126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is MPEG4IP.
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*
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* The Initial Developer of the Original Code is Cisco Systems Inc.
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* Portions created by Cisco Systems Inc. are
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* Copyright (C) Cisco Systems Inc. 2004. All Rights Reserved.
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*
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* Contributor(s):
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* Bill May wmay@cisco.com
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*/
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#include "mp4common.h"
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MP4SoundAtom::MP4SoundAtom(const char *atomid)
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: MP4Atom(atomid)
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{
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AddReserved("reserved1", 6); /* 0 */
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AddProperty( /* 1 */
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new MP4Integer16Property("dataReferenceIndex"));
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AddProperty( /* 2 */
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new MP4Integer16Property("soundVersion"));
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AddReserved( "reserved2", 6); /* 3 */
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AddProperty( /* 4 */
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new MP4Integer16Property("channels"));
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AddProperty( /* 5 */
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new MP4Integer16Property("sampleSize"));
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AddProperty( /* 6 */
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new MP4Integer16Property("packetSize"));
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AddProperty( /* 7 */
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new MP4Integer32Property("timeScale"));
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if (ATOMID(atomid) == ATOMID("mp4a")) {
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AddReserved("reserved3", 2); /* 8 */
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ExpectChildAtom("esds", Required, OnlyOne);
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ExpectChildAtom("wave", Optional, OnlyOne);
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} else if (ATOMID(atomid) == ATOMID("alac")) {
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AddReserved("reserved3", 2); /* 8 */
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ExpectChildAtom("alac", Optional, Optional);
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//AddProperty( new MP4BytesProperty("alacInfo", 36));
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}
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}
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void MP4SoundAtom::AddProperties (uint8_t version)
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{
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if (version > 0) {
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AddProperty( /* 8 */
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new MP4Integer32Property("samplesPerPacket"));
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AddProperty( /* 9 */
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new MP4Integer32Property("bytesPerPacket"));
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AddProperty( /* 10 */
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new MP4Integer32Property("bytesPerFrame"));
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AddProperty( /* 11 */
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new MP4Integer32Property("bytesPerSample"));
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}
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if (version == 2) {
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AddReserved("reserved4", 20);
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}
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}
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void MP4SoundAtom::Generate()
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{
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MP4Atom::Generate();
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((MP4Integer16Property*)m_pProperties[1])->SetValue(1);
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// property reserved2 has non-zero fixed values
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((MP4Integer16Property*)m_pProperties[2])->SetValue(0);
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static const u_int8_t reserved2[6] = {
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0x00, 0x00, 0x00, 0x00,
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0x00, 0x00,
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};
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m_pProperties[3]->SetReadOnly(false);
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((MP4BytesProperty*)m_pProperties[3])->
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SetValue(reserved2, sizeof(reserved2));
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m_pProperties[3]->SetReadOnly(true);
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((MP4Integer16Property*)m_pProperties[4])->SetValue(2);
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((MP4Integer16Property*)m_pProperties[5])->SetValue(0x0010);
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((MP4Integer16Property*)m_pProperties[6])->SetValue(0);
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}
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void MP4SoundAtom::Read()
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{
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MP4Atom *parent = GetParentAtom();
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if (ATOMID(parent->GetType()) != ATOMID("stsd")) {
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// Quicktime has an interesting thing - they'll put an mp4a atom
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// which is blank inside a wave atom, which is inside an mp4a atom
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// we have a mp4a inside an wave inside an mp4a - delete all properties
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m_pProperties.Delete(8);
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m_pProperties.Delete(7);
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m_pProperties.Delete(6);
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m_pProperties.Delete(5);
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m_pProperties.Delete(4);
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m_pProperties.Delete(3);
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m_pProperties.Delete(2);
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m_pProperties.Delete(1);
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m_pProperties.Delete(0);
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if (ATOMID(GetType()) == ATOMID("alac")) {
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AddProperty(new MP4BytesProperty("decoderConfig", m_size));
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ReadProperties();
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}
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if (m_pChildAtomInfos.Size() > 0) {
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ReadChildAtoms();
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}
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} else {
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ReadProperties(0, 3); // read first 3 properties
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AddProperties(((MP4IntegerProperty *)m_pProperties[2])->GetValue());
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ReadProperties(3); // continue
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if (m_pChildAtomInfos.Size() > 0) {
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ReadChildAtoms();
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}
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}
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Skip();
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}
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