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>
26 // ffmpeg Header files
32 // System header files
38 void avformat_lock( );
39 void avformat_unlock( );
41 // Forward references.
42 static int producer_open( mlt_producer
this, mlt_profile profile
, char *file
);
43 static int producer_get_frame( mlt_producer
this, mlt_frame_ptr frame
, int index
);
45 /** Constructor for libavformat.
48 mlt_producer
producer_avformat_init( mlt_profile profile
, char *file
)
50 mlt_producer
this = NULL
;
52 // Check that we have a non-NULL argument
55 // Construct the producer
56 this = calloc( 1, sizeof( struct mlt_producer_s
) );
59 if ( mlt_producer_init( this, NULL
) == 0 )
62 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
64 // Set the resource property (required for all producers)
65 mlt_properties_set( properties
, "resource", file
);
67 // Register our get_frame implementation
68 this->get_frame
= producer_get_frame
;
71 if ( producer_open( this, profile
, file
) != 0 )
74 mlt_producer_close( this );
79 // Close the file to release resources for large playlists - reopen later as needed
80 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
81 mlt_properties_set_data( properties
, "audio_context", NULL
, 0, NULL
, NULL
);
82 mlt_properties_set_data( properties
, "video_context", NULL
, 0, NULL
, NULL
);
84 // Default the user-selectable indices from the auto-detected indices
85 mlt_properties_set_int( properties
, "audio_index", mlt_properties_get_int( properties
, "_audio_index" ) );
86 mlt_properties_set_int( properties
, "video_index", mlt_properties_get_int( properties
, "_video_index" ) );
94 /** Find the default streams.
97 static void find_default_streams( AVFormatContext
*context
, int *audio_index
, int *video_index
)
101 // Allow for multiple audio and video streams in the file and select first of each (if available)
102 for( i
= 0; i
< context
->nb_streams
; i
++ )
104 // Get the codec context
105 AVCodecContext
*codec_context
= context
->streams
[ i
]->codec
;
107 if ( avcodec_find_decoder( codec_context
->codec_id
) == NULL
)
110 // Determine the type and obtain the first index of each type
111 switch( codec_context
->codec_type
)
113 case CODEC_TYPE_VIDEO
:
114 if ( *video_index
< 0 )
117 case CODEC_TYPE_AUDIO
:
118 if ( *audio_index
< 0 )
127 /** Producer file destructor.
130 static void producer_file_close( void *context
)
132 if ( context
!= NULL
)
134 // Lock the mutex now
138 av_close_input_file( context
);
140 // Unlock the mutex now
145 /** Producer file destructor.
148 static void producer_codec_close( void *codec
)
152 // Lock the mutex now
156 avcodec_close( codec
);
158 // Unlock the mutex now
163 static double get_aspect_ratio( AVStream
*stream
, AVCodecContext
*codec_context
)
165 double aspect_ratio
= 1.0;
167 if ( codec_context
->codec_id
== CODEC_ID_DVVIDEO
)
170 // #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
171 // stream->sample_aspect_ratio;
173 codec_context
->sample_aspect_ratio
;
175 // Override FFmpeg's notion of DV aspect ratios, which are
176 // based upon a width of 704. Since we do not have a normaliser
177 // that crops (nor is cropping 720 wide ITU-R 601 video always desirable)
178 // we just coerce the values to facilitate a passive behaviour through
179 // the rescale normaliser when using equivalent producers and consumers.
180 // = display_aspect / (width * height)
181 if ( ar
.num
== 10 && ar
.den
== 11 )
182 aspect_ratio
= 8.0/9.0; // 4:3 NTSC
183 else if ( ar
.num
== 59 && ar
.den
== 54 )
184 aspect_ratio
= 16.0/15.0; // 4:3 PAL
185 else if ( ar
.num
== 40 && ar
.den
== 33 )
186 aspect_ratio
= 32.0/27.0; // 16:9 NTSC
187 else if ( ar
.num
== 118 && ar
.den
== 81 )
188 aspect_ratio
= 64.0/45.0; // 16:9 PAL
192 AVRational codec_sar
= codec_context
->sample_aspect_ratio
;
193 AVRational stream_sar
=
194 #if LIBAVFORMAT_VERSION_INT >= ((52<<16)+(21<<8)+0)
195 stream
->sample_aspect_ratio
;
199 if ( codec_sar
.num
> 0 )
200 aspect_ratio
= av_q2d( codec_sar
);
201 else if ( stream_sar
.num
> 0 )
202 aspect_ratio
= av_q2d( stream_sar
);
210 static int producer_open( mlt_producer
this, mlt_profile profile
, char *file
)
212 // Return an error code (0 == no error)
215 // Context for avformat
216 AVFormatContext
*context
= NULL
;
218 // Get the properties
219 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
221 // We will treat everything with the producer fps
222 double fps
= mlt_profile_fps( profile
);
224 // Lock the mutex now
227 // If "MRL", then create AVInputFormat
228 AVInputFormat
*format
= NULL
;
229 AVFormatParameters
*params
= NULL
;
230 char *standard
= NULL
;
231 char *mrl
= strchr( file
, ':' );
233 // AV option (0 = both, 1 = video, 2 = audio)
236 // Setting lowest log level
237 av_log_set_level( -1 );
239 // Only if there is not a protocol specification that avformat can handle
240 if ( mrl
&& !url_exist( file
) )
242 // 'file' becomes format abbreviation
246 format
= av_find_input_format( file
);
248 // Eat the format designator
254 params
= calloc( sizeof( AVFormatParameters
), 1 );
256 // These are required by video4linux (defaults)
258 params
->height
= 480;
259 params
->time_base
= (AVRational
){1,25};
260 // params->device = file;
261 params
->channels
= 2;
262 params
->sample_rate
= 48000;
265 // XXX: this does not work anymore since avdevice
266 // TODO: make producer_avddevice?
