/* This is broken reading more than 2Gb at a time is ssize_t is 32-bit. */
ssize_t DVDReadBlocks( dvd_file_t *dvd_file, int offset,
size_t block_count, unsigned char *data )
{
int ret;
/* Check arguments. */
if( dvd_file == NULL || offset < 0 || data == NULL )
return -1;
/* Hack, and it will still fail for multiple opens in a threaded app ! */
if( dvd_file->dvd->css_title != dvd_file->css_title ) {
dvd_file->dvd->css_title = dvd_file->css_title;
if( dvd_file->dvd->isImageFile ) {
dvdinput_title( dvd_file->dvd->dev, (int)dvd_file->lb_start );
}
/* Here each vobu has it's own dvdcss handle, so no need to update
else {
dvdinput_title( dvd_file->title_devs[ 0 ], (int)dvd_file->lb_start );
}*/
}
if( dvd_file->dvd->isImageFile ) {
ret = DVDReadBlocksUDF( dvd_file, (uint32_t)offset,
block_count, data, DVDINPUT_READ_DECRYPT );
} else {
ret = DVDReadBlocksPath( dvd_file, (unsigned int)offset,
block_count, data, DVDINPUT_READ_DECRYPT );
}
return (ssize_t)ret;
}
int DVDReadBytes( dvd_file_t *dvd_file, void *data, int byte_size )
{
unsigned char *secbuf;
unsigned int numsec, seek_sector, seek_byte;
int ret;
/* Check arguments. */
if( dvd_file == NULL || data == NULL )
return -1;
seek_sector = dvd_file->seek_pos / DVD_VIDEO_LB_LEN;
seek_byte = dvd_file->seek_pos % DVD_VIDEO_LB_LEN;
numsec = ( ( seek_byte + byte_size ) / DVD_VIDEO_LB_LEN ) +
( ( ( seek_byte + byte_size ) % DVD_VIDEO_LB_LEN ) ? 1 : 0 );
secbuf = (unsigned char *) malloc( numsec * DVD_VIDEO_LB_LEN );
if( !secbuf ) {
//fprintf( stderr, "libdvdread: Can't allocate memory "
// "for file read!\n" );
return 0;
}
ret = DVDReadBlocksUDF( dvd_file, seek_sector, numsec, secbuf, 0 );
if( ret != (int) numsec ) {
free( secbuf );
return ret < 0 ? ret : 0;
}
memcpy( data, &(secbuf[ seek_byte ]), byte_size );
free( secbuf );
dvd_file->seek_pos += byte_size;
return byte_size;
}
ssize_t DVDReadBytes( dvd_file_t *dvd_file, void *data, size_t byte_size )
{
unsigned char *secbuf_start;
unsigned char *secbuf; //must be aligned to 2048-bytes for raw/O_DIRECT
unsigned int numsec, seek_sector, seek_byte;
int ret;
/* Check arguments. */
if( dvd_file == NULL || data == NULL ) {
errno = EINVAL;
return -1;
}
seek_sector = dvd_file->seek_pos / DVD_VIDEO_LB_LEN;
seek_byte = dvd_file->seek_pos % DVD_VIDEO_LB_LEN;
numsec = ( ( seek_byte + byte_size ) / DVD_VIDEO_LB_LEN ) +
( ( ( seek_byte + byte_size ) % DVD_VIDEO_LB_LEN ) ? 1 : 0 );
/* must align to 2048 bytes if we are reading from raw/O_DIRECT */
secbuf_start = (unsigned char *) malloc( (numsec+1) * DVD_VIDEO_LB_LEN );
if( !secbuf_start ) {
/* errno will be set to ENOMEM by malloc */
return -1;
}
secbuf = DVD_ALIGN(secbuf_start);
if( dvd_file->dvd->isImageFile ) {
ret = DVDReadBlocksUDF( dvd_file, (uint32_t) seek_sector,
(size_t) numsec, secbuf, DVDINPUT_NOFLAGS );
} else {
ret = DVDReadBlocksPath( dvd_file, seek_sector,
(size_t) numsec, secbuf, DVDINPUT_NOFLAGS );
}
if( ret != (int) numsec ) {
free( secbuf_start );
return ret < 0 ? ret : 0;
}
memcpy( data, &(secbuf[ seek_byte ]), byte_size );
free( secbuf_start );
dvd_file->seek_pos += byte_size;
return byte_size;
}
/* This is broken reading more than 2Gb at a time is ssize_t is 32-bit. */
int DVDReadBlocks( dvd_file_t *dvd_file, int offset,
size_t block_count, unsigned char *data )
{
/* Check arguments. */
if( dvd_file == NULL || offset < 0 || data == NULL )
return -1;
/* Hack, and it will still fail for multiple opens in a threaded app ! */
if( dvd_file->dvd->css_title != dvd_file->css_title ) {
dvd_file->dvd->css_title = dvd_file->css_title;
/* Here each vobu has it's own dvdcss handle, so no need to update
else {
dvdinput_title( dvd_file->title_devs[ 0 ], (int)dvd_file->lb_start );
}*/
}
return DVDReadBlocksUDF( dvd_file, (unsigned int)offset, block_count, data, 1 );
}
ssize_t DVDReadBytes( dvd_file_t *dvd_file, void *data, size_t byte_size )
{
unsigned char *secbuf_base, *secbuf;
unsigned int numsec, seek_sector, seek_byte;
int ret;
/* Check arguments. */
if( dvd_file == NULL || data == NULL || (ssize_t)byte_size < 0 )
return -1;
seek_sector = dvd_file->seek_pos / DVD_VIDEO_LB_LEN;
seek_byte = dvd_file->seek_pos % DVD_VIDEO_LB_LEN;
numsec = ( ( seek_byte + byte_size ) / DVD_VIDEO_LB_LEN ) +
( ( ( seek_byte + byte_size ) % DVD_VIDEO_LB_LEN ) ? 1 : 0 );
secbuf_base = malloc( numsec * DVD_VIDEO_LB_LEN + 2048 );
if( !secbuf_base ) {
fprintf( stderr, "libdvdread: Can't allocate memory "
"for file read!\n" );
return 0;
}
secbuf = (unsigned char *)(((uintptr_t)secbuf_base & ~((uintptr_t)2047)) + 2048);
if( dvd_file->dvd->isImageFile ) {
ret = DVDReadBlocksUDF( dvd_file, (uint32_t) seek_sector,
(size_t) numsec, secbuf, DVDINPUT_NOFLAGS );
} else {
ret = DVDReadBlocksPath( dvd_file, seek_sector,
(size_t) numsec, secbuf, DVDINPUT_NOFLAGS );
}
if( ret != (int) numsec ) {
free( secbuf_base );
return ret < 0 ? ret : 0;
}
memcpy( data, &(secbuf[ seek_byte ]), byte_size );
free( secbuf_base );
DVDFileSeekForce(dvd_file, dvd_file->seek_pos + byte_size, -1);
return byte_size;
}
