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/*****************************************************************************
* tsutil.c
*****************************************************************************
* Copyright (C) 2001-2005, 2015 VLC authors and VideoLAN
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <vlc_common.h>
#include <vlc_block.h>
#include "tsutil.h"
void PEStoTS( void *p_opaque, PEStoTSCallback pf_callback, block_t *p_pes,
uint16_t i_pid, bool *pb_discontinuity, uint8_t *pi_continuity_counter )
{
/* get PES total size */
uint8_t *p_data = p_pes->p_buffer;
int i_size = p_pes->i_buffer;
bool b_new_pes = true;
for (;;)
{
/* write header
* 8b 0x47 sync byte
* 1b transport_error_indicator
* 1b payload_unit_start
* 1b transport_priority
* 13b pid
* 2b transport_scrambling_control
* 2b if adaptation_field 0x03 else 0x01
* 4b continuity_counter
*/
int i_copy = __MIN( i_size, 184 );
bool b_adaptation_field = i_size < 184;
block_t *p_ts = block_Alloc( 188 );
p_ts->p_buffer[0] = 0x47;
p_ts->p_buffer[1] = ( b_new_pes ? 0x40 : 0x00 )|
( ( i_pid >> 8 )&0x1f );
p_ts->p_buffer[2] = i_pid & 0xff;
p_ts->p_buffer[3] = ( b_adaptation_field ? 0x30 : 0x10 )|
*pi_continuity_counter;
b_new_pes = false;
*pi_continuity_counter = (*pi_continuity_counter+1)%16;
if( b_adaptation_field )
{
int i_stuffing = 184 - i_copy;
p_ts->p_buffer[4] = i_stuffing - 1;
if( i_stuffing > 1 )
{
p_ts->p_buffer[5] = 0x00;
if( *pb_discontinuity )
{
p_ts->p_buffer[5] |= 0x80;
*pb_discontinuity = false;
}
for (int i = 6; i < 6 + i_stuffing - 2; i++ )
{
p_ts->p_buffer[i] = 0xff;
}
}
}
/* copy payload */
memcpy( &p_ts->p_buffer[188 - i_copy], p_data, i_copy );
p_data += i_copy;
i_size -= i_copy;
pf_callback( p_opaque, p_ts );
if( i_size <= 0 )
{
block_t *p_next = p_pes->p_next;
p_pes->p_next = NULL;
block_Release( p_pes );
if( p_next == NULL )
return;
b_new_pes = true;
p_pes = p_next;
i_size = p_pes->i_buffer;
p_data = p_pes->p_buffer;
}
}
}
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