2 * consumer_avformat.c -- an encoder based on avformat
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "consumer_avformat.h"
25 #include <framework/mlt_frame.h>
27 // System header files
36 // avformat header files
43 // This structure should be extended and made globally available in mlt
55 *sample_fifo
, sample_fifo_s
;
57 sample_fifo
sample_fifo_init( int frequency
, int channels
)
59 sample_fifo
this = calloc( 1, sizeof( sample_fifo_s
) );
60 this->frequency
= frequency
;
61 this->channels
= channels
;
65 // sample_fifo_clear and check are temporarily aborted (not working as intended)
67 void sample_fifo_clear( sample_fifo
this, double time
)
69 int words
= ( float )( time
- this->time
) * this->frequency
* this->channels
;
70 if ( ( int )( ( float )time
* 100 ) < ( int )( ( float )this->time
* 100 ) && this->used
> words
&& words
> 0 )
72 memmove( this->buffer
, &this->buffer
[ words
], ( this->used
- words
) * sizeof( int16_t ) );
76 else if ( ( int )( ( float )time
* 100 ) != ( int )( ( float )this->time
* 100 ) )
83 void sample_fifo_check( sample_fifo
this, double time
)
85 if ( this->used
== 0 )
87 if ( ( int )( ( float )time
* 100 ) < ( int )( ( float )this->time
* 100 ) )
92 void sample_fifo_append( sample_fifo
this, int16_t *samples
, int count
)
94 if ( ( this->size
- this->used
) < count
)
96 this->size
+= count
* 5;
97 this->buffer
= realloc( this->buffer
, this->size
* sizeof( int16_t ) );
100 memcpy( &this->buffer
[ this->used
], samples
, count
* sizeof( int16_t ) );
104 int sample_fifo_used( sample_fifo
this )
109 int sample_fifo_fetch( sample_fifo
this, int16_t *samples
, int count
)
111 if ( count
> this->used
)
114 memcpy( samples
, this->buffer
, count
* sizeof( int16_t ) );
116 memmove( this->buffer
, &this->buffer
[ count
], this->used
* sizeof( int16_t ) );
118 this->time
+= ( double )count
/ this->channels
/ this->frequency
;
123 void sample_fifo_close( sample_fifo
this )
125 free( this->buffer
);
129 // Forward references.
130 static int consumer_start( mlt_consumer
this );
131 static int consumer_stop( mlt_consumer
this );
132 static int consumer_is_stopped( mlt_consumer
this );
133 static void *consumer_thread( void *arg
);
134 static void consumer_close( mlt_consumer
this );
136 /** Initialise the dv consumer.
139 mlt_consumer
consumer_avformat_init( char *arg
)
141 // Allocate the consumer
142 mlt_consumer
this = mlt_consumer_new( );
144 // If memory allocated and initialises without error
147 // Get properties from the consumer
148 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
150 // Assign close callback
151 this->close
= consumer_close
;
153 // Interpret the argument
155 mlt_properties_set( properties
, "target", arg
);
157 // sample and frame queue
158 mlt_properties_set_data( properties
, "frame_queue", mlt_deque_init( ), 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
160 // Set avformat defaults (all lifted from ffmpeg.c)
161 mlt_properties_set_int( properties
, "audio_bit_rate", 128000 );
162 mlt_properties_set_int( properties
, "video_bit_rate", 200 * 1000 );
163 mlt_properties_set_int( properties
, "video_bit_rate_tolerance", 4000 * 1000 );
164 mlt_properties_set_int( properties
, "gop_size", 12 );
165 mlt_properties_set_int( properties
, "b_frames", 0 );
166 mlt_properties_set_int( properties
, "mb_decision", FF_MB_DECISION_SIMPLE
);
167 mlt_properties_set_double( properties
, "qscale", 1 );
168 mlt_properties_set_int( properties
, "me_method", ME_EPZS
);
169 mlt_properties_set_int( properties
, "mb_cmp", FF_CMP_SAD
);
170 mlt_properties_set_int( properties
, "ildct_cmp", FF_CMP_VSAD
);
171 mlt_properties_set_int( properties
, "sub_cmp", FF_CMP_SAD
);
172 mlt_properties_set_int( properties
, "cmp", FF_CMP_SAD
);
173 mlt_properties_set_int( properties
, "pre_cmp", FF_CMP_SAD
);
174 mlt_properties_set_int( properties
, "pre_me", 0 );
175 mlt_properties_set_double( properties
, "lumi_mask", 0 );
176 mlt_properties_set_double( properties
, "dark_mask", 0 );
