/* # # MPEG2 data structures for MPEG2Parser class # # $Id: mpeg2structs.h,v 1.2 2005/03/20 20:18:33 nemesis 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_ #include #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; typedef struct { uint8_t start_code[4]; uint8_t bits[8]; /* uint32_t horizontal_size_value:12; uint32_t vertical_size_value:12; uint32_t aspect_ratio_information:4; uint32_t frame_rate_code:4; uint32_t bit_rate_code:18; uint32_t marker1:1; uint32_t vbv_buffer_size_value:10; uint32_t constrained_parameters_flag:1; uint32_t load_intra_quantiser_matrix:1; uint8_t intra_quantiser_matrix[64]; // optional uint32_t load_non_intra_quantiser_matrix:1; uint8_t non_intra_quantiser_matrix[64]; // optional */ } sequence_header; typedef struct { uint8_t start_code[4]; uint8_t profile_and_level_indication; /* uint8_t progressive_sequence:1; uint8_t chroma_format:2; uint8_t horizontal_size_extension:2; uint8_t vertical_size_extension:2; uint8_t bit_rate_extension:12; uint8_t vbv_buffer_size_extension:8; uint8_t low_delay:1; uint8_t frame_rate_extension_n:2; uint8_t frame_rate_extension_d:5; */ } sequence_extension_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 // frame rates from the sequence header #define FPS_23_9 1 // 0001 -- 24000/1001 #define FPS_24 2 // 0010 -- 24 #define FPS_25 3 // 0011 -- 25 #define FPS_29_9 4 // 0100 -- 30000/1001 #define FPS_30 5 // 0101 -- 30 #define FPS_50 6 // 0110 -- 50 #define FPS_59_9 7 // 0111 -- 60000/1001 #define FPS_60 8 // 1000 -- 60 // aspect ratio values from the sequence header #define ASPECT_1 1 #define ASPECT_3_4 2 #define ASPECT_9_16 3 #define ASPECT_1_221 4 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]; /* uint8_t marker0:2; // 01 uint8_t system_clock_reference_base_hi:3; uint8_t marker1:1; // 1 uint16_t system_clock_reference_base_mid:15; uint8_t marker2:1; // 1 uint16_t system_clock_reference_base_low:15; uint8_t marker3:1; // 1 uint16_t system_clock_reference_extension:9; uint8_t marker4:1; // 1 uint32_t program_mux_rate:22; uint8_t marker5:1; // 1 uint8_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: */