268 mrl
= strchr( file
, '?' );
272 char *name
= strdup( ++mrl
);
273 char *value
= strchr( name
, ':' );
278 char *t
= strchr( value
, '&' );
281 if ( !strcmp( name
, "frame_rate" ) )
282 params
->time_base
.den
= atoi( value
);
283 else if ( !strcmp( name
, "frame_rate_base" ) )
284 params
->time_base
.num
= atoi( value
);
285 else if ( !strcmp( name
, "sample_rate" ) )
286 params
->sample_rate
= atoi( value
);
287 else if ( !strcmp( name
, "channels" ) )
288 params
->channels
= atoi( value
);
289 else if ( !strcmp( name
, "width" ) )
290 params
->width
= atoi( value
);
291 else if ( !strcmp( name
, "height" ) )
292 params
->height
= atoi( value
);
293 else if ( !strcmp( name
, "standard" ) )
295 standard
= strdup( value
);
296 params
->standard
= standard
;
298 else if ( !strcmp( name
, "av" ) )
302 mrl
= strchr( mrl
, '&' );
306 // Now attempt to open the file
307 error
= av_open_input_file( &context
, file
, format
, 0, params
) < 0;
309 // Cleanup AVFormatParameters
313 // If successful, then try to get additional info
316 // Get the stream info
317 error
= av_find_stream_info( context
) < 0;
319 // Continue if no error
322 // We will default to the first audio and video streams found
323 int audio_index
= -1;
324 int video_index
= -1;
327 // Now set properties where we can (use default unknowns if required)
328 if ( context
->duration
!= AV_NOPTS_VALUE
)
330 // This isn't going to be accurate for all formats
331 mlt_position frames
= ( mlt_position
)( ( ( double )context
->duration
/ ( double )AV_TIME_BASE
) * fps
+ 0.5 );
332 mlt_properties_set_position( properties
, "out", frames
- 1 );
333 mlt_properties_set_position( properties
, "length", frames
);
336 // Find default audio and video streams
337 find_default_streams( context
, &audio_index
, &video_index
);
339 if ( context
->start_time
!= AV_NOPTS_VALUE
)
340 mlt_properties_set_double( properties
, "_start_time", context
->start_time
);
342 // Check if we're seekable (something funny about mpeg here :-/)
343 if ( strcmp( file
, "pipe:" ) && strncmp( file
, "http://", 6 ) && strncmp( file
, "udp:", 4 ) && strncmp( file
, "tcp:", 4 ) && strncmp( file
, "rtsp:", 5 ) && strncmp( file
, "rtp:", 4 ) )
345 mlt_properties_set_int( properties
, "seekable", av_seek_frame( context
, -1, mlt_properties_get_double( properties
, "_start_time" ), AVSEEK_FLAG_BACKWARD
) >= 0 );
346 mlt_properties_set_data( properties
, "dummy_context", context
, 0, producer_file_close
, NULL
);
347 av_open_input_file( &context
, file
, NULL
, 0, NULL
);
348 av_find_stream_info( context
);
353 // Store selected audio and video indexes on properties
354 mlt_properties_set_int( properties
, "_audio_index", audio_index
);
355 mlt_properties_set_int( properties
, "_video_index", video_index
);
356 mlt_properties_set_int( properties
, "_last_position", -1 );
358 // Fetch the width, height and aspect ratio
359 if ( video_index
!= -1 )
361 AVCodecContext
*codec_context
= context
->streams
[ video_index
]->codec
;
362 mlt_properties_set_int( properties
, "width", codec_context
->width
);
363 mlt_properties_set_int( properties
, "height", codec_context
->height
);
364 mlt_properties_set_double( properties
, "aspect_ratio",
365 get_aspect_ratio( context
->streams
[ video_index
], codec_context
) );
369 if (context
->title
!= NULL
)
370 mlt_properties_set(properties
, "meta.attr.title.markup", context
->title
);
371 if (context
->author
!= NULL
)
372 mlt_properties_set(properties
, "meta.attr.author.markup", context
->author
);
373 if (context
->copyright
!= NULL
)
374 mlt_properties_set(properties
, "meta.attr.copyright.markup", context
->copyright
);
375 if (context
->comment
!= NULL
)
376 mlt_properties_set(properties
, "meta.attr.comment.markup", context
->comment
);
377 if (context
->album
!= NULL
)