177 mlt_properties_set_double( properties
, "scplx_mask", 0 );
178 mlt_properties_set_double( properties
, "tcplx_mask", 0 );
179 mlt_properties_set_double( properties
, "p_mask", 0 );
180 mlt_properties_set_int( properties
, "qns", 0 );
181 mlt_properties_set_int( properties
, "video_qmin", 2 );
182 mlt_properties_set_int( properties
, "video_qmax", 31 );
183 mlt_properties_set_int( properties
, "video_lmin", 2*FF_QP2LAMBDA
);
184 mlt_properties_set_int( properties
, "video_lmax", 31*FF_QP2LAMBDA
);
185 mlt_properties_set_int( properties
, "video_mb_qmin", 2 );
186 mlt_properties_set_int( properties
, "video_mb_qmax", 31 );
187 mlt_properties_set_int( properties
, "video_qdiff", 3 );
188 mlt_properties_set_double( properties
, "video_qblur", 0.5 );
189 mlt_properties_set_double( properties
, "video_qcomp", 0.5 );
190 mlt_properties_set_int( properties
, "video_rc_max_rate", 0 );
191 mlt_properties_set_int( properties
, "video_rc_min_rate", 0 );
192 mlt_properties_set_int( properties
, "video_rc_buffer_size", 0 );
193 mlt_properties_set_double( properties
, "video_rc_buffer_aggressivity", 1.0 );
194 mlt_properties_set_double( properties
, "video_rc_initial_cplx", 0 );
195 mlt_properties_set_double( properties
, "video_i_qfactor", 1.25 );
196 mlt_properties_set_double( properties
, "video_b_qfactor", 1.25 );
197 mlt_properties_set_double( properties
, "video_i_qoffset", -0.8 );
198 mlt_properties_set_double( properties
, "video_b_qoffset", 0 );
199 mlt_properties_set_int( properties
, "video_intra_quant_bias", FF_DEFAULT_QUANT_BIAS
);
200 mlt_properties_set_int( properties
, "video_inter_quant_bias", FF_DEFAULT_QUANT_BIAS
);
201 mlt_properties_set_int( properties
, "dct_algo", 0 );
202 mlt_properties_set_int( properties
, "idct_algo", 0 );
203 mlt_properties_set_int( properties
, "me_threshold", 0 );
204 mlt_properties_set_int( properties
, "mb_threshold", 0 );
205 mlt_properties_set_int( properties
, "intra_dc_precision", 0 );
206 mlt_properties_set_int( properties
, "strict", 0 );
207 mlt_properties_set_int( properties
, "error_rate", 0 );
208 mlt_properties_set_int( properties
, "noise_reduction", 0 );
209 mlt_properties_set_int( properties
, "sc_threshold", 0 );
210 mlt_properties_set_int( properties
, "me_range", 0 );
211 mlt_properties_set_int( properties
, "coder", 0 );
212 mlt_properties_set_int( properties
, "context", 0 );
213 mlt_properties_set_int( properties
, "predictor", 0 );
215 // Ensure termination at end of the stream
216 mlt_properties_set_int( properties
, "terminate_on_pause", 1 );
218 // Set up start/stop/terminated callbacks
219 this->start
= consumer_start
;
220 this->stop
= consumer_stop
;
221 this->is_stopped
= consumer_is_stopped
;
228 /** Start the consumer.
231 static int consumer_start( mlt_consumer
this )
233 // Get the properties
234 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
236 // Check that we're not already running
237 if ( !mlt_properties_get_int( properties
, "running" ) )
240 pthread_t
*thread
= calloc( 1, sizeof( pthread_t
) );
242 // Get the width and height
243 int width
= mlt_properties_get_int( properties
, "width" );
244 int height
= mlt_properties_get_int( properties
, "height" );
246 // Obtain the size property
247 char *size
= mlt_properties_get( properties
, "size" );
253 if ( sscanf( size
, "%dx%d", &tw
, &th
) == 2 && tw
> 0 && th
> 0 )
260 fprintf( stderr
, "consumer_avformat: Invalid size property %s - ignoring.\n", size
);
264 // Now ensure we honour the multiple of two requested by libavformat
265 mlt_properties_set_int( properties
, "width", ( width
/ 2 ) * 2 );
266 mlt_properties_set_int( properties
, "height", ( height
/ 2 ) * 2 );
268 // Assign the thread to properties
269 mlt_properties_set_data( properties
, "thread", thread
, sizeof( pthread_t
), free
, NULL
);
271 // Set the running state
272 mlt_properties_set_int( properties
, "running", 1 );
275 pthread_create( thread
, NULL
, consumer_thread
, this );
280 /** Stop the consumer.
