Attempt at an aspect ratio clean up
[melted] / src / framework / mlt_tractor.c
1 /*
2 * mlt_tractor.c -- tractor service class
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Charles Yates <charles.yates@pandora.be>
5 *
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.
10 *
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.
15 *
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.
19 */
20
21 #include "config.h"
22
23 #include "mlt_tractor.h"
24 #include "mlt_frame.h"
25 #include "mlt_multitrack.h"
26 #include "mlt_field.h"
27
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31
32 /** Private structure.
33 */
34
35 struct mlt_tractor_s
36 {
37 struct mlt_producer_s parent;
38 mlt_service producer;
39 };
40
41 /** Forward references to static methods.
42 */
43
44 static int producer_get_frame( mlt_producer this, mlt_frame_ptr frame, int track );
45 static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this );
46
47 /** Constructor for the tractor.
48 */
49
50 mlt_tractor mlt_tractor_init( )
51 {
52 mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
53 if ( this != NULL )
54 {
55 mlt_producer producer = &this->parent;
56 if ( mlt_producer_init( producer, this ) == 0 )
57 {
58 mlt_properties_set( mlt_producer_properties( producer ), "resource", "<tractor>" );
59 mlt_properties_set( mlt_producer_properties( producer ), "mlt_type", "mlt_producer" );
60 mlt_properties_set( mlt_producer_properties( producer ), "mlt_service", "tractor" );
61
62 producer->get_frame = producer_get_frame;
63 producer->close = ( mlt_destructor )mlt_tractor_close;
64 producer->close_object = this;
65 }
66 else
67 {
68 free( this );
69 this = NULL;
70 }
71 }
72 return this;
73 }
74
75 mlt_tractor mlt_tractor_new( )
76 {
77 mlt_tractor this = calloc( sizeof( struct mlt_tractor_s ), 1 );
78 if ( this != NULL )
79 {
80 mlt_producer producer = &this->parent;
81 if ( mlt_producer_init( producer, this ) == 0 )
82 {
83 mlt_multitrack multitrack = mlt_multitrack_init( );
84 mlt_field field = mlt_field_new( multitrack, this );
85 mlt_properties props = mlt_producer_properties( producer );
86
87 mlt_properties_set( props, "resource", "<tractor>" );
88 mlt_properties_set( props, "mlt_type", "mlt_producer" );
89 mlt_properties_set( props, "mlt_service", "tractor" );
90 mlt_properties_set_position( props, "in", 0 );
91 mlt_properties_set_position( props, "out", 0 );
92 mlt_properties_set_position( props, "length", 0 );
93 mlt_properties_set_data( props, "multitrack", multitrack, 0, ( mlt_destructor )mlt_multitrack_close, NULL );
94 mlt_properties_set_data( props, "field", field, 0, ( mlt_destructor )mlt_field_close, NULL );
95
96 mlt_events_listen( mlt_multitrack_properties( multitrack ), this, "producer-changed", ( mlt_listener )mlt_tractor_listener );
97
98 producer->get_frame = producer_get_frame;
99 producer->close = ( mlt_destructor )mlt_tractor_close;
100 producer->close_object = this;
101 }
102 else
103 {
104 free( this );
105 this = NULL;
106 }
107 }
108 return this;
109 }
110
111 /** Get the service object associated to the tractor.
112 */
113
114 mlt_service mlt_tractor_service( mlt_tractor this )
115 {
116 return mlt_producer_service( &this->parent );
117 }
118
119 /** Get the producer object associated to the tractor.
120 */
121
122 mlt_producer mlt_tractor_producer( mlt_tractor this )
123 {
124 return this != NULL ? &this->parent : NULL;
125 }
126
127 /** Get the properties object associated to the tractor.
128 */
129
130 mlt_properties mlt_tractor_properties( mlt_tractor this )
131 {
132 return mlt_producer_properties( &this->parent );
133 }
134
135 /** Get the field this tractor is harvesting.
136 */
137
138 mlt_field mlt_tractor_field( mlt_tractor this )
139 {
140 return mlt_properties_get_data( mlt_tractor_properties( this ), "field", NULL );
141 }
142
143 /** Get the multitrack this tractor is pulling.
144 */
145
146 mlt_multitrack mlt_tractor_multitrack( mlt_tractor this )
147 {
148 return mlt_properties_get_data( mlt_tractor_properties( this ), "multitrack", NULL );
149 }
150
151 /** Ensure the tractors in/out points match the multitrack.
