![]() The #define statements shown here, are available in the KSMedia.h header file. KSATTRIBUTEID_AUDIOSIGNALPROCESSING_MODE is an identifier to Kernel Streaming that identifies that the specific attribute that is being referenced, is the signal processing mode attribute. HRESULT ActivateAudioInterfaceCompletionHandler::ActivateCompleted( IActivateAudioInterfaceAsyncOperation *activateOperation ) " the app’s implementation of IActivateAudioInterfaceCompetionHandler is invoked asynchronously Hr = ActivateAudioInterfaceAsync( defaultRender->Data(), _uuidof( IAudioClient3 ), nullptr, this, &asyncOp ) String ^defaultRender = Windows::Media::Devices::MediaDevice::GetDefaultAudioRenderId( Windows::Media::Devices::AudioDeviceRole::Default ) IActivateAudioInterfaceAsyncOperation *asyncOp = nullptr The ActivateAudioInterfaceAsync is a replacment for IMMDevice::Activate The following WASAPI code from the WASAPIAudio sample shows how to set different audio categories. ![]() They cannot find out what mode is used for each of their streams. Applications have no awareness of the concept of an "audio processing mode". Applications can tag each of their streams with one of the 10 audio categories.Īpplications do not have the option to change the mapping between an audio category and a signal processing mode. navigation apps) (New category in Windows 10)īalls bouncing, car engine sounds, bullets, etc.Īs mentioned previously, audio categories (selected by applications) are mapped to audio modes (defined by drivers). In-game communication between users (New category in Windows 10) Movies, video with dialog (Replaces ForegroundOnlyMedia)ĭefault category for media playback (Replaces BackgroundCapableMedia) In Windows 10 there are nine audio stream categories. Applications can set the audio category, using any of the audio APIs, just after creating the audio stream. In order to inform the system about the usage of an audio stream, applications have the option to tag the stream with a specific audio stream category. The following diagram shows a system that supports multiple modes: If a particular mode is not supported by the driver, then Windows will use the next best matching mode. what types of APOs are installed as part of the driver) and inform the OS accordingly. Drivers define which signal processing modes they support (i.e. It is possible that not all modes might be available for a particular system. Signal Processing Mode Driver RequirementsĪudio device drivers need to support at least the Raw or Default mode. ![]() Music audio playback (default for most media streams) ![]() This mode defines the default audio processing. An application can request a raw stream that is completely untouched and perform its own signal processing. Raw mode specifies that there should not be any signal processing applied to the stream. The modes are summarized in the table shown below. It is recommended that IHVs/OEMs utilize the new modes to add audio effects that optimize the audio signal to provide the best user experience. OEMs and IHVs can determine which modes they want to implement. Windows defines seven audio signal processing modes. Available Signal Processing ModesĪudio categories (selected by applications) are mapped to audio modes (defined by drivers). Drivers declare the supported audio signal processing modes for each device. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |