videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_one_to_two_int16.cpp
--- a/videoeditorengine/audioeditorengine/resampler/src/resampler_sinc_conv_one_to_two_int16.cpp Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,262 +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_one_to_two_int16.h"
-#include "resampler_clip.h"
-#include "resampler_sinc_conv_one_to_two_tables_standard.h"
-
-#include <string.h>
-
-#include "resampler_sinc_conv_one_to_two_int16.inl"
-
-static const int LC_ZERO_CROSSINGS = RESAMPLER_ONE_TO_TWO_ZERO_CROSSINGS_STANDARD; /* Needs to be divisible by two */
-
-
-RESAMPLER_SincConvOneToTwoInt16::RESAMPLER_SincConvOneToTwoInt16(int channelCount) :
-m_memBuffers(0),
-m_scratchBuffer(0),
-m_filter(RESAMPLER_ONE_TO_TWO_FILTERS_STANDARD),
-m_channelCount(channelCount),
-m_blockSize(0),
-m_channelEnabled(0),
-m_state(0)
-{
-}
-
-
-RESAMPLER_SincConvOneToTwoInt16::~RESAMPLER_SincConvOneToTwoInt16()
-{
- DeInit();
-}
-
-
-bool RESAMPLER_SincConvOneToTwoInt16::InitInputDriven()
-{
- return Init();
-}
-
-
-bool RESAMPLER_SincConvOneToTwoInt16::InitOutputDriven()
-{
- return Init();
-}
-
-
-bool RESAMPLER_SincConvOneToTwoInt16::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_SincConvOneToTwoInt16::DeInit()
-{
- if (m_channelCount)
- {
- for (int i = 0; i < m_channelCount; i++)
- {
- delete [] m_memBuffers[i];
- }
- delete [] m_memBuffers;
- delete [] m_channelEnabled;
- }
-}
-
-
-void RESAMPLER_SincConvOneToTwoInt16::EnableChannel(int channel)
-{
- m_channelEnabled[channel] = true;
-}
-
-
-void RESAMPLER_SincConvOneToTwoInt16::DisableChannel(int channel)
-{
- m_channelEnabled[channel] = false;
-}
-
-
-size_t
-RESAMPLER_SincConvOneToTwoInt16::ScratchMemoryNeedInputDriven(int maxInputBlockSize) const
-{
- return sizeof(int16) * (LC_ZERO_CROSSINGS * 2 + maxInputBlockSize);
-}
-
-
-void
-RESAMPLER_SincConvOneToTwoInt16::SetScratchBufferInputDriven(char *buffer)
-{
- m_scratchBuffer = (int16 *)buffer;
-}
-
-
-int RESAMPLER_SincConvOneToTwoInt16::MaxOutputSampleCount(int inSamples) const
-{
- return 2 * inSamples;
-}
-
-
-int RESAMPLER_SincConvOneToTwoInt16::ProcessFromInput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int inSamples)
-{
- int outSamples(2 * inSamples + m_state);
- return ProcessToOutput(outputBuffers, inputBuffers, outSamples);
-}
-
-
-size_t
-RESAMPLER_SincConvOneToTwoInt16::ScratchMemoryNeedOutputDriven(int maxOutputBlockSize) const
-{
- return ScratchMemoryNeedInputDriven((maxOutputBlockSize + 1) >> 1);
-}
-
-
-void
-RESAMPLER_SincConvOneToTwoInt16::SetScratchBufferOutputDriven(char *buffer)
-{
- m_scratchBuffer = (int16 *)buffer;
-}
-
-
-int RESAMPLER_SincConvOneToTwoInt16::MaxInputSampleCount(int outSamples) const
-{
- return (outSamples + 1) >> 1;
-}
-
-
-int RESAMPLER_SincConvOneToTwoInt16::InSamplesNeeded(int outSamples)
-{
- int inSamples( (outSamples >> 1) + (outSamples & 1) * (1 - m_state) );
-
- return inSamples;
-}
-
-
-int RESAMPLER_SincConvOneToTwoInt16::ProcessToOutput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int outSamples)
-{
- static const int FILTER_LENGTH = 2 * LC_ZERO_CROSSINGS;
-
- int i, j, k;
- int oldState = m_state;
- int newState = (oldState + outSamples) & 1;
-
- for (i = 0; i < m_channelCount; i++)
- {
- if (!m_channelEnabled[i])
- {
- break;
- }
-
- int16 *tempBuf = m_scratchBuffer;
- const int16 *inBuf = inputBuffers[i];
- int16 *outBuf = outputBuffers[i];
-
- memcpy(m_scratchBuffer, m_memBuffers[i], FILTER_LENGTH * sizeof(int16));
-
- // Read samples into the memory buffer and
- // copy samples into every second index of output buffer.
- for (j = 0, k = oldState; k < outSamples; j++, k+=2)
- {
- int16 inputSample(inBuf[j]);
- tempBuf[j + FILTER_LENGTH - 1 + oldState] = inputSample;
- outBuf[k] = tempBuf[j + LC_ZERO_CROSSINGS - 1 + oldState];
- }
- int inSamples = j;
-
- // Do band-limited interpolation and set the result into
- // every second index in the output buffer.
-#ifdef RESAMPLER_SINC_CONV_ONE_TO_TWO_DUAL_FILTERING
- for (j = 0, k = 1 - oldState; k < outSamples; j+=2, k+=4)
- {
- int newSample1(0);
- int newSample2(0);
-
- RESAMPLER_SincConvOneToTwoFilterDualInt16(newSample1,
- newSample2,
- tempBuf + LC_ZERO_CROSSINGS + j,
- m_filter,
- LC_ZERO_CROSSINGS);
- // Round, shift down, and clip to 16 bits
- outBuf[k] = (int16)RESAMPLER_Clip16((newSample1 + 16384) >> 15);
- if (k + 2 < outSamples)
- {
- outBuf[k+2] = (int16)RESAMPLER_Clip16((newSample2 + 16384) >> 15);
- }
- }
-#else
- for (j = 0, k = 1 - oldState; k < outSamples; j++, k+=2)
- {
- int32 newSample =
- RESAMPLER_SincConvOneToTwoFilterInt16(tempBuf + LC_ZERO_CROSSINGS + j,
- m_filter,
- LC_ZERO_CROSSINGS);
- // Round, shift down, and clip to 16 bits
- outBuf[k] = (int16)RESAMPLER_Clip16((newSample + 16384) >> 15);
- }
-#endif
-
- // Copy the newest samples to the beginning of the buffer
- memcpy(m_memBuffers[i],
- tempBuf + inSamples + oldState - newState,
- (FILTER_LENGTH - 1 + newState) * sizeof(int16));
- }
-
- // Update state according to even or odd amount of output samples.
- m_state = newState;
-
- return outSamples;
-}