git.sesse.net Git - mlt/blob - src/modules/dv/producer_libdv.c

   1 /*
   2  * producer_libdv.c -- simple libdv test case
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Charles Yates <charles.yates@pandora.be>
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "producer_libdv.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_deque.h>
  24 #include <framework/mlt_factory.h>
  25 #include <pthread.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <libdv/dv.h>
  30 #include <unistd.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <fcntl.h>
  34
  35 /** To conserve resources, we maintain a stack of dv decoders.
  36 */
  37
  38 static pthread_mutex_t decoder_lock = PTHREAD_MUTEX_INITIALIZER;
  39 static mlt_properties dv_decoders = NULL;
  40
  41 dv_decoder_t *dv_decoder_alloc( )
  42 {
  43         // We'll return a dv_decoder
  44         dv_decoder_t *this = NULL;
  45
  46         // Lock the mutex
  47         pthread_mutex_lock( &decoder_lock );
  48
  49         // Create the properties if necessary
  50         if ( dv_decoders == NULL )
  51         {
  52                 // Create the properties
  53                 dv_decoders = mlt_properties_new( );
  54
  55                 // Create the stack
  56                 mlt_properties_set_data( dv_decoders, "stack", mlt_deque_init( ), 0, ( mlt_destructor )mlt_deque_close, NULL );
  57
  58                 // Register the properties for clean up
  59                 mlt_factory_register_for_clean_up( dv_decoders, ( mlt_destructor )mlt_properties_close );
  60         }
  61
  62         // Now try to obtain a decoder
  63         if ( dv_decoders != NULL )
  64         {
  65                 // Obtain the stack
  66                 mlt_deque stack = mlt_properties_get_data( dv_decoders, "stack", NULL );
  67
  68                 // Pop the top of the stack
  69                 this = mlt_deque_pop_back( stack );
  70
  71                 // Create a new decoder if none available
  72                 if ( this == NULL )
  73                 {
  74                         // We'll need a unique property ID for this
  75                         char label[ 256 ];
  76
  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 );
  83
  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 );
  87                 }
  88         }
  89
  90         // Unlock the mutex
  91         pthread_mutex_unlock( &decoder_lock );
  92
  93         return this;
  94 }
  95
  96 void dv_decoder_return( dv_decoder_t *this )
  97 {
  98         // Lock the mutex
  99         pthread_mutex_lock( &decoder_lock );
 100
 101         // Now try to return the decoder
 102         if ( dv_decoders != NULL )
 103         {
 104                 // Obtain the stack
 105                 mlt_deque stack = mlt_properties_get_data( dv_decoders, "stack", NULL );
 106
 107                 // Push it back
 108                 mlt_deque_push_back( stack, this );
 109         }
 110
 111         // Unlock the mutex
 112         pthread_mutex_unlock( &decoder_lock );
 113 }
 114
 115
 116 typedef struct producer_libdv_s *producer_libdv;
 117
 118 struct producer_libdv_s
 119 {
 120         struct mlt_producer_s parent;
 121         int fd;
 122         int is_pal;
 123         uint64_t file_size;
 124         int frame_size;
 125         long frames_in_file;
 126         mlt_producer alternative;
 127 };
 128
 129 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
 130 static void producer_close( mlt_producer parent );
 131
 132 static int producer_collect_info( producer_libdv this );
 133
 134 mlt_producer producer_libdv_init( char *filename )
 135 {
 136         producer_libdv this = calloc( sizeof( struct producer_libdv_s ), 1 );
 137
 138         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
 139         {
 140                 int destroy = 0;
 141                 mlt_producer producer = &this->parent;
 142                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 143
 144                 // Set the resource property (required for all producers)
 145                 mlt_properties_set( properties, "resource", filename );
 146
 147                 // Register transport implementation with the producer
 148                 producer->close = ( mlt_destructor )producer_close;
 149
 150                 // Register our get_frame implementation with the producer
 151                 producer->get_frame = producer_get_frame;
 152
 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 ) )
 157                 {
 158                         // Load via an alternative mechanism
 159                         this->alternative = mlt_factory_producer( "kino", filename );
 160
