/*****************************************************************************
* input_ts.c: TS demux and netlist management
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
* $Id: input_ts.c,v 1.13 2002/02/15 13:32:53 sam Exp $
*
* Authors: Henri Fallon <henri@videolan.org>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <videolan/vlc.h>
#ifdef STRNCASECMP_IN_STRINGS_H
# include <strings.h>
#endif
#include <sys/types.h>
#if !defined( _MSC_VER )
# include <sys/time.h>
#endif
#ifdef SYS_NTO
# include <sys/select.h>
#endif
#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#if defined( WIN32 )
# include <io.h>
# include <winsock2.h>
#else
# include <sys/uio.h> /* struct iovec */
#endif
#if defined( WIN32 )
# include "input_iovec.h"
#endif
#include "stream_control.h"
#include "input_ext-intf.h"
#include "input_ext-dec.h"
#include "input_ext-plugins.h"
#include "input_ts.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
static int TSProbe ( struct input_thread_s * );
static void TSInit ( struct input_thread_s * );
static void TSEnd ( struct input_thread_s * );
static int TSRead ( struct input_thread_s *, data_packet_t ** );
/*****************************************************************************
* Declare a buffer manager
*****************************************************************************/
#define FLAGS BUFFERS_UNIQUE_SIZE
#define NB_LIFO 1
DECLARE_BUFFERS_EMBEDDED( FLAGS, NB_LIFO );
DECLARE_BUFFERS_INIT( FLAGS, NB_LIFO );
DECLARE_BUFFERS_END( FLAGS, NB_LIFO );
DECLARE_BUFFERS_NEWPACKET( FLAGS, NB_LIFO );
DECLARE_BUFFERS_DELETEPACKET( FLAGS, NB_LIFO, 1000 );
DECLARE_BUFFERS_NEWPES( FLAGS, NB_LIFO );
DECLARE_BUFFERS_DELETEPES( FLAGS, NB_LIFO, 150 );
DECLARE_BUFFERS_TOIO( FLAGS, TS_PACKET_SIZE );
/*****************************************************************************
* Functions exported as capabilities. They are declared as static so that
* we don't pollute the namespace too much.
*****************************************************************************/
void _M( input_getfunctions )( function_list_t * p_function_list )
{
#define input p_function_list->functions.input
input.pf_probe = TSProbe;
input.pf_init = TSInit;
input.pf_open = NULL;
input.pf_close = NULL;
input.pf_end = TSEnd;
input.pf_init_bit_stream = InitBitstream;
input.pf_set_area = NULL;
input.pf_set_program = input_SetProgram;
input.pf_read = TSRead;
input.pf_demux = input_DemuxTS;
input.pf_new_packet = input_NewPacket;
input.pf_new_pes = input_NewPES;
input.pf_delete_packet = input_DeletePacket;
input.pf_delete_pes = input_DeletePES;
input.pf_rewind = NULL;
input.pf_seek = NULL;
#undef input
}
/*****************************************************************************
* TSProbe: verifies that the stream is a TS stream
*****************************************************************************/
static int TSProbe( input_thread_t * p_input )
{
char * psz_name = p_input->p_source;
if( ( strlen(psz_name) >= 10 && !strncasecmp( psz_name, "udpstream:", 10 ) )
|| ( strlen(psz_name) >= 4 && !strncasecmp( psz_name, "udp:", 4 ) ) )
{
/* If the user specified "udp:" then it's probably a network stream */
return 0;
}
if( ( strlen(psz_name) > 5 ) && !strncasecmp( psz_name, "file:", 5 ) )
{
/* If the user specified "file:" then it's probably a file */
psz_name += 5;
}
if( ( strlen(psz_name) > 3 ) &&
!strncasecmp( psz_name+strlen(psz_name)-3, ".ts", 3) )
{
/* If it is a ".ts" file it's probably a TS file ... */
return 0;
}
return -1;
}
/*****************************************************************************
* TSInit: initializes TS structures
*****************************************************************************/
static void TSInit( input_thread_t * p_input )
{
thread_ts_data_t * p_method;
es_descriptor_t * p_pat_es;
es_ts_data_t * p_demux_data;
stream_ts_data_t * p_stream_data;
/* Initialise structure */
p_method = malloc( sizeof( thread_ts_data_t ) );
if( p_method == NULL )
