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multicat.c
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multicat.c
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/*****************************************************************************
* multicat.c: netcat-equivalent for multicast
*****************************************************************************
* Copyright (C) 2009, 2011-2012 VideoLAN
* $Id$
*
* Authors: Christophe Massiot <massiot@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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/* POLLRDHUP */
#define _GNU_SOURCE 1
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdint.h>
#include <stdbool.h>
#include <inttypes.h>
#include <string.h>
#include <errno.h>
#include <signal.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <pthread.h>
#include <poll.h>
#include <sys/ioctl.h>
#ifdef SIOCGSTAMPNS
# define HAVE_TIMESTAMPS
#endif
#ifndef POLLRDHUP
# define POLLRDHUP 0
#endif
#include <bitstream/ietf/rtp.h>
#include <bitstream/mpeg/ts.h>
#include "util.h"
#undef DEBUG_WRITEBACK
#define POLL_TIMEOUT 1000 /* 1 s */
#define MAX_LATENESS INT64_C(27000000) /* 1 s */
#define FILE_FLUSH INT64_C(27000000) /* 1 s */
/*****************************************************************************
* Local declarations
*****************************************************************************/
static int i_input_fd, i_output_fd;
FILE *p_input_aux, *p_output_aux;
static int i_ttl = 0;
static bool b_sleep = true;
static uint16_t i_pcr_pid = 0;
static bool b_overwrite_ssrc = false;
static in_addr_t i_ssrc = 0;
static bool b_input_udp = false, b_output_udp = false;
static size_t i_asked_payload_size = DEFAULT_PAYLOAD_SIZE;
static size_t i_rtp_header_size = RTP_HEADER_SIZE;
static uint64_t i_rotate_size = DEFAULT_ROTATE_SIZE;
struct udprawpkt pktheader;
bool b_raw_packets = false;
static volatile sig_atomic_t b_die = 0;
static uint16_t i_rtp_seqnum;
static uint64_t i_stc = 0; /* system time clock, used for date calculations */
static uint64_t i_first_stc = 0;
static uint64_t i_pcr = 0, i_pcr_stc = 0; /* for RTP/TS output */
uint64_t (*pf_Date)(void) = wall_Date;
void (*pf_Sleep)( uint64_t ) = wall_Sleep;
ssize_t (*pf_Read)( void *p_buf, size_t i_len );
bool (*pf_Delay)(void) = NULL;
void (*pf_ExitRead)(void);
ssize_t (*pf_Write)( const void *p_buf, size_t i_len );
void (*pf_ExitWrite)(void);
static void usage(void)
{
msg_Raw( NULL, "Usage: multicat [-i <RT priority>] [-t <ttl>] [-X] [-T <file name>] [-f] [-p <PCR PID>] [-s <chunks>] [-n <chunks>] [-k <start time>] [-d <duration>] [-a] [-r <file duration>] [-S <SSRC IP>] [-u] [-U] [-m <payload size>] [-R <RTP header size>] [-w] <input item> <output item>" );
msg_Raw( NULL, " item format: <file path | device path | FIFO path | directory path | network host>" );
msg_Raw( NULL, " host format: [<connect addr>[:<connect port>]][@[<bind addr][:<bind port>]]" );
msg_Raw( NULL, " -X: also pass-through all packets to stdout" );
msg_Raw( NULL, " -T: write an XML file with the current characteristics of transmission" );
msg_Raw( NULL, " -f: output packets as fast as possible" );
msg_Raw( NULL, " -p: overwrite or create RTP timestamps using PCR PID (MPEG-2/TS)" );
