From 47808f5f90827a10d85bb4096f49800c5606801e Mon Sep 17 00:00:00 2001 From: ssdfasd <2156608475@qq.com> Date: Fri, 20 Mar 2026 20:31:24 +0800 Subject: [PATCH] Add audio module foundation: AudioTypes, AudioConfig, IAudioBackend, WASAPIBackend, AudioSystem, AudioSourceComponent, AudioListenerComponent, and third-party KissFFT library --- engine/CMakeLists.txt | 1 + engine/include/XCEngine/Audio/AudioConfig.h | 18 + engine/include/XCEngine/Audio/AudioSystem.h | 84 ++++ engine/include/XCEngine/Audio/AudioTypes.h | 117 +++++ engine/include/XCEngine/Audio/IAudioBackend.h | 39 ++ .../XCEngine/Audio/WASAPI/WASAPIBackend.h | 95 ++++ .../Components/AudioListenerComponent.h | 60 +++ .../Components/AudioSourceComponent.h | 118 +++++ engine/src/Audio/AudioSystem.cpp | 157 +++++++ engine/src/Audio/WASAPI/WASAPIBackend.cpp | 247 +++++++++++ .../src/Components/AudioListenerComponent.cpp | 53 +++ .../src/Components/AudioSourceComponent.cpp | 239 ++++++++++ third_party/kissfft/CMakeLists.txt | 5 + third_party/kissfft/_kiss_fft_guts.h | 164 +++++++ third_party/kissfft/kiss_fft.c | 408 ++++++++++++++++++ third_party/kissfft/kiss_fft.h | 124 ++++++ third_party/kissfft/kiss_fftr.c | 159 +++++++ third_party/kissfft/kiss_fftr.h | 46 ++ 18 files changed, 2134 insertions(+) create mode 100644 engine/include/XCEngine/Audio/AudioConfig.h create mode 100644 engine/include/XCEngine/Audio/AudioSystem.h create mode 100644 engine/include/XCEngine/Audio/AudioTypes.h create mode 100644 engine/include/XCEngine/Audio/IAudioBackend.h create mode 100644 engine/include/XCEngine/Audio/WASAPI/WASAPIBackend.h create mode 100644 engine/include/XCEngine/Components/AudioListenerComponent.h create mode 100644 engine/include/XCEngine/Components/AudioSourceComponent.h create mode 100644 engine/src/Audio/AudioSystem.cpp create mode 100644 engine/src/Audio/WASAPI/WASAPIBackend.cpp create mode 100644 engine/src/Components/AudioListenerComponent.cpp create mode 100644 engine/src/Components/AudioSourceComponent.cpp create mode 100644 third_party/kissfft/CMakeLists.txt create mode 100644 third_party/kissfft/_kiss_fft_guts.h create mode 100644 third_party/kissfft/kiss_fft.c create mode 100644 third_party/kissfft/kiss_fft.h create mode 100644 third_party/kissfft/kiss_fftr.c create mode 100644 third_party/kissfft/kiss_fftr.h diff --git a/engine/CMakeLists.txt b/engine/CMakeLists.txt index 4ba9ad51..0d04c645 100644 --- a/engine/CMakeLists.txt +++ b/engine/CMakeLists.txt @@ -154,6 +154,7 @@ add_library(XCEngine STATIC ${CMAKE_CURRENT_SOURCE_DIR}/src/RHI/OpenGL/OpenGLSwapChain.cpp ${CMAKE_CURRENT_SOURCE_DIR}/src/RHI/OpenGL/OpenGLRenderTargetView.cpp ${CMAKE_CURRENT_SOURCE_DIR}/src/RHI/OpenGL/OpenGLDepthStencilView.cpp + ${CMAKE_CURRENT_SOURCE_DIR}/src/RHI/OpenGL/OpenGLScreenshot.cpp # RHI Factory ${CMAKE_CURRENT_SOURCE_DIR}/src/RHI/RHIFactory.cpp diff --git a/engine/include/XCEngine/Audio/AudioConfig.h b/engine/include/XCEngine/Audio/AudioConfig.h new file mode 100644 index 00000000..760fd36b --- /dev/null +++ b/engine/include/XCEngine/Audio/AudioConfig.h @@ -0,0 +1,18 @@ +#pragma once + +#include "AudioTypes.h" + +namespace XCEngine { +namespace Audio { + +struct AudioConfig { + uint32_t sampleRate = 48000; + uint16 channels = 2; + uint16 bitsPerSample = 16; + SpeakerMode speakerMode = SpeakerMode::Stereo; + uint32 bufferSize = 8192; + uint32 bufferCount = 2; +}; + +} // namespace Audio +} // namespace XCEngine diff --git a/engine/include/XCEngine/Audio/AudioSystem.h b/engine/include/XCEngine/Audio/AudioSystem.h new file mode 100644 index 00000000..d6642706 --- /dev/null +++ b/engine/include/XCEngine/Audio/AudioSystem.h @@ -0,0 +1,84 @@ +#pragma once + +#include "IAudioBackend.h" +#include "AudioConfig.h" +#include "AudioTypes.h" +#include +#include +#include +#include +#include + +namespace XCEngine { +namespace Components { +class AudioSourceComponent; +} + +namespace Audio { + +class AudioSystem { +public: + static AudioSystem& Get(); + + void Initialize(const AudioConfig& config); + void Shutdown(); + + void Update(float deltaTime); + + void SetBackend(std::unique_ptr backend); + IAudioBackend* GetBackend() const { return m_backend.get(); } + + std::string GetCurrentDevice() const; + void SetDevice(const std::string& deviceName); + void GetAvailableDevices(std::vector& devices); + + float GetMasterVolume() const; + void SetMasterVolume(float volume); + + bool IsMuted() const; + void SetMuted(bool muted); + + void ProcessAudio(float* buffer, uint32 sampleCount, uint32 channels); + + void SetListenerTransform(const Math::Vector3& position, const Math::Quaternion& rotation); + void SetListenerVelocity(const Math::Vector3& velocity); + + const Math::Vector3& GetListenerPosition() const { return m_listenerPosition; } + const Math::Quaternion& GetListenerRotation() const { return m_listenerRotation; } + const Math::Vector3& GetListenerVelocity() const { return m_listenerVelocity; } + + void RegisterSource(Components::AudioSourceComponent* source); + void UnregisterSource(Components::AudioSourceComponent* source); + + struct Stats { + uint32_t activeSources; + uint32_t totalSources; + uint64_t memoryUsage; + float cpuUsage; + }; + const Stats& GetStats() const { return m_stats; } + +private: + AudioSystem() = default; + ~AudioSystem() = default; + + AudioSystem(const AudioSystem&) = delete; + AudioSystem& operator=(const AudioSystem&) = delete; + + void ProcessSource(Components::AudioSourceComponent* source, float* buffer, uint32 sampleCount, uint32 channels); + +private: + std::unique_ptr m_backend; + + Math::Vector3 m_listenerPosition = Math::Vector3::Zero(); + Math::Quaternion m_listenerRotation = Math::Quaternion::Identity(); + Math::Vector3 m_listenerVelocity = Math::Vector3::Zero(); + + std::vector m_activeSources; + + Stats m_stats = {}; + float m_deltaTime = 0.0f; +}; + +} // namespace Audio +} // namespace XCEngine diff --git a/engine/include/XCEngine/Audio/AudioTypes.h b/engine/include/XCEngine/Audio/AudioTypes.h new file mode 100644 index 00000000..c33bb71c --- /dev/null +++ b/engine/include/XCEngine/Audio/AudioTypes.h @@ -0,0 +1,117 @@ +#pragma once + +#include +#include +#include +#include "../../../third_party/kissfft/kiss_fft.h" + +namespace XCEngine { +namespace Audio { + +using int8 = int8_t; +using int16 = int16_t; +using int32 = int32_t; +using int64 = int64_t; +using uint8 = uint8_t; +using uint16 = uint16_t; +using uint32 = uint32_t; +using uint64 = uint64_t; + +enum class AudioResourceType { + AudioClip, + AudioMixer, + AudioBank +}; + +enum class AudioLoadState { + Unloaded, + Loading, + Loaded, + Failed +}; + +enum class AudioFormat { + Unknown, + WAV, + OGG, + MP3, + FLAC, + AAC +}; + +enum class SpeakerMode { + Mono, + Stereo, + Surround51, + Surround71, + Surround51_2, + Surround71_2 +}; + +enum class AudioChannel { + FrontLeft, + FrontRight, + FrontCenter, + LFE, + BackLeft, + BackRight, + SideLeft, + SideRight +}; + +enum class PlayState { + Stopped, + Playing, + Paused +}; + +enum class StopMode { + Immediate, + AllowFadeOut +}; + +enum class PanMode { + Pan3D, + Pan2D +}; + +enum class VolumeSource { + Direct, + PathOcclusion, + Transmission, + Obstruction +}; + +struct Audio3DParams { + float dopplerLevel = 1.0f; + float speedOfSound = 343.0f; + float minDistance = 1.0f; + float maxDistance = 500.0f; + float panLevel = 1.0f; + float spread = 0.0f; + float reverbZoneMix = 1.0f; +}; + +struct AudioBufferDesc { + uint32_t size = 0; + uint32_t channels = 2; + uint32_t sampleRate = 48000; + uint16 bitsPerSample = 16; + bool isFloat = false; + bool isCompressed = false; + AudioFormat format = AudioFormat::Unknown; +}; + +struct SpatializerParams { + float azimuth = 0.0f; + float elevation = 0.0f; + float distance = 0.0f; + float volumeDb = 0.0f; + float panCartesianX = 0.0f; + float panCartesianY = 0.0f; + bool isOccluded = false; + bool isObstructed = false; +}; + +} // namespace Audio +} // namespace XCEngine diff --git a/engine/include/XCEngine/Audio/IAudioBackend.h b/engine/include/XCEngine/Audio/IAudioBackend.h new file mode 100644 index 00000000..6f616c71 --- /dev/null +++ b/engine/include/XCEngine/Audio/IAudioBackend.h @@ -0,0 +1,39 @@ +#pragma once + +#include "AudioConfig.h" +#include + +namespace XCEngine { +namespace Audio { + +class IAudioBackend { +public: + virtual ~IAudioBackend() = default; + + virtual bool Initialize(const AudioConfig& config) = 0; + virtual void Shutdown() = 0; + + virtual std::string GetDeviceName() const = 0; + virtual void GetAvailableDevices(std::vector& devices) = 0; + virtual bool SetDevice(const std::string& deviceName) = 0; + + virtual float GetMasterVolume() const = 0; + virtual void SetMasterVolume(float volume) = 0; + + virtual bool IsMuted() const = 0; + virtual void SetMuted(bool muted) = 0; + + virtual void Start() = 0; + virtual void Stop() = 0; + virtual void Suspend() = 0; + virtual void Resume() = 0; + + virtual void ProcessAudio(float* buffer, uint32 bufferSize, + uint32 channels, uint32 sampleRate) = 0; + + virtual bool IsRunning() const = 0; + virtual AudioConfig GetConfig() const = 0; +}; + +} // namespace Audio +} // namespace XCEngine diff --git a/engine/include/XCEngine/Audio/WASAPI/WASAPIBackend.h b/engine/include/XCEngine/Audio/WASAPI/WASAPIBackend.h new file mode 100644 index 00000000..c7b48eba --- /dev/null +++ b/engine/include/XCEngine/Audio/WASAPI/WASAPIBackend.h @@ -0,0 +1,95 @@ +#pragma once + +#include "../../IAudioBackend.h" +#include +#include +#include +#include + +#ifdef _WIN32 +#include +#include +#pragma comment(lib, "winmm.lib") +#endif + +namespace XCEngine { +namespace Audio { +namespace WASAPI { + +class WASAPIBackend : public IAudioBackend { +public: + WASAPIBackend(); + ~WASAPIBackend() override; + + bool Initialize(const AudioConfig& config) override; + void Shutdown() override; + + std::string GetDeviceName() const override; + void GetAvailableDevices(std::vector& devices) override; + bool SetDevice(const std::string& deviceName) override; + + float GetMasterVolume() const override; + void SetMasterVolume(float volume) override; + + bool IsMuted() const override; + void SetMuted(bool muted) override; + + void Start() override; + void Stop() override; + void Suspend() override; + void Resume() override; + + void ProcessAudio(float* buffer, uint32 bufferSize, + uint32 channels, uint32 sampleRate) override; + + bool IsRunning() const override { return m_isRunning.load(); } + AudioConfig GetConfig() const override { return m_config; } + +private: + MMRESULT InitDevice(); + MMRESULT InitBuffer(); + + static DWORD WINAPI AudioThreadProc(LPVOID lpParameter); + void AudioThread(); + + void OnAudioCallback(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, + DWORD_PTR dwParam1, DWORD_PTR dwParam2); + static void CALLBACK StaticAudioCallback(HWAVEOUT hwo, UINT uMsg, + DWORD_PTR dwInstance, + DWORD_PTR dwParam1, DWORD_PTR dwParam2); + + MMRESULT PlayFrontData(); + void PrepareBackData(); + void SwapBuffer(); + +private: + std::atomic m_isRunning{false}; + std::thread m_audioThread; + + AudioConfig m_config; + + WAVEFORMATEX m_waveFormat = {}; + HWAVEOUT m_hWaveOut = nullptr; + + std::vector m_mixBuffer; + uint32 m_mixBufferSize = 0; + + std::vector m_waveOutCaps; + std::string m_deviceName; + + std::atomic m_masterVolume{1.0f}; + std::atomic m_muted{false}; + + static constexpr size_t BufferSize = 8192; + std::vector m_audioBuffer1; + std::vector m_audioBuffer2; + bool m_isBuffer1Front = true; + bool m_isBufferPrepared = false; + + WAVEHDR m_waveHeader1 = {}; + WAVEHDR m_waveHeader2 = {}; +}; + +} // namespace WASAPI +} // namespace Audio +} // namespace XCEngine diff --git a/engine/include/XCEngine/Components/AudioListenerComponent.h b/engine/include/XCEngine/Components/AudioListenerComponent.h new file mode 100644 index 00000000..c644d929 --- /dev/null +++ b/engine/include/XCEngine/Components/AudioListenerComponent.h @@ -0,0 +1,60 @@ +#pragma once + +#include +#include +#include +#include + +namespace XCEngine { +namespace Audio { +class AudioMixer; +} + +namespace Components { + +class AudioListenerComponent : public Component { +public: + AudioListenerComponent(); + ~AudioListenerComponent() override; + + float GetEnergy() const { return m_energy; } + const float* GetFrequencyData() const { return m_frequencyData.data(); } + size_t GetFrequencyDataSize() const { return m_frequencyData.size(); } + + void SetMasterVolume(float volume); + float GetMasterVolume() const { return m_masterVolume; } + + void SetMute(bool mute); + bool IsMute() const { return m_mute; } + + void SetDopplerLevel(float level); + float GetDopplerLevel() const { return m_dopplerLevel; } + + void SetSpeedOfSound(float metersPerSecond); + float GetSpeedOfSound() const { return m_speedOfSound; } + + void SetReverbLevel(float level); + float GetReverbLevel() const { return m_reverbLevel; } + + void SetReverb(Audio::AudioMixer* reverb); + Audio::AudioMixer* GetReverb() const { return m_reverb; } + + void Update(float deltaTime) override; + + std::string GetName() const override { return "AudioListener"; } + +private: + float m_masterVolume = 1.0f; + bool m_mute = false; + float m_dopplerLevel = 1.0f; + float m_speedOfSound = 343.0f; + float m_reverbLevel = 1.0f; + + Audio::AudioMixer* m_reverb = nullptr; + + float m_energy = 0.0f; + std::vector m_frequencyData; +}; + +} // namespace Components +} // namespace XCEngine diff --git a/engine/include/XCEngine/Components/AudioSourceComponent.h b/engine/include/XCEngine/Components/AudioSourceComponent.h new file mode 100644 index 00000000..7e800a61 --- /dev/null +++ b/engine/include/XCEngine/Components/AudioSourceComponent.h @@ -0,0 +1,118 @@ +#pragma once + +#include +#include +#include +#include +#include +#include + +namespace XCEngine { +namespace Resources { +class AudioClip; +} + +namespace Audio { +class AudioMixer; +} + +namespace Components { + +class AudioSourceComponent : public Component { +public: + AudioSourceComponent(); + ~AudioSourceComponent() override; + + void Play(); + void Pause(); + void Stop(Audio::StopMode mode = Audio::StopMode::Immediate); + bool IsPlaying() const { return m_playState == Audio::PlayState::Playing; } + bool IsPaused() const { return m_playState == Audio::PlayState::Paused; } + + void SetClip(Resources::AudioClip* clip); + Resources::AudioClip* GetClip() const { return m_clip; } + + void SetVolume(float volume); + float GetVolume() const { return m_volume; } + + void SetPitch(float pitch); + float GetPitch() const { return m_pitch; } + + void SetPan(float pan); + float GetPan() const { return m_pan; } + + void SetLooping(bool loop); + bool IsLooping() const { return m_isLooping; } + + void SetSpatialize(bool spatialize); + bool IsSpatialize() const { return m_spatialize; } + + void Set3DParams(const Audio::Audio3DParams& params); + const Audio::Audio3DParams& Get3DParams() const { return m_3DParams; } + + void SetDopplerLevel(float level); + float GetDopplerLevel() const { return m_3DParams.dopplerLevel; } + + void SetSpread(float spread); + float GetSpread() const { return m_3DParams.spread; } + + void SetReverbZoneMix(float mix); + float GetReverbZoneMix() const { return m_3DParams.reverbZoneMix; } + + void SetOutputMixer(Audio::AudioMixer* mixer); + Audio::AudioMixer* GetOutputMixer() const { return m_outputMixer; } + + void SetTime(float seconds); + float GetTime() const; + float GetDuration() const; + + float GetEnergy() const { return m_energy; } + void StartEnergyDetect(); + void StopEnergyDetect(); + bool IsEnergyDetecting() const { return m_isEnergyDetecting; } + + void Update(float deltaTime) override; + void OnEnable() override; + void OnDisable() override; + void OnDestroy() override; + + void ProcessAudio(float* buffer, Audio::uint32 sampleCount, Audio::uint32 channels, + const Math::Vector3& listenerPosition, + const Math::Quaternion& listenerRotation); + + std::string GetName() const override { return "AudioSource"; } + +private: + void Apply3DAttenuation(const Math::Vector3& listenerPosition); + void UpdateEnergy(const float* buffer, Audio::uint32 sampleCount); + +private: + Resources::AudioClip* m_clip = nullptr; + Audio::AudioMixer* m_outputMixer = nullptr; + + Audio::PlayState m_playState = Audio::PlayState::Stopped; + bool m_isLooping = false; + + float m_volume = 1.0f; + float m_pitch = 1.0f; + float m_pan = 0.0f; + bool m_spatialize = true; + + Audio::Audio3DParams m_3DParams; + + Audio::uint64 m_samplePosition = 0; + double m_lastingTime = 0.0; + + bool m_isEnergyDetecting = false; + float m_energy = 0.0f; + float m_maxEnergy = 5.0f; + std::deque m_energyHistory; + + static constexpr size_t BufferSize = 8192; + std::vector m_outputBuffer; + std::vector m_decodedData; + bool m_isDecoded = false; +}; + +} // namespace Components +} // namespace XCEngine diff --git a/engine/src/Audio/AudioSystem.cpp b/engine/src/Audio/AudioSystem.cpp new file mode 100644 index 00000000..c75f4bf2 --- /dev/null +++ b/engine/src/Audio/AudioSystem.cpp @@ -0,0 +1,157 @@ +#include +#include +#include + +namespace XCEngine { +namespace Audio { + +AudioSystem& AudioSystem::Get() { + static AudioSystem instance; + return instance; +} + +void AudioSystem::Initialize(const AudioConfig& config) { + if (m_backend) { + Shutdown(); + } + + m_backend = std::make_unique(); + if (m_backend->Initialize(config)) { + m_backend->Start(); + std::cout << "AudioSystem initialized successfully" << std::endl; + } else { + std::cout << "Failed to initialize AudioSystem" << std::endl; + m_backend.reset(); + } +} + +void AudioSystem::Shutdown() { + if (m_backend) { + m_backend->Stop(); + m_backend->Shutdown(); + m_backend.reset(); + } + m_activeSources.clear(); +} + +void AudioSystem::Update(float deltaTime) { + m_deltaTime = deltaTime; + + if (!m_backend || !m_backend->IsRunning()) { + return; + } + + const auto& config = m_backend->GetConfig(); + uint32 sampleCount = config.bufferSize * config.channels; + + std::vector mixBuffer(sampleCount, 0.0f); + + for (auto* source : m_activeSources) { + if (source && source->IsEnabled() && source->IsPlaying()) { + ProcessSource(source, mixBuffer.data(), sampleCount, config.channels); + } + } + + m_backend->ProcessAudio(mixBuffer.data(), sampleCount, config.channels, config.sampleRate); + + uint32 activeCount = 0; + for (auto* source : m_activeSources) { + if (source && source->IsPlaying()) { + activeCount++; + } + } + m_stats.activeSources = activeCount; + m_stats.totalSources = static_cast(m_activeSources.size()); +} + +void AudioSystem::SetBackend(std::unique_ptr backend) { + m_backend = std::move(backend); +} + +std::string AudioSystem::GetCurrentDevice() const { + if (m_backend) { + return m_backend->GetDeviceName(); + } + return ""; +} + +void AudioSystem::SetDevice(const std::string& deviceName) { + if (m_backend) { + m_backend->SetDevice(deviceName); + } +} + +void AudioSystem::GetAvailableDevices(std::vector& devices) { + if (m_backend) { + m_backend->GetAvailableDevices(devices); + } +} + +float AudioSystem::GetMasterVolume() const { + if (m_backend) { + return m_backend->GetMasterVolume(); + } + return 1.0f; +} + +void AudioSystem::SetMasterVolume(float volume) { + if (m_backend) { + m_backend->SetMasterVolume(volume); + } +} + +bool AudioSystem::IsMuted() const { + if (m_backend) { + return m_backend->IsMuted(); + } + return false; +} + +void AudioSystem::SetMuted(bool muted) { + if (m_backend) { + m_backend->SetMuted(muted); + } +} + +void AudioSystem::ProcessAudio(float* buffer, uint32 sampleCount, uint32 channels) { + if (m_backend) { + m_backend->ProcessAudio(buffer, sampleCount, channels, 48000); + } +} + +void AudioSystem::SetListenerTransform(const Math::Vector3& position, const Math::Quaternion& rotation) { + m_listenerPosition = position; + m_listenerRotation = rotation; +} + +void AudioSystem::SetListenerVelocity(const Math::Vector3& velocity) { + m_listenerVelocity = velocity; +} + +void AudioSystem::RegisterSource(Components::AudioSourceComponent* source) { + if (source) { + m_activeSources.push_back(source); + } +} + +void AudioSystem::UnregisterSource(Components::AudioSourceComponent* source) { + if (!source) { + return; + } + + auto it = std::find(m_activeSources.begin(), m_activeSources.end(), source); + if (it != m_activeSources.end()) { + m_activeSources.erase(it); + } +} + +void AudioSystem::ProcessSource(Components::AudioSourceComponent* source, float* buffer, uint32 sampleCount, uint32 channels) { + if (!source || !buffer) { + return; + } + + source->ProcessAudio(buffer, sampleCount, channels, m_listenerPosition, m_listenerRotation); +} + +} // namespace Audio +} // namespace XCEngine diff --git a/engine/src/Audio/WASAPI/WASAPIBackend.cpp b/engine/src/Audio/WASAPI/WASAPIBackend.cpp new file mode 100644 index 00000000..2aa5ee6c --- /dev/null +++ b/engine/src/Audio/WASAPI/WASAPIBackend.cpp @@ -0,0 +1,247 @@ +#include +#include + +namespace XCEngine { +namespace Audio { +namespace WASAPI { + +WASAPIBackend::WASAPIBackend() + : m_audioBuffer1(BufferSize * 2) + , m_audioBuffer2(BufferSize * 2) +{ +} + +WASAPIBackend::~WASAPIBackend() { + Shutdown(); +} + +bool WASAPIBackend::Initialize(const AudioConfig& config) { + m_config = config; + + m_waveFormat.wFormatTag = WAVE_FORMAT_PCM; + m_waveFormat.nChannels = static_cast(config.channels); + m_waveFormat.nSamplesPerSec = config.sampleRate; + m_waveFormat.nAvgBytesPerSec = config.sampleRate * config.channels * (config.bitsPerSample / 8); + m_waveFormat.nBlockAlign = static_cast(config.channels * (config.bitsPerSample / 8)); + m_waveFormat.wBitsPerSample = config.bitsPerSample; + m_waveFormat.cbSize = 0; + + MMRESULT result = InitDevice(); + if (result != MMSYSERR_NOERROR) { + return false; + } + + result = InitBuffer(); + if (result != MMSYSERR_NOERROR) { + waveOutClose(m_hWaveOut); + return false; + } + + return true; +} + +void WASAPIBackend::Shutdown() { + if (m_isRunning.load()) { + Stop(); + } + + if (m_hWaveOut != nullptr) { + waveOutUnprepareHeader(m_hWaveOut, &m_waveHeader1, sizeof(WAVEHDR)); + waveOutUnprepareHeader(m_hWaveOut, &m_waveHeader2, sizeof(WAVEHDR)); + waveOutClose(m_hWaveOut); + m_hWaveOut = nullptr; + } +} + +std::string WASAPIBackend::GetDeviceName() const { + return m_deviceName; +} + +void WASAPIBackend::GetAvailableDevices(std::vector& devices) { + devices.clear(); + for (const auto& caps : m_waveOutCaps) { + devices.push_back(caps.szPname); + } +} + +bool WASAPIBackend::SetDevice(const std::string& deviceName) { + for (UINT i = 0; i < waveOutGetNumDevs(); ++i) { + WAVEOUTCAPS caps; + waveOutGetDevCaps(i, &caps, sizeof(WAVEOUTCAPS)); + if (deviceName == caps.szPname) { + m_deviceName = deviceName; + return true; + } + } + return false; +} + +float WASAPIBackend::GetMasterVolume() const { + return m_masterVolume.load(); +} + +void WASAPIBackend::SetMasterVolume(float volume) { + m_masterVolume.store(std::max(0.0f, std::min(1.0f, volume))); +} + +bool WASAPIBackend::IsMuted() const { + return m_muted.load(); +} + +void WASAPIBackend::SetMuted(bool muted) { + m_muted.store(muted); +} + +void WASAPIBackend::Start() { + if (m_isRunning.load()) { + return; + } + + m_isRunning = true; + m_audioThread = std::thread(&WASAPIBackend::AudioThreadProc, this); +} + +void WASAPIBackend::Stop() { + m_isRunning = false; + + if (m_audioThread.joinable()) { + m_audioThread.join(); + } +} + +void WASAPIBackend::Suspend() { + if (m_hWaveOut != nullptr) { + waveOutReset(m_hWaveOut); + } +} + +void WASAPIBackend::Resume() { + if (m_hWaveOut != nullptr) { + MMRESULT result = waveOutRestart(m_hWaveOut); + if (result != MMSYSERR_NOERROR) { + std::cout << "Failed to resume audio playback" << std::endl; + } + } +} + +void WASAPIBackend::ProcessAudio(float* buffer, uint32 bufferSize, + uint32 channels, uint32 sampleRate) { + if (m_muted.load() || buffer == nullptr) { + return; + } + + float volume = m_masterVolume.load(); + if (volume < 0.001f) { + return; + } + + uint32 sampleCount = bufferSize / sizeof(float); + for (uint32 i = 0; i < sampleCount; ++i) { + buffer[i] *= volume; + } +} + +MMRESULT WASAPIBackend::InitDevice() { + WAVEOUTCAPS waveOutCapsTemp; + for (UINT i = 0; i < waveOutGetNumDevs(); ++i) { + waveOutGetDevCaps(i, &waveOutCapsTemp, sizeof(WAVEOUTCAPS)); + m_waveOutCaps.push_back(waveOutCapsTemp); + } + + MMRESULT result = waveOutOpen(&m_hWaveOut, WAVE_MAPPER, &m_waveFormat, + (DWORD_PTR)&WASAPIBackend::StaticAudioCallback, + reinterpret_cast(this), CALLBACK_FUNCTION); + if (result != MMSYSERR_NOERROR) { + std::cout << "Failed to open audio device" << std::endl; + return result; + } + + m_deviceName = "Default Device"; + return MMSYSERR_NOERROR; +} + +MMRESULT WASAPIBackend::InitBuffer() { + m_waveHeader1.lpData = (LPSTR)m_audioBuffer1.data(); + m_waveHeader1.dwBufferLength = static_cast(m_audioBuffer1.size() * sizeof(int16_t)); + m_waveHeader1.dwFlags = 0; + + MMRESULT result = waveOutPrepareHeader(m_hWaveOut, &m_waveHeader1, sizeof(WAVEHDR)); + if (result != MMSYSERR_NOERROR) { + std::cout << "Failed to prepare audio header1" << std::endl; + return result; + } + + m_waveHeader2.lpData = (LPSTR)m_audioBuffer2.data(); + m_waveHeader2.dwBufferLength = static_cast(m_audioBuffer2.size() * sizeof(int16_t)); + m_waveHeader2.dwFlags = 0; + + result = waveOutPrepareHeader(m_hWaveOut, &m_waveHeader2, sizeof(WAVEHDR)); + if (result != MMSYSERR_NOERROR) { + std::cout << "Failed to prepare audio header2" << std::endl; + waveOutUnprepareHeader(m_hWaveOut, &m_waveHeader1, sizeof(WAVEHDR)); + return result; + } + + return MMSYSERR_NOERROR; +} + +DWORD WINAPI WASAPIBackend::AudioThreadProc(LPVOID lpParameter) { + WASAPIBackend* backend = static_cast(lpParameter); + if (backend) { + backend->AudioThread(); + } + return 0; +} + +void WASAPIBackend::AudioThread() { + PlayFrontData(); + SwapBuffer(); + PlayFrontData(); + + while (m_isRunning.load()) { + std::this_thread::sleep_for(std::chrono::milliseconds(1)); + } +} + +void WASAPIBackend::OnAudioCallback(HWAVEOUT hwo, UINT uMsg, DWORD_PTR dwInstance, + DWORD_PTR dwParam1, DWORD_PTR dwParam2) { + if (uMsg == WOM_DONE) { + PrepareBackData(); + SwapBuffer(); + PlayFrontData(); + } +} + +void CALLBACK WASAPIBackend::StaticAudioCallback(HWAVEOUT hwo, UINT uMsg, + DWORD_PTR dwInstance, + DWORD_PTR dwParam1, DWORD_PTR dwParam2) { + WASAPIBackend* backend = reinterpret_cast(dwInstance); + if (backend != nullptr) { + backend->OnAudioCallback(hwo, uMsg, dwInstance, dwParam1, dwParam2); + } +} + +MMRESULT WASAPIBackend::PlayFrontData() { + WAVEHDR* frontHeader = m_isBuffer1Front ? &m_waveHeader1 : &m_waveHeader2; + MMRESULT result = waveOutWrite(m_hWaveOut, frontHeader, sizeof(WAVEHDR)); + if (result != MMSYSERR_NOERROR) { + std::cout << "Failed to write audio data" << std::endl; + } + return result; +} + +void WASAPIBackend::PrepareBackData() { + if (!m_isBufferPrepared) { + memset(m_audioBuffer1.data(), 0, m_audioBuffer1.size() * sizeof(int16_t)); + memset(m_audioBuffer2.data(), 0, m_audioBuffer2.size() * sizeof(int16_t)); + m_isBufferPrepared = true; + } +} + +void WASAPIBackend::SwapBuffer() { + m_isBuffer1Front = !m_isBuffer1Front; +} + +} // namespace WASAPI +} // namespace Audio +} // namespace XCEngine diff --git a/engine/src/Components/AudioListenerComponent.cpp b/engine/src/Components/AudioListenerComponent.cpp new file mode 100644 index 00000000..a1278035 --- /dev/null +++ b/engine/src/Components/AudioListenerComponent.cpp @@ -0,0 +1,53 @@ +#include +#include +#include + +namespace XCEngine { +namespace Components { + +AudioListenerComponent::AudioListenerComponent() +{ +} + +AudioListenerComponent::~AudioListenerComponent() { +} + +void AudioListenerComponent::SetMasterVolume(float volume) { + m_masterVolume = std::max(0.0f, std::min(1.0f, volume)); + Audio::AudioSystem::Get().SetMasterVolume(m_masterVolume); +} + +void AudioListenerComponent::SetMute(bool mute) { + m_mute = mute; + Audio::AudioSystem::Get().SetMuted(m_mute); +} + +void AudioListenerComponent::SetDopplerLevel(float level) { + m_dopplerLevel = std::max(0.0f, std::min(5.0f, level)); +} + +void AudioListenerComponent::SetSpeedOfSound(float metersPerSecond) { + m_speedOfSound = std::max(1.0f, metersPerSecond); +} + +void AudioListenerComponent::SetReverbLevel(float level) { + m_reverbLevel = std::max(0.0f, std::min(1.0f, level)); +} + +void AudioListenerComponent::SetReverb(Audio::AudioMixer* reverb) { + m_reverb = reverb; +} + +void AudioListenerComponent::Update(float deltaTime) { + if (!m_gameObject) { + return; + } + + Math::Vector3 position = transform().GetPosition(); + Math::Quaternion rotation = transform().GetRotation(); + + Audio::AudioSystem::Get().SetListenerTransform(position, rotation); +} + +} // namespace Components +} // namespace XCEngine diff --git a/engine/src/Components/AudioSourceComponent.cpp b/engine/src/Components/AudioSourceComponent.cpp new file mode 100644 index 00000000..83def59d --- /dev/null +++ b/engine/src/Components/AudioSourceComponent.cpp @@ -0,0 +1,239 @@ +#include +#include +#include +#include + +namespace XCEngine { +namespace Components { + +AudioSourceComponent::AudioSourceComponent() + : m_outputBuffer(BufferSize * 2, 0.0f) +{ +} + +AudioSourceComponent::~AudioSourceComponent() { + if (m_playState == Audio::PlayState::Playing) { + Audio::AudioSystem::Get().UnregisterSource(this); + } +} + +void AudioSourceComponent::Play() { + if (!m_clip || !m_clip->IsValid()) { + return; + } + + if (m_playState == Audio::PlayState::Paused) { + m_playState = Audio::PlayState::Playing; + return; + } + + m_samplePosition = 0; + m_lastingTime = 0.0; + m_playState = Audio::PlayState::Playing; + Audio::AudioSystem::Get().RegisterSource(this); +} + +void AudioSourceComponent::Pause() { + if (m_playState == Audio::PlayState::Playing) { + m_playState = Audio::PlayState::Paused; + Audio::AudioSystem::Get().UnregisterSource(this); + } +} + +void AudioSourceComponent::Stop(Audio::StopMode mode) { + if (m_playState != Audio::PlayState::Stopped) { + m_playState = Audio::PlayState::Stopped; + m_samplePosition = 0; + Audio::AudioSystem::Get().UnregisterSource(this); + } +} + +void AudioSourceComponent::SetClip(Resources::AudioClip* clip) { + m_clip = clip; + m_isDecoded = false; + if (clip && clip->IsValid()) { + m_decodedData.resize(clip->GetAudioData().Size() / 2); + } +} + +void AudioSourceComponent::SetVolume(float volume) { + m_volume = std::max(0.0f, std::min(1.0f, volume)); +} + +void AudioSourceComponent::SetPitch(float pitch) { + m_pitch = std::max(0.0f, std::min(3.0f, pitch)); +} + +void AudioSourceComponent::SetPan(float pan) { + m_pan = std::max(-1.0f, std::min(1.0f, pan)); +} + +void AudioSourceComponent::SetLooping(bool loop) { + m_isLooping = loop; +} + +void AudioSourceComponent::SetSpatialize(bool spatialize) { + m_spatialize = spatialize; +} + +void AudioSourceComponent::Set3DParams(const Audio::Audio3DParams& params) { + m_3DParams = params; +} + +void AudioSourceComponent::SetDopplerLevel(float level) { + m_3DParams.dopplerLevel = level; +} + +void AudioSourceComponent::SetSpread(float spread) { + m_3DParams.spread = std::max(0.0f, std::min(1.0f, spread)); +} + +void AudioSourceComponent::SetReverbZoneMix(float mix) { + m_3DParams.reverbZoneMix = std::max(0.0f, std::min(1.0f, mix)); +} + +void AudioSourceComponent::SetOutputMixer(Audio::AudioMixer* mixer) { + m_outputMixer = mixer; +} + +void AudioSourceComponent::SetTime(float seconds) { + if (!m_clip || !m_clip->IsValid()) { + return; + } + + Audio::uint32 sampleRate = m_clip->GetSampleRate(); + Audio::uint32 channels = m_clip->GetChannels(); + Audio::uint64 sampleOffset = static_cast(seconds * sampleRate * channels); + m_samplePosition = sampleOffset; + m_lastingTime = seconds; +} + +float AudioSourceComponent::GetTime() const { + return static_cast(m_lastingTime); +} + +float AudioSourceComponent::GetDuration() const { + if (!m_clip || !m_clip->IsValid()) { + return 0.0f; + } + return m_clip->GetDuration(); +} + +void AudioSourceComponent::StartEnergyDetect() { + m_isEnergyDetecting = true; + m_energyHistory.clear(); +} + +void AudioSourceComponent::StopEnergyDetect() { + m_isEnergyDetecting = false; +} + +void AudioSourceComponent::Update(float deltaTime) { + if (m_playState != Audio::PlayState::Playing || !m_clip) { + return; + } + + m_lastingTime += deltaTime * m_pitch; + + Audio::uint32 channels = m_clip->GetChannels(); + Audio::uint32 sampleRate = m_clip->GetSampleRate(); + Audio::uint64 samplesPerSecond = sampleRate * channels; + Audio::uint64 samplesToAdvance = static_cast(deltaTime * m_pitch * samplesPerSecond); + m_samplePosition += samplesToAdvance; + + Audio::uint64 totalSamples = static_cast(m_clip->GetAudioData().Size()) / (m_clip->GetBitsPerSample() / 8); + + if (m_samplePosition >= totalSamples) { + if (m_isLooping) { + m_samplePosition = m_samplePosition % totalSamples; + } else { + Stop(); + } + } +} + +void AudioSourceComponent::OnEnable() { + if (m_playState == Audio::PlayState::Playing) { + Audio::AudioSystem::Get().RegisterSource(this); + } +} + +void AudioSourceComponent::OnDisable() { + if (m_playState == Audio::PlayState::Playing) { + Audio::AudioSystem::Get().UnregisterSource(this); + } +} + +void AudioSourceComponent::OnDestroy() { + Stop(); +} + +void AudioSourceComponent::ProcessAudio(float* buffer, Audio::uint32 sampleCount, Audio::uint32 channels, + const Math::Vector3& listenerPosition, + const Math::Quaternion& listenerRotation) { + if (m_playState != Audio::PlayState::Playing || !m_clip) { + return; + } + + if (channels == 0 || sampleCount == 0) { + return; + } + + float volume = m_volume; + if (m_spatialize) { + Apply3DAttenuation(listenerPosition); + volume *= m_volume; + } + + for (Audio::uint32 i = 0; i < sampleCount && i < BufferSize * 2; ++i) { + buffer[i] += m_outputBuffer[i] * volume; + } + + if (m_isEnergyDetecting) { + UpdateEnergy(buffer, sampleCount); + } +} + +void AudioSourceComponent::Apply3DAttenuation(const Math::Vector3& listenerPosition) { + if (!m_gameObject) { + return; + } + + Math::Vector3 sourcePosition = transform().GetPosition(); + Math::Vector3 direction = sourcePosition - listenerPosition; + float distance = direction.Magnitude(); + + if (distance > m_3DParams.maxDistance) { + m_volume = 0.0f; + return; + } + + float normalizedDistance = distance / m_3DParams.maxDistance; + normalizedDistance = std::max(0.0f, std::min(1.0f, normalizedDistance)); + + float attenuation = 1.0f - normalizedDistance; + attenuation = std::pow(attenuation, 2.0f); + + m_volume *= attenuation; +} + +void AudioSourceComponent::UpdateEnergy(const float* buffer, Audio::uint32 sampleCount) { + if (!buffer || sampleCount == 0) { + return; + } + + float sumSquares = 0.0f; + for (Audio::uint32 i = 0; i < sampleCount; ++i) { + sumSquares += buffer[i] * buffer[i]; + } + + m_energy = std::sqrt(sumSquares / static_cast(sampleCount)); + + m_energyHistory.push_back(m_energy); + if (m_energyHistory.size() > 10) { + m_energyHistory.pop_front(); + } +} + +} // namespace Components +} // namespace XCEngine diff --git a/third_party/kissfft/CMakeLists.txt b/third_party/kissfft/CMakeLists.txt new file mode 100644 index 00000000..910b8236 --- /dev/null +++ b/third_party/kissfft/CMakeLists.txt @@ -0,0 +1,5 @@ +#递归将本文件夹下所有c放到FUNCS中 +file(GLOB_RECURSE FFT ./ *.c) + +#将FUNCS中所有cpp编译为funcs这个lib库 +add_library(fft ${FFT} ) \ No newline at end of file diff --git a/third_party/kissfft/_kiss_fft_guts.h b/third_party/kissfft/_kiss_fft_guts.h new file mode 100644 index 00000000..ba661444 --- /dev/null +++ b/third_party/kissfft/_kiss_fft_guts.h @@ -0,0 +1,164 @@ +/* +Copyright (c) 2003-2010, Mark Borgerding + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +/* kiss_fft.h + defines kiss_fft_scalar as either short or a float type + and defines + typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */ +#include "kiss_fft.h" +#include + +#define MAXFACTORS 32 +/* e.g. an fft of length 128 has 4 factors + as far as kissfft is concerned + 4*4*4*2 + */ + +struct kiss_fft_state{ + int nfft; + int inverse; + int factors[2*MAXFACTORS]; + kiss_fft_cpx twiddles[1]; +}; + +/* + Explanation of macros dealing with complex math: + + C_MUL(m,a,b) : m = a*b + C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise + C_SUB( res, a,b) : res = a - b + C_SUBFROM( res , a) : res -= a + C_ADDTO( res , a) : res += a + * */ +#ifdef FIXED_POINT +#if (FIXED_POINT==32) +# define FRACBITS 31 +# define SAMPPROD int64_t +#define SAMP_MAX 2147483647 +#else +# define FRACBITS 15 +# define SAMPPROD int32_t +#define SAMP_MAX 32767 +#endif + +#define SAMP_MIN -SAMP_MAX + +#if defined(CHECK_OVERFLOW) +# define CHECK_OVERFLOW_OP(a,op,b) \ + if ( (SAMPPROD)(a) op (SAMPPROD)(b) > SAMP_MAX || (SAMPPROD)(a) op (SAMPPROD)(b) < SAMP_MIN ) { \ + fprintf(stderr,"WARNING:overflow @ " __FILE__ "(%d): (%d " #op" %d) = %ld\n",__LINE__,(a),(b),(SAMPPROD)(a) op (SAMPPROD)(b) ); } +#endif + + +# define smul(a,b) ( (SAMPPROD)(a)*(b) ) +# define sround( x ) (kiss_fft_scalar)( ( (x) + (1<<(FRACBITS-1)) ) >> FRACBITS ) + +# define S_MUL(a,b) sround( smul(a,b) ) + +# define C_MUL(m,a,b) \ + do{ (m).r = sround( smul((a).r,(b).r) - smul((a).i,(b).i) ); \ + (m).i = sround( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0) + +# define DIVSCALAR(x,k) \ + (x) = sround( smul( x, SAMP_MAX/k ) ) + +# define C_FIXDIV(c,div) \ + do { DIVSCALAR( (c).r , div); \ + DIVSCALAR( (c).i , div); }while (0) + +# define C_MULBYSCALAR( c, s ) \ + do{ (c).r = sround( smul( (c).r , s ) ) ;\ + (c).i = sround( smul( (c).i , s ) ) ; }while(0) + +#else /* not FIXED_POINT*/ + +# define S_MUL(a,b) ( (a)*(b) ) +#define C_MUL(m,a,b) \ + do{ (m).r = (a).r*(b).r - (a).i*(b).i;\ + (m).i = (a).r*(b).i + (a).i*(b).r; }while(0) +# define C_FIXDIV(c,div) /* NOOP */ +# define C_MULBYSCALAR( c, s ) \ + do{ (c).r *= (s);\ + (c).i *= (s); }while(0) +#endif + +#ifndef CHECK_OVERFLOW_OP +# define CHECK_OVERFLOW_OP(a,op,b) /* noop */ +#endif + +#define C_ADD( res, a,b)\ + do { \ + CHECK_OVERFLOW_OP((a).r,+,(b).r)\ + CHECK_OVERFLOW_OP((a).i,+,(b).i)\ + (res).r=(a).r+(b).r; (res).i=(a).i+(b).i; \ + }while(0) +#define C_SUB( res, a,b)\ + do { \ + CHECK_OVERFLOW_OP((a).r,-,(b).r)\ + CHECK_OVERFLOW_OP((a).i,-,(b).i)\ + (res).r=(a).r-(b).r; (res).i=(a).i-(b).i; \ + }while(0) +#define C_ADDTO( res , a)\ + do { \ + CHECK_OVERFLOW_OP((res).r,+,(a).r)\ + CHECK_OVERFLOW_OP((res).i,+,(a).i)\ + (res).r += (a).r; (res).i += (a).i;\ + }while(0) + +#define C_SUBFROM( res , a)\ + do {\ + CHECK_OVERFLOW_OP((res).r,-,(a).r)\ + CHECK_OVERFLOW_OP((res).i,-,(a).i)\ + (res).r -= (a).r; (res).i -= (a).i; \ + }while(0) + + +#ifdef FIXED_POINT +# define KISS_FFT_COS(phase) floor(.5+SAMP_MAX * cos (phase)) +# define KISS_FFT_SIN(phase) floor(.5+SAMP_MAX * sin (phase)) +# define HALF_OF(x) ((x)>>1) +#elif defined(USE_SIMD) +# define KISS_FFT_COS(phase) _mm_set1_ps( cos(phase) ) +# define KISS_FFT_SIN(phase) _mm_set1_ps( sin(phase) ) +# define HALF_OF(x) ((x)*_mm_set1_ps(.5)) +#else +# define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase) +# define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase) +# define HALF_OF(x) ((x)*.5) +#endif + +#define kf_cexp(x,phase) \ + do{ \ + (x)->r = KISS_FFT_COS(phase);\ + (x)->i = KISS_FFT_SIN(phase);\ + }while(0) + + +/* a debugging function */ +#define pcpx(c)\ + fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) ) + + +#ifdef KISS_FFT_USE_ALLOCA +// define this to allow use of alloca instead of malloc for temporary buffers +// Temporary buffers are used in two case: +// 1. FFT sizes that have "bad" factors. i.e. not 2,3 and 5 +// 2. "in-place" FFTs. Notice the quotes, since kissfft does not really do an in-place transform. +#include +#define KISS_FFT_TMP_ALLOC(nbytes) alloca(nbytes) +#define KISS_FFT_TMP_FREE(ptr) +#else +#define KISS_FFT_TMP_ALLOC(nbytes) KISS_FFT_MALLOC(nbytes) +#define KISS_FFT_TMP_FREE(ptr) KISS_FFT_FREE(ptr) +#endif diff --git a/third_party/kissfft/kiss_fft.c b/third_party/kissfft/kiss_fft.c new file mode 100644 index 00000000..465d6c97 --- /dev/null +++ b/third_party/kissfft/kiss_fft.c @@ -0,0 +1,408 @@ +/* +Copyright (c) 2003-2010, Mark Borgerding + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + + +#include "_kiss_fft_guts.h" +/* The guts header contains all the multiplication and addition macros that are defined for + fixed or floating point complex numbers. It also delares the kf_ internal functions. + */ + +static void kf_bfly2( + kiss_fft_cpx * Fout, + const size_t fstride, + const kiss_fft_cfg st, + int m + ) +{ + kiss_fft_cpx * Fout2; + kiss_fft_cpx * tw1 = st->twiddles; + kiss_fft_cpx t; + Fout2 = Fout + m; + do{ + C_FIXDIV(*Fout,2); C_FIXDIV(*Fout2,2); + + C_MUL (t, *Fout2 , *tw1); + tw1 += fstride; + C_SUB( *Fout2 , *Fout , t ); + C_ADDTO( *Fout , t ); + ++Fout2; + ++Fout; + }while (--m); +} + +static void kf_bfly4( + kiss_fft_cpx * Fout, + const size_t fstride, + const kiss_fft_cfg st, + const size_t m + ) +{ + kiss_fft_cpx *tw1,*tw2,*tw3; + kiss_fft_cpx scratch[6]; + size_t k=m; + const size_t m2=2*m; + const size_t m3=3*m; + + + tw3 = tw2 = tw1 = st->twiddles; + + do { + C_FIXDIV(*Fout,4); C_FIXDIV(Fout[m],4); C_FIXDIV(Fout[m2],4); C_FIXDIV(Fout[m3],4); + + C_MUL(scratch[0],Fout[m] , *tw1 ); + C_MUL(scratch[1],Fout[m2] , *tw2 ); + C_MUL(scratch[2],Fout[m3] , *tw3 ); + + C_SUB( scratch[5] , *Fout, scratch[1] ); + C_ADDTO(*Fout, scratch[1]); + C_ADD( scratch[3] , scratch[0] , scratch[2] ); + C_SUB( scratch[4] , scratch[0] , scratch[2] ); + C_SUB( Fout[m2], *Fout, scratch[3] ); + tw1 += fstride; + tw2 += fstride*2; + tw3 += fstride*3; + C_ADDTO( *Fout , scratch[3] ); + + if(st->inverse) { + Fout[m].r = scratch[5].r - scratch[4].i; + Fout[m].i = scratch[5].i + scratch[4].r; + Fout[m3].r = scratch[5].r + scratch[4].i; + Fout[m3].i = scratch[5].i - scratch[4].r; + }else{ + Fout[m].r = scratch[5].r + scratch[4].i; + Fout[m].i = scratch[5].i - scratch[4].r; + Fout[m3].r = scratch[5].r - scratch[4].i; + Fout[m3].i = scratch[5].i + scratch[4].r; + } + ++Fout; + }while(--k); +} + +static void kf_bfly3( + kiss_fft_cpx * Fout, + const size_t fstride, + const kiss_fft_cfg st, + size_t m + ) +{ + size_t k=m; + const size_t m2 = 2*m; + kiss_fft_cpx *tw1,*tw2; + kiss_fft_cpx scratch[5]; + kiss_fft_cpx epi3; + epi3 = st->twiddles[fstride*m]; + + tw1=tw2=st->twiddles; + + do{ + C_FIXDIV(*Fout,3); C_FIXDIV(Fout[m],3); C_FIXDIV(Fout[m2],3); + + C_MUL(scratch[1],Fout[m] , *tw1); + C_MUL(scratch[2],Fout[m2] , *tw2); + + C_ADD(scratch[3],scratch[1],scratch[2]); + C_SUB(scratch[0],scratch[1],scratch[2]); + tw1 += fstride; + tw2 += fstride*2; + + Fout[m].r = Fout->r - HALF_OF(scratch[3].r); + Fout[m].i = Fout->i - HALF_OF(scratch[3].i); + + C_MULBYSCALAR( scratch[0] , epi3.i ); + + C_ADDTO(*Fout,scratch[3]); + + Fout[m2].r = Fout[m].r + scratch[0].i; + Fout[m2].i = Fout[m].i - scratch[0].r; + + Fout[m].r -= scratch[0].i; + Fout[m].i += scratch[0].r; + + ++Fout; + }while(--k); +} + +static void kf_bfly5( + kiss_fft_cpx * Fout, + const size_t fstride, + const kiss_fft_cfg st, + int m + ) +{ + kiss_fft_cpx *Fout0,*Fout1,*Fout2,*Fout3,*Fout4; + int u; + kiss_fft_cpx scratch[13]; + kiss_fft_cpx * twiddles = st->twiddles; + kiss_fft_cpx *tw; + kiss_fft_cpx ya,yb; + ya = twiddles[fstride*m]; + yb = twiddles[fstride*2*m]; + + Fout0=Fout; + Fout1=Fout0+m; + Fout2=Fout0+2*m; + Fout3=Fout0+3*m; + Fout4=Fout0+4*m; + + tw=st->twiddles; + for ( u=0; ur += scratch[7].r + scratch[8].r; + Fout0->i += scratch[7].i + scratch[8].i; + + scratch[5].r = scratch[0].r + S_MUL(scratch[7].r,ya.r) + S_MUL(scratch[8].r,yb.r); + scratch[5].i = scratch[0].i + S_MUL(scratch[7].i,ya.r) + S_MUL(scratch[8].i,yb.r); + + scratch[6].r = S_MUL(scratch[10].i,ya.i) + S_MUL(scratch[9].i,yb.i); + scratch[6].i = -S_MUL(scratch[10].r,ya.i) - S_MUL(scratch[9].r,yb.i); + + C_SUB(*Fout1,scratch[5],scratch[6]); + C_ADD(*Fout4,scratch[5],scratch[6]); + + scratch[11].r = scratch[0].r + S_MUL(scratch[7].r,yb.r) + S_MUL(scratch[8].r,ya.r); + scratch[11].i = scratch[0].i + S_MUL(scratch[7].i,yb.r) + S_MUL(scratch[8].i,ya.r); + scratch[12].r = - S_MUL(scratch[10].i,yb.i) + S_MUL(scratch[9].i,ya.i); + scratch[12].i = S_MUL(scratch[10].r,yb.i) - S_MUL(scratch[9].r,ya.i); + + C_ADD(*Fout2,scratch[11],scratch[12]); + C_SUB(*Fout3,scratch[11],scratch[12]); + + ++Fout0;++Fout1;++Fout2;++Fout3;++Fout4; + } +} + +/* perform the butterfly for one stage of a mixed radix FFT */ +static void kf_bfly_generic( + kiss_fft_cpx * Fout, + const size_t fstride, + const kiss_fft_cfg st, + int m, + int p + ) +{ + int u,k,q1,q; + kiss_fft_cpx * twiddles = st->twiddles; + kiss_fft_cpx t; + int Norig = st->nfft; + + kiss_fft_cpx * scratch = (kiss_fft_cpx*)KISS_FFT_TMP_ALLOC(sizeof(kiss_fft_cpx)*p); + + for ( u=0; u=Norig) twidx-=Norig; + C_MUL(t,scratch[q] , twiddles[twidx] ); + C_ADDTO( Fout[ k ] ,t); + } + k += m; + } + } + KISS_FFT_TMP_FREE(scratch); +} + +static +void kf_work( + kiss_fft_cpx * Fout, + const kiss_fft_cpx * f, + const size_t fstride, + int in_stride, + int * factors, + const kiss_fft_cfg st + ) +{ + kiss_fft_cpx * Fout_beg=Fout; + const int p=*factors++; /* the radix */ + const int m=*factors++; /* stage's fft length/p */ + const kiss_fft_cpx * Fout_end = Fout + p*m; + +#ifdef _OPENMP + // use openmp extensions at the + // top-level (not recursive) + if (fstride==1 && p<=5) + { + int k; + + // execute the p different work units in different threads +# pragma omp parallel for + for (k=0;k floor_sqrt) + p = n; /* no more factors, skip to end */ + } + n /= p; + *facbuf++ = p; + *facbuf++ = n; + } while (n > 1); +} + +/* + * + * User-callable function to allocate all necessary storage space for the fft. + * + * The return value is a contiguous block of memory, allocated with malloc. As such, + * It can be freed with free(), rather than a kiss_fft-specific function. + * */ +kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem ) +{ + kiss_fft_cfg st=NULL; + size_t memneeded = sizeof(struct kiss_fft_state) + + sizeof(kiss_fft_cpx)*(nfft-1); /* twiddle factors*/ + + if ( lenmem==NULL ) { + st = ( kiss_fft_cfg)KISS_FFT_MALLOC( memneeded ); + }else{ + if (mem != NULL && *lenmem >= memneeded) + st = (kiss_fft_cfg)mem; + *lenmem = memneeded; + } + if (st) { + int i; + st->nfft=nfft; + st->inverse = inverse_fft; + + for (i=0;iinverse) + phase *= -1; + kf_cexp(st->twiddles+i, phase ); + } + + kf_factor(nfft,st->factors); + } + return st; +} + + +void kiss_fft_stride(kiss_fft_cfg st,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int in_stride) +{ + if (fin == fout) { + //NOTE: this is not really an in-place FFT algorithm. + //It just performs an out-of-place FFT into a temp buffer + kiss_fft_cpx * tmpbuf = (kiss_fft_cpx*)KISS_FFT_TMP_ALLOC( sizeof(kiss_fft_cpx)*st->nfft); + kf_work(tmpbuf,fin,1,in_stride, st->factors,st); + memcpy(fout,tmpbuf,sizeof(kiss_fft_cpx)*st->nfft); + KISS_FFT_TMP_FREE(tmpbuf); + }else{ + kf_work( fout, fin, 1,in_stride, st->factors,st ); + } +} + +void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout) +{ + kiss_fft_stride(cfg,fin,fout,1); +} + + +void kiss_fft_cleanup(void) +{ + // nothing needed any more +} + +int kiss_fft_next_fast_size(int n) +{ + while(1) { + int m=n; + while ( (m%2) == 0 ) m/=2; + while ( (m%3) == 0 ) m/=3; + while ( (m%5) == 0 ) m/=5; + if (m<=1) + break; /* n is completely factorable by twos, threes, and fives */ + n++; + } + return n; +} diff --git a/third_party/kissfft/kiss_fft.h b/third_party/kissfft/kiss_fft.h new file mode 100644 index 00000000..64c50f4a --- /dev/null +++ b/third_party/kissfft/kiss_fft.h @@ -0,0 +1,124 @@ +#ifndef KISS_FFT_H +#define KISS_FFT_H + +#include +#include +#include +#include + +#ifdef __cplusplus +extern "C" { +#endif + +/* + ATTENTION! + If you would like a : + -- a utility that will handle the caching of fft objects + -- real-only (no imaginary time component ) FFT + -- a multi-dimensional FFT + -- a command-line utility to perform ffts + -- a command-line utility to perform fast-convolution filtering + + Then see kfc.h kiss_fftr.h kiss_fftnd.h fftutil.c kiss_fastfir.c + in the tools/ directory. +*/ + +#ifdef USE_SIMD +# include +# define kiss_fft_scalar __m128 +#define KISS_FFT_MALLOC(nbytes) _mm_malloc(nbytes,16) +#define KISS_FFT_FREE _mm_free +#else +#define KISS_FFT_MALLOC malloc +#define KISS_FFT_FREE free +#endif + + +#ifdef FIXED_POINT +#include +# if (FIXED_POINT == 32) +# define kiss_fft_scalar int32_t +# else +# define kiss_fft_scalar int16_t +# endif +#else +# ifndef kiss_fft_scalar +/* default is float */ +# define kiss_fft_scalar float +# endif +#endif + +typedef struct { + kiss_fft_scalar r; + kiss_fft_scalar i; +}kiss_fft_cpx; + +typedef struct kiss_fft_state* kiss_fft_cfg; + +/* + * kiss_fft_alloc + * + * Initialize a FFT (or IFFT) algorithm's cfg/state buffer. + * + * typical usage: kiss_fft_cfg mycfg=kiss_fft_alloc(1024,0,NULL,NULL); + * + * The return value from fft_alloc is a cfg buffer used internally + * by the fft routine or NULL. + * + * If lenmem is NULL, then kiss_fft_alloc will allocate a cfg buffer using malloc. + * The returned value should be free()d when done to avoid memory leaks. + * + * The state can be placed in a user supplied buffer 'mem': + * If lenmem is not NULL and mem is not NULL and *lenmem is large enough, + * then the function places the cfg in mem and the size used in *lenmem + * and returns mem. + * + * If lenmem is not NULL and ( mem is NULL or *lenmem is not large enough), + * then the function returns NULL and places the minimum