283 static int consumer_stop( mlt_consumer
this )
285 // Get the properties
286 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
288 // Check that we're running
289 if ( mlt_properties_get_int( properties
, "running" ) )
292 pthread_t
*thread
= mlt_properties_get_data( properties
, "thread", NULL
);
295 mlt_properties_set_int( properties
, "running", 0 );
297 // Wait for termination
298 pthread_join( *thread
, NULL
);
304 /** Determine if the consumer is stopped.
307 static int consumer_is_stopped( mlt_consumer
this )
309 // Get the properties
310 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
311 return !mlt_properties_get_int( properties
, "running" );
314 /** Add an audio output stream
317 static AVStream
*add_audio_stream( mlt_consumer
this, AVFormatContext
*oc
, int codec_id
)
319 // Get the properties
320 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
322 // Create a new stream
323 AVStream
*st
= av_new_stream( oc
, 1 );
325 // If created, then initialise from properties
328 AVCodecContext
*c
= st
->codec
;
329 c
->codec_id
= codec_id
;
330 c
->codec_type
= CODEC_TYPE_AUDIO
;
332 // Put sample parameters
333 c
->bit_rate
= mlt_properties_get_int( properties
, "audio_bit_rate" );
334 c
->sample_rate
= mlt_properties_get_int( properties
, "frequency" );
335 c
->channels
= mlt_properties_get_int( properties
, "channels" );
337 if (oc
->oformat
->flags
& AVFMT_GLOBALHEADER
)
338 c
->flags
|= CODEC_FLAG_GLOBAL_HEADER
;
340 // Allow the user to override the audio fourcc
341 if ( mlt_properties_get( properties
, "afourcc" ) )
344 char *arg
= mlt_properties_get( properties
, "afourcc" );
345 int tag
= strtol( arg
, &tail
, 0);
347 tag
= arg
[ 0 ] + ( arg
[ 1 ] << 8 ) + ( arg
[ 2 ] << 16 ) + ( arg
[ 3 ] << 24 );
353 fprintf( stderr
, "Could not allocate a stream for audio\n" );
359 static int open_audio( AVFormatContext
*oc
, AVStream
*st
, int audio_outbuf_size
)
361 // We will return the audio input size from here
362 int audio_input_frame_size
= 0;
365 AVCodecContext
*c
= st
->codec
;
368 AVCodec
*codec
= avcodec_find_encoder( c
->codec_id
);
370 // Continue if codec found and we can open it
371 if ( codec
!= NULL
&& avcodec_open(c
, codec
) >= 0 )
373 // ugly hack for PCM codecs (will be removed ASAP with new PCM
374 // support to compute the input frame size in samples
375 if ( c
->frame_size
<= 1 )
377 audio_input_frame_size
= audio_outbuf_size
/ c
->channels
;
378 switch(st
->codec
->codec_id
)
380 case CODEC_ID_PCM_S16LE
:
381 case CODEC_ID_PCM_S16BE
:
382 case CODEC_ID_PCM_U16LE
:
383 case CODEC_ID_PCM_U16BE
:
384 audio_input_frame_size
>>= 1;
392 audio_input_frame_size
= c
->frame_size
;
395 // Some formats want stream headers to be seperate (hmm)
396 if( !strcmp( oc
->oformat
->name
, "mp4" ) ||
397 !strcmp( oc
->oformat
->name
, "mov" ) ||
398 !strcmp( oc
->oformat
->name
, "3gp" ) )
399 c
->flags
|= CODEC_FLAG_GLOBAL_HEADER
;
403 fprintf( stderr
, "Unable to encode audio - disabling audio output.\n" );
406 return audio_input_frame_size
;
409 static void close_audio( AVFormatContext
*oc
, AVStream
*st
)
411 avcodec_close( st
->codec
);
414 /** Add a video output stream
417 static AVStream
*add_video_stream( mlt_consumer
this, AVFormatContext
*oc
, int codec_id
)
419 // Get the properties
420 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
422 // Create a new stream
423 AVStream
*st
= av_new_stream( oc
, 0 );
427 char *pix_fmt
= mlt_properties_get( properties
, "pix_fmt" );
428 double ar
= mlt_properties_get_double( properties
, "display_ratio" );
429 AVCodecContext
*c
= st
->codec
;
430 c
->codec_id
= codec_id
;
431 c
->codec_type
= CODEC_TYPE_VIDEO
;
433 // put sample parameters
434 c
->bit_rate
= mlt_properties_get_int( properties
, "video_bit_rate" );
435 c
->bit_rate_tolerance
= mlt_properties_get_int( properties
, "video_bit_rate_tolerance" );
436 c
->width
= mlt_properties_get_int( properties
, "width" );
437 c
->height
= mlt_properties_get_int( properties
, "height" );
438 c
->time_base
.num
= mlt_properties_get_int( properties
, "frame_rate_den" );
439 c
->time_base
.den
= mlt_properties_get_int( properties
, "frame_rate_num" );
440 c
->gop_size
= mlt_properties_get_int( properties
, "gop_size" );
441 c
->pix_fmt
= pix_fmt ?
