channel converter for interleaved with no mixing matrix
1138 convert
= av_audio_convert_alloc( SAMPLE_FMT_S16
, 1, codec_context
->sample_fmt
, 1, NULL
, 0 );
1139 mlt_properties_set_data( properties
, "audio_convert", convert
, 0, ( mlt_destructor
)av_audio_convert_free
, NULL
);
1143 // Check for audio buffer and create if necessary
1144 if ( audio_buffer
== NULL
)
1146 // Allocate the audio buffer
1147 audio_buffer
= mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE
* sizeof( int16_t ) );
1149 // And store it on properties for reuse
1150 mlt_properties_set_data( properties
, "audio_buffer", audio_buffer
, 0, ( mlt_destructor
)mlt_pool_release
, NULL
);
1153 // Check for decoder buffer and create if necessary
1154 if ( decode_buffer
== NULL
)
1156 // Allocate the audio buffer
1157 decode_buffer
= av_malloc( AVCODEC_MAX_AUDIO_FRAME_SIZE
* sizeof( int16_t ) );
1159 // And store it on properties for reuse
1160 mlt_properties_set_data( properties
, "decode_buffer", decode_buffer
, 0, ( mlt_destructor
)av_free
, NULL
);
1163 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
1164 // Check for format converter buffer and create if necessary
1165 if ( resample
&& convert
&& convert_buffer
== NULL
)
1167 // Allocate the audio buffer
1168 convert_buffer
= mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE
* sizeof( int16_t ) );
1170 // And store it on properties for reuse
1171 mlt_properties_set_data( properties
, "convert_buffer", convert_buffer
, 0, ( mlt_destructor
)mlt_pool_release
, NULL
);
1175 // Seek if necessary
1176 if ( position
!= expected
)
1178 if ( position
+ 1 == expected
)
1180 // We're paused - silence required
1183 else if ( !seekable
&& position
> expected
&& ( position
- expected
) < 250 )
1185 // Fast forward - seeking is inefficient for small distances - just ignore following frames
1186 ignore
= position
- expected
;
1188 else if ( position
< expected
|| position
- expected
>= 12 )
1190 int64_t timestamp
= ( int64_t )( real_timecode
* AV_TIME_BASE
+ 0.5 );
1191 if ( context
->start_time
!= AV_NOPTS_VALUE
)
1192 timestamp
+= context
->start_time
;
1193 if ( timestamp
< 0 )
1196 // Set to the real timecode
1197 if ( av_seek_frame( context
, -1, timestamp
, AVSEEK_FLAG_BACKWARD
) != 0 )
1200 // Clear the usage in the audio buffer
1205 // Get the audio if required
1211 av_init_packet( &pkt
);
1213 while( ret
>= 0 && !got_audio
)
1215 // Check if the buffer already contains the samples required
1216 if ( audio_used
>= *samples
&& ignore
== 0 )
1223 ret
= av_read_frame( context
, &pkt
);
1226 uint8_t *ptr
= pkt
.data
;
1228 // We only deal with audio from the selected audio_index
1229 while ( ptr
!= NULL
&& ret
>= 0 && pkt
.stream_index
== index
&& len
> 0 )
1231 int data_size
= sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE
;
1234 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(29<<8)+0))
1235 ret
= avcodec_decode_audio2( codec_context
, decode_buffer
, &data_size
, ptr
, len
);
1237 ret
= avcodec_decode_audio( codec_context
, decode_buffer
, &data_size
, ptr
, len
);
1248 if ( data_size
> 0 )
1250 int src_stride
[6]= { av_get_bits_per_sample_format( codec_context
->sample_fmt
) / 8 };
1251 int dst_stride
[6]= { av_get_bits_per_sample_format( SAMPLE_FMT_S16
) / 8 };
1255 int16_t *source
= decode_buffer
;
1256 int16_t *dest
= &audio_buffer
[ audio_used
* *channels
];
1257 int convert_samples
= data_size
/ src_stride
[0];
1259 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
1262 const void *src_buf
[6] = { decode_buffer
};
1263 void *dst_buf
[6] = { convert_buffer
};
1264 av_audio_convert( convert
, dst_buf
, dst_stride
, src_buf
, src_stride
, convert_samples
);
1265 source
= convert_buffer
;
1268 audio_used
+= audio_resample( resample
, dest
, source
, convert_samples
/ codec_context
->channels
);
1272 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(71<<8)+0))
1275 const void *src_buf
[6] = { decode_buffer
};
1276 void *dst_buf
[6] = { &audio_buffer
[ audio_used
* *channels
] };
1277 av_audio_convert( convert
, dst_buf
, dst_stride
, src_buf
, src_stride
, data_size
/ src_stride
[0] );
1282 memcpy( &audio_buffer
[ audio_used
* *channels
], decode_buffer
, data_size
);
1284 audio_used
+= data_size
/ *channels
/ src_stride
[0];
1288 while ( ignore
&& audio_used
> *samples
)
1291 audio_used
-= *samples
;
1292 memmove( audio_buffer
, &audio_buffer
[ *samples
* *channels
], audio_used
* sizeof( int16_t ) );
1296 // If we're behind, ignore this packet
1299 double current_pts
= av_q2d( stream
->time_base
) * pkt
.pts
;
1300 double source_fps
= mlt_properties_get_double( properties
, "source_fps" );
1301 int req_position
= ( int )( real_timecode
* source_fps
+ 0.5 );
1302 int int_position
= ( int )( current_pts
* source_fps
+ 0.5 );
1304 if ( context
->start_time
!= AV_NOPTS_VALUE
)
1305 int_position
-= ( int )( context
->start_time
* source_fps
/ AV_TIME_BASE
+ 0.5 );
1306 if ( seekable
&& !ignore
&& int_position
< req_position
)
1311 // We're finished with this packet regardless
1312 av_free_packet( &pkt
);
1315 *buffer
= mlt_pool_alloc( *samples
* *channels
* sizeof( int16_t ) );
1316 mlt_properties_set_data( frame_properties
, "audio", *buffer
, 0, ( mlt_destructor
)mlt_pool_release
, NULL
);
1318 // Now handle the audio if we have enough
1319 if ( audio_used
>= *samples
)
1321 memcpy( *buffer
, audio_buffer
, *samples
* *channels
* sizeof( int16_t ) );
1322 audio_used
-= *samples
;
1323 memmove( audio_buffer
, &audio_buffer
[ *samples
* *channels
], audio_used
* *channels
* sizeof( int16_t ) );
1327 memset( *buffer
, 0, *samples
* *channels
* sizeof( int16_t ) );
1330 // Store the number of audio samples still available
1331 mlt_properties_set_int( properties
, "_audio_used", audio_used
);
1335 // Get silence and don't touch the context
1336 mlt_frame_get_audio( frame
, buffer
, format
, frequency
, channels
, samples
);
1339 // Regardless of speed (other than paused), we expect to get the next frame
1341 mlt_properties_set_position( properties
, "_audio_expected", position
+ 1 );
1346 /** Set up audio handling.
1349 static void producer_set_up_audio( mlt_producer
this, mlt_frame frame
)
1351 // Get the properties
1352 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
1354 // Fetch the audio_context
1355 AVFormatContext
*context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
1357 // Get the audio_index
1358 int index
= mlt_properties_get_int( properties
, "audio_index" );
1360 // Reopen the file if necessary
1361 if ( !context
&& index
> -1 )
1363 mlt_events_block( properties
, this );
1364 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
1365 mlt_properties_get( properties
, "resource" ) );
1366 context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
1367 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
1368 mlt_events_unblock( properties
, this );
1371 // Exception handling for audio_index
1372 if ( context
&& index
>= (int) context
->nb_streams
)
1374 for ( index
= context
->nb_streams
- 1; index
>= 0 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_AUDIO
; --index
);
1375 mlt_properties_set_int( properties
, "audio_index", index
);
1377 if ( context
&& index
> -1 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_AUDIO
)
1380 mlt_properties_set_int( properties
, "audio_index", index
);
1383 // Update the audio properties if the index changed
1384 if ( index
> -1 && index
!= mlt_properties_get_int( properties
, "_audio_index" ) )
1386 mlt_properties_set_int( properties
, "_audio_index", index
);
1387 mlt_properties_set_data( properties
, "audio_codec", NULL
, 0, NULL
, NULL
);
1390 // Deal with audio context
1391 if ( context
!= NULL
&& index
> -1 )
1393 // Get the frame properties
1394 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
1396 // Get the audio stream
1397 AVStream
*stream
= context
->streams
[ index
];
1399 // Get codec context
1400 AVCodecContext
*codec_context
= stream
->codec
;
1403 AVCodec
*codec
= mlt_properties_get_data( properties
, "audio_codec", NULL
);
1405 // Initialise the codec if necessary
1406 if ( codec
== NULL
)
1409 codec
= avcodec_find_decoder( codec_context
->codec_id
);
1411 // If we don't have a codec and we can't initialise it, we can't do much more...
1413 if ( codec
!= NULL
&& avcodec_open( codec_context
, codec
) >= 0 )
1415 // Now store the codec with its destructor
1416 mlt_properties_set_data( properties
, "audio_codec", codec_context
, 0, producer_codec_close
, NULL
);
1421 // Remember that we can't use this later
1422 mlt_properties_set_int( properties
, "audio_index", -1 );
1427 // Process properties as AVOptions
1428 apply_properties( codec_context
, properties
, AV_OPT_FLAG_AUDIO_PARAM
| AV_OPT_FLAG_DECODING_PARAM
);
1431 // No codec, no show...
1432 if ( codec
&& index
> -1 )
1434 mlt_frame_push_audio( frame
, producer_get_audio
);
1435 mlt_properties_set_data( frame_properties
, "avformat_producer", this, 0, NULL
, NULL
);
1436 mlt_properties_set_int( frame_properties
, "frequency", codec_context
->sample_rate
);
1437 mlt_properties_set_int( frame_properties
, "channels", codec_context
->channels
);
1442 /** Our get frame implementation.
1445 static int producer_get_frame( mlt_producer
this, mlt_frame_ptr frame
, int index
)
1447 // Create an empty frame
1448 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( this ) );
1450 // Update timecode on the frame we're creating
1451 mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
1453 // Set the position of this producer
1454 mlt_properties_set_position( MLT_FRAME_PROPERTIES( *frame
), "avformat_position", mlt_producer_frame( this ) );
1457 producer_set_up_video( this, *frame
);
1460 producer_set_up_audio( this, *frame
);
1462 // Set the aspect_ratio
1463 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "aspect_ratio", mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "aspect_ratio" ) );
1465 // Calculate the next timecode
1466 mlt_producer_prepare_next( this );