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