INTERLEAVED_AUDIO_FORMAT_INFORMATION - NtDoc
Native API online documentation, based on the System Informer
(formerly Process Hacker) phnt
headers
// ksmedia.h
typedef struct {
ULONG Size;
DWORD PrimaryChannelCount;
DWORD PrimaryChannelStartPosition;
DWORD PrimaryChannelMask;
DWORD InterleavedChannelCount;
DWORD InterleavedChannelStartPosition;
DWORD InterleavedChannelMask;
} INTERLEAVED_AUDIO_FORMAT_INFORMATION;
View the official Windows Driver Kit DDI referenceNo description available.
The INTERLEAVED_AUDIO_FORMAT_INFORMATION structure specifies how loopback audio is interleaved with the microphone audio for KSPROPERTY_INTERLEAVEDAUDIO_FORMATINFORMATION.
SizeThe size of all of the data in the INTERLEAVED_AUDIO_FORMAT_INFORMATION structure in bytes.
PrimaryChannelCountThe number of the primary channels. This is typically the number of microphone elements when interleaving the microphone and loopback audio.
PrimaryChannelStartPositionThe array index of the first channel for the primary audio.
PrimaryChannelMaskThe primary channel mask, KSAUDIO_SPEAKER_MONO, KSAUDIO_SPEAKER_STEREO, etc.
InterleavedChannelCountThe number of interleaved channels. This is typically the number of channels for the loopback audio associated with the primary channels.
InterleavedChannelStartPositionThe array index of the first channel for the interleaved audio.
InterleavedChannelMaskThe interleaved channel mask, KSAUDIO_SPEAKER_MONO, KSAUDIO_SPEAKER_STEREO, etc.
The data described by this structure is intended only for the Hardware Keyword Spotter pin and provides a way to include loopback audio interleaved with the microphone audio. This is done by interleaving the Hardware Keyword Spotter pin audio and loopback audio together into a single PCM audio stream and then communicating, via this property, the channels containing loopback vs. microphone audio.
The WAVEFORMATEXTENSIBLE returned by the driver reports the channel count as a sum of the primary and loopback audio, with a channel mask appropriate for the total channel count. The primary and interleaved audio must have matching bits per sample, sample rate, etc. This structure communicates all information needed to split the two streams of data.
KSPROPERTY_INTERLEAVEDAUDIO_FORMATINFORMATION
KSPROPERTY_INTERLEAVEDAUDIO Enumeration