2 * producer_libdv.c -- simple libdv test case
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
21 #include <framework/mlt_producer.h>
22 #include <framework/mlt_frame.h>
23 #include <framework/mlt_deque.h>
24 #include <framework/mlt_factory.h>
31 #include <sys/types.h>
35 #define FRAME_SIZE_525_60 10 * 150 * 80
36 #define FRAME_SIZE_625_50 12 * 150 * 80
38 /** To conserve resources, we maintain a stack of dv decoders.
41 static pthread_mutex_t decoder_lock
= PTHREAD_MUTEX_INITIALIZER
;
42 static mlt_properties dv_decoders
= NULL
;
44 dv_decoder_t
*dv_decoder_alloc( )
46 // We'll return a dv_decoder
47 dv_decoder_t
*this = NULL
;
50 pthread_mutex_lock( &decoder_lock
);
52 // Create the properties if necessary
53 if ( dv_decoders
== NULL
)
55 // Create the properties
56 dv_decoders
= mlt_properties_new( );
59 mlt_properties_set_data( dv_decoders
, "stack", mlt_deque_init( ), 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
61 // Register the properties for clean up
62 mlt_factory_register_for_clean_up( dv_decoders
, ( mlt_destructor
)mlt_properties_close
);
65 // Now try to obtain a decoder
66 if ( dv_decoders
!= NULL
)
69 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
71 // Pop the top of the stack
72 this = mlt_deque_pop_back( stack
);
74 // Create a new decoder if none available
77 // We'll need a unique property ID for this
80 // Configure the decoder
81 this = dv_decoder_new( FALSE
, FALSE
, FALSE
);
82 this->quality
= DV_QUALITY_COLOR
| DV_QUALITY_AC_2
;
83 this->audio
->arg_audio_emphasis
= 2;
84 dv_set_audio_correction( this, DV_AUDIO_CORRECT_AVERAGE
);
85 dv_set_error_log( this, NULL
);
87 // Register it with the properties to ensure clean up
88 sprintf( label
, "%p", this );
89 mlt_properties_set_data( dv_decoders
, label
, this, 0, ( mlt_destructor
)dv_decoder_free
, NULL
);
94 pthread_mutex_unlock( &decoder_lock
);
99 void dv_decoder_return( dv_decoder_t
*this )
102 pthread_mutex_lock( &decoder_lock
);
104 // Now try to return the decoder
105 if ( dv_decoders
!= NULL
)
108 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
111 mlt_deque_push_back( stack
, this );
115 pthread_mutex_unlock( &decoder_lock
);
119 typedef struct producer_libdv_s
*producer_libdv
;
121 struct producer_libdv_s
123 struct mlt_producer_s parent
;
129 mlt_producer alternative
;
132 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
133 static void producer_close( mlt_producer parent
);
135 static int producer_collect_info( producer_libdv
this );
137 mlt_producer
producer_libdv_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *filename
)
139 producer_libdv
this = calloc( sizeof( struct producer_libdv_s
), 1 );
141 if ( filename
!= NULL
&& this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
144 mlt_producer producer
= &this->parent
;
145 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
147 // Set the resource property (required for all producers)
148 mlt_properties_set( properties
, "resource", filename
);
150 // Register transport implementation with the producer
151 producer
->close
= ( mlt_destructor
)producer_close
;
153 // Register our get_frame implementation with the producer
154 producer
->get_frame
= producer_get_frame
;
156 // If we have mov or dv, then we'll use an alternative producer
157 if ( strchr( filename
, '.' ) != NULL
&& (
158 strncasecmp( strrchr( filename
, '.' ), ".avi", 4 ) == 0 ||
159 strncasecmp( strrchr( filename
, '.' ), ".mov", 4 ) == 0 ) )
