You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.4 KiB
125 lines
3.4 KiB
/*****************************************************************************
|
|
* pes.h: ISO/IEC 13818-1 Packetized Elementary Stream
|
|
*****************************************************************************
|
|
* Copyright (C) 2010 VideoLAN
|
|
* $Id$
|
|
*
|
|
* Authors: Christophe Massiot <massiot@via.ecp.fr>
|
|
*
|
|
* This program is free software. It comes without any warranty, to
|
|
* the extent permitted by applicable law. You can redistribute it
|
|
* and/or modify it under the terms of the Do What The Fuck You Want
|
|
* To Public License, Version 2, as published by Sam Hocevar. See
|
|
* http://sam.zoy.org/wtfpl/COPYING for more details.
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Normative references:
|
|
* - ISO/IEC 13818-1:2007(E) (MPEG-2 systems)
|
|
*/
|
|
|
|
#ifndef __BITSTREAM_MPEG_PES_H__
|
|
#define __BITSTREAM_MPEG_PES_H__
|
|
|
|
#ifdef __cplusplus
|
|
extern "C"
|
|
{
|
|
#endif
|
|
|
|
/*****************************************************************************
|
|
* PES header
|
|
*****************************************************************************/
|
|
#define PES_HEADER_SIZE 6
|
|
#define PES_HEADER_SIZE_NOPTS 9
|
|
#define PES_HEADER_SIZE_PTS 14
|
|
#define PES_HEADER_SIZE_PTSDTS 19
|
|
|
|
#define PES_STREAM_ID_MIN 0xbc
|
|
#define PES_STREAM_ID_PRIVATE_1 0xbd
|
|
#define PES_STREAM_ID_PRIVATE_2 0xbf
|
|
#define PES_STREAM_ID_AUDIO_MPEG 0xc0
|
|
#define PES_STREAM_ID_VIDEO_MPEG 0xe0
|
|
|
|
static inline void pes_init(uint8_t *p_pes)
|
|
{
|
|
p_pes[0] = 0x0;
|
|
p_pes[1] = 0x0;
|
|
p_pes[2] = 0x1;
|
|
p_pes[6] = 0x80;
|
|
p_pes[7] = 0x0;
|
|
p_pes[8] = 0x0;
|
|
}
|
|
|
|
static inline void pes_set_streamid(uint8_t *p_pes, uint8_t i_stream_id)
|
|
{
|
|
p_pes[3] = i_stream_id;
|
|
}
|
|
|
|
static inline void pes_set_length(uint8_t *p_pes, uint16_t i_length)
|
|
{
|
|
p_pes[4] = i_length >> 8;
|
|
p_pes[5] = i_length & 0xff;
|
|
}
|
|
|
|
static inline void pes_set_headerlength(uint8_t *p_pes, uint8_t i_length)
|
|
{
|
|
p_pes[6] = 0x80;
|
|
p_pes[7] = 0x0;
|
|
p_pes[8] = i_length;
|
|
if ( i_length > 0 )
|
|
memset( &p_pes[9], 0xff, i_length ); /* stuffing */
|
|
}
|
|
|
|
static inline uint8_t pes_get_headerlength(const uint8_t *p_pes)
|
|
{
|
|
return p_pes[8];
|
|
}
|
|
|
|
static inline void pes_set_dataalignment(uint8_t *p_pes)
|
|
{
|
|
p_pes[6] |= 0x4;
|
|
}
|
|
|
|
static inline void pes_set_pts(uint8_t *p_pes, uint64_t i_pts)
|
|
{
|
|
p_pes[7] |= 0x80;
|
|
if (p_pes[8] < 5)
|
|
p_pes[8] = 5;
|
|
p_pes[9] = 0x21 | ((i_pts >> 29) & 0xe);
|
|
p_pes[10] = (i_pts >> 22) & 0xff;
|
|
p_pes[11] = 0x1 | ((i_pts >> 14) & 0xfe);
|
|
p_pes[12] = (i_pts >> 7) & 0xff;
|
|
p_pes[13] = 0x1 | ((i_pts << 1) & 0xfe);
|
|
}
|
|
|
|
static inline void pes_set_dts(uint8_t *p_pes, uint64_t i_dts)
|
|
{
|
|
p_pes[7] |= 0x40;
|
|
if (p_pes[8] < 10)
|
|
p_pes[8] = 10;
|
|
p_pes[14] = 0x11 | ((i_dts >> 29) & 0xe);
|
|
p_pes[15] = (i_dts >> 22) & 0xff;
|
|
p_pes[16] = 0x1 | ((i_dts >> 14) & 0xfe);
|
|
p_pes[17] = (i_dts >> 7) & 0xff;
|
|
p_pes[18] = 0x1 | ((i_dts << 1) & 0xfe);
|
|
}
|
|
|
|
static inline bool pes_validate(const uint8_t *p_pes)
|
|
{
|
|
return (p_pes[0] == 0x0 && p_pes[1] == 0x0 && p_pes[2] == 0x1
|
|
&& p_pes[3] >= PES_STREAM_ID_MIN);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* PES payload
|
|
*****************************************************************************/
|
|
static inline uint8_t *pes_payload(uint8_t *p_pes)
|
|
{
|
|
return p_pes + PES_HEADER_SIZE + pes_get_headerlength(p_pes);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|