avcodec_get_pix_fmt( pix_fmt
) : PIX_FMT_YUV420P
;
443 if ( mlt_properties_get_int( properties
, "b_frames" ) )
445 c
->max_b_frames
= mlt_properties_get_int( properties
, "b_frames" );
446 c
->b_frame_strategy
= 0;
447 c
->b_quant_factor
= 2.0;
450 c
->mb_decision
= mlt_properties_get_int( properties
, "mb_decision" );
451 c
->sample_aspect_ratio
= av_d2q( ar
* c
->height
/ c
->width
, 255);
452 c
->mb_cmp
= mlt_properties_get_int( properties
, "mb_cmp" );
453 c
->ildct_cmp
= mlt_properties_get_int( properties
, "ildct_cmp" );
454 c
->me_sub_cmp
= mlt_properties_get_int( properties
, "sub_cmp" );
455 c
->me_cmp
= mlt_properties_get_int( properties
, "cmp" );
456 c
->me_pre_cmp
= mlt_properties_get_int( properties
, "pre_cmp" );
457 c
->pre_me
= mlt_properties_get_int( properties
, "pre_me" );
458 c
->lumi_masking
= mlt_properties_get_double( properties
, "lumi_mask" );
459 c
->dark_masking
= mlt_properties_get_double( properties
, "dark_mask" );
460 c
->spatial_cplx_masking
= mlt_properties_get_double( properties
, "scplx_mask" );
461 c
->temporal_cplx_masking
= mlt_properties_get_double( properties
, "tcplx_mask" );
462 c
->p_masking
= mlt_properties_get_double( properties
, "p_mask" );
463 c
->quantizer_noise_shaping
= mlt_properties_get_int( properties
, "qns" );
464 c
->qmin
= mlt_properties_get_int( properties
, "video_qmin" );
465 c
->qmax
= mlt_properties_get_int( properties
, "video_qmax" );
466 c
->lmin
= mlt_properties_get_int( properties
, "video_lmin" );
467 c
->lmax
= mlt_properties_get_int( properties
, "video_lmax" );
468 c
->mb_qmin
= mlt_properties_get_int( properties
, "video_mb_qmin" );
469 c
->mb_qmax
= mlt_properties_get_int( properties
, "video_mb_qmax" );
470 c
->max_qdiff
= mlt_properties_get_int( properties
, "video_qdiff" );
471 c
->qblur
= mlt_properties_get_double( properties
, "video_qblur" );
472 c
->qcompress
= mlt_properties_get_double( properties
, "video_qcomp" );
474 if ( mlt_properties_get_double( properties
, "qscale" ) > 0 )
476 c
->flags
|= CODEC_FLAG_QSCALE
;
477 st
->quality
= FF_QP2LAMBDA
* mlt_properties_get_double( properties
, "qscale" );
480 // Allow the user to override the video fourcc
481 if ( mlt_properties_get( properties
, "vfourcc" ) )
484 const char *arg
= mlt_properties_get( properties
, "vfourcc" );
485 int tag
= strtol( arg
, &tail
, 0);
487 tag
= arg
[ 0 ] + ( arg
[ 1 ] << 8 ) + ( arg
[ 2 ] << 16 ) + ( arg
[ 3 ] << 24 );
491 // Some formats want stream headers to be seperate
492 if ( oc
->oformat
->flags
& AVFMT_GLOBALHEADER
)
493 c
->flags
|= CODEC_FLAG_GLOBAL_HEADER
;
495 c
->rc_max_rate
= mlt_properties_get_int( properties
, "video_rc_max_rate" );
496 c
->rc_min_rate
= mlt_properties_get_int( properties
, "video_rc_min_rate" );
497 c
->rc_buffer_size
= mlt_properties_get_int( properties
, "video_rc_buffer_size" );
498 c
->rc_buffer_aggressivity
= mlt_properties_get_double( properties
, "video_rc_buffer_aggressivity" );
499 c
->rc_initial_cplx
= mlt_properties_get_double( properties
, "video_rc_initial_cplx" );
500 c
->i_quant_factor
= mlt_properties_get_double( properties
, "video_i_qfactor" );
501 c
->b_quant_factor
= mlt_properties_get_double( properties
, "video_b_qfactor" );
502 c
->i_quant_offset
= mlt_properties_get_double( properties
, "video_i_qoffset" );
503 c
->b_quant_offset
= mlt_properties_get_double( properties
, "video_b_qoffset" );
504 c
->intra_quant_bias
= mlt_properties_get_int( properties
, "video_intra_quant_bias" );
505 c
->inter_quant_bias
= mlt_properties_get_int( properties
, "video_inter_quant_bias" );
506 c
->dct_algo
= mlt_properties_get_int( properties
, "dct_algo" );
507 c
->idct_algo
= mlt_properties_get_int( properties
, "idct_algo" );
508 c
->me_threshold
= mlt_properties_get_int( properties
