research.m1stereo.tv/gitweb/ - melted/blob - mlt/src/modules/ffmpeg/producer_ffmpeg.c

   1 /*
   2  * producer_ffmpeg.c -- simple ffmpeg 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_ffmpeg.h"
  22
  23 #include <framework/mlt_frame.h>
  24 #include <framework/mlt_factory.h>
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 typedef struct producer_ffmpeg_s *producer_ffmpeg;
  31
  32 struct producer_ffmpeg_s
  33 {
  34         struct mlt_producer_s parent;
  35         FILE *video;
  36         FILE *audio;
  37         uint64_t expected;
  38         uint8_t *buffer;
  39         int open;
  40         int width;
  41         int height;
  42         int end_of_video;
  43         int end_of_audio;
  44 };
  45
  46 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
  47 static void producer_close( mlt_producer parent );
  48
  49 /** Consutruct an ffmpeg producer.
  50 */
  51
  52 mlt_producer producer_ffmpeg_init( char *file )
  53 {
  54         producer_ffmpeg this = calloc( sizeof( struct producer_ffmpeg_s ), 1 );
  55         if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
  56         {
  57                 // Get the producer
  58                 mlt_producer producer = &this->parent;
  59
  60                 // Get the properties of the producer
  61                 mlt_properties properties = mlt_producer_properties( producer );
  62
  63                 // Override get_frame and close methods
  64                 producer->get_frame = producer_get_frame;
  65                 producer->close = producer_close;
  66
  67                 // Set the properties
  68                 mlt_properties_set( properties, "mlt_type", "producer_ffmpeg" );
  69
  70                 if ( file != NULL && !strcmp( file, "v4l" ) )
  71                 {
  72                         mlt_properties_set( properties, "video_type", "v4l" );
  73                         mlt_properties_set( properties, "video_file", "/dev/video0" );
  74                         mlt_properties_set( properties, "video_size", "640x480" );
  75                         mlt_properties_set( properties, "audio_type", "dsp" );
  76                         mlt_properties_set( properties, "audio_file", "/dev/dsp" );
  77                 }
  78                 else
  79                 {
  80                         mlt_properties_set( properties, "video_type", "file" );
  81                         mlt_properties_set( properties, "video_file", file );
  82                         mlt_properties_set( properties, "video_size", "" );
  83                         mlt_properties_set( properties, "audio_type", "file" );
  84                         mlt_properties_set( properties, "audio_file", file );
  85                 }
  86
  87                 mlt_properties_set_int( properties, "audio_rate", 48000 );
  88                 mlt_properties_set_int( properties, "audio_channels", 2 );
  89                 mlt_properties_set_int( properties, "audio_track", 0 );
  90
  91                 this->buffer = malloc( 1024 * 1024 * 2 );
  92
  93                 return producer;
  94         }
  95         free( this );
  96         return NULL;
  97 }
  98
  99 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 100 {
 101         // Get the frames properties
 102         mlt_properties properties = mlt_frame_properties( this );
 103
 104         if ( mlt_properties_get_int( properties, "has_image" ) )
 105         {
 106                 // Get width and height
 107                 *format = mlt_image_yuv422;
 108                 *width = mlt_properties_get_int( properties, "width" );
 109                 *height = mlt_properties_get_int( properties, "height" );
 110
 111                 // Specify format and image
 112                 *buffer = mlt_properties_get_data( properties, "image", NULL );
 113         }
 114         else
 115         {
 116                 mlt_frame_get_image( this, buffer, format, width, height, writable );
 117         }
 118
 119         return 0;
 120 }
 121
 122 FILE *producer_ffmpeg_run_video( producer_ffmpeg this )
 123 {
 124         if ( this->video == NULL )
 125         {
 126                 // Get the producer
 127                 mlt_producer producer = &this->parent;
 128
 129                 // Get the properties of the producer
 130                 mlt_properties properties = mlt_producer_properties( producer );
 131
 132                 // Get the video loop property
 133                 int video_loop = mlt_properties_get_int( properties, "video_loop" );
 134
 135                 if ( !this->open || video_loop )
 136                 {
 137                         const char *mlt_prefix = mlt_factory_prefix( );
 138                         char *video_type = mlt_properties_get( properties, "video_type" );
 139                         char *video_file = mlt_properties_get( properties, "video_file" );
 140                         float video_rate = mlt_properties_get_double( properties, "fps" );
