hxrsmp2.cpp
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上传日期:2007-06-06
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文件大小:11k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hxcom.h"
- #include "hxtypes.h"
- #include "hxresult.h"
- #ifdef _WINDOWS
- #include <windows.h>
- #endif
- #include "hlxclib/string.h"
- #include "timeval.h"
- #include "ihxpckts.h"
- #include "hxfiles.h"
- #include "hxengin.h"
- #include "hxcore.h"
- #include "hxprefs.h"
- #include "hxtick.h"
- #ifdef _MACINTOSH
- #include "hxmm.h"
- #endif
- #include "hxthread.h"
- //#include "resampl2.h"
- #include "hxausvc.h"
- #include "hxrsmp2.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- // HXScheduler...
- HXCDQualityResampler::HXCDQualityResampler()
- : m_lRefCount (0)
- , m_pResampler(NULL)
- , m_audioChannelConversion(AUDIO_CHANNEL_NONE)
- , m_audioSampleConversion(AUDIO_SAMPLE_NONE)
- , m_ulSamplesSaved(0)
- , m_ulSamplesFixed(0)
- , m_ulBytesFixed(0)
- , m_pBPS8To16Out(NULL)
- {
- }
- HXCDQualityResampler::~HXCDQualityResampler()
- {
- Close();
- }
- /*
- * IUnknown methods
- */
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::QueryInterface
- // Purpose:
- // Implement this to export the interfaces supported by your
- // object.
- //
- STDMETHODIMP HXCDQualityResampler::QueryInterface(REFIID riid, void** ppvObj)
- {
- QInterfaceList qiList[] =
- {
- { GET_IIDHANDLE(IID_IHXAudioResampler), (IHXAudioResampler*)this },
- { GET_IIDHANDLE(IID_IUnknown), (IUnknown*)(IHXAudioResampler*)this },
- };
-
- return ::QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::AddRef
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32) HXCDQualityResampler::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::Release
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32) HXCDQualityResampler::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- /*
- * IHXResampler methods
- */
- STDMETHODIMP_(UINT32)
- HXCDQualityResampler::Resample(UINT16* pInput,
- UINT32 ulInputBytes,
- UINT16* pOutput)
- {
- UINT32 ulOutputBytes = 0;
- UINT32 ulSamplesIn = 0;
- UINT32 ulFramesIn = 0;
- UINT32 ulSamplesOut = 0;
- UINT32 ulBytesSaved = 0;
- UINT32 ulOut = 0;
- ulSamplesIn = (ulInputBytes * 8) / m_inAudioFormat.uBitsPerSample;
-
- ulSamplesOut = ulSamplesIn;
- ulOutputBytes = ulInputBytes;
- // channel conversion first(STEREO -> MONO)
- // MONO -> STEREO is handled by the caller(AudioStream)
- if (AUDIO_CHANNEL_DOWN == m_audioChannelConversion)
- {
- Downmix16((short*)pInput, ulSamplesIn);
- // half the output samples after channel conversion
- ulSamplesIn /= 2;
- ulSamplesOut = ulSamplesIn;
- }
- // resampler's output always be 16bits
- if (m_inAudioFormat.uBitsPerSample == 8 && m_outAudioFormat.uBitsPerSample == 16)
- {
- ulFramesIn = ulSamplesIn / m_inAudioFormat.uChannels;
- ulOut = m_inAudioFormat.uChannels * 2 * ulFramesIn;
- if (!m_pBPS8To16Out)
- {
- m_pBPS8To16Out = (short*)new char[ulOut];
- }
- BPS8To16((short*)pInput, ulInputBytes, (short*)m_pBPS8To16Out, ulOut);
- pInput = (UINT16*)m_pBPS8To16Out;
- }
- if (m_pResampler)
- {
- if (m_ulSamplesSaved)
- {
- ulBytesSaved = m_ulSamplesSaved * m_outAudioFormat.uBitsPerSample / 8;
- HX_ASSERT(ulBytesSaved < m_ulBytesFixed);
- if (ulBytesSaved >= m_ulBytesFixed) ulBytesSaved = m_ulBytesFixed;
- ::memcpy(pOutput, (UCHAR*)pOutput+m_ulBytesFixed, ulBytesSaved); /* Flawfinder: ignore */
- }
- ulSamplesOut = m_pResampler->Resample((short*)pInput,
- ulSamplesIn,
- (short*)((UCHAR*)pOutput + ulBytesSaved));
- m_ulSamplesSaved += ulSamplesOut - m_ulSamplesFixed;
- ulOutputBytes = m_ulBytesFixed;
- }
- else
- {
- ulOutputBytes = (ulSamplesOut * m_outAudioFormat.uBitsPerSample) / 8;
- HX_ASSERT(ulOutputBytes < m_ulBytesFixed);
- if (ulOutputBytes >= m_ulBytesFixed) ulOutputBytes = m_ulBytesFixed;
- ::memcpy(pOutput, pInput, ulOutputBytes); /* Flawfinder: ignore */
- }
- return ulOutputBytes;
- }
- STDMETHODIMP_(UINT32)
- HXCDQualityResampler::Requires(UINT32 outputFrames)
- {
- UINT32 inputFrames = 0;
- UINT32 ulSamplesRequired = 0;
- // we only need to resample half of the output frames
