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>
25 #include <framework/mlt_profile.h>
33 #include <sys/types.h>
37 #define FRAME_SIZE_525_60 10 * 150 * 80
38 #define FRAME_SIZE_625_50 12 * 150 * 80
40 /** To conserve resources, we maintain a stack of dv decoders.
43 static pthread_mutex_t decoder_lock
= PTHREAD_MUTEX_INITIALIZER
;
44 static mlt_properties dv_decoders
= NULL
;
46 dv_decoder_t
*dv_decoder_alloc( )
48 // We'll return a dv_decoder
49 dv_decoder_t
*this = NULL
;
52 pthread_mutex_lock( &decoder_lock
);
54 // Create the properties if necessary
55 if ( dv_decoders
== NULL
)
57 // Create the properties
58 dv_decoders
= mlt_properties_new( );
61 mlt_properties_set_data( dv_decoders
, "stack", mlt_deque_init( ), 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
63 // Register the properties for clean up
64 mlt_factory_register_for_clean_up( dv_decoders
, ( mlt_destructor
)mlt_properties_close
);
67 // Now try to obtain a decoder
68 if ( dv_decoders
!= NULL
)
71 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
73 // Pop the top of the stack
74 this = mlt_deque_pop_back( stack
);
76 // Create a new decoder if none available
79 // We'll need a unique property ID for this
82 // Configure the decoder
83 this = dv_decoder_new( FALSE
, FALSE
, FALSE
);
84 this->quality
= DV_QUALITY_COLOR
| DV_QUALITY_AC_2
;
85 this->audio
->arg_audio_emphasis
= 2;
86 dv_set_audio_correction( this, DV_AUDIO_CORRECT_AVERAGE
);
87 dv_set_error_log( this, NULL
);
89 // Register it with the properties to ensure clean up
90 sprintf( label
, "%p", this );
91 mlt_properties_set_data( dv_decoders
, label
, this, 0, ( mlt_destructor
)dv_decoder_free
, NULL
);
96 pthread_mutex_unlock( &decoder_lock
);
101 void dv_decoder_return( dv_decoder_t
*this )
104 pthread_mutex_lock( &decoder_lock
);
106 // Now try to return the decoder
107 if ( dv_decoders
!= NULL
)
110 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
113 mlt_deque_push_back( stack
, this );
117 pthread_mutex_unlock( &decoder_lock
);
121 typedef struct producer_libdv_s
*producer_libdv
;
123 struct producer_libdv_s
125 struct mlt_producer_s parent
;
131 mlt_producer alternative
;
134 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
135 static void producer_close( mlt_producer parent
);
137 static int producer_collect_info( producer_libdv
this, mlt_profile profile
);
139 mlt_producer
producer_libdv_init( mlt_profile profile
, mlt_service_type type
, const char *id
, char *filename
)
141 producer_libdv
this = calloc( sizeof( struct producer_libdv_s
), 1 );
143 if ( filename
!= NULL
&& this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
146 mlt_producer producer
= &this->parent
;
147 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
149 // Set the resource property (required for all producers)
150 mlt_properties_set( properties
, "resource", filename
);
152 // Register transport implementation with the producer
153 producer
->close
= ( mlt_destructor
)producer_close
;
155 // Register our get_frame implementation with the producer
156 producer
->get_frame
= producer_get_frame
;
158 // If we have mov or dv, then we'll use an alternative producer
159 if ( strchr( filename
, '.' ) != NULL
&& (
160 strncasecmp( strrchr( filename
, '.' ), ".avi", 4 ) == 0 ||
161 strncasecmp( strrchr( filename
, '.' ), ".mov", 4 ) == 0 ) )
163 // Load via an alternative mechanism
164 mlt_profile profile
= mlt_service_profile( MLT_PRODUCER_SERVICE( producer
) );
165 this->alternative
= mlt_factory_producer( profile
, "kino", filename
);
167 // If it's unavailable, then clean up
168 if ( this->alternative
== NULL
)
171 mlt_properties_pass( properties
, MLT_PRODUCER_PROPERTIES( this->alternative
), "" );
172 this->is_pal
= ( ( int ) mlt_producer_get_fps( producer
) ) == 25;
176 // Open the file if specified
177 this->fd
= open( filename
, O_RDONLY
);
180 if ( this->fd
== -1 || !producer_collect_info( this, profile
) )
184 // If we couldn't open the file, then destroy it now
187 mlt_producer_close( producer
);
191 // Return the producer
198 static int read_frame( int fd
, uint8_t* frame_buf
, int *isPAL
)
200 int result
= read( fd
, frame_buf
, FRAME_SIZE_525_60
) == FRAME_SIZE_525_60
;
203 *isPAL
= ( frame_buf
[3] & 0x80 );
206 int diff
= FRAME_SIZE_625_50
- FRAME_SIZE_525_60
;
207 result
= read( fd
, frame_buf
+ FRAME_SIZE_525_60
, diff
) == diff
;
214 static int producer_collect_info( producer_libdv
this, mlt_profile profile
)
218 uint8_t *dv_data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
220 if ( dv_data
!= NULL
)
222 // Read the first frame
223 valid
= read_frame( this->fd
, dv_data
, &this->is_pal
);
225 // If it looks like a valid frame, the get stats
228 // Get the properties
229 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
232 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
234 // Determine the file size
236 fstat( this->fd
, &buf
);
238 // Store the file size
239 this->file_size
= buf
.st_size
;
241 // Determine the frame size
242 this->frame_size
= this->is_pal ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
244 // Determine the number of frames in the file
245 this->frames_in_file
= this->file_size
/ this->frame_size
;
247 // Calculate default in/out points
248 int fps
= 1000 * ( this->is_pal ?
