| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| #include "pvwavfileparser.h" |
| #include "oscl_dll.h" |
| OSCL_DLL_ENTRY_POINT_DEFAULT() |
| |
| const short MuLawDecompressTable[256] = |
| { |
| -32124, -31100, -30076, -29052, -28028, -27004, -25980, -24956, |
| -23932, -22908, -21884, -20860, -19836, -18812, -17788, -16764, |
| -15996, -15484, -14972, -14460, -13948, -13436, -12924, -12412, |
| -11900, -11388, -10876, -10364, -9852, -9340, -8828, -8316, |
| -7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140, |
| -5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092, |
| -3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004, |
| -2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980, |
| -1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436, |
| -1372, -1308, -1244, -1180, -1116, -1052, -988, -924, |
| -876, -844, -812, -780, -748, -716, -684, -652, |
| -620, -588, -556, -524, -492, -460, -428, -396, |
| -372, -356, -340, -324, -308, -292, -276, -260, |
| -244, -228, -212, -196, -180, -164, -148, -132, |
| -120, -112, -104, -96, -88, -80, -72, -64, |
| -56, -48, -40, -32, -24, -16, -8, 0, |
| 32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956, |
| 23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764, |
| 15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412, |
| 11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316, |
| 7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140, |
| 5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092, |
| 3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004, |
| 2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980, |
| 1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436, |
| 1372, 1308, 1244, 1180, 1116, 1052, 988, 924, |
| 876, 844, 812, 780, 748, 716, 684, 652, |
| 620, 588, 556, 524, 492, 460, 428, 396, |
| 372, 356, 340, 324, 308, 292, 276, 260, |
| 244, 228, 212, 196, 180, 164, 148, 132, |
| 120, 112, 104, 96, 88, 80, 72, 64, |
| 56, 48, 40, 32, 24, 16, 8, 0 |
| }; |
| |
| const short ALawDecompressTable[256] = |
| { |
| -5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736, |
| -7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784, |
| -2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368, |
| -3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392, |
| -22016, -20992, -24064, -23040, -17920, -16896, -19968, -18944, |
| -30208, -29184, -32256, -31232, -26112, -25088, -28160, -27136, |
| -11008, -10496, -12032, -11520, -8960, -8448, -9984, -9472, |
| -15104, -14592, -16128, -15616, -13056, -12544, -14080, -13568, |
| -344, -328, -376, -360, -280, -264, -312, -296, |
| -472, -456, -504, -488, -408, -392, -440, -424, |
| -88, -72, -120, -104, -24, -8, -56, -40, |
| -216, -200, -248, -232, -152, -136, -184, -168, |
| -1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184, |
| -1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696, |
| -688, -656, -752, -720, -560, -528, -624, -592, |
| -944, -912, -1008, -976, -816, -784, -880, -848, |
| 5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736, |
| 7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784, |
| 2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368, |
| 3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392, |
| 22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944, |
| 30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136, |
| 11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472, |
| 15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568, |
| 344, 328, 376, 360, 280, 264, 312, 296, |
| 472, 456, 504, 488, 408, 392, 440, 424, |
| 88, 72, 120, 104, 24, 8, 56, 40, |