{
intf_ErrMsg( "TS input : Out of memory" );
p_input->b_error = 1;
return;
}
#if defined( WIN32 )
p_method->i_length = 0;
p_method->i_offset = 0;
#endif
p_input->p_plugin_data = (void *)p_method;
p_input->p_method_data = NULL;
if( (p_input->p_method_data = input_BuffersInit()) == NULL )
{
p_input->b_error = 1;
return;
}
/* Initialize the stream */
input_InitStream( p_input, sizeof( stream_ts_data_t ) );
p_input->stream.p_selected_area->i_tell = 0;
/* Init */
p_stream_data = (stream_ts_data_t *)p_input->stream.p_demux_data;
p_stream_data->i_pat_version = PAT_UNINITIALIZED ;
/* We'll have to catch the PAT in order to continue
* Then the input will catch the PMT and then the others ES
* The PAT es is indepedent of any program. */
p_pat_es = input_AddES( p_input, NULL,
0x00, sizeof( es_ts_data_t ) );
p_demux_data=(es_ts_data_t *)p_pat_es->p_demux_data;
p_demux_data->b_psi = 1;
p_demux_data->i_psi_type = PSI_IS_PAT;
p_demux_data->p_psi_section = malloc(sizeof(psi_section_t));
p_demux_data->p_psi_section->b_is_complete = 1;
}
/*****************************************************************************
* TSEnd: frees unused data
*****************************************************************************/
static void TSEnd( input_thread_t * p_input )
{
es_descriptor_t * p_pat_es;
p_pat_es = input_FindES( p_input, 0x00 );
if( p_pat_es != NULL )
input_DelES( p_input, p_pat_es );
free(p_input->p_plugin_data);
input_BuffersEnd( p_input->p_method_data );
}
/*****************************************************************************
* TSRead: reads data packets
*****************************************************************************
* Returns -1 in case of error, 0 in case of EOF, otherwise the number of
* packets.
*****************************************************************************/
static int TSRead( input_thread_t * p_input,
data_packet_t ** pp_data )
{
thread_ts_data_t * p_method;
int i_read = 0, i_loop;
int i_data = 1;
struct iovec p_iovec[TS_READ_ONCE];
data_packet_t * p_data;
struct timeval timeout;
/* Init */
p_method = ( thread_ts_data_t * )p_input->p_plugin_data;
/* Initialize file descriptor set */
FD_ZERO( &(p_method->fds) );
FD_SET( p_input->i_handle, &(p_method->fds) );
/* We'll wait 0.5 second if nothing happens */
timeout.tv_sec = 0;
timeout.tv_usec = 500000;
/* Fill if some data is available */
#if defined( WIN32 )
if ( ! p_input->stream.b_pace_control )
#endif
{
i_data = select( p_input->i_handle + 1, &p_method->fds,
NULL, NULL, &timeout );
}
if( i_data == -1 )
{
intf_ErrMsg( "input error: TS select error (%s)", strerror(errno) );
return( -1 );
}
if( i_data )
{
/* Get iovecs */
*pp_data = p_data = input_BuffersToIO( p_input->p_method_data, p_iovec,
TS_READ_ONCE );
if ( p_data == NULL )
{
return( -1 );
}
#if defined( WIN32 )
if( p_input->stream.b_pace_control )
{
i_read = readv( p_input->i_handle, p_iovec, TS_READ_ONCE );
}
else
{
i_read = readv_network( p_input->i_handle, p_iovec,
TS_READ_ONCE, p_method );
}
#else
i_read = readv( p_input->i_handle, p_iovec, TS_READ_ONCE );
/* Shouldn't happen, but it does - at least under Linux */
if( (i_read == -1) && ( (errno == EAGAIN) || (errno = EWOULDBLOCK) ) )
{
/* just ignore that error */
intf_ErrMsg( "input error: 0 bytes read" );
i_read = 0;
}
#endif
/* Error */
if( i_read == -1 )
{
intf_ErrMsg( "input error: TS readv error" );
p_input->pf_delete_packet( p_input->p_method_data, p_data );
return( -1 );
}
p_input->stream.p_selected_area->i_tell += i_read;
i_read /= TS_PACKET_SIZE;
/* Check correct TS header */
for( i_loop = 0; i_loop < i_read; i_loop++ )
{
if( (*pp_data)->p_demux_start[0] != 0x47 )
{
intf_ErrMsg( "input error: bad TS packet (starts with "
"0x%.2x, should be 0x47)",
p_data->p_demux_start[0] );
}
pp_data = &(*pp_data)->p_next;
}
if( i_read != TS_READ_ONCE )
{
/* Delete remaining packets */
p_input->pf_delete_packet( p_input->p_method_data, *pp_data );
}
}
*pp_data = NULL;
return( i_read );
}