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 #include <ctype.h>
  30 #include <sys/types.h>
  31 #include <sys/wait.h>
  32 #include <unistd.h>
  33
  34 typedef struct producer_ffmpeg_s *producer_ffmpeg;
  35
  36 /** Bi-directional pipe structure.
  37 */
  38
  39 typedef struct rwpipe
  40 {
  41     int pid;
  42     FILE *reader;
  43     FILE *writer;
  44 }
  45 rwpipe;
  46
  47 /** Create a bidirectional pipe for the given command.
  48 */
  49
  50 rwpipe *rwpipe_open( char *command )
  51 {
  52     rwpipe *this = malloc( sizeof( rwpipe ) );
  53
  54     if ( this != NULL )
  55     {
  56         int input[ 2 ];
  57         int output[ 2 ];
  58
  59         pipe( input );
  60         pipe( output );
  61
  62         this->pid = fork();
  63
  64         if ( this->pid == 0 )
  65         {
  66                         signal( SIGPIPE, SIG_DFL );
  67                         signal( SIGHUP, SIG_DFL );
  68                         signal( SIGINT, SIG_DFL );
  69                         signal( SIGTERM, SIG_DFL );
  70                         signal( SIGSTOP, SIG_DFL );
  71                         signal( SIGCHLD, SIG_DFL );
  72
  73             dup2( output[ 0 ], STDIN_FILENO );
  74             dup2( input[ 1 ], STDOUT_FILENO );
  75
  76             close( input[ 0 ] );
  77             close( input[ 1 ] );
  78             close( output[ 0 ] );
  79             close( output[ 1 ] );
  80
  81                         execl( "/bin/sh", "sh", "-c", command, NULL );
  82             exit( 255 );
  83         }
  84         else
  85         {
  86                         setpgid( this->pid, this->pid );
  87
  88             close( input[ 1 ] );
  89             close( output[ 0 ] );
  90
  91             this->reader = fdopen( input[ 0 ], "r" );
  92             this->writer = fdopen( output[ 1 ], "w" );
  93         }
  94     }
  95
  96     return this;
  97 }
  98
  99 /** Read data from the pipe.
 100 */
 101
 102 FILE *rwpipe_reader( rwpipe *this )
 103 {
 104     if ( this != NULL )
 105         return this->reader;
 106     else
 107         return NULL;
 108 }
 109
 110 /** Write data to the pipe.
 111 */
 112
 113 FILE *rwpipe_writer( rwpipe *this )
 114 {
 115     if ( this != NULL )
 116         return this->writer;
 117     else
 118         return NULL;
 119 }
 120
 121 /** Close the pipe and process.
 122 */
 123
 124 void rwpipe_close( rwpipe *this )
 125 {
 126     if ( this != NULL )
 127     {
 128                 fclose( this->reader );
 129                 fclose( this->writer );
 130                 kill( - this->pid, SIGKILL );
 131         waitpid( - this->pid, NULL, 0 );
 132         free( this );
 133     }
 134 }
 135
 136 struct producer_ffmpeg_s
 137 {
 138         struct mlt_producer_s parent;
 139         rwpipe *video_pipe;
 140         rwpipe *audio_pipe;
 141         FILE *video;
 142         FILE *audio;
 143         uint64_t expected;
 144         uint8_t *buffer;
 145         int open;
 146         int width;
 147         int height;
 148         int end_of_video;
 149         int end_of_audio;
 150 };
 151
 152 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index );
 153 static void producer_close( mlt_producer parent );
 154
 155 /** Consutruct an ffmpeg producer.
