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434 lines
14 KiB
434 lines
14 KiB
/*****************************************************************************
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* fake.c: decoder reading from a fake stream, outputting a fixed image
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*****************************************************************************
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* Copyright (C) 2005-2009 the VideoLAN team
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* $Id$
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*
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* Authors: Christophe Massiot <massiot@via.ecp.fr>
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* Jean-Paul Saman <jpsaman at m2x dot nl>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; 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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/*****************************************************************************
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* Preamble
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <vlc_common.h>
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#include <vlc_plugin.h>
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#include <vlc_codec.h>
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#include <vlc_image.h>
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#include <vlc_filter.h>
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int OpenDecoder ( vlc_object_t * );
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static void CloseDecoder ( vlc_object_t * );
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static picture_t *DecodeBlock ( decoder_t *, block_t ** );
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static int FakeCallback( vlc_object_t *, char const *,
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vlc_value_t, vlc_value_t, void * );
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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#define FILE_TEXT N_("Image file")
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#define FILE_LONGTEXT N_( \
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"Path of the image file for fake input." )
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#define RELOAD_TEXT N_("Reload image file")
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#define RELOAD_LONGTEXT N_( \
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"Reload image file every n seconds." )
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#define WIDTH_TEXT N_("Video width")
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#define WIDTH_LONGTEXT N_( \
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"Output video width." )
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#define HEIGHT_TEXT N_("Video height")
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#define HEIGHT_LONGTEXT N_( \
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"Output video height." )
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#define KEEP_AR_TEXT N_("Keep aspect ratio")
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#define KEEP_AR_LONGTEXT N_( \
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"Consider width and height as maximum values." )
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#define ASPECT_RATIO_TEXT N_("Background aspect ratio")
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#define ASPECT_RATIO_LONGTEXT N_( \
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"Aspect ratio of the image file (4:3, 16:9). Default is square pixels." )
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#define DEINTERLACE_TEXT N_("Deinterlace video")
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#define DEINTERLACE_LONGTEXT N_( \
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"Deinterlace the image after loading it." )
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#define DEINTERLACE_MODULE_TEXT N_("Deinterlace module")
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#define DEINTERLACE_MODULE_LONGTEXT N_( \
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"Deinterlace module to use." )
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#define CHROMA_TEXT N_("Chroma used")
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#define CHROMA_LONGTEXT N_( \
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"Force use of a specific chroma for output. Default is I420." )
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static const char *const ppsz_deinterlace_type[] =
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{
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"deinterlace", "ffmpeg-deinterlace"
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};
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vlc_module_begin ()
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_VCODEC )
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set_shortname( N_("Fake") )
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set_description( N_("Fake video decoder") )
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set_capability( "decoder", 1000 )
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set_callbacks( OpenDecoder, CloseDecoder )
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add_shortcut( "fake" )
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add_file( "fake-file", "", NULL, FILE_TEXT,
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FILE_LONGTEXT, false )
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add_integer( "fake-file-reload", 0, NULL, RELOAD_TEXT,
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RELOAD_LONGTEXT, false )
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add_integer( "fake-width", 0, NULL, WIDTH_TEXT,
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WIDTH_LONGTEXT, true )
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add_integer( "fake-height", 0, NULL, HEIGHT_TEXT,
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HEIGHT_LONGTEXT, true )
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add_bool( "fake-keep-ar", false, NULL, KEEP_AR_TEXT, KEEP_AR_LONGTEXT,
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true )
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add_string( "fake-aspect-ratio", "", NULL,
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ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, true )
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add_bool( "fake-deinterlace", false, NULL, DEINTERLACE_TEXT,
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DEINTERLACE_LONGTEXT, false )
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add_string( "fake-deinterlace-module", "deinterlace", NULL,
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DEINTERLACE_MODULE_TEXT, DEINTERLACE_MODULE_LONGTEXT,
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false )
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change_string_list( ppsz_deinterlace_type, 0, 0 )
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add_string( "fake-chroma", "I420", NULL, CHROMA_TEXT, CHROMA_LONGTEXT,
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true )
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vlc_module_end ()
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struct decoder_sys_t
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{
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picture_t *p_image;
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vlc_mutex_t lock;
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bool b_reload;
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mtime_t i_reload;
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mtime_t i_next;
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};
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/*****************************************************************************
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* OpenDecoder: probe the decoder and return score
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*****************************************************************************/
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static int OpenDecoder( vlc_object_t *p_this )
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{
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decoder_t *p_dec = (decoder_t*)p_this;
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image_handler_t *p_handler;
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video_format_t fmt_in, fmt_out;
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picture_t *p_image;
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char *psz_file, *psz_chroma, *psz_string;
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bool b_keep_ar;
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int i_aspect = 0;
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int i_int;
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if( p_dec->fmt_in.i_codec != VLC_FOURCC('f','a','k','e') )
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{
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return VLC_EGENERIC;
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}
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p_dec->p_sys = calloc( 1, sizeof( *p_dec->p_sys ) );
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if( !p_dec->p_sys )
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return VLC_ENOMEM;
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psz_file = var_CreateGetNonEmptyStringCommand( p_dec, "fake-file" );
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if( !psz_file )
