diff -r 951a5db380a0 -r d87d32eab1a9 videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_44_to_48_int16.cpp --- a/videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_44_to_48_int16.cpp Fri Jan 29 14:08:33 2010 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,352 +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_44_to_48_int16.h" -#include "resampler_clip.h" -#include "resampler_sinc_conv_44_to_48_tables_economy.h" -#include "resampler_sinc_conv_44_to_48_tables_standard.h" -#include "resampler_sinc_conv_44_to_48_tables_premium.h" - -#include - -#include "resampler_sinc_conv_filter_int16.h" - -/* - * The amount of zero crossings in positive or negative - * side of the sinc function. Because of filter symmetry - * the amount of filter taps used in convolution is - * zero crossings * 2. - */ -static const int LC_MAX_ZERO_CROSSINGS = RESAMPLER_44_TO_48_ZERO_CROSSINGS_PREMIUM; - -static const int LC_BUFFER_ACCESS_OUTPUT = LC_MAX_ZERO_CROSSINGS; - -/* - * The number of filters needed in 44.1 to 48 kHz sinc interpolation - * sampling rate conversion. Filter symmetry is utilized. - */ -static const int LC_FILTER_COUNT = 160; - -/* - * Calculated as 160-147. - * 147/160 is the smallest ratio of 44100/48000. - * Used as a hop increment in the filter table defined below. - */ -static const int LC_MATRIX_HOP_SIZE = 13; - -/* - * This constant is calculated as ceil(2^23/160). - * and used in InSamplesNeeded() method to - * avoid the division by 160. The result of the multiplication - * has to be shifted afterwards by 23 bits right. - */ -static const int LC_SAMPLE_COUNT_MULT = 52429; - -/** Do not remove! LC_MAX_BLOCK_SIZE used in assert! - */ -#if 0 -/* - * M_INPUT_COUNT_MULT * (6289*13+160) = 4294826393 (0xfffdd999). - * 6289 is the largest number that fits 32 bits in the - * input sample count multiplication method. - */ -static const int LC_MAX_BLOCK_SIZE = 6289; -#endif // 0 - - -RESAMPLER_SincConv44To48Int16::RESAMPLER_SincConv44To48Int16(int channelCount) : -m_memBuffers(0), -m_scratchBuffer(0), -m_channelCount(channelCount), -m_blockSize(0), -m_channelEnabled(0), -m_inputSamples(0), -m_index1(LC_FILTER_COUNT), -m_index2(0), -m_zeroCrossings(RESAMPLER_44_TO_48_ZERO_CROSSINGS_STANDARD), -m_filterMatrix(RESAMPLER_44_TO_48_FILTERS_STANDARD) -{ -} - - -RESAMPLER_SincConv44To48Int16::~RESAMPLER_SincConv44To48Int16() -{ - DeInit(); -} - -bool RESAMPLER_SincConv44To48Int16::InitInputDriven() -{ - return Init(); -} - - -bool RESAMPLER_SincConv44To48Int16::InitOutputDriven() -{ - return Init(); -} - -bool RESAMPLER_SincConv44To48Int16::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_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_MAX_ZERO_CROSSINGS * 2]; - if (!m_memBuffers[i]) - { - DeInit(); - return false; - } - memset(m_memBuffers[i], 0, sizeof(int16) * (LC_MAX_ZERO_CROSSINGS * 2)); - } - - return true; -} - -void -RESAMPLER_SincConv44To48Int16::DeInit() -{ - if (m_channelCount) - { - for (int i = 0; i < m_channelCount; i++) - { - delete [] m_memBuffers[i]; - } - delete [] m_memBuffers; - delete [] m_channelEnabled; - } -} - -bool -RESAMPLER_SincConv44To48Int16::SetQualityInputDriven(int mode) -{ - return SetQualityOutputDriven(mode); -} - -bool -RESAMPLER_SincConv44To48Int16::SetQualityOutputDriven(int mode) -{ - switch (mode) - { - case RESAMPLER_RATE_CONVERSION_QUALITY_ECONOMY: - m_zeroCrossings = RESAMPLER_44_TO_48_ZERO_CROSSINGS_ECONOMY; - m_filterMatrix = RESAMPLER_44_TO_48_FILTERS_ECONOMY; - break; - case RESAMPLER_RATE_CONVERSION_QUALITY_STANDARD: - m_zeroCrossings = RESAMPLER_44_TO_48_ZERO_CROSSINGS_STANDARD; - m_filterMatrix = RESAMPLER_44_TO_48_FILTERS_STANDARD; - break; - case RESAMPLER_RATE_CONVERSION_QUALITY_PREMIUM: - m_zeroCrossings = RESAMPLER_44_TO_48_ZERO_CROSSINGS_PREMIUM; - m_filterMatrix = RESAMPLER_44_TO_48_FILTERS_PREMIUM; - break; - default: - return false; - } - return true; -} - -void -RESAMPLER_SincConv44To48Int16::EnableChannelInputDriven(int channel) -{ - EnableChannelOutputDriven(channel); -} - - -void -RESAMPLER_SincConv44To48Int16::DisableChannelInputDriven(int channel) -{ - DisableChannelOutputDriven(channel); -} - - -void -RESAMPLER_SincConv44To48Int16::EnableChannelOutputDriven(int channel) -{ - m_channelEnabled[channel] = true; -} - - -void -RESAMPLER_SincConv44To48Int16::DisableChannelOutputDriven(int channel) -{ - m_channelEnabled[channel] = false; -} - -size_t -RESAMPLER_SincConv44To48Int16::ScratchMemoryNeedInputDriven(int maxInputBlockSize) const -{ - /** 6289 == LC_MAX_BLOCK_SIZE - */ - if (maxInputBlockSize > 6289 * 44100.0/48000.0) - { - return 0; - } - - return sizeof(int16) * (LC_MAX_ZERO_CROSSINGS * 2 + maxInputBlockSize); -} - -void -RESAMPLER_SincConv44To48Int16::SetScratchBufferInputDriven(char *buffer) -{ - m_scratchBuffer = (int16 *)buffer; -} - -size_t -RESAMPLER_SincConv44To48Int16::ScratchMemoryNeedOutputDriven(int maxOutputBlockSize) const -{ - int blockSize = (int)((maxOutputBlockSize * 44100.0/48000.0) + 1); - - return ScratchMemoryNeedInputDriven(blockSize); -} - -void -RESAMPLER_SincConv44To48Int16::SetScratchBufferOutputDriven(char *buffer) -{ - m_scratchBuffer = (int16 *)buffer; -} - - - -int -RESAMPLER_SincConv44To48Int16::MaxInputSampleCount(int outSamples) const -{ - return (int)((outSamples * (44100.0 / 48000.0)) + 1); -} - - -int -RESAMPLER_SincConv44To48Int16::InSamplesNeeded(int outSamples) -{ - m_inputSamples = outSamples - ((LC_SAMPLE_COUNT_MULT * (outSamples*13+m_index2)) >> 23); - - return m_inputSamples; -} - -int -RESAMPLER_SincConv44To48Int16::MaxOutputSampleCount(int inSamples) const -{ - return (int)(inSamples * 160.0 / 147.0 + 1.0); -} - - -int RESAMPLER_SincConv44To48Int16::ProcessFromInput(int16 *outputBuffers[], - int16 *inputBuffers[], - int inSamples) -{ - int outSamples = (int)((inSamples * 160.0 + m_index2) / 147.0); - m_inputSamples = inSamples; - return ProcessToOutput(outputBuffers, inputBuffers, outSamples); -} - -int -RESAMPLER_SincConv44To48Int16::ProcessToOutput(int16 *outputBuffers[], - int16 *inputBuffers[], - int outSamples) -{ - static const int FILTER_LENGTH = 2 * LC_MAX_ZERO_CROSSINGS; - int i, j; - int index1 = m_index1; - int index2 = m_index2; - - for (i = 0; i < m_channelCount; i++) - { - if (!m_channelEnabled[i]) - { - break; - } - - int16 *tempBuf = m_scratchBuffer; - int16 *outBuf = outputBuffers[i]; - index1 = m_index1; /* 160 SRC filter number */ - index2 = m_index2; /* 0 */ - - int state = 0; - - memcpy(m_scratchBuffer, - m_memBuffers[i], - FILTER_LENGTH * sizeof(int16)); - - // Read samples into memory - memcpy(tempBuf + FILTER_LENGTH, - inputBuffers[i], - m_inputSamples * sizeof(int16)); - - // Do band limited interpolation and set the result into - // every index in the output buffer. - for (j = 0; j < outSamples; j++) - { - index1 -= LC_MATRIX_HOP_SIZE; /* -13 */ - index2 += LC_MATRIX_HOP_SIZE; /* +13 */ - - if (index1 <= 0) - { - index1 += LC_FILTER_COUNT; /* +160 */ - index2 -= LC_FILTER_COUNT; /* -160 */ - state++; - } - - /*lint -e{662} */ - const int16 *filterPtr1 = m_filterMatrix + index1 * m_zeroCrossings; - const int16 *filterPtr2 = m_filterMatrix + index2 * m_zeroCrossings; - - int32 newSample = - RESAMPLER_SincConvFilterInt16(tempBuf + LC_BUFFER_ACCESS_OUTPUT - state + j, - filterPtr1, - filterPtr2, - m_zeroCrossings); - - // round and shift down - outBuf[j] = (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)); - } - - m_index1 = index1; - m_index2 = index2; - - return outSamples; -} -