videoeditorengine/audioeditorengine/resampler/inc/resampler_sinc_conv_two_to_three_int16.h
--- a/videoeditorengine/audioeditorengine/resampler/inc/resampler_sinc_conv_two_to_three_int16.h Fri Jan 29 14:08:33 2010 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,340 +0,0 @@
-#ifndef __RESAMPLER_SINC_CONV_TWO_TO_THREE_INT16_H__
-#define __RESAMPLER_SINC_CONV_TWO_TO_THREE_INT16_H__
-/*
-* 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_rate_conversion_input_driven_int16.h"
-#include "resampler_rate_conversion_output_driven_int16.h"
-
-/* Define this 1 to use code */
-
-
-
-
-/** @ingroup rate_conversion
-
- Converter class for upsampling 16-bit audio to 3/2
- times the source frequency
-
-
-*/
-
-class RESAMPLER_SincConvTwoToThreeInt16 : public RESAMPLER_RateConversionInputDrivenInt16,
- public RESAMPLER_RateConversionOutputDrivenInt16
-{
- friend class RESAMPLER_RateConversionInputDrivenInt16;
- friend class RESAMPLER_RateConversionOutputDrivenInt16;
-
-public:
-
- /** @name Destruction */
-
- //@{
-
- /** Destructor
- */
-
- virtual ~RESAMPLER_SincConvTwoToThreeInt16();
-
- //@}
-
- /** @name Query methods */
-
- //@{
-
- static bool RateSupported(float inRate, float outRate)
- { return (3*inRate == 2*outRate); }
-
- //@}
-
- /** @name Object lifetime methods */
-
- //@{
-
- /** Initializes the converter.
-
- This method initializes the sampling rate converter for input-driven
- operation.
-
- @return true if successful false otherwise
- */
-
- virtual bool InitInputDriven();
-
- /** Initializes the converter.
-
- This method initializes the sampling rate converter for output-driven
- operation.
-
- @return true if successful false otherwise
- */
-
- virtual bool InitOutputDriven();
-
- //@}
-
- /** @name Input-driven operation */
-
- //@{
-
- /** Enable one of the channels.
-
- This method is used to (re-)enable a rate conversion channel after it's
- been disabled. (All channels start in the enabled mode.) This is used to
- tell the algorithm that the channel must be properly processed, if the
- algorithm wants to take advantage of the optimization possibilities
- provided by the DisableInputDriven() method.
-
- @note The channel index MUST be valid, i.e., it has to be smaller than
- @c numChannels given at initialization time.
-
- @param[in] channel The index of the channel to be enabled.
- */
-
- virtual void EnableChannelInputDriven(int channel)
- { EnableChannel(channel); }
-
- /** Disable one of the channels.
-
- This method can be used to tell the algorithm that the output from a
- specific channel will not be used in subsequent operations, and the
- implementation may choose to optimize and leave the disabled channel
- unprocessed. However, the caller must always provide valid pointers for
- the actual processing methods for the case where it's difficult to
- actually disable memory access for the specific channel in an
- implementation.
-
- @note The channel index MUST be valid, i.e., it has to be smaller than
- @c numChannels given at initialization time.
-
- @param[in] channel The index of the channel to be enabled.
- */
-
- virtual void DisableChannelInputDriven(int channel)
- { DisableChannel(channel); }
-
- /** Query the scratch memory need of the converter.
-
- This method queries the amount of scratch memory the input driven converter
- needs to be able to handle in a single call to the processing functions.
-
- @param[in] maxInputBlockSize Maximum input blocksize
- @return memory need in bytes
- */
-
- virtual size_t ScratchMemoryNeedInputDriven(int maxInputBlockSize) const;
-
- /** Set scratch buffer for the converter
-
- This method sets scratch buffer needed by the converter when the converter is
- used in output driven mode. . The caller of this function is responsible of
- allocating enough memory.
-
- @param[in] *buffer pointer to the allocated buffer
- */
-
- virtual void SetScratchBufferInputDriven(char *buffer);
-
- /** Get the maximum number of output samples for a given input sample count
-
- This method returns the maximum number of output samples the converter
- can ever produce from a given number of input samples. The method assumes
- that the converter be used either input-driven or output-driven; the
- two modes should not be mixed.
-
- @param[in] inSamples Number of input samples
- @return Maximum number of output samples
- */
-
- virtual int MaxOutputSampleCount(int inSamples) const;
-
- /** Run the sampling rate conversion for a block of samples
-
- This method runs the actual sampling rate conversion. The pointer arrays
- have to contain valid pointers for numChannels channel data buffers. The
- output buffers must have space for MaxOutputSampleCount(inSamples) audio
- samples.
