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
;
128 static int producer_get_frame( mlt_producer parent
, mlt_frame_ptr frame
, int index
);
129 static void producer_close( mlt_producer parent
);
131 static int producer_collect_info( producer_libdv
this );
133 mlt_producer
producer_libdv_init( char *filename
)
135 producer_libdv
this = calloc( sizeof( struct producer_libdv_s
), 1 );
137 if ( filename
!= NULL
&& this != NULL
&& mlt_producer_init( &this->parent
, this ) == 0 )
139 mlt_producer producer
= &this->parent
;
140 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( producer
);
142 // Register transport implementation with the producer
143 producer
->close
= ( mlt_destructor
)producer_close
;
145 // Register our get_frame implementation with the producer
146 producer
->get_frame
= producer_get_frame
;
148 // Open the file if specified
149 this->fd
= open( filename
, O_RDONLY
);
152 if ( this->fd
!= -1 && producer_collect_info( this ) )
154 // Set the resource property (required for all producers)
155 mlt_properties_set( properties
, "resource", filename
);
160 mlt_producer_close( producer
);
164 // Return the producer
171 static int read_frame( int fd
, uint8_t* frame_buf
, int *isPAL
)
173 int result
= read( fd
, frame_buf
, FRAME_SIZE_525_60
) == FRAME_SIZE_525_60
;
176 *isPAL
= ( frame_buf
[3] & 0x80 );
180 int diff
= FRAME_SIZE_625_50
- FRAME_SIZE_525_60
;
181 result
= read( fd
, frame_buf
+ FRAME_SIZE_525_60
, diff
) == diff
;
188 static int producer_collect_info( producer_libdv
this )
192 uint8_t *dv_data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
194 if ( dv_data
!= NULL
)
196 // Read the first frame
197 valid
= read_frame( this->fd
, dv_data
, &this->is_pal
);
199 // If it looks like a valid frame, the get stats
202 // Get the properties
203 mlt_properties properties
= MLT_PRODUCER_PROPERTIES( &this->parent
);
206 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
208 // Determine the file size
210 fstat( this->fd
, &buf
);
212 // Store the file size
213 this->file_size
= buf
.st_size
;
215 // Determine the frame size
216 this->frame_size
= this->is_pal ? FRAME_SIZE_625_50
: FRAME_SIZE_525_60
;
218 // Determine the number of frames in the file
219 this->frames_in_file
= this->file_size
/ this->frame_size
;
221 // Calculate default in/out points
222 double fps
= this->is_pal ?
25 : 30000.0 / 1001.0;
223 if ( mlt_properties_get_double( properties
, "fps" ) == fps
)
225 if ( this->frames_in_file
> 0 )
227 mlt_properties_set_position( properties
, "length", this->frames_in_file
);
228 mlt_properties_set_position( properties
, "in", 0 );
229 mlt_properties_set_position( properties
, "out", this->frames_in_file
- 1 );
237 // Parse the header for meta info
238 dv_parse_header( dv_decoder
, dv_data
);
239 mlt_properties_set_double( properties
, "aspect_ratio",
240 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 ) );
242 // Return the decoder
243 dv_decoder_return( dv_decoder
);
246 mlt_pool_release( dv_data
);
252 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
254 int pitches
[3] = { 0, 0, 0 };
255 uint8_t *pixels
[3] = { NULL
, NULL
, NULL
};
257 // Get the frames properties
258 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
261 dv_decoder_t
*decoder
= dv_decoder_alloc( );
264 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
266 // Get and set the quality request
267 char *quality
= mlt_frame_pop_service( this );
269 if ( quality
!= NULL
)
271 if ( strncmp( quality
, "fast", 4 ) == 0 )
272 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_DC
);
273 else if ( strncmp( quality
, "best", 4 ) == 0 )
274 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_2
);
276 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_1
);
279 // Parse the header for meta info
280 dv_parse_header( decoder
, dv_data
);
282 // Assign width and height from properties
283 *width
= mlt_properties_get_int( properties
, "width" );
284 *height
= mlt_properties_get_int( properties
, "height" );
286 // Extract an image of the format requested
287 if ( *format
== mlt_image_yuv422
)
290 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
292 // Pass to properties for clean up
293 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
296 pitches
[ 0 ] = *width
* 2;
298 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_yuv
