diff -r 000000000000 -r 951a5db380a0 videoeditorengine/audioeditorengine/src/RateConverter.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/videoeditorengine/audioeditorengine/src/RateConverter.cpp Fri Jan 29 14:08:33 2010 +0200 @@ -0,0 +1,503 @@ +/* +* Copyright (c) 2010 Ixonos Plc. +* All rights reserved. +* This component and the accompanying materials are made available +* under the terms of the "Eclipse Public License v1.0" +* which accompanies this distribution, and is available +* at the URL "http://www.eclipse.org/legal/epl-v10.html". +* +* Initial Contributors: +* Nokia Corporation - Initial contribution +* +* Contributors: +* Ixonos Plc +* +* Description: +* +*/ + + + +#include "RateConverter.h" + + +// CONSTANTS + + + +// MACROS + +// Debug print macro +#if defined _DEBUG +#include +#define PRINT(x) RDebug::Print x; +#else +#define PRINT(x) +#endif + +// ----------------------------------------------------------------------------- +// CRateConverter::NewL +// Two-phased constructor. +// ----------------------------------------------------------------------------- +// +CRateConverter* CRateConverter::NewL(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels) + { + CRateConverter* self = NewLC(aFromSampleRate, aToSampleRate, aFromChannels, aToChannels); + CleanupStack::Pop(self); + return self; + } + +// ----------------------------------------------------------------------------- +// CRateConverter::NewLC +// Two-phased constructor. +// ----------------------------------------------------------------------------- +// +CRateConverter* CRateConverter::NewLC(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels) + { + CRateConverter* self = new (ELeave) CRateConverter(aFromSampleRate, aToSampleRate, aFromChannels, aToChannels); + CleanupStack::PushL(self); + self->ConstructL(); + return self; + } + +// ----------------------------------------------------------------------------- +// CRateConverter::ConstructL +// Symbian 2nd phase constructor can leave. +// ----------------------------------------------------------------------------- +// +void CRateConverter::ConstructL() + { + } + +// ----------------------------------------------------------------------------- +// CRateConverter::CRateConverter +// C++ default constructor can NOT contain any code, that +// might leave. +// ----------------------------------------------------------------------------- +// +CRateConverter::CRateConverter(TInt aFromSampleRate, TInt aToSampleRate, TInt aFromChannels, TInt aToChannels) + : iFromSampleRate(aFromSampleRate), iToSampleRate(aToSampleRate), + iFromChannels(aFromChannels), iToChannels(aToChannels) + { + // Select the smaller of the two + iChannels = (iFromChannels < iToChannels) ? iFromChannels : iToChannels; + } + +// --------------------------------------------------------- +// CRateConverter::~CRateConverter +// Destructor +// --------------------------------------------------------- +// +CRateConverter::~CRateConverter() + { + if (iChild) + { + delete iChild; + iChild = NULL; + } + + if (iConverter) + { + delete iConverter; + iConverter = NULL; + } + + if (iInBuffer) + { + for (TInt i = 0; (i < iChannels) && iInBuffer[i]; i++) + { + User::Free(iInBuffer[i]); + iInBuffer[i] = NULL; + } + User::Free(iInBuffer); + iInBuffer = NULL; + } + + if (iOutBuffer) + { + for (TInt i = 0; (i < iChannels) && iOutBuffer[i]; i++) + { + User::Free(iOutBuffer[i]); + iOutBuffer[i] = NULL; + } + User::Free(iOutBuffer); + iOutBuffer = NULL; + } + + if (iScratchBuffer) + { + User::Free(iScratchBuffer); + iScratchBuffer = NULL; + } + } + +// ----------------------------------------------------------------------------- +// CRateConverter::InitL +// Initialize the rate converter +// ----------------------------------------------------------------------------- +// +TBool CRateConverter::InitL(TInt aInputBufferSize) + { + PRINT((_L("CRateConverter::InitL() In"))); + + if (iConverter) + { + PRINT((_L("CRateConverter::InitL() Already initialized"))); + return EFalse; + } + + // Check that the input and output are either mono or stereo + if ( ((iFromChannels != 1) && (iFromChannels != 2)) || + ((iToChannels != 1) && (iToChannels != 2)) ) + { + PRINT((_L("CRateConverter::InitL() Only mono and stereo are supported for input/output"))); + return EFalse; + } + + if (iFromSampleRate == iToSampleRate) + { + // No sample rate conversion needed so do only channel conversion + iInputBlockSize = iOuputBlockSize = aInputBufferSize; + + PRINT((_L("CRateConverter::InitL() Out"))); + return ETrue; + } + + if (!DoInitL(aInputBufferSize)) + { + return EFalse; + } + + // Allocate internal input buffer + iInBuffer = (TInt16**) User::AllocL(iChannels * sizeof(TInt16*)); + + for (TInt i = 0; i < iChannels; i++) + { + iInBuffer[i] = (TInt16*) User::AllocL(iInputBlockSize * sizeof(TInt16)); + } + + PRINT((_L("CRateConverter::InitL() Out"))); + return ETrue; + } + +// ----------------------------------------------------------------------------- +// CRateConverter::DoInitL +// Does internal initialization +// ----------------------------------------------------------------------------- +// +TBool CRateConverter::DoInitL(TInt aInputBufferSize) + { + iInputBlockSize = aInputBufferSize; + + // Supported direct conversions: + // + // 16000 -> 8000: /2 + // 24000 -> 8000: /3 + // + // 8000 -> 16000: *2 + // 32000 -> 16000: /2 + // 48000 -> 16000: /3 + // + // 16000 -> 48000: *3 + // 24000 -> 48000: *2 + // 32000 -> 48000: *3/2 + // 44100 -> 48000: *i + + // Try to use direct conversion + iConverter = RESAMPLER_RateConversionInputDrivenInt16::New(iFromSampleRate, iToSampleRate, iChannels); + + if (!iConverter) + { + // Direct conversion is not possible so multi phase conversion is needed + + // Conversions are done in the following order: + // (*i means 160/147 conversion) + // + // 11025 -> 8000: *i *2 /3 (three phase) + // 22050 -> 8000: *i /3 (two phase) + // 32000 -> 8000: /2 /2 (two phase) + // 44100 -> 8000: *i /3 /2 (three phase) + // 48000 -> 8000: /3 /2 (two phase) + // + // 11025 -> 16000: *2 *2 *i /3 (four phase) + // 22050 -> 16000: *2 *i /3 (three phase) + // 24000 -> 16000: *2 /3 (two phase) + // 44100 -> 16000: *i /3 (two phase) + // + // 8000 -> 48000: *3 *2 (two phase) + // 11025 -> 48000: *2 *2 *i (three phase) + // 22050 -> 48000: *2 *i (two phase) + + // Check the last phase in the chain and make the decision where the child should convert + if( ((iToSampleRate == 8000) && ((iFromSampleRate == 11025) || (iFromSampleRate == 22050))) || + (iToSampleRate == 16000) ) + { + // Last phase is /3 so the child converter needs to do + // conversion from iFromSampleRate to iToSampleRate*3 + + // Create the child converter + iChild = CRateConverter::NewL(iFromSampleRate, iToSampleRate * 3, iChannels, iChannels); + if (!iChild->DoInitL(aInputBufferSize)) + { + return EFalse; + } + + // Update sample rates and buffer sizes + iFromSampleRate = iToSampleRate * 3; + aInputBufferSize = iChild->GetOutputBufferSize(); + + // Try to create our converter + iConverter = RESAMPLER_RateConversionInputDrivenInt16::New(iFromSampleRate, iToSampleRate, iChannels); + if (!iConverter) + { + return EFalse; + } + } + else if( (iToSampleRate == 8000) ) + { + // Last