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 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.
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.
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.
21 #include "producer_libdv.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 /** To conserve resources, we maintain a stack of dv decoders.
38 static pthread_mutex_t decoder_lock
= PTHREAD_MUTEX_INITIALIZER
;
39 static mlt_properties dv_decoders
= NULL
;
41 dv_decoder_t
*dv_decoder_alloc( )
43 // We'll return a dv_decoder
44 dv_decoder_t
*this = NULL
;
47 pthread_mutex_lock( &decoder_lock
);
49 // Create the properties if necessary
50 if ( dv_decoders
== NULL
)
52 // Create the properties
53 dv_decoders
= mlt_properties_new( );
56 mlt_properties_set_data( dv_decoders
, "stack", mlt_deque_init( ), 0, ( mlt_destructor
)mlt_deque_close
, NULL
);
58 // Register the properties for clean up
59 mlt_factory_register_for_clean_up( dv_decoders
, ( mlt_destructor
)mlt_properties_close
);
62 // Now try to obtain a decoder
63 if ( dv_decoders
!= NULL
)
66 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
68 // Pop the top of the stack
69 this = mlt_deque_pop_back( stack
);
71 // Create a new decoder if none available
74 // We'll need a unique property ID for this
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
);
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
);
91 pthread_mutex_unlock( &decoder_lock
);
96 void dv_decoder_return( dv_decoder_t
*this )
99 pthread_mutex_lock( &decoder_lock
);
101 // Now try to return the decoder
102 if ( dv_decoders
!= NULL
)
105 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
108 mlt_deque_push_back( stack
, this );
112 pthread_mutex_unlock( &decoder_lock
);
116 typedef struct producer_libdv_s
*producer_libdv
;
118 struct producer_libdv_s
120 struct mlt_producer_s parent
;
126 mlt_producer alternative
;
129 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
130 static void producer_close( mlt_producer parent
);
132 static int producer_collect_info( producer_libdv
this );
134 mlt_producer
producer_libdv_init( char *filename
)
136 producer_libdv
this = calloc( sizeof( struct producer_libdv_s
), 1 );
138 if ( filename
!= NULL
&& this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
141 mlt_producer producer
= &this->parent
;
142 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
144 // Set the resource property (required for all producers)
145 mlt_properties_set( properties
, "resource", filename
);
147 // Register transport implementation with the producer
148 producer
->close
= ( mlt_destructor
)producer_close
;
150 // Register our get_frame implementation with the producer
151 producer
->get_frame
= producer_get_frame
;
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 ) )
158 // Load via an alternative mechanism
159 this->alternative
= mlt_factory_producer( "kino", filename
);
161 // If it's unavailable, then clean up
162 if ( this->alternative
== NULL
)
165 mlt_properties_pass( properties
, MLT_PRODUCER_PROPERTIES( this->alternative
), "" );
166 this->is_pal
= mlt_properties_get_int( properties
, "fps" ) == 25;
170 // Open the file if specified
171 this->fd
= open( filename
, O_RDONLY
);
174 if ( this->fd
== -1 || !producer_collect_info( this ) )
178 // If we couldn't open the file, then destroy it now
181 mlt_producer_close( producer
);
185 // Return the producer
192 static int read_frame( int fd
, uint8_t* frame_buf
, int *isPAL
)
194 int result
= read( fd
, frame_buf
, FRAME_SIZE_525_60
) == FRAME_SIZE_525_60
;
197 *isPAL
= ( frame_buf
[3] & 0x80 );
201 int diff
= FRAME_SIZE_625_50
- FRAME_SIZE_525_60
;
202 result
= read( fd
, frame_buf
+ FRAME_SIZE_525_60
, diff
) == diff
;
209 static int producer_collect_info( producer_libdv
this )
213 uint8_t *dv_data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
215 if ( dv_data
!= NULL
)
217 // Read the first frame
218 valid
= read_frame( this->fd
, dv_data
, &this->is_pal
);
220 // If it looks like a valid frame, the get stats
223 // Get the properties
224 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
227 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
229 // Determine the file size
231 fstat( this->fd
, &buf
);
233 // Store the file size
234 this->file_size
= buf
.st_size
;
236 // Determine the frame size
237 this->frame_size
= this->is_pal ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
239 // Determine the number of frames in the file
240 this->frames_in_file
= this->file_size
/ this->frame_size
;
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
)
246 if ( this->frames_in_file
> 0 )
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 );
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 ) );
263 // Return the decoder
264 dv_decoder_return( dv_decoder
);
267 mlt_pool_release( dv_data
);
273 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
275 int pitches
[3] = { 0, 0, 0 };
276 uint8_t *pixels
[3] = { NULL
, NULL
, NULL
};
278 // Get the frames properties
279 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
282 dv_decoder_t
*decoder
= dv_decoder_alloc( );
285 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
287 // Get and set the quality request
288 char *quality
= mlt_frame_pop_service( this );
290 if ( quality
!= NULL
)
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
);
297 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_1
);
300 // Parse the header for meta info
301 dv_parse_header( decoder
, dv_data
);
303 // Assign width and height according to the frame
305 *height
= dv_data
[ 3 ] & 0x80 ?
