cdrom.c

vlc源码

                *pp_sectors = malloc( (i_tracks + 1) * sizeof(int) );
                if( *pp_sectors == NULL )
                    return 0;

                for( i = 0 ; i <= i_tracks ; i++ )
                {
                    (*pp_sectors)[ i ] = MSF_TO_LBA2(
                                           cdrom_toc.TrackData[i].Address[1],
                                           cdrom_toc.TrackData[i].Address[2],
                                           cdrom_toc.TrackData[i].Address[3] );
                    msg_Dbg( p_this, "p_sectors: %i, %i", i, (*pp_sectors)[i]);
                }
            }
        }

#elif defined( HAVE_IOC_TOC_HEADER_IN_SYS_CDIO_H ) \
       || defined( HAVE_SCSIREQ_IN_SYS_SCSIIO_H )
        struct ioc_toc_header tochdr;
        struct ioc_read_toc_entry toc_entries;

        if( ioctl( p_vcddev->i_device_handle, CDIOREADTOCHEADER, &tochdr )
            == -1 )
        {
            msg_Err( p_this, "could not read TOCHDR" );
            return 0;
        }

        i_tracks = tochdr.ending_track - tochdr.starting_track + 1;

        if( pp_sectors )
        {
             int i;

             *pp_sectors = malloc( (i_tracks + 1) * sizeof(int) );
             if( *pp_sectors == NULL )
                 return 0;

             toc_entries.address_format = CD_LBA_FORMAT;
             toc_entries.starting_track = 0;
             toc_entries.data_len = ( i_tracks + 1 ) *
                                        sizeof( struct cd_toc_entry );
             toc_entries.data = (struct cd_toc_entry *)
                                    malloc( toc_entries.data_len );
             if( toc_entries.data == NULL )
             {
                 free( *pp_sectors );
                 return 0;
             }

             /* Read the TOC */
             if( ioctl( p_vcddev->i_device_handle, CDIOREADTOCENTRYS,
                        &toc_entries ) == -1 )
             {
                 msg_Err( p_this, "could not read the TOC" );
                 free( *pp_sectors );
                 free( toc_entries.data );
                 return 0;
             }

             /* Fill the p_sectors structure with the track/sector matches */
             for( i = 0 ; i <= i_tracks ; i++ )
             {
#if defined( HAVE_SCSIREQ_IN_SYS_SCSIIO_H )
                 /* FIXME: is this ok? */
                 (*pp_sectors)[ i ] = toc_entries.data[i].addr.lba;
#else
                 (*pp_sectors)[ i ] = ntohl( toc_entries.data[i].addr.lba );
#endif
             }
        }
#else
        struct cdrom_tochdr   tochdr;
        struct cdrom_tocentry tocent;

        /* First we read the TOC header */
        if( ioctl( p_vcddev->i_device_handle, CDROMREADTOCHDR, &tochdr )
            == -1 )
        {
            msg_Err( p_this, "could not read TOCHDR" );
            return 0;
        }

        i_tracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;

        if( pp_sectors )
        {
            int i;

            *pp_sectors = malloc( (i_tracks + 1) * sizeof(int) );
            if( *pp_sectors == NULL )
                return 0;

            /* Fill the p_sectors structure with the track/sector matches */
            for( i = 0 ; i <= i_tracks ; i++ )
            {
                tocent.cdte_format = CDROM_LBA;
                tocent.cdte_track =
                    ( i == i_tracks ) ? CDROM_LEADOUT : tochdr.cdth_trk0 + i;

                if( ioctl( p_vcddev->i_device_handle, CDROMREADTOCENTRY,
                           &tocent ) == -1 )
                {
                    msg_Err( p_this, "could not read TOCENTRY" );
                    free( *pp_sectors );
                    return 0;
                }

                (*pp_sectors)[ i ] = tocent.cdte_addr.lba;
            }
        }
#endif

        return i_tracks;
    }
}

/****************************************************************************
 * ioctl_ReadSector: Read VCD or CDDA sectors
 ****************************************************************************/
int ioctl_ReadSectors( vlc_object_t *p_this, const vcddev_t *p_vcddev,
                       int i_sector, uint8_t *p_buffer, int i_nb, int i_type )
{
    uint8_t *p_block;
    int i;

    if( i_type == VCD_TYPE ) p_block = malloc( VCD_SECTOR_SIZE * i_nb );
    else p_block = p_buffer;

    if( p_vcddev->i_vcdimage_handle != -1 )
    {
        /*
         *  vcd image mode
         */
        if( lseek( p_vcddev->i_vcdimage_handle, i_sector * VCD_SECTOR_SIZE,
                   SEEK_SET ) == -1 )
        {
            msg_Err( p_this, "Could not lseek to sector %d", i_sector );
            if( i_type == VCD_TYPE ) free( p_block );
            return -1;
        }

        if( read( p_vcddev->i_vcdimage_handle, p_block, VCD_SECTOR_SIZE * i_nb)
            == -1 )
        {
            msg_Err( p_this, "Could not read sector %d", i_sector );
            if( i_type == VCD_TYPE ) free( p_block );
            return -1;
        }

