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a381e0b7c6
#rb phil.popp #jira UE-178166, UE-178167, UE-178169, UE-178180 #preflight 641a3a0fa6092dfb8d752a67 [CL 24756329 by Brian Chrisman in ue5-main branch]
105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "AudioCaptureCore.h"
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#include "Windows/AllowWindowsPlatformTypes.h"
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#include "Windows/AllowWindowsPlatformAtomics.h"
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THIRD_PARTY_INCLUDES_START
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#include <AudioClient.h>
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THIRD_PARTY_INCLUDES_END
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#include "Windows/HideWindowsPlatformAtomics.h"
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#include "Windows/HideWindowsPlatformTypes.h"
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namespace Audio
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{
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/**
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* EWasapiAudioEncoding - Audio bit depths supported by WASAPI implementation
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*/
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enum class EWasapiAudioEncoding : uint8
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{
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UNKNOWN,
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PCM_8,
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PCM_16,
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PCM_24,
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PCM_24_IN_32,
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PCM_32,
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FLOATING_POINT_32,
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FLOATING_POINT_64
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};
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/**
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* FWasapiAudioFormat - Wrapper class for Windows WAVEFORMATEX and WAVEFORMATEXTENSIBLE structs.
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*/
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class FWasapiAudioFormat
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{
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public:
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/** FWasapiAudioFormat - Constructs underlying WAVEFORMATEX with default values. */
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FWasapiAudioFormat();
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/**
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* FWasapiAudioFormat - Constructs underlying data structure with given WAVEFORMATEX parameter.
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*
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* @param InFormat - Pointer to a WAVEFORMATEX struct from which to construct this object.
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* Correctly handles the extended form, WAVEFORMATEXTENSIBLE.
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*/
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explicit FWasapiAudioFormat(WAVEFORMATEX* InFormat);
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/**
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* FWasapiAudioFormat - Constructs underlying data structure using given parameters.
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*
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* @param InChannels - Number of audio channels.
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* @param InSampleRate - Samples per second (Hz).
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* @param InEncoding - For PCM data, this is the bit depth of data (e.g. 16-bit integer, 32-bit float, etc.)
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*/
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FWasapiAudioFormat(uint16 InChannels, uint32 InSampleRate, EWasapiAudioEncoding InEncoding);
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/** GetEncoding - Returns the encoding for this audio format. */
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EWasapiAudioEncoding GetEncoding() const;
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/** GetNumChannels - Returns the number of audio channels present in this format. */
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uint32 GetNumChannels() const;
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/** GetSampleRate - Returns the audio sample rate for this format. */
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uint32 GetSampleRate() const;
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/** GetBitsPerSample - Returns the bit depth for the audio data as an integer value. */
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uint32 GetBitsPerSample() const;
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/** GetBytesPerSample - Returns the number of bytes needed to store a single sample of audio data. */
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uint32 GetBytesPerSample() const;
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/** GetFrameSizeInBytes - Returns the number of bytes needed to store a singe frame of audio data. */
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uint32 GetFrameSizeInBytes() const;
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/** GetEncodingString - Returns string form of encoding. Suitable for logging. */
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FString GetEncodingString() const;
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/**
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* GetWaveFormat - Returns pointer to raw WAVEFORMATEX struct. Use this for specific OS API calls
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* which require it. Otherwise use the accessors above.
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*/
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const WAVEFORMATEX* GetWaveFormat() const;
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private:
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/** InitAudioFormat - Init method used by constructors to initialize data. */
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void InitAudioFormat(uint16 InChannels, uint32 InSampleRate, EWasapiAudioEncoding InEncoding);
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/** InitAudioEncoding - Parses underlying WAVEFORMATEXTENSIBLE structure and determines corresponding encoding. */
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void InitAudioEncoding();
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/** DetermineAudioEncoding - Helper function for determining audio encoding from WAVEFORMATEXTENSIBLE struct. */
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static EWasapiAudioEncoding DetermineAudioEncoding(const WAVEFORMATEXTENSIBLE& InFormat);
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/** EncodingToBitDepth - Helper function for getting bit depth from InEncoding parameter. */
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static uint16 EncodingToBitDepth(EWasapiAudioEncoding InEncoding);
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/** WaveFormat - Windows wave format struct which this object wraps. */
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WAVEFORMATEXTENSIBLE WaveFormat = {};
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/** Encoding - Audio encoding for this object. */
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EWasapiAudioEncoding Encoding = EWasapiAudioEncoding::UNKNOWN;
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};
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}
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