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 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_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 // Terminate at end of the stream by default
74 mlt_properties_set_int( properties
, "terminate_on_pause", 1 );
76 // Set up start/stop/terminated callbacks
77 this->start
= consumer_start
;
78 this->stop
= consumer_stop
;
79 this->is_stopped
= consumer_is_stopped
;
83 // Clean up in case of init failure
92 /** Start the consumer.
95 static int consumer_start( mlt_consumer
this )
98 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
100 // Check that we're not already running
101 if ( !mlt_properties_get_int( properties
, "running" ) )
104 pthread_t
*thread
= calloc( 1, sizeof( pthread_t
) );
106 // Assign the thread to properties
107 mlt_properties_set_data( properties
, "thread", thread
, sizeof( pthread_t
), free
, NULL
);
109 // Set the running state
110 mlt_properties_set_int( properties
, "running", 1 );
113 pthread_create( thread
, NULL
, consumer_thread
, this );
118 /** Stop the consumer.
121 static int consumer_stop( mlt_consumer
this )
123 // Get the properties
124 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
126 // Check that we're running
127 if ( mlt_properties_get_int( properties
, "running" ) )
130 pthread_t
*thread
= mlt_properties_get_data( properties
, "thread", NULL
);
133 mlt_properties_set_int( properties
, "running", 0 );
135 // Wait for termination
136 pthread_join( *thread
, NULL
);
138 // Close the output file :-) - this is obtuse - doesn't matter if output file
139 // exists or not - the destructor will kick in if it does
140 mlt_properties_set_data( properties
, "output_file", NULL
, 0, NULL
, NULL
);
146 /** Determine if the consumer is stopped.
149 static int consumer_is_stopped( mlt_consumer
this )
151 // Get the properties
152 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
153 return !mlt_properties_get_int( properties
, "running" );
156 /** Get or create a new libdv encoder.
159 static dv_encoder_t
*libdv_get_encoder( mlt_consumer
this, mlt_frame frame
)
161 // Get the properties of the consumer
162 mlt_properties this_properties
= MLT_CONSUMER_PROPERTIES( this );
164 // Obtain the dv_encoder
165 dv_encoder_t
*encoder
= mlt_properties_get_data( this_properties
, "dv_encoder", NULL
);
167 // Construct one if we don't have one
168 if ( encoder
== NULL
)
170 // Get the fps of the consumer (for now - should be from frame)
171 double fps
= mlt_properties_get_double( this_properties
, "fps" );
173 // Create the encoder
174 encoder
= dv_encoder_new( 0, 0, 0 );
177 encoder
->isPAL
= fps
== 25;
179 encoder
->vlc_encode_passes
= 1;
180 encoder
->static_qno
= 0;
181 encoder
->force_dct
= DV_DCT_AUTO
;
183 // Store the encoder on the properties
184 mlt_properties_set_data( this_properties
, "dv_encoder", encoder
, 0, ( mlt_destructor
)dv_encoder_free
, NULL
);
187 // Return the encoder
192 /** The libdv encode video method.