msg_Raw( NULL, " -s: skip the first N chunks of payload [deprecated]" );
msg_Raw( NULL, " -n: exit after playing N chunks of payload [deprecated]" );
msg_Raw( NULL, " -k: start at the given position (in 27 MHz units, negative = from the end)" );
msg_Raw( NULL, " -d: exit after definite time (in 27 MHz units)" );
msg_Raw( NULL, " -a: append to existing destination file (risky)" );
msg_Raw( NULL, " -r: in directory mode, rotate file after this duration (default: 97200000000 ticks = 1 hour)" );
msg_Raw( NULL, " -S: overwrite or create RTP SSRC" );
msg_Raw( NULL, " -u: source has no RTP header" );
msg_Raw( NULL, " -U: destination has no RTP header" );
msg_Raw( NULL, " -m: size of the payload chunk, excluding optional RTP header (default 1316)" );
msg_Raw( NULL, " -R: size of the optional RTP header (default 12)" );
msg_Raw( NULL, " -w: send with RAW (needed for /srcaddr)" );
exit(EXIT_FAILURE);
}
/*****************************************************************************
* Signal Handler
*****************************************************************************/
static void SigHandler( int i_signal )
{
b_die = 1;
}
/*****************************************************************************
* Poll: factorize polling code
*****************************************************************************/
static bool Poll(void)
{
struct pollfd pfd;
int i_ret;
pfd.fd = i_input_fd;
pfd.events = POLLIN | POLLERR | POLLRDHUP | POLLHUP;
i_ret = poll( &pfd, 1, POLL_TIMEOUT );
if ( i_ret < 0 )
{
msg_Err( NULL, "poll error (%s)", strerror(errno) );
b_die = 1;
return false;
}
if ( pfd.revents & (POLLERR | POLLRDHUP | POLLHUP) )
{
msg_Err( NULL, "poll error" );
b_die = 1;
return false;
}
if ( !i_ret ) return false;
return true;
}
/*****************************************************************************
* tcp_*: TCP socket handlers (only what differs from UDP)
*****************************************************************************/
static uint8_t *p_tcp_buffer = NULL;
static size_t i_tcp_size = 0;
static ssize_t tcp_Read( void *p_buf, size_t i_len )
{
if ( p_tcp_buffer == NULL )
p_tcp_buffer = malloc(i_len);
uint8_t *p_read_buffer;
ssize_t i_read_size = i_len;
p_read_buffer = p_tcp_buffer + i_tcp_size;
i_read_size -= i_tcp_size;
if ( (i_read_size = recv( i_input_fd, p_read_buffer, i_read_size, 0 )) < 0 )
{
msg_Err( NULL, "recv error (%s)", strerror(errno) );
b_die = 1;
return 0;
}
i_tcp_size += i_read_size;
i_stc = pf_Date();
if ( i_tcp_size != i_len )
return 0;
memcpy( p_buf, p_tcp_buffer, i_len );
i_tcp_size = 0;
return i_len;
}
/*****************************************************************************
* udp_*: UDP socket handlers
*****************************************************************************/
static off_t i_udp_nb_skips = 0;
static bool b_tcp = false;
static ssize_t udp_Read( void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( !i_udp_nb_skips && !i_first_stc )
i_first_stc = pf_Date();
if ( !Poll() )
{
i_stc = pf_Date();
return 0;
}
if ( !b_tcp )
{
if ( (i_ret = recv( i_input_fd, p_buf, i_len, 0 )) < 0 )
{
msg_Err( NULL, "recv error (%s)", strerror(errno) );
b_die = 1;
return 0;
}
#ifdef HAVE_TIMESTAMPS
struct timespec ts;
if ( !ioctl( i_input_fd, SIOCGSTAMPNS, &ts ) )
