VorbisStream.cpp

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00001 //===========================================================================
00002 //Copyright (C) 2003, 2004 Zentaro Kavanagh
00003 //
00004 //Redistribution and use in source and binary forms, with or without
00005 //modification, are permitted provided that the following conditions
00006 //are met:
00007 //
00008 //- Redistributions of source code must retain the above copyright
00009 //  notice, this list of conditions and the following disclaimer.
00010 //
00011 //- Redistributions in binary form must reproduce the above copyright
00012 //  notice, this list of conditions and the following disclaimer in the
00013 //  documentation and/or other materials provided with the distribution.
00014 //
00015 //- Neither the name of Zentaro Kavanagh nor the names of contributors 
00016 //  may be used to endorse or promote products derived from this software 
00017 //  without specific prior written permission.
00018 //
00019 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00020 //``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00021 //LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00022 //PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
00023 //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024 //EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00025 //PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026 //PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027 //LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028 //NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029 //SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 //===========================================================================
00031 #include "stdafx.h"
00032 #include "vorbisstream.h"
00033 
00034 VorbisStream::VorbisStream(OggPage* inBOSPage, OggDemuxSourceFilter* inOwningFilter, bool inAllowSeek)
00035         :       OggStream(inBOSPage, inOwningFilter, inAllowSeek)
00036         ,       mVorbisFormatBlock(NULL)
00037 {
00038         InitCodec(inBOSPage->getStampedPacket(0));
00039         //debugLog.open("G:\\logs\\vorbisstream.log", ios_base::out);
00040 }
00041 
00042 VorbisStream::~VorbisStream(void)
00043 {
00044         delete mVorbisFormatBlock;
00045 }
00046 
00047 
00048 bool VorbisStream::InitCodec(StampedOggPacket* inOggPacket) {
00049         mCodecHeaders = new StreamHeaders;
00050         mCodecHeaders->mCodecType = StreamHeaders::VORBIS;
00051         mCodecHeaders->addPacket((StampedOggPacket*)inOggPacket->clone());
00052         mNumHeadersNeeded = 2;
00053         return true;
00054 }
00055 
00056 BYTE* VorbisStream::getFormatBlock() {
00057 
00058         return (BYTE*)mVorbisFormatBlock;
00059 
00060 }
00061 bool VorbisStream::createFormatBlock() {
00062         //Check where this gets deleted
00063         mVorbisFormatBlock = new sVorbisFormatBlock;
00064         mVorbisFormatBlock->vorbisVersion = iLE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 7);
00065         mVorbisFormatBlock->numChannels = mCodecHeaders->getPacket(0)->packetData()[11];
00066         mVorbisFormatBlock->samplesPerSec = iLE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 12);
00067         mVorbisFormatBlock->maxBitsPerSec = iLE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 16);
00068         mVorbisFormatBlock->avgBitsPerSec = iLE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 20);
00069         mVorbisFormatBlock->minBitsPerSec = iLE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 24);
00070 
00071         return true;
00072 }
00073 
00074 void VorbisStream::setLastEndGranPos(__int64 inPos) {
00075         //debugLog<<"Vorbis inPos = "<<inPos<<endl;
00076         mLastEndGranulePos = (inPos * (__int64)mVorbisFormatBlock->samplesPerSec)/ UNITS;
00077         //debugLog<<"Vorbis sets End Gran : "<<mLastEndGranulePos<<endl;
00078 }
00079 unsigned long VorbisStream::getFormatBlockSize() {
00080         return sizeof(sVorbisFormatBlock);
00081 }
00082 GUID VorbisStream::getFormatGUID() {
00083         return FORMAT_Vorbis;
00084 }
00085 GUID VorbisStream::getSubtypeGUID() {
00086         return MEDIASUBTYPE_Vorbis;
00087 }
00088 wstring VorbisStream::getPinName() {
00089         wstring retName = L"Vorbis Out";
00090         return retName;
00091 }
00092 GUID VorbisStream::getMajorTypeGUID() {
00093         return MEDIATYPE_Audio;
00094 }
00095 
00096 LONGLONG VorbisStream::getCurrentPos() {
00097         return (mLastEndGranulePos * UNITS) / mVorbisFormatBlock->samplesPerSec;
00098 }
00099 
00100 unsigned long VorbisStream::getNumBuffers() {
00101         return VORBIS_NUM_BUFFERS;
00102 }
00103 unsigned long VorbisStream::getBufferSize() {
00104         return VORBIS_BUFFER_SIZE;
00105 }

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