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_1
;
80 this->audio
->arg_audio_emphasis
= 2;
81 dv_set_audio_correction( this, DV_AUDIO_CORRECT_AVERAGE
);
83 // Register it with the properties to ensure clean up
84 // BUG: dv_decoder_free core dumps here
85 sprintf( label
, "%p", this );
86 //mlt_properties_set_data( dv_decoders, label, this, 0, ( mlt_destructor )dv_decoder_free, NULL );
87 mlt_properties_set_data( dv_decoders
, label
, this, 0, NULL
, NULL
);
92 pthread_mutex_unlock( &decoder_lock
);
97 void dv_decoder_return( dv_decoder_t
*this )
100 pthread_mutex_lock( &decoder_lock
);
102 // Now try to return the decoder
103 if ( dv_decoders
!= NULL
)
106 mlt_deque stack
= mlt_properties_get_data( dv_decoders
, "stack", NULL
);
109 mlt_deque_push_back( stack
, this );
113 pthread_mutex_unlock( &decoder_lock
);
117 typedef struct producer_libdv_s
*producer_libdv
;
119 struct producer_libdv_s
121 struct mlt_producer_s parent
;
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 )
140 mlt_producer producer
= &this->parent
;
141 mlt_properties properties
= mlt_producer_properties( producer
);
143 // Register transport implementation with the producer
144 producer
->close
= producer_close
;
146 // Register our get_frame implementation with the producer
147 producer
->get_frame
= producer_get_frame
;
149 // Open the file if specified
150 this->fd
= open( filename
, O_RDONLY
);
153 if ( this->fd
!= -1 && producer_collect_info( this ) )
155 // Set the resource property (required for all producers)
156 mlt_properties_set( properties
, "resource", filename
);
161 mlt_producer_close( producer
);
165 // Return the producer
172 static int read_frame( int fd
, uint8_t* frame_buf
, int *isPAL
)
174 int result
= read( fd
, frame_buf
, frame_size_525_60
) == frame_size_525_60
;
177 *isPAL
= ( frame_buf
[3] & 0x80 );
181 int diff
= frame_size_625_50
- frame_size_525_60
;
182 result
= read( fd
, frame_buf
+ frame_size_525_60
, diff
) == diff
;
189 static int producer_collect_info( producer_libdv
this )
193 uint8_t *dv_data
= mlt_pool_alloc( frame_size_625_50
);
195 if ( dv_data
!= NULL
)
197 // Read the first frame
198 valid
= read_frame( this->fd
, dv_data
, &this->is_pal
);
200 // If it looks like a valid frame, the get stats
203 // Get the properties
204 mlt_properties properties
= mlt_producer_properties( &this->parent
);
207 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
209 // Determine the file size
211 fstat( this->fd
, &buf
);
213 // Store the file size
214 this->file_size
= buf
.st_size
;
216 // Determine the frame size
217 this->frame_size
= this->is_pal ? frame_size_625_50
: frame_size_525_60
;
219 // Determine the number of frames in the file
220 this->frames_in_file
= this->file_size
/ this->frame_size
;
222 // Calculate default in/out points
223 double fps
= this->is_pal ?
25 : 30000.0 / 1001.0;
224 if ( mlt_properties_get_double( properties
, "fps" ) == fps
)
226 mlt_properties_set_position( properties
, "length", this->frames_in_file
);
227 mlt_properties_set_position( properties
, "in", 0 );
228 mlt_properties_set_position( properties
, "out", this->frames_in_file
- 1 );
235 // Parse the header for meta info
236 dv_parse_header( dv_decoder
, dv_data
);
237 mlt_properties_set_double( properties
, "aspect_ratio",
238 dv_format_wide( dv_decoder
) ?
( this->is_pal ?
512.0/351.0 : 96.0/79.0 ) : ( this->is_pal ?
