diff -r 951a5db380a0 -r d87d32eab1a9 videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_two_to_three_int16.cpp --- a/videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_two_to_three_int16.cpp Fri Jan 29 14:08:33 2010 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,278 +0,0 @@ -/* -* 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 "resampler_sinc_conv_two_to_three_int16.h" -#include "resampler_clip.h" -#include "resampler_sinc_conv_two_to_three_tables_standard.h" - -#include "resampler_sinc_conv_two_to_three_int16.inl" - - -#include - - -static const int LC_ZERO_CROSSINGS = RESAMPLER_TWO_TO_THREE_ZERO_CROSSINGS_STANDARD; -static const int LC_MOD3[6] = { 0, 1, 2, 0, 1, 2 }; - - -RESAMPLER_SincConvTwoToThreeInt16::RESAMPLER_SincConvTwoToThreeInt16(int channelCount) : -m_memBuffers(0), -m_scratchBuffer(0), -m_filter1(RESAMPLER_TWO_TO_THREE_FILTER1_STANDARD), -m_filter2(RESAMPLER_TWO_TO_THREE_FILTER2_STANDARD), -m_channelCount(channelCount), -m_blockSize(0), -m_channelEnabled(0), -m_inputSamples(0), -m_state(2) -{ -} - - -RESAMPLER_SincConvTwoToThreeInt16::~RESAMPLER_SincConvTwoToThreeInt16() -{ - DeInit(); -} - - -bool RESAMPLER_SincConvTwoToThreeInt16::InitInputDriven() -{ - return Init(); -} - - -bool RESAMPLER_SincConvTwoToThreeInt16::InitOutputDriven() -{ - return Init(); -} - - -/* -* This function must be called before using the converter. -* This function reserves memory for ring buffers and -* prepares the ring buffer indexing. -*/ -bool RESAMPLER_SincConvTwoToThreeInt16::Init() -{ - int i = 0; - - m_memBuffers = new int16 *[m_channelCount]; - if (!m_memBuffers) - { - return false; - } - - for (i = 0; i < m_channelCount; i++) - { - m_memBuffers[i] = 0; - } - - m_channelCount = m_channelCount; - - m_channelEnabled = new bool[m_channelCount]; - if (!m_channelEnabled) - { - DeInit(); - return false; - } - for (i = 0; i < m_channelCount; i++) - { - m_channelEnabled[i] = true; - } - - for (i = 0; i < m_channelCount; i++) - { - m_memBuffers[i] = new int16[LC_ZERO_CROSSINGS * 2]; - if (!m_memBuffers[i]) - { - DeInit(); - return false; - } - memset(m_memBuffers[i], 0, sizeof(int16) * (LC_ZERO_CROSSINGS * 2)); - } - - return true; -} - - -void RESAMPLER_SincConvTwoToThreeInt16::DeInit() -{ - if (m_channelCount) - { - for (int i = 0; i < m_channelCount; i++) - { - delete [] m_memBuffers[i]; - } - delete [] m_memBuffers; - delete [] m_channelEnabled; - } -} - - -void RESAMPLER_SincConvTwoToThreeInt16::EnableChannel(int channel) -{ - m_channelEnabled[channel] = true; -} - - -void RESAMPLER_SincConvTwoToThreeInt16::DisableChannel(int channel) -{ - m_channelEnabled[channel] = false; -} - - -int RESAMPLER_SincConvTwoToThreeInt16::MaxOutputSampleCount(int inSamples) const -{ - return 3 * inSamples / 2 + 1; -} - - -int RESAMPLER_SincConvTwoToThreeInt16::ProcessFromInput(int16 *outputBuffers[], - int16 *inputBuffers[], - int inSamples) -{ - int outSamples( (3*inSamples + 2 - m_state) / 2 ); - m_inputSamples = inSamples; - - return ProcessToOutput(outputBuffers, inputBuffers, outSamples); -} - - -size_t -RESAMPLER_SincConvTwoToThreeInt16::ScratchMemoryNeedOutputDriven(int maxOutputBlockSize) const -{ - return ScratchMemoryNeedInputDriven((2*maxOutputBlockSize + 2) / 3); -} - - -void -RESAMPLER_SincConvTwoToThreeInt16::SetScratchBufferOutputDriven(char *buffer) -{ - m_scratchBuffer = (int16 *)buffer; -} - -size_t -RESAMPLER_SincConvTwoToThreeInt16::ScratchMemoryNeedInputDriven(int maxInputBlockSize) const -{ - return sizeof(int16) * (LC_ZERO_CROSSINGS * 2 + maxInputBlockSize); -} - - -void -RESAMPLER_SincConvTwoToThreeInt16::SetScratchBufferInputDriven(char *buffer) -{ - m_scratchBuffer = (int16 *)buffer; -} - -int RESAMPLER_SincConvTwoToThreeInt16::MaxInputSampleCount(int outSamples) const -{ - return (2*outSamples+2)/3; -} - - -/* -* This function returns the value, which is given as -* a parameter to the nextSamplesOut() function. This -* function must be called every time before calling -* nextSamplesOut. -*/ -int RESAMPLER_SincConvTwoToThreeInt16::InSamplesNeeded(int outSamples) -{ - m_inputSamples = (2 * outSamples + m_state) / 3; - return m_inputSamples; -} - - -int RESAMPLER_SincConvTwoToThreeInt16::ProcessToOutput(int16 *outputBuffers[], - int16 *inputBuffers[], - int outSamples) -{ - static const int FILTER_LENGTH = 2 * LC_ZERO_CROSSINGS; - int i, j, k; - - int bufReadHead1 = LC_ZERO_CROSSINGS + m_state; - int bufReadHead2 = LC_ZERO_CROSSINGS + (m_state == 1 ? 1 : 0); - int bufReadHead3 = LC_ZERO_CROSSINGS + (m_state != 1 ? 1 : 0); - - for (i = 0; i < m_channelCount; i++) - { - if (!m_channelEnabled[i]) - { - break; - } - - int16 *tempBuf = m_scratchBuffer; - int16 *outBuf = outputBuffers[i]; - - memcpy(m_scratchBuffer, m_memBuffers[i], FILTER_LENGTH * sizeof(int16)); - - memcpy(tempBuf + FILTER_LENGTH, - inputBuffers[i], - m_inputSamples * sizeof(int16)); - - // copy every second sample into every third index of output buffer. - tempBuf = m_scratchBuffer + bufReadHead1; - for (j = 0, k = m_state; k < outSamples; j+=2, k+=3) - { - outBuf[k] = tempBuf[j]; - } - - // Do band limited interpolation and set the result into - // every third index in the output buffer. - tempBuf = m_scratchBuffer + bufReadHead2; - for (j = 0, k = LC_MOD3[m_state+1]; k < outSamples; j += 2, k += 3) - { - // Note that the filters are reversed - - int32 newSample = RESAMPLER_SincConvTwoToThreeFilterInt16(tempBuf + j, - m_filter2, - m_filter1, - LC_ZERO_CROSSINGS); - - // round and shift down - outBuf[k] = (int16)RESAMPLER_Clip16((newSample + 16384) >> 15); - } - - // Do band limited interpolation and set the result into - // every third index in the output buffer. - tempBuf = m_scratchBuffer + bufReadHead3; - for (j = 0, k = LC_MOD3[m_state+2]; k < outSamples; j += 2, k += 3) - { - int32 newSample = RESAMPLER_SincConvTwoToThreeFilterInt16(tempBuf + j, - m_filter1, - m_filter2, - LC_ZERO_CROSSINGS); - - // round and shift down - outBuf[k] = (int16)RESAMPLER_Clip16((newSample + 16384) >> 15); - } - - // Copy the newest samples to the beginning of the buffer - memcpy(m_memBuffers[i], - m_scratchBuffer + m_inputSamples, - FILTER_LENGTH * sizeof(int16)); - } - - // Update state according to amount of output samples. - m_state = LC_MOD3[m_state + (3 - (outSamples % 3))]; - - return outSamples; -} - -