-/****************************************************************************
- * input_vcd.c: VideoCD raw reading plugin.
- *****************************************************************************
- * Copyright (C) 1998-2001 VideoLAN
- *
- * Author: Johan Bilien <jobi@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 <vlc/vlc.h>
-#include <vlc/input.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>
-
-#if defined( WIN32 )
-# include <io.h> /* read() */
-#else
-# include <sys/uio.h> /* struct iovec */
-#endif
-
-#if defined( WIN32 )
-# include "input_iovec.h"
-#endif
-
-#include "input_vcd.h"
-#include "cdrom_tools.h"
-
-/* how many blocks VCDRead will read in each loop */
-#define VCD_BLOCKS_ONCE 20
-#define VCD_DATA_ONCE (VCD_BLOCKS_ONCE * VCD_DATA_SIZE)
-
-/*****************************************************************************
- * Local prototypes
- *****************************************************************************/
-/* called from outside */
-
-static int VCDOpen ( input_thread_t *);
-static void VCDClose ( input_thread_t *);
-static int VCDRead ( input_thread_t *, byte_t *, size_t );
-static void VCDSeek ( input_thread_t *, off_t );
-static int VCDSetArea ( input_thread_t *, input_area_t * );
-static int VCDSetProgram ( input_thread_t *, pgrm_descriptor_t * );
-
-/*****************************************************************************
- * Functions exported as capabilities. They are declared as static so that
- * we don't pollute the namespace too much.
- *****************************************************************************/
-void _M( access_getfunctions )( function_list_t * p_function_list )
-{
-#define access p_function_list->functions.access
- access.pf_open = VCDOpen;
- access.pf_close = VCDClose;
- access.pf_read = VCDRead;
- access.pf_set_area = VCDSetArea;
- access.pf_set_program = VCDSetProgram;
- access.pf_seek = VCDSeek;
-#undef access
-}
-
-/*
- * Data reading functions
- */
-
-/*****************************************************************************
- * VCDOpen: open vcd
- *****************************************************************************/
-static int VCDOpen( input_thread_t *p_input )
-{
- char * psz_orig;
- char * psz_parser;
- char * psz_source;
- char * psz_next;
- struct stat stat_info;
- thread_vcd_data_t * p_vcd;
- int i;
- input_area_t * p_area;
- int i_title = 1;
- int i_chapter = 1;
-
-
-
- /* parse the options passed in command line : */
- psz_orig = psz_parser = psz_source = strdup( p_input->psz_name );
-
- if( !psz_orig )
- {
- return( -1 );
- }
-
- while( *psz_parser && *psz_parser != '@' )
- {
- psz_parser++;
- }
-
- if( *psz_parser == '@' )
- {
- /* Found options */
- *psz_parser = '\0';
- ++psz_parser;
-
- i_title = (int)strtol( psz_parser, &psz_next, 10 );
- if( *psz_next )
- {
- psz_parser = psz_next + 1;
- i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
- }
-
- i_title = i_title ? i_title : 1;
- i_chapter = i_chapter ? i_chapter : 1;
- }
-
- if( !*psz_source )
- {
- if( !p_input->psz_access )
- {
- free( psz_orig );
- return -1;
- }
- psz_source = config_GetPsz( p_input, "vcd" );
- }
-
- /* test the type of file given */
-
- if( stat( psz_source, &stat_info ) == -1 )
- {