i_stc = ts.tv_sec * UINT64_C(27000000) + ts.tv_nsec * 27 / 1000;
else
#endif
i_stc = pf_Date();
}
else
i_ret = tcp_Read( p_buf, i_len );
if ( i_udp_nb_skips )
{
i_udp_nb_skips--;
return 0;
}
return i_ret;
}
static void udp_ExitRead(void)
{
close( i_input_fd );
if ( p_tcp_buffer != NULL )
free( p_tcp_buffer );
}
static int udp_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_pos || (i_input_fd = OpenSocket( psz_arg, i_ttl, DEFAULT_PORT, 0,
NULL, &b_tcp, NULL )) < 0 )
return -1;
i_udp_nb_skips = i_nb_skipped_chunks;
pf_Read = udp_Read;
pf_ExitRead = udp_ExitRead;
#ifdef HAVE_TIMESTAMPS
if ( !b_tcp )
pf_Date = real_Date;
#endif
return 0;
}
static ssize_t raw_Write( const void *p_buf, size_t i_len )
{
ssize_t i_ret;
struct iovec iov[2];
#ifdef __FAVOR_BSD
pktheader.udph.uh_ulen
#else
pktheader.udph.len
#endif
= htons(sizeof(struct udphdr) + i_len);
iov[0].iov_base = &pktheader;
iov[0].iov_len = sizeof(struct udprawpkt);
iov[1].iov_base = (void *) p_buf;
iov[1].iov_len = i_len;
if ( (i_ret = writev( i_output_fd, iov, 2 )) < 0 )
{
if ( errno == EBADF || errno == ECONNRESET || errno == EPIPE )
{
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = 1;
}
/* otherwise do not set b_die because these errors can be transient */
return 0;
}
return i_ret;
}
/* Please note that the write functions also work for TCP */
static ssize_t udp_Write( const void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( (i_ret = send( i_output_fd, p_buf, i_len, 0 )) < 0 )
{
if ( errno == EBADF || errno == ECONNRESET || errno == EPIPE )
{
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = 1;
}
/* otherwise do not set b_die because these errors can be transient */
return 0;
}
return i_ret;
}
static void udp_ExitWrite(void)
{
close( i_output_fd );
}
static int udp_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
struct opensocket_opt opt;
memset(&opt, 0, sizeof(struct opensocket_opt));
if (b_raw_packets) {
opt.p_raw_pktheader = &pktheader;
}
if ( (i_output_fd = OpenSocket( psz_arg, i_ttl, 0, DEFAULT_PORT,
NULL, NULL, &opt )) < 0 )
return -1;
if (b_raw_packets) {
pf_Write = raw_Write;
} else {
pf_Write = udp_Write;
}
pf_ExitWrite = udp_ExitWrite;
return 0;
}
/*****************************************************************************
* stream_*: FIFO and character device handlers
*****************************************************************************/
static off_t i_stream_nb_skips = 0;
static ssize_t stream_Read( void *p_buf, size_t i_len )
{
ssize_t i_ret;
if ( !i_stream_nb_skips && !i_first_stc )
i_first_stc = pf_Date();
if ( !Poll() )
{
i_stc = pf_Date();
return 0;
}
if ( (i_ret = read( i_input_fd, p_buf, i_len )) < 0 )
{
msg_Err( NULL, "read error (%s)", strerror(errno) );
b_die = 1;
return 0;
}
i_stc = pf_Date();
if ( i_stream_nb_skips )
{
i_stream_nb_skips--;
return 0;
}
return i_ret;
}
static void stream_ExitRead(void)
{
close( i_input_fd );
}
static int stream_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_pos ) return -1;
i_input_fd = OpenFile( psz_arg, true, false );
i_stream_nb_skips = i_nb_skipped_chunks;
pf_Read = stream_Read;
pf_ExitRead = stream_ExitRead;
return 0;
}
static ssize_t stream_Write( const void *p_buf, size_t i_len )
{
ssize_t i_ret;
retry:
if ( (i_ret = write( i_output_fd, p_buf, i_len )) < 0 )
{
if (errno == EAGAIN || errno == EINTR)
goto retry;
msg_Err( NULL, "write error (%s)", strerror(errno) );
b_die = 1;
}
return i_ret;
}
static void stream_ExitWrite(void)
{
close( i_output_fd );
}
static int stream_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
i_output_fd = OpenFile( psz_arg, false, b_append );
pf_Write = stream_Write;
pf_ExitWrite = stream_ExitWrite;
return 0;
}
/*****************************************************************************
* file_*: handler for the auxiliary file format
*****************************************************************************/
static uint64_t i_file_next_flush = 0;
static ssize_t file_Read( void *p_buf, size_t i_len )
{
uint8_t p_aux[8];
ssize_t i_ret;
if ( (i_ret = read( i_input_fd, p_buf, i_len )) < 0 )
{
msg_Err( NULL, "read error (%s)", strerror(errno) );
b_die = 1;
return 0;
}
if ( i_ret == 0 )
{
msg_Dbg( NULL, "end of file reached" );
b_die = 1;
return 0;
}
if ( fread( p_aux, 8, 1, p_input_aux ) != 1 )
{
msg_Warn( NULL, "premature end of aux file reached" );
b_die = 1;
return 0;
}
i_stc = FromSTC( p_aux );
if ( !i_first_stc ) i_first_stc = i_stc;
return i_ret;
}
static bool file_Delay(void)
{
/* for correct throughput without rounding approximations */
static uint64_t i_file_first_stc = 0, i_file_first_wall = 0;
uint64_t i_wall = pf_Date();
if ( !i_file_first_wall )
{
i_file_first_wall = i_wall;
i_file_first_stc = i_stc;
}
else
{
int64_t i_delay = (i_stc - i_file_first_stc) -
(i_wall - i_file_first_wall);
if ( i_delay > 0 )
pf_Sleep( i_delay );
else if ( i_delay < -MAX_LATENESS )
{
msg_Warn( NULL, "too much lateness, resetting clocks" );
i_file_first_wall = i_wall;
i_file_first_stc = i_stc;
}
}
return true;
}
static void file_ExitRead(void)
{
close( i_input_fd );
fclose( p_input_aux );
}
static int file_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
char *psz_aux_file = GetAuxFile( psz_arg, i_len );
if ( i_pos )
{
i_nb_skipped_chunks = LookupAuxFile( psz_aux_file, i_pos, false );
if ( i_nb_skipped_chunks < 0 )
{
free( psz_aux_file );
return -1;
}
}
i_input_fd = OpenFile( psz_arg, true, false );
p_input_aux = OpenAuxFile( psz_aux_file, true, false );
free( psz_aux_file );
lseek( i_input_fd, (off_t)i_len * i_nb_skipped_chunks, SEEK_SET );
fseeko( p_input_aux, 8 * i_nb_skipped_chunks, SEEK_SET );
pf_Read = file_Read;
pf_Delay = file_Delay;
pf_ExitRead = file_ExitRead;
return 0;
}
static ssize_t file_Write( const void *p_buf, size_t i_len )
{
uint8_t p_aux[8];
ssize_t i_ret;
#ifdef DEBUG_WRITEBACK
uint64_t start = pf_Date(), end;
#endif
if ( (i_ret = write( i_output_fd, p_buf, i_len )) < 0 )
{
msg_Err( NULL, "couldn't write to file (%s)", strerror(errno) );
b_die = 1;
return i_ret;
}
#ifdef DEBUG_WRITEBACK
end = pf_Date();
if (end - start > 270000) /* 10 ms */
msg_Err(NULL, "too long waiting in write(%"PRId64")", (end - start) / 27000);
#endif
ToSTC( p_aux, i_stc );
if ( fwrite( p_aux, 8, 1, p_output_aux ) != 1 )
{
msg_Err( NULL, "couldn't write to auxiliary file" );
b_die = 1;
}
if (!i_file_next_flush)
i_file_next_flush = i_stc + FILE_FLUSH;
else if (i_file_next_flush <= i_stc)
{
fflush( p_output_aux );
i_file_next_flush = i_stc + FILE_FLUSH;
}
return i_ret;
}
static void file_ExitWrite(void)
{
close( i_output_fd );
