2 * consumer_libdv.c -- a DV encoder based on libdv
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software Foundation,
18 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 #include "consumer_libdv.h"
23 #include "producer_libdv.h"
26 #include <framework/mlt_frame.h>
28 // System header files
37 // Forward references.
38 static int consumer_start( mlt_consumer
this );
39 static int consumer_stop( mlt_consumer
this );
40 static int consumer_is_stopped( mlt_consumer
this );
41 static int consumer_encode_video( mlt_consumer
this, uint8_t *dv_frame
, mlt_frame frame
);
42 static void consumer_encode_audio( mlt_consumer
this, uint8_t *dv_frame
, mlt_frame frame
);
43 static void consumer_output( mlt_consumer
this, uint8_t *dv_frame
, int size
, mlt_frame frame
);
44 static void *consumer_thread( void *arg
);
45 static void consumer_close( mlt_consumer
this );
47 /** Initialise the dv consumer.
50 mlt_consumer
consumer_libdv_init( char *arg
)
52 // Allocate the consumer
53 mlt_consumer
this = calloc( 1, sizeof( struct mlt_consumer_s
) );
55 // If memory allocated and initialises without error
56 if ( this != NULL
&& mlt_consumer_init( this, NULL
) == 0 )
58 // Get properties from the consumer
59 mlt_properties properties
= mlt_consumer_properties( this );
61 // Assign close callback
62 this->close
= consumer_close
;
64 // Interpret the argument
66 mlt_properties_set( properties
, "target", arg
);
68 // Set the encode and output handling method
69 mlt_properties_set_data( properties
, "video", consumer_encode_video
, 0, NULL
, NULL
);
70 mlt_properties_set_data( properties
, "audio", consumer_encode_audio
, 0, NULL
, NULL
);
71 mlt_properties_set_data( properties
, "output", consumer_output
, 0, NULL
, NULL
);
73 // Set up start/stop/terminated callbacks
74 this->start
= consumer_start
;
75 this->stop
= consumer_stop
;
76 this->is_stopped
= consumer_is_stopped
;
80 // Clean up in case of init failure
89 /** Start the consumer.
92 static int consumer_start( mlt_consumer
this )
95 mlt_properties properties
= mlt_consumer_properties( this );
97 // Check that we're not already running
98 if ( !mlt_properties_get_int( properties
, "running" ) )
101 pthread_t
*thread
= calloc( 1, sizeof( pthread_t
) );
102 pthread_attr_t thread_attributes
;
104 // Assign the thread to properties
105 mlt_properties_set_data( properties
, "thread", thread
, sizeof( pthread_t
), free
, NULL
);
107 // Set the running state
108 mlt_properties_set_int( properties
, "running", 1 );
110 // Inherit the scheduling priority
111 pthread_attr_init( &thread_attributes
);
112 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
115 pthread_create( thread
, &thread_attributes
, consumer_thread
, this );
120 /** Stop the consumer.
123 static int consumer_stop( mlt_consumer
this )
125 // Get the properties
126 mlt_properties properties
= mlt_consumer_properties( this );
128 // Check that we're running
129 if ( mlt_properties_get_int( properties
, "running" ) )
132 pthread_t
*thread
= mlt_properties_get_data( properties
, "thread", NULL
);
135 mlt_properties_set_int( properties
, "running", 0 );
137 // Wait for termination
138 pthread_join( *thread
, NULL
);
140 // Close the output file :-) - this is obtuse - doesn't matter if output file
141 // exists or not - the destructor will kick in if it does
142 mlt_properties_set_data( properties
, "output_file", NULL
, 0, NULL
, NULL
);
148 /** Determine if the consumer is stopped.
151 static int consumer_is_stopped( mlt_consumer
this )
153 // Get the properties
154 mlt_properties properties
= mlt_consumer_properties( this );
155 return !mlt_properties_get_int( properties
, "running" );
158 /** Get or create a new libdv encoder.