, "me_threshold" );
509 c
->mb_threshold
= mlt_properties_get_int( properties
, "mb_threshold" );
510 c
->intra_dc_precision
= mlt_properties_get_int( properties
, "intra_dc_precision" );
511 c
->strict_std_compliance
= mlt_properties_get_int( properties
, "strict" );
512 c
->error_rate
= mlt_properties_get_int( properties
, "error_rate" );
513 c
->noise_reduction
= mlt_properties_get_int( properties
, "noise_reduction" );
514 c
->scenechange_threshold
= mlt_properties_get_int( properties
, "sc_threshold" );
515 c
->me_range
= mlt_properties_get_int( properties
, "me_range" );
516 c
->coder_type
= mlt_properties_get_int( properties
, "coder" );
517 c
->context_model
= mlt_properties_get_int( properties
, "context" );
518 c
->prediction_method
= mlt_properties_get_int( properties
, "predictor" );
519 c
->me_method
= mlt_properties_get_int( properties
, "me_method" );
523 fprintf( stderr
, "Could not allocate a stream for video\n" );
529 static AVFrame
*alloc_picture( int pix_fmt
, int width
, int height
)
532 AVFrame
*picture
= avcodec_alloc_frame();
534 // Determine size of the
535 int size
= avpicture_get_size(pix_fmt
, width
, height
);
537 // Allocate the picture buf
538 uint8_t *picture_buf
= av_malloc(size
);
540 // If we have both, then fill the image
541 if ( picture
!= NULL
&& picture_buf
!= NULL
)
543 // Fill the frame with the allocated buffer
544 avpicture_fill( (AVPicture
*)picture
, picture_buf
, pix_fmt
, width
, height
);
548 // Something failed - clean up what we can
550 av_free( picture_buf
);
557 static int open_video(AVFormatContext
*oc
, AVStream
*st
)
560 AVCodecContext
*video_enc
= st
->codec
;
562 // find the video encoder
563 AVCodec
*codec
= avcodec_find_encoder( video_enc
->codec_id
);
565 if( codec
&& codec
->pix_fmts
)
567 const enum PixelFormat
*p
= codec
->pix_fmts
;
570 if( *p
== video_enc
->pix_fmt
)
574 video_enc
->pix_fmt
= codec
->pix_fmts
[ 0 ];
577 // Open the codec safely
578 return codec
!= NULL
&& avcodec_open( video_enc
, codec
) >= 0;
581 void close_video(AVFormatContext
*oc
, AVStream
*st
)
583 avcodec_close(st
->codec
);
586 static inline long time_difference( struct timeval
*time1
)
588 struct timeval time2
;
589 gettimeofday( &time2
, NULL
);
590 return time2
.tv_sec
* 1000000 + time2
.tv_usec
- time1
->tv_sec
* 1000000 - time1
->tv_usec
;
593 /** The main thread - the argument is simply the consumer.
596 static void *consumer_thread( void *arg
)
598 // Map the argument to the object
599 mlt_consumer
this = arg
;
601 // Get the properties
602 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
604 // Get the terminate on pause property
605 int terminate_on_pause
= mlt_properties_get_int( properties
, "terminate_on_pause" );
608 // Determine if feed is slow (for realtime stuff)
609 int real_time_output
= mlt_properties_get_int( properties
, "real_time" );
614 // Get the frame rate
615 int fps
= mlt_properties_get_double( properties
, "fps" );
617 // Get width and height
618 int width
= mlt_properties_get_int( properties
, "width" );
619 int height
= mlt_properties_get_int( properties
, "height" );
620 int img_width
= width
;
621 int img_height
= height
;
623 // Get default audio properties
624 mlt_audio_format aud_fmt
= mlt_audio_pcm
;
625 int channels
= mlt_properties_get_int( properties
, "channels" );
626 int frequency
= mlt_properties_get_int( properties
, "frequency" );
630 // AVFormat audio buffer and frame size
631 int audio_outbuf_size
= 10000;
632 uint8_t *audio_outbuf
= av_malloc( audio_outbuf_size
);
633 int audio_input_frame_size
= 0;
635 // AVFormat video buffer and frame count
637 int video_outbuf_size
= ( 1024 * 1024 );
638 uint8_t *video_outbuf
= av_malloc( video_outbuf_size
);
640 // Used for the frame properties
