From d9e0f79cd98451e1b34a9ff83cf12d7ed401fbde Mon Sep 17 00:00:00 2001 From: lilo_booter Date: Sun, 26 Jun 2005 21:10:31 +0000 Subject: [PATCH] src/modules/core/filter_transition.c src/modules/core/filter_transition.h + Initial release git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@743 d19143bc-622f-0410-bfdd-b5b2a6649095 --- src/modules/core/filter_transition.c | 113 ++++++++++++++++++++++++++++++++++ src/modules/core/filter_transition.h | 28 ++++++++ 2 files changed, 141 insertions(+), 0 deletions(-) create mode 100644 src/modules/core/filter_transition.c create mode 100644 src/modules/core/filter_transition.h diff --git a/src/modules/core/filter_transition.c b/src/modules/core/filter_transition.c new file mode 100644 index 0000000..61c38be --- /dev/null +++ b/src/modules/core/filter_transition.c @@ -0,0 +1,113 @@ +/* + * filter_transition.c -- Convert any transition into a filter + * Copyright (C) 2005 Ushodaya Enterprises Limited + * Author: Charles Yates + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include "filter_transition.h" +#include +#include +#include + +/** Get the image via the transition. + NB: Not all transitions will accept a and b frames being the same... +*/ + +static int filter_get_image( mlt_frame this, uint8_t **image, mlt_image_format *format, int *width, int *height, int writable ) +{ + mlt_transition transition = mlt_frame_pop_service( this ); + mlt_transition_process( transition, this, this ); + return mlt_frame_get_image( this, image, format, width, height, writable ); +} + +/** Get the audio via the transition. + NB: Not all transitions will accept a and b frames being the same... +*/ + +static int filter_get_audio( mlt_frame this, int16_t **buffer, mlt_audio_format *format, int *frequency, int *channels, int *samples ) +{ + // Obtain the transition instance + mlt_transition transition = mlt_frame_pop_audio( this ); + mlt_transition_process( transition, this, this ); + return mlt_frame_get_audio( this, buffer, format, frequency, channels, samples ); +} + +/** Filter processing. +*/ + +static mlt_frame filter_process( mlt_filter this, mlt_frame frame ) +{ + // Obtain the transition instance + mlt_transition transition = mlt_properties_get_data( MLT_FILTER_PROPERTIES( this ), "instance", NULL ); + + // If we haven't created the instance, do it now + if ( transition == NULL ) + { + char *name = mlt_properties_get( MLT_FILTER_PROPERTIES( this ), "transition" ); + transition = mlt_factory_transition( name, NULL ); + mlt_properties_set_data( MLT_FILTER_PROPERTIES( this ), "instance", transition, 0, ( mlt_destructor )mlt_transition_close, NULL ); + } + + // We may still not have a transition... + if ( transition != NULL ) + { + // Get the transition type + int type = mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( transition ), "_transition_type" ); + + // Set the basic info + mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "in", mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "in" ) ); + mlt_properties_set_int( MLT_TRANSITION_PROPERTIES( transition ), "out", mlt_properties_get_int( MLT_FILTER_PROPERTIES( this ), "out" ) ); + + // Refresh with current user values + mlt_properties_pass( MLT_TRANSITION_PROPERTIES( transition ), MLT_FILTER_PROPERTIES( this ), "transition." ); + + if ( type & 1 ) + { + mlt_frame_push_service( frame, transition ); + mlt_frame_push_get_image( frame, filter_get_image ); + } + if ( type & 2 ) + { + mlt_frame_push_audio( frame, transition ); + mlt_frame_push_audio( frame, filter_get_audio ); + } + + if ( type == 0 ) + mlt_properties_debug( MLT_TRANSITION_PROPERTIES( transition ), "unknown transition type", stderr ); + } + else + { + mlt_properties_debug( MLT_FILTER_PROPERTIES( this ), "no transition", stderr ); + } + + return frame; +} + +/** Constructor for the filter. +*/ + +mlt_filter filter_transition_init( char *arg ) +{ + mlt_filter this = mlt_filter_new( ); + if ( this != NULL ) + { + mlt_properties_set( MLT_FILTER_PROPERTIES( this ), "transition", arg ); + this->process = filter_process; + } + return this; +} + diff --git a/src/modules/core/filter_transition.h b/src/modules/core/filter_transition.h new file mode 100644 index 0000000..f6dc6f6 --- /dev/null +++ b/src/modules/core/filter_transition.h @@ -0,0 +1,28 @@ +/* + * filter_transition.h -- Convert any transition into a filter + * Copyright (C) 2005 Ushodaya Enterprises Limited + * Author: Charles Yates + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifndef _FILTER_TRANSITION_H_ +#define _FILTER_TRANSITION_H_ + +#include + +extern mlt_filter filter_transition_init( char *arg ); + +#endif -- 1.7.4.4