152 */
153
154 void mlt_tractor_refresh( mlt_tractor this )
155 {
156 mlt_multitrack multitrack = mlt_tractor_multitrack( this );
157 mlt_properties properties = mlt_multitrack_properties( multitrack );
158 mlt_properties self = mlt_tractor_properties( this );
159 mlt_events_block( properties, self );
160 mlt_events_block( self, self );
161 mlt_multitrack_refresh( multitrack );
162 mlt_properties_set_position( self, "in", 0 );
163 mlt_properties_set_position( self, "out", mlt_properties_get_position( properties, "out" ) );
164 mlt_events_unblock( self, self );
165 mlt_events_unblock( properties, self );
166 mlt_properties_set_position( self, "length", mlt_properties_get_position( properties, "length" ) );
167 }
168
169 static void mlt_tractor_listener( mlt_multitrack tracks, mlt_tractor this )
170 {
171 mlt_tractor_refresh( this );
172 }
173
174 /** Connect the tractor.
175 */
176
177 int mlt_tractor_connect( mlt_tractor this, mlt_service producer )
178 {
179 int ret = mlt_service_connect_producer( mlt_tractor_service( this ), producer, 0 );
180
181 // This is the producer we're going to connect to
182 if ( ret == 0 )
183 this->producer = producer;
184
185 return ret;
186 }
187
188 /** Set the producer for a specific track.
189 */
190
191 int mlt_tractor_set_track( mlt_tractor this, mlt_producer producer, int index )
192 {
193 return mlt_multitrack_connect( mlt_tractor_multitrack( this ), producer, index );
194 }
195
196 /** Get the producer for a specific track.
197 */
198
199 mlt_producer mlt_tractor_get_track( mlt_tractor this, int index )
200 {
201 return mlt_multitrack_track( mlt_tractor_multitrack( this ), index );
202 }
203
204 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
205 {
206 uint8_t *data = NULL;
207 mlt_properties properties = mlt_frame_properties( this );
208 mlt_frame frame = mlt_frame_pop_service( this );
209 mlt_properties frame_properties = mlt_frame_properties( frame );
210 mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( properties, "width" ) );
211 mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( properties, "height" ) );
212 mlt_properties_set( frame_properties, "rescale.interp", mlt_properties_get( properties, "rescale.interp" ) );
213 if ( mlt_properties_get( properties, "distort" ) )
214 mlt_properties_set( frame_properties, "distort", mlt_properties_get( properties, "distort" ) );
215 mlt_properties_set_double( frame_properties, "consumer_aspect_ratio", mlt_properties_get_double( properties, "consumer_aspect_ratio" ) );
216 mlt_properties_set_int( frame_properties, "consumer_deinterlace", mlt_properties_get_double( properties, "consumer_deinterlace" ) );
217 mlt_properties_set_int( frame_properties, "normalised_width", mlt_properties_get_double( properties, "normalised_width" ) );
218 mlt_properties_set_int( frame_properties, "normalised_height", mlt_properties_get_double( properties, "normalised_height" ) );
219 mlt_frame_get_image( frame, buffer, format, width, height, writable );
220 mlt_properties_set_data( properties, "image", *buffer, *width * *height * 2, NULL, NULL );
221 mlt_properties_set_int( properties, "width", *width );
222 mlt_properties_set_int( properties, "height", *height );
223 mlt_properties_set_double( properties, "aspect_ratio", mlt_frame_get_aspect_ratio( frame ) );
224 mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( frame_properties, "progressive" ) );
225 if ( mlt_properties_get( frame_properties, "distort" ) )
226 mlt_properties_set( properties, "distort", mlt_properties_get( frame_properties, "distort" ) );
227 data = mlt_frame_get_alpha_mask( frame );
228 mlt_properties_set_data( properties, "alpha", data, 0, NULL, NULL );
229 return 0;
230 }
231
232 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
233 {
234 mlt_properties properties = mlt_frame_properties( this );
235 mlt_frame frame = mlt_frame_pop_audio( this );
236 mlt_frame_get_audio( frame, buffer, format, frequency, channels, samples );
237 mlt_properties_set_data( properties, "audio", *buffer, 0, NULL, NULL );
238 mlt_properties_set_int( properties, "frequency", *frequency );
239 mlt_properties_set_int( properties, "channels", *channels );
240 return 0;
241 }
242
243 /** Get the next frame.
244 */
245
246 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int track )
247 {
248 mlt_tractor this = parent->child;
249
250 // We only respond to the first track requests
251 if ( track == 0 && this->producer != NULL )
252 {
253 int i = 0;
254 int done = 0;
255 mlt_frame temp = NULL;
256 int count = 0;
257
258 // Get the properties of the parent producer
259 mlt_properties properties = mlt_producer_properties( parent );
260
261 // Try to obtain the multitrack associated to the tractor
262 mlt_multitrack multitrack = mlt_properties_get_data( properties, "multitrack", NULL );
263
264 // Or a specific producer
265 mlt_producer producer = mlt_properties_get_data( properties, "producer", NULL );
266
267 // If we don't have one, we're in trouble...