378 mlt_properties_set(properties
, "meta.attr.album.markup", context
->album
);
379 if (context
->year
!= 0)
380 mlt_properties_set_int(properties
, "meta.attr.year.markup", context
->year
);
381 if (context
->track
!= 0)
382 mlt_properties_set_int(properties
, "meta.attr.track.markup", context
->track
);
384 // We're going to cheat here - for a/v files, we will have two contexts (reasoning will be clear later)
385 if ( av
== 0 && audio_index
!= -1 && video_index
!= -1 )
387 // We'll use the open one as our video_context
388 mlt_properties_set_data( properties
, "video_context", context
, 0, producer_file_close
, NULL
);
390 // And open again for our audio context
391 av_open_input_file( &context
, file
, NULL
, 0, NULL
);
392 av_find_stream_info( context
);
395 mlt_properties_set_data( properties
, "audio_context", context
, 0, producer_file_close
, NULL
);
397 else if ( av
!= 2 && video_index
!= -1 )
399 // We only have a video context
400 mlt_properties_set_data( properties
, "video_context", context
, 0, producer_file_close
, NULL
);
402 else if ( audio_index
!= -1 )
404 // We only have an audio context
405 mlt_properties_set_data( properties
, "audio_context", context
, 0, producer_file_close
, NULL
);
409 // Something has gone wrong
413 mlt_properties_set_int( properties
, "av_bypass", av_bypass
);
417 // Unlock the mutex now
423 /** Convert a frame position to a time code.
426 static double producer_time_of_frame( mlt_producer
this, mlt_position position
)
428 return ( double )position
/ mlt_producer_get_fps( this );
431 static inline void convert_image( AVFrame
*frame
, uint8_t *buffer
, int pix_fmt
, mlt_image_format format
, int width
, int height
)
434 if ( format
== mlt_image_yuv420p
)
436 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
437 width
, height
, PIX_FMT_YUV420P
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
439 output
.data
[0] = buffer
;
440 output
.data
[1] = buffer
+ width
* height
;
441 output
.data
[2] = buffer
+ ( 3 * width
* height
) / 2;
442 output
.linesize
[0] = width
;
443 output
.linesize
[1] = width
>> 1;
444 output
.linesize
[2] = width
>> 1;
445 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
446 output
.data
, output
.linesize
);
447 sws_freeContext( context
);
449 else if ( format
== mlt_image_rgb24
)
451 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
452 width
, height
, PIX_FMT_RGB24
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
454 avpicture_fill( &output
, buffer
, PIX_FMT_RGB24
, width
, height
);
455 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
456 output
.data
, output
.linesize
);
457 sws_freeContext( context
);
461 struct SwsContext
*context
= sws_getContext( width
, height
, pix_fmt
,
462 width
, height
, PIX_FMT_YUYV422
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
464 avpicture_fill( &output
, buffer
, PIX_FMT_YUYV422
, width
, height
);
465 sws_scale( context
, frame
->data
, frame
->linesize
, 0, height
,
466 output
.data
, output
.linesize
);
467 sws_freeContext( context
);
470 if ( format
== mlt_image_yuv420p
)
473 pict
.data
[0] = buffer
;
474 pict
.data
[1] = buffer
+ width
* height
;
475 pict
.data
[2] = buffer
+ ( 3 * width
* height
) / 2;
476 pict
.linesize
[0] = width
;
477 pict
.linesize
[1] = width
>> 1;
478 pict
.linesize
[2] = width
>> 1;
479 img_convert( &pict
, PIX_FMT_YUV420P
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
481 else if ( format
== mlt_image_rgb24
)
484 avpicture_fill( &output
, buffer
, PIX_FMT_RGB24
, width
, height
);
485 img_convert( &output
, PIX_FMT_RGB24
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
490 avpicture_fill( &output
, buffer
, PIX_FMT_YUV422
, width
, height
);
491 img_convert( &output
, PIX_FMT_YUV422
, (AVPicture
*)frame
, pix_fmt
, width
, height
);
496 /** Get an image from a frame.
