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 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 <string.h>
  22 #include <pthread.h>
  23 #include <limits.h>
  24
  25 #include <framework/mlt.h>
  26
  27 extern mlt_consumer consumer_avformat_init( mlt_profile profile, char *file );
  28 extern mlt_filter filter_avcolour_space_init( void *arg );
  29 extern mlt_filter filter_avdeinterlace_init( void *arg );
  30 extern mlt_filter filter_avresample_init( char *arg );
  31 extern mlt_filter filter_swscale_init( mlt_profile profile, char *arg );
  32 extern mlt_producer producer_avformat_init( mlt_profile profile, char *file );
  33
  34 // ffmpeg Header files
  35 #include <avformat.h>
  36
  37 // A static flag used to determine if avformat has been initialised
  38 static int avformat_initialised = 0;
  39
  40 // A locking mutex
  41 static pthread_mutex_t avformat_mutex;
  42
  43 #if 0
  44 // These 3 functions should override the alloc functions in libavformat
  45 // but some formats or codecs seem to crash when used (wmv in particular)
  46
  47 void *av_malloc( unsigned int size )
  48 {
  49         return mlt_pool_alloc( size );
  50 }
  51
  52 void *av_realloc( void *ptr, unsigned int size )
  53 {
  54         return mlt_pool_realloc( ptr, size );
  55 }
  56
  57 void av_free( void *ptr )
  58 {
  59         return mlt_pool_release( ptr );
  60 }
  61 #endif
  62
  63 void avformat_destroy( void *ignore )
  64 {
  65         // Clean up
  66         // av_free_static( ); -XXX this is deprecated
  67
  68         // Destroy the mutex
  69         pthread_mutex_destroy( &avformat_mutex );
  70 }
  71
  72 void avformat_lock( )
  73 {
  74         // Lock the mutex now
  75         pthread_mutex_lock( &avformat_mutex );
  76 }
  77
  78 void avformat_unlock( )
  79 {
  80         // Unlock the mutex now
  81         pthread_mutex_unlock( &avformat_mutex );
  82 }
  83
  84 static void avformat_init( )
  85 {
  86         // Initialise avformat if necessary
  87         if ( avformat_initialised == 0 )
  88         {
  89                 avformat_initialised = 1;
  90                 pthread_mutex_init( &avformat_mutex, NULL );
  91                 av_register_all( );
  92                 mlt_factory_register_for_clean_up( NULL, avformat_destroy );
  93                 av_log_set_level( mlt_log_get_level() );
  94         }
  95 }
  96
  97 static void *create_service( mlt_profile profile, mlt_service_type type, const char *id, void *arg )
  98 {
  99         avformat_init( );
 100 #ifdef CODECS
 101         if ( !strcmp( id, "avformat" ) )
 102         {
 103                 if ( type == producer_type )
 104                         return producer_avformat_init( profile, arg );
 105                 else if ( type == consumer_type )
 106                         return consumer_avformat_init( profile, arg );
 107         }
 108 #endif
 109 #ifdef FILTERS
 110         if ( !strcmp( id, "avcolour_space" ) )
 111                 return filter_avcolour_space_init( arg );
 112         if ( !strcmp( id, "avdeinterlace" ) )
 113                 return filter_avdeinterlace_init( arg );
 114         if ( !strcmp( id, "avresample" ) )
 115                 return filter_avresample_init( arg );
 116 #ifdef SWSCALE
 117         if ( !strcmp( id, "swscale" ) )
 118                 return filter_swscale_init( profile, arg );
 119 #endif
 120 #endif
 121         return NULL;
 122 }
 123
 124 static mlt_properties avformat_metadata( mlt_service_type type, const char *id, void *data )
 125 {
 126         char file[ PATH_MAX ];
 127         char *service_type = NULL;
 128         switch ( type )
 129         {
 130                 case consumer_type:
 131                         service_type = "consumer";
 132                         break;
 133                 case filter_type:
 134                         service_type = "filter";
 135                         break;
 136                 case producer_type:
 137                         service_type = "producer";
 138                         break;
 139                 case transition_type:
 140                         service_type = "transition";
 141                         break;
 142                 default:
 143                         return NULL;
 144         }
 145         snprintf( file, PATH_MAX, "%s/avformat/%s_%s.yml", mlt_environment( "MLT_DATA" ), service_type, id );
 146         return mlt_properties_parse_yaml( file );
 147 }
 148
 149 MLT_REPOSITORY
 150 {
 151 #ifdef CODECS
 152         MLT_REGISTER( consumer_type, "avformat", create_service );
 153         MLT_REGISTER( producer_type, "avformat", create_service );
 154         MLT_REGISTER_METADATA( producer_type, "avformat", avformat_metadata, NULL );
 155 #endif
 156 #ifdef FILTERS
 157         MLT_REGISTER( filter_type, "avcolour_space", create_service );
 158         MLT_REGISTER( filter_type, "avcolor_space", create_service );
 159         MLT_REGISTER( filter_type, "avdeinterlace", create_service );
 160         MLT_REGISTER( filter_type, "avresample", create_service );
 161 #ifdef SWSCALE
 162         MLT_REGISTER( filter_type, "swscale", create_service );
 163 #endif
 164 #endif
 165 }