128.0/117.0 : 72.0/79.0 ) );
240 // Return the decoder
241 dv_decoder_return( dv_decoder
);
244 mlt_pool_release( dv_data
);
250 static int producer_get_image( mlt_frame
this, uint8_t **buffer
, mlt_image_format
*format
, int *width
, int *height
, int writable
)
252 int pitches
[3] = { 0, 0, 0 };
253 uint8_t *pixels
[3] = { NULL
, NULL
, NULL
};
255 // Get the frames properties
256 mlt_properties properties
= mlt_frame_properties( this );
259 dv_decoder_t
*decoder
= dv_decoder_alloc( );
262 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
264 // Get and set the quality request
265 char *quality
= mlt_frame_pop_service( this );
267 if ( quality
!= NULL
)
269 if ( strncmp( quality
, "fast", 4 ) == 0 )
270 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_DC
);
271 else if ( strncmp( quality
, "best", 4 ) == 0 )
272 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_2
);
274 decoder
->quality
= ( DV_QUALITY_COLOR
| DV_QUALITY_AC_1
);
277 // Parse the header for meta info
278 dv_parse_header( decoder
, dv_data
);
280 // Assign width and height from properties
281 *width
= mlt_properties_get_int( properties
, "width" );
282 *height
= mlt_properties_get_int( properties
, "height" );
284 // Extract an image of the format requested
285 if ( *format
== mlt_image_yuv422
)
288 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 2 );
290 // Pass to properties for clean up
291 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 2, ( mlt_destructor
)mlt_pool_release
, NULL
);
294 pitches
[ 0 ] = *width
* 2;
296 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_yuv
, pixels
, pitches
);
301 else if ( *format
== mlt_image_rgb24
)
304 uint8_t *image
= mlt_pool_alloc( *width
* ( *height
+ 1 ) * 3 );
306 // Pass to properties for clean up
307 mlt_properties_set_data( properties
, "image", image
, *width
* ( *height
+ 1 ) * 3, ( mlt_destructor
)mlt_pool_release
, NULL
);
310 pitches
[ 0 ] = 720 * 3;
312 dv_decode_full_frame( decoder
, dv_data
, e_dv_color_rgb
, pixels
, pitches
);
318 // Return the decoder
319 dv_decoder_return( decoder
);
324 static int producer_get_audio( mlt_frame
this, int16_t **buffer
, mlt_audio_format
*format
, int *frequency
, int *channels
, int *samples
)
328 int16_t *audio_channels
[ 4 ];
330 // Get the frames properties
331 mlt_properties properties
= mlt_frame_properties( this );
334 dv_decoder_t
*decoder
= dv_decoder_alloc( );
337 uint8_t *dv_data
= mlt_properties_get_data( properties
, "dv_data", NULL
);
339 // Parse the header for meta info
340 dv_parse_header( decoder
, dv_data
);
342 // Check that we have audio
343 if ( decoder
->audio
->num_channels
> 0 )
345 // Obtain required values
346 *frequency
= decoder
->audio
->frequency
;
347 *samples
= decoder
->audio
->samples_this_frame
;
348 *channels
= decoder
->audio
->num_channels
;
350 // Create a temporary workspace
351 for ( i
= 0; i
< 4; i
++ )
352 audio_channels
[ i
] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
354 // Create a workspace for the result
355 *buffer
= mlt_pool_alloc( *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ) );
357 // Pass the allocated audio buffer as a property
358 mlt_properties_set_data( properties
, "audio", *buffer
, *channels
* DV_AUDIO_MAX_SAMPLES
* sizeof( int16_t ), ( mlt_destructor
)mlt_pool_release
, NULL
);
361 dv_decode_full_audio( decoder
, dv_data
, audio_channels
);
363 // Interleave the audio
365 for ( i
= 0; i
< *samples
; i
++ )
366 for ( j
= 0; j
< *channels
; j
++ )
367 *p
++ = audio_channels
[ j
][ i
];
369 // Free the temporary work space
370 for ( i
= 0; i
< 4; i
++ )
371 mlt_pool_release( audio_channels
[ i
] );
375 // No audio available on the frame, so get test audio (silence)
376 this->get_audio
= NULL
;
377 mlt_frame_get_audio( this, buffer
, format
, frequency
, channels
, samples
);
380 // Return the decoder
381 dv_decoder_return( decoder
);
386 static int producer_get_frame( mlt_producer producer
, mlt_frame_ptr frame
, int index
)
388 producer_libdv
this = producer
->child
;
389 uint8_t *data
= mlt_pool_alloc( frame_size_625_50
);
391 // Obtain the current frame number
392 uint64_t position
= mlt_producer_frame( producer
);
394 // Convert timecode to a file position (ensuring that we're on a frame boundary)
395 uint64_t offset
= position
* this->frame_size
;
397 // Create an empty frame
398 *frame
= mlt_frame_init( );
401 if ( this->fd
!= 0 &&
402 lseek( this->fd
, offset
, SEEK_SET
) == offset
&&
403 read_frame( this->fd
, data
, &this->is_pal
) )
405 // Get the frames properties
406 mlt_properties properties
= mlt_frame_properties( *frame
);
409 dv_decoder_t
*dv_decoder
= dv_decoder_alloc( );
412 mlt_properties_set_data( properties
, "dv_data", data
, frame_size_625_50
, ( mlt_destructor
)mlt_pool_release
, NULL
);
414 // Update other info on the frame
415 mlt_properties_set_int( properties
, "width", 720 );
416 mlt_properties_set_int( properties
, "height", this->is_pal ?
576 : 480 );
417 mlt_properties_set_int( properties
, "top_field_first", 0 );
419 // Parse the header for meta info
420 dv_parse_header( dv_decoder
, data
);
421 mlt_properties_set_int( properties
, "progressive", dv_is_progressive( dv_decoder
) );
422 mlt_properties_set_double( properties
, "aspect_ratio",
423 dv_format_wide( dv_decoder
) ?
( this->is_pal ?
512.0/351.0 : 96.0/79.0 ) : ( this->is_pal ?
128.0/117.0 : 72.0/79.0 ) );
425 // Hmm - register audio callback
426 ( *frame
)->get_audio
= producer_get_audio
;
428 // Push the quality string
429 mlt_frame_push_service( *frame
, mlt_properties_get( mlt_producer_properties( producer
), "quality" ) );
431 // Push the get_image method on to the stack
432 mlt_frame_push_get_image( *frame
, producer_get_image
);
434 // Return the decoder
435 dv_decoder_return( dv_decoder
);
439 mlt_pool_release( data
);
442 // Update timecode on the frame we're creating
443 mlt_frame_set_position( *frame
, mlt_producer_position( producer
) );
445 // Calculate the next timecode
446 mlt_producer_prepare_next( producer
);
451 static void producer_close( mlt_producer parent
)
454 producer_libdv
this = parent
->child
;
461 parent
->close
= NULL
;
462 mlt_producer_close( parent
);