499 static int producer_get_image( mlt_frame frame
, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
501 // Get the properties from the frame
502 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
504 // Obtain the frame number of this frame
505 mlt_position position
= mlt_properties_get_position( frame_properties
, "avformat_position" );
508 mlt_producer
this = mlt_properties_get_data( frame_properties
, "avformat_producer", NULL
);
510 // Get the producer properties
511 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
513 // Fetch the video_context
514 AVFormatContext
*context
= mlt_properties_get_data( properties
, "video_context", NULL
);
516 // Get the video_index
517 int index
= mlt_properties_get_int( properties
, "video_index" );
519 // Obtain the expected frame numer
520 mlt_position expected
= mlt_properties_get_position( properties
, "_video_expected" );
522 // Get the video stream
523 AVStream
*stream
= context
->streams
[ index
];
526 AVCodecContext
*codec_context
= stream
->codec
;
531 // Get the conversion frame
532 AVFrame
*av_frame
= mlt_properties_get_data( properties
, "av_frame", NULL
);
534 // Special case pause handling flag
537 // Special case ffwd handling
540 // We may want to use the source fps if available
541 double source_fps
= mlt_properties_get_double( properties
, "source_fps" );
542 double fps
= mlt_producer_get_fps( this );
544 // This is the physical frame position in the source
545 int req_position
= ( int )( position
/ fps
* source_fps
+ 0.5 );
547 // Get the seekable status
548 int seekable
= mlt_properties_get_int( properties
, "seekable" );
550 // Generate the size in bytes
553 // Hopefully provide better support for streams...
554 int av_bypass
= mlt_properties_get_int( properties
, "av_bypass" );
556 // Determines if we have to decode all frames in a sequence
559 // Set the result arguments that we know here (only *buffer is now required)
560 *width
= codec_context
->width
;
561 *height
= codec_context
->height
;
565 case mlt_image_yuv420p
:
566 size
= *width
* 3 * ( *height
+ 1 ) / 2;
568 case mlt_image_rgb24
:
569 size
= *width
* ( *height
+ 1 ) * 3;
572 *format
= mlt_image_yuv422
;
573 size
= *width
* ( *height
+ 1 ) * 2;
577 // Set this on the frame properties
578 mlt_properties_set_int( frame_properties
, "width", *width
);
579 mlt_properties_set_int( frame_properties
, "height", *height
);
581 // Construct the output image
582 *buffer
= mlt_pool_alloc( size
);
584 // Temporary hack to improve intra frame only
585 must_decode
= strcmp( codec_context
->codec
->name
, "mjpeg" ) &&
586 strcmp( codec_context
->codec
->name
, "rawvideo" ) &&
587 strcmp( codec_context
->codec
->name
, "dvvideo" );
590 if ( position
!= expected
)
592 if ( av_frame
!= NULL
&& position
+ 1 == expected
)
594 // We're paused - use last image
597 else if ( !seekable
&& position
> expected
&& ( position
- expected
) < 250 )
599 // Fast forward - seeking is inefficient for small distances - just ignore following frames
600 ignore
= ( int )( ( position
- expected
) / fps
* source_fps
);
602 else if ( seekable
&& ( position
< expected
|| position
- expected
>= 12 ) )
604 // Calculate the timestamp for the requested frame
605 int64_t timestamp
= ( int64_t )( ( double )req_position
/ source_fps
* AV_TIME_BASE
+ 0.5 );
606 if ( ( uint64_t )context
->start_time
!= AV_NOPTS_VALUE
)
607 timestamp
+= context
->start_time
;
609 timestamp
-= AV_TIME_BASE
;
613 // Set to the timestamp
614 av_seek_frame( context
, -1, timestamp
, AVSEEK_FLAG_BACKWARD
);
616 // Remove the cached info relating to the previous position
617 mlt_properties_set_int( properties
, "_current_position", -1 );
618 mlt_properties_set_int( properties
, "_last_position", -1 );
619 mlt_properties_set_data( properties
, "av_frame", NULL
, 0, NULL
, NULL
);
624 // Duplicate the last image if necessary (see comment on rawvideo below)
625 int current_position
= mlt_properties_get_int( properties
, "_current_position" );
626 int got_picture
= mlt_properties_get_int( properties
, "_got_picture" );
627 if ( av_frame
!= NULL
&& got_picture
&& ( paused
|| current_position
>= req_position
) && av_bypass
== 0 )
630 convert_image( av_frame
, *buffer
, codec_context
->pix_fmt
, *format
, *width
, *height
);
632 // Set this on the frame properties
633 mlt_properties_set_data( frame_properties
, "image", *buffer
, size
, ( mlt_destructor
)mlt_pool_release
, NULL
);
638 int int_position
= 0;
641 av_init_packet( &pkt
);
643 // Construct an AVFrame for YUV422 conversion
644 if ( av_frame
== NULL
)
646 av_frame
= avcodec_alloc_frame( );
647 mlt_properties_set_data( properties
, "av_frame", av_frame
, 0, av_free
, NULL
);
650 while( ret
>= 0 && !got_picture
)
653 ret
= av_read_frame( context
, &pkt
);
655 // We only deal with video from the selected video_index
656 if ( ret
>= 0 && pkt
.stream_index
== index
&& pkt
.size
> 0 )
658 // Determine time code of the packet