 156 */
 157
 158 mlt_producer producer_ffmpeg_init( char *file )
 159 {
 160         producer_ffmpeg this = calloc( sizeof( struct producer_ffmpeg_s ), 1 );
 161         if ( file != NULL && this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
 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                 // Override get_frame and close methods
 170                 producer->get_frame = producer_get_frame;
 171                 producer->close = producer_close;
 172
 173                 // Set the properties
 174                 mlt_properties_set( properties, "mlt_type", "producer_ffmpeg" );
 175
 176                 if ( !strcmp( file, "v4l" ) )
 177                 {
 178                         mlt_properties_set( properties, "video_type", "v4l" );
 179                         mlt_properties_set( properties, "video_file", "/dev/video0" );
 180                         mlt_properties_set( properties, "video_size", "640x480" );
 181                         mlt_properties_set( properties, "audio_type", "dsp" );
 182                         mlt_properties_set( properties, "audio_file", "/dev/dsp" );
 183                 }
 184                 else
 185                 {
 186                         mlt_properties_set( properties, "video_type", "file" );
 187                         mlt_properties_set( properties, "video_file", file );
 188                         mlt_properties_set( properties, "video_size", "" );
 189                         mlt_properties_set( properties, "audio_type", "file" );
 190                         mlt_properties_set( properties, "audio_file", file );
 191                 }
 192
 193                 mlt_properties_set_int( properties, "audio_rate", 48000 );
 194                 mlt_properties_set_int( properties, "audio_channels", 2 );
 195                 mlt_properties_set_int( properties, "audio_track", 0 );
 196
 197                 mlt_properties_set( properties, "log_id", file );
 198                 mlt_properties_set( properties, "resource", file );
 199
 200                 this->buffer = malloc( 1024 * 1024 * 2 );
 201
 202                 return producer;
 203         }
 204         free( this );
 205         return NULL;
 206 }
 207
 208 static int producer_get_image( mlt_frame this, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
 209 {
 210         // Get the frames properties
 211         mlt_properties properties = mlt_frame_properties( this );
 212
 213         if ( mlt_properties_get_int( properties, "has_image" ) )
 214         {
 215                 // Get width and height
 216                 *format = mlt_image_yuv422;
 217                 *width = mlt_properties_get_int( properties, "width" );
 218                 *height = mlt_properties_get_int( properties, "height" );
 219
 220                 // Specify format and image
 221                 *buffer = mlt_properties_get_data( properties, "image", NULL );
 222         }
 223         else
 224         {
 225                 mlt_frame_get_image( this, buffer, format, width, height, writable );
 226         }
 227
 228         return 0;
 229 }
 230
 231 FILE *producer_ffmpeg_run_video( producer_ffmpeg this, mlt_timecode position )
 232 {
 233         if ( this->video == NULL )
 234         {
 235                 // Get the producer
 236                 mlt_producer producer = &this->parent;
 237
 238                 // Get the properties of the producer
 239                 mlt_properties properties = mlt_producer_properties( producer );
 240
 241                 // Get the video loop property
 242                 int video_loop = mlt_properties_get_int( properties, "video_loop" );
 243
 244                 if ( !this->open || video_loop )
 245                 {
 246                         const char *mlt_prefix = mlt_factory_prefix( );
 247                         char *video_type = mlt_properties_get( properties, "video_type" );
 248                         char *video_file = mlt_properties_get( properties, "video_file" );
 249                         float video_rate = mlt_properties_get_double( properties, "fps" );
 250                         char *video_size = mlt_properties_get( properties, "video_size" );
 251                         char command[ 1024 ] = "";
 252
 253                         sprintf( command, "%s/ffmpeg/video.sh \"%s\" \"%s\" \"%s\" %f %f 2>/dev/null",
 254                                                           mlt_prefix,
 255                                                           video_type,
 256                                                           video_file,
 257                                                           video_size,
 258                                                           video_rate,
 259                                                           ( float )position );
 260
 261                         this->video_pipe = rwpipe_open( command );
 262                         this->video = rwpipe_reader( this->video_pipe );
 263                 }
 264         }
 265         return this->video;
 266 }
 267
 268 FILE *producer_ffmpeg_run_audio( producer_ffmpeg this, mlt_timecode position )
 269 {
 270         // Get the producer
 271         mlt_producer producer = &this->parent;
 272
 273         // Get the properties of the producer
 274         mlt_properties properties = mlt_producer_properties( producer );
 275
 276         if ( this->audio == NULL )
 277         {
 278                 int audio_loop = mlt_properties_get_int( properties, "audio_loop" );
 279
 280                 if ( !this->open || audio_loop )
 281                 {
 282                         const char *mlt_prefix = mlt_factory_prefix( );
 283                         char *audio_type = mlt_properties_get( properties, "audio_type" );
 284                         char *audio_file = mlt_properties_get( properties, "audio_file" );
 285                         int frequency = mlt_properties_get_int( properties, "audio_rate" );
 286                         int channels = mlt_properties_get_int( properties, "audio_channels" );