 161                         // If it's unavailable, then clean up
 162                         if ( this->alternative == NULL )
 163                                 destroy = 1;
 164                         else
 165                                 mlt_properties_pass( properties, MLT_PRODUCER_PROPERTIES( this->alternative ), "" );
 166                         this->is_pal = ( ( int ) mlt_producer_get_fps( producer ) ) == 25;
 167                 }
 168                 else
 169                 {
 170                         // Open the file if specified
 171                         this->fd = open( filename, O_RDONLY );
 172
 173                         // Collect info
 174                         if ( this->fd == -1 || !producer_collect_info( this ) )
 175                                 destroy = 1;
 176                 }
 177
 178                 // If we couldn't open the file, then destroy it now
 179                 if ( destroy )
 180                 {
 181                         mlt_producer_close( producer );
 182                         producer = NULL;
 183                 }
 184
 185                 // Return the producer
 186                 return producer;
 187         }
 188         free( this );
 189         return NULL;
 190 }
 191
 192 static int read_frame( int fd, uint8_t* frame_buf, int *isPAL )
 193 {
 194         int result = read( fd, frame_buf, FRAME_SIZE_525_60 ) == FRAME_SIZE_525_60;
 195         if ( result )
 196         {
 197                 *isPAL = ( frame_buf[3] & 0x80 );
 198
 199                 if ( *isPAL )
 200                 {
 201                         int diff = FRAME_SIZE_625_50 - FRAME_SIZE_525_60;
 202                         result = read( fd, frame_buf + FRAME_SIZE_525_60, diff ) == diff;
 203                 }
 204         }
 205
 206         return result;
 207 }
 208
 209 static int producer_collect_info( producer_libdv this )
 210 {
 211         int valid = 0;
 212
 213         uint8_t *dv_data = mlt_pool_alloc( FRAME_SIZE_625_50 );
 214
 215         if ( dv_data != NULL )
 216         {
 217                 // Read the first frame
 218                 valid = read_frame( this->fd, dv_data, &this->is_pal );
 219
 220                 // If it looks like a valid frame, the get stats
 221                 if ( valid )
 222                 {
 223                         // Get the properties
 224                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
 225
 226                         // Get a dv_decoder
 227                         dv_decoder_t *dv_decoder = dv_decoder_alloc( );
 228
 229                         // Determine the file size
 230                         struct stat buf;
 231                         fstat( this->fd, &buf );
 232
 233                         // Store the file size
 234                         this->file_size = buf.st_size;
 235
 236                         // Determine the frame size
 237                         this->frame_size = this->is_pal ? FRAME_SIZE_625_50 : FRAME_SIZE_525_60;
 238
 239                         // Determine the number of frames in the file
 240                         this->frames_in_file = this->file_size / this->frame_size;
 241
 242                         // Calculate default in/out points
 243                         double fps = this->is_pal ? 25 : 30000.0 / 1001.0;
 244                         if ( mlt_producer_get_fps( &this->parent ) == fps )
 245                         {
 246                                 if ( this->frames_in_file > 0 )
 247                                 {
 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 );
 251                                 }
 252                         }
 253                         else
 254                         {
 255                                 valid = 0;
 256                         }
 257
 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 ) );
 262
 263                         // Return the decoder
 264                         dv_decoder_return( dv_decoder );
 265                 }
 266
 267                 mlt_pool_release( dv_data );
 268         }
 269
 270         return valid;
 271 }
 272
 273 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 274 {
 275         int pitches[3] = { 0, 0, 0 };
 276         uint8_t *pixels[3] = { NULL, NULL, NULL };
 277
 278         // Get the frames properties
 279         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 280
 281         // Get a dv_decoder
 282         dv_decoder_t *decoder = dv_decoder_alloc( );
 283
 284         // Get the dv data
 285         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
 286
 287         // Get and set the quality request
