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/*
#
# MPEG2 data structures for MPEG2Parser class
#
# $Id: mpeg2structs.h,v 1.2 2003/11/01 08:35:37 knup Exp $
#
# Copyright (C) 2001-2003 Kees Cook
# kees@outflux.net, http://outflux.net/
#
# 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 02111-1307, USA.
# http://www.gnu.org/copyleft/gpl.html
#
*/
#ifndef _MPEG2STRUCTS_H_
#define _MPEG2STRUCTS_H_
#ifndef TRUE
# define TRUE 1
#endif
#ifndef FALSE
# define FALSE 0
#endif
/*
This problem with these damn compilers is that I can't
specify an arbitrary bit layout structure. It always
grows to a different size. If someone know how to portably
control that problem let me know, and I can stop using bit masks
to get at my data. :)
*/
#define PICTURE_CODING_MASK 0x38
#define PICTURE_CODING_SHIFT 0x03
#define PICTURE_CODING_INTRA 0x01
#define PICTURE_CODING_PREDICTIVE 0x02
#define PICTURE_CODING_BIDIRECTIONAL 0x03
typedef struct {
uint8_t start_code[4];
uint8_t bits[2];
/* only stuff I want to get to is picture_coding_type
uint16_t temporal_reference:10;
uint8_t picture_coding_type:3;
*/
} picture_header;
#define GOP_FLAG_MASK 0x60
#define GOP_FLAG_CLOSED 0x40
#define GOP_FLAG_BROKEN 0x20
typedef struct {
uint8_t start_code[4];
uint8_t bits[4];
/*
uint32_t time_code:25;
uint8_t closed_gop:1;
uint8_t broken_link:1;
uint8_t unknown:5;
*/
} group_of_pictures_header;
#define ES_TYPE_WEIRD 0
#define ES_TYPE_VIDEO 1
#define ES_TYPE_AUDIO 2
typedef struct {
uint8_t start_code[3];
uint8_t stream_id;
uint8_t PES_packet_length[2];
} PES_packet_header_t;
typedef struct {
uint8_t bits[2];
/*
uint8_t marker0:2; // 10
uint8_t PES_scrambling_control:2;
uint8_t PES_priority:1;
uint8_t data_alignment_indicator:1;
uint8_t copyright:1;
uint8_t original_or_copy:1;
uint8_t PTS_DTS_flags:2;
uint8_t ESCR_flag:1;
uint8_t ES_rate_flag:1;
uint8_t DSM_trick_mode_flag:1;
uint8_t additional_copy_info_flag:1;
uint8_t PES_CRC_flag:1;
uint8_t PES_extension_flag:1;
*/
uint8_t PES_header_data_length;
} PES_packet_internals_t;
typedef struct {
uint8_t marker_bit:1;
uint8_t data:7;
} PES_packet_additional_copy_info_t;
#define GET_BITS(byte,mask,shiftdown) (((byte)&(mask))>>(shiftdown))
#define PPE_PES_private_data_flag(x) GET_BITS(x,0x80,7)
#define PPE_pack_header_field_flag(x) GET_BITS(x,0x40,6)
#define PPE_program_packet_sequence_counter_flag(x) GET_BITS(x,0x20,5)
#define PPE_P_STD_buffer_flag(x) GET_BITS(x,0x10,5)
#define PPE_PES_extension_flag_2(x) GET_BITS(x,0x01,0)
typedef struct {
uint8_t bits[1];
/*
uint8_t PES_private_data_flag:1;
uint8_t pack_header_field_flag:1;
uint8_t program_packet_sequence_counter_flag:1;
uint8_t P_STD_buffer_flag:1;
uint8_t reserved:3;
uint8_t PES_extension_flag_2:1;
*/
} PES_packet_extension_t;
typedef struct {
uint8_t marker0:1;
uint8_t program_packet_sequence_counter:7;
uint8_t marker1:1;
uint8_t MPEG1_MPEG2_identifier:1;
uint8_t original_stuff_length:6;
} PES_packet_extension_program_packet_sequence_counter_t;
#define PES_TYPE_picture_start 0x00
// slice start: 0x01 - 0xAF
// reserved: 0xB0 - 0xB1
