* -dvd_udf to find files
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
- * $Id: input_dvd.c,v 1.19 2001/02/22 08:44:45 stef Exp $
+ * $Id: input_dvd.c,v 1.20 2001/02/22 08:59:54 stef Exp $
*
* Author: Stéphane Borel <stef@via.ecp.fr>
*
static int DVDRead( input_thread_t * p_input,
data_packet_t ** pp_packets )
{
- byte_t p_header[6];
- data_packet_t * p_data;
- size_t i_packet_size;
- int i_packet, i_error;
- thread_dvd_data_t * p_method;
+ thread_dvd_data_t * p_method;
+ netlist_t * p_netlist;
+ struct iovec * p_vec;
+ struct data_packet_s * p_data;
+ u8 * pi_cur;
+ int i_packet_size;
+ int i_packet;
+ int i_pos;
+ int i;
+ boolean_t b_first_packet;
+
+ p_method = ( thread_dvd_data_t * ) p_input->p_plugin_data;
+ p_netlist = ( netlist_t * ) p_input->p_method_data;
+
+ /* Get an iovec pointer */
+ if( ( p_vec = input_NetlistGetiovec( p_netlist ) ) == NULL )
+ {
+ intf_ErrMsg( "DVD: read error" );
+ return -1;
+ }
- p_method = (thread_dvd_data_t *)p_input->p_plugin_data;
+ /* Reads from DVD */
+ readv( p_input->i_handle, p_vec, p_method->i_read_once );
- memset( pp_packets, 0, INPUT_READ_ONCE * sizeof(data_packet_t *) );
- for( i_packet = 0; i_packet < INPUT_READ_ONCE; i_packet++ )
+ if( p_method->b_encrypted )
{
- /* Read what we believe to be a packet header. */
- if( (i_error = SafeRead( p_input, p_header, 6 )) )
+ for( i=0 ; i<p_method->i_read_once ; i++ )
{
- return( i_error );
+ CSSDescrambleSector( p_method->css.pi_title_key,
+ p_vec[i].iov_base );
+ ((u8*)(p_vec[i].iov_base))[0x14] &= 0x8F;
}
+ }
- if( (U32_AT(p_header) & 0xFFFFFF00) != 0x100L )
- {
- /* This is not the startcode of a packet. Read the stream
- * until we find one. */
- u32 i_startcode = U32_AT(p_header);
- int i_nb;
- byte_t i_dummy;
+ /* Update netlist indexes */
+ input_NetlistMviovec( p_netlist, p_method->i_read_once, &p_data );
- if( i_startcode )
+ i_packet = 0;
+ /* Read headers to compute payload length */
+ for( i = 0 ; i < p_method->i_read_once ; i++ )
+ {
+ i_pos = 0;
+ b_first_packet = 1;
+ while( i_pos < p_netlist->i_buffer_size )
+ {
+ pi_cur = (u8*)(p_vec[i].iov_base + i_pos);
+ /*default header */
+ if( U32_AT( pi_cur ) != 0x1BA )
{
- /* It is common for MPEG-1 streams to pad with zeros
- * (although it is forbidden by the recommendation), so
- * don't bother everybody in this case. */
- intf_WarnMsg( 1, "Garbage at input (%x)", i_startcode );
+ /* That's the case for all packets, except pack header. */
+ i_packet_size = U16_AT( pi_cur + 4 );
}
-
- while( (i_startcode & 0xFFFFFF00) != 0x100L )
+ else
{
- i_startcode <<= 8;
- if( (i_nb = SafeRead( p_input, &i_dummy, 1 )) != 0 )
+ /* Pack header. */
+ if( ( pi_cur[4] & 0xC0 ) == 0x40 )
+ {
+ /* MPEG-2 */
+ i_packet_size = 8;
+ }
+ else if( ( pi_cur[4] & 0xF0 ) == 0x20 )
{
- i_startcode |= i_dummy;
+ /* MPEG-1 */
+ i_packet_size = 6;
}
else
{
- return( 1 );
+ intf_ErrMsg( "Unable to determine stream type" );
+ return( -1 );
}
}
-
- /* Packet found. */
- *(u32 *)p_header = U32_AT(&i_startcode);
- if( (i_error = SafeRead( p_input, p_header + 4, 2 )) )
- {
- return( i_error );
- }
- }
-
- if( U32_AT(p_header) != 0x1BA )
- {
- /* That's the case for all packets, except pack header. */
- i_packet_size = U16_AT(&p_header[4]);
- }
- else
- {
- /* Pack header. */
- if( (p_header[4] & 0xC0) == 0x40 )
- {
- /* MPEG-2 */
- i_packet_size = 8;
- }
- else if( (p_header[4] & 0xF0) == 0x20 )
+ if( b_first_packet )
{
- /* MPEG-1 */
- i_packet_size = 6;
+ p_data->b_discard_payload = 0;
+ b_first_packet = 0;
}
else
- {
- intf_ErrMsg( "Unable to determine stream type" );
- return( -1 );
+ {
+ p_data = input_NetlistNewPacket( p_netlist ,
+ i_packet_size + 6 );
+ memcpy( p_data->p_buffer,
+ p_vec[i].iov_base + i_pos , i_packet_size + 6 );
}
- }
-
- /* Fetch a packet of the appropriate size. */
- if( (p_data = NewPacket( p_input, i_packet_size + 6 )) == NULL )
- {
- intf_ErrMsg( "Out of memory" );
- return( -1 );
- }
- /* Copy the header we already read. */
- memcpy( p_data->p_buffer, p_header, 6 );
-
- /* Read the remaining of the packet. */
- if( i_packet_size && (i_error =
- SafeRead( p_input, p_data->p_buffer + 6, i_packet_size )) )
- {
- return( i_error );
- }
-
- /* In MPEG-2 pack headers we still have to read stuffing bytes. */
- if( U32_AT(p_header) == 0x1BA )
- {
- if( i_packet_size == 8 && (p_data->p_buffer[13] & 0x7) != 0 )
- {
- /* MPEG-2 stuffing bytes */
- byte_t p_garbage[8];
- if( (i_error = SafeRead( p_input, p_garbage,
- p_data->p_buffer[13] & 0x7)) )
- {
- return( i_error );
- }
- }
+ p_data->p_payload_end = p_data->p_payload_start + i_packet_size + 6;
+ pp_packets[i_packet] = p_data;
+ i_packet++;
+ i_pos += i_packet_size + 6;
}
-
- /* Give the packet to the other input stages. */
- pp_packets[i_packet] = p_data;
}
+ pp_packets[i_packet] = NULL;
+
+ vlc_mutex_lock( &p_input->stream.stream_lock );
+ p_input->stream.p_selected_area->i_tell +=
+ p_method->i_read_once *DVD_LB_SIZE;
+ vlc_mutex_unlock( &p_input->stream.stream_lock );
return( 0 );
}
return;
}
+
+
+
projects / vlc / commitdiff