research.m1stereo.tv/gitweb/ - melted/blob - src/modules/avformat/factory.c

   1 /*
   2  * factory.c -- the factory method interfaces
   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 <string.h>
  22 #include <pthread.h>
  23
  24 #include <framework/mlt_factory.h>
  25 #include "producer_avformat.h"
  26 #include "consumer_avformat.h"
  27 #include "filter_avdeinterlace.h"
  28 #include "filter_avresample.h"
  29
  30 // ffmpeg Header files
  31 #include <avformat.h>
  32
  33 // A static flag used to determine if avformat has been initialised
  34 static int avformat_initialised = 0;
  35
  36 // A locking mutex
  37 static pthread_mutex_t avformat_mutex;
  38
  39 #if 0
  40 // These 3 functions should override the alloc functions in libavformat
  41 // but some formats or codecs seem to crash when used (wmv in particular)
  42
  43 void *av_malloc( unsigned int size )
  44 {
  45         return mlt_pool_alloc( size );
  46 }
  47
  48 void *av_realloc( void *ptr, unsigned int size )
  49 {
  50         return mlt_pool_realloc( ptr, size );
  51 }
  52
  53 void av_free( void *ptr )
  54 {
  55         return mlt_pool_release( ptr );
  56 }
  57 #endif
  58
  59 void avformat_destroy( void *ignore )
  60 {
  61         // Clean up
  62         av_free_static( );
  63
  64         // Destroy the mutex
  65         pthread_mutex_destroy( &avformat_mutex );
  66 }
  67
  68 void avformat_lock( )
  69 {
  70         // Lock the mutex now
  71         pthread_mutex_lock( &avformat_mutex );
  72 }
  73
  74 void avformat_unlock( )
  75 {
  76         // Unlock the mutex now
  77         pthread_mutex_unlock( &avformat_mutex );
  78 }
  79
  80 static void avformat_init( )
  81 {
  82         // Initialise avformat if necessary
  83         if ( avformat_initialised == 0 )
  84         {
  85                 avformat_initialised = 1;
  86                 pthread_mutex_init( &avformat_mutex, NULL );
  87                 av_register_all( );
  88                 mlt_factory_register_for_clean_up( NULL, avformat_destroy );
  89         }
  90 }
  91
  92 void *mlt_create_producer( char *id, void *arg )
  93 {
  94         avformat_init( );
  95         if ( !strcmp( id, "avformat" ) )
  96                 return producer_avformat_init( arg );
  97         return NULL;
  98 }
  99
 100 void *mlt_create_filter( char *id, void *arg )
 101 {
 102         avformat_init( );
 103         if ( !strcmp( id, "avdeinterlace" ) )
 104                 return filter_avdeinterlace_init( arg );
 105         if ( !strcmp( id, "avresample" ) )
 106                 return filter_avresample_init( arg );
 107         return NULL;
 108 }
 109
 110 void *mlt_create_transition( char *id, void *arg )
 111 {
 112         return NULL;
 113 }
 114
 115 void *mlt_create_consumer( char *id, void *arg )
 116 {
 117         avformat_init( );
 118         if ( !strcmp( id, "avformat" ) )
 119                 return consumer_avformat_init( arg );
 120         return NULL;
 121 }
 122