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{
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msg_Err( p_dec, "specify a file with --fake-file=..." );
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free( p_dec->p_sys );
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return VLC_EGENERIC;
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}
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memset( &fmt_in, 0, sizeof(fmt_in) );
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memset( &fmt_out, 0, sizeof(fmt_out) );
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i_int = var_CreateGetIntegerCommand( p_dec, "fake-file-reload" );
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if( i_int > 0)
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{
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p_dec->p_sys->b_reload = true;
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p_dec->p_sys->i_reload = (mtime_t)(i_int * 1000000);
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p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
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}
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psz_chroma = var_CreateGetString( p_dec, "fake-chroma" );
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fmt_out.i_chroma = vlc_fourcc_GetCodecFromString( VIDEO_ES, psz_chroma );
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if( !fmt_out.i_chroma )
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{
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msg_Warn( p_dec, "Invalid chroma (%s). Using I420.", psz_chroma );
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fmt_out.i_chroma = VLC_CODEC_I420;
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}
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free( psz_chroma );
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var_Create( p_dec, "fake-width", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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var_Create( p_dec, "fake-height", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
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psz_string = var_CreateGetString( p_dec, "fake-aspect-ratio" );
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if( psz_string )
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{
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char *psz_parser = strchr( psz_string, ':' );
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if( psz_parser )
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{
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*psz_parser++ = '\0';
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i_aspect = atoi( psz_string )
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* VOUT_ASPECT_FACTOR / atoi( psz_parser );
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}
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free( psz_string );
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}
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b_keep_ar = var_CreateGetBool( p_dec, "fake-keep-ar" );
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if( !b_keep_ar )
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{
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fmt_out.i_width = var_GetInteger( p_dec, "fake-width" );
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fmt_out.i_height = var_GetInteger( p_dec, "fake-height" );
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}
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p_handler = image_HandlerCreate( p_dec );
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p_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
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image_HandlerDelete( p_handler );
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if ( p_image == NULL )
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{
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msg_Err( p_dec, "unable to read image file %s", psz_file );
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free( psz_file );
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free( p_dec->p_sys );
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return VLC_EGENERIC;
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}
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msg_Dbg( p_dec, "file %s loaded successfully", psz_file );
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free( psz_file );
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if ( b_keep_ar )
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{
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picture_t *p_old = p_image;
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int i_width, i_height;
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i_width = var_GetInteger( p_dec, "fake-width" );
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i_height = var_GetInteger( p_dec, "fake-height" );
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if ( i_width && i_height )
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{
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int i_image_ar = fmt_out.i_width * VOUT_ASPECT_FACTOR
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/ fmt_out.i_height;
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int i_region_ar = i_width * VOUT_ASPECT_FACTOR / i_height;
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fmt_in = fmt_out;
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if ( i_aspect == i_image_ar )
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{
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fmt_out.i_width = i_width;
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fmt_out.i_height = i_height;
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}
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else if ( i_image_ar > i_region_ar )
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{
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fmt_out.i_width = i_width;
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fmt_out.i_height = i_width * VOUT_ASPECT_FACTOR
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/ i_image_ar;
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i_aspect = i_image_ar;
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}
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else
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{
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fmt_out.i_height = i_height;
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fmt_out.i_width = i_height * i_image_ar
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/ VOUT_ASPECT_FACTOR;
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i_aspect = i_image_ar;
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}
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p_handler = image_HandlerCreate( p_dec );
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p_image = image_Convert( p_handler, p_old, &fmt_in, &fmt_out );
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image_HandlerDelete( p_handler );
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if ( p_image == NULL )
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{
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msg_Warn( p_dec, "couldn't load resizing module" );
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p_image = p_old;
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fmt_out = fmt_in;
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}
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else
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{
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picture_Release( p_old );
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}
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}
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}
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if ( i_aspect )
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{
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fmt_out.i_sar_num = i_aspect * fmt_out.i_height;
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fmt_out.i_sar_den = VOUT_ASPECT_FACTOR * fmt_out.i_width;
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}
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else
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{
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fmt_out.i_sar_num = 1;
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fmt_out.i_sar_den = 1;
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}
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if( var_CreateGetBool( p_dec, "fake-deinterlace" ) )
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{
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picture_t *p_old = p_image;
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psz_string = var_CreateGetString( p_dec, "fake-deinterlace-module" );
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p_handler = image_HandlerCreate( p_dec );
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p_image = image_Filter( p_handler, p_old, &fmt_out, psz_string );
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image_HandlerDelete( p_handler );
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free( psz_string );
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if ( p_image == NULL )
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{
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msg_Warn( p_dec, "couldn't load deinterlace module" );
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p_image = p_old;
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}
