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500 lines
16 KiB
500 lines
16 KiB
/*
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* producer_pixbuf.c -- raster image loader based upon gdk-pixbuf
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* Copyright (C) 2003-2004 Ushodaya Enterprises Limited
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* Author: Dan Dennedy <dan@dennedy.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "producer_pixbuf.h"
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#include <framework/mlt_frame.h>
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <pthread.h>
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#include <math.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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static pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER;
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typedef struct producer_pixbuf_s *producer_pixbuf;
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struct producer_pixbuf_s
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{
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struct mlt_producer_s parent;
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// File name list
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mlt_properties filenames;
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int count;
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int image_idx;
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int width;
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int height;
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uint8_t *image;
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uint8_t *alpha;
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};
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static int producer_get_frame( mlt_producer parent, mlt_frame_ptr frame, int index );
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static void producer_close( mlt_producer parent );
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mlt_producer producer_pixbuf_init( char *filename )
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{
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producer_pixbuf this = calloc( sizeof( struct producer_pixbuf_s ), 1 );
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if ( this != NULL && mlt_producer_init( &this->parent, this ) == 0 )
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{
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mlt_producer producer = &this->parent;
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// Get the properties interface
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mlt_properties properties = MLT_PRODUCER_PROPERTIES( &this->parent );
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// Callback registration
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producer->get_frame = producer_get_frame;
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producer->close = ( mlt_destructor )producer_close;
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// Set the default properties
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mlt_properties_set( properties, "resource", filename );
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mlt_properties_set_int( properties, "ttl", 25 );
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mlt_properties_set_int( properties, "aspect_ratio", 1 );
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mlt_properties_set_int( properties, "progressive", 1 );
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return producer;
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}
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free( this );
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return NULL;
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}
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static void refresh_image( mlt_frame frame, int width, int height )
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{
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// Pixbuf
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GdkPixbuf *pixbuf = mlt_properties_get_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", NULL );
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GError *error = NULL;
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// Obtain properties of frame
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mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
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// Obtain the producer for this frame
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producer_pixbuf this = mlt_properties_get_data( properties, "producer_pixbuf", NULL );
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// Obtain the producer
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mlt_producer producer = &this->parent;
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// Obtain properties of producer
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mlt_properties producer_props = MLT_PRODUCER_PROPERTIES( producer );
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// Obtain the cache flag and structure
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int use_cache = mlt_properties_get_int( producer_props, "cache" );
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mlt_properties cache = mlt_properties_get_data( producer_props, "_cache", NULL );
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int update_cache = 0;
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// Get the time to live for each frame
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double ttl = mlt_properties_get_int( producer_props, "ttl" );
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// Get the original position of this frame
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mlt_position position = mlt_properties_get_position( properties, "pixbuf_position" );
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// Image index
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int image_idx = ( int )floor( ( double )position / ttl ) % this->count;
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// Key for the cache
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char image_key[ 10 ];
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sprintf( image_key, "%d", image_idx );
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pthread_mutex_lock( &fastmutex );
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// Check if the frame is already loaded
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if ( use_cache )
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{
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if ( cache == NULL )
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{
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cache = mlt_properties_new( );
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mlt_properties_set_data( producer_props, "_cache", cache, 0, ( mlt_destructor )mlt_properties_close, NULL );
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}
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mlt_frame cached = mlt_properties_get_data( cache, image_key, NULL );
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if ( cached )
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{
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this->image_idx = image_idx;
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mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
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this->width = mlt_properties_get_int( cached_props, "width" );
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this->height = mlt_properties_get_int( cached_props, "height" );
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mlt_properties_set_int( producer_props, "_real_width", mlt_properties_get_int( cached_props, "real_width" ) );
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mlt_properties_set_int( producer_props, "_real_height", mlt_properties_get_int( cached_props, "real_height" ) );
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this->image = mlt_properties_get_data( cached_props, "image", NULL );
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this->alpha = mlt_properties_get_data( cached_props, "alpha", NULL );