| 216, 200, 248, 232, 152, 136, 184, 168, |
| 1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184, |
| 1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696, |
| 688, 656, 752, 720, 560, 528, 624, 592, |
| 944, 912, 1008, 976, 816, 784, 880, 848 |
| }; |
| |
| |
| |
| OSCL_EXPORT_REF PV_Wav_Parser::~PV_Wav_Parser() |
| { |
| CleanupWAVFile(); |
| } |
| |
| /* ======================================================================== */ |
| /* Function : ReadData() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : Read data from file in a buffer */ |
| /* In/out : */ |
| /* Return : Result of read operation */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| PVWavParserReturnCode PV_Wav_Parser::ReadData(uint8* buff, uint32 size, uint32& bytesread) |
| { |
| OSCL_ASSERT(ipWAVFile != NULL); |
| |
| // read data |
| if ((bytesread = ipWAVFile->Read(buff, 1, size)) == 0) |
| { |
| if (ipWAVFile->EndOfFile()) |
| return PVWAVPARSER_END_OF_FILE; |
| else |
| return PVWAVPARSER_READ_ERROR; |
| } |
| return PVWAVPARSER_OK; |
| } |
| |
| /* ======================================================================== */ |
| /* Function : CleanupWAVFile() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : Close the file and reset any associated variables */ |
| /* In/out : */ |
| /* Return : Result of read operation */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| OSCL_EXPORT_REF void PV_Wav_Parser::CleanupWAVFile(void) |
| { |
| if (ipWAVFile != NULL) |
| ipWAVFile->Close(); |
| OSCL_DELETE(ipWAVFile); |
| ipWAVFile = NULL; |
| |
| AudioFormat = 0; |
| NumChannels = 0; |
| SampleRate = 0; |
| ByteRate = 0; |
| BlockAlign = 0; |
| BitsPerSample = 0; |
| BytesPerSample = 0; |
| PCMBytesRead = 0; |
| PCMBytesPresent = 0; |
| iHeaderSize = 0; |
| isLittleEndian = 1; // little endian by default |
| xLawTable = NULL; |
| } |
| |
| |
| /* ======================================================================== */ |
| /* Function : InitWavParser() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : Initialize WAVE Parser */ |
| /* In/out : */ |
| /* Return : Result of reading the WAV file */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| OSCL_EXPORT_REF PVWavParserReturnCode PV_Wav_Parser::InitWavParser(OSCL_wString& aClip, Oscl_FileServer* aFileSession) |
| { |
| //buffer |
| uint8 iBuffer[36]; |
| |
| // If a WAV file is already open, close it first and delete the file pointer |
| CleanupWAVFile(); |
| |
| // Open the file (aClip) |
| ipWAVFile = OSCL_NEW(Oscl_File, (4096)); |
| if (ipWAVFile == NULL) |
| { |
| return PVWAVPARSER_READ_ERROR; |
| } |
| |
| if (ipWAVFile->Open(aClip.get_cstr(), (Oscl_File::MODE_READ | Oscl_File::MODE_BINARY), *aFileSession) != 0) |
| { |
| OSCL_DELETE(ipWAVFile); |
| ipWAVFile = NULL; |
| return PVWAVPARSER_READ_ERROR; |
| } |
| |
| // Get file size at the very first time |
| int32 filesize = 0; |
| if (ipWAVFile->Seek(0, Oscl_File::SEEKEND)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| |
| filesize = (TOsclFileOffsetInt32)ipWAVFile->Tell(); |
| |
| if (filesize <= 0) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| |
| if (ipWAVFile->Seek(0, Oscl_File::SEEKSET)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| int32 filepos = 0; |
| |
| // read 12 bytes of data for complete WAVE header including RIFF chunk dDescriptor |
| |
| uint32 bytesread = 0; |
| if (ReadData(iBuffer, 12, bytesread) != PVWAVPARSER_OK) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| if (bytesread != 12) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| // Update file position counter by 36 bytes |
| filepos += 12; |
| |
| // Check for RIFF/RIFX |
| uint8* pBuffer = &iBuffer[0]; |