659 int_position
= ( int )( av_q2d( stream
->time_base
) * pkt
.dts
* source_fps
+ 0.5 );
660 if ( context
->start_time
!= AV_NOPTS_VALUE
)
661 int_position
-= ( int )( context
->start_time
* source_fps
/ AV_TIME_BASE
+ 0.5 );
662 int last_position
= mlt_properties_get_int( properties
, "_last_position" );
663 if ( int_position
== last_position
)
664 int_position
= last_position
+ 1;
665 mlt_properties_set_int( properties
, "_last_position", int_position
);
668 if ( must_decode
|| int_position
>= req_position
)
669 ret
= avcodec_decode_video( codec_context
, av_frame
, &got_picture
, pkt
.data
, pkt
.size
);
674 if ( int_position
< req_position
)
679 else if ( int_position
>= req_position
)
683 else if ( ignore
-- )
688 av_free_packet( &pkt
);
692 av_free_packet( &pkt
);
695 // Now handle the picture if we have one
698 mlt_properties_set_int( frame_properties
, "progressive", !av_frame
->interlaced_frame
);
699 mlt_properties_set_int( properties
, "top_field_first", av_frame
->top_field_first
);
700 convert_image( av_frame
, *buffer
, codec_context
->pix_fmt
, *format
, *width
, *height
);
701 mlt_properties_set_data( frame_properties
, "image", *buffer
, size
, (mlt_destructor
)mlt_pool_release
, NULL
);
702 mlt_properties_set_int( properties
, "_current_position", int_position
);
703 mlt_properties_set_int( properties
, "_got_picture", 1 );
707 mlt_frame_get_image( frame
, buffer
, format
, width
, height
, writable
);
710 // Very untidy - for rawvideo, the packet contains the frame, hence the free packet
711 // above will break the pause behaviour - so we wipe the frame now
712 if ( !strcmp( codec_context
->codec
->name
, "rawvideo" ) )
713 mlt_properties_set_data( properties
, "av_frame", NULL
, 0, NULL
, NULL
);
715 // Set the field order property for this frame
716 mlt_properties_set_int( frame_properties
, "top_field_first", mlt_properties_get_int( properties
, "top_field_first" ) );
718 // Regardless of speed, we expect to get the next frame (cos we ain't too bright)
719 mlt_properties_set_position( properties
, "_video_expected", position
+ 1 );
724 /** Set up video handling.
727 static void producer_set_up_video( mlt_producer
this, mlt_frame frame
)
729 // Get the properties
730 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
732 // Fetch the video_context
733 AVFormatContext
*context
= mlt_properties_get_data( properties
, "video_context", NULL
);
735 // Get the video_index
736 int index
= mlt_properties_get_int( properties
, "video_index" );
738 // Reopen the file if necessary
739 if ( !context
&& index
> -1 )
741 mlt_events_block( properties
, this );
742 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
743 mlt_properties_get( properties
, "resource" ) );
744 context
= mlt_properties_get_data( properties
, "video_context", NULL
);
745 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
746 mlt_events_unblock( properties
, this );
749 // Exception handling for video_index
750 if ( context
&& index
>= (int) context
->nb_streams
)
752 // Get the last video stream
753 for ( index
= context
->nb_streams
- 1; index
>= 0 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_VIDEO
; --index
);
754 mlt_properties_set_int( properties
, "video_index", index
);
756 if ( context
&& index
> -1 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_VIDEO
)
758 // Invalidate the video stream
760 mlt_properties_set_int( properties
, "video_index", index
);
763 // Get the frame properties
764 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
766 if ( context
&& index
> -1 )
768 // Get the video stream
769 AVStream
*stream
= context
->streams
[ index
];
772 AVCodecContext
*codec_context
= stream
->codec
;
775 AVCodec
*codec
= mlt_properties_get_data( properties
, "video_codec", NULL
);
777 // Update the video properties if the index changed
778 if ( index
!= mlt_properties_get_int( properties
, "_video_index" ) )
780 // Reset the video properties if the index changed
781 mlt_properties_set_int( properties
, "_video_index", index
);
782 mlt_properties_set_data( properties
, "video_codec", NULL
, 0, NULL
, NULL
);
783 mlt_properties_set_int( properties
, "width", codec_context
->width
);
784 mlt_properties_set_int( properties
, "height", codec_context
->height
);
785 mlt_properties_set_double( properties
, "aspect_ratio",
786 get_aspect_ratio( context
->streams
[ index
], codec_context
) );
790 // Initialise the codec if necessary
793 // Initialise multi-threading
794 int thread_count
= mlt_properties_get_int( properties
, "threads" );
795 if ( thread_count
== 0 && getenv( "MLT_AVFORMAT_THREADS" ) )
796 thread_count
= atoi( getenv( "MLT_AVFORMAT_THREADS" ) );
797 if ( thread_count
> 1 )
799 avcodec_thread_init( codec_context
, thread_count
);
800 codec_context
->thread_count
= thread_count
;
804 codec
= avcodec_find_decoder( codec_context
->codec_id
);
806 // If we don't have a codec and we can't initialise it, we can't do much more...
