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"
25 #include <framework/mlt_frame.h>
27 // System header files
36 // Forward references.
37 static int consumer_start( mlt_consumer this );
38 static int consumer_stop( mlt_consumer this );
39 static int consumer_is_stopped( mlt_consumer this );
40 static int consumer_encode_video( mlt_consumer this, uint8_t *dv_frame, mlt_frame frame );
41 static void consumer_encode_audio( mlt_consumer this, uint8_t *dv_frame, mlt_frame frame );
42 static void consumer_output( mlt_consumer this, uint8_t *dv_frame, int size, mlt_frame frame );
43 static void *consumer_thread( void *arg );
44 static void consumer_close( mlt_consumer this );
46 /** Initialise the dv consumer.
49 mlt_consumer consumer_libdv_init( char *arg )
51 // Allocate the consumer
52 mlt_consumer this = calloc( 1, sizeof( struct mlt_consumer_s ) );
54 // If memory allocated and initialises without error
55 if ( this != NULL && mlt_consumer_init( this, NULL ) == 0 )
57 // Get properties from the consumer
58 mlt_properties properties = mlt_consumer_properties( this );
60 // Assign close callback
61 this->close = consumer_close;
63 // Interpret the argument
65 mlt_properties_set( properties, "target", arg );
67 // Set the encode and output handling method
68 mlt_properties_set_data( properties, "video", consumer_encode_video, 0, NULL, NULL );
69 mlt_properties_set_data( properties, "audio", consumer_encode_audio, 0, NULL, NULL );
70 mlt_properties_set_data( properties, "output", consumer_output, 0, NULL, NULL );
72 // Set up start/stop/terminated callbacks
73 this->start = consumer_start;
74 this->stop = consumer_stop;
75 this->is_stopped = consumer_is_stopped;
79 // Clean up in case of init failure
88 /** Start the consumer.
91 static int consumer_start( mlt_consumer this )
94 mlt_properties properties = mlt_consumer_properties( this );
96 // Check that we're not already running
97 if ( !mlt_properties_get_int( properties, "running" ) )
100 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
101 pthread_attr_t thread_attributes;
103 // Assign the thread to properties
104 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
106 // Set the running state
107 mlt_properties_set_int( properties, "running", 1 );
109 // Inherit the scheduling priority
110 pthread_attr_init( &thread_attributes );
111 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
114 pthread_create( thread, &thread_attributes, consumer_thread, this );
119 /** Stop the consumer.
122 static int consumer_stop( mlt_consumer this )
124 // Get the properties
125 mlt_properties properties = mlt_consumer_properties( this );
127 // Check that we're running
128 if ( mlt_properties_get_int( properties, "running" ) )
131 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
134 mlt_properties_set_int( properties, "running", 0 );
136 // Wait for termination
137 pthread_join( *thread, NULL );
139 // Close the output file :-) - this is obtuse - doesn't matter if output file
140 // exists or not - the destructor will kick in if it does
141 mlt_properties_set_data( properties, "output_file", NULL, 0, NULL, NULL );
147 /** Determine if the consumer is stopped.
150 static int consumer_is_stopped( mlt_consumer this )
152 // Get the properties
153 mlt_properties properties = mlt_consumer_properties( this );
154 return !mlt_properties_get_int( properties, "running" );
157 /** Get or create a new libdv encoder.
160 static dv_encoder_t *libdv_get_encoder( mlt_consumer this, mlt_frame frame )
162 // Get the properties of the consumer
163 mlt_properties this_properties = mlt_consumer_properties( this );
165 // Obtain the dv_encoder
166 dv_encoder_t *encoder = mlt_properties_get_data( this_properties, "dv_encoder", NULL );
168 // Construct one if we don't have one
169 if ( encoder == NULL )
171 // Get the fps of the consumer (for now - should be from frame)
172 double fps = mlt_properties_get_double( this_properties, "fps" );
174 // Create the encoder
175 encoder = dv_encoder_new( 0, 0, 0 );
178 encoder->isPAL = fps == 25;
180 encoder->vlc_encode_passes = 1;
181 encoder->static_qno = 0;
182 encoder->force_dct = DV_DCT_AUTO;
184 // Store the encoder on the properties
185 mlt_properties_set_data( this_properties, "dv_encoder", encoder, 0, ( mlt_destructor )dv_encoder_free, NULL );
188 // Return the encoder
193 /** The libdv encode video method.
196 static int consumer_encode_video( mlt_consumer this, uint8_t *dv_frame, mlt_frame frame )
198 // Obtain the dv_encoder
199 dv_encoder_t *encoder = libdv_get_encoder( this, frame );
201 // Get the properties of the consumer
202 mlt_properties this_properties = mlt_consumer_properties( this );
204 // This will hold the size of the dv frame
207 // Is the image rendered
208 int rendered = mlt_properties_get_int( mlt_frame_properties( frame ), "rendered" );
210 // Get width and height
211 int width = mlt_properties_get_int( this_properties, "width" );
212 int height = mlt_properties_get_int( this_properties, "height" );
214 // If we get an encoder, then encode the image
215 if ( rendered && encoder != NULL )
217 // Specify desired image properties
218 mlt_image_format fmt = mlt_image_yuv422;
219 uint8_t *image = NULL;
222 mlt_frame_get_image( frame, &image, &fmt, &width, &height, 0 );
224 // Check that we get what we expected
225 if ( fmt != mlt_image_yuv422 ||
226 width != mlt_properties_get_int( this_properties, "width" ) ||
227 height != mlt_properties_get_int( this_properties, "height" ) ||
230 // We should try to recover here
231 fprintf( stderr, "We have a problem houston...\n" );
235 // Calculate the size of the dv frame
236 size = height == 576 ? frame_size_625_50 : frame_size_525_60;
243 dv_encode_full_frame( encoder, &image, e_dv_color_yuv, dv_frame );
246 else if ( encoder != NULL )
248 // Calculate the size of the dv frame (duplicate of previous)
249 size = height == 576 ? frame_size_625_50 : frame_size_525_60;
255 /** The libdv encode audio method.