 287                         int track = mlt_properties_get_int( properties, "audio_track" );
 288                         char command[ 1024 ] = "";
 289
 290                         sprintf( command, "%s/ffmpeg/audio.sh \"%s\" \"%s\" %f %d %d %d 2>/dev/null",
 291                                                           mlt_prefix,
 292                                                           audio_type,
 293                                                           audio_file,
 294                                                           ( float )position,
 295                                                           frequency,
 296                                                           channels,
 297                                                           track );
 298
 299                         this->audio_pipe = rwpipe_open( command );
 300                         this->audio = rwpipe_reader( this->audio_pipe );
 301                 }
 302         }
 303         return this->audio;
 304 }
 305
 306 static void producer_ffmpeg_position( producer_ffmpeg this, uint64_t requested, int *skip )
 307 {
 308         *skip = 0;
 309
 310         if ( this->open && requested > this->expected )
 311         {
 312                 // Skip the following n frames
 313                 *skip = requested - this->expected;
 314         }
 315         else if ( requested != this->expected )
 316         {
 317                 // Close the video pipe
 318                 if ( this->video != NULL )
 319                         rwpipe_close( this->video_pipe );
 320                 this->video = NULL;
 321
 322                 // Close the audio pipe
 323                 if ( this->audio != NULL )
 324                         rwpipe_close( this->audio_pipe );
 325                 this->audio = NULL;
 326
 327                 // We should not be open now
 328                 this->open = 0;
 329                 this->end_of_video = 0;
 330                 this->end_of_audio = 0;
 331         }
 332
 333         // This is the next frame we expect
 334         this->expected = requested + 1;
 335
 336         // Open the pipe
 337         this->video = producer_ffmpeg_run_video( this, 0 );
 338
 339         // Open the audio pipe
 340         this->audio = producer_ffmpeg_run_audio( this, 0 );
 341
 342         // We should be open now
 343         this->open = 1;
 344 }
 345
 346 static int producer_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples )
 347 {
 348         // Get the frames properties
 349         mlt_properties properties = mlt_frame_properties( this );
 350
 351         producer_ffmpeg producer = mlt_properties_get_data( properties, "producer_ffmpeg", NULL );
 352         mlt_properties producer_properties = mlt_producer_properties( &producer->parent );
 353
 354         int64_t target = mlt_properties_get_double( properties, "target" );
 355         int skip = mlt_properties_get_int( properties, "skip" );
 356
 357         float fps = mlt_properties_get_double( producer_properties, "fps" );
 358         *frequency = mlt_properties_get_int( producer_properties, "audio_rate" );
 359         *channels = mlt_properties_get_int( producer_properties, "audio_channels" );
 360
 361         // Maximum Size (?)
 362         int size = ( *frequency / 25 ) * *channels * 2;
 363
 364         // Allocate an image
 365         *buffer = malloc( size );
 366
 367         // Read it
 368         if ( producer->audio != NULL )
 369         {
 370                 do
 371                 {
 372                         *samples = mlt_sample_calculator( fps, *frequency, target - skip );
 373                         if ( fread( *buffer, *samples * *channels * 2, 1, producer->audio ) != 1 )
 374                         {
 375                                 rwpipe_close( producer->audio_pipe );
 376                                 producer->audio = NULL;
 377                                 producer->end_of_audio = 1;
 378                         }
 379                 }
 380                 while( producer->audio != NULL && skip -- );
 381         }
 382         else
 383         {
 384                 *samples = mlt_sample_calculator( fps, *frequency, target );
 385                 memset( *buffer, 0, size );
 386         }
 387
 388         // Pass the data on the frame properties
 389         mlt_properties_set_data( properties, "audio", *buffer, size, free, NULL );
 390
 391         // Set the producer properties
 392         mlt_properties_set_int( producer_properties, "end_of_clip", producer->end_of_video && producer->end_of_audio );
 393
 394         return 0;
 395 }
 396
 397 static int read_ffmpeg_header( producer_ffmpeg this, int *width, int *height )
 398 {
 399         int count = 0;
 400         char temp[ 132 ];
 401         FILE *video = this->video;
 402
 403         if ( fgets( temp, 132, video ) )
 404         {
 405                 if ( strncmp( temp, "FRAME", 5 ) )
 406                 {
 407                         if ( strstr( temp, " W" ) != NULL )
 408                                 *width = atoi( strstr( temp, " W" ) + 2 );
 409                         if ( strstr( temp, " H" ) != NULL )
 410                                 *height = atoi( strstr( temp, " H" ) + 2 );
 411                         count = 2;
 412                         fgets( temp, 132, video );
 413                         this->width = *width;
 414                         this->height = *height;
 415                 }
 416                 else
 417                 {
 418                         *width = this->width;
 419                         *height = this->height;
 420                         count = 2;
 421                 }
 422         }
 423         return count;
 424 }
 425
 426 static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
 427 {
 428         producer_ffmpeg this = producer->child;
 429         int width;
 430         int height;
 431         int skip;
 432
 433         // Construct a test frame
 434         *frame = mlt_frame_init( );
 435
 436         // Are we at the position expected?
