SpeexDecodeFilter.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 Files
00033 #include "stdafx.h"
00034 #include "SpeexDecodeFilter.h"
00035 
00036 
00037 //COM Factory Template
00038 CFactoryTemplate g_Templates[] = 
00039 {
00040     { 
00041                 L"Speex Decode Filter",                                 // Name
00042             &CLSID_SpeexDecodeFilter,                           // CLSID
00043             SpeexDecodeFilter::CreateInstance,          // Method to create an instance of Speex Decoder
00044         NULL,                                                                   // Initialization function
00045         NULL                                                                    // Set-up information (for filters)
00046     }
00047 
00048 };
00049 
00050 // Generic way of determining the number of items in the template
00051 int g_cTemplates = sizeof(g_Templates) / sizeof(g_Templates[0]); 
00052 
00053 SpeexDecodeFilter::SpeexDecodeFilter()
00054         :       AbstractTransformFilter(NAME("Speex Audio Decoder"), CLSID_SpeexDecodeFilter)
00055         ,       mSpeexFormatInfo(NULL)
00056 {
00057 
00058         bool locWasConstructed = ConstructPins();
00059 }
00060 
00061 bool SpeexDecodeFilter::ConstructPins() 
00062 {
00063 
00064         //Vector to hold our set of media types we want to accept.
00065         vector<CMediaType*> locAcceptableTypes;
00066 
00067         //Setup the media types for the output pin.
00068         CMediaType* locAcceptMediaType = new CMediaType(&MEDIATYPE_Audio);              //Deleted in pin destructor
00069         locAcceptMediaType->subtype = MEDIASUBTYPE_PCM;
00070         locAcceptMediaType->formattype = FORMAT_WaveFormatEx;
00071         
00072         locAcceptableTypes.push_back(locAcceptMediaType);
00073 
00074         //Output pin must be done first because it's passed to the input pin.
00075         mOutputPin = new SpeexDecodeOutputPin(this, m_pLock, locAcceptableTypes);                       //Deleted in base class destructor
00076 
00077         //Clear out the vector, now we've already passed it to the output pin.
00078         locAcceptableTypes.clear();
00079 
00080         //Setup the media Types for the input pin.
00081         locAcceptMediaType = NULL;
00082         locAcceptMediaType = new CMediaType(&MEDIATYPE_Audio);                  //Deleted by pin
00083 
00084         locAcceptMediaType->subtype = MEDIASUBTYPE_Speex;
00085         locAcceptMediaType->formattype = FORMAT_Speex;
00086 
00087         locAcceptableTypes.push_back(locAcceptMediaType);
00088         
00089         mInputPin = new SpeexDecodeInputPin(this, m_pLock, mOutputPin, locAcceptableTypes);     //Deleted in base class filter destructor.
00090         return true;
00091 
00092 }
00093 
00094 SpeexDecodeFilter::~SpeexDecodeFilter(void)
00095 {
00096         delete mSpeexFormatInfo;
00097 }
00098 
00099 CUnknown* WINAPI SpeexDecodeFilter::CreateInstance(LPUNKNOWN pUnk, HRESULT *pHr) 
00100 {
00101         //This routine is the COM implementation to create a new Filter
00102         SpeexDecodeFilter *pNewObject = new SpeexDecodeFilter();
00103     if (pNewObject == NULL) {
00104         *pHr = E_OUTOFMEMORY;
00105     }
00106         return pNewObject;
00107 } 
00108 
00109 //QUERY::: Do we need these ? Aren't we all friedns here ??
00110 //RESULT::: Keep them, set function must be kept... get could go... but keep for consistency
00111 sSpeexFormatBlock* SpeexDecodeFilter::getSpeexFormatBlock() 
00112 {
00113         return mSpeexFormatInfo;
00114 }
00115 void SpeexDecodeFilter::setSpeexFormat(sSpeexFormatBlock* inFormatBlock) 
00116 {
00117         delete mSpeexFormatInfo;
00118         mSpeexFormatInfo = new sSpeexFormatBlock;
00119         *mSpeexFormatInfo = *inFormatBlock;
00120 }

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