1 /*****************************************************************************
2 * input_ts.h: structures of the input not exported to other modules
3 *****************************************************************************
4 * Copyright (C) 1999, 2000 VideoLAN
5 * $Id: input_ts.h,v 1.9 2001/06/21 07:22:03 sam Exp $
7 * Authors: Henri Fallon <henri@via.ecp.fr>
8 * Boris Dorès <babal@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
23 *****************************************************************************/
28 #define BUFFER_SIZE (7 * TS_PACKET_SIZE)
30 /*****************************************************************************
31 * thread_ts_data_t: private input data
32 *****************************************************************************/
33 typedef struct thread_ts_data_s
35 /* The file descriptor we select() on */
39 char p_buffer[ BUFFER_SIZE ]; /* temporary buffer for readv_network */
40 int i_length; /* length of the UDP packet */
41 int i_offset; /* number of bytes already read from the buffer */
46 /*****************************************************************************
47 * readv_*: readv() replacements for iovec-impaired C libraries
48 *****************************************************************************/
51 static __inline__ int readv_file( int i_fd, struct iovec *p_iovec, int i_count )
53 int i_index, i_len, i_total = 0;
56 for( i_index = i_count; i_index; i_index-- )
58 register signed int i_bytes;
60 i_len = p_iovec->iov_len;
61 p_base = p_iovec->iov_base;
63 /* Loop is unrolled one time to spare the (i_bytes <= 0) test */
67 i_bytes = read( i_fd, p_base, i_len );
69 if( ( i_total == 0 ) && ( i_bytes < 0 ) )
79 i_len -= i_bytes; i_total += i_bytes; p_base += i_bytes;
83 i_bytes = read( i_fd, p_base, i_len );
90 i_len -= i_bytes; i_total += i_bytes; p_base += i_bytes;
100 static __inline__ int read_network( int i_fd, char * p_base,
101 thread_ts_data_t *p_sys, int i_len )
105 if( p_sys->i_offset >= p_sys->i_length )
107 p_sys->i_length = recv( i_fd, p_sys->p_buffer, BUFFER_SIZE, 0 );
108 if ( p_sys->i_length == SOCKET_ERROR )
115 if( i_len <= p_sys->i_length - p_sys->i_offset )
121 i_bytes = p_sys->i_length - p_sys->i_offset;
124 memcpy( p_base, p_sys->p_buffer + p_sys->i_offset, i_bytes );
125 p_sys->i_offset += i_bytes;
130 static __inline__ int readv_network( int i_fd, struct iovec *p_iovec,
131 int i_count, thread_ts_data_t *p_sys )
133 int i_index, i_len, i_total = 0;
136 for( i_index = i_count; i_index; i_index-- )
138 register signed int i_bytes;
140 i_len = p_iovec->iov_len;
141 p_base = p_iovec->iov_base;
143 /* Loop is unrolled one time to spare the (i_bytes <= 0) test */
146 i_bytes = read_network( i_fd, p_base, p_sys, i_len );
148 if( ( i_total == 0 ) && ( i_bytes < 0 ) )
158 i_len -= i_bytes; i_total += i_bytes; p_base += i_bytes;
162 i_bytes = read_network( i_fd, p_base, p_sys, i_len );
169 i_len -= i_bytes; i_total += i_bytes; p_base += i_bytes;