808 if ( codec
!= NULL
&& avcodec_open( codec_context
, codec
) >= 0 )
810 // Now store the codec with its destructor
811 mlt_properties_set_data( properties
, "video_codec", codec_context
, 0, producer_codec_close
, NULL
);
815 // Remember that we can't use this later
816 mlt_properties_set_int( properties
, "video_index", -1 );
821 // No codec, no show...
824 double source_fps
= 0;
825 double force_aspect_ratio
= mlt_properties_get_double( properties
, "force_aspect_ratio" );
826 double aspect_ratio
= ( force_aspect_ratio
> 0.0 ) ?
827 force_aspect_ratio
: get_aspect_ratio( stream
, codec_context
);
830 source_fps
= ( double )codec_context
->time_base
.den
/ ( codec_context
->time_base
.num
== 0 ?
1 : codec_context
->time_base
.num
);
832 // We'll use fps if it's available
833 if ( source_fps
> 0 )
834 mlt_properties_set_double( properties
, "source_fps", source_fps
);
836 mlt_properties_set_double( properties
, "source_fps", mlt_producer_get_fps( this ) );
837 mlt_properties_set_double( properties
, "aspect_ratio", aspect_ratio
);
839 // Set the width and height
840 mlt_properties_set_int( frame_properties
, "width", codec_context
->width
);
841 mlt_properties_set_int( frame_properties
, "height", codec_context
->height
);
842 mlt_properties_set_double( frame_properties
, "aspect_ratio", aspect_ratio
);
844 mlt_frame_push_get_image( frame
, producer_get_image
);
845 mlt_properties_set_data( frame_properties
, "avformat_producer", this, 0, NULL
, NULL
);
849 mlt_properties_set_int( frame_properties
, "test_image", 1 );
854 mlt_properties_set_int( frame_properties
, "test_image", 1 );
858 /** Get the audio from a frame.
861 static int producer_get_audio( mlt_frame frame
, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
863 // Get the properties from the frame
864 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
866 // Obtain the frame number of this frame
867 mlt_position position
= mlt_properties_get_position( frame_properties
, "avformat_position" );
870 mlt_producer
this = mlt_properties_get_data( frame_properties
, "avformat_producer", NULL
);
872 // Get the producer properties
873 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
875 // Fetch the audio_context
876 AVFormatContext
*context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
878 // Get the audio_index
879 int index
= mlt_properties_get_int( properties
, "audio_index" );
881 // Get the seekable status
882 int seekable
= mlt_properties_get_int( properties
, "seekable" );
884 // Obtain the expected frame numer
885 mlt_position expected
= mlt_properties_get_position( properties
, "_audio_expected" );
887 // Obtain the resample context if it exists (not always needed)
888 ReSampleContext
*resample
= mlt_properties_get_data( properties
, "audio_resample", NULL
);
890 // Obtain the audio buffer
891 int16_t *audio_buffer
= mlt_properties_get_data( properties
, "audio_buffer", NULL
);
893 // Get amount of audio used
894 int audio_used
= mlt_properties_get_int( properties
, "_audio_used" );
896 // Calculate the real time code
897 double real_timecode
= producer_time_of_frame( this, position
);
899 // Get the audio stream
900 AVStream
*stream
= context
->streams
[ index
];
903 AVCodecContext
*codec_context
= stream
->codec
;
908 // Number of frames to ignore (for ffwd)
911 // Flag for paused (silence)
914 // Check for resample and create if necessary
915 if ( resample
== NULL
&& codec_context
->channels
<= 2 )
917 // Create the resampler
918 resample
= audio_resample_init( *channels
, codec_context
->channels
, *frequency
, codec_context
->sample_rate
);
920 // And store it on properties
921 mlt_properties_set_data( properties
, "audio_resample", resample
, 0, ( mlt_destructor
)audio_resample_close
, NULL
);
923 else if ( resample
