videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_three_to_one_int16.cpp
--- a/videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_three_to_one_int16.cpp Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,246 +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_three_to_one_int16.h"
-#include "resampler_clip.h"
-#include "resampler_sinc_conv_three_to_one_tables_standard.h"
-#include "resampler_sinc_conv_filter_three_to_one_int16.h"
-
-
-#include <string.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_COEFF_COUNT = RESAMPLER_THREE_TO_ONE_COEFF_COUNT_STANDARD;
-
-static const int LC_BUFFER_ACCESS_OUTPUT = LC_MAX_COEFF_COUNT - 1;
-
-
-RESAMPLER_SincConvThreeToOneInt16::RESAMPLER_SincConvThreeToOneInt16(int channelCount) :
-m_memBuffers(0),
-m_scratchBuffer(0),
-m_channelCount(channelCount),
-m_blockSize(0),
-m_channelEnabled(0),
-m_state(0),
-m_coeffCount(RESAMPLER_THREE_TO_ONE_COEFF_COUNT_STANDARD),
-m_filterMatrix(RESAMPLER_THREE_TO_ONE_FILTERS_STANDARD)
-{
-}
-
-
-RESAMPLER_SincConvThreeToOneInt16::~RESAMPLER_SincConvThreeToOneInt16()
-{
- DeInit();
-}
-
-bool RESAMPLER_SincConvThreeToOneInt16::InitInputDriven()
-{
- return Init();
-}
-
-bool RESAMPLER_SincConvThreeToOneInt16::InitOutputDriven()
-{
- return Init();
-}
-
-bool
-RESAMPLER_SincConvThreeToOneInt16::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_COEFF_COUNT * 2 - 1];
- if (!m_memBuffers[i])
- {
- DeInit();
- return false;
- }
- memset(m_memBuffers[i], 0, sizeof(int16) * (LC_MAX_COEFF_COUNT * 2 - 1));
- }
-
- return true;
-}
-
-void
-RESAMPLER_SincConvThreeToOneInt16::DeInit()
-{
- if (m_channelCount)
- {
- for (int i = 0; i < m_channelCount; i++)
- {
- delete [] m_memBuffers[i];
- }
- delete [] m_memBuffers;
- delete [] m_channelEnabled;
- }
-}
-
-
-void
-RESAMPLER_SincConvThreeToOneInt16::EnableChannel(int channel)
-{
- m_channelEnabled[channel] = true;
-}
-
-void
-RESAMPLER_SincConvThreeToOneInt16::DisableChannel(int channel)
-{
- m_channelEnabled[channel] = false;
-}
-
-size_t
-RESAMPLER_SincConvThreeToOneInt16::ScratchMemoryNeedInputDriven(int maxInputBlockSize) const
-{
- return sizeof(int16) * ((LC_MAX_COEFF_COUNT * 2 - 1) + maxInputBlockSize);
-}
-
-void
-RESAMPLER_SincConvThreeToOneInt16::SetScratchBufferInputDriven(char *buffer)
-{
- m_scratchBuffer = (int16 *)buffer;
-}
-
-size_t
-RESAMPLER_SincConvThreeToOneInt16::ScratchMemoryNeedOutputDriven(int maxOutputBlockSize) const
-{
- int blockSize = 3 * maxOutputBlockSize;
-
- return ScratchMemoryNeedInputDriven(blockSize);
-}
-
-void
-RESAMPLER_SincConvThreeToOneInt16::SetScratchBufferOutputDriven(char *buffer)
-{
- m_scratchBuffer = (int16 *)buffer;
-}
-
-
-int
-RESAMPLER_SincConvThreeToOneInt16::MaxOutputSampleCount(int inSamples) const
-{
- return ( inSamples + 2 ) / 3;
-}
-
-int
-RESAMPLER_SincConvThreeToOneInt16::MaxInputSampleCount(int outSamples) const
-{
- return 3 * outSamples;
-}
-
-
-int
-RESAMPLER_SincConvThreeToOneInt16::InSamplesNeeded(int outSamples)
-{
- return 3 * outSamples;
-}
-
-
-int
-RESAMPLER_SincConvThreeToOneInt16::ProcessToOutput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int outSamples)
-{
- int inSamples( 3 * outSamples );
-
- return ProcessFromInput(outputBuffers, inputBuffers, inSamples);
-}
-
-int
-RESAMPLER_SincConvThreeToOneInt16::ProcessFromInput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int inSamples)
-{
- static const int FILTER_LENGTH = LC_MAX_COEFF_COUNT * 2 - 1;
- int i, j;
- int state = m_state;
- int outSamples = (inSamples + state) / 3;
-
- for (i = 0; i < m_channelCount; i++)
- {
- if (!m_channelEnabled[i])
- {
- break;
- }
-
- int16 *tempBuf = m_scratchBuffer;
- int16 *outBuf = outputBuffers[i];
- state = m_state;
-
- memcpy(m_scratchBuffer,
- m_memBuffers[i],
- FILTER_LENGTH * sizeof(int16));
-
- // Read samples into memory
- memcpy(tempBuf + FILTER_LENGTH,
- inputBuffers[i],
- inSamples * sizeof(int16));
-
- tempBuf += LC_BUFFER_ACCESS_OUTPUT - state;
-
- for (j = 0; j < outSamples; j++)
- {
- int32 newSample =
- RESAMPLER_SincConvFilterThreeToOneInt16(tempBuf,
- m_filterMatrix,
- m_coeffCount);
- tempBuf += 3;
-
- // 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 + inSamples,
- FILTER_LENGTH * sizeof(int16));
- }
-
- m_state = (state + inSamples) % 3;
-
- return outSamples;
-}
-