- msg_Err( p_input, "cannot stat() source `%s' (%s)",
- psz_source, strerror(errno));
- return( -1 );
- }
-
- if( !S_ISBLK(stat_info.st_mode) && !S_ISCHR(stat_info.st_mode))
- {
- msg_Warn( p_input, "vcd module discarded (not a valid drive)" );
- return -1;
- }
-
-
- p_vcd = malloc( sizeof(thread_vcd_data_t) );
-
- if( p_vcd == NULL )
- {
- msg_Err( p_input, "out of memory" );
- return -1;
- }
-
- p_input->p_access_data = (void *)p_vcd;
-
- p_input->i_mtu = VCD_DATA_ONCE;
-
- vlc_mutex_lock( &p_input->stream.stream_lock );
-
- p_input->stream.b_pace_control = 1;
-
- p_input->stream.b_seekable = 1;
- p_input->stream.p_selected_area->i_size = 0;
- p_input->stream.p_selected_area->i_tell = 0;
-
- vlc_mutex_unlock( &p_input->stream.stream_lock );
-
- p_vcd->i_handle = open( psz_source, O_RDONLY | O_NONBLOCK );
-
- if( p_vcd->i_handle == -1 )
- {
- msg_Err( p_input, "could not open %s\n", psz_source );
- free (p_vcd);
- return -1;
- }
-
- /* We read the Table Of Content information */
- p_vcd->nb_tracks = ioctl_GetTrackCount( p_vcd->i_handle,
- psz_source );
- if( p_vcd->nb_tracks < 0 )
- {
- msg_Err( p_input, "unable to count tracks" );
- close( p_vcd->i_handle );
- free( p_vcd );
- return -1;
- }
- else if( p_vcd->nb_tracks <= 1 )
- {
- msg_Err( p_input, "no movie tracks found" );
- close( p_vcd->i_handle );
- free( p_vcd );
- return -1;
- }
-
- p_vcd->p_sectors = ioctl_GetSectors( p_vcd->i_handle,
- psz_source );
- if( p_vcd->p_sectors == NULL )
- {
- input_BuffersEnd( p_input, p_input->p_method_data );
- close( p_vcd->i_handle );
- free( p_vcd );
- return -1;
- }
-
- /* Set stream and area data */
- vlc_mutex_lock( &p_input->stream.stream_lock );
-
- /* Initialize ES structures */
- input_InitStream( p_input, sizeof( stream_ps_data_t ) );
-
- /* disc input method */
- p_input->stream.i_method = INPUT_METHOD_VCD;
-
-#define area p_input->stream.pp_areas
- for( i = 1 ; i <= p_vcd->nb_tracks - 1 ; i++ )
- {
- input_AddArea( p_input );
-
- /* Titles are Program Chains */
- area[i]->i_id = i;
-
- /* Absolute start offset and size */
- area[i]->i_start = (off_t)p_vcd->p_sectors[i] * (off_t)VCD_DATA_SIZE;
- area[i]->i_size = (off_t)(p_vcd->p_sectors[i+1] - p_vcd->p_sectors[i])
- * (off_t)VCD_DATA_SIZE;
-
- /* Number of chapters */
- area[i]->i_part_nb = 0; // will be the entry points
- area[i]->i_part = 1;
-
- area[i]->i_plugin_data = p_vcd->p_sectors[i];
- }
-#undef area
-
- p_area = p_input->stream.pp_areas[i_title];
-
- VCDSetArea( p_input, p_area );
-
- vlc_mutex_unlock( &p_input->stream.stream_lock );
-
- p_input->psz_demux = "ps";
-
- return 0;
-}
-
-/*****************************************************************************
- * VCDClose: closes vcd
- *****************************************************************************/
-static void VCDClose( input_thread_t *p_input )
-{
- thread_vcd_data_t *p_vcd = (thread_vcd_data_t *)p_input->p_access_data;
-
- close( p_vcd->i_handle );
- free( p_vcd );
-}
-
-/*****************************************************************************
- * VCDRead: reads from the VCD into PES packets.
- *****************************************************************************
- * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
- * bytes.