, pixels
, pitches
);
303 else if ( *format
== mlt_image_rgb24
)
306 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 3 );
308 // Pass to properties for clean up
309 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 3, ( mlt_destructor
)mlt_pool_release
, NULL
);
312 pitches
[ 0 ] = 720 * 3;
314 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_rgb
, pixels
, pitches
);
320 // Return the decoder
321 dv_decoder_return( decoder
);
326 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
330 int16_t *audio_channels
[ 4 ];
332 // Get the frames properties
333 mlt_properties properties
= MLT_FRAME_PROPERTIES( this );
336 dv_decoder_t
*decoder
= dv_decoder_alloc( );
339 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
341 // Parse the header for meta info
342 dv_parse_header( decoder
, dv_data
);
344 // Check that we have audio
345 if ( decoder
->audio
->num_channels
> 0 )
347 // Obtain required values
348 *frequency
= decoder
->audio
->frequency
;
349 *samples
= decoder
->audio
->samples_this_frame
;
350 *channels
= decoder
->audio
->num_channels
;
352 // Create a temporary workspace
353 for ( i
= 0; i
< 4; i
++ )
354 audio_channels
[ i
] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
356 // Create a workspace for the result
357 *buffer
= mlt_pool_alloc( *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
359 // Pass the allocated audio buffer as a property
360 mlt_properties_set_data( properties
, "audio", *buffer
, *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ), ( mlt_destructor
)mlt_pool_release
, NULL
);
363 dv_decode_full_audio( decoder
, dv_data
, audio_channels
);
365 // Interleave the audio
367 for ( i
= 0; i
< *samples
; i
++ )
368 for ( j
= 0; j
< *channels
; j
++ )
369 *p
++ = audio_channels
[ j
][ i
];
371 // Free the temporary work space
372 for ( i
= 0; i
< 4; i
++ )
373 mlt_pool_release( audio_channels
[ i
] );
377 // No audio available on the frame, so get test audio (silence)
378 mlt_frame_get_audio( this, buffer
, format
, frequency
, channels
, samples
);
381 // Return the decoder
382 dv_decoder_return( decoder
);
387 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
389 producer_libdv
this = producer
->child
;
390 uint8_t *data
= mlt_pool_alloc( FRAME_SIZE_625_50
);
392 // Obtain the current frame number
393 uint64_t position
= mlt_producer_frame( producer
);
395 // Convert timecode to a file position (ensuring that we're on a frame boundary)
396 uint64_t offset
= position
* this->frame_size
;
398 // Create an empty frame
399 *frame
= mlt_frame_init( );
402 if ( this->fd
!= 0 &&
403 lseek( this->fd
, offset
, SEEK_SET
) == offset
&&
404 read_frame( this->fd
, data
, &this->is_pal
) )
406 // Get the frames properties
407 mlt_properties properties
= MLT_FRAME_PROPERTIES( *frame
);
410 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
413 mlt_properties_set_data( properties
, "dv_data", data
, FRAME_SIZE_625_50
, ( mlt_destructor
)mlt_pool_release
, NULL
);
415 // Update other info on the frame
416 mlt_properties_set_int( properties
, "width", 720 );
417 mlt_properties_set_int( properties
, "height", this->is_pal ?
576 : 480 );
418 mlt_properties_set_int( properties
, "top_field_first", !this->is_pal ?
0 : ( data
[ 5 ] & 0x07 ) == 0 ?
0 : 1 );
420 // Parse the header for meta info
421 dv_parse_header( dv_decoder
, data
);
422 //mlt_properties_set_int( properties, "progressive", dv_is_progressive( dv_decoder ) );
423 mlt_properties_set_double( properties
, "aspect_ratio",
424 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 ) );
426 // Hmm - register audio callback
427 mlt_frame_push_audio( *frame
, producer_get_audio
);
429 // Push the quality string
430 mlt_frame_push_service( *frame
, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer
), "quality" ) );
432 // Push the get_image method on to the stack
433 mlt_frame_push_get_image( *frame
, producer_get_image
);
435 // Return the decoder
436 dv_decoder_return( dv_decoder
);
440 mlt_pool_release( data
);
443 // Update timecode on the frame we're creating
444 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
446 // Calculate the next timecode
447 mlt_producer_prepare_next( producer
);
452 static void producer_close( mlt_producer parent
)
455 producer_libdv
this = parent
->child
;
462 parent
->close
= NULL
;
463 mlt_producer_close( parent
);