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[mlt] / src / modules / dv / producer_libdv.c
1 /*
2  * producer_libdv.c -- simple libdv test case
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 "producer_libdv.h"
22 #include <framework/mlt_frame.h>
23 #include <framework/mlt_deque.h>
24 #include <framework/mlt_factory.h>
25 #include <pthread.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <stdio.h>
29 #include <libdv/dv.h>
30 #include <unistd.h>
31 #include <sys/types.h>
32 #include <sys/stat.h>
33 #include <fcntl.h>
34
35 /** To conserve resources, we maintain a stack of dv decoders.
36 */
37
38 static pthread_mutex_t decoder_lock = PTHREAD_MUTEX_INITIALIZER;
39 static mlt_properties dv_decoders = NULL;
40
41 dv_decoder_t *dv_decoder_alloc( )
42 {
43         // We'll return a dv_decoder
44         dv_decoder_t *this = NULL;
45
46         // Lock the mutex
47         pthread_mutex_lock( &decoder_lock );
48
49         // Create the properties if necessary
50         if ( dv_decoders == NULL )
51         {
52                 // Create the properties
53                 dv_decoders = mlt_properties_new( );
54
55                 // Create the stack
56                 mlt_properties_set_data( dv_decoders, "stack", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
57
58                 // Register the properties for clean up
59                 mlt_factory_register_for_clean_up( dv_decoders, ( mlt_destructor )mlt_properties_close );
60         }
61
62         // Now try to obtain a decoder
63         if ( dv_decoders != NULL )
64         {
65                 // Obtain the stack
66                 mlt_deque stack = mlt_properties_get_data( dv_decoders, "stack", NULL );
67
68                 // Pop the top of the stack
69                 this = mlt_deque_pop_back( stack );
70
71                 // Create a new decoder if none available
72                 if ( this == NULL )
73                 {
74                         // We'll need a unique property ID for this
75                         char label[ 256 ];
76
77                         // Configure the decoder
78                         this = dv_decoder_new( FALSE, FALSE, FALSE );
79                         this->quality = DV_QUALITY_COLOR | DV_QUALITY_AC_2;
80                         this->audio->arg_audio_emphasis = 2;
81                         dv_set_audio_correction( this, DV_AUDIO_CORRECT_AVERAGE );
82                         dv_set_error_log( this, NULL );
83
84                         // Register it with the properties to ensure clean up
85                         sprintf( label, "%p", this );
86                         mlt_properties_set_data( dv_decoders, label, this, 0, ( mlt_destructor )dv_decoder_free, NULL );
87                 }
88         }
89
90         // Unlock the mutex
91         pthread_mutex_unlock( &decoder_lock );
92
93         return this;
94 }
95
96 void dv_decoder_return( dv_decoder_t *this )
97 {
98         // Lock the mutex
99         pthread_mutex_lock( &decoder_lock );
100
101         // Now try to return the decoder
102         if ( dv_decoders != NULL )
103         {
104                 // Obtain the stack
105                 mlt_deque stack = mlt_properties_get_data( dv_decoders, "stack", NULL );
106
107                 // Push it back
108                 mlt_deque_push_back( stack, this );
109         }
110
111         // Unlock the mutex
112         pthread_mutex_unlock( &decoder_lock );
113 }
114
115
116 typedef struct producer_libdv_s *producer_libdv;
117
118 struct producer_libdv_s
119 {
120         struct mlt_producer_s parent;
121         int fd;
122         int is_pal;
123         uint64_t file_size;
124         int frame_size;
125         long frames_in_file;
126         mlt_producer alternative;
127 };
128
129 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
130 static void producer_close( mlt_producer parent );
131
132 static int producer_collect_info( producer_libdv this );
133
134 mlt_producer producer_libdv_init( char *filename )
135 {
136         producer_libdv this = calloc( sizeof( struct producer_libdv_s ), 1 );
137
138         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
139         {
140                 int destroy = 0;
141                 mlt_producer producer = &this->parent;
142                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
143
144                 // Set the resource property (required for all producers)
145                 mlt_properties_set( properties, "resource", filename );
146
147                 // Register transport implementation with the producer
148                 producer->close = ( mlt_destructor )producer_close;
149
150                 // Register our get_frame implementation with the producer
151                 producer->get_frame = producer_get_frame;
152
153                 // If we have mov or dv, then we'll use an alternative producer
154                 if ( strchr( filename, '.' ) != NULL && (