 141                         char *video_size = mlt_properties_get( properties, "video_size" );
 142                         char command[ 1024 ] = "";
 143                         float position = mlt_producer_position( &this->parent );
 144
 145                         if ( video_loop || position < 0 ) position = 0;
 146
 147                         sprintf( command, "%s/ffmpeg/video.sh \"%s\" \"%s\" \"%s\" %f %f 2>/dev/null",
 148                                                           mlt_prefix,
 149                                                           video_type,
 150                                                           video_file,
 151                                                           video_size,
 152                                                           video_rate,
 153                                                           position );
 154
 155                         this->video = popen( command, "r" );
 156                 }
 157         }
 158         return this->video;
 159 }
 160
 161 FILE *producer_ffmpeg_run_audio( producer_ffmpeg this )
 162 {
 163         // Get the producer
 164         mlt_producer producer = &this->parent;
 165
 166         // Get the properties of the producer
 167         mlt_properties properties = mlt_producer_properties( producer );
 168
 169         if ( this->audio == NULL )
 170         {
 171                 int audio_loop = mlt_properties_get_int( properties, "audio_loop" );
 172
 173                 if ( !this->open || audio_loop )
 174                 {
 175                         const char *mlt_prefix = mlt_factory_prefix( );
 176                         char *audio_type = mlt_properties_get( properties, "audio_type" );
 177                         char *audio_file = mlt_properties_get( properties, "audio_file" );
 178                         int frequency = mlt_properties_get_int( properties, "audio_rate" );
 179                         int channels = mlt_properties_get_int( properties, "audio_channels" );
 180                         int track = mlt_properties_get_int( properties, "audio_track" );
 181                         char command[ 1024 ] = "";
 182                         float position = mlt_producer_position( &this->parent );
 183
 184                         if ( audio_loop || position < 0 ) position = 0;
 185
 186                         sprintf( command, "%s/ffmpeg/audio.sh \"%s\" \"%s\" %f %d %d %d 2>/dev/null",
 187                                                           mlt_prefix,
 188                                                           audio_type,
 189                                                           audio_file,
 190                                                           position,
 191                                                           frequency,
 192                                                           channels,
 193                                                           track );
 194
 195                         this->audio = popen( command, "r" );
 196                 }
 197         }
 198         return this->audio;
 199 }
 200
 201 static void producer_ffmpeg_position( producer_ffmpeg this, uint64_t requested, int *skip )
 202 {
 203         *skip = 0;
 204
 205         if ( this->open && requested > this->expected )
 206         {
 207                 // Skip the following n frames
 208                 *skip = requested - this->expected;
 209         }
 210         else if ( requested != this->expected )
 211         {
 212                 // Close the video pipe
 213                 if ( this->video != NULL )
 214                         pclose( this->video );
 215                 this->video = NULL;
 216
 217                 // Close the audio pipe
 218                 if ( this->audio != NULL )
 219                         pclose( this->audio );
 220                 this->audio = NULL;
 221
 222                 // We should not be open now
 223                 this->open = 0;
 224                 this->end_of_video = 0;
 225                 this->end_of_audio = 0;
 226         }
 227
 228         // This is the next frame we expect
 229         this->expected = mlt_producer_frame( &this->parent ) + 1;
 230
 231         // Open the pipe
 232         this->video = producer_ffmpeg_run_video( this );
 233
 234         // Open the audio pipe
 235         this->audio = producer_ffmpeg_run_audio( this );
 236
 237         // We should be open now
 238         this->open = 1;
 239 }
 240
 241 static int sample_calculator( float fps, int frequency, int64_t position )
 242 {
 243         int samples = 0;
 244
 245         if ( fps > 29 && fps <= 30 )
 246         {
 247                 samples = frequency / 30;
 248
 249                 switch ( frequency )
 250                 {
 251                         case 48000:
 252                                 if ( position % 5 != 0 )
 253                                         samples += 2;
 254                                 break;
 255                         case 44100:
