VorbisDecodeOutputPin.cpp

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//===========================================================================
//Copyright (C) 2003, 2004 Zentaro Kavanagh
//
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//modification, are permitted provided that the following conditions
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//- Redistributions in binary form must reproduce the above copyright
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//  may be used to endorse or promote products derived from this software 
//  without specific prior written permission.
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//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#include "stdafx.h"
#include "Vorbisdecodeoutputpin.h"

VorbisDecodeOutputPin::VorbisDecodeOutputPin(VorbisDecodeFilter* inParentFilter, CCritSec* inFilterLock, vector<CMediaType*> inAcceptableMediaTypes)
        : AbstractTransformOutputPin(inParentFilter, inFilterLock,NAME("VorbisDecodeOutputPin"), L"PCM Out", 65536, 20, inAcceptableMediaTypes)
{

                
}
VorbisDecodeOutputPin::~VorbisDecodeOutputPin(void)
{
        
        
}

STDMETHODIMP VorbisDecodeOutputPin::NonDelegatingQueryInterface(REFIID riid, void **ppv)
{
        if (riid == IID_IMediaSeeking) {
                *ppv = (IMediaSeeking*)this;
                ((IUnknown*)*ppv)->AddRef();
                return NOERROR;
        }

        return CBaseOutputPin::NonDelegatingQueryInterface(riid, ppv); 
}

HRESULT VorbisDecodeOutputPin::CreateAndFillFormatBuffer(CMediaType* outMediaType, int inPosition)
{
        if (inPosition == 0) {
                WAVEFORMATEX* locWaveFormat = (WAVEFORMATEX*)outMediaType->AllocFormatBuffer(sizeof(WAVEFORMATEX));
                //TODO::: Check for null ?

                locWaveFormat->wFormatTag = WAVE_FORMAT_PCM;
                locWaveFormat->nChannels = ((VorbisDecodeFilter*)m_pFilter)->mVorbisFormatInfo->numChannels;
                locWaveFormat->nSamplesPerSec =  ((VorbisDecodeFilter*)m_pFilter)->mVorbisFormatInfo->samplesPerSec;
                locWaveFormat->wBitsPerSample = 16;
                locWaveFormat->nBlockAlign = (locWaveFormat->nChannels) * (locWaveFormat->wBitsPerSample >> 3);
                locWaveFormat->nAvgBytesPerSec = ((locWaveFormat->nChannels) * (locWaveFormat->wBitsPerSample >> 3)) * locWaveFormat->nSamplesPerSec;
                locWaveFormat->cbSize = 0;
                return S_OK;
        } else {
        return S_FALSE;
        }
}

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