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 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.
  10  *
  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.
  15  *
  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.
  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 };
 127
 128 static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
 129 static void producer_close( mlt_producer parent );
 130
 131 static int producer_collect_info( producer_libdv this );
 132
 133 mlt_producer producer_libdv_init( char *filename )
 134 {
 135         producer_libdv this = calloc( sizeof( struct producer_libdv_s ), 1 );
 136
 137         if ( filename != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
 138         {
 139                 mlt_producer producer = &this->parent;
 140                 mlt_properties properties = MLT_PRODUCER_PROPERTIES( producer );
 141
 142                 // Register transport implementation with the producer
 143                 producer->close = ( mlt_destructor )producer_close;
 144
 145                 // Register our get_frame implementation with the producer
 146                 producer->get_frame = producer_get_frame;
 147
 148                 // Open the file if specified
 149                 this->fd = open( filename, O_RDONLY );
 150
 151                 // Collect info
 152                 if ( this->fd != -1 && producer_collect_info( this ) )
 153                 {
 154                         // Set the resource property (required for all producers)
 155                         mlt_properties_set( properties, "resource", filename );
 156                 }
 157                 else
 158                 {
 159                         // Reject this file
 160                         mlt_producer_close( producer );
 161                         producer = NULL;
 162                 }
 163
 164                 // Return the producer
 165                 return producer;
 166         }
 167         free( this );
 168         return NULL;
 169 }
 170
 171 static int read_frame( int fd, uint8_t* frame_buf, int *isPAL )
 172 {
 173         int result = read( fd, frame_buf, FRAME_SIZE_525_60 ) == FRAME_SIZE_525_60;
 174         if ( result )
 175         {
 176                 *isPAL = ( frame_buf[3] & 0x80 );
 177
 178                 if ( *isPAL )
 179                 {
 180                         int diff = FRAME_SIZE_625_50 - FRAME_SIZE_525_60;
 181                         result = read( fd, frame_buf + FRAME_SIZE_525_60, diff ) == diff;
 182                 }
 183         }
 184
 185         return result;
 186 }
 187
 188 static int producer_collect_info( producer_libdv this )
 189 {
 190         int valid = 0;
 191
 192         uint8_t *dv_data = mlt_pool_alloc( FRAME_SIZE_625_50 );
 193
 194         if ( dv_data != NULL )
 195         {
 196                 // Read the first frame
 197                 valid = read_frame( this->fd, dv_data, &this->is_pal );
 198
 199                 // If it looks like a valid frame, the get stats
 200                 if ( valid )
 201                 {
 202                         // Get the properties
 203                         mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
 204
 205                         // Get a dv_decoder
 206                         dv_decoder_t *dv_decoder = dv_decoder_alloc( );
 207
 208                         // Determine the file size
 209                         struct stat buf;
 210                         fstat( this->fd, &buf );
 211
 212                         // Store the file size
 213                         this->file_size = buf.st_size;
 214
 215                         // Determine the frame size
 216                         this->frame_size = this->is_pal ? FRAME_SIZE_625_50 : FRAME_SIZE_525_60;
 217
 218                         // Determine the number of frames in the file
 219                         this->frames_in_file = this->file_size / this->frame_size;
 220
 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 )
 224                         {
 225                                 if ( this->frames_in_file > 0 )
 226                                 {
 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 );
 230                                 }
 231                         }
 232                         else
 233                         {
 234                                 valid = 0;
 235                         }
 236
 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 ) );
 241
 242                         // Return the decoder
 243                         dv_decoder_return( dv_decoder );
 244                 }
 245
 246                 mlt_pool_release( dv_data );
 247         }
 248
 249         return valid;
 250 }
 251
 252 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 253 {
 254         int pitches[3] = { 0, 0, 0 };
 255         uint8_t *pixels[3] = { NULL, NULL, NULL };
 256
 257         // Get the frames properties
 258         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 259
 260         // Get a dv_decoder
 261         dv_decoder_t *decoder = dv_decoder_alloc( );
 262
 263         // Get the dv data
 264         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
 265
 266         // Get and set the quality request
 267         char *quality = mlt_frame_pop_service( this );
 268
 269         if ( quality != NULL )
 270         {
 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 );
 275                 else
 276                         decoder->quality = ( DV_QUALITY_COLOR | DV_QUALITY_AC_1 );
 277         }
 278
 279         // Parse the header for meta info
 280         dv_parse_header( decoder, dv_data );
 281
 282         // Assign width and height from properties
 283         *width = mlt_properties_get_int( properties, "width" );
 284         *height = mlt_properties_get_int( properties, "height" );
 285
 286         // Extract an image of the format requested
 287         if ( *format == mlt_image_yuv422 )
 288         {
 289                 // Allocate an image