155                          strncasecmp( strrchr( filename, '.' ), ".avi", 4 ) == 0 ||
156                          strncasecmp( strrchr( filename, '.' ), ".mov", 4 ) == 0 ) )
157                 {
158                         // Load via an alternative mechanism
159                         this->alternative = mlt_factory_producer( "kino", filename );
160
161                         // If it's unavailable, then clean up
162                         if ( this->alternative == NULL )
163                                 destroy = 1;
164                         else
165                                 mlt_properties_pass( properties, MLT_PRODUCER_PROPERTIES( this->alternative ), "" );
166                         this->is_pal = mlt_properties_get_int( properties, "fps" ) == 25;
167                 }
168                 else
169                 {
170                         // Open the file if specified
171                         this->fd = open( filename, O_RDONLY );
172
173                         // Collect info
174                         if ( this->fd == -1 || !producer_collect_info( this ) )
175                                 destroy = 1;
176                 }
177
178                 // If we couldn't open the file, then destroy it now
179                 if ( destroy )
180                 {
181                         mlt_producer_close( producer );
182                         producer = NULL;
183                 }
184
185                 // Return the producer
186                 return producer;
187         }
188         free( this );
189         return NULL;
190 }
191
192 static int read_frame( int fd, uint8_t* frame_buf, int *isPAL )
193 {
194         int result = read( fd, frame_buf, FRAME_SIZE_525_60 ) == FRAME_SIZE_525_60;
195         if ( result )
196         {
197                 *isPAL = ( frame_buf[3] & 0x80 );
198
199                 if ( *isPAL )
200                 {
201                         int diff = FRAME_SIZE_625_50 - FRAME_SIZE_525_60;
202                         result = read( fd, frame_buf + FRAME_SIZE_525_60, diff ) == diff;
203                 }
204         }
205         
206         return result;
207 }
208
209 static int producer_collect_info( producer_libdv this )
210 {
211         int valid = 0;
212
213         uint8_t *dv_data = mlt_pool_alloc( FRAME_SIZE_625_50 );
214
215         if ( dv_data != NULL )
216         {
217                 // Read the first frame
218                 valid = read_frame( this->fd, dv_data, &this->is_pal );
219
220                 // If it looks like a valid frame, the get stats
221                 if ( valid )
222                 {
223                         // Get the properties
224                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
225
226                         // Get a dv_decoder
227                         dv_decoder_t *dv_decoder = dv_decoder_alloc( );
228
229                         // Determine the file size
230                         struct stat buf;
231                         fstat( this->fd, &buf );
232
233                         // Store the file size
234                         this->file_size = buf.st_size;
235
236                         // Determine the frame size
237                         this->frame_size = this->is_pal ? FRAME_SIZE_625_50 : FRAME_SIZE_525_60;
238
239                         // Determine the number of frames in the file
240                         this->frames_in_file = this->file_size / this->frame_size;
241
242                         // Calculate default in/out points
243                         double fps = this->is_pal ? 25 : 30000.0 / 1001.0;
244                         if ( mlt_properties_get_double( properties, "fps" ) == fps )
245                         {
246                                 if ( this->frames_in_file > 0 )
247                                 {
248                                         mlt_properties_set_position( properties, "length", this->frames_in_file );
249                                         mlt_properties_set_position( properties, "in", 0 );
250                                         mlt_properties_set_position( properties, "out", this->frames_in_file - 1 );
251                                 }
252                         }
253                         else
254                         {
255                                 valid = 0;
256                         }
257
258                         // Parse the header for meta info
259                         dv_parse_header( dv_decoder, dv_data );
260                         mlt_properties_set_double( properties, "aspect_ratio", 
261                                 dv_format_wide( dv_decoder ) ? ( this->is_pal ? 118.0/81.0 : 40.0/33.0 ) : ( this->is_pal ? 59.0/54.0 : 10.0/11.0 ) );
262
263                         // Return the decoder
264                         dv_decoder_return( dv_decoder );
265                 }
266
267                 mlt_pool_release( dv_data );
268         }
269
270         return valid;
271 }
272
273 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