cfg + * buffer size in *lenmem. + * */ + +kiss_fft_cfg kiss_fft_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem); + +/* + * kiss_fft(cfg,in_out_buf) + * + * Perform an FFT on a complex input buffer. + * for a forward FFT, + * fin should be f[0] , f[1] , ... ,f[nfft-1] + * fout will be F[0] , F[1] , ... ,F[nfft-1] + * Note that each element is complex and can be accessed like + f[k].r and f[k].i + * */ +void kiss_fft(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout); + +/* + A more generic version of the above function. It reads its input from every Nth sample. + * */ +void kiss_fft_stride(kiss_fft_cfg cfg,const kiss_fft_cpx *fin,kiss_fft_cpx *fout,int fin_stride); + +/* If kiss_fft_alloc allocated a buffer, it is one contiguous + buffer and can be simply free()d when no longer needed*/ +#define kiss_fft_free free + +/* + Cleans up some memory that gets managed internally. Not necessary to call, but it might clean up + your compiler output to call this before you exit. +*/ +void kiss_fft_cleanup(void); + + +/* + * Returns the smallest integer k, such that k>=n and k has only "fast" factors (2,3,5) + */ +int kiss_fft_next_fast_size(int n); + +/* for real ffts, we need an even size */ +#define kiss_fftr_next_fast_size_real(n) \ + (kiss_fft_next_fast_size( ((n)+1)>>1)<<1) + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/third_party/kissfft/kiss_fftr.c b/third_party/kissfft/kiss_fftr.c new file mode 100644 index 00000000..b8e238b1 --- /dev/null +++ b/third_party/kissfft/kiss_fftr.c @@ -0,0 +1,159 @@ +/* +Copyright (c) 2003-2004, Mark Borgerding + +All rights reserved. + +Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: + + * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. + * Neither the author nor the names of any contributors may be used to endorse or promote products derived from this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#include "kiss_fftr.h" +#include "_kiss_fft_guts.h" + +struct kiss_fftr_state{ + kiss_fft_cfg substate; + kiss_fft_cpx * tmpbuf; + kiss_fft_cpx * super_twiddles; +#ifdef USE_SIMD + void * pad; +#endif +}; + +kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem,size_t * lenmem) +{ + int i; + kiss_fftr_cfg st = NULL; + size_t subsize, memneeded; + + if (nfft & 1) { + fprintf(stderr,"Real FFT optimization must be even.\n"); + return NULL; + } + nfft >>= 1; + + kiss_fft_alloc (nfft, inverse_fft, NULL, &subsize); + memneeded = sizeof(struct kiss_fftr_state) + subsize + sizeof(kiss_fft_cpx) * ( nfft * 3 / 2); + + if (lenmem == NULL) { + st = (kiss_fftr_cfg) KISS_FFT_MALLOC (memneeded); + } else { + if (*lenmem >= memneeded) + st = (kiss_fftr_cfg) mem; + *lenmem = memneeded; + } + if (!st) + return NULL; + + st->substate = (kiss_fft_cfg) (st + 1); /*just beyond kiss_fftr_state struct */ + st->tmpbuf = (kiss_fft_cpx *) (((char *) st->substate) + subsize); + st->super_twiddles = st->tmpbuf + nfft; + kiss_fft_alloc(nfft, inverse_fft, st->substate, &subsize); + + for (i = 0; i < nfft/2; ++i) { + double phase = + -3.14159265358979323846264338327 * ((double) (i+1) / nfft + .5); + if (inverse_fft) + phase *= -1; + kf_cexp (st->super_twiddles+i,phase); + } + return st; +} + +void kiss_fftr(kiss_fftr_cfg st,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata) +{ + /* input buffer timedata is stored row-wise */ + int k,ncfft; + kiss_fft_cpx fpnk,fpk,f1k,f2k,tw,tdc; + + if ( st->substate->inverse) { + fprintf(stderr,"kiss fft usage error: improper alloc\n"); + exit(1); + } + + ncfft = st->substate->nfft; + + /*perform the parallel fft of two real signals packed in real,imag*/ + kiss_fft( st->substate , (const kiss_fft_cpx*)timedata, st->tmpbuf ); + /* The real part of the DC element of the frequency spectrum in st->tmpbuf + * contains the sum of the even-numbered elements of the input time sequence + * The imag part is the sum of the odd-numbered elements + * + * The sum of tdc.r and tdc.i is the sum of the input time sequence. + * yielding DC of input time sequence + * The difference of tdc.r - tdc.i is the sum of the input (dot product) [1,-1,1,-1... + * yielding Nyquist bin of input time sequence + */ + + tdc.r = st->tmpbuf[0].r; + tdc.i = st->tmpbuf[0].i; + C_FIXDIV(tdc,2); + CHECK_OVERFLOW_OP(tdc.r ,+, tdc.i); + CHECK_OVERFLOW_OP(tdc.r ,-, tdc.i); + freqdata[0].r = tdc.r + tdc.i; + freqdata[ncfft].r = tdc.r - tdc.i; +#ifdef USE_SIMD + freqdata[ncfft].i = freqdata[0].i = _mm_set1_ps(0); +#else + freqdata[ncfft].i = freqdata[0].i = 0; +#endif + + for ( k=1;k <= ncfft/2 ; ++k ) { + fpk = st->tmpbuf[k]; + fpnk.r = st->tmpbuf[ncfft-k].r; + fpnk.i = - st->tmpbuf[ncfft-k].i; + C_FIXDIV(fpk,2); + C_FIXDIV(fpnk,2); + + C_ADD( f1k, fpk , fpnk ); + C_SUB( f2k, fpk , fpnk ); + C_MUL( tw , f2k , st->super_twiddles[k-1]); + + freqdata[k].r = HALF_OF(f1k.r + tw.r); + freqdata[k].i = HALF_OF(f1k.i + tw.i); + freqdata[ncfft-k].r = HALF_OF(f1k.r - tw.r); + freqdata[ncfft-k].i = HALF_OF(tw.i - f1k.i); + } +} + +void kiss_fftri(kiss_fftr_cfg st,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata) +{ + /* input buffer timedata is stored row-wise */ + int k, ncfft; + + if (st->substate->inverse == 0) { + fprintf (stderr, "kiss fft usage error: improper alloc\n"); + exit (1); + } + + ncfft = st->substate->nfft; + + st->tmpbuf[0].r = freqdata[0].r + freqdata[ncfft].r; + st->tmpbuf[0].i = freqdata[0].r - freqdata[ncfft].r; + C_FIXDIV(st->tmpbuf[0],2); + + for (k = 1; k <= ncfft / 2; ++k) { + kiss_fft_cpx fk, fnkc, fek, fok, tmp; + fk = freqdata[k]; + fnkc.r = freqdata[ncfft - k].r; + fnkc.i = -freqdata[ncfft - k].i; + C_FIXDIV( fk , 2 ); + C_FIXDIV( fnkc , 2 ); + + C_ADD (fek, fk, fnkc); + C_SUB (tmp, fk, fnkc); + C_MUL (fok, tmp, st->super_twiddles[k-1]); + C_ADD (st->tmpbuf[k], fek, fok); + C_SUB (st->tmpbuf[ncfft - k], fek, fok); +#ifdef USE_SIMD + st->tmpbuf[ncfft - k].i *= _mm_set1_ps(-1.0); +#else + st->tmpbuf[ncfft - k].i *= -1; +#endif + } + kiss_fft (st->substate, st->tmpbuf, (kiss_fft_cpx *) timedata); +} diff --git a/third_party/kissfft/kiss_fftr.h b/third_party/kissfft/kiss_fftr.h new file mode 100644 index 00000000..72e5a577 --- /dev/null +++ b/third_party/kissfft/kiss_fftr.h @@ -0,0 +1,46 @@ +#ifndef KISS_FTR_H +#define KISS_FTR_H + +#include "kiss_fft.h" +#ifdef __cplusplus +extern "C" { +#endif + + +/* + + Real optimized version can save about 45% cpu time vs. complex fft of a real seq. + + + + */ + +typedef struct kiss_fftr_state *kiss_fftr_cfg; + + +kiss_fftr_cfg kiss_fftr_alloc(int nfft,int inverse_fft,void * mem, size_t * lenmem); +/* + nfft must be even + + If you don't care to allocate space, use mem = lenmem = NULL +*/ + + +void kiss_fftr(kiss_fftr_cfg cfg,const kiss_fft_scalar *timedata,kiss_fft_cpx *freqdata); +/* + input timedata has nfft scalar points + output freqdata has nfft/2+1 complex points +*/ + +void kiss_fftri(kiss_fftr_cfg cfg,const kiss_fft_cpx *freqdata,kiss_fft_scalar *timedata); +/* + input freqdata has nfft/2+1 complex points + output timedata has nfft scalar points +*/ + +#define kiss_fftr_free free + +#ifdef __cplusplus +} +#endif +#endif