641 mlt_frame frame
= NULL
;
642 mlt_properties frame_properties
= NULL
;
645 mlt_deque queue
= mlt_properties_get_data( properties
, "frame_queue", NULL
);
646 sample_fifo fifo
= mlt_properties_get_data( properties
, "sample_fifo", NULL
);
648 // Need two av pictures for converting
649 AVFrame
*output
= NULL
;
650 AVFrame
*input
= alloc_picture( PIX_FMT_YUV422
, width
, height
);
652 // For receiving images from an mlt_frame
654 mlt_image_format img_fmt
= mlt_image_yuv422
;
656 // For receiving audio samples back from the fifo
657 int16_t *buffer
= av_malloc( 48000 * 2 );
660 // Allocate the context
661 AVFormatContext
*oc
= av_alloc_format_context( );
664 AVStream
*audio_st
= NULL
;
665 AVStream
*video_st
= NULL
;
668 double audio_pts
= 0;
669 double video_pts
= 0;
676 long int total_time
= 0;
678 // Determine the format
679 AVOutputFormat
*fmt
= NULL
;
680 char *filename
= mlt_properties_get( properties
, "target" );
681 char *format
= mlt_properties_get( properties
, "format" );
682 char *vcodec
= mlt_properties_get( properties
, "vcodec" );
683 char *acodec
= mlt_properties_get( properties
, "acodec" );
685 // Used to store and override codec ids
689 // Check for user selected format first
690 if ( format
!= NULL
)
691 fmt
= guess_format( format
, NULL
, NULL
);
693 // Otherwise check on the filename
694 if ( fmt
== NULL
&& filename
!= NULL
)
695 fmt
= guess_format( NULL
, filename
, NULL
);
697 // Otherwise default to mpeg
699 fmt
= guess_format( "mpeg", NULL
, NULL
);
701 // We need a filename - default to stdout?
702 if ( filename
== NULL
|| !strcmp( filename
, "" ) )
705 // Get the codec ids selected
706 audio_codec_id
= fmt
->audio_codec
;
707 video_codec_id
= fmt
->video_codec
;
709 // Check for audio codec overides
710 if ( acodec
!= NULL
)
712 AVCodec
*p
= first_avcodec
;
715 if ( !strcmp( p
->name
, acodec
) && p
->type
== CODEC_TYPE_AUDIO
)
720 audio_codec_id
= p
->id
;
722 fprintf( stderr
, "consumer_avcodec: audio codec %s unrecognised - ignoring\n", acodec
);
725 // Check for video codec overides
726 if ( vcodec
!= NULL
)
728 AVCodec
*p
= first_avcodec
;
731 if ( !strcmp( p
->name
, vcodec
) && p
->type
== CODEC_TYPE_VIDEO
)
736 video_codec_id
= p
->id
;
738 fprintf( stderr
, "consumer_avcodec: video codec %s unrecognised - ignoring\n", vcodec
);
741 // Update the output context
747 tmp
= mlt_properties_get( properties
, "meta.attr.title.markup");
748 if (tmp
!= NULL
) snprintf( oc
->title
, sizeof(oc
->title
), "%s", tmp
);
750 tmp
= mlt_properties_get( properties
, "meta.attr.comment.markup");
751 if (tmp
!= NULL
) snprintf( oc
->comment
, sizeof(oc
->comment
), "%s", tmp
);
753 tmp
= mlt_properties_get( properties
, "meta.attr.author.markup");
754 if (tmp
!= NULL
) snprintf( oc
->author
, sizeof(oc
->author
), "%s", tmp
);
756 tmp
= mlt_properties_get( properties
, "meta.attr.copyright.markup");
757 if (tmp
!= NULL
) snprintf( oc
->copyright
, sizeof(oc
->copyright
), "%s", tmp
);
759 tmp
= mlt_properties_get( properties
, "meta.attr.album.markup");
760 if (tmp
!= NULL
) snprintf( oc
->album
, sizeof(oc
->album
), "%s", tmp
);
762 metavalue
= mlt_properties_get_int( properties
, "meta.attr.year.markup");
763 if (metavalue
!= 0) oc
->year
= metavalue
;
765 metavalue
= mlt_properties_get_int( properties
, "meta.attr.track.markup");
766 if (metavalue
!= 0) oc
->track
= metavalue
;
769 snprintf( oc
->filename
, sizeof(oc
->filename
), "%s", filename
);
771 // Add audio and video streams
772 if ( fmt
->video_codec
!= CODEC_ID_NONE
)
773 video_st
= add_video_stream( this, oc
, video_codec_id
);
774 if ( fmt
->audio_codec
!= CODEC_ID_NONE
)
775 audio_st
= add_audio_stream( this, oc
, audio_codec_id
);
777 // Set the parameters (even though we have none...)
