flvformat.h

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/********************************************************************************************
* Twitch Broadcasting SDK
*
* This software is supplied under the terms of a license agreement with Twitch Interactive, Inc. and
* may not be copied or used except in accordance with the terms of that agreement
* Copyright (c) 2012-2016 Twitch Interactive, Inc.
*********************************************************************************************/

#ifndef FLVFORMAT_H
#define FLVFORMAT_H

namespace ttv
{
    namespace broadcast
    {
        namespace flv
        {
            struct Header;
            struct TagHeader;
            struct TagFooter;

            enum TagTypes : uint8_t
            {
                Audio = 0x08,
                Video = 0x09,
                Meta = 0x12
            };

            typedef uint8_t uint24_t[3];

            #pragma pack(push)
            #pragma pack(1)

            struct Header
            {
                Header()
                :   mSignature{0, 0, 0}
                ,   mVersion(0)
                ,   mFlags(0)
                ,   mHeaderSize(0)
                {
                }

                uint24_t mSignature;
                uint8_t mVersion;
                uint8_t mFlags;
                uint32_t mHeaderSize;
            };

            struct TagHeader
            {
                TagHeader()
                :   mPacketType(Audio)
                ,   mPacketLength{0, 0, 0}
                ,   mPacketTimestamp{0, 0, 0}
                ,   mPacketExtendedTimestamp(0)
                ,   mStreamId{0, 0, 0}
                {
                }

                TagTypes mPacketType;
                uint24_t mPacketLength;
                uint24_t mPacketTimestamp;
                uint8_t  mPacketExtendedTimestamp;
                uint24_t mStreamId;
            };

            struct TagFooter
            {
                TagFooter()
                :   mLength(0)
                {
                }

                uint32_t mLength; // Should be TagHeader.mPacketLength + sizeof (flv::TagHeader);
            };

            #pragma pack(pop)
        }
    }
}

#endif