demux.c
上传用户:riyaled888
上传日期:2009-03-27
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文件大小:6k
- /*****************************************************************************
- * demux.c: demux functions for dvdplay.
- *****************************************************************************
- * Copyright (C) 1998-2001 VideoLAN
- * $Id: demux.c 7936 2004-06-07 18:32:12Z fenrir $
- *
- * Author: St閜hane Borel <stef@via.ecp.fr>
- *
- * 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, USA.
- *****************************************************************************/
- /*****************************************************************************
- * Preamble
- *****************************************************************************/
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <vlc/vlc.h>
- #include <vlc/input.h>
- #include <vlc/intf.h>
- #include "../../demux/mpeg/system.h"
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #include <fcntl.h>
- #include <sys/types.h>
- #include <sys/stat.h>
- #include <string.h>
- #include <errno.h>
- #ifdef STRNCASECMP_IN_STRINGS_H
- # include <strings.h>
- #endif
- #include "vcd.h"
- #include "vcdplayer.h"
- #include "intf.h"
- /* how many packets vcdx_Demux will read in each loop */
- /* #define vcdplay_READ_ONCE 64 */
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- static int Demux ( input_thread_t * );
- /*****************************************************************************
- * Private structure
- *****************************************************************************/
- struct demux_sys_t
- {
- vcd_data_t * p_vcd;
- module_t * p_module;
- mpeg_demux_t mpeg;
- };
- /*****************************************************************************
- * InitVCD: initializes structures
- *****************************************************************************/
- int E_(InitVCD) ( vlc_object_t *p_this )
- {
- input_thread_t *p_input = (input_thread_t *)p_this;
- vcd_data_t * p_vcd = (vcd_data_t *)p_input->p_access_data;
- demux_sys_t * p_demux;
- printf("++++ InitVCD CALLEDn");
-
- if( p_input->stream.i_method != INPUT_METHOD_VCD )
- {
- return VLC_EGENERIC;
- }
- p_demux = p_input->p_demux_data = malloc( sizeof(demux_sys_t ) );
- if( p_demux == NULL )
- {
- return VLC_ENOMOD;
- }
- p_input->p_private = (void*)&p_demux->mpeg;
- p_demux->p_module = module_Need( p_input, "mpeg-system", NULL, 0 );
- if( p_demux->p_module == NULL )
- {
- free( p_input->p_demux_data );
- return VLC_ENOMOD;
- }
- p_input->p_demux_data->p_vcd = p_vcd;
- p_input->pf_demux = Demux;
- p_input->pf_demux_control = demux_vaControlDefault;
- p_input->pf_rewind = NULL;
- p_vcd->p_intf = NULL;
- p_vcd->i_still_time = 0;
- return VLC_SUCCESS;
- }
- /*****************************************************************************
- * EndVCD: frees unused data
- *****************************************************************************/
- void E_(EndVCD) ( vlc_object_t *p_this )
- {
- input_thread_t *p_input = (input_thread_t *)p_this;
- vcd_data_t * p_vcd = p_input->p_demux_data->p_vcd;
- intf_thread_t * p_intf = NULL;
- p_intf = vlc_object_find( p_input, VLC_OBJECT_INTF, FIND_CHILD );
- if( p_intf != NULL )
- {
- intf_StopThread( p_intf );
- vlc_object_detach( p_intf );
- vlc_object_release( p_intf );
- intf_Destroy( p_intf );
- }
- p_vcd->p_intf = NULL;
- module_Unneed( p_input, p_input->p_demux_data->p_module );
- free( p_input->p_demux_data );
- }
- /*****************************************************************************
- * Demux
- *****************************************************************************/
- static int Demux( input_thread_t * p_input )
- {
- vcd_data_t * p_vcd;
- data_packet_t * p_data;
- ssize_t i_result;
- ptrdiff_t i_remains;
- int i_data_nb = 0;
- p_vcd = p_input->p_demux_data->p_vcd;
- /* Read headers to compute payload length */
- do
- {
- i_result = p_input->p_demux_data->mpeg.pf_read_ps( p_input, &p_data );
- if( i_result <= 0 )
- {
- return i_result;
- }
- i_remains = p_input->p_last_data - p_input->p_current_data;
- p_input->p_demux_data->mpeg.pf_demux_ps( p_input, p_data );
- ++i_data_nb;
- }
- while( i_remains );
- // if( p_vcd->b_still && p_vcd->b_end_of_cell && p_vcd->p_intf != NULL )
- if( p_vcd->i_still_time && p_vcd->b_end_of_cell && p_vcd->p_intf != NULL )
- {
- pgrm_descriptor_t * p_pgrm;
- /* when we receive still_time flag, we have to pause immediately */
- var_SetInteger( p_input, "state", PAUSE_S );
- vcdIntfStillTime( p_vcd->p_intf, p_vcd->i_still_time );
- p_vcd->i_still_time = 0;
- vlc_mutex_lock( &p_input->stream.stream_lock );
- p_pgrm = p_input->stream.p_selected_program;
- p_pgrm->i_synchro_state = SYNCHRO_REINIT;
- vlc_mutex_unlock( &p_input->stream.stream_lock );
- input_ClockManageControl( p_input, p_pgrm, 0 );
- }
- return i_data_nb;
- }