| if (pBuffer[0] == 'R' && |
| pBuffer[1] == 'I' && |
| pBuffer[2] == 'F' && |
| pBuffer[3] == 'F') |
| { |
| isLittleEndian = 1; // Little endian data |
| } |
| else if (pBuffer[0] == 'R' && |
| pBuffer[1] == 'I' && |
| pBuffer[2] == 'F' && |
| pBuffer[3] == 'X') |
| { |
| isLittleEndian = 0; // Big endian data |
| } |
| else |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_UNSUPPORTED_FORMAT; |
| } |
| |
| // If a .wav file is clipped manually , the ChunkSize would not relate to the file size. However, we |
| // should still attempt to play that clip for the existing length of the file. To enforce the restriction, |
| // we may opt to uncomment the following lines of code. |
| |
| // To read ChunkSize (in RIFF chunk descriptor) from little endian |
| /* |
| uint32 ChunkSize; |
| |
| ChunkSize = (((*(pBuffer + 7)) <<24)|((*(pBuffer + 6)) << 16)|((*(pBuffer + 5)) << 8)|(*(pBuffer + 4))); |
| if((int32)ChunkSize!= (filesize - 8)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| */ |
| |
| // Check for WAVE in Format field |
| if (pBuffer[ 8] != 'W' || |
| pBuffer[ 9] != 'A' || |
| pBuffer[10] != 'V' || |
| pBuffer[11] != 'E') |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_UNSUPPORTED_FORMAT; |
| } |
| |
| uint32 SubChunk_Size = 0; |
| |
| bool fmtSubchunkFound = false; |
| while (!fmtSubchunkFound) |
| { |
| // read 8 bytes from file to check for next subchunk |
| bytesread = 0; |
| if (ReadData(iBuffer, 8, bytesread) != PVWAVPARSER_OK) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| if (bytesread != 8) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| // Update file position counter by 8 bytes |
| filepos += 8; |
| uint8* pTempBuffer = &iBuffer[0]; |
| SubChunk_Size = (((*(pTempBuffer + 7)) << 24) | ((*(pTempBuffer + 6)) << 16) | ((*(pTempBuffer + 5)) << 8) | (*(pTempBuffer + 4))); |
| |
| // typecast filesize as uint32 - to get to this point, it MUST be |
| // greater than 0. |
| if ((filepos + SubChunk_Size) > (uint32)filesize) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| // Check for FMT subchunk |
| if (pTempBuffer[0] != 'f' || |
| pTempBuffer[1] != 'm' || |
| pTempBuffer[2] != 't' || |
| pTempBuffer[3] != ' ') |
| { |
| // "fmt " chunk not found - Unknown subchunk |
| filepos += SubChunk_Size; |
| if (ipWAVFile->Seek(filepos, Oscl_File::SEEKSET)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| } |
| else |
| fmtSubchunkFound = true; |
| } |
| if (ReadData(iBuffer, 16, bytesread) != PVWAVPARSER_OK) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| if (bytesread != 16) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| filepos += 16; |
| |
| pBuffer = &iBuffer[0]; |
| |
| AudioFormat = (unsigned short)(((*(pBuffer + 1)) << 8) | (*pBuffer)); // Save AudioFormat (PCM = 1) |
| xLawTable = NULL; |
| |
| NumChannels = (unsigned short)(((*(pBuffer + 3)) << 8) | (*(pBuffer + 2))); // Save Number of Channels |
| SampleRate = (((*(pBuffer + 7)) << 24) | ((*(pBuffer + 6)) << 16) | ((*(pBuffer + 5)) << 8) | (*(pBuffer + 4))); // Save Sampling rate |
| ByteRate = (((*(pBuffer + 11)) << 24) | ((*(pBuffer + 10)) << 16) | ((*(pBuffer + 9)) << 8) | (*(pBuffer + 8))); // Save ByteRate ( == SampleRate*NumChannels*BitsPerSample/8) |
| BlockAlign = (unsigned short)(((*(pBuffer + 13)) << 8) | (*(pBuffer + 12))); // Save BlockAlign ( == NumChannels*BitsPerSample/8) |
| BitsPerSample = (unsigned short)(((*(pBuffer + 15)) << 8) | (*(pBuffer + 14))); // Save BitsPerSample (8 bits == 8, 16 bits == 16 etc.) |
| BytesPerSample = (BitsPerSample + 7) / 8; // compute (ceil(BitsPerSample/8)) |
| |
| // Check for SubChunk_Size (It should be 16 for PCM) |
