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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,116 @@ | ||
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| /** $VER: SharedBuffer.cpp (2024.06.26) P. Stuer **/ | ||
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| #include "pch.h" | ||
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| #include "SharedBuffer.h" | ||
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| #include "Encoding.h" | ||
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| #pragma hdrstop | ||
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| using namespace Microsoft::WRL; | ||
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| /// <summary> | ||
| /// Ensures that a buffer of the correct size is posted to the WebView. | ||
| /// </summary> | ||
| HRESULT SharedBuffer::Ensure(wil::com_ptr<ICoreWebView2Environment> & environment, wil::com_ptr<ICoreWebView2> & webView, size_t sampleCount, uint32_t sampleRate, uint32_t channelCount, uint32_t channelConfig) noexcept | ||
| { | ||
| if ((_Buffer != nullptr) && (_SampleCount == sampleCount) && (_SampleRate == sampleRate) && (_ChannelCount == channelCount) && (_ChannelConfig == channelConfig)) | ||
| return S_OK; | ||
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| Release(); | ||
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| HRESULT hr = environment->QueryInterface(IID_PPV_ARGS(&_Environment12)); | ||
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| if (!SUCCEEDED(hr)) | ||
| return hr; | ||
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| _WebView17 = webView.try_query<ICoreWebView2_17>(); | ||
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| if (_WebView17 == nullptr) | ||
| return E_NOINTERFACE; | ||
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| _Size = sizeof(double) * sampleCount * channelCount; // Don't use audio_sample. | ||
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| hr = _Environment12->CreateSharedBuffer(_Size, &_SharedBuffer); | ||
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| if (!SUCCEEDED(hr)) | ||
| return hr; | ||
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| hr = _SharedBuffer->get_Buffer(&_Buffer); | ||
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| if (!SUCCEEDED(hr)) | ||
| return hr; | ||
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| std::wstring AdditionalDataAsJson = ::FormatText(L"{\"SampleCount\":%d,\"SampleRate\":%d,\"ChannelCount\":%d,\"ChannelConfig\":%d}", (int) sampleCount, (int) sampleRate, (int) channelCount, (int) channelConfig); | ||
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| hr = _WebView17->PostSharedBufferToScript(_SharedBuffer.get(), COREWEBVIEW2_SHARED_BUFFER_ACCESS_READ_WRITE, AdditionalDataAsJson.c_str()); | ||
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| if (!SUCCEEDED(hr)) | ||
| return hr; | ||
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| _SampleCount = sampleCount; | ||
| _SampleRate = sampleRate; | ||
| _ChannelCount = channelCount; | ||
| _ChannelConfig = channelConfig; | ||
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| return S_OK; | ||
| } | ||
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| /// <summary> | ||
| /// Releases the resources of this instance. | ||
| /// </summary> | ||
| void SharedBuffer::Release() noexcept | ||
| { | ||
| _SampleRate = 0; | ||
| _ChannelCount = 0; | ||
| _SampleCount = 0; | ||
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| _Buffer = nullptr; | ||
| _SharedBuffer = nullptr; | ||
| _WebView17 = nullptr; | ||
| _Environment12 = nullptr; | ||
| } | ||
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| /// <summary> | ||
| /// Copies data to the buffer. | ||
| /// </summary> | ||
| void SharedBuffer::Copy(const BYTE * data, size_t size) noexcept | ||
| { | ||
| if (_Buffer == nullptr) | ||
| return; | ||
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| if (_Size < size) | ||
| size = (size_t) _Size; | ||
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| ::memcpy(_Buffer, data, size); | ||
| } | ||
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| /// <summary> | ||
| /// Fills the buffer with samples converted from 32-bit to 64-floats. | ||
| /// </summary> | ||
| void SharedBuffer::Convert(const float * sampleData, size_t sampleCount) noexcept | ||
| { | ||
| if (_Buffer == nullptr) | ||
| return; | ||
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| size_t Size = sizeof(double) * sampleCount * _ChannelCount; | ||
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| if (_Size < Size) | ||
| sampleCount = _SampleCount; | ||
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| const float * p = sampleData; | ||
| double * q = (double *) _Buffer; | ||
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| for (size_t i = 0; i < sampleCount * _ChannelCount; ++i) | ||
| *q++ = (double) *p++; | ||
| } | ||
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| /// <summary> | ||
| /// Deletes this instance. | ||
| /// </summary> | ||
| SharedBuffer::~SharedBuffer() | ||
| { | ||
| Release(); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
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| /** $VER: SharedBuffer.h (2024.06.26) P. Stuer - Implements a buffer shared by the component and WebView. **/ | ||
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| #pragma once | ||
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| #include "framework.h" | ||
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| #include <wrl.h> | ||
| #include <wil/com.h> | ||
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| #include <WebView2.h> | ||
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| /// <summary> | ||
| /// Implements a shared buffer. | ||
| /// </summary> | ||
| class SharedBuffer | ||
| { | ||
| public: | ||
| SharedBuffer() : _SampleCount(), _SampleRate(), _ChannelCount(), _ChannelConfig() { } | ||
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| virtual ~SharedBuffer(); | ||
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| HRESULT Ensure(wil::com_ptr<ICoreWebView2Environment> & environment, wil::com_ptr<ICoreWebView2> & webView, size_t sampleCount, uint32_t sampleRate, uint32_t channelCount, uint32_t channelConfig) noexcept; | ||
| void Release() noexcept; | ||
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| void Copy(const BYTE * data, size_t size) noexcept; | ||
| void Convert(const float * sampleData, size_t sampleCount) noexcept; | ||
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| private: | ||
| size_t _SampleCount; | ||
| uint32_t _SampleRate; | ||
| uint32_t _ChannelCount; | ||
| uint32_t _ChannelConfig; | ||
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| wil::com_ptr<ICoreWebView2Environment12> _Environment12; | ||
| wil::com_ptr<ICoreWebView2_17> _WebView17; | ||
| wil::com_ptr<ICoreWebView2SharedBuffer> _SharedBuffer; | ||
| UINT64 _Size; | ||
| BYTE * _Buffer; | ||
| }; |
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