+++ /dev/null
-/*
- * filter_data_show.c -- data feed filter
- * Copyright (C) 2004-2005 Ushodaya Enterprises Limited
- * Author: Charles Yates <charles.yates@pandora.be>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <framework/mlt.h>
-#include <stdlib.h>
-#include <string.h>
-
-/** Handle the profile.
-*/
-
-static mlt_filter obtain_filter( mlt_filter filter, char *type )
-{
- // Result to return
- mlt_filter result = NULL;
-
- // Miscelaneous variable
- int i = 0;
- int type_len = strlen( type );
-
- // Get the properties of the data show filter
- mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
-
- // Get the profile properties
- mlt_properties profile_properties = mlt_properties_get_data( filter_properties, "profile_properties", NULL );
-
- // Obtain the profile_properties if we haven't already
- if ( profile_properties == NULL )
- {
- char temp[ 512 ];
-
- // Get the profile requested
- char *profile = mlt_properties_get( filter_properties, "resource" );
-
- // If none is specified, pick up the default for this normalisation
- if ( profile == NULL )
- sprintf( temp, "%s/feeds/%s/data_fx.properties", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ) );
- else if ( strchr( profile, '%' ) )
- sprintf( temp, "%s/feeds/%s/%s", mlt_environment( "MLT_DATA" ), mlt_environment( "MLT_NORMALISATION" ), strchr( profile, '%' ) + 1 );
- else
- strcpy( temp, profile );
-
- // Load the specified profile or use the default
- profile_properties = mlt_properties_load( temp );
-
- // Store for later retrieval
- mlt_properties_set_data( filter_properties, "profile_properties", profile_properties, 0, ( mlt_destructor )mlt_properties_close, NULL );
- }
-
- if ( profile_properties != NULL )
- {
- for ( i = 0; i < mlt_properties_count( profile_properties ); i ++ )
- {
- char *name = mlt_properties_get_name( profile_properties, i );
- char *value = mlt_properties_get_value( profile_properties, i );
-
- if ( result == NULL && !strcmp( name, type ) && result == NULL )
- result = mlt_factory_filter( mlt_service_profile( MLT_FILTER_SERVICE( filter ) ), value, NULL );
- else if ( result != NULL && !strncmp( name, type, type_len ) && name[ type_len ] == '.' )
- mlt_properties_set( MLT_FILTER_PROPERTIES( result ), name + type_len + 1, value );
- else if ( result != NULL )
- break;
- }
- }
-
- return result;
-}
-
-/** Retrieve medatata value
-*/
-
-char* metadata_value(mlt_properties properties, char* name)
-{
- if (name == NULL) return NULL;
- char *meta = malloc( strlen(name) + 18 );
- sprintf( meta, "meta.attr.%s.markup", name);
- char *result = mlt_properties_get( properties, meta);
- free(meta);
- return result;
-}
-
-/** Convert frames to Timecode
-*/
-
-char* frame_to_timecode( int frames , int fps)
-{
- if (fps == 0) return strdup("-");
- char *res = malloc(12);
- int seconds = frames / (int) fps;
- frames = frames % ((int) fps);
- int minutes = seconds / 60;
- seconds = seconds % 60;
- int hours = minutes / 60;
- minutes = minutes % 60;
- sprintf(res, "%.2d:%.2d:%.2d:%.2d", hours, minutes, seconds, frames);
- return res;
-}
-
-/** Process the frame for the requested type
-*/
-
-static int process_feed( mlt_properties feed, mlt_filter filter, mlt_frame frame )
-{
- // Error return
- int error = 1;
-
- // Get the properties of the data show filter
- mlt_properties filter_properties = MLT_FILTER_PROPERTIES( filter );
-
- // Get the type requested by the feeding filter
- char *type = mlt_properties_get( feed, "type" );
-
- // Fetch the filter associated to this type
- mlt_filter requested = mlt_properties_get_data( filter_properties, type, NULL );
-
- // If it doesn't exist, then create it now
- if ( requested == NULL )
- {
- // Source filter from profile
- requested = obtain_filter( filter, type );
-
- // Store it on the properties for subsequent retrieval/destruction
- mlt_properties_set_data( filter_properties, type, requested, 0, ( mlt_destructor )mlt_filter_close, NULL );
- }
-
- // If we have one, then process it now...
- if ( requested != NULL )
- {
- int i = 0;
- mlt_properties properties = MLT_FILTER_PROPERTIES( requested );
- static const char *prefix = "properties.";
- int len = strlen( prefix );
-
- // Determine if this is an absolute or relative feed
- int absolute = mlt_properties_get_int( feed, "absolute" );
-
- // Make do with what we have
- int length = !absolute ?
- mlt_properties_get_int( feed, "out" ) - mlt_properties_get_int( feed, "in" ) + 1 :
- mlt_properties_get_int( feed, "out" ) + 1;
-
- // Repeat period
- int period = mlt_properties_get_int( properties, "period" );
- period = period == 0 ? 1 : period;
-
- // Pass properties from feed into requested
- for ( i = 0; i < mlt_properties_count( properties ); i ++ )
- {
- char *name = mlt_properties_get_name( properties, i );
- char *key = mlt_properties_get_value( properties, i );
- if ( !strncmp( name, prefix, len ) )
- {
- if ( !strncmp( name + len, "length[", 7 ) )
- {
- mlt_properties_set_position( properties, key, ( length - period ) / period );
- }
- else
- {
- char *value = mlt_properties_get( feed, name + len );
- if ( value != NULL )
- {
- // check for metadata keywords in metadata markup if user requested so
- if ( mlt_properties_get_int( filter_properties, "dynamic" ) == 1 && !strcmp( name + strlen( name ) - 6, "markup") )
- {
- // Find keywords which should be surrounded by '#', like: #title#
- char* keywords = strtok( value, "#" );
- char result[512] = ""; // XXX: how much is enough?