| // skip remaining bytes if any because we don't currently support any compressed audio formats |
| if (SubChunk_Size != 16) |
| { |
| // seek ahead by Subchunk1_Size - 16 |
| filepos += SubChunk_Size - 16; |
| if (ipWAVFile->Seek(filepos, Oscl_File::SEEKSET)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| } |
| |
| bool DataSubchunkFound = false; |
| |
| while (!DataSubchunkFound) |
| { |
| // read 8 bytes from file to check for next subchunk |
| bytesread = 0; |
| if (ReadData(iBuffer, 8, bytesread) != PVWAVPARSER_OK) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| if (bytesread != 8) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_READ_ERROR; |
| } |
| // Update file position counter by 8 bytes |
| filepos += 8; |
| |
| uint8* pTempBuffer = &iBuffer[0]; |
| |
| //It means that some unknown subchunk is present |
| // Calculate SubChunk Size |
| SubChunk_Size = (((*(pTempBuffer + 7)) << 24) | ((*(pTempBuffer + 6)) << 16) | ((*(pTempBuffer + 5)) << 8) | (*(pTempBuffer + 4))); |
| |
| // Check for DATA subchunk ID |
| if (pTempBuffer[0] != 'd' || |
| pTempBuffer[1] != 'a' || |
| pTempBuffer[2] != 't' || |
| pTempBuffer[3] != 'a') |
| { |
| // we need to skip this many bytes |
| filepos += SubChunk_Size; |
| |
| // seek file pointer to current file position |
| if (ipWAVFile->Seek(filepos, Oscl_File::SEEKSET)) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| } |
| else |
| { |
| // data subchunk found |
| |
| // header size equals current file pos |
| iHeaderSize = filepos; |
| |
| //data subchunk is found |
| DataSubchunkFound = true; |
| |
| // Read data SubChunk Size (is number of bytes in data or PCMBytesPresent) |
| PCMBytesPresent = SubChunk_Size; |
| iEndOfDataSubChunkOffset = filepos + PCMBytesPresent; //This is where the DataSubChunk is supposed to end |
| |
| //(this check is required to avoid memory crash if any of BytesPerSample or NumChannels is '0') |
| if (BytesPerSample && NumChannels) |
| { |
| NumSamples = ((PCMBytesPresent / (BytesPerSample)) / NumChannels); |
| } |
| } |
| } |
| |
| //return error if any of these value is not given in wav file header |
| //(AudioFormat check is done at node level) |
| if (!NumChannels || !NumSamples || !SampleRate || !BitsPerSample || !BytesPerSample || !ByteRate) |
| { |
| CleanupWAVFile(); |
| return PVWAVPARSER_UNSUPPORTED_FORMAT; //any error fom parse will be handled as PVMFFailure at corresponsding node level |
| } |
| |
| return PVWAVPARSER_OK; |
| } |
| |
| |
| /* ======================================================================== */ |
| /* Function : GetPCMData() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : Copy specified number of samples to output buffer */ |
| /* In/out : */ |
| /* Return : Result of read operation */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| OSCL_EXPORT_REF PVWavParserReturnCode PV_Wav_Parser::GetPCMData(uint8* inBuff, uint32 inBufSize, uint32 NumberOfSamples, uint32& NumSamplesRead) |
| { |
| NumSamplesRead = 0; |
| uint32 BytesRead = 0; |
| |
| uint32 myBufSize = NumberOfSamples * BytesPerSample * NumChannels; |
| if ((ipWAVFile->Tell() + myBufSize) > iEndOfDataSubChunkOffset) |
| {//we don't have enough data to fulfill this request |
| int32 pos = (TOsclFileOffsetInt32)ipWAVFile->Tell(); |
| if (((uint32)(BytesPerSample*NumChannels) + pos) > iEndOfDataSubChunkOffset) |
| { |
| return PVWAVPARSER_END_OF_FILE; |
| } |
| NumberOfSamples = (iEndOfDataSubChunkOffset - pos) / (BytesPerSample * NumChannels); |
| myBufSize = NumberOfSamples * BytesPerSample * NumChannels; |
| } |
| |
| |
| if (xLawTable) |
| { |
| //PCM16 2 bytes per sample |
| if (myBufSize*2 > inBufSize) |
| { |
| //buffer too small |