fclose( p_output_aux );
}
static int file_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
char *psz_aux_file = GetAuxFile( psz_arg, i_len );
if ( b_append )
CheckFileSizes( psz_arg, psz_aux_file, i_len );
i_output_fd = OpenFile( psz_arg, false, b_append );
p_output_aux = OpenAuxFile( psz_aux_file, false, b_append );
free( psz_aux_file );
pf_Write = file_Write;
pf_ExitWrite = file_ExitWrite;
return 0;
}
/*****************************************************************************
* dir_*: handler for the auxiliary directory format
*****************************************************************************/
static char *psz_input_dir_name;
static size_t i_input_dir_len;
static uint64_t i_input_dir_file;
static uint64_t i_input_dir_delay;
static ssize_t dir_Read( void *p_buf, size_t i_len )
{
ssize_t i_ret;
try_again:
i_ret = file_Read( p_buf, i_len );
if ( !i_ret )
{
b_die = 0; /* we're not dead yet */
close( i_input_fd );
fclose( p_input_aux );
i_input_fd = 0;
i_input_dir_file++;
i_input_fd = OpenDirFile( psz_input_dir_name, i_input_dir_file,
true, i_input_dir_len, &p_input_aux );
if ( i_input_fd < 0 )
{
msg_Err( NULL, "end of files reached" );
b_die = 1;
return 0;
}
goto try_again;
}
return i_ret;
}
static bool dir_Delay(void)
{
uint64_t i_wall = pf_Date() - i_input_dir_delay;
int64_t i_delay = i_stc - i_wall;
if ( i_delay > 0 )
pf_Sleep( i_delay );
else if ( i_delay < -MAX_LATENESS )
{
msg_Warn( NULL, "dropping late packet" );
return false;
}
return true;
}
static void dir_ExitRead(void)
{
free( psz_input_dir_name );
if ( i_input_fd )
{
close( i_input_fd );
fclose( p_input_aux );
}
}
static int dir_InitRead( const char *psz_arg, size_t i_len,
off_t i_nb_skipped_chunks, int64_t i_pos )
{
if ( i_nb_skipped_chunks )
{
msg_Err( NULL, "unable to skip chunks with directory input" );
return -1;
}
if ( i_pos <= 0 )
i_pos += real_Date();
if ( i_pos <= 0 )
{
msg_Err( NULL, "invalid position" );
return -1;
}
i_first_stc = i_stc = i_pos;
i_input_dir_delay = real_Date() - i_stc;
psz_input_dir_name = strdup( psz_arg );
i_input_dir_len = i_len;
i_input_dir_file = GetDirFile( i_rotate_size, i_pos );
i_nb_skipped_chunks = LookupDirAuxFile( psz_input_dir_name,
i_input_dir_file, i_stc,
i_input_dir_len );
if ( i_nb_skipped_chunks < 0 )
{
/* Try at most one more chunk */
i_input_dir_file++;
i_nb_skipped_chunks = LookupDirAuxFile( psz_input_dir_name,
i_input_dir_file, i_stc,
i_input_dir_len );
if ( i_nb_skipped_chunks < 0 )
{
msg_Err( NULL, "position not found" );
return -1;
}
}
i_input_fd = OpenDirFile( psz_input_dir_name, i_input_dir_file,
true, i_input_dir_len, &p_input_aux );
lseek( i_input_fd, (off_t)i_len * i_nb_skipped_chunks, SEEK_SET );
fseeko( p_input_aux, 8 * i_nb_skipped_chunks, SEEK_SET );
pf_Date = real_Date;
pf_Sleep = real_Sleep;
pf_Read = dir_Read;
pf_Delay = dir_Delay;
pf_ExitRead = dir_ExitRead;
return 0;
}
static char *psz_output_dir_name;
static size_t i_output_dir_len;
static uint64_t i_output_dir_file;
static ssize_t dir_Write( const void *p_buf, size_t i_len )
{
uint64_t i_dir_file = GetDirFile( i_rotate_size, i_stc );
if ( !i_output_fd || i_dir_file != i_output_dir_file )
{
if ( i_output_fd )
{
close( i_output_fd );
fclose( p_output_aux );
}
i_output_dir_file = i_dir_file;
