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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Stream definitions for MPEG
*
* Copyright (c) 2007 Michael Sevakis
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef MPEG_STREAM_H
#define MPEG_STREAM_H
/* Codes for various header byte sequences - MSB represents lowest memory
address */
#define PACKET_START_CODE_PREFIX 0x00000100ul
#define END_CODE 0x000001b9ul
#define PACK_START_CODE 0x000001baul
#define SYSTEM_HEADER_START_CODE 0x000001bbul
/* p = base pointer, b0 - b4 = byte offsets from p */
/* We only care about the MS 32 bits of the 33 and so the ticks are 45kHz */
#define TS_FROM_HEADER(p, b0) \
((uint32_t)((((p)[(b0)+0] & 0x0e) << 28) | \
(((p)[(b0)+1] ) << 21) | \
(((p)[(b0)+2] & 0xfe) << 13) | \
(((p)[(b0)+3] ) << 6) | \
(((p)[(b0)+4] ) >> 2)))
#define TS_CHECK_MARKERS(p, b0) \
(((((p)[(b0)+0] & 0x01) << 2) | \
(((p)[(b0)+2] & 0x01) << 1) | \
(((p)[(b0)+4] & 0x01) )) == 0x07)
/* Get the SCR in our 45kHz ticks. Ignore the 9-bit extension */
#define MPEG2_PACK_HEADER_SCR(p, b0) \
((uint32_t)((((p)[(b0)+0] & 0x38) << 26) | \
(((p)[(b0)+0] & 0x03) << 27) | \
(((p)[(b0)+1] ) << 19) | \
(((p)[(b0)+2] & 0xf8) << 11) | \
(((p)[(b0)+2] & 0x03) << 12) | \
(((p)[(b0)+3] ) << 4) | \
(((p)[(b0)+4] ) >> 4)))
#define MPEG2_CHECK_PACK_SCR_MARKERS(ph, b0) \
(((((ph)[(b0)+0] & 0x04) ) | \
(((ph)[(b0)+2] & 0x04) >> 1) | \
(((ph)[(b0)+4] & 0x04) >> 2)) == 0x07)
#define INVALID_TIMESTAMP (~(uint32_t)0)
#define MAX_TIMESTAMP (INVALID_TIMESTAMP-1)
#define TS_SECOND (45000) /* Timestamp ticks per second */
#define TC_SECOND (27000000) /* MPEG timecode ticks per second */
/* These values immediately follow the start code prefix '00 00 01' */
/* Video start codes */
#define MPEG_START_PICTURE 0x00
#define MPEG_START_SLICE_FIRST 0x01
#define MPEG_START_SLICE_LAST 0xaf
#define MPEG_START_RESERVED_1 0xb0
#define MPEG_START_RESERVED_2 0xb1
#define MPEG_START_USER_DATA 0xb2
#define MPEG_START_SEQUENCE_HEADER 0xb3
#define MPEG_START_SEQUENCE_ERROR 0xb4
#define MPEG_START_EXTENSION 0xb5
#define MPEG_START_RESERVED_3 0xb6
#define MPEG_START_SEQUENCE_END 0xb7
#define MPEG_START_GOP 0xb8
/* Stream IDs */
#define MPEG_STREAM_PROGRAM_END 0xb9
#define MPEG_STREAM_PACK_HEADER 0xba
#define MPEG_STREAM_SYSTEM_HEADER 0xbb
#define MPEG_STREAM_PROGRAM_STREAM_MAP 0xbc
#define MPEG_STREAM_PRIVATE_1 0xbd
#define MPEG_STREAM_PADDING 0xbe
#define MPEG_STREAM_PRIVATE_2 0xbf
#define MPEG_STREAM_AUDIO_FIRST 0xc0
#define MPEG_STREAM_AUDIO_LAST 0xcf
#define MPEG_STREAM_VIDEO_FIRST 0xe0
#define MPEG_STREAM_VIDEO_LAST 0xef
#define MPEG_STREAM_ECM 0xf0
#define MPEG_STREAM_EMM 0xf1
/* ITU-T Rec. H.222.0 | ISO/IEC 13818-1 Annex A or
* ISO/IEC 13818-6_DSMCC_stream */
#define MPEG_STREAM_MISC_1 0xf2
/* ISO/IEC_13522_stream */
#define MPEG_STREAM_MISC_2 0xf3
/* ITU-T Rec. H.222.1 type A - E */
#define MPEG_STREAM_MISC_3 0xf4
#define MPEG_STREAM_MISC_4 0xf5
#define MPEG_STREAM_MISC_5 0xf6
#define MPEG_STREAM_MISC_6 0xf7
#define MPEG_STREAM_MISC_7 0xf8
#define MPEG_STREAM_ANCILLARY 0xf9
#define MPEG_STREAM_RESERVED_FIRST 0xfa
#define MPEG_STREAM_RESERVED_LAST 0xfe
/* Program stream directory */
#define MPEG_STREAM_PROGRAM_DIRECTORY 0xff
#define STREAM_IS_AUDIO(s) (((s) & 0xf0) == 0xc0)
#define STREAM_IS_VIDEO(s) (((s) & 0xf0) == 0xe0)
#define MPEG_MAX_PACKET_SIZE (64*1024+16)
/* Largest MPEG audio frame - MPEG1, Layer II, 384kbps, 32kHz, pad */
#define MPA_MAX_FRAME_SIZE 1729
#endif /* MPEG_STREAM_H */
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