274 {
275         int pitches[3] = { 0, 0, 0 };
276         uint8_t *pixels[3] = { NULL, NULL, NULL };
277         
278         // Get the frames properties
279         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
280
281         // Get a dv_decoder
282         dv_decoder_t *decoder = dv_decoder_alloc( );
283
284         // Get the dv data
285         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
286
287         // Get and set the quality request
288         char *quality = mlt_frame_pop_service( this );
289
290         if ( quality != NULL )
291         {
292                 if ( strncmp( quality, "fast", 4 ) == 0 )
293                         decoder->quality = ( DV_QUALITY_COLOR | DV_QUALITY_DC );
294                 else if ( strncmp( quality, "best", 4 ) == 0 )
295                         decoder->quality = ( DV_QUALITY_COLOR | DV_QUALITY_AC_2 );
296                 else
297                         decoder->quality = ( DV_QUALITY_COLOR | DV_QUALITY_AC_1 );
298         }
299
300         // Parse the header for meta info
301         dv_parse_header( decoder, dv_data );
302         
303         // Assign width and height from properties
304         *width = mlt_properties_get_int( properties, "width" );
305         *height = mlt_properties_get_int( properties, "height" );
306
307         // Extract an image of the format requested
308         if ( *format == mlt_image_yuv422 )
309         {
310                 // Allocate an image
311                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 2 );
312
313                 // Pass to properties for clean up
314                 mlt_properties_set_data( properties, "image", image, *width * ( *height + 1 ) * 2, ( mlt_destructor )mlt_pool_release, NULL );
315
316                 // Decode the image
317                 pitches[ 0 ] = *width * 2;
318                 pixels[ 0 ] = image;
319                 dv_decode_full_frame( decoder, dv_data, e_dv_color_yuv, pixels, pitches );
320
321                 // Assign result
322                 *buffer = image;
323         }
324         else if ( *format == mlt_image_rgb24 )
325         {
326                 // Allocate an image
327                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 3 );
328
329                 // Pass to properties for clean up
330                 mlt_properties_set_data( properties, "image", image, *width * ( *height + 1 ) * 3, ( mlt_destructor )mlt_pool_release, NULL );
331
332                 // Decode the frame
333                 pitches[ 0 ] = 720 * 3;
334                 pixels[ 0 ] = image;
335                 dv_decode_full_frame( decoder, dv_data, e_dv_color_rgb, pixels, pitches );
336
337                 // Assign result
338                 *buffer = image;
339         }
340
341         // Return the decoder
342         dv_decoder_return( decoder );
343
344         return 0;
345 }
346
347 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
348 {
349         int16_t *p;
350         int i, j;
351         int16_t *audio_channels[ 4 ];
352         
353         // Get the frames properties
354         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
355
356         // Get a dv_decoder
357         dv_decoder_t *decoder = dv_decoder_alloc( );
358
359         // Get the dv data
360         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
361
362         // Parse the header for meta info
363         dv_parse_header( decoder, dv_data );
364
365         // Check that we have audio
366         if ( decoder->audio->num_channels > 0 )
367         {
368                 // Obtain required values
369                 *frequency = decoder->audio->frequency;
370                 *samples = decoder->audio->samples_this_frame;
371                 *channels = decoder->audio->num_channels;
372
373                 // Create a temporary workspace
374                 for ( i = 0; i < 4; i++ )
375                         audio_channels[ i ] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ) );
376         
377                 // Create a workspace for the result
378                 *buffer = mlt_pool_alloc( *channels * DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ) );
379         
380                 // Pass the allocated audio buffer as a property
381                 mlt_properties_set_data( properties, "audio", *buffer, *channels * DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ), ( mlt_destructor )mlt_pool_release, NULL );
382         
383                 // Decode the audio
384                 dv_decode_full_audio( decoder, dv_data, audio_channels );
385                 
386                 // Interleave the audio
387                 p = *buffer;
388                 for ( i = 0; i < *samples; i++ )
389                         for ( j = 0; j < *channels; j++ )
390                                 *p++ = audio_channels[ j ][ i ];
391         
392                 // Free the temporary work space
393                 for ( i = 0; i < 4; i++ )