161 // Load via an alternative mechanism
162 mlt_profile profile
= mlt_service_profile( MLT_PRODUCER_SERVICE( producer
) );
163 this->alternative
= mlt_factory_producer( profile
, "kino", filename
);
165 // If it's unavailable, then clean up
166 if ( this->alternative
== NULL
)
169 mlt_properties_pass( properties
, MLT_PRODUCER_PROPERTIES( this->alternative
), "" );
170 this->is_pal
= ( ( int ) mlt_producer_get_fps( producer
) ) == 25;
174 // Open the file if specified
175 this->fd
= open( filename
, O_RDONLY
);
178 if ( this->fd
== -1 || !producer_collect_info( this ) )
182 // If we couldn't open the file, then destroy it now
185 mlt_producer_close( producer
);
189 // Return the producer
196 static int read_frame( int fd
, uint8_t* frame_buf
, int *isPAL
)
198 int result
= read( fd
, frame_buf
, FRAME_SIZE_525_60
) == FRAME_SIZE_525_60
;
201 *isPAL
= ( frame_buf
[3] & 0x80 );
205 int diff
= FRAME_SIZE_625_50
- FRAME_SIZE_525_60
;
206 result
= read( fd
, frame_buf
+ FRAME_SIZE_525_60
, diff
) == diff
;
213 static int producer_collect_info( producer_libdv
this )
217 uint8_t *dv_data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
219 if ( dv_data
!= NULL
)
221 // Read the first frame
222 valid
= read_frame( this->fd
, dv_data
, &this->is_pal
);
224 // If it looks like a valid frame, the get stats
227 // Get the properties
228 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
231 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
233 // Determine the file size
235 fstat( this->fd
, &buf
);
237 // Store the file size
238 this->file_size
= buf
.st_size
;
240 // Determine the frame size
241 this->frame_size
= this->is_pal ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
243 // Determine the number of frames in the file
244 this->frames_in_file
= this->file_size
/ this->frame_size
;
246 // Calculate default in/out points
247 double fps
= this->is_pal ?
25 : 30000.0 / 1001.0;
248 if ( mlt_producer_get_fps( &this->parent
) == fps
)
250 if ( this->frames_in_file
> 0 )
252 mlt_properties_set_position( properties
, "length", this->frames_in_file
);
253 mlt_properties_set_position( properties
, "in", 0 );
254 mlt_properties_set_position( properties
, "out", this->frames_in_file
- 1 );
262 // Parse the header for meta info
263 dv_parse_header( dv_decoder
, dv_data
);
264 mlt_properties_set_double( properties
, "aspect_ratio",
265 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 ) );
267 // Return the decoder
268 dv_decoder_return( dv_decoder
);
271 mlt_pool_release( dv_data
);
277 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
279 int pitches
[3] = { 0, 0, 0 };
280 uint8_t *pixels
[3] = { NULL
, NULL
, NULL
};
282 // Get the frames properties
283 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
286 dv_decoder_t
*decoder
= dv_decoder_alloc( );
289 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
291 // Get and set the quality request
292 char *quality
= mlt_frame_pop_service( this );
294 if ( quality
!= NULL
)
296 if ( strncmp( quality
, "fast", 4 ) == 0 )
297 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_DC
);
298 else if ( strncmp( quality
, "best", 4 ) == 0 )
299 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_2
);
301 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_1
);
304 // Parse the header for meta info
305 dv_parse_header( decoder
, dv_data
);
307 // Assign width and height according to the frame
309 *height
= dv_data
[ 3 ] & 0x80 ?