 437         producer_ffmpeg_position( this, mlt_producer_frame( producer ), &skip );
 438
 439         // Get properties objects
 440         mlt_properties producer_properties = mlt_producer_properties( &this->parent );
 441
 442         // Get the frames properties
 443         mlt_properties properties = mlt_frame_properties( *frame );
 444
 445         FILE *video = this->video;
 446
 447         mlt_properties_set_double( properties, "target", mlt_producer_frame( producer ) );
 448         mlt_properties_set_int( properties, "skip", skip );
 449
 450         // Read the video
 451         if ( video != NULL && read_ffmpeg_header( this, &width, &height ) == 2 )
 452         {
 453                 // Allocate an image
 454                 uint8_t *image = malloc( width * height * 2 );
 455
 456                 // Read it
 457                 while( skip -- )
 458                 {
 459                         if ( fread( this->buffer, width * height * 3 / 2, 1, video ) == 1 )
 460                                 read_ffmpeg_header( this, &width, &height );
 461                         else
 462                                 skip = 0;
 463                 }
 464
 465                 fread( this->buffer, width * height * 3 / 2, 1, video );
 466
 467                 // Convert it
 468                 mlt_convert_yuv420p_to_yuv422( this->buffer, width, height, width, image );
 469
 470                 // Pass the data on the frame properties
 471                 mlt_properties_set_data( properties, "image", image, width * height * 2, free, NULL );
 472                 mlt_properties_set_int( properties, "width", width );
 473                 mlt_properties_set_int( properties, "height", height );
 474                 mlt_properties_set_int( properties, "has_image", 1 );
 475
 476                 // Push the image callback
 477                 mlt_frame_push_get_image( *frame, producer_get_image );
 478
 479         }
 480         else
 481         {
 482                 // Clean up
 483                 if ( this->video != NULL )
 484                 {
 485                         int video_loop = mlt_properties_get_int( producer_properties, "video_loop" );
 486
 487                         // Inform caller that end of clip is reached
 488                         this->end_of_video = !video_loop;
 489                         rwpipe_close( this->video_pipe );
 490                         this->video = NULL;
 491                 }
 492
 493                 // Push the image callback
 494                 mlt_frame_push_get_image( *frame, producer_get_image );
 495         }
 496
 497         // Set the audio pipe
 498         mlt_properties_set_data( properties, "producer_ffmpeg", this, 0, NULL, NULL );
 499
 500         // Hmm - register audio callback
 501         ( *frame )->get_audio = producer_get_audio;
 502
 503         // Get the additional properties
 504         double aspect_ratio = mlt_properties_get_double( producer_properties, "aspect_ratio" );
 505         double speed = mlt_properties_get_double( producer_properties, "speed" );
 506         char *video_file = mlt_properties_get( producer_properties, "video_file" );
 507
 508         // Set them on the frame
 509         mlt_properties_set_double( properties, "aspect_ratio", aspect_ratio );
 510         mlt_properties_set_double( properties, "speed", speed );
 511         if ( strchr( video_file, '/' ) != NULL )
 512                 mlt_properties_set( properties, "file", strrchr( video_file, '/' ) + 1 );
 513         else
 514                 mlt_properties_set( properties, "file", video_file );
 515
 516
 517         // Set the out point on the producer
 518         if ( this->end_of_video && this->end_of_audio )
 519         {
 520                 mlt_properties_set_int( properties, "end_of_clip", 1 );
 521                 mlt_properties_set_timecode( producer_properties, "length", mlt_producer_position( &this->parent ) );
 522                 mlt_producer_set_in_and_out( &this->parent, mlt_producer_get_in( &this->parent ), mlt_producer_position( &this->parent ) );
 523         }
 524
 525         // Update timecode on the frame we're creating
 526         mlt_frame_set_timecode( *frame, mlt_producer_position( producer ) );
 527
 528         // Calculate the next timecode
 529         mlt_producer_prepare_next( producer );
 530
 531         return 0;
 532 }
 533
 534 static void producer_close( mlt_producer parent )
 535 {
 536         producer_ffmpeg this = parent->child;
 537         if ( this->video )
 538                 rwpipe_close( this->video_pipe );
 539         if ( this->audio )
 540                 rwpipe_close( this->audio_pipe );
 541         parent->close = NULL;
 542         mlt_producer_close( parent );
 543         free( this->buffer );
 544         free( this );
 545 }
 546