![]() Specifies the author-supplied fold-down coefficients for decoding multichannel audio for fewer channels than the encoded stream contains. Specifies the dynamic-range control mode that the audio decoder will use. ![]() ![]() Specifies the maximum number of additional PCM samples that might be returned at the end of decoding a file. MFPKEY_Decoder_MaxNumPCMSamplesWithPaddedSilence The Windows Media Audio decoder supports the following properties. If you obtain an IMFTransform interface on an audio decoder, it behaves as an MFT. If you obtain an IMFTransform interface or an IPropertyStore interface on an audio decoder, it behaves as an MFT.īy default, a Windows Media Audio decoder behaves as a DMO. Operating systemĪ Windows Media Audio decoder always behaves as a DMO.īy default, a Windows Media Audio decoder behaves as a DMO. The following table shows the conditions under which an audio decoder behaves as a DMO or an MFT. PCM/IEEE format in WAVEFORMATEXTENSIBLE structureĪn audio decoder object exposes the IMediaObject interface so that the object can be used as a DirectX Media Object (DMO), and it exposes the IMFTransform interface so that the object can be used as a Media Foundation Transform (MFT).Ī Windows Media Audio decoder behaves as a DMO or an MFT depending on which interfaces you obtain and which version of Windows is running. For information about how to set the input and output types for the decoder, see Configuring Audio Encoding. ![]() The following table shows the audio format tags that represent the output types supported by the Windows Media Audio Decoder. For information about how to set the input and output types for the decoder, see Configuring Audio Decoding. The following table shows the audio format tags that represent the input categories supported by the Windows Media Audio decoder. You can create an instance of the audio decoder by calling CoCreateInstance. The class identifier (CLSID) for the Windows Media Audio decoder is represented by the constant CLSID_CWMADecMediaObject. ![]() The encoder and decoder support three categories of encoded audio: Windows Media Audio Standard, Windows Media Audio Professional, and Windows Media Audio Lossless. The Windows Media Audio decoder decodes audio streams that were encoded by the Windows Media Audio Encoder. ![]()
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