s60_amr_nb.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:5k
- /* ***** 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 "./s60_amr_nb.h"
- #include "amr_frame_hdr.h"
- const UINT32 MaxSamples = 160;
- CS60AMRCodec::CS60AMRCodec() :
- m_lRefCount(0),
- m_pDecoder(0),
- m_nConcealSamples(0)
- {}
- CS60AMRCodec::~CS60AMRCodec()
- {
- if (m_pDecoder)
- {
- delete m_pDecoder;
- m_pDecoder = 0;
- }
- }
- /*
- * IUnknown methods
- */
- STDMETHODIMP CS60AMRCodec::QueryInterface(REFIID riid, void** ppvObj)
- {
- HX_RESULT res = HXR_NOINTERFACE;
- *ppvObj = NULL;
- if (IsEqualIID(riid, IID_IUnknown))
- {
- AddRef();
- *ppvObj = this;
- res = HXR_OK;
- }
- else if (IsEqualIID(riid, IID_IHXAudioDecoder))
- {
- AddRef();
- *ppvObj = (IHXAudioDecoder*)this;
- res = HXR_OK;
- }
- return res;
- }
- STDMETHODIMP_(ULONG32) CS60AMRCodec::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- STDMETHODIMP_(ULONG32) CS60AMRCodec::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- /*
- * IHXAudioDecoder methods
- */
- STDMETHODIMP CS60AMRCodec::OpenDecoder(UINT32 cfgType, const void* config,
- UINT32 nBytes)
- {
- HX_RESULT res = HXR_FAILED;
- if (m_pDecoder)
- {
- delete m_pDecoder;
- m_pDecoder = 0;
- }
- TInt exitValue;
- TAmrDecParams conf;
- // Init call for EPOC AMR codec has to be inside a trap to avoid
- // a kernel panic
- conf.iConcealment = 0;
- TRAP( exitValue, m_pDecoder = CAmrToPcmDecoder::NewL(conf) );
- if (!exitValue && m_pDecoder)
- {
- res = HXR_OK;
- }
- return res;
- }
- STDMETHODIMP CS60AMRCodec::Reset()
- {
- HX_RESULT res = HXR_OK;
- if (m_pDecoder)
- {
- m_pDecoder->Reset();
- }
-
- m_nConcealSamples = 0;
- return res;
- }
- STDMETHODIMP CS60AMRCodec::GetMaxSamplesOut(UINT32& nSamples) CONSTMETHOD
- {
- nSamples = MaxSamples;
- return HXR_OK;
- }
- STDMETHODIMP CS60AMRCodec::GetNChannels(UINT32& nChannels) CONSTMETHOD
- {
- nChannels = 1;
- return HXR_OK;
- }
- STDMETHODIMP CS60AMRCodec::GetSampleRate(UINT32& sampleRate) CONSTMETHOD
- {
- sampleRate = 8000;
- return HXR_OK;
- }
- STDMETHODIMP CS60AMRCodec::GetDelay(UINT32& nSamples) CONSTMETHOD
- {
- nSamples = 0;
- return HXR_OK;
- }
- STDMETHODIMP CS60AMRCodec::Decode(const UCHAR* data, UINT32 nBytes,
- UINT32 &nBytesConsumed, INT16 *samplesOut,
- UINT32& nSamplesOut, BOOL eof)
- {
- HX_RESULT res = HXR_UNEXPECTED;
- nSamplesOut = 0;
- nBytesConsumed = 0;
- if (m_pDecoder)
- {
- if (m_nConcealSamples)
- {
- // Currently we do not do anything special for concealment
- // so we will just output silence for the concealment
- // samples.
- if (m_nConcealSamples > MaxSamples)
- nSamplesOut = MaxSamples;
- else
- nSamplesOut = m_nConcealSamples;
- for (UINT32 i = 0; i < nSamplesOut; i++)
- *samplesOut++ = 0;
- m_nConcealSamples -= nSamplesOut;
- res = HXR_OK;
- }
- else if (nBytes)
- {
- TInt consumed = 0;
- TInt outSize = MaxSamples * 2;
- if (m_pDecoder->Decode((UCHAR*)data, consumed,
- (UCHAR*)samplesOut, outSize, FALSE) == 0)
- {
- nSamplesOut = outSize / 2;
- nBytesConsumed = consumed;
- res = HXR_OK;
- }
- }
- else
- {
- res = HXR_OK;
- }
- }
-
- return res;
- }
- STDMETHODIMP CS60AMRCodec::Conceal(UINT32 nSamples)
- {
- // We want to conceal only in MaxSamples size blocks.
- UINT32 nFrameCount = (nSamples + MaxSamples - 1) / MaxSamples;
- UINT32 nConcealSamples = nFrameCount * MaxSamples;
- m_nConcealSamples += nConcealSamples;
- return HXR_OK;
- }