778 if ( av_set_parameters(oc
, NULL
) >= 0 )
780 if ( video_st
&& !open_video( oc
, video_st
) )
783 audio_input_frame_size
= open_audio( oc
, audio_st
, audio_outbuf_size
);
785 // Open the output file, if needed
786 if ( !( fmt
->flags
& AVFMT_NOFILE
) )
788 if (url_fopen(&oc
->pb
, filename
, URL_WRONLY
) < 0)
790 fprintf(stderr
, "Could not open '%s'\n", filename
);
791 mlt_properties_set_int( properties
, "running", 0 );
795 // Write the stream header, if any
796 if ( mlt_properties_get_int( properties
, "running" ) )
797 av_write_header( oc
);
801 fprintf(stderr
, "Invalid output format parameters\n");
802 mlt_properties_set_int( properties
, "running", 0 );
807 output
= alloc_picture( video_st
->codec
->pix_fmt
, width
, height
);
809 // Last check - need at least one stream
810 if ( audio_st
== NULL
&& video_st
== NULL
)
811 mlt_properties_set_int( properties
, "running", 0 );
813 // Get the starting time (can ignore the times above)
814 gettimeofday( &ante
, NULL
);
816 // Loop while running
817 while( mlt_properties_get_int( properties
, "running" ) && !terminated
)
820 frame
= mlt_consumer_rt_frame( this );
822 // Check that we have a frame to work with
825 // Increment frames despatched
828 // Default audio args
829 frame_properties
= MLT_FRAME_PROPERTIES( frame
);
831 // Check for the terminated condition
832 terminated
= terminate_on_pause
&& mlt_properties_get_double( frame_properties
, "_speed" ) == 0.0;
834 // Get audio and append to the fifo
835 if ( !terminated
&& audio_st
)
837 samples
= mlt_sample_calculator( fps
, frequency
, count
++ );
838 mlt_frame_get_audio( frame
, &pcm
, &aud_fmt
, &frequency
, &channels
, &samples
);
840 // Create the fifo if we don't have one
843 fifo
= sample_fifo_init( frequency
, channels
);
844 mlt_properties_set_data( properties
, "sample_fifo", fifo
, 0, ( mlt_destructor
)sample_fifo_close
, NULL
);
847 if ( mlt_properties_get_double( frame_properties
, "_speed" ) != 1.0 )
848 memset( pcm
, 0, samples
* channels
* 2 );
850 // Append the samples
851 sample_fifo_append( fifo
, pcm
, samples
* channels
);
852 total_time
+= ( samples
* 1000000 ) / frequency
;
856 if ( !terminated
&& video_st
)
857 mlt_deque_push_back( queue
, frame
);
859 mlt_frame_close( frame
);
862 // While we have stuff to process, process...
866 audio_pts
= (double)audio_st
->pts
.val
* audio_st
->time_base
.num
/ audio_st
->time_base
.den
;
871 video_pts
= (double)video_st
->pts
.val
* video_st
->time_base
.num
/ video_st
->time_base
.den
;
875 // Write interleaved audio and video frames
876 if ( !video_st
|| ( video_st
&& audio_st
&& audio_pts
< video_pts
) )
878 if ( channels
* audio_input_frame_size
< sample_fifo_used( fifo
) )
882 av_init_packet( &pkt
);
886 sample_fifo_fetch( fifo
, buffer
, channels
* audio_input_frame_size
);
888 pkt
.size
= avcodec_encode_audio( c
, audio_outbuf
, audio_outbuf_size
, buffer
);
889 // Write the compressed frame in the media file
890 if ( c
->coded_frame
&& c
->coded_frame
->pts
!= AV_NOPTS_VALUE
)
891 pkt
.pts
= av_rescale_q( c
->coded_frame
->pts
, c
->time_base
, audio_st
->time_base
);
892 pkt
.flags
|= PKT_FLAG_KEY
;
893 pkt
.stream_index
= audio_st
->index
;
894 pkt
.data
= audio_outbuf
;
897 if ( av_interleaved_write_frame( oc
, &pkt
) != 0)
898 fprintf(stderr
, "Error while writing audio frame\n");
900 audio_pts
+= c
->frame_size
;
909 if ( mlt_deque_count( queue
) )
914 frame
= mlt_deque_pop_front( queue
);
915 frame_properties
= MLT_FRAME_PROPERTIES( frame
);
919 if ( mlt_properties_get_int( frame_properties
, "rendered" ) )
926 mlt_events_fire( properties