    }
    else
    {

        /*
         *  vcd device mode
         */

#if defined( __APPLE__ )
        dk_cd_read_t cd_read;

        memset( &cd_read, 0, sizeof(cd_read) );

        cd_read.offset = i_sector * VCD_SECTOR_SIZE;
        cd_read.sectorArea = kCDSectorAreaSync | kCDSectorAreaHeader |
                             kCDSectorAreaSubHeader | kCDSectorAreaUser |
                             kCDSectorAreaAuxiliary;
        cd_read.sectorType = kCDSectorTypeUnknown;

        cd_read.buffer = p_block;
        cd_read.bufferLength = VCD_SECTOR_SIZE * i_nb;

        if( ioctl( p_vcddev->i_device_handle, DKIOCCDREAD, &cd_read ) == -1 )
        {
            msg_Err( p_this, "could not read block %d", i_sector );
            if( i_type == VCD_TYPE ) free( p_block );
            return -1;
        }

#elif defined( WIN32 )
        if( p_vcddev->hASPI )
        {
            HANDLE hEvent;
            struct SRB_ExecSCSICmd ssc;

            /* Create the transfer completion event */
            hEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
            if( hEvent == NULL )
            {
                if( i_type == VCD_TYPE ) free( p_block );
                return -1;
            }

            memset( &ssc, 0, sizeof( ssc ) );

            ssc.SRB_Cmd         = SC_EXEC_SCSI_CMD;
            ssc.SRB_Flags       = SRB_DIR_IN | SRB_EVENT_NOTIFY;
            ssc.SRB_HaId        = LOBYTE( p_vcddev->i_sid );
            ssc.SRB_Target      = HIBYTE( p_vcddev->i_sid );
            ssc.SRB_SenseLen    = SENSE_LEN;

            ssc.SRB_PostProc = (LPVOID) hEvent;
            ssc.SRB_CDBLen      = 12;

            /* Operation code */
            ssc.CDBByte[ 0 ] = READ_CD;

            /* Sector type */
            ssc.CDBByte[ 1 ] = i_type == VCD_TYPE ? SECTOR_TYPE_MODE2_FORM2 :
                                                    SECTOR_TYPE_CDDA;

            /* Start of LBA */
            ssc.CDBByte[ 2 ] = ( i_sector >> 24 ) & 0xff;
            ssc.CDBByte[ 3 ] = ( i_sector >> 16 ) & 0xff;
            ssc.CDBByte[ 4 ] = ( i_sector >>  8 ) & 0xff;
            ssc.CDBByte[ 5 ] = ( i_sector       ) & 0xff;

            /* Transfer length */
            ssc.CDBByte[ 6 ] = ( i_nb >> 16 ) & 0xff;
            ssc.CDBByte[ 7 ] = ( i_nb >> 8  ) & 0xff;
            ssc.CDBByte[ 8 ] = ( i_nb       ) & 0xff;

            /* Data selection */
            ssc.CDBByte[ 9 ] = i_type == VCD_TYPE ? READ_CD_RAW_MODE2 :
                                                    READ_CD_USERDATA;

            /* Result buffer */
            ssc.SRB_BufPointer  = p_block;
            ssc.SRB_BufLen = VCD_SECTOR_SIZE * i_nb;

            /* Initiate transfer */
            ResetEvent( hEvent );
            p_vcddev->lpSendCommand( (void*) &ssc );

            /* If the command has still not been processed, wait until it's
             * finished */
            if( ssc.SRB_Status == SS_PENDING )
            {
                WaitForSingleObject( hEvent, INFINITE );
            }
            CloseHandle( hEvent );

            /* check that the transfer went as planned */
            if( ssc.SRB_Status != SS_COMP )
            {
                if( i_type == VCD_TYPE ) free( p_block );
                return -1;
            }
        }
        else
        {
            DWORD dwBytesReturned;
            RAW_READ_INFO cdrom_raw;

            /* Initialize CDROM_RAW_READ structure */
            cdrom_raw.DiskOffset.QuadPart = CD_SECTOR_SIZE * i_sector;
            cdrom_raw.SectorCount = i_nb;
            cdrom_raw.TrackMode =  i_type == VCD_TYPE ? XAForm2 : CDDA;

            if( DeviceIoControl( p_vcddev->h_device_handle,
                                 IOCTL_CDROM_RAW_READ, &cdrom_raw,
                                 sizeof(RAW_READ_INFO), p_block,
                                 VCD_SECTOR_SIZE * i_nb, &dwBytesReturned,
                                 NULL ) == 0 )
            {
                if( i_type == VCD_TYPE )
                {
                    /* Retry in YellowMode2 */
                    cdrom_raw.TrackMode = YellowMode2;
                    if( DeviceIoControl( p_vcddev->h_device_handle,
                                 IOCTL_CDROM_RAW_READ, &cdrom_raw,
                                 sizeof(RAW_READ_INFO), p_block,
                                 VCD_SECTOR_SIZE * i_nb, &dwBytesReturned,
                                 NULL ) == 0 )
                    {
                        free( p_block );
                        return -1;
                    }
                }
                else return -1;
            }
        }

