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 );