576 : 480;
311 // Extract an image of the format requested
312 if ( *format
== mlt_image_yuv422
|| *format
== mlt_image_yuv420p
)
315 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
317 // Pass to properties for clean up
318 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
321 pitches
[ 0 ] = *width
* 2;
323 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_yuv
, pixels
, pitches
);
327 *format
= mlt_image_yuv422
;
332 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 3 );
334 // Pass to properties for clean up
335 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 3, ( mlt_destructor
)mlt_pool_release
, NULL
);
338 pitches
[ 0 ] = 720 * 3;
340 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_rgb
, pixels
, pitches
);
344 *format
= mlt_image_rgb24
;
347 // Return the decoder
348 dv_decoder_return( decoder
);
353 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
357 int16_t *audio_channels
[ 4 ];
359 // Get the frames properties
360 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
363 dv_decoder_t
*decoder
= dv_decoder_alloc( );
366 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
368 // Parse the header for meta info
369 dv_parse_header( decoder
, dv_data
);
371 // Check that we have audio
372 if ( decoder
->audio
->num_channels
> 0 )
374 // Obtain required values
375 *frequency
= decoder
->audio
->frequency
;
376 *samples
= decoder
->audio
->samples_this_frame
;
377 *channels
= decoder
->audio
->num_channels
;
379 // Create a temporary workspace
380 for ( i
= 0; i
< 4; i
++ )
381 audio_channels
[ i
] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
383 // Create a workspace for the result
384 *buffer
= mlt_pool_alloc( *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
386 // Pass the allocated audio buffer as a property
387 mlt_properties_set_data( properties
, "audio", *buffer
, *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ), ( mlt_destructor
)mlt_pool_release
, NULL
);
390 dv_decode_full_audio( decoder
, dv_data
, audio_channels
);
392 // Interleave the audio
394 for ( i
= 0; i
< *samples
; i
++ )
395 for ( j
= 0; j
< *channels
; j
++ )
396 *p
++ = audio_channels
[ j
][ i
];
398 // Free the temporary work space
399 for ( i
= 0; i
< 4; i
++ )
400 mlt_pool_release( audio_channels
[ i
] );
404 // No audio available on the frame, so get test audio (silence)
405 mlt_frame_get_audio( this, buffer
, format
, frequency
, channels
, samples
);
408 // Return the decoder
409 dv_decoder_return( decoder
);
414 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
416 // Access the private data
417 producer_libdv
this = producer
->child
;
419 // Will carry the frame data
420 uint8_t *data
= NULL
;
422 // Obtain the current frame number
423 uint64_t position
= mlt_producer_frame( producer
);
425 if ( this->alternative
== NULL
)
427 // Convert timecode to a file position (ensuring that we're on a frame boundary)
428 uint64_t offset
= position
* this->frame_size
;
431 data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
433 // Create an empty frame
434 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
437 if ( this->fd
!= 0 &&
438 lseek( this->fd
, offset
, SEEK_SET
) == offset
&&
439 read_frame( this->fd
, data
, &this->is_pal
) )
442 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", data
, FRAME_SIZE_625_50
, ( mlt_destructor
)mlt_pool_release
, NULL
);
446 mlt_pool_release( data
);
453 mlt_producer_seek( this->alternative
, position
);
456 mlt_service_get_frame( MLT_PRODUCER_SERVICE( this->alternative
), frame
, 0 );
459 if ( *frame
!= NULL
)
460 data
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", NULL
);
465 // Get the frames properties
466 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
469 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
471 mlt_properties_set_int( properties
, "test_image", 0 );
472 mlt_properties_set_int( properties
, "test_audio", 0 );
474 // Update other info on the frame
475 mlt_properties_set_int( properties
, "width", 720 );
476 mlt_properties_set_int( properties
, "height", this->is_pal ?
576 : 480 );
477 mlt_properties_set_int( properties
, "top_field_first", !this->is_pal ?
0 : ( data
[ 5 ] & 0x07 ) == 0 ?
0 : 1 );
479 // Parse the header for meta info
480 dv_parse_header( dv_decoder
, data
);
481 //mlt_properties_set_int( properties, "progressive", dv_is_progressive( dv_decoder ) );
482 mlt_properties_set_double( properties
, "aspect_ratio",
483 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 ) );
486 mlt_properties_set_int( properties
, "frequency", dv_decoder
->audio
->frequency
);
487 mlt_properties_set_int( properties
, "channels", dv_decoder
->audio
->num_channels
);
489 // Hmm - register audio callback
490 mlt_frame_push_audio( *frame
, producer_get_audio
);
492 // Push the quality string
493 mlt_frame_push_service( *frame
, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "quality" ) );
495 // Push the get_image method on to the stack
496 mlt_frame_push_get_image( *frame
, producer_get_image
);
498 // Return the decoder
499 dv_decoder_return( dv_decoder
);
502 // Update timecode on the frame we're creating
503 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
505 // Calculate the next timecode
506 mlt_producer_prepare_next( producer
);
511 static void producer_close( mlt_producer parent
)
514 producer_libdv
this = parent
->child
;
520 if ( this->alternative
)
521 mlt_producer_close( this->alternative
);
524 parent
->close
= NULL
;
525 mlt_producer_close( parent
);