#elif defined( HAVE_SCSIREQ_IN_SYS_SCSIIO_H )
        struct scsireq  sc;
        int i_ret;

        memset( &sc, 0, sizeof(sc) );
        sc.cmd[0] = 0xBE;
        sc.cmd[1] = i_type == VCD_TYPE ? SECTOR_TYPE_MODE2_FORM2:
                                         SECTOR_TYPE_CDDA;
        sc.cmd[2] = (i_sector >> 24) & 0xff;
        sc.cmd[3] = (i_sector >> 16) & 0xff;
        sc.cmd[4] = (i_sector >>  8) & 0xff;
        sc.cmd[5] = (i_sector >>  0) & 0xff;
        sc.cmd[6] = (i_nb >> 16) & 0xff;
        sc.cmd[7] = (i_nb >>  8) & 0xff;
        sc.cmd[8] = (i_nb      ) & 0xff;
        sc.cmd[9] = i_type == VCD_TYPE ? READ_CD_RAW_MODE2 : READ_CD_USERDATA;
        sc.cmd[10] = 0; /* sub channel */
        sc.cmdlen = 12;
        sc.databuf = (caddr_t)p_block;
        sc.datalen = VCD_SECTOR_SIZE * i_nb;
        sc.senselen = sizeof( sc.sense );
        sc.flags = SCCMD_READ;
        sc.timeout = 10000;

        i_ret = ioctl( i_fd, SCIOCCOMMAND, &sc );
        if( i_ret == -1 )
        {
            msg_Err( p_this, "SCIOCCOMMAND failed" );
            if( i_type == VCD_TYPE ) free( p_block );
            return -1;
        }
        if( sc.retsts || sc.error )
        {
            msg_Err( p_this, "SCSI command failed: status %d error %d\n",
                             sc.retsts, sc.error );
            if( i_type == VCD_TYPE ) free( p_block );
           return -1;
        }

#elif defined( HAVE_IOC_TOC_HEADER_IN_SYS_CDIO_H )
        int i_size = VCD_SECTOR_SIZE;

        if( ioctl( p_vcddev->i_device_handle, CDRIOCSETBLOCKSIZE, &i_size )
            == -1 )
        {
            msg_Err( p_this, "Could not set block size" );
            if( i_type == VCD_TYPE ) free( p_block );
            return( -1 );
        }

        if( lseek( p_vcddev->i_device_handle,
                   i_sector * VCD_SECTOR_SIZE, SEEK_SET ) == -1 )
        {
            msg_Err( p_this, "Could not lseek to sector %d", i_sector );
            if( i_type == VCD_TYPE ) free( p_block );
            return( -1 );
        }

        if( read( p_vcddev->i_device_handle,
                  p_block, VCD_SECTOR_SIZE * i_nb ) == -1 )
        {
            msg_Err( p_this, "Could not read sector %d", i_sector );
            if( i_type == VCD_TYPE ) free( p_block );
            return( -1 );
        }

#else
        for( i = 0; i < i_nb; i++ )
        {
            int i_dummy = i_sector + i + 2 * CD_FRAMES;

#define p_msf ((struct cdrom_msf0 *)(p_block + i * VCD_SECTOR_SIZE))
            p_msf->minute =   i_dummy / (CD_FRAMES * CD_SECS);
            p_msf->second = ( i_dummy % (CD_FRAMES * CD_SECS) ) / CD_FRAMES;
            p_msf->frame =  ( i_dummy % (CD_FRAMES * CD_SECS) ) % CD_FRAMES;
#undef p_msf

            if( ioctl( p_vcddev->i_device_handle, CDROMREADRAW,
                       p_block + i * VCD_SECTOR_SIZE ) == -1 )
            {
                msg_Err( p_this, "could not read block %i from disc",
                         i_sector );

                if( i == 0 )
                {
                    if( i_type == VCD_TYPE ) free( p_block );
                    return( -1 );
                }
                else break;
            }
        }
#endif
    }

    /* For VCDs, we don't want to keep the header and footer of the
     * sectors read */
    if( i_type == VCD_TYPE )
    {
        for( i = 0; i < i_nb; i++ )
        {
            memcpy( p_buffer + i * VCD_DATA_SIZE,
                    p_block + i * VCD_SECTOR_SIZE + VCD_DATA_START,
                    VCD_DATA_SIZE );
        }
        free( p_block );
    }

    return( 0 );
}

/****************************************************************************
 * Private functions
 ****************************************************************************/

/****************************************************************************
 * OpenVCDImage: try to open a vcd image from a .cue file
 ****************************************************************************/
static int OpenVCDImage( vlc_object_t * p_this, const char *psz_dev,
                         vcddev_t *p_vcddev )
{
    int i_ret = -1;
    char *p_pos;
    char *psz_vcdfile = NULL;
    char *psz_cuefile = NULL;
    FILE *cuefile     = NULL;
    int *p_sectors    = NULL;
    char line[1024];
    bool b_found      = false;

    /* Check if we are dealing with a .cue file */
    p_pos = strrchr( psz_dev, '.' );