--- 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 <string.h>
-
-
-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;
-}
-
-