 288         char *quality = mlt_frame_pop_service( this );
 289
 290         if ( quality != NULL )
 291         {
 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 );
 296                 else
 297                         decoder->quality = ( DV_QUALITY_COLOR | DV_QUALITY_AC_1 );
 298         }
 299
 300         // Parse the header for meta info
 301         dv_parse_header( decoder, dv_data );
 302
 303         // Assign width and height according to the frame
 304         *width = 720;
 305         *height = dv_data[ 3 ] & 0x80 ? 576 : 480;
 306
 307         // Extract an image of the format requested
 308         if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
 309         {
 310                 // Allocate an image
 311                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 2 );
 312
 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 );
 315
 316                 // Decode the image
 317                 pitches[ 0 ] = *width * 2;
 318                 pixels[ 0 ] = image;
 319                 dv_decode_full_frame( decoder, dv_data, e_dv_color_yuv, pixels, pitches );
 320
 321                 // Assign result
 322                 *buffer = image;
 323                 *format = mlt_image_yuv422;
 324         }
 325         else
 326         {
 327                 // Allocate an image
 328                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 3 );
 329
 330                 // Pass to properties for clean up
 331                 mlt_properties_set_data( properties, "image", image, *width * ( *height + 1 ) * 3, ( mlt_destructor )mlt_pool_release, NULL );
 332
 333                 // Decode the frame
 334                 pitches[ 0 ] = 720 * 3;
 335                 pixels[ 0 ] = image;
 336                 dv_decode_full_frame( decoder, dv_data, e_dv_color_rgb, pixels, pitches );
 337
 338                 // Assign result
 339                 *buffer = image;
 340                 *format = mlt_image_rgb24;
 341         }
 342
 343         // Return the decoder
 344         dv_decoder_return( decoder );
 345
 346         return 0;
 347 }
 348
 349 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 350 {
 351         int16_t *p;
 352         int i, j;
 353         int16_t *audio_channels[ 4 ];
 354
 355         // Get the frames properties
 356         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 357
 358         // Get a dv_decoder
 359         dv_decoder_t *decoder = dv_decoder_alloc( );
 360
 361         // Get the dv data
 362         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
 363
 364         // Parse the header for meta info
 365         dv_parse_header( decoder, dv_data );
 366
 367         // Check that we have audio
 368         if ( decoder->audio->num_channels > 0 )
 369         {
 370                 // Obtain required values
 371                 *frequency = decoder->audio->frequency;
 372                 *samples = decoder->audio->samples_this_frame;
 373                 *channels = decoder->audio->num_channels;
 374
 375                 // Create a temporary workspace
 376                 for ( i = 0; i < 4; i++ )
 377                         audio_channels[ i ] = mlt_pool_alloc( DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ) );
 378
 379                 // Create a workspace for the result
 380                 *buffer = mlt_pool_alloc( *channels * DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ) );
 381
 382                 // Pass the allocated audio buffer as a property
 383                 mlt_properties_set_data( properties, "audio", *buffer, *channels * DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ), ( mlt_destructor )mlt_pool_release, NULL );
 384
 385                 // Decode the audio
 386                 dv_decode_full_audio( decoder, dv_data, audio_channels );
 387
 388                 // Interleave the audio
 389                 p = *buffer;
 390                 for ( i = 0; i < *samples; i++ )
 391                         for ( j = 0; j < *channels; j++ )
 392                                 *p++ = audio_channels[ j ][ i ];
 393
 394                 // Free the temporary work space
 395                 for ( i = 0; i < 4; i++ )
 396                         mlt_pool_release( audio_channels[ i ] );
 397         }
 398         else
 399         {
 400                 // No audio available on the frame, so get test audio (silence)
 401                 mlt_frame_get_audio( this, buffer, format, frequency, channels, samples );
 402         }
 403
 404         // Return the decoder
 405         dv_decoder_return( decoder );
 406
 407         return 0;
 408 }
 409
 410 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 411 {