 256                                 if ( position % 300 == 0 )
 257                                         samples = 1471;
 258                                 else if ( position % 30 == 0 )
 259                                         samples = 1470;
 260                                 else if ( position % 2 == 0 )
 261                                         samples = 1472;
 262                                 else
 263                                         samples = 1471;
 264                                 break;
 265                         case 32000:
 266                                 if ( position % 30 == 0 )
 267                                         samples = 1068;
 268                                 else if ( position % 29 == 0 )
 269                                         samples = 1067;
 270                                 else if ( position % 4 == 2 )
 271                                         samples = 1067;
 272                                 else
 273                                         samples = 1068;
 274                                 break;
 275                         default:
 276                                 samples = 0;
 277                 }
 278         }
 279         else if ( fps != 0 )
 280         {
 281                 samples = frequency / fps;
 282         }
 283
 284         return samples;
 285 }
 286
 287 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 288 {
 289         // Get the frames properties
 290         mlt_properties properties = mlt_frame_properties( this );
 291
 292         producer_ffmpeg producer = mlt_properties_get_data( properties, "producer_ffmpeg", NULL );
 293         mlt_properties producer_properties = mlt_producer_properties( &producer->parent );
 294
 295         int64_t target = mlt_properties_get_double( properties, "target" );
 296         int skip = mlt_properties_get_int( properties, "skip" );
 297
 298         float fps = mlt_properties_get_double( producer_properties, "fps" );
 299         *frequency = mlt_properties_get_int( producer_properties, "audio_rate" );
 300         *channels = mlt_properties_get_int( producer_properties, "audio_channels" );
 301
 302         // Maximum Size (?)
 303         int size = ( *frequency / 25 ) * *channels * 2;
 304
 305         // Allocate an image
 306         *buffer = malloc( size );
 307
 308         // Read it
 309         if ( producer->audio != NULL )
 310         {
 311                 do
 312                 {
 313                         *samples = sample_calculator( fps, *frequency, target - skip );
 314                         if ( fread( *buffer, *samples * *channels * 2, 1, producer->audio ) != 1 )
 315                         {
 316                                 pclose( producer->audio );
 317                                 producer->audio = NULL;
 318                                 producer->end_of_audio = 1;
 319                         }
 320                 }
 321                 while( producer->audio != NULL && skip -- );
 322         }
 323         else
 324         {
 325                 *samples = sample_calculator( fps, *frequency, target );
 326                 memset( *buffer, 0, size );
 327         }
 328
 329         // Pass the data on the frame properties
 330         mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
 331
 332         // Set the producer properties
 333         mlt_properties_set_int( producer_properties, "end_of_clip", producer->end_of_video && producer->end_of_audio );
 334
 335         return 0;
 336 }
 337
 338 static int read_ffmpeg_header( producer_ffmpeg this, int *width, int *height )
 339 {
 340         int count = 0;
 341         char temp[ 132 ];
 342         FILE *video = this->video;
 343
 344         if ( fgets( temp, 132, video ) )
 345         {
 346                 if ( strncmp( temp, "FRAME", 5 ) )
 347                 {
 348                         if ( strstr( temp, " W" ) != NULL )
 349                                 *width = atoi( strstr( temp, " W" ) + 2 );
 350                         if ( strstr( temp, " H" ) != NULL )
 351                                 *height = atoi( strstr( temp, " H" ) + 2 );
 352                         count = 2;
 353                         fgets( temp, 132, video );
 354                         this->width = *width;
 355                         this->height = *height;
 356                 }
 357                 else
 358                 {
 359                         *width = this->width;
 360                         *height = this->height;
 361                         count = 2;
 362                 }
 363         }
 364         return count;
 365 }
 366
 367 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 368 {
 369         producer_ffmpeg this = producer->child;
 370         int width;
 371         int height;
 372         int skip;
 373
 374         // Construct a test frame
 375         *frame = mlt_frame_init( );
 376
 377         // Are we at the position expected?
