MPEGDEF.H

//==========================================================================; 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR 
//  PURPOSE. 
// 
//  Copyright (c) 1996 - 1997  Microsoft Corporation.  All Rights Reserved. 
// 
//--------------------------------------------------------------------------; 
// 
 
/* 
    mpegdef.h 
 
    This file defines the externals for interfacing with MPEG 
    components 
*/ 
 
/* 
 
    MPEG constants 
 
*/ 
 
#define MPEG_TIME_DIVISOR (90000) 
#define MPEG_MAX_TIME ((LONGLONG)0x200000000) 
 
#define PICTURE_START_CODE       0x00000100 
#define USER_DATA_START_CODE     0x000001B2 
#define SEQUENCE_HEADER_CODE     0x000001B3 
#define SEQUENCE_ERROR_CODE      0x000001B4 
#define EXTENSION_START_CODE     0x000001B5 
#define SEQUENCE_END_CODE        0x000001B7 
#define GROUP_START_CODE         0x000001B8 
 
#define ISO_11172_END_CODE       0x000001B9 
#define PACK_START_CODE          0x000001BA 
#define SYSTEM_HEADER_START_CODE 0x000001BB 
#define PADDING_START_CODE       0x000001BE 
#define PACKET_START_CODE_MIN    0x000001BC 
#define PACKET_START_CODE_MAX    0x000001FF 
 
#define AUDIO_GLOBAL             0xB8 
#define VIDEO_GLOBAL             0xB9 
#define RESERVED_STREAM          0xBC 
#define PRIVATE_STREAM_1         0xBD 
#define PADDING_STREAM           0xBE 
#define PRIVATE_STREAM_2         0xBF 
#define AUDIO_STREAM             0xC0 
#define AUDIO_STREAM_MASK        0xE0 
#define VIDEO_STREAM             0xE0 
#define VIDEO_STREAM_MASK        0xF0 
#define DATA_STREAM              0xF0 
#define DATA_STREAM_MASK         0xF0 
 
/*  MPEG-2 stuff */ 
#define PROGRAM_STREAM_DIRECTORY 0xFF 
#define PROGRAM_STREAM_MAP       0xBC 
#define ANCILLIARY_STREAM        0xF9 
#define ECM_STREAM               0xF0 
#define EMM_STREAM               0xF1 
 
#define VALID_PACKET(data)      (((data) >= PACKET_START_CODE_MIN)  \ 
                              && ((data) <= PACKET_START_CODE_MAX)) 
 
#define VALID_SYSTEM_START_CODE(data)     \ 
       (VALID_PACKET(data)                \ 
    ||  (data) == SYSTEM_HEADER_START_CODE\ 
    ||  (data) == PACK_START_CODE         \ 
    ||  (data) == ISO_11172_END_CODE) 
 
 
/*  Types of stream */ 
inline BOOL IsVideoStreamId(BYTE StreamId) 
{ 
    return (StreamId & 0xF0) == 0xE0; 
} ; 
inline BOOL IsAudioStreamId(BYTE StreamId) 
{ 
    return (StreamId & 0xE0) == 0xC0; 
} ; 
 
#define MAX_MPEG_PACKET_SIZE (65535+6) 
 
/*  Lengths of the various structures */ 
#define PACK_HEADER_LENGTH 12 
#define SYSTEM_HEADER_BASIC_LENGTH 12 
 
inline DWORD DWORD_SWAP(DWORD x) 
{ 
    return 
     ((DWORD)( ((x) << 24) | ((x) >> 24) | 
               (((x) & 0xFF00) << 8) | (((x) & 0xFF0000) >> 8))); 
} 
 
 
/*  Video definitions */ 
 
/*  Frame types as defined in a picture header */ 
#define I_Frame 1 
#define D_Frame 4 
#define P_Frame 2 
#define B_Frame 3