== NULL
)
925 *channels
= codec_context
->channels
;
926 *frequency
= codec_context
->sample_rate
;
929 // Check for audio buffer and create if necessary
930 if ( audio_buffer
== NULL
)
932 // Allocate the audio buffer
933 audio_buffer
= mlt_pool_alloc( AVCODEC_MAX_AUDIO_FRAME_SIZE
* sizeof( int16_t ) );
935 // And store it on properties for reuse
936 mlt_properties_set_data( properties
, "audio_buffer", audio_buffer
, 0, ( mlt_destructor
)mlt_pool_release
, NULL
);
940 if ( position
!= expected
)
942 if ( position
+ 1 == expected
)
944 // We're paused - silence required
947 else if ( !seekable
&& position
> expected
&& ( position
- expected
) < 250 )
949 // Fast forward - seeking is inefficient for small distances - just ignore following frames
950 ignore
= position
- expected
;
952 else if ( position
< expected
|| position
- expected
>= 12 )
954 // Set to the real timecode
955 if ( av_seek_frame( context
, -1, mlt_properties_get_double( properties
, "_start_time" ) + real_timecode
* 1000000.0, AVSEEK_FLAG_BACKWARD
) != 0 )
958 // Clear the usage in the audio buffer
963 // Get the audio if required
968 int16_t *temp
= av_malloc( sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE
);
970 av_init_packet( &pkt
);
972 while( ret
>= 0 && !got_audio
)
974 // Check if the buffer already contains the samples required
975 if ( audio_used
>= *samples
&& ignore
== 0 )
982 ret
= av_read_frame( context
, &pkt
);
985 uint8_t *ptr
= pkt
.data
;
987 // We only deal with audio from the selected audio_index
988 while ( ptr
!= NULL
&& ret
>= 0 && pkt
.stream_index
== index
&& len
> 0 )
990 int data_size
= sizeof( int16_t ) * AVCODEC_MAX_AUDIO_FRAME_SIZE
;
993 #if (LIBAVCODEC_VERSION_INT >= ((51<<16)+(29<<8)+0))
994 ret
= avcodec_decode_audio2( codec_context
, temp
, &data_size
, ptr
, len
);
996 ret
= avcodec_decode_audio( codec_context
, temp
, &data_size
, ptr
, len
);
1007 if ( data_size
> 0 )
1009 if ( resample
!= NULL
)
1011 audio_used
+= audio_resample( resample
, &audio_buffer
[ audio_used
* *channels
], temp
, data_size
/ ( codec_context
->channels
* sizeof( int16_t ) ) );
1015 memcpy( &audio_buffer
[ audio_used
* *channels
], temp
, data_size
);
1016 audio_used
+= data_size
/ ( codec_context
->channels
* sizeof( int16_t ) );
1020 while ( ignore
&& audio_used
> *samples
)
1023 audio_used
-= *samples
;
1024 memmove( audio_buffer
, &audio_buffer
[ *samples
* *channels
], audio_used
* sizeof( int16_t ) );
1028 // If we're behind, ignore this packet
1031 float current_pts
= av_q2d( stream
->time_base
) * pkt
.pts
;
1032 if ( seekable
&& ( !ignore
&& current_pts
<= ( real_timecode
- 0.02 ) ) )
1037 // We're finished with this packet regardless
1038 av_free_packet( &pkt
);
1041 *buffer
= mlt_pool_alloc( *samples
* *channels
* sizeof( int16_t ) );
1042 mlt_properties_set_data( frame_properties
, "audio", *buffer
, 0, ( mlt_destructor
)mlt_pool_release
, NULL
);
1044 // Now handle the audio if we have enough
1045 if ( audio_used
>= *samples
)
1047 memcpy( *buffer
, audio_buffer
, *samples
* *channels
* sizeof( int16_t ) );
1048 audio_used
-= *samples
;
1049 memmove( audio_buffer
, &audio_buffer
[ *samples
* *channels
], audio_used
* *channels
* sizeof( int16_t ) );
1053 memset( *buffer
, 0, *samples
* *channels
* sizeof( int16_t ) );
1056 // Store the number of audio samples still available
1057 mlt_properties_set_int( properties
, "_audio_used", audio_used
);
1059 // Release the temporary audio
1064 // Get silence and don't touch the context
1065 mlt_frame_get_audio( frame
, buffer
, format
, frequency
, channels
, samples
);
1068 // Regardless of speed (other than paused), we expect to get the next frame
1070 mlt_properties_set_position( properties
, "_audio_expected", position
+ 1 );
1075 /** Set up audio handling.