25 : ( 30000.0 / 1001.0 ) );
249 if ( ( int )( mlt_profile_fps( profile
) * 1000 ) == fps
)
251 if ( this->frames_in_file
> 0 )
253 mlt_properties_set_position( properties
, "length", this->frames_in_file
);
254 mlt_properties_set_position( properties
, "in", 0 );
255 mlt_properties_set_position( properties
, "out", this->frames_in_file
- 1 );
263 // Parse the header for meta info
264 dv_parse_header( dv_decoder
, dv_data
);
265 mlt_properties_set_double( properties
, "aspect_ratio",
266 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 mlt_properties_set_double( properties
, "source_fps", this->is_pal ?
25 : ( 30000.0 / 1001.0 ) );
268 mlt_properties_set_int( properties
, "meta.media.nb_streams", 2 );
269 mlt_properties_set_int( properties
, "video_index", 0 );
270 mlt_properties_set( properties
, "meta.media.0.stream.type", "video" );
271 mlt_properties_set( properties
, "meta.media.0.codec.name", "dvvideo" );
272 mlt_properties_set( properties
, "meta.media.0.codec.long_name", "DV (Digital Video)" );
273 mlt_properties_set_int( properties
, "audio_index", 1 );
274 mlt_properties_set( properties
, "meta.media.1.stream.type", "audio" );
275 mlt_properties_set( properties
, "meta.media.1.codec.name", "pcm_s16le" );
276 mlt_properties_set( properties
, "meta.media.1.codec.long_name", "signed 16-bit little-endian PCM" );
278 // Return the decoder
279 dv_decoder_return( dv_decoder
);
282 mlt_pool_release( dv_data
);
288 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
290 int pitches
[3] = { 0, 0, 0 };
291 uint8_t *pixels
[3] = { NULL
, NULL
, NULL
};
293 // Get the frames properties
294 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
297 dv_decoder_t
*decoder
= dv_decoder_alloc( );
300 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
302 // Get and set the quality request
303 char *quality
= mlt_frame_pop_service( this );
305 if ( quality
!= NULL
)
307 if ( strncmp( quality
, "fast", 4 ) == 0 )
308 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_DC
);
309 else if ( strncmp( quality
, "best", 4 ) == 0 )
310 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_2
);
312 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_1
);
315 // Parse the header for meta info
316 dv_parse_header( decoder
, dv_data
);
318 // Assign width and height according to the frame
320 *height
= dv_data
[ 3 ] & 0x80 ?