i_output_fd = OpenDirFile( psz_output_dir_name, i_output_dir_file,
false, i_output_dir_len, &p_output_aux );
}
return file_Write( p_buf, i_len );
}
static void dir_ExitWrite(void)
{
free( psz_output_dir_name );
if ( i_output_fd )
{
close( i_output_fd );
fclose( p_output_aux );
}
}
static int dir_InitWrite( const char *psz_arg, size_t i_len, bool b_append )
{
psz_output_dir_name = strdup( psz_arg );
i_output_dir_len = i_len;
i_output_dir_file = 0;
i_output_fd = 0;
pf_Date = real_Date;
pf_Sleep = real_Sleep;
pf_Write = dir_Write;
pf_ExitWrite = dir_ExitWrite;
return 0;
}
/*****************************************************************************
* GetPCR: read PCRs to align RTP timestamps with PCR scale (RFC compliance)
*****************************************************************************/
static void GetPCR( const uint8_t *p_buffer, size_t i_read_size )
{
while ( i_read_size >= TS_SIZE )
{
uint16_t i_pid = ts_get_pid( p_buffer );
if ( !ts_validate( p_buffer ) )
{
msg_Warn( NULL, "invalid TS packet (sync=0x%x)", p_buffer[0] );
return;
}
if ( (i_pid == i_pcr_pid || i_pcr_pid == 8192)
&& ts_has_adaptation(p_buffer) && ts_get_adaptation(p_buffer)
&& tsaf_has_pcr(p_buffer) )
{
i_pcr = tsaf_get_pcr( p_buffer ) * 300 + tsaf_get_pcrext( p_buffer );
i_pcr_stc = i_stc;
}
p_buffer += TS_SIZE;
i_read_size -= TS_SIZE;
}
}
/*****************************************************************************
* Entry point
*****************************************************************************/
int main( int i_argc, char **pp_argv )
{
int i_priority = -1;
bool b_passthrough = false;
int i_stc_fd = -1;
off_t i_skip_chunks = 0, i_nb_chunks = -1;
int64_t i_seek = 0;
uint64_t i_duration = 0;
bool b_append = false;
uint8_t *p_buffer, *p_read_buffer;
size_t i_max_read_size, i_max_write_size;
int c;
struct sigaction sa;
sigset_t set;
/* Parse options */
while ( (c = getopt( i_argc, pp_argv, "i:t:XT:fp:s:n:k:d:ar:S:uUm:R:wh" )) != -1 )
{
switch ( c )
{
case 'i':
i_priority = strtol( optarg, NULL, 0 );
break;
case 't':
i_ttl = strtol( optarg, NULL, 0 );
break;
case 'X':
b_passthrough = true;
break;
case 'T':
i_stc_fd = open( optarg, O_WRONLY | O_CREAT | O_TRUNC, 0644 );
if ( i_stc_fd < 0 )
msg_Warn( NULL, "unable to open %s (%s)\n", optarg,
strerror(errno) );
break;
case 'f':
b_sleep = false;
break;
case 'p':
i_pcr_pid = strtol( optarg, NULL, 0 );
break;
case 's':
i_skip_chunks = strtol( optarg, NULL, 0 );
break;
case 'n':
i_nb_chunks = strtol( optarg, NULL, 0 );
break;
case 'k':
i_seek = strtoull( optarg, NULL, 0 );
break;
case 'd':
i_duration = strtoull( optarg, NULL, 0 );
break;
case 'a':
b_append = true;
break;
case 'r':
i_rotate_size = strtoull( optarg, NULL, 0 );
break;
case 'S':
{
struct in_addr maddr;
if ( !inet_aton( optarg, &maddr ) )
usage();
i_ssrc = maddr.s_addr;
b_overwrite_ssrc = true;
break;
}
case 'u':
b_input_udp = true;
break;
case 'U':
b_output_udp = true;
break;
case 'm':
i_asked_payload_size = strtol( optarg, NULL, 0 );
break;
case 'R':
i_rtp_header_size = strtol( optarg, NULL, 0 );
break;
case 'w':
b_raw_packets = true;
break;
case 'h':
default:
usage();
break;
}
}
if ( optind >= i_argc - 1 )
usage();
/* Open sockets */
if ( udp_InitRead( pp_argv[optind], i_asked_payload_size, i_skip_chunks,
i_seek ) < 0 )
{
