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316 lines
10 KiB
316 lines
10 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 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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*
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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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#include <vlc/vlc.h>
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#include <vlc/decoder.h>
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#include "vlc_image.h"
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#include "vlc_filter.h"
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#include "charset.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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/*****************************************************************************
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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 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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static char *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( _("Fake") );
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set_description( _("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, VLC_FALSE );
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add_integer( "fake-width", 0, NULL, WIDTH_TEXT,
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WIDTH_LONGTEXT, VLC_TRUE );
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add_integer( "fake-height", 0, NULL, HEIGHT_TEXT,
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HEIGHT_LONGTEXT, VLC_TRUE );
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add_bool( "fake-keep-ar", 0, NULL, KEEP_AR_TEXT, KEEP_AR_LONGTEXT,
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VLC_TRUE );
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add_string( "fake-aspect-ratio", "", NULL,
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ASPECT_RATIO_TEXT, ASPECT_RATIO_LONGTEXT, VLC_TRUE );
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add_bool( "fake-deinterlace", 0, NULL, DEINTERLACE_TEXT,
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DEINTERLACE_LONGTEXT, VLC_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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VLC_FALSE );
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change_string_list( ppsz_deinterlace_type, 0, 0 );
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vlc_module_end();
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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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vlc_value_t val;
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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_local;
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vlc_bool_t b_keep_ar;
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int i_aspect = 0;
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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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var_Create( p_dec, "fake-file", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
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var_Get( p_dec, "fake-file", &val );
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if( val.psz_string == NULL || !*val.psz_string )
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{
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if( val.psz_string ) free( val.psz_string );
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msg_Err( p_dec, "specify a file with --fake-file=..." );
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return VLC_EGENERIC;
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}
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psz_file = val.psz_string;
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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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fmt_out.i_chroma = VLC_FOURCC('I','4','2','0');
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var_Create( p_dec, "fake-keep-ar", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
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var_Get( p_dec, "fake-keep-ar", &val );
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b_keep_ar = val.b_bool;
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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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var_Create( p_dec, "fake-aspect-ratio",
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VLC_VAR_STRING | VLC_VAR_DOINHERIT );
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var_Get( p_dec, "fake-aspect-ratio", &val );
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if ( val.psz_string )
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{
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char *psz_parser = strchr( val.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( val.psz_string )
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* VOUT_ASPECT_FACTOR / atoi( psz_parser );
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}
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free( val.psz_string );
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}
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if ( !b_keep_ar )
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{
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var_Get( p_dec, "fake-width", &val );
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fmt_out.i_width = val.i_int;
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var_Get( p_dec, "fake-height", &val );
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fmt_out.i_height = val.i_int;
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}
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p_handler = image_HandlerCreate( p_dec );
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psz_local = ToLocale( psz_file );
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p_image = image_ReadUrl( p_handler, psz_local, &fmt_in, &fmt_out );
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LocaleFree( psz_local );
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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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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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if ( psz_file ) 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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var_Get( p_dec, "fake-width", &val );
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i_width = val.i_int;
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var_Get( p_dec, "fake-height", &val );
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i_height = val.i_int;
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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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p_old->pf_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_aspect = i_aspect;
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}
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else
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{
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fmt_out.i_aspect = fmt_out.i_width
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* VOUT_ASPECT_FACTOR / fmt_out.i_height;
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}
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var_Create( p_dec, "fake-deinterlace", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
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var_Get( p_dec, "fake-deinterlace", &val );
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if ( val.b_bool )
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{
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picture_t *p_old = p_image;
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var_Create( p_dec, "fake-deinterlace-module",
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VLC_VAR_STRING | VLC_VAR_DOINHERIT );
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var_Get( p_dec, "fake-deinterlace-module", &val );
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p_handler = image_HandlerCreate( p_dec );
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p_image = image_Filter( p_handler, p_old, &fmt_out, val.psz_string );
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image_HandlerDelete( p_handler );
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if ( val.psz_string != NULL ) free( val.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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p_old->pf_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 = VLC_FOURCC('I','4','2','0');
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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 = (decoder_sys_t *)p_image;
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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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picture_t *p_image = (picture_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 = p_dec->pf_vout_buffer_new( 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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vout_CopyPicture( p_dec, p_pic, p_image );
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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 = (picture_t *)p_dec->p_sys;
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if( p_image != NULL )
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p_image->pf_release( p_image );
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}
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