161 static dv_encoder_t
*libdv_get_encoder( mlt_consumer
this, mlt_frame frame
)
163 // Get the properties of the consumer
164 mlt_properties this_properties
= mlt_consumer_properties( this );
166 // Obtain the dv_encoder
167 dv_encoder_t
*encoder
= mlt_properties_get_data( this_properties
, "dv_encoder", NULL
);
169 // Construct one if we don't have one
170 if ( encoder
== NULL
)
172 // Get the fps of the consumer (for now - should be from frame)
173 double fps
= mlt_properties_get_double( this_properties
, "fps" );
175 // Create the encoder
176 encoder
= dv_encoder_new( 0, 0, 0 );
179 encoder
->isPAL
= fps
== 25;
181 encoder
->vlc_encode_passes
= 1;
182 encoder
->static_qno
= 0;
183 encoder
->force_dct
= DV_DCT_AUTO
;
185 // Store the encoder on the properties
186 mlt_properties_set_data( this_properties
, "dv_encoder", encoder
, 0, ( mlt_destructor
)dv_encoder_free
, NULL
);
189 // Return the encoder
194 /** The libdv encode video method.
197 static int consumer_encode_video( mlt_consumer
this, uint8_t *dv_frame
, mlt_frame frame
)
199 // Obtain the dv_encoder
200 dv_encoder_t
*encoder
= libdv_get_encoder( this, frame
);
202 // Get the properties of the consumer
203 mlt_properties this_properties
= mlt_consumer_properties( this );
205 // This will hold the size of the dv frame
208 // Is the image rendered
209 int rendered
= mlt_properties_get_int( mlt_frame_properties( frame
), "rendered" );
211 // Get width and height
212 int width
= mlt_properties_get_int( this_properties
, "width" );
213 int height
= mlt_properties_get_int( this_properties
, "height" );
215 // If we get an encoder, then encode the image
216 if ( rendered
&& encoder
!= NULL
)
218 // Specify desired image properties
219 mlt_image_format fmt
= mlt_image_yuv422
;
220 uint8_t *image
= NULL
;
223 mlt_events_fire( this_properties
, "consumer-frame-show", frame
, NULL
);
224 mlt_frame_get_image( frame
, &image
, &fmt
, &width
, &height
, 0 );
226 // Check that we get what we expected
227 if ( fmt
!= mlt_image_yuv422
||
228 width
!= mlt_properties_get_int( this_properties
, "width" ) ||
229 height
!= mlt_properties_get_int( this_properties
, "height" ) ||
232 // We should try to recover here
233 fprintf( stderr
, "We have a problem houston...\n" );
237 // Calculate the size of the dv frame
238 size
= height
== 576 ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
245 dv_encode_full_frame( encoder
, &image
, e_dv_color_yuv
, dv_frame
);
248 else if ( encoder
!= NULL
)
250 // Calculate the size of the dv frame (duplicate of previous)
251 size
= height
== 576 ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
257 /** The libdv encode audio method.
260 static void consumer_encode_audio( mlt_consumer
this, uint8_t *dv_frame
, mlt_frame frame
)
262 // Get the properties of the consumer
263 mlt_properties this_properties
= mlt_consumer_properties( this );
265 // Get the properties of the frame
266 mlt_properties frame_properties
= mlt_frame_properties( frame
);
268 // Obtain the dv_encoder
269 dv_encoder_t
*encoder
= libdv_get_encoder( this, frame
);
271 // Only continue if we have an encoder
272 if ( encoder
!= NULL
)
274 // Get the frame count
275 int count
= mlt_properties_get_int( this_properties
, "count" );
277 // Default audio args
278 mlt_audio_format fmt
= mlt_audio_pcm
;
280 int frequency
= mlt_properties_get_int( this_properties
, "frequency" );
281 int samples
= mlt_sample_calculator( mlt_properties_get_double( this_properties
, "fps" ), frequency
, count
);
284 // Get the frame number
285 time_t start
= time( NULL
);
286 int height
= mlt_properties_get_int( this_properties
, "height" );
287 int is_pal
= height
== 576;
288 int is_wide