- *****************************************************************************/
-static int VCDRead( input_thread_t * p_input, byte_t * p_buffer,
- size_t i_len )
-{
- thread_vcd_data_t * p_vcd;
- int i_blocks;
- int i_index;
- int i_read;
- byte_t p_last_sector[ VCD_DATA_SIZE ];
-
- p_vcd = (thread_vcd_data_t *)p_input->p_access_data;
-
- i_read = 0;
-
- /* Compute the number of blocks we have to read */
-
- i_blocks = i_len / VCD_DATA_SIZE;
-
- for ( i_index = 0 ; i_index < i_blocks ; i_index++ )
- {
- if ( ioctl_ReadSector( p_vcd->i_handle, p_vcd->i_sector,
- p_buffer + i_index * VCD_DATA_SIZE ) < 0 )
- {
- msg_Err( p_input, "could not read sector %d", p_vcd->i_sector );
- return -1;
- }
-
- p_vcd->i_sector ++;
- if ( p_vcd->i_sector == p_vcd->p_sectors[p_vcd->i_track + 1] )
- {
- input_area_t *p_area;
-
- if ( p_vcd->i_track >= p_vcd->nb_tracks - 1 )
- return 0; /* EOF */
-
- p_area = p_input->stream.pp_areas[
- p_input->stream.p_selected_area->i_id + 1 ];
-
- msg_Dbg( p_input, "new title" );
-
- p_area->i_part = 1;
- VCDSetArea( p_input, p_area );
-
- }
- i_read += VCD_DATA_SIZE;
- }
-
- if ( i_len % VCD_DATA_SIZE ) /* this should not happen */
- {
- if ( ioctl_ReadSector( p_vcd->i_handle, p_vcd->i_sector,
- p_last_sector ) < 0 )
- {
- msg_Err( p_input, "could not read sector %d", p_vcd->i_sector );
- return -1;
- }
-
- p_input->p_vlc->pf_memcpy( p_buffer + i_blocks * VCD_DATA_SIZE,
- p_last_sector, i_len % VCD_DATA_SIZE );
- i_read += i_len % VCD_DATA_SIZE;
- }
-
- p_input->stream.p_selected_area->i_tell =
- (off_t)p_vcd->i_sector * (off_t)VCD_DATA_SIZE
- - p_input->stream.p_selected_area->i_start;
-
- return i_read;
-}
-
-
-/*****************************************************************************
- * VCDSetProgram: Does nothing since a VCD is mono_program
- *****************************************************************************/
-static int VCDSetProgram( input_thread_t * p_input,
- pgrm_descriptor_t * p_program)
-{
- return 0;
-}
-
-
-/*****************************************************************************
- * VCDSetArea: initialize input data for title x, chapter y.
- * It should be called for each user navigation request.
- ****************************************************************************/
-static int VCDSetArea( input_thread_t * p_input, input_area_t * p_area )
-{
- thread_vcd_data_t * p_vcd;
-
- p_vcd = (thread_vcd_data_t*)p_input->p_access_data;
-
- /* we can't use the interface slider until initilization is complete */
- p_input->stream.b_seekable = 0;
-
- if( p_area != p_input->stream.p_selected_area )
- {
- /* Reset the Chapter position of the current title */
- p_input->stream.p_selected_area->i_part = 1;
- p_input->stream.p_selected_area->i_tell = 0;
-
- /* Change the default area */
- p_input->stream.p_selected_area = p_area;
-
- /* Change the current track */
- /* The first track is not a valid one */
- p_vcd->i_track = p_area->i_id;
- p_vcd->i_sector = p_vcd->p_sectors[p_vcd->i_track];
- }
-
- /* warn interface that something has changed */
- p_input->stream.b_seekable = 1;
- p_input->stream.b_changed = 1;
-
- return 0;
-}
-
-
-/****************************************************************************
- * VCDSeek
- ****************************************************************************/
-static void VCDSeek( input_thread_t * p_input, off_t i_off )
-{
- thread_vcd_data_t * p_vcd;
-
- p_vcd = (thread_vcd_data_t *) p_input->p_access_data;
-
- p_vcd->i_sector = p_vcd->p_sectors[p_vcd->i_track]
- + i_off / (off_t)VCD_DATA_SIZE;
-
- p_input->stream.p_selected_area->i_tell =
- (off_t)p_vcd->i_sector * (off_t)VCD_DATA_SIZE
- - p_input->stream.p_selected_area->i_start;
-}
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