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https://code.videolan.org/videolan/vlc
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724461bdf2
There will be some regressions, I used automatic sed replacement with manual checks but there was a lot to change. It's only the first pass.
163 lines
5.5 KiB
C
163 lines
5.5 KiB
C
/*****************************************************************************
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* cdg.c : cdg file demux module for vlc
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*****************************************************************************
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* Copyright (C) 2007 Laurent Aimar
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* $Id$
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*
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* Authors: Laurent Aimar <fenrir # 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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#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_demux.h>
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#include <vlc_codecs.h>
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/*****************************************************************************
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* Module descriptor
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*****************************************************************************/
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static int Open ( vlc_object_t * );
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static void Close( vlc_object_t * );
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vlc_module_begin ()
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set_description( N_("CDG demuxer") )
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set_category( CAT_INPUT )
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set_subcategory( SUBCAT_INPUT_DEMUX )
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set_capability( "demux", 3 )
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set_callbacks( Open, Close )
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add_shortcut( "cdg" )
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add_shortcut( "subtitle" )
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vlc_module_end ()
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/*****************************************************************************
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* Local prototypes
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*****************************************************************************/
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static int Demux ( demux_t * );
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static int Control( demux_t *, int i_query, va_list args );
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struct demux_sys_t
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{
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es_format_t fmt;
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es_out_id_t *p_es;
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date_t pts;
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};
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#define CDG_FRAME_SIZE (96)
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#define CDG_FRAME_RATE (75)
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/*****************************************************************************
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* Open: check file and initializes structures
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*****************************************************************************/
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static int Open( vlc_object_t * p_this )
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{
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demux_t *p_demux = (demux_t*)p_this;
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demux_sys_t *p_sys;
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/* Identify cdg file by extension, as there is no simple way to
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* detect it */
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if( !demux_IsPathExtension( p_demux, ".cdg" ) && !demux_IsForced( p_demux, "cdg" ) )
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return VLC_EGENERIC;
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/* CDG file size has to be multiple of CDG_FRAME_SIZE (it works even
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* if size is unknown ie 0) */
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// if( (stream_Size( p_demux->s ) % CDG_FRAME_SIZE) != 0 )
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// {
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// msg_Err( p_demux, "Reject CDG file based on its size" );
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// return VLC_EGENERIC;
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// }
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p_demux->pf_demux = Demux;
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p_demux->pf_control = Control;
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p_demux->p_sys = p_sys = malloc( sizeof( demux_sys_t ) );
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/* */
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es_format_Init( &p_sys->fmt, VIDEO_ES, VLC_CODEC_CDG );
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p_sys->fmt.video.i_width = 300-2*6;
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p_sys->fmt.video.i_height = 216-2*12 ;
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p_sys->p_es = es_out_Add( p_demux->out, &p_sys->fmt );
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/* There is CDG_FRAME_RATE frames per second */
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date_Init( &p_sys->pts, CDG_FRAME_RATE, 1 );
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date_Set( &p_sys->pts, 1 );
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return VLC_SUCCESS;
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}
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/*****************************************************************************
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* Demux: read packet and send them to decoders
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*****************************************************************************
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* Returns -1 in case of error, 0 in case of EOF, 1 otherwise
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*****************************************************************************/
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static int Demux( demux_t *p_demux )
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{
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demux_sys_t *p_sys = p_demux->p_sys;
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block_t *p_block;
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p_block = stream_Block( p_demux->s, CDG_FRAME_SIZE );
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if( p_block == NULL )
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{
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msg_Dbg( p_demux, "cannot read data, eof" );
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return 0;
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}
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p_block->i_dts =
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p_block->i_pts = date_Increment( &p_sys->pts, 1 );
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es_out_Control( p_demux->out, ES_OUT_SET_PCR, p_block->i_pts );
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es_out_Send( p_demux->out, p_sys->p_es, p_block );
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return 1;
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}
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/*****************************************************************************
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* Close: frees unused data
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*****************************************************************************/
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static void Close ( vlc_object_t * p_this )
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{
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demux_t *p_demux = (demux_t *)p_this;
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demux_sys_t *p_sys = p_demux->p_sys;
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free( p_sys );
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}
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/*****************************************************************************
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* Control:
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*****************************************************************************/
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static int Control( demux_t *p_demux, int i_query, va_list args )
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{
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int i_ret = demux_vaControlHelper( p_demux->s, 0, -1,
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8*CDG_FRAME_SIZE*CDG_FRAME_RATE, CDG_FRAME_SIZE,
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i_query, args );
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if( !i_ret && ( i_query == DEMUX_SET_POSITION || i_query == DEMUX_SET_TIME ) )
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date_Set( &p_demux->p_sys->pts,
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stream_Tell( p_demux->s ) / CDG_FRAME_SIZE *
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INT64_C(1000000) / CDG_FRAME_RATE );
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return i_ret;
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}
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