-
- @param[out] outputBuffers Pointer to output buffer array
- @param[in] inputBuffers Pointer to input buffer array
- @param[in] inSamples The number of input samples to process
- @return Number of output samples
- */
-
- virtual int ProcessFromInput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int inSamples);
-
- //@}
-
- /** @name Output-driven operation */
-
- //@{
-
- /** Enable one of the channels.
-
- This method is used to (re-)enable a rate conversion channel after it's
- been disabled. (All channels start in the enabled mode.) This is used to
- tell the algorithm that the channel must be properly processed, if the
- algorithm wants to take advantage of the optimization possibilities
- provided by the DisableInputDriven() method.
-
- @note The channel index MUST be valid, i.e., it has to be smaller than
- @c numChannels given at initialization time.
-
- @param[in] channel The index of the channel to be enabled.
- */
-
- virtual void EnableChannelOutputDriven(int channel)
- { EnableChannel(channel); }
-
- /** Disable one of the channels.
-
- This method can be used to tell the algorithm that the output from a
- specific channel will not be used in subsequent operations, and the
- implementation may choose to optimize and leave the disabled channel
- unprocessed. However, the caller must always provide valid pointers for
- the actual processing methods for the case where it's difficult to
- actually disable memory access for the specific channel in an
- implementation.
-
- @note The channel index MUST be valid, i.e., it has to be smaller than
- @c numChannels given at initialization time.
-
- @param[in] channel The index of the channel to be enabled.
- */
-
- virtual void DisableChannelOutputDriven(int channel)
- { DisableChannel(channel); }
-
- /** Get the maximum number of input samples needed.
-
- This method returns the maximum number of input samples needed
- for a given output sample count.
-
- @param[in] outSamples Number of output samples
- @return Maximum number of input samples
- */
-
- virtual int MaxInputSampleCount(int outSamples) const;
-
- /** Get the amount of samples needed for input.
-
- This method returns the amount of samples needed for converter input
- given the number of output samples. This method must be called before
- each call to the processing methods. It is a serious error to have
- \a outSamples greater than the value set with ScratchMemoryNeedOutputDriven().
-
- @param[in] outSamples Amount of samples the converter produces
- @return number of input samples needed
- */
-
- virtual int InSamplesNeeded(int outSamples);
- /** Query the scratch memory need of the converter.
-
- This method queries the amount of scratch memory the output driven converter
- needs to be able to handle in a single call to the processing functions.
-
- @param[in] maxOutputBlockSize Maximum output blocksize
- @return memory need in bytes
- */
-
- virtual size_t ScratchMemoryNeedOutputDriven(int maxOutputBlockSize) const;
-
- /** Set scratch buffer for the converter
-
- This method sets scratch buffer needed by the converter when then converter is
- used in output driven mode. The caller of this function is responsible of
- allocating enough memory.
-
- @param[in] *buffer pointer to the allocated buffer
- */
-
- virtual void SetScratchBufferOutputDriven(char *buffer);
-
-
- /** Run the sampling rate conversion for a block of samples
-
- This method does the sampling rate conversion. The pointer arrays
- have to contain valid pointers for numChannels channel data buffers.
- The input buffers MUST contain the amount of samples returned by
- a previous call to InSamplesNeeded. Output buffers must have space
- for \a outSamples audio samples.
-
- @param[out] outputBuffers Pointer to output buffer array
- @param[in] inputBuffers Pointer to input buffer array
- @param[in] outSamples The number of samples the converter produces
- @return Number of output samples
- */
-
- virtual int ProcessToOutput(int16 *outputBuffers[],
- int16 *inputBuffers[],
- int outSamples);
-
- //@}
-
-private:
-
- /** Constructor
- */
- RESAMPLER_SincConvTwoToThreeInt16(int channelCount);
-
- /** Disabled copy contructor
- */
- RESAMPLER_SincConvTwoToThreeInt16(const RESAMPLER_SincConvTwoToThreeInt16 &);
-
- /** Initializes converter.
-
- This method initializes the sampling rate converter.
-
- @return true if success false otherwise
- */
-
- virtual bool Init();
-
- /** Deallocate all the allocated memory
-
- This methods deallocates all memory previously allocated by
- Init(). Can be used both for recovering from a memory
- allocation error and in destructor.
- */
- void DeInit();
-
- /** Enable one of the channels */
- void EnableChannel(int channel);
-
- /** Disable one of the channels */
- void DisableChannel(int channel);
-
- int16 **m_memBuffers;
- int16 *m_scratchBuffer;
-
- const int16 *m_filter1;
- const int16 *m_filter2;
- int m_channelCount;
- int m_blockSize;
- bool *m_channelEnabled;
-
- int m_inputSamples;
-
- int m_state;
-};
-
-
-#endif // __RESAMPLER_SINC_CONV_TWO_TO_THREE_INT16_H__