576 : 480;
322 // Extract an image of the format requested
323 if ( *format
== mlt_image_yuv422
|| *format
== mlt_image_yuv420p
)
326 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
328 // Pass to properties for clean up
329 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
332 pitches
[ 0 ] = *width
* 2;
334 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_yuv
, pixels
, pitches
);
338 *format
= mlt_image_yuv422
;
343 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 3 );
345 // Pass to properties for clean up
346 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 3, ( mlt_destructor
)mlt_pool_release
, NULL
);
349 pitches
[ 0 ] = 720 * 3;
351 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_rgb
, pixels
, pitches
);
355 *format
= mlt_image_rgb24
;
358 // Return the decoder
359 dv_decoder_return( decoder
);
364 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
368 int16_t *audio_channels
[ 4 ];
370 // Get the frames properties
371 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
374 dv_decoder_t
*decoder
= dv_decoder_alloc( );
377 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
379 // Parse the header for meta info
380 dv_parse_header( decoder
, dv_data
);
382 // Check that we have audio
383 if ( decoder
->audio
->num_channels
> 0 )
385 // Obtain required values
386 *frequency
= decoder
->audio
->frequency
;
387 *samples
= decoder
->audio
->samples_this_frame
;
388 *channels
= decoder
->audio
->num_channels
;
390 // Create a temporary workspace
391 for ( i
= 0; i
< 4; i
++ )
392 audio_channels
[ i
] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
394 // Create a workspace for the result
395 *buffer
= mlt_pool_alloc( *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
397 // Pass the allocated audio buffer as a property
398 mlt_properties_set_data( properties
, "audio", *buffer
, *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ), ( mlt_destructor
)mlt_pool_release
, NULL
);
401 dv_decode_full_audio( decoder
, dv_data
, audio_channels
);
403 // Interleave the audio
405 for ( i
= 0; i
< *samples
; i
++ )
406 for ( j
= 0; j
< *channels
; j
++ )
407 *p
++ = audio_channels
[ j
][ i
];
409 // Free the temporary work space
410 for ( i
= 0; i
< 4; i
++ )
411 mlt_pool_release( audio_channels
[ i
] );
415 // No audio available on the frame, so get test audio (silence)
416 mlt_frame_get_audio( this, buffer
, format
, frequency
, channels
, samples
);
419 // Return the decoder
420 dv_decoder_return( decoder
);
425 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
427 // Access the private data
428 producer_libdv
this = producer
->child
;
430 // Will carry the frame data
431 uint8_t *data
= NULL
;
433 // Obtain the current frame number
434 uint64_t position
= mlt_producer_frame( producer
);
436 if ( this->alternative
== NULL
)
438 // Convert timecode to a file position (ensuring that we're on a frame boundary)
439 uint64_t offset
= position
* this->frame_size
;
442 data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
444 // Create an empty frame
445 *frame
= mlt_frame_init( MLT_PRODUCER_SERVICE( producer
) );
448 if ( this->fd
!= 0 &&
449 lseek( this->fd
, offset
, SEEK_SET
) == offset
&&
450 read_frame( this->fd
, data
, &this->is_pal
) )
453 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", data
, FRAME_SIZE_625_50
, ( mlt_destructor
)mlt_pool_release
, NULL
);
457 mlt_pool_release( data
);
464 mlt_producer_seek( this->alternative
, position
);
467 mlt_service_get_frame( MLT_PRODUCER_SERVICE( this->alternative
), frame
, 0 );
470 if ( *frame
!= NULL
)
471 data
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", NULL
);
476 // Get the frames properties
477 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
480 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
482 mlt_properties_set_int( properties
, "test_image", 0 );
483 mlt_properties_set_int( properties
, "test_audio", 0 );
485 // Update other info on the frame
486 mlt_properties_set_int( properties
, "width", 720 );
487 mlt_properties_set_int( properties
, "height", this->is_pal ?
576 : 480 );
488 mlt_properties_set_int( properties
, "top_field_first", !this->is_pal ?
0 : ( data
[ 5 ] & 0x07 ) == 0 ?
0 : 1 );
490 // Parse the header for meta info
491 dv_parse_header( dv_decoder
, data
);
492 //mlt_properties_set_int( properties, "progressive", dv_is_progressive( dv_decoder ) );
493 mlt_properties_set_double( properties
, "aspect_ratio",
494 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 ) );
497 mlt_properties_set_int( properties
, "frequency", dv_decoder
->audio
->frequency
);
498 mlt_properties_set_int( properties
, "channels", dv_decoder
->audio
->num_channels
);
500 // Register audio callback
501 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( producer
), "audio_index" ) > 0 )
502 mlt_frame_push_audio( *frame
, producer_get_audio
);
504 if ( mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( producer
), "video_index" ) > -1 )
506 // Push the quality string
507 mlt_frame_push_service( *frame
, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "quality" ) );
509 // Push the get_image method on to the stack
510 mlt_frame_push_get_image( *frame
, producer_get_image
);
513 // Return the decoder
514 dv_decoder_return( dv_decoder
);
517 // Update timecode on the frame we're creating
518 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
520 // Calculate the next timecode
521 mlt_producer_prepare_next( producer
);
526 static void producer_close( mlt_producer parent
)
529 producer_libdv
this = parent
->child
;
535 if ( this->alternative
)
536 mlt_producer_close( this->alternative
);
539 parent
->close
= NULL
;
540 mlt_producer_close( parent
);