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if ( width != 0 && ( width != this->width || height != this->height ) )
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this->image = NULL;
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}
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}
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// optimization for subsequent iterations on single picture
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if ( width != 0 && this->image != NULL && image_idx == this->image_idx )
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{
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if ( width != this->width || height != this->height )
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{
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pixbuf = mlt_properties_get_data( producer_props, "_pixbuf", NULL );
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if ( !use_cache )
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{
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mlt_pool_release( this->image );
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mlt_pool_release( this->alpha );
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}
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this->image = NULL;
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this->alpha = NULL;
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}
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}
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else if ( pixbuf == NULL && ( this->image == NULL || image_idx != this->image_idx ) )
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{
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if ( !use_cache )
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{
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mlt_pool_release( this->image );
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mlt_pool_release( this->alpha );
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}
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this->image = NULL;
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this->alpha = NULL;
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this->image_idx = image_idx;
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pixbuf = gdk_pixbuf_new_from_file( mlt_properties_get_value( this->filenames, image_idx ), &error );
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if ( pixbuf != NULL )
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{
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// Register this pixbuf for destruction and reuse
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mlt_events_block( producer_props, NULL );
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mlt_properties_set_data( producer_props, "_pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
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g_object_ref( pixbuf );
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mlt_properties_set_data( MLT_FRAME_PROPERTIES( frame ), "pixbuf", pixbuf, 0, ( mlt_destructor )g_object_unref, NULL );
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mlt_properties_set_int( producer_props, "_real_width", gdk_pixbuf_get_width( pixbuf ) );
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mlt_properties_set_int( producer_props, "_real_height", gdk_pixbuf_get_height( pixbuf ) );
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mlt_events_unblock( producer_props, NULL );
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// Store the width/height of the pixbuf temporarily
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this->width = gdk_pixbuf_get_width( pixbuf );
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this->height = gdk_pixbuf_get_height( pixbuf );
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}
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}
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// If we have a pixbuf
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if ( pixbuf && width > 0 )
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{
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char *interps = mlt_properties_get( properties, "rescale.interp" );
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int interp = GDK_INTERP_BILINEAR;
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if ( strcmp( interps, "nearest" ) == 0 )
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interp = GDK_INTERP_NEAREST;
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else if ( strcmp( interps, "tiles" ) == 0 )
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interp = GDK_INTERP_TILES;
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else if ( strcmp( interps, "hyper" ) == 0 )
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interp = GDK_INTERP_HYPER;
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// Note - the original pixbuf is already safe and ready for destruction
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pixbuf = gdk_pixbuf_scale_simple( pixbuf, width, height, interp );
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// Store width and height
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this->width = width;
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this->height = height;
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// Allocate/define image
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this->image = mlt_pool_alloc( width * ( height + 1 ) * 2 );
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// Extract YUV422 and alpha
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if ( gdk_pixbuf_get_has_alpha( pixbuf ) )
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{
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// Allocate the alpha mask
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this->alpha = mlt_pool_alloc( this->width * this->height );
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// Convert the image
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mlt_convert_rgb24a_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
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this->width, this->height,
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gdk_pixbuf_get_rowstride( pixbuf ),
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this->image, this->alpha );
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}
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else
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{
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// No alpha to extract
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mlt_convert_rgb24_to_yuv422( gdk_pixbuf_get_pixels( pixbuf ),
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this->width, this->height,
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gdk_pixbuf_get_rowstride( pixbuf ),
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this->image );
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}
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// Finished with pixbuf now
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g_object_unref( pixbuf );
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// Ensure we update the cache when we need to
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update_cache = use_cache;
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}
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// Set width/height of frame
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mlt_properties_set_int( properties, "width", this->width );
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mlt_properties_set_int( properties, "height", this->height );
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mlt_properties_set_int( properties, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
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mlt_properties_set_int( properties, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
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// pass the image data without destructor
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mlt_properties_set_data( properties, "image", this->image, this->width * ( this->height + 1 ) * 2, NULL, NULL );
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mlt_properties_set_data( properties, "alpha", this->alpha, this->width * this->height, NULL, NULL );