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else
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{
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picture_Release( p_old );
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}
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}
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/* Set output properties */
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p_dec->fmt_out.i_cat = VIDEO_ES;
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p_dec->fmt_out.i_codec = fmt_out.i_chroma;
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p_dec->fmt_out.video = fmt_out;
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/* Set callbacks */
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p_dec->pf_decode_video = DecodeBlock;
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p_dec->p_sys->p_image = p_image;
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vlc_mutex_init( &p_dec->p_sys->lock );
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/* Add the callback when every variables are available */
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var_AddCallback( p_dec, "fake-file", FakeCallback, p_dec );
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var_AddCallback( p_dec, "fake-file-reload", FakeCallback , p_dec );
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return VLC_SUCCESS;
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}
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/****************************************************************************
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* DecodeBlock: the whole thing
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****************************************************************************/
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static picture_t *DecodeBlock( decoder_t *p_dec, block_t **pp_block )
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{
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decoder_sys_t *p_sys = (decoder_sys_t*) p_dec->p_sys;
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picture_t *p_pic;
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if( pp_block == NULL || !*pp_block ) return NULL;
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p_pic = decoder_NewPicture( p_dec );
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if( p_pic == NULL )
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{
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msg_Err( p_dec, "cannot get picture" );
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goto error;
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}
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if( p_sys->b_reload && (mdate() >= p_sys->i_next) )
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{
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var_TriggerCallback( p_dec, "fake-file" );
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/* next period */
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p_sys->i_next = (mtime_t)(p_sys->i_reload + mdate());
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}
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vlc_mutex_lock( &p_dec->p_sys->lock );
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picture_Copy( p_pic, p_dec->p_sys->p_image );
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vlc_mutex_unlock( &p_dec->p_sys->lock );
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p_pic->date = (*pp_block)->i_pts;
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error:
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block_Release( *pp_block );
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*pp_block = NULL;
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return p_pic;
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}
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/*****************************************************************************
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* CloseDecoder: fake decoder destruction
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*****************************************************************************/
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static void CloseDecoder( vlc_object_t *p_this )
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{
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decoder_t *p_dec = (decoder_t *)p_this;
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picture_t *p_image = p_dec->p_sys->p_image;
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var_DelCallback( p_dec, "fake-file", FakeCallback, p_dec );
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var_DelCallback( p_dec, "fake-file-reload", FakeCallback , p_dec );
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if( p_image != NULL )
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picture_Release( p_image );
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vlc_mutex_destroy( &p_dec->p_sys->lock );
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free( p_dec->p_sys );
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}
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/*****************************************************************************
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* FakeCallback: Image source change callback.
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*****************************************************************************/
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static int FakeCallback( vlc_object_t *p_this, char const *psz_var,
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vlc_value_t oldval, vlc_value_t newval,
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void *p_data )
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{
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VLC_UNUSED(p_this); VLC_UNUSED(oldval);
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decoder_t *p_dec = (decoder_t *)p_data;
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if( !strcmp( psz_var, "fake-file" ) )
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{
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image_handler_t *p_handler;
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picture_t *p_new_image;
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video_format_t fmt_in, fmt_out;
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char *psz_file = newval.psz_string;
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picture_t *p_image;
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vlc_mutex_lock( &p_dec->p_sys->lock );
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p_image = p_dec->p_sys->p_image;
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if( !psz_file || !*psz_file )
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{
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msg_Err( p_dec, "fake-file value must be non empty." );
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vlc_mutex_unlock( &p_dec->p_sys->lock );
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return VLC_EGENERIC;
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}
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msg_Dbg( p_dec, "Changing fake-file to %s.", psz_file );
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memset( &fmt_in, 0, sizeof(fmt_in) );
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fmt_out = p_dec->fmt_out.video;
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p_handler = image_HandlerCreate( p_dec );
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p_new_image = image_ReadUrl( p_handler, psz_file, &fmt_in, &fmt_out );
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image_HandlerDelete( p_handler );
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if( !p_new_image )
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{
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msg_Err( p_dec, "error while reading image (%s)", psz_file );
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vlc_mutex_unlock( &p_dec->p_sys->lock );
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return VLC_EGENERIC;
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}
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p_dec->p_sys->p_image = p_new_image;
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picture_Release( p_image );
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vlc_mutex_unlock( &p_dec->p_sys->lock );
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}
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else if( !strcmp( psz_var, "fake-file-reload" ) )
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{
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if( newval.i_int > 0)
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{
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p_dec->p_sys->b_reload = true;
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p_dec->p_sys->i_reload = (mtime_t)(newval.i_int * 1000000);
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p_dec->p_sys->i_next = (mtime_t)(p_dec->p_sys->i_reload + mdate());
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}
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else
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{
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p_dec->p_sys->b_reload = false;
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}
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}
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return VLC_SUCCESS;
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}
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