 412         // Access the private data
 413         producer_libdv this = producer->child;
 414
 415         // Will carry the frame data
 416         uint8_t *data = NULL;
 417
 418         // Obtain the current frame number
 419         uint64_t position = mlt_producer_frame( producer );
 420
 421         if ( this->alternative == NULL )
 422         {
 423                 // Convert timecode to a file position (ensuring that we're on a frame boundary)
 424                 uint64_t offset = position * this->frame_size;
 425
 426                 // Allocate space
 427                 data = mlt_pool_alloc( FRAME_SIZE_625_50 );
 428
 429                 // Create an empty frame
 430                 *frame = mlt_frame_init( );
 431
 432                 // Seek and fetch
 433                 if ( this->fd != 0 &&
 434                          lseek( this->fd, offset, SEEK_SET ) == offset &&
 435                          read_frame( this->fd, data, &this->is_pal ) )
 436                 {
 437                         // Pass the dv data
 438                         mlt_properties_set_data( MLT_FRAME_PROPERTIES( *frame ), "dv_data", data, FRAME_SIZE_625_50, ( mlt_destructor )mlt_pool_release, NULL );
 439                 }
 440                 else
 441                 {
 442                         mlt_pool_release( data );
 443                         data = NULL;
 444                 }
 445         }
 446         else
 447         {
 448                 // Seek
 449                 mlt_producer_seek( this->alternative, position );
 450
 451                 // Fetch
 452                 mlt_service_get_frame( MLT_PRODUCER_SERVICE( this->alternative ), frame, 0 );
 453
 454                 // Verify
 455                 if ( *frame != NULL )
 456                         data = mlt_properties_get_data( MLT_FRAME_PROPERTIES( *frame ), "dv_data", NULL );
 457         }
 458
 459         if ( data != NULL )
 460         {
 461                 // Get the frames properties
 462                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 463
 464                 // Get a dv_decoder
 465                 dv_decoder_t *dv_decoder = dv_decoder_alloc( );
 466
 467                 mlt_properties_set_int( properties, "test_image", 0 );
 468                 mlt_properties_set_int( properties, "test_audio", 0 );
 469
 470                 // Update other info on the frame
 471                 mlt_properties_set_int( properties, "width", 720 );
 472                 mlt_properties_set_int( properties, "height", this->is_pal ? 576 : 480 );
 473                 mlt_properties_set_int( properties, "top_field_first", !this->is_pal ? 0 : ( data[ 5 ] & 0x07 ) == 0 ? 0 : 1 );
 474
 475                 // Parse the header for meta info
 476                 dv_parse_header( dv_decoder, data );
 477                 //mlt_properties_set_int( properties, "progressive", dv_is_progressive( dv_decoder ) );
 478                 mlt_properties_set_double( properties, "aspect_ratio",
 479                                 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 ) );
 480
 481
 482                 mlt_properties_set_int( properties, "frequency", dv_decoder->audio->frequency );
 483                 mlt_properties_set_int( properties, "channels", dv_decoder->audio->num_channels );
 484
 485                 // Hmm - register audio callback
 486                 mlt_frame_push_audio( *frame, producer_get_audio );
 487
 488                 // Push the quality string
 489                 mlt_frame_push_service( *frame, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "quality" ) );
 490
 491                 // Push the get_image method on to the stack
 492                 mlt_frame_push_get_image( *frame, producer_get_image );
 493
 494                 // Return the decoder
 495                 dv_decoder_return( dv_decoder );
 496         }
 497
 498         // Update timecode on the frame we're creating
 499         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 500
 501         // Calculate the next timecode
 502         mlt_producer_prepare_next( producer );
 503
 504         return 0;
 505 }
 506
 507 static void producer_close( mlt_producer parent )
 508 {
 509         // Obtain this
 510         producer_libdv this = parent->child;
 511
 512         // Close the file
 513         if ( this->fd > 0 )
 514                 close( this->fd );
 515
 516         if ( this->alternative )
 517                 mlt_producer_close( this->alternative );
 518
 519         // Close the parent
 520         parent->close = NULL;
 521         mlt_producer_close( parent );
 522
 523         // Free the memory
 524         free( this );
 525 }