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 );