- // since the caller will do the MONO -> STEREO channel conversion
- if (AUDIO_CHANNEL_UP == m_audioChannelConversion)
- {
- outputFrames /= 2;
- }
- // take into account of the extra samples from the last Resample()
- ulSamplesRequired = outputFrames * m_outAudioFormat.uChannels - m_ulSamplesSaved;
- m_ulSamplesFixed = outputFrames * m_outAudioFormat.uChannels;
- m_ulBytesFixed = (outputFrames * m_outAudioFormat.uChannels * m_outAudioFormat.uBitsPerSample) / 8;;
- if (m_pResampler)
- {
- inputFrames = m_pResampler->GetMinInput(ulSamplesRequired) / m_inAudioFormat.uChannels;
- }
- else
- {
- inputFrames = ulSamplesRequired / m_inAudioFormat.uChannels;
- }
- // we need to double the input frames for STEREO -> MONO channel
- // conversion
- if (AUDIO_CHANNEL_DOWN == m_audioChannelConversion)
- {
- inputFrames *= 2;
- }
- return inputFrames;
- }
- HX_RESULT
- HXCDQualityResampler::Init(HXAudioFormat inAudioFormat,
- REF(HXAudioFormat) outAudioFormat)
- {
- HX_RESULT rc = HXR_OK;
- CopyAudioFormat(inAudioFormat, m_inAudioFormat);
- CopyAudioFormat(outAudioFormat, m_outAudioFormat);
- INT32 actualMaxSamplesIn = (m_inAudioFormat.uMaxBlockSize * 8) / m_inAudioFormat.uBitsPerSample;
- INT32 actualMaxSamplesOut = 0;
- INT32 actualMaxInputBytes = m_inAudioFormat.uMaxBlockSize;
- INT32 actualResamplerChannel = m_inAudioFormat.uChannels;
- // cleanup the mess
- Close();
- // this wrapper class will do the STEREO -> MONO channel conversion
- // MONO -> STEREO channel conversion will be done by the caller
- if (m_outAudioFormat.uChannels > m_inAudioFormat.uChannels)
- {
- m_audioChannelConversion = AUDIO_CHANNEL_UP;
- }
- else if (m_outAudioFormat.uChannels < m_inAudioFormat.uChannels)
- {
- m_audioChannelConversion = AUDIO_CHANNEL_DOWN;
- actualMaxInputBytes /= 2;
- actualResamplerChannel = m_outAudioFormat.uChannels;
- }
- else
- {
- m_audioChannelConversion = AUDIO_CHANNEL_NONE;
- }
- if (m_outAudioFormat.ulSamplesPerSec == m_inAudioFormat.ulSamplesPerSec)
- {
- m_audioSampleConversion = AUDIO_SAMPLE_NONE;
- }
- else
- {
- m_audioSampleConversion = AUDIO_SAMPLE_NEEDED;
- }
- if (AUDIO_SAMPLE_NONE != m_audioSampleConversion)
- {
- if (HXR_OK == RAExactResampler::Create(&m_pResampler,
- m_inAudioFormat.ulSamplesPerSec,
- m_outAudioFormat.ulSamplesPerSec,
- actualResamplerChannel,
- RAExactResampler::_INT16)) // 16bit per sample output
- {
- actualMaxSamplesOut = m_pResampler->GetMaxOutput(actualMaxSamplesIn);
- }
- else
- {
- HX_DELETE(m_pResampler);
- rc = HXR_FAILED;
- }
- }
- else
- {
- actualMaxSamplesOut = actualMaxSamplesIn;
- }
- outAudioFormat.uMaxBlockSize = m_outAudioFormat.uMaxBlockSize = (actualMaxSamplesOut * m_outAudioFormat.uBitsPerSample) / 8;
-
- return rc;
- }
- void
- HXCDQualityResampler::Downmix16(INT16* pIn, UINT32 nSamplesIn)
- {
- UINT32 i ;
- for (i = 0 ; i < nSamplesIn / 2 ; i++)
- {
- INT32 t = (INT32)pIn[2*i] + (INT32)pIn[2*i+1] ;
- pIn[i] = (INT16)(t>>1);
- }
- }
- void
- HXCDQualityResampler::BPS8To16(INT16* pInput, UINT32 ulBytesIn, INT16* pOutput, UINT32& ulBytesOut)
- {
- long inputFrames = ulBytesIn / (m_inAudioFormat.uBitsPerSample/8) / m_inAudioFormat.uChannels;
- long n = 0;
- if (1 == m_outAudioFormat.uChannels)
- {
- unsigned char* pIn = (unsigned char*) pInput;
- for (n = 0; n < inputFrames; n++)
- {
- pOutput[n] = (short) (((short)*pIn++ - 128) << 8);
- }
- }
- else if (2 == m_outAudioFormat.uChannels)
- {
- unsigned char* pIn = (unsigned char*) pInput;
- long m = 0;
- for (n = 0; n < inputFrames; n++ )
- {
- pOutput[m] = (short) (((short)*pIn++ - 128) << 8);
- m++;
- pOutput[m] = (short) (((short)*pIn++ - 128) << 8);
- m++;
- }
- }
- ulBytesOut = m_inAudioFormat.uChannels * 2 * inputFrames;
- return;
- }
- void
- HXCDQualityResampler::CopyAudioFormat(HXAudioFormat from, REF(HXAudioFormat) to)
- {
- to.uChannels = from.uChannels;
- to.uBitsPerSample = from.uBitsPerSample;
- to.ulSamplesPerSec = from.ulSamplesPerSec;
- to.uMaxBlockSize = from.uMaxBlockSize;
- }
- void
- HXCDQualityResampler::Close()
- {
- HX_VECTOR_DELETE(m_pBPS8To16Out);
- HX_DELETE(m_pResampler);
- }