1078 static void producer_set_up_audio( mlt_producer
this, mlt_frame frame
)
1080 // Get the properties
1081 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( this );
1083 // Fetch the audio_context
1084 AVFormatContext
*context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
1086 // Get the audio_index
1087 int index
= mlt_properties_get_int( properties
, "audio_index" );
1089 // Reopen the file if necessary
1090 if ( !context
&& index
> -1 )
1092 mlt_events_block( properties
, this );
1093 producer_open( this, mlt_service_profile( MLT_PRODUCER_SERVICE(this) ),
1094 mlt_properties_get( properties
, "resource" ) );
1095 context
= mlt_properties_get_data( properties
, "audio_context", NULL
);
1096 mlt_properties_set_data( properties
, "dummy_context", NULL
, 0, NULL
, NULL
);
1097 mlt_events_unblock( properties
, this );
1100 // Exception handling for audio_index
1101 if ( context
&& index
>= (int) context
->nb_streams
)
1103 for ( index
= context
->nb_streams
- 1; index
>= 0 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_AUDIO
; --index
);
1104 mlt_properties_set_int( properties
, "audio_index", index
);
1106 if ( context
&& index
> -1 && context
->streams
[ index
]->codec
->codec_type
!= CODEC_TYPE_AUDIO
)
1109 mlt_properties_set_int( properties
, "audio_index", index
);
1112 // Update the audio properties if the index changed
1113 if ( index
> -1 && index
!= mlt_properties_get_int( properties
, "_audio_index" ) ) {
1114 mlt_properties_set_int( properties
, "_audio_index", index
);
1115 mlt_properties_set_data( properties
, "audio_codec", NULL
, 0, NULL
, NULL
);
1118 // Deal with audio context
1119 if ( context
!= NULL
&& index
> -1 )
1121 // Get the frame properties
1122 mlt_properties frame_properties
= MLT_FRAME_PROPERTIES( frame
);
1124 // Get the audio stream
1125 AVStream
*stream
= context
->streams
[ index
];
1127 // Get codec context
1128 AVCodecContext
*codec_context
= stream
->codec
;
1131 AVCodec
*codec
= mlt_properties_get_data( properties
, "audio_codec", NULL
);
1133 // Initialise the codec if necessary
1134 if ( codec
== NULL
)
1137 codec
= avcodec_find_decoder( codec_context
->codec_id
);
1139 // If we don't have a codec and we can't initialise it, we can't do much more...
1141 if ( codec
!= NULL
&& avcodec_open( codec_context
, codec
) >= 0 )
1143 // Now store the codec with its destructor
1144 mlt_properties_set_data( properties
, "audio_codec", codec_context
, 0, producer_codec_close
, NULL
);
1149 // Remember that we can't use this later
1150 mlt_properties_set_int( properties
, "audio_index", -1 );
1155 // No codec, no show...
1156 if ( codec
!= NULL
)
1158 mlt_frame_push_audio( frame
, producer_get_audio
);
1159 mlt_properties_set_data( frame_properties
, "avformat_producer", this, 0, NULL
, NULL
);
1160 mlt_properties_set_int( frame_properties
, "frequency", codec_context
->sample_rate
);
1161 mlt_properties_set_int( frame_properties
, "channels", codec_context
->channels
);
1166 /** Our get frame implementation.
1169 static int producer_get_frame( mlt_producer
this, mlt_frame_ptr frame
, int index
)
1171 // Create an empty frame
1172 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( this ) );
1174 // Update timecode on the frame we're creating
1175 mlt_frame_set_position( *frame
, mlt_producer_position( this ) );
1177 // Set the position of this producer
1178 mlt_properties_set_position( MLT_FRAME_PROPERTIES( *frame
), "avformat_position", mlt_producer_frame( this ) );
1181 producer_set_up_video( this, *frame
);
1184 producer_set_up_audio( this, *frame
);
1186 // Set the aspect_ratio
1187 mlt_properties_set_double( MLT_FRAME_PROPERTIES( *frame
), "aspect_ratio", mlt_properties_get_double( MLT_PRODUCER_PROPERTIES( this ), "aspect_ratio" ) );
1189 // Calculate the next timecode
1190 mlt_producer_prepare_next( this );