- int ct = 0;
- int fromStart = ( value[0] == '#' ) ? 1 : 0;
-
- while ( keywords != NULL )
- {
- if ( ct % 2 == fromStart )
- {
- // backslash in front of # suppresses substitution
- if ( keywords[ strlen( keywords ) -1 ] == '\\' )
- {
- // keep characters except backslash
- strncat( result, keywords, strlen( keywords ) -1 );
- strcat( result, "#" );
- ct++;
- }
- else
- {
- strcat( result, keywords );
- }
- }
- else if ( !strcmp( keywords, "timecode" ) )
- {
- // special case: replace #timecode# with current frame timecode
- int pos = mlt_properties_get_int( feed, "position" );
- char *tc = frame_to_timecode( pos, mlt_profile_fps( mlt_service_profile( MLT_FILTER_SERVICE( filter ) ) ) );
- strcat( result, tc );
- free( tc );
- }
- else
- {
- // replace keyword with metadata value
- char *metavalue = metadata_value( MLT_FRAME_PROPERTIES( frame ), keywords );
- strcat( result, metavalue ? metavalue : "-" );
- }
- keywords = strtok( NULL, "#" );
- ct++;
- }
- mlt_properties_set( properties, key, (char*) result );
- }
- else mlt_properties_set( properties, key, value );
- }
- }
- }
- }
-
- // Set the original position on the frame
- if ( absolute == 0 )
- mlt_frame_set_position( frame, mlt_properties_get_int( feed, "position" ) - mlt_properties_get_int( feed, "in" ) );
- else
- mlt_frame_set_position( frame, mlt_properties_get_int( feed, "position" ) );
-
- // Process the filter
- mlt_filter_process( requested, frame );
-
- // Should be ok...
- error = 0;
- }
-
- return error;
-}
-
-void process_queue( mlt_deque data_queue, mlt_frame frame, mlt_filter filter )
-{
- if ( data_queue != NULL )
- {
- // Create a new queue for those that we can't handle
- mlt_deque temp_queue = mlt_deque_init( );
-
- // Iterate through each entry on the queue
- while ( mlt_deque_peek_front( data_queue ) != NULL )
- {
- // Get the data feed
- mlt_properties feed = mlt_deque_pop_front( data_queue );
-
- if ( mlt_properties_get( MLT_FILTER_PROPERTIES( filter ), "debug" ) != NULL )
- mlt_properties_debug( feed, mlt_properties_get( MLT_FILTER_PROPERTIES( filter ), "debug" ), stderr );
-
- // Process the data feed...
- if ( process_feed( feed, filter, frame ) == 0 )
- mlt_properties_close( feed );
- else
- mlt_deque_push_back( temp_queue, feed );
- }
-
- // Now put the unprocessed feeds back on the stack
- while ( mlt_deque_peek_front( temp_queue ) )
- {
- // Get the data feed
- mlt_properties feed = mlt_deque_pop_front( temp_queue );
-
- // Put it back on the data queue
- mlt_deque_push_back( data_queue, feed );
- }
-
- // Close the temporary queue
- mlt_deque_close( temp_queue );
- }
-}
-
-/** Get the image.
-*/
-
-static int filter_get_image( mlt_frame frame, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable )
-{
- // Pop the service
- mlt_filter filter = mlt_frame_pop_service( frame );
-
- // Get the frame properties
- mlt_properties frame_properties = MLT_FRAME_PROPERTIES( frame );
-
- // Track specific
- process_queue( mlt_properties_get_data( frame_properties, "data_queue", NULL ), frame, filter );
-
- // Global
- process_queue( mlt_properties_get_data( frame_properties, "global_queue", NULL ), frame, filter );
-
- // Need to get the image
- return mlt_frame_get_image( frame, image, format, width, height, 1 );
-}
-
-
-/** Filter processing.
-*/
-
-static mlt_frame filter_process( mlt_filter this, mlt_frame frame )
-{
- // Push the filter
- mlt_frame_push_service( frame, this );
-
- // Register the get image method
- mlt_frame_push_get_image( frame, filter_get_image );
-
- // Return the frame
- return frame;
-}
-
-/** Constructor for the filter.
-*/
-
-mlt_filter filter_data_show_init( mlt_profile profile, mlt_service_type type, const char *id, void *arg )
-{
- // Create the filter
- mlt_filter this = mlt_filter_new( );
-
- // Initialise it
- if ( this != NULL )
- {
- // Get the properties
- mlt_properties properties = MLT_FILTER_PROPERTIES( this );
-
- // Assign the argument (default to titles)
- mlt_properties_set( properties, "resource", arg == NULL ? NULL : arg );
-
- // Specify the processing method
- this->process = filter_process;
- }
-
- return this;
-}
-
projects / melted / blobdiff