| return PVWAVPARSER_MISC_ERROR ; |
| } |
| if ((uint32)inBuff & 0x3) |
| { |
| //buffer not word aligned |
| return PVWAVPARSER_MISC_ERROR ; |
| } |
| |
| PVWavParserReturnCode retcode = ReadData(inBuff, myBufSize, BytesRead); |
| if (retcode == PVWAVPARSER_OK) |
| { |
| uint8 *mySrcBuf = &inBuff[BytesRead-1]; |
| short *myDstBuf = &(((short*) inBuff)[BytesRead-1]); |
| for (int i = BytesRead; i > 0; i--) |
| *myDstBuf-- = xLawTable[*mySrcBuf--]; |
| |
| // Calculate the number of samples read based on the bytes read from file |
| NumSamplesRead = (BytesRead / BytesPerSample) / NumChannels; |
| } |
| return retcode; |
| } |
| |
| if (myBufSize > inBufSize) |
| { |
| //buffer too small |
| return PVWAVPARSER_MISC_ERROR ; |
| } |
| PVWavParserReturnCode retcode = ReadData(inBuff, myBufSize, BytesRead); |
| if (retcode == PVWAVPARSER_OK) |
| { |
| // Calculate the number of samples read based on the bytes read from file |
| NumSamplesRead = (BytesRead / BytesPerSample) / NumChannels; |
| } |
| return retcode; |
| } |
| |
| |
| /* ======================================================================== */ |
| /* Function : RetrieveFileInfo() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : */ |
| /* In/out : */ |
| /* Return : true / false */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| OSCL_EXPORT_REF bool PV_Wav_Parser::RetrieveFileInfo(PVWAVFileInfo& aInfo) |
| { |
| // If the file pointer is valid, then WAV file has been parsed |
| if (ipWAVFile) |
| { |
| aInfo.AudioFormat = AudioFormat; |
| aInfo.NumChannels = NumChannels; |
| aInfo.SampleRate = SampleRate; |
| aInfo.ByteRate = ByteRate; |
| aInfo.BlockAlign = BlockAlign; |
| aInfo.BitsPerSample = BitsPerSample; |
| aInfo.BytesPerSample = BytesPerSample; |
| aInfo.NumSamples = NumSamples; |
| aInfo.isLittleEndian = isLittleEndian; |
| |
| return true; |
| } |
| else |
| { |
| return false; |
| } |
| } |
| |
| OSCL_EXPORT_REF bool PV_Wav_Parser::SetOutputToUncompressedPCM(void) |
| { |
| xLawTable = NULL; |
| if (PVWAV_ITU_G711_ULAW == AudioFormat) |
| { |
| xLawTable = OSCL_CONST_CAST(short*, MuLawDecompressTable); |
| return true; |
| } |
| else if (PVWAV_ITU_G711_ALAW == AudioFormat) |
| { |
| xLawTable = OSCL_CONST_CAST(short*, ALawDecompressTable); |
| return true; |
| } |
| else if (AudioFormat == PVWAV_PCM_AUDIO_FORMAT) |
| { |
| if ((8 == BitsPerSample) || isLittleEndian) |
| return true; |
| } |
| return false; |
| } |
| |
| /* ======================================================================== */ |
| /* Function : SeekPCMSample() */ |
| /* Author : */ |
| /* Date : */ |
| /* Purpose : */ |
| /* In/out : */ |
| /* Return : Result of seek operation */ |
| /* Note : */ |
| /* Modified : */ |
| /* ======================================================================== */ |
| OSCL_EXPORT_REF PVWavParserReturnCode PV_Wav_Parser::SeekPCMSample(uint32 SampleNumber) |
| { |
| if (ipWAVFile == NULL) |
| { |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| |
| if (SampleNumber >= NumSamples) |
| { |
| // seek to the end of the file and return; |
| ipWAVFile->Seek(0, Oscl_File::SEEKEND); |
| return PVWAVPARSER_OK; |
| } |
| |
| // valid header size must be present(it is initialized only if valid data subchunk is present) |
| if (iHeaderSize) |
| { |
| // Seek to file position corresponding to headersize+(sample# * numchannels * bytespersample) |
| if (ipWAVFile->Seek((iHeaderSize + (SampleNumber*NumChannels*(BytesPerSample))), Oscl_File::SEEKSET)) |
| { |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| } |
| else |
| { |
| return PVWAVPARSER_MISC_ERROR; |
| } |
| |
| return PVWAVPARSER_OK; |
| } |
| |
| |
| |
| |
| |
| |
| |
| |
| |