576 : 480;
307 // Extract an image of the format requested
308 if ( *format
== mlt_image_yuv422
)
311 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
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
);
317 pitches
[ 0 ] = *width
* 2;
319 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_yuv
, pixels
, pitches
);
324 else if ( *format
== mlt_image_rgb24
)
327 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 3 );
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
);
333 pitches
[ 0 ] = 720 * 3;
335 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_rgb
, pixels
, pitches
);
341 // Return the decoder
342 dv_decoder_return( decoder
);
347 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
351 int16_t *audio_channels
[ 4 ];
353 // Get the frames properties
354 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
357 dv_decoder_t
*decoder
= dv_decoder_alloc( );
360 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
362 // Parse the header for meta info
363 dv_parse_header( decoder
, dv_data
);
365 // Check that we have audio
366 if ( decoder
->audio
->num_channels
> 0 )
368 // Obtain required values
369 *frequency
= decoder
->audio
->frequency
;
370 *samples
= decoder
->audio
->samples_this_frame
;
371 *channels
= decoder
->audio
->num_channels
;
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 ) );
377 // Create a workspace for the result
378 *buffer
= mlt_pool_alloc( *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
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
);
384 dv_decode_full_audio( decoder
, dv_data
, audio_channels
);
386 // Interleave the audio
388 for ( i
= 0; i
< *samples
; i
++ )
389 for ( j
= 0; j
< *channels
; j
++ )
390 *p
++ = audio_channels
[ j
][ i
];
392 // Free the temporary work space
393 for ( i
= 0; i
< 4; i
++ )
394 mlt_pool_release( audio_channels
[ i
] );
398 // No audio available on the frame, so get test audio (silence)
399 mlt_frame_get_audio( this, buffer
, format
, frequency
, channels
, samples
);
402 // Return the decoder
403 dv_decoder_return( decoder
);
408 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
410 // Access the private data
411 producer_libdv
this = producer
->child
;
413 // Will carry the frame data
414 uint8_t *data
= NULL
;
416 // Obtain the current frame number
417 uint64_t position
= mlt_producer_frame( producer
);
419 if ( this->alternative
== NULL
)
421 // Convert timecode to a file position (ensuring that we're on a frame boundary)
422 uint64_t offset
= position
* this->frame_size
;
425 data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
427 // Create an empty frame
428 *frame
= mlt_frame_init( );
431 if ( this->fd
!= 0 &&
432 lseek( this->fd
, offset
, SEEK_SET
) == offset
&&
433 read_frame( this->fd
, data
, &this->is_pal
) )
436 mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", data
, FRAME_SIZE_625_50
, ( mlt_destructor
)mlt_pool_release
, NULL
);
440 mlt_pool_release( data
);
447 mlt_producer_seek( this->alternative
, position
);
450 mlt_service_get_frame( MLT_PRODUCER_SERVICE( this->alternative
), frame
, 0 );
453 if ( *frame
!= NULL
)
454 data
= mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame
), "dv_data", NULL
);
459 // Get the frames properties
460 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
463 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
465 mlt_properties_set_int( properties
, "test_image", 0 );
466 mlt_properties_set_int( properties
, "test_audio", 0 );
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 );
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 ) );
479 // Hmm - register audio callback
480 mlt_frame_push_audio( *frame
, producer_get_audio
);
482 // Push the quality string
483 mlt_frame_push_service( *frame
, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "quality" ) );
485 // Push the get_image method on to the stack
486 mlt_frame_push_get_image( *frame
, producer_get_image
);
488 // Return the decoder
489 dv_decoder_return( dv_decoder
);
492 // Update timecode on the frame we're creating
493 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
495 // Calculate the next timecode
496 mlt_producer_prepare_next( producer
);
501 static void producer_close( mlt_producer parent
)
504 producer_libdv
this = parent
->child
;
510 if ( this->alternative
)
511 mlt_producer_close( this->alternative
);
514 parent
->close
= NULL
;
515 mlt_producer_close( parent
);