int i_ret;
mode_t i_mode = StatFile( pp_argv[optind] );
if ( !i_mode )
{
msg_Err( NULL, "input not found, exiting" );
exit(EXIT_FAILURE);
}
if ( S_ISDIR( i_mode ) )
i_ret = dir_InitRead( pp_argv[optind], i_asked_payload_size,
i_skip_chunks, i_seek );
else if ( S_ISCHR( i_mode ) || S_ISFIFO( i_mode ) )
i_ret = stream_InitRead( pp_argv[optind], i_asked_payload_size,
i_skip_chunks, i_seek );
else
i_ret = file_InitRead( pp_argv[optind], i_asked_payload_size,
i_skip_chunks, i_seek );
if ( i_ret == -1 )
{
msg_Err( NULL, "couldn't open input, exiting" );
exit(EXIT_FAILURE);
}
b_input_udp = true; /* We don't need no, RTP header */
}
optind++;
if ( udp_InitWrite( pp_argv[optind], i_asked_payload_size, b_append ) < 0 )
{
int i_ret;
mode_t i_mode = StatFile( pp_argv[optind] );
if ( S_ISDIR( i_mode ) )
i_ret = dir_InitWrite( pp_argv[optind], i_asked_payload_size,
b_append );
else if ( S_ISCHR( i_mode ) || S_ISFIFO( i_mode ) )
i_ret = stream_InitWrite( pp_argv[optind], i_asked_payload_size,
b_append );
else
i_ret = file_InitWrite( pp_argv[optind], i_asked_payload_size,
b_append );
if ( i_ret == -1 )
{
msg_Err( NULL, "couldn't open output, exiting" );
exit(EXIT_FAILURE);
}
b_output_udp = true; /* We don't need no, RTP header */
}
optind++;
srand( time(NULL) * getpid() );
i_max_read_size = i_asked_payload_size + (b_input_udp ? 0 :
i_rtp_header_size);
i_max_write_size = i_asked_payload_size + (b_output_udp ? 0 :
(b_input_udp ? RTP_HEADER_SIZE :
i_rtp_header_size));
p_buffer = malloc( (i_max_read_size > i_max_write_size) ? i_max_read_size :
i_max_write_size );
p_read_buffer = p_buffer + ((b_input_udp && !b_output_udp) ?
RTP_HEADER_SIZE : 0);
if ( b_input_udp && !b_output_udp )
i_rtp_seqnum = rand() & 0xffff;
/* Real-time priority */
if ( i_priority > 0 )
{
struct sched_param param;
int i_error;
memset( ¶m, 0, sizeof(struct sched_param) );
param.sched_priority = i_priority;
if ( (i_error = pthread_setschedparam( pthread_self(), SCHED_RR,
¶m )) )
{
msg_Warn( NULL, "couldn't set thread priority: %s",
strerror(i_error) );
}
}
/* Set signal handlers */
memset( &sa, 0, sizeof(struct sigaction) );
sa.sa_handler = SigHandler;
sigfillset( &set );
if ( sigaction( SIGTERM, &sa, NULL ) == -1 ||
sigaction( SIGHUP, &sa, NULL ) == -1 ||
sigaction( SIGINT, &sa, NULL ) == -1 ||
sigaction( SIGPIPE, &sa, NULL ) == -1 )
{
msg_Err( NULL, "couldn't set signal handler: %s", strerror(errno) );
exit(EXIT_FAILURE);
}
/* Main loop */
while ( !b_die )
{
ssize_t i_read_size = pf_Read( p_read_buffer, i_max_read_size );
uint8_t *p_payload;
size_t i_payload_size;
uint8_t *p_write_buffer;
size_t i_write_size;
if ( i_duration && i_stc > i_first_stc + i_duration )
break;
if ( i_read_size <= 0 ) continue;
if ( b_sleep && pf_Delay != NULL)
if (!pf_Delay())
goto dropped_packet;
/* Determine start and size of payload */
if ( !b_input_udp )
{
if ( !rtp_check_hdr( p_read_buffer ) )
msg_Warn( NULL, "invalid RTP packet received" );
p_payload = rtp_payload( p_read_buffer );
i_payload_size = p_read_buffer + i_read_size - p_payload;
}
else
{
p_payload = p_read_buffer;
i_payload_size = i_read_size;
}
/* Pad to get the asked payload size */
while ( i_payload_size + TS_SIZE <= i_asked_payload_size )
{
ts_pad( &p_payload[i_payload_size] );
i_read_size += TS_SIZE;