1/* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18/*********************************************************************************/ 19/* ------------------------------------------------------------------- */ 20/* MPEG-4 HintMediaHeaderAtom Class */ 21/* ------------------------------------------------------------------- */ 22/*********************************************************************************/ 23/* 24 This HintMediaHeaderAtom Class contains general presentation information, 25 independent of coding, about the audio media within the stream. 26*/ 27 28 29#define IMPLEMENT_HintMediaHeaderAtom 30 31#include "hintmediaheaderatom.h" 32#include "atomutils.h" 33#include "atomdefs.h" 34 35// Stream-in ctor 36HintMediaHeaderAtom::HintMediaHeaderAtom(MP4_FF_FILE *fp, uint32 size, uint32 type) 37 : MediaInformationHeaderAtom(fp, size, type) 38{ 39 if (_success) 40 { 41 42 _pparent = NULL; 43 44 if (!AtomUtils::read16(fp, _maxPDUSize)) 45 _success = false; 46 if (!AtomUtils::read16(fp, _avgPDUSize)) 47 _success = false; 48 if (!AtomUtils::read32(fp, _maxBitrate)) 49 _success = false; 50 if (!AtomUtils::read32(fp, _avgBitrate)) 51 _success = false; 52 if (!AtomUtils::read32(fp, _slidingAvgBitrate)) 53 _success = false; 54 55 if (!_success) 56 _mp4ErrorCode = READ_HINT_MEDIA_HEADER_ATOM_FAILED; 57 } 58 else 59 { 60 if (_mp4ErrorCode != ATOM_VERSION_NOT_SUPPORTED) 61 _mp4ErrorCode = READ_HINT_MEDIA_HEADER_ATOM_FAILED; 62 } 63 64} 65 66// Destructor 67HintMediaHeaderAtom::~HintMediaHeaderAtom() 68{ 69 // Empty 70} 71 72uint32 73HintMediaHeaderAtom::getMediaInformationHeaderType() const 74{ 75 return (uint32)MEDIA_INFORMATION_HEADER_TYPE_HINT; 76} 77 78 79