= mlt_properties_get_double( frame_properties
, "fps" ) == ( ( double ) 16.0 / 9.0 );
290 // Temporary - audio buffer allocation
291 int16_t *audio_buffers
[ 4 ];
294 for ( i
= 0 ; i
< 4; i
++ )
295 audio_buffers
[ i
] = mlt_pool_alloc( 2 * DV_AUDIO_MAX_SAMPLES
);
298 mlt_frame_get_audio( frame
, &pcm
, &fmt
, &frequency
, &channels
, &samples
);
300 // Inform the encoder of the number of audio samples
301 encoder
->samples_this_frame
= samples
;
303 // Fill the audio buffers correctly
304 if ( mlt_properties_get_double( frame_properties
, "_speed" ) == 1.0 )
306 for ( i
= 0; i
< samples
; i
++ )
307 for ( j
= 0; j
< channels
; j
++ )
308 audio_buffers
[ j
][ i
] = *pcm
++;
312 for ( j
= 0; j
< channels
; j
++ )
313 memset( audio_buffers
[ j
], 0, 2 * DV_AUDIO_MAX_SAMPLES
);
316 // Encode audio on frame
317 dv_encode_full_audio( encoder
, audio_buffers
, channels
, frequency
, dv_frame
);
319 // Specify meta data on the frame
320 dv_encode_metadata( dv_frame
, is_pal
, is_wide
, &start
, count
);
321 dv_encode_timecode( dv_frame
, is_pal
, count
);
324 mlt_properties_set_int( this_properties
, "count", ++ count
);
326 // Temporary - free audio buffers
327 for ( i
= 0 ; i
< 4; i
++ )
328 mlt_pool_release( audio_buffers
[ i
] );
332 /** The libdv output method.
335 static void consumer_output( mlt_consumer
this, uint8_t *dv_frame
, int size
, mlt_frame frame
)
337 // Get the properties
338 mlt_properties properties
= mlt_consumer_properties( this );
340 FILE *output
= stdout
;
341 char *target
= mlt_properties_get( properties
, "target" );
343 if ( target
!= NULL
)
345 output
= mlt_properties_get_data( properties
, "output_file", NULL
);
346 if ( output
== NULL
)
348 output
= fopen( target
, "w" );
349 if ( output
!= NULL
)
350 mlt_properties_set_data( properties
, "output_file", output
, 0, ( mlt_destructor
)fclose
, 0 );
354 if ( output
!= NULL
)
356 fwrite( dv_frame
, size
, 1, output
);
361 fprintf( stderr
, "Unable to open %s\n", target
);
365 /** The main thread - the argument is simply the consumer.
368 static void *consumer_thread( void *arg
)
370 // Map the argument to the object
371 mlt_consumer
this = arg
;
373 // Get the properties
374 mlt_properties properties
= mlt_consumer_properties( this );
376 // Get the terminate_on_pause property
377 int top
= mlt_properties_get_int( properties
, "terminate_on_pause" );
379 // Get the handling methods
380 int ( *video
)( mlt_consumer
, uint8_t *, mlt_frame
) = mlt_properties_get_data( properties
, "video", NULL
);
381 int ( *audio
)( mlt_consumer
, uint8_t *, mlt_frame
) = mlt_properties_get_data( properties
, "audio", NULL
);
382 int ( *output
)( mlt_consumer
, uint8_t *, int, mlt_frame
) = mlt_properties_get_data( properties
, "output", NULL
);
384 // Allocate a single PAL frame for encoding
385 uint8_t *dv_frame
= mlt_pool_alloc( FRAME_SIZE_625_50
);
388 mlt_frame frame
= NULL
;
391 // Loop while running
392 while( mlt_properties_get_int( properties
, "running" ) )
395 frame
= mlt_consumer_rt_frame( this );
397 // Check that we have a frame to work with
400 // Terminate on pause
401 if ( top
&& mlt_properties_get_double( mlt_frame_properties( frame
), "_speed" ) == 0 )
403 mlt_frame_close( frame
);
407 // Obtain the dv_encoder
408 if ( libdv_get_encoder( this, frame
) != NULL
)
411 size
= video( this, dv_frame
, frame
);
415 audio( this, dv_frame
, frame
);
418 output( this, dv_frame
, size
, frame
);
421 mlt_frame_close( frame
);
425 fprintf( stderr
, "Unable to obtain dv encoder.\n" );
431 mlt_pool_release( dv_frame
);
433 mlt_consumer_stopped( this );
438 /** Close the consumer.
441 static void consumer_close( mlt_consumer
this )
444 mlt_consumer_stop( this );
447 mlt_consumer_close( this );