 378         producer_ffmpeg_position( this, mlt_producer_frame( producer ), &skip );
 379
 380         // Get properties objects
 381         mlt_properties producer_properties = mlt_producer_properties( &this->parent );
 382
 383         // Get the frames properties
 384         mlt_properties properties = mlt_frame_properties( *frame );
 385
 386         FILE *video = this->video;
 387
 388         mlt_properties_set_double( properties, "target", mlt_producer_frame( producer ) );
 389         mlt_properties_set_int( properties, "skip", skip );
 390
 391         // Read the video
 392         if ( video != NULL && read_ffmpeg_header( this, &width, &height ) == 2 )
 393         {
 394                 // Allocate an image
 395                 uint8_t *image = malloc( width * height * 2 );
 396
 397                 // Read it
 398                 while( skip -- )
 399                 {
 400                         if ( fread( this->buffer, width * height * 3 / 2, 1, video ) == 1 )
 401                                 read_ffmpeg_header( this, &width, &height );
 402                         else
 403                                 skip = 0;
 404                 }
 405
 406                 fread( this->buffer, width * height * 3 / 2, 1, video );
 407
 408                 // Convert it
 409                 mlt_convert_yuv420p_to_yuv422( this->buffer, width, height, width, image );
 410
 411                 // Pass the data on the frame properties
 412                 mlt_properties_set_data( properties, "image", image, width * height * 2, free, NULL );
 413                 mlt_properties_set_int( properties, "width", width );
 414                 mlt_properties_set_int( properties, "height", height );
 415                 mlt_properties_set_int( properties, "has_image", 1 );
 416
 417                 // Push the image callback
 418                 mlt_frame_push_get_image( *frame, producer_get_image );
 419
 420         }
 421         else
 422         {
 423                 // Clean up
 424                 if ( this->video != NULL )
 425                 {
 426                         int video_loop = mlt_properties_get_int( producer_properties, "video_loop" );
 427
 428                         // Inform caller that end of clip is reached
 429                         this->end_of_video = !video_loop;
 430                         pclose( this->video );
 431                         this->video = NULL;
 432                 }
 433
 434                 // Push the image callback
 435                 mlt_frame_push_get_image( *frame, producer_get_image );
 436         }
 437
 438         // Set the audio pipe
 439         mlt_properties_set_data( properties, "producer_ffmpeg", this, 0, NULL, NULL );
 440         mlt_properties_set_int( properties, "end_of_clip", this->end_of_video && this->end_of_audio );
 441
 442         // Hmm - register audio callback
 443         ( *frame )->get_audio = producer_get_audio;
 444
 445         // Get the additional properties
 446         double aspect_ratio = mlt_properties_get_double( producer_properties, "aspect_ratio" );
 447         double speed = mlt_properties_get_double( producer_properties, "speed" );
 448
 449         // Set them on the frame
 450         mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
 451         mlt_properties_set_double( properties, "speed", speed );
 452
 453         // Set the out point on the producer
 454         if ( this->end_of_video && this->end_of_audio )
 455                 mlt_producer_set_in_and_out( &this->parent, mlt_producer_get_in( &this->parent ), mlt_producer_position( &this->parent ) );
 456
 457         // Update timecode on the frame we're creating
 458         mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
 459
 460         // Calculate the next timecode
 461         mlt_producer_prepare_next( producer );
 462
 463         return 0;
 464 }
 465
 466 static void producer_close( mlt_producer parent )
 467 {
 468         producer_ffmpeg this = parent->child;
 469         if ( this->video )
 470                 pclose( this->video );
 471         if ( this->audio )
 472                 pclose( this->audio );
 473         parent->close = NULL;
 474         mlt_producer_close( parent );
 475         free( this->buffer );
 476         free( this );
 477 }
 478