195 static int consumer_encode_video( mlt_consumer
this, uint8_t *dv_frame
, mlt_frame frame
)
197 // Obtain the dv_encoder
198 dv_encoder_t
*encoder
= libdv_get_encoder( this, frame
);
200 // Get the properties of the consumer
201 mlt_properties this_properties
= MLT_CONSUMER_PROPERTIES( this );
203 // This will hold the size of the dv frame
206 // Is the image rendered
207 int rendered
= mlt_properties_get_int( MLT_FRAME_PROPERTIES( frame
), "rendered" );
209 // Get width and height
210 int width
= mlt_properties_get_int( this_properties
, "width" );
211 int height
= mlt_properties_get_int( this_properties
, "height" );
213 // If we get an encoder, then encode the image
214 if ( rendered
&& encoder
!= NULL
)
216 // Specify desired image properties
217 mlt_image_format fmt
= mlt_image_yuv422
;
218 uint8_t *image
= NULL
;
221 mlt_events_fire( this_properties
, "consumer-frame-show", frame
, 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
= mlt_properties_get_int( this_properties
, "frequency" );
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_int( this_properties
, "display_aspect_num" ) == 16;
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
++;
310 for ( j
= 0; j
< channels
; j
++ )
311 memset( audio_buffers
[ j
], 0, 2 * DV_AUDIO_MAX_SAMPLES
);
314 // Encode audio on frame
315 dv_encode_full_audio( encoder
, audio_buffers
, channels
, frequency
, dv_frame
);
317 // Specify meta data on the frame
318 dv_encode_metadata( dv_frame
, is_pal
, is_wide
, &start
, count
);
319 dv_encode_timecode( dv_frame
, is_pal
, count
);
322 mlt_properties_set_int( this_properties
, "count", ++ count
);
324 // Temporary - free audio buffers
325 for ( i
= 0 ; i
< 4; i
++ )
326 mlt_pool_release( audio_buffers
[ i
] );
330 /** The libdv output method.
333 static void consumer_output( mlt_consumer
this, uint8_t *dv_frame
, int size
, mlt_frame frame
)
335 // Get the properties
336 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
338 FILE *output
= stdout
;
339 char *target
= mlt_properties_get( properties
, "target" );
341 if ( target
!= NULL
)
343 output
= mlt_properties_get_data( properties
, "output_file", NULL
);
344 if ( output
== NULL
)
346 output
= fopen( target
, "w" );
347 if ( output
!= NULL
)
348 mlt_properties_set_data( properties
, "output_file", output
, 0, ( mlt_destructor
)fclose
, 0 );
352 if ( output
!= NULL
)
354 fwrite( dv_frame
, size
, 1, output
);
359 fprintf( stderr
, "Unable to open %s\n", target
);
363 /** The main thread - the argument is simply the consumer.
366 static void *consumer_thread( void *arg
)
368 // Map the argument to the object
369 mlt_consumer
this = arg
;
371 // Get the properties
372 mlt_properties properties
= MLT_CONSUMER_PROPERTIES( this );
374 // Get the terminate_on_pause property
375 int top
= mlt_properties_get_int( properties
, "terminate_on_pause" );
377 // Get the handling methods
378 int ( *video
)( mlt_consumer
, uint8_t *, mlt_frame
) = mlt_properties_get_data( properties
, "video", NULL
);
379 int ( *audio
)( mlt_consumer
, uint8_t *, mlt_frame
) = mlt_properties_get_data( properties
, "audio", NULL
);
380 int ( *output
)( mlt_consumer
, uint8_t *, int, mlt_frame
) = mlt_properties_get_data( properties
, "output", NULL
);
382 // Allocate a single PAL frame for encoding
383 uint8_t *dv_frame
= mlt_pool_alloc( FRAME_SIZE_625_50
);
386 mlt_frame frame
= NULL
;
389 // Loop while running
390 while( mlt_properties_get_int( properties
, "running" ) )
393 frame
= mlt_consumer_rt_frame( this );
395 // Check that we have a frame to work with
398 // Terminate on pause
399 if ( top
&& mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame
), "_speed" ) == 0 )
401 mlt_frame_close( frame
);
405 // Obtain the dv_encoder
406 if ( libdv_get_encoder( this, frame
) != NULL
)
409 size
= video( this, dv_frame
, frame
);
413 audio( this, dv_frame
, frame
);
416 output( this, dv_frame
, size
, frame
);
419 mlt_frame_close( frame
);
423 fprintf( stderr
, "Unable to obtain dv encoder.\n" );
429 mlt_pool_release( dv_frame
);
431 mlt_consumer_stopped( this );
436 /** Close the consumer.
439 static void consumer_close( mlt_consumer
this )
442 mlt_consumer_stop( this );
445 mlt_consumer_close( this );