00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00029
00030
00031
00032 #include "stdafx.h"
00033 #include "OggFLAC_1_0_Stream.h"
00034
00035
00036 OggFLAC_1_0_Stream::OggFLAC_1_0_Stream(OggPage* inBOSPage, OggDemuxSourceFilter* inOwningFilter, bool inAllowSeek)
00037 : OggStream(inBOSPage, inOwningFilter, inAllowSeek)
00038 , mFLACFormatBlock(NULL)
00039 , mIsFixedNumHeaders(false)
00040
00041 {
00042 InitCodec(inBOSPage->getStampedPacket(0));
00043 }
00044
00045 OggFLAC_1_0_Stream::~OggFLAC_1_0_Stream(void)
00046 {
00047 delete mFLACFormatBlock;
00048 }
00049
00050 bool OggFLAC_1_0_Stream::InitCodec(StampedOggPacket* inOggPacket) {
00051
00052 mCodecHeaders = new StreamHeaders;
00053 mCodecHeaders->mCodecType = StreamHeaders::FLAC;
00054 mCodecHeaders->addPacket((StampedOggPacket*)inOggPacket->clone());
00055
00056
00057
00058
00059
00060
00061
00062 mNumHeadersNeeded = iBE_Math::charArrToUShort(inOggPacket->packetData() + 7);
00063
00064 if (mNumHeadersNeeded == 0) {
00065
00066
00067 mNumHeadersNeeded = 1;
00068 mIsFixedNumHeaders = false;
00069 } else {
00070 mIsFixedNumHeaders = true;
00071 }
00072 return true;
00073 }
00074
00075 wstring OggFLAC_1_0_Stream::getPinName() {
00076 wstring locName = L"FLAC Out";
00077 return locName;
00078 }
00079
00080 bool OggFLAC_1_0_Stream::createFormatBlock() {
00081 const unsigned char FLAC_CHANNEL_MASK = 14;
00082 const unsigned char FLAC_BPS_START_MASK = 1;
00083 const unsigned char FLAC_BPS_END_MASK = 240;
00084 mFLACFormatBlock = new sFLACFormatBlock;
00085
00086
00087 mFLACFormatBlock->numChannels = (((mCodecHeaders->getPacket(0)->packetData()[29]) & FLAC_CHANNEL_MASK) >> 1) + 1;
00088 mFLACFormatBlock->samplesPerSec = (iBE_Math::charArrToULong(mCodecHeaders->getPacket(0)->packetData() + 27)) >> 12;
00089
00090 mFLACFormatBlock->numBitsPerSample = (((mCodecHeaders->getPacket(0)->packetData()[29] & FLAC_BPS_START_MASK) << 4) |
00091 ((mCodecHeaders->getPacket(0)->packetData()[30] & FLAC_BPS_END_MASK) >> 4)) + 1;
00092 return true;
00093 }
00094 BYTE* OggFLAC_1_0_Stream::getFormatBlock() {
00095
00096 return (BYTE*)mFLACFormatBlock;
00097
00098
00099 }
00100 unsigned long OggFLAC_1_0_Stream::getFormatBlockSize() {
00101
00102 return sizeof(sFLACFormatBlock);
00103 }
00104 GUID OggFLAC_1_0_Stream::getFormatGUID() {
00105 return FORMAT_FLAC;
00106 }
00107 GUID OggFLAC_1_0_Stream::getSubtypeGUID() {
00108 return MEDIASUBTYPE_FLAC;
00109 }
00110 GUID OggFLAC_1_0_Stream::getMajorTypeGUID() {
00111 return MEDIATYPE_Audio;
00112 }
00113
00114 unsigned long OggFLAC_1_0_Stream::getNumBuffers() {
00115 return OGG_FLAC_1_0_NUM_BUFFERS;
00116 }
00117 unsigned long OggFLAC_1_0_Stream::getBufferSize() {
00118 return OGG_FLAC_1_0_BUFFER_SIZE;
00119 }
00120
00121
00122 bool OggFLAC_1_0_Stream::processHeaderPacket(StampedOggPacket* inPacket) {
00123
00124 const unsigned char MORE_HEADERS_MASK = 128;
00125
00126
00127 if (inPacket != NULL) {
00128
00129 mCodecHeaders->addPacket(inPacket);
00130 if (mIsFixedNumHeaders) {
00131 mNumHeadersNeeded--;
00132 } else {
00133 if ((inPacket->packetData()[0] & MORE_HEADERS_MASK) != 0) {
00134 mNumHeadersNeeded--;
00135
00136 }
00137 }
00138 }
00139 return true;
00140 }
00141 void OggFLAC_1_0_Stream::setLastEndGranPos(__int64 inPos) {
00142 mLastEndGranulePos = (inPos * (__int64)mFLACFormatBlock->samplesPerSec)/ UNITS;
00143 }
00144 bool OggFLAC_1_0_Stream::deliverCodecHeaders() {
00145
00146 StampedOggPacket* locPacket = NULL;
00147 for (unsigned long i = 0; i < mCodecHeaders->numPackets(); i++) {
00148 if (i==0) {
00149
00150
00151
00152
00153
00154
00155
00156
00157 unsigned char* locPackBuf = new unsigned char[42];
00158
00159
00160 memcpy((void*)locPackBuf, (const void*)(mCodecHeaders->getPacket(0)->packetData() + 9), 42);
00161 locPacket = new StampedOggPacket(locPackBuf, 42, false, false, 0, 0, StampedOggPacket::OGG_END_ONLY);
00162 } else {
00163 locPacket->merge(mCodecHeaders->getPacket(i));
00164 }
00165 }
00166 if (mCodecHeaders->numPackets() > 0) {
00167 dispatchPacket(locPacket);
00168 }
00169 return true;
00170 }
00171
00172 LONGLONG OggFLAC_1_0_Stream::getCurrentPos() {
00173 return (mLastEndGranulePos * UNITS) / mFLACFormatBlock->samplesPerSec;
00174 }
00175
00176
00177
00178