 290                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 2 );
 291
 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 );
 294
 295                 // Decode the image
 296                 pitches[ 0 ] = *width * 2;
 297                 pixels[ 0 ] = image;
 298                 dv_decode_full_frame( decoder, dv_data, e_dv_color_yuv, pixels, pitches );
 299
 300                 // Assign result
 301                 *buffer = image;
 302         }
 303         else if ( *format == mlt_image_rgb24 )
 304         {
 305                 // Allocate an image
 306                 uint8_t *image = mlt_pool_alloc( *width * ( *height + 1 ) * 3 );
 307
 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 );
 310
 311                 // Decode the frame
 312                 pitches[ 0 ] = 720 * 3;
 313                 pixels[ 0 ] = image;
 314                 dv_decode_full_frame( decoder, dv_data, e_dv_color_rgb, pixels, pitches );
 315
 316                 // Assign result
 317                 *buffer = image;
 318         }
 319
 320         // Return the decoder
 321         dv_decoder_return( decoder );
 322
 323         return 0;
 324 }
 325
 326 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 327 {
 328         int16_t *p;
 329         int i, j;
 330         int16_t *audio_channels[ 4 ];
 331
 332         // Get the frames properties
 333         mlt_properties properties = MLT_FRAME_PROPERTIES( this );
 334
 335         // Get a dv_decoder
 336         dv_decoder_t *decoder = dv_decoder_alloc( );
 337
 338         // Get the dv data
 339         uint8_t *dv_data = mlt_properties_get_data( properties, "dv_data", NULL );
 340
 341         // Parse the header for meta info
 342         dv_parse_header( decoder, dv_data );
 343
 344         // Check that we have audio
 345         if ( decoder->audio->num_channels > 0 )
 346         {
 347                 // Obtain required values
 348                 *frequency = decoder->audio->frequency;
 349                 *samples = decoder->audio->samples_this_frame;
 350                 *channels = decoder->audio->num_channels;
 351
 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 ) );
 355
 356                 // Create a workspace for the result
 357                 *buffer = mlt_pool_alloc( *channels * DV_AUDIO_MAX_SAMPLES * sizeof( int16_t ) );
 358
 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 );
 361
 362                 // Decode the audio
 363                 dv_decode_full_audio( decoder, dv_data, audio_channels );
 364
 365                 // Interleave the audio
 366                 p = *buffer;
 367                 for ( i = 0; i < *samples; i++ )
 368                         for ( j = 0; j < *channels; j++ )
 369                                 *p++ = audio_channels[ j ][ i ];
 370
 371                 // Free the temporary work space
 372                 for ( i = 0; i < 4; i++ )
 373                         mlt_pool_release( audio_channels[ i ] );
 374         }
 375         else
 376         {
 377                 // No audio available on the frame, so get test audio (silence)
 378                 mlt_frame_get_audio( this, buffer, format, frequency, channels, samples );
 379         }
 380
 381         // Return the decoder
 382         dv_decoder_return( decoder );
 383
 384         return 0;
 385 }
 386
 387 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 388 {
 389         producer_libdv this = producer->child;
 390         uint8_t *data = mlt_pool_alloc( FRAME_SIZE_625_50 );
 391
 392         // Obtain the current frame number
 393         uint64_t position = mlt_producer_frame( producer );
 394
 395         // Convert timecode to a file position (ensuring that we're on a frame boundary)
 396         uint64_t offset = position * this->frame_size;
 397
 398         // Create an empty frame
 399         *frame = mlt_frame_init( );
 400
 401         // Seek and fetch
 402         if ( this->fd != 0 &&
 403                  lseek( this->fd, offset, SEEK_SET ) == offset &&
 404                  read_frame( this->fd, data, &this->is_pal ) )
 405         {
 406                 // Get the frames properties
 407                 mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
 408
 409                 // Get a dv_decoder
 410                 dv_decoder_t *dv_decoder = dv_decoder_alloc( );
 411
 412                 // Pass the dv data
 413                 mlt_properties_set_data( properties, "dv_data", data, FRAME_SIZE_625_50, ( mlt_destructor )mlt_pool_release, NULL );
 414
 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 );
 419
 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 ) );
 425
 426                 // Hmm - register audio callback
 427                 mlt_frame_push_audio( *frame, producer_get_audio );
 428
 429                 // Push the quality string
 430                 mlt_frame_push_service( *frame, mlt_properties_get( MLT_PRODUCER_PROPERTIES( producer ), "quality" ) );
 431
 432                 // Push the get_image method on to the stack
 433                 mlt_frame_push_get_image( *frame, producer_get_image );
 434
 435                 // Return the decoder
 436                 dv_decoder_return( dv_decoder );
 437         }
 438         else
 439         {
 440                 mlt_pool_release( data );
 441         }
 442
 443         // Update timecode on the frame we're creating
 444         mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
 445
 446         // Calculate the next timecode
 447         mlt_producer_prepare_next( producer );
 448
 449         return 0;
 450 }
 451
 452 static void producer_close( mlt_producer parent )
 453 {
 454         // Obtain this
 455         producer_libdv this = parent->child;
 456
 457         // Close the file
 458         if ( this->fd > 0 )
 459                 close( this->fd );
 460
 461         // Close the parent
 462         parent->close = NULL;
 463         mlt_producer_close( parent );
 464
 465         // Free the memory
 466         free( this );
 467 }