268 if ( multitrack != NULL )
269 {
270 // Used to garbage collect all frames
271 char label[ 30 ];
272
273 // Get the id of the tractor
274 char *id = mlt_properties_get( properties, "_unique_id" );
275
276 // Will be used to store the frame properties object
277 mlt_properties frame_properties = NULL;
278
279 // We'll store audio and video frames to use here
280 mlt_frame audio = NULL;
281 mlt_frame video = NULL;
282
283 // Determine which data_queue to pass on...
284 void *data_queue = NULL;
285
286 // Temporary properties
287 mlt_properties temp_properties = NULL;
288
289 // Get the multitrack's producer
290 mlt_producer target = mlt_multitrack_producer( multitrack );
291 mlt_producer_seek( target, mlt_producer_frame( parent ) );
292 mlt_producer_set_speed( target, mlt_producer_get_speed( parent ) );
293
294 // We will create one frame and attach everything to it
295 *frame = mlt_frame_init( );
296
297 // Get the properties of the frame
298 frame_properties = mlt_frame_properties( *frame );
299
300 // Loop through each of the tracks we're harvesting
301 for ( i = 0; !done; i ++ )
302 {
303 // Get a frame from the producer
304 mlt_service_get_frame( this->producer, &temp, i );
305
306 // Get the temporary properties
307 temp_properties = mlt_frame_properties( temp );
308
309 // Check for last track
310 done = mlt_properties_get_int( temp_properties, "last_track" );
311
312 // We store all frames with a destructor on the output frame
313 sprintf( label, "_%s_%d", id, count ++ );
314 mlt_properties_set_data( frame_properties, label, temp, 0, ( mlt_destructor )mlt_frame_close, NULL );
315
316 // We want the last data_queue
317 if ( !done && mlt_properties_get_data( temp_properties, "data_queue", NULL ) != NULL )
318 data_queue = mlt_properties_get_data( mlt_frame_properties( temp ), "data_queue", NULL );
319
320 // Pick up first video and audio frames
321 if ( !done && !mlt_frame_is_test_audio( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 2 ) )
322 audio = temp;
323 if ( !done && !mlt_frame_is_test_card( temp ) && !( mlt_properties_get_int( temp_properties, "hide" ) & 1 ) )
324 video = temp;
325 }
326
327 // Now stack callbacks
328 if ( audio != NULL )
329 {
330 mlt_frame_push_audio( *frame, audio );
331 ( *frame )->get_audio = producer_get_audio;
332 }
333
334 if ( video != NULL )
335 {
336 mlt_properties video_properties = mlt_frame_properties( video );
337 mlt_frame_push_service( *frame, video );
338 mlt_frame_push_service( *frame, producer_get_image );
339 mlt_properties_set_data( frame_properties, "data_queue", data_queue, 0, NULL, NULL );
340 mlt_properties_set_int( frame_properties, "width", mlt_properties_get_int( video_properties, "width" ) );
341 mlt_properties_set_int( frame_properties, "height", mlt_properties_get_int( video_properties, "height" ) );
342 mlt_properties_set_int( frame_properties, "real_width", mlt_properties_get_int( video_properties, "real_width" ) );
343 mlt_properties_set_int( frame_properties, "real_height", mlt_properties_get_int( video_properties, "real_height" ) );
344 mlt_properties_set_int( frame_properties, "progressive", mlt_properties_get_int( video_properties, "progressive" ) );
345 mlt_properties_set_double( frame_properties, "aspect_ratio", mlt_properties_get_double( video_properties, "aspect_ratio" ) );
346 }
347
348 mlt_frame_set_position( *frame, mlt_producer_frame( parent ) );
349 mlt_properties_set_int( mlt_frame_properties( *frame ), "test_audio", audio == NULL );
350 mlt_properties_set_int( mlt_frame_properties( *frame ), "test_image", video == NULL );
351 }
352 else if ( producer != NULL )
353 {
354 mlt_producer_seek( producer, mlt_producer_frame( parent ) );
355 mlt_producer_set_speed( producer, mlt_producer_get_speed( parent ) );
356 mlt_service_get_frame( this->producer, frame, track );
357 }
358 else
359 {
360 fprintf( stderr, "tractor without a multitrack!!\n" );
361 mlt_service_get_frame( this->producer, frame, track );
362 }
363
364 // Prepare the next frame
365 mlt_producer_prepare_next( parent );
366
367 // Indicate our found status
368 return 0;
369 }
370 else
371 {
372 // Generate a test card
373 *frame = mlt_frame_init( );
374 return 0;
375 }
376 }
377
378 /** Close the tractor.
379 */
380
381 void mlt_tractor_close( mlt_tractor this )
382 {
383 if ( this != NULL && mlt_properties_dec_ref( mlt_tractor_properties( this ) ) <= 0 )
384 {
385 this->parent.close = NULL;
386 mlt_producer_close( &this->parent );
387 free( this );
388 }
389 }
390