92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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This file defines a good file format to use for storing RTP streams.
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It is optimized for linear reads through the file, but also allows for
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seeking using a "Block Map", similar to a QuickTime sample table but more
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compressed.
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RTP PACKET FILE FORMAT DEFINITION:
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1 RTPFileHeader
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__ SDP DATA __
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1 RTPFileTrackInfo per track
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__ BLOCK MAP__
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packet, packet, packet
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Each packet is:
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1 RTPFilePacket, followed by data
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No partial packets allowed between blocks, blocks should finish with a pad packet
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*/
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#ifndef __RTP_FILE_DEFS__
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#define __RTP_FILE_DEFS__
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#include "OSHeaders.h"
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#define RTP_FILE_CURRENT_VERSION 0
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typedef struct RTPFileHeader
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{
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UInt32 fVersion; // Version 0
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Float64 fMovieDuration;
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UInt32 fSDPLen;
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UInt32 fNumTracks;
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UInt32 fMaxTrackID;
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UInt32 fBlockMapSize;
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UInt32 fDataStartPos;
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} RTPFileHeader;
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typedef struct RTPFileTrackInfo
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{
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UInt32 fID;
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UInt32 fTimescale;
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UInt64 fBytesInTrack;
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Float64 fDuration;
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} RTPFileTrackInfo;
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typedef struct RTPFilePacket
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{
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UInt16 fTrackID;
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UInt16 fPacketLength;
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Float64 fTransmitTime;
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} RTPFilePacket;
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static const UInt32 kBlockSize = 32768;
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static const UInt32 kBlockMask = 0xFFF8000;
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static const UInt16 kPaddingBit = 0x8000;
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#endif //__RTP_FILE_DEFS__
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