394                         mlt_pool_release( audio_channels[ i ] );
395         }
396         else
397         {
398                 // No audio available on the frame, so get test audio (silence)
399                 mlt_frame_get_audio( this, buffer, format, frequency, channels, samples );
400         }
401
402         // Return the decoder
403         dv_decoder_return( decoder );
404
405         return 0;
406 }
407
408 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
409 {
410         // Access the private data
411         producer_libdv this = producer->child;
412
413         // Will carry the frame data
414         uint8_t *data = NULL;
415
416         // Obtain the current frame number
417         uint64_t position = mlt_producer_frame( producer );
418         
419         if ( this->alternative == NULL )
420         {
421                 // Convert timecode to a file position (ensuring that we're on a frame boundary)
422                 uint64_t offset = position * this->frame_size;
423
424                 // Allocate space
425                 data = mlt_pool_alloc( FRAME_SIZE_625_50 );
426
427                 // Create an empty frame
428                 *frame = mlt_frame_init( );
429
430                 // Seek and fetch
431                 if ( this->fd != 0 && 
432                          lseek( this->fd, offset, SEEK_SET ) == offset &&
433                          read_frame( this->fd, data, &this->is_pal ) )
434                 {
435                         // Pass the dv data
436                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "dv_data", data, FRAME_SIZE_625_50, ( mlt_destructor )mlt_pool_release, NULL );
437                 }
438                 else
439                 {
440                         mlt_pool_release( data );
441                         data = NULL;
442                 }
443         }
444         else
445         {
446                 // Seek
447                 mlt_producer_seek( this->alternative, position );
448                 
449                 // Fetch
450                 mlt_service_get_frame( MLT_PRODUCER_SERVICE( this->alternative ), frame, 0 );
451
452                 // Verify
453                 if ( *frame != NULL )
454                         data = mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame ), "dv_data", NULL );
455         }
456
457         if ( data != NULL )
458         {
459                 // Get the frames properties
460                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
461         
462                 // Get a dv_decoder
463                 dv_decoder_t *dv_decoder = dv_decoder_alloc( );
464
465                 mlt_properties_set_int( properties, "test_image", 0 );
466                 mlt_properties_set_int( properties, "test_audio", 0 );
467
468                 // Update other info on the frame
469                 mlt_properties_set_int( properties, "width", 720 );
470                 mlt_properties_set_int( properties, "height", this->is_pal ? 576 : 480 );
471                 mlt_properties_set_int( properties, "top_field_first", !this->is_pal ? 0 : ( data[ 5 ] & 0x07 ) == 0 ? 0 : 1 );
472         
473                 // Parse the header for meta info
474                 dv_parse_header( dv_decoder, data );
475                 //mlt_properties_set_int( properties, "progressive", dv_is_progressive( dv_decoder ) );
476                 mlt_properties_set_double( properties, "aspect_ratio", 
477                                 dv_format_wide( dv_decoder ) ? ( this->is_pal ? 118.0/81.0 : 40.0/33.0 ) : ( this->is_pal ? 59.0/54.0 : 10.0/11.0 ) );
478         
479                 // Hmm - register audio callback
480                 mlt_frame_push_audio( *frame, producer_get_audio );
481         
482                 // Push the quality string
483                 mlt_frame_push_service( *frame, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "quality" ) );
484         
485                 // Push the get_image method on to the stack
486                 mlt_frame_push_get_image( *frame, producer_get_image );
487         
488                 // Return the decoder
489                 dv_decoder_return( dv_decoder );
490         }
491
492         // Update timecode on the frame we're creating
493         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
494
495         // Calculate the next timecode
496         mlt_producer_prepare_next( producer );
497
498         return 0;
499 }
500
501 static void producer_close( mlt_producer parent )
502 {
503         // Obtain this
504         producer_libdv this = parent->child;
505
506         // Close the file
507         if ( this->fd > 0 )
508                 close( this->fd );
509
510         if ( this->alternative )
511                 mlt_producer_close( this->alternative );
512
513         // Close the parent
514         parent->close = NULL;
515         mlt_producer_close( parent );
516
517         // Free the memory
518         free( this );
519 }