phase is /2 so the child converter needs to do + // conversion from iFromSampleRate to iToSampleRate*2 + + // Create the child converter + iChild = CRateConverter::NewL(iFromSampleRate, iToSampleRate * 2, iChannels, iChannels); + if (!iChild->DoInitL(aInputBufferSize)) + { + return EFalse; + } + + // Update sample rates and buffer sizes + iFromSampleRate = iToSampleRate * 2; + aInputBufferSize = iChild->GetOutputBufferSize(); + + // Try to create our converter + iConverter = RESAMPLER_RateConversionInputDrivenInt16::New(iFromSampleRate, iToSampleRate, iChannels); + if (!iConverter) + { + return EFalse; + } + } + else if( ((iToSampleRate == 48000) && ((iFromSampleRate == 11025) || (iFromSampleRate == 22050))) ) + { + // Last phase is *i so the child converter needs to do + // conversion from iFromSampleRate to 44100 + + // Create the child converter + iChild = CRateConverter::NewL(iFromSampleRate, 44100, iChannels, iChannels); + if (!iChild->DoInitL(aInputBufferSize)) + { + return EFalse; + } + + // Update sample rates and buffer sizes + iFromSampleRate = 44100; + aInputBufferSize = iChild->GetOutputBufferSize(); + + // Try to create our converter + iConverter = RESAMPLER_RateConversionInputDrivenInt16::New(iFromSampleRate, iToSampleRate, iChannels); + if (!iConverter) + { + return EFalse; + } + } + else if( ((iFromSampleRate == 11025) && ((iToSampleRate == 24000) || (iToSampleRate == 44100))) || + ((iFromSampleRate == 8000) && (iToSampleRate == 48000)) ) + { + // Last phase is *2 so the child converter needs to do + // conversion from iFromSampleRate to iToSampleRate/2 + + // Create the child converter + iChild = CRateConverter::NewL(iFromSampleRate, iToSampleRate / 2, iChannels, iChannels); + if (!iChild->DoInitL(aInputBufferSize)) + { + return EFalse; + } + + // Update sample rates and buffer sizes + iFromSampleRate = iToSampleRate / 2; + aInputBufferSize = iChild->GetOutputBufferSize(); + + // Try to create our converter + iConverter = RESAMPLER_RateConversionInputDrivenInt16::New(iFromSampleRate, iToSampleRate, iChannels); + if (!iConverter) + { + return EFalse; + } + } + else + { + // We don't know how to convert, probably this is an unsupported conversion + PRINT((_L("CRateConverter::DoInitL() Can not convert from %d to %d"), iFromSampleRate, iToSampleRate)); + return EFalse; + } + } + + if (!iConverter->InitInputDriven()) + { + PRINT((_L("CRateConverter::InitL() Failed to initialize converter"))); + return EFalse; + } + + // Set scratch memory buffer for converter + size_t scratchBufferSize = iConverter->ScratchMemoryNeedInputDriven(aInputBufferSize); + + if (scratchBufferSize == 0) + { + PRINT((_L("CRateConverter::InitL() Scratch buffer size is too big"))); + return EFalse; + } + + iScratchBuffer = (TInt8*) User::AllocL(scratchBufferSize); + iConverter->SetScratchBufferInputDriven((char *)iScratchBuffer); + + iOuputBlockSize = iConverter->MaxOutputSampleCount(aInputBufferSize); + + // Allocate internal output buffer + iOutBuffer = (TInt16**) User::AllocL(iChannels * sizeof(TInt16*)); + + for (TInt i = 0; i < iChannels; i++) + { + iOutBuffer[i] = (TInt16*) User::AllocL(iOuputBlockSize * sizeof(TInt16)); + } + + iConverter->SetQualityInputDriven(RESAMPLER_RATE_CONVERSION_QUALITY_STANDARD); + + PRINT((_L("CRateConverter::DoInitL() Convert %d -> %d Hz, %d -> %d channels"), iFromSampleRate, iToSampleRate, iFromChannels, iToChannels)); + + PRINT((_L("CRateConverter::DoInitL() Input buffer %d, Output buffer %d"), iInputBlockSize, iOuputBlockSize)); + + return ETrue; + } + +// ----------------------------------------------------------------------------- +// CRateConverter::ConvertBufferL +// Does rate and channel conversion for given buffer +// ----------------------------------------------------------------------------- +// +TInt CRateConverter::ConvertBufferL(TInt16* aInput, TInt16* aOutput, TInt aInputSampleCount) + { + if (iFromSampleRate == iToSampleRate) + { + // No sample rate conversion needed + if (iFromChannels == iToChannels) + { + // No channel conversion needed either so copy input directly to output + Mem::Copy(aOutput, aInput, aInputSampleCount * 2 * iFromChannels); + } + else if (iFromChannels == 2) + { + // Convert stereo to mono + for (TInt i = 0; i < aInputSampleCount; ++i) + { + // Average left and right samples + aOutput[i] = (aInput[2*i + 0] + aInput[2*i + 1]) >> 1; + } + } + else if (iToChannels == 2) + { + // Convert mono to stereo + for (TInt i = 0; i < aInputSampleCount; ++i) + { + // Duplicate left channel to right channel + aOutput[2*i + 0] = aInput[i]; + aOutput[2*i + 1] = aInput[i]; + } + } + + return aInputSampleCount; + } + + if (!iConverter) + { + PRINT((_L("CRateConverter::ConvertBufferL() Not initialized"))); + User::Leave(KErrNotReady); + } + + if (aInputSampleCount > iInputBlockSize) + { + PRINT((_L("CRateConverter::ConvertBufferL() Too many input samples"))); + User::Leave(KErrArgument); + } + + // Copy to input buffers and do channel conversion if needed + if (iChannels == 2) + { + // Both channels are stereo so copy both channels to own buffers + for (TInt i = 0; i < aInputSampleCount; ++i) + { + iInBuffer[0][i] = aInput[2*i + 0]; + iInBuffer[1][i] = aInput[2*i + 1]; + } + } + else if (iFromChannels == 2) + { + // Source is stereo so convert stereo to mono + for (TInt i = 0; i < aInputSampleCount; ++i) + { + // Average left and right samples + iInBuffer[0][i] = (aInput[2*i + 0] + aInput[2*i + 1]) >> 1; + } + } + else + { + // Source is mono so copy it directly + Mem::Copy(iInBuffer[0], aInput, aInputSampleCount * 2); + } + + TInt outputSampleCount = DoConvertL(iInBuffer, aInputSampleCount); + + // Copy to output buffers and do channel conversion if needed + if (iChannels == 2) + { + // Both channels are stereo so copy both channels to own buffers + for (TInt i = 0; i < outputSampleCount; ++i) + { + aOutput[2*i + 0] = iOutBuffer[0][i]; + aOutput[2*i + 1] = iOutBuffer[1][i]; + } + } + else if (iToChannels == 2) + { + // Ouput is stereo so convert mono to stereo + for (TInt i = 0; i < outputSampleCount; ++i) + { + // Duplicate left channel to right channel + aOutput[2*i + 0] = iOutBuffer[0][i]; + aOutput[2*i + 1] = iOutBuffer[0][i]; + } + } + else + { + // Output is mono so copy it directly + Mem::Copy(aOutput, iOutBuffer[0], outputSampleCount * 2); + } + + PRINT((_L("CRateConverter::ConvertBufferL() Output %d samples"), outputSampleCount)); + + return outputSampleCount; + } + +// ----------------------------------------------------------------------------- +// CRateConverter::DoConvertL +// Does the actual conversion +// ----------------------------------------------------------------------------- +// +TInt CRateConverter::DoConvertL(TInt16** aInput, TInt aInputSampleCount) + { + if (iChild) + { + // If we have a child then we need to do a multi phase conversion + TInt tempSampleCount = iChild->DoConvertL(aInput, aInputSampleCount); + + // Get pointer to child's output and use it as an input + TInt16** tempBuf = iChild->GetOutputBuffer(); + + return iConverter->ProcessFromInput(iOutBuffer, tempBuf, tempSampleCount); + } + else + { + // Otherwise process directly from input to output + return iConverter->ProcessFromInput(iOutBuffer, aInput, aInputSampleCount); + } + } + +