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if ( update_cache )
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{
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mlt_frame cached = mlt_frame_init( );
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mlt_properties cached_props = MLT_FRAME_PROPERTIES( cached );
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mlt_properties_set_int( cached_props, "width", this->width );
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mlt_properties_set_int( cached_props, "height", this->height );
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mlt_properties_set_int( cached_props, "real_width", mlt_properties_get_int( producer_props, "_real_width" ) );
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mlt_properties_set_int( cached_props, "real_height", mlt_properties_get_int( producer_props, "_real_height" ) );
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mlt_properties_set_data( cached_props, "image", this->image, this->width * ( this->height + 1 ) * 2, mlt_pool_release, NULL );
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mlt_properties_set_data( cached_props, "alpha", this->alpha, this->width * this->height, mlt_pool_release, NULL );
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mlt_properties_set_data( cache, image_key, cached, 0, ( mlt_destructor )mlt_frame_close, NULL );
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}
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pthread_mutex_unlock( &fastmutex );
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}
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static int producer_get_image( mlt_frame frame, uint8_t **buffer, mlt_image_format *format, int *width, int *height, int writable )
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{
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// Obtain properties of frame
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mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
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// We need to know the size of the image to clone it
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int image_size = 0;
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int alpha_size = 0;
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// Alpha channel
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uint8_t *alpha = NULL;
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*width = mlt_properties_get_int( properties, "rescale_width" );
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*height = mlt_properties_get_int( properties, "rescale_height" );
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// Refresh the image
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refresh_image( frame, *width, *height );
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// Get the image
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*buffer = mlt_properties_get_data( properties, "image", &image_size );
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alpha = mlt_properties_get_data( properties, "alpha", &alpha_size );
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// Get width and height (may have changed during the refresh)
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*width = mlt_properties_get_int( properties, "width" );
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*height = mlt_properties_get_int( properties, "height" );
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// NB: Cloning is necessary with this producer (due to processing of images ahead of use)
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// The fault is not in the design of mlt, but in the implementation of the pixbuf producer...
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if ( *buffer != NULL )
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{
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if ( *format == mlt_image_yuv422 || *format == mlt_image_yuv420p )
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{
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// Clone the image and the alpha
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uint8_t *image_copy = mlt_pool_alloc( image_size );
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uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
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memcpy( image_copy, *buffer, image_size );
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// Copy or default the alpha
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if ( alpha != NULL )
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memcpy( alpha_copy, alpha, alpha_size );
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else
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memset( alpha_copy, 255, alpha_size );
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// Now update properties so we free the copy after
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mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
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mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
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// We're going to pass the copy on
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*buffer = image_copy;
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}
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else if ( *format == mlt_image_rgb24a )
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{
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// Clone the image and the alpha
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image_size = *width * ( *height + 1 ) * 4;
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alpha_size = *width * ( *height + 1 );
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uint8_t *image_copy = mlt_pool_alloc( image_size );
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uint8_t *alpha_copy = mlt_pool_alloc( alpha_size );
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mlt_convert_yuv422_to_rgb24a(*buffer, image_copy, (*width)*(*height));
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// Now update properties so we free the copy after
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mlt_properties_set_data( properties, "image", image_copy, image_size, mlt_pool_release, NULL );
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mlt_properties_set_data( properties, "alpha", alpha_copy, alpha_size, mlt_pool_release, NULL );
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// We're going to pass the copy on
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*buffer = image_copy;
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}
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}
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else
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{
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// TODO: Review all cases of invalid images
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*buffer = mlt_pool_alloc( 50 * 50 * 2 );
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mlt_properties_set_data( properties, "image", *buffer, image_size, mlt_pool_release, NULL );
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*width = 50;
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*height = 50;
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}
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return 0;
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}
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static uint8_t *producer_get_alpha_mask( mlt_frame this )
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{
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// Obtain properties of frame
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mlt_properties properties = MLT_FRAME_PROPERTIES( this );
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// Return the alpha mask
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return mlt_properties_get_data( properties, "alpha", NULL );
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}
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static int producer_get_frame( mlt_producer producer, mlt_frame_ptr frame, int index )
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{