258 static void consumer_encode_audio( mlt_consumer this, uint8_t *dv_frame, mlt_frame frame )
260 // Get the properties of the consumer
261 mlt_properties this_properties = mlt_consumer_properties( this );
263 // Get the properties of the frame
264 mlt_properties frame_properties = mlt_frame_properties( frame );
266 // Obtain the dv_encoder
267 dv_encoder_t *encoder = libdv_get_encoder( this, frame );
269 // Only continue if we have an encoder
270 if ( encoder != NULL )
272 // Get the frame count
273 int count = mlt_properties_get_int( this_properties, "count" );
275 // Default audio args
276 mlt_audio_format fmt = mlt_audio_pcm;
278 int frequency = 48000;
279 int samples = mlt_sample_calculator( mlt_properties_get_double( this_properties, "fps" ), frequency, count );
282 // Get the frame number
283 time_t start = time( NULL );
284 int height = mlt_properties_get_int( this_properties, "height" );
285 int is_pal = height == 576;
286 int is_wide = mlt_properties_get_double( frame_properties, "fps" ) == ( ( double ) 16.0 / 9.0 );
288 // Temporary - audio buffer allocation
289 int16_t *audio_buffers[ 4 ];
292 for ( i = 0 ; i < 4; i ++ )
293 audio_buffers[ i ] = mlt_pool_alloc( 2 * DV_AUDIO_MAX_SAMPLES );
296 mlt_frame_get_audio( frame, &pcm, &fmt, &frequency, &channels, &samples );
298 // Inform the encoder of the number of audio samples
299 encoder->samples_this_frame = samples;
301 // Fill the audio buffers correctly
302 if ( mlt_properties_get_double( frame_properties, "_speed" ) == 1.0 )
304 for ( i = 0; i < samples; i ++ )
305 for ( j = 0; j < channels; j++ )
306 audio_buffers[ j ][ i ] = *pcm ++;
309 // Encode audio on frame
310 dv_encode_full_audio( encoder, audio_buffers, channels, frequency, dv_frame );
312 // Specify meta data on the frame
313 dv_encode_metadata( dv_frame, is_pal, is_wide, &start, count );
314 dv_encode_timecode( dv_frame, is_pal, count );
317 mlt_properties_set_int( this_properties, "count", ++ count );
319 // Temporary - free audio buffers
320 for ( i = 0 ; i < 4; i ++ )
321 mlt_pool_release( audio_buffers[ i ] );
325 /** The libdv output method.
328 static void consumer_output( mlt_consumer this, uint8_t *dv_frame, int size, mlt_frame frame )
330 // Get the properties
331 mlt_properties properties = mlt_consumer_properties( this );
333 FILE *output = stdout;
334 char *target = mlt_properties_get( properties, "target" );
336 if ( target != NULL )
338 output = mlt_properties_get_data( properties, "output_file", NULL );
339 if ( output == NULL )
341 output = fopen( target, "w" );
342 if ( output != NULL )
343 mlt_properties_set_data( properties, "output_file", output, 0, ( mlt_destructor )fclose, 0 );
347 if ( output != NULL )
349 fwrite( dv_frame, size, 1, output );
354 fprintf( stderr, "Unable to open %s\n", target );
358 /** The main thread - the argument is simply the consumer.
361 static void *consumer_thread( void *arg )
363 // Map the argument to the object
364 mlt_consumer this = arg;
366 // Get the properties
367 mlt_properties properties = mlt_consumer_properties( this );
369 // Get the handling methods
370 int ( *video )( mlt_consumer, uint8_t *, mlt_frame ) = mlt_properties_get_data( properties, "video", NULL );
371 int ( *audio )( mlt_consumer, uint8_t *, mlt_frame ) = mlt_properties_get_data( properties, "audio", NULL );
372 int ( *output )( mlt_consumer, uint8_t *, int, mlt_frame ) = mlt_properties_get_data( properties, "output", NULL );
374 // Allocate a single PAL frame for encoding
375 uint8_t *dv_frame = mlt_pool_alloc( frame_size_625_50 );
378 mlt_frame frame = NULL;
381 // Loop while running
382 while( mlt_properties_get_int( properties, "running" ) )
385 frame = mlt_consumer_rt_frame( this );
387 // Check that we have a frame to work with
390 // Obtain the dv_encoder
391 if ( libdv_get_encoder( this, frame ) != NULL )
394 size = video( this, dv_frame, frame );
398 audio( this, dv_frame, frame );
401 output( this, dv_frame, size, frame );
404 mlt_frame_close( frame );
408 fprintf( stderr, "Unable to obtain dv encoder.\n" );
414 mlt_pool_release( dv_frame );
419 /** Close the consumer.
422 static void consumer_close( mlt_consumer this )
425 mlt_consumer_stop( this );
428 mlt_consumer_close( this );