#define PES_TYPE_user_data_start 0xB2
#define PES_TYPE_sequence_header 0xB3
#define PES_TYPE_sequence_error 0xB4
#define PES_TYPE_extension_start 0xB5
// reserved: 0xB6
#define PES_TYPE_sequence_end 0xB7
#define PES_TYPE_group_start 0xB8
#define PES_TYPE_program_end 0xB9
#define PES_TYPE_pack_start 0xBA
#define PES_TYPE_system_header 0xBB
#define PES_TYPE_program_stream_map 0xBC /* PES simple */
#define PES_TYPE_private_stream_1 0xBD /* PES complex */
#define PES_TYPE_padding_stream 0xBE /* PES simple */
#define PES_TYPE_private_stream_2 0xBF /* PES simple */
#define PES_TYPE_ECM_stream 0xF0 /* PES simple */
#define PES_TYPE_EMM_stream 0xF1 /* PES simple */
#define PES_TYPE_DSMCC_stream 0xF2 /* PES simple */
#define PES_TYPE_ISO_13522 0xF3 /* PES complex */
#define PES_TYPE_H2221A 0xF4 /* PES complex */
#define PES_TYPE_H2221B 0xF5 /* PES complex */
#define PES_TYPE_H2221C 0xF6 /* PES complex */
#define PES_TYPE_H2221D 0xF7 /* PES complex */
#define PES_TYPE_H2221E 0xF8 /* PES simple */
#define PES_TYPE_ancillary_stream 0xF9 /* PES complex */
// reserved: 0xFA - 0xFE /* PES complex */
#define PES_TYPE_program_stream_directory 0xFF /* PES simple */
#define PES_TYPE_audio 0xC0 /* PES complex */
#define PES_TYPE_MASK_audio 0xE0
#define PES_TYPE_video 0xE0 /* PES complex */
#define PES_TYPE_MASK_video 0xF0
// xxxxx xxxxx
// subtitles: 0x20..0x3F 00100000..00111111
#define DVD_AUDIO_TYPE_sub 0x20
#define DVD_AUDIO_TYPE_MASK_sub 0xE0
// xxxxx xxxxx
// AC3: 0x80..0x9F 10000000..10011111
#define DVD_AUDIO_TYPE_ac3 0x80
#define DVD_AUDIO_TYPE_MASK_ac3 0xE0
// xxxxx xxxxx
// PCM: 0xA0..0xBF 10100000..10111111
#define DVD_AUDIO_TYPE_pcm 0xA0
#define DVD_AUDIO_TYPE_MASK_pcm 0xE0
typedef struct {
uint8_t start_code[4];
uint16_t header_length;
uint8_t bits[6];
/*
uint32_t marker0:1; // 1
uint32_t rate_bound:22;
uint32_t marker1:1; // 1
uint32_t audio_bound:6;
uint32_t fixed_flag:1;
uint32_t CSPS_flag:1;
uint8_t system_audio_lock_flag:1;
uint8_t system_video_lock_flag:1;
uint8_t marker2:1; // 1
uint8_t video_bound:5;
uint8_t packet_rate_restriction_flag:1;
uint8_t reserved:7;
*/
} system_header_t;
typedef struct {
uint8_t stream_id;
// 1011 1000: P_STD map to all audio streams
// 1011 1001: P_STD map to all video streams
// otherwise, must be >= 1011 1100
//
uint8_t bits[2];
/*
uint16_t marker0:2; // 11
uint16_t P_STD_buffer_bound_scale:1;
uint16_t P_STD_buffer_size_bound:13;
*/
} stream_id_t;
typedef struct {
uint8_t start_code[4];
/*
uint32_t marker0:2; // 01
uint32_t system_clock_reference_base_hi:3;
uint32_t marker1:1; // 1
uint32_t system_clock_reference_base_mid:15;
uint32_t marker2:1; // 1
uint32_t system_clock_reference_base_low:15;
uint16_t marker3:1; // 1
uint16_t system_clock_reference_extension:9;
uint16_t marker4:1; // 1
uint32_t program_mux_rate:22;
uint32_t marker5:1; // 1
uint32_t marker6:1; // 1
uint8_t reserved:5;
uint8_t pack_stuffing_length:3;
*/
uint8_t bits[10];
} pack_header_t;
#endif // _MPEG2STRUCTS_H_
/* vi:set ai ts=4 sw=4 expandtab: */
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