, "consumer-frame-show", frame
, NULL
);
928 mlt_frame_get_image( frame
, &image
, &img_fmt
, &img_width
, &img_height
, 0 );
932 // Convert the mlt frame to an AVPicture
933 for ( i
= 0; i
< height
; i
++ )
935 p
= input
->data
[ 0 ] + i
* input
->linesize
[ 0 ];
944 // Do the colour space conversion
946 struct SwsContext
*context
= sws_getContext( width
, height
, PIX_FMT_YUV422
,
947 width
, height
, video_st
->codec
->pix_fmt
, SWS_FAST_BILINEAR
, NULL
, NULL
, NULL
);
948 sws_scale( context
, input
->data
, input
->linesize
, 0, height
,
949 output
->data
, output
->linesize
);
950 sws_freeContext( context
);
952 img_convert( ( AVPicture
* )output
, video_st
->codec
->pix_fmt
, ( AVPicture
* )input
, PIX_FMT_YUV422
, width
, height
);
955 // Apply the alpha if applicable
956 if ( video_st
->codec
->pix_fmt
== PIX_FMT_RGBA32
)
958 uint8_t *alpha
= mlt_frame_get_alpha_mask( frame
);
961 for ( i
= 0; i
< height
; i
++ )
963 n
= ( width
+ 7 ) / 8;
964 p
= output
->data
[ 0 ] + i
* output
->linesize
[ 0 ];
972 case 0: do { *p
= *alpha
++; p
+= 4;
973 case 7: *p
= *alpha
++; p
+= 4;
974 case 6: *p
= *alpha
++; p
+= 4;
975 case 5: *p
= *alpha
++; p
+= 4;
976 case 4: *p
= *alpha
++; p
+= 4;
977 case 3: *p
= *alpha
++; p
+= 4;
978 case 2: *p
= *alpha
++; p
+= 4;
979 case 1: *p
= *alpha
++; p
+= 4;
987 if (oc
->oformat
->flags
& AVFMT_RAWPICTURE
)
989 // raw video case. The API will change slightly in the near future for that
991 av_init_packet(&pkt
);
993 pkt
.flags
|= PKT_FLAG_KEY
;
994 pkt
.stream_index
= video_st
->index
;
995 pkt
.data
= (uint8_t *)output
;
996 pkt
.size
= sizeof(AVPicture
);
998 ret
= av_write_frame(oc
, &pkt
);
999 video_pts
+= c
->frame_size
;
1004 output
->quality
= video_st
->quality
;
1007 out_size
= avcodec_encode_video(c
, video_outbuf
, video_outbuf_size
, output
);
1009 // If zero size, it means the image was buffered
1013 av_init_packet( &pkt
);
1015 if ( c
->coded_frame
&& c
->coded_frame
->pts
!= AV_NOPTS_VALUE
)
1016 pkt
.pts
= av_rescale_q( c
->coded_frame
->pts
, c
->time_base
, video_st
->time_base
);
1017 if( c
->coded_frame
&& c
->coded_frame
->key_frame
)
1018 pkt
.flags
|= PKT_FLAG_KEY
;
1019 pkt
.stream_index
= video_st
->index
;
1020 pkt
.data
= video_outbuf
;
1023 // write the compressed frame in the media file
1024 ret
= av_interleaved_write_frame(oc
, &pkt
);
1025 video_pts
+= c
->frame_size
;
1029 fprintf( stderr
, "Error with video encode\n" );
1033 mlt_frame_close( frame
);
1042 if ( real_time_output
&& frames
% 12 == 0 )
1044 long passed
= time_difference( &ante
);
1047 long pending
= ( ( ( long )sample_fifo_used( fifo
) * 1000 ) / frequency
) * 1000;
1050 if ( passed
< total_time
)
1052 long total
= ( total_time
- passed
);
1053 struct timespec t
= { total
/ 1000000, ( total
% 1000000 ) * 1000 };
1054 nanosleep( &t
, NULL
);
1061 close_video(oc
, video_st
);
1063 close_audio(oc
, audio_st
);
1065 // Write the trailer, if any
1066 av_write_trailer(oc
);
1069 for(i
= 0; i
< oc
->nb_streams
; i
++)
1070 av_freep(&oc
->streams
[i
]);
1072 // Close the output file
1073 if (!(fmt
->flags
& AVFMT_NOFILE
))
1074 url_fclose(&oc
->pb
);
1076 // Clean up input and output frames
1078 av_free( output
->data
[0] );
1080 av_free( input
->data
[0] );
1082 av_free( video_outbuf
);
1088 // Just in case we terminated on pause
1089 mlt_properties_set_int( properties
, "running", 0 );
1091 mlt_consumer_stopped( this );
1096 /** Close the consumer.
1099 static void consumer_close( mlt_consumer
this )
1101 // Stop the consumer
1102 mlt_consumer_stop( this );
1105 mlt_consumer_close( this );