SpeexDecodeOutputPin.cpp

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00001 //===========================================================================
00002 //Copyright (C) 2003, 2004 Zentaro Kavanagh
00003 //
00004 //Redistribution and use in source and binary forms, with or without
00005 //modification, are permitted provided that the following conditions
00006 //are met:
00007 //
00008 //- Redistributions of source code must retain the above copyright
00009 //  notice, this list of conditions and the following disclaimer.
00010 //
00011 //- Redistributions in binary form must reproduce the above copyright
00012 //  notice, this list of conditions and the following disclaimer in the
00013 //  documentation and/or other materials provided with the distribution.
00014 //
00015 //- Neither the name of Zentaro Kavanagh nor the names of contributors 
00016 //  may be used to endorse or promote products derived from this software 
00017 //  without specific prior written permission.
00018 //
00019 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00020 //``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00021 //LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00022 //PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
00023 //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024 //EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00025 //PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026 //PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027 //LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028 //NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029 //SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 //===========================================================================
00031 
00032 #include "stdafx.h"
00033 #include "speexdecodeoutputpin.h"
00034 
00035 SpeexDecodeOutputPin::SpeexDecodeOutputPin(SpeexDecodeFilter* inParentFilter, CCritSec* inFilterLock, vector<CMediaType*> inAcceptableMediaTypes)
00036         : AbstractTransformOutputPin(inParentFilter, inFilterLock,NAME("SpeexDecodeOutputPin"), L"PCM Out", 65536, 20, inAcceptableMediaTypes)
00037 {
00038 
00039                 
00040 }
00041 SpeexDecodeOutputPin::~SpeexDecodeOutputPin(void)
00042 {
00043         
00044         
00045 }
00046 
00047 STDMETHODIMP SpeexDecodeOutputPin::NonDelegatingQueryInterface(REFIID riid, void **ppv)
00048 {
00049         if (riid == IID_IMediaSeeking) {
00050                 *ppv = (IMediaSeeking*)this;
00051                 ((IUnknown*)*ppv)->AddRef();
00052                 return NOERROR;
00053         }
00054 
00055         return CBaseOutputPin::NonDelegatingQueryInterface(riid, ppv); 
00056 }
00057 HRESULT SpeexDecodeOutputPin::CreateAndFillFormatBuffer(CMediaType* outMediaType, int inPosition)
00058 {
00059         if (inPosition == 0) {
00060                 WAVEFORMATEX* locWaveFormat = (WAVEFORMATEX*)outMediaType->AllocFormatBuffer(sizeof(WAVEFORMATEX));
00061                 locWaveFormat->wFormatTag = WAVE_FORMAT_PCM;
00062                 locWaveFormat->nChannels = (WORD)(((SpeexDecodeFilter*)m_pFilter)->mSpeexFormatInfo->numChannels);
00063                 locWaveFormat->nSamplesPerSec =  ((SpeexDecodeFilter*)m_pFilter)->mSpeexFormatInfo->samplesPerSec;
00064                 locWaveFormat->wBitsPerSample = 16;             //TODO ::: Is this correct ?
00065                 locWaveFormat->nBlockAlign = (locWaveFormat->nChannels) * (locWaveFormat->wBitsPerSample >> 3);
00066                 locWaveFormat->nAvgBytesPerSec = ((locWaveFormat->nChannels) * (locWaveFormat->wBitsPerSample >> 3)) * locWaveFormat->nSamplesPerSec;
00067                 locWaveFormat->cbSize = 0;
00068                 return S_OK;
00069         } else {
00070                 return S_FALSE;
00071         }
00072 }

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