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// Get the real structure for this producer
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producer_pixbuf this = producer->child;
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// Fetch the producers properties
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mlt_properties producer_properties = MLT_PRODUCER_PROPERTIES( producer );
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if ( this->filenames == NULL && mlt_properties_get( producer_properties, "resource" ) != NULL )
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{
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char *filename = mlt_properties_get( producer_properties, "resource" );
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this->filenames = mlt_properties_new( );
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// Read xml string
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if ( strstr( filename, "<svg" ) )
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{
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// Generate a temporary file for the svg
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char fullname[ 1024 ] = "/tmp/mlt.XXXXXX";
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int fd = mkstemp( fullname );
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if ( fd > -1 )
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{
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// Write the svg into the temp file
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ssize_t remaining_bytes;
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char *xml = filename;
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// Strip leading crap
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while ( xml[0] != '<' )
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xml++;
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remaining_bytes = strlen( xml );
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while ( remaining_bytes > 0 )
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remaining_bytes -= write( fd, xml + strlen( xml ) - remaining_bytes, remaining_bytes );
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close( fd );
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mlt_properties_set( this->filenames, "0", fullname );
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// Teehe - when the producer closes, delete the temp file and the space allo
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mlt_properties_set_data( producer_properties, "__temporary_file__", fullname, 0, ( mlt_destructor )unlink, NULL );
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}
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}
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// Obtain filenames
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else if ( strchr( filename, '%' ) != NULL )
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{
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// handle picture sequences
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int i = mlt_properties_get_int( producer_properties, "begin" );
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int gap = 0;
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char full[1024];
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int keyvalue = 0;
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char key[ 50 ];
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while ( gap < 100 )
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{
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struct stat buf;
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snprintf( full, 1023, filename, i ++ );
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if ( stat( full, &buf ) == 0 )
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{
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sprintf( key, "%d", keyvalue ++ );
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mlt_properties_set( this->filenames, "0", full );
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gap = 0;
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}
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else
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{
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gap ++;
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}
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}
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}
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else if ( strstr( filename, "/.all." ) != NULL )
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{
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char wildcard[ 1024 ];
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char *dir_name = strdup( filename );
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char *extension = strrchr( dir_name, '.' );
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*( strstr( dir_name, "/.all." ) + 1 ) = '\0';
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sprintf( wildcard, "*%s", extension );
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mlt_properties_dir_list( this->filenames, dir_name, wildcard, 1 );
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free( dir_name );
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}
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else
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{
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mlt_properties_set( this->filenames, "0", filename );
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}
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this->count = mlt_properties_count( this->filenames );
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}
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// Generate a frame
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*frame = mlt_frame_init( );
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if ( *frame != NULL && this->count > 0 )
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{
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// Obtain properties of frame and producer
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mlt_properties properties = MLT_FRAME_PROPERTIES( *frame );
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// Set the producer on the frame properties
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mlt_properties_set_data( properties, "producer_pixbuf", this, 0, NULL, NULL );
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// Update timecode on the frame we're creating
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mlt_frame_set_position( *frame, mlt_producer_position( producer ) );
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// Ensure that we have a way to obtain the position in the get_image
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mlt_properties_set_position( properties, "pixbuf_position", mlt_producer_position( producer ) );
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// Refresh the image
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refresh_image( *frame, 0, 0 );
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// Set producer-specific frame properties
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mlt_properties_set_int( properties, "progressive", mlt_properties_get_int( producer_properties, "progressive" ) );
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mlt_properties_set_double( properties, "aspect_ratio", mlt_properties_get_double( producer_properties, "aspect_ratio" ) );
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|
|
// Set alpha call back
|
|
( *frame )->get_alpha_mask = producer_get_alpha_mask;
|
|
|
|
// Push the get_image method
|
|
mlt_frame_push_get_image( *frame, producer_get_image );
|
|
}
|
|
|
|
// Calculate the next timecode
|
|
mlt_producer_prepare_next( producer );
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void producer_close( mlt_producer parent )
|
|
{
|
|
producer_pixbuf this = parent->child;
|
|
if ( !mlt_properties_get_int( MLT_PRODUCER_PROPERTIES( parent ), "cache" ) )
|
|
{
|
|
mlt_pool_release( this->image );
|
|
mlt_pool_release( this->alpha );
|
|
}
|
|
parent->close = NULL;
|
|
mlt_producer_close( parent );
|
|
mlt_properties_close( this->filenames );
|
|
free( this );
|
|
}
|