System: Add video capture feature

src/util/CMakeLists.txt

@@ -44,6 +44,8 @@ add_library(util
   input_source.h
   iso_reader.cpp
   iso_reader.h
+  media_capture.cpp
+  media_capture.h
   page_fault_handler.cpp
   page_fault_handler.h
   platform_misc.h

src/util/media_capture.h

@@ -0,0 +1,75 @@
+// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#pragma once
+
+#include "gpu_texture.h"
+
+#include <ctime>
+#include <memory>
+#include <string>
+#include <string_view>
+#include <vector>
+
+class Error;
+class GPUTexture;
+
+enum class MediaCaptureBackend : u8
+{
+#ifdef _WIN32
+  MediaFoundation,
+#endif
+#ifndef __ANDROID__
+  FFMPEG,
+#endif
+  MaxCount,
+};
+
+class MediaCapture
+{
+public:
+  virtual ~MediaCapture();
+
+  using ContainerName = std::pair<std::string, std::string>; // configname,longname
+  using ContainerList = std::vector<ContainerName>;
+  using CodecName = std::pair<std::string, std::string>; // configname,longname
+  using CodecList = std::vector<CodecName>;
+
+  static std::optional<MediaCaptureBackend> ParseBackendName(const char* str);
+  static const char* GetBackendName(MediaCaptureBackend backend);
+  static const char* GetBackendDisplayName(MediaCaptureBackend backend);
+
+  static ContainerList GetContainerList(MediaCaptureBackend backend);
+  static CodecList GetVideoCodecList(MediaCaptureBackend backend, const char* container);
+  static CodecList GetAudioCodecList(MediaCaptureBackend backend, const char* container);
+
+  static void AdjustVideoSize(u32* width, u32* height);
+
+  static std::unique_ptr<MediaCapture> Create(MediaCaptureBackend backend, Error* error);
+
+  virtual bool BeginCapture(float fps, float aspect, u32 width, u32 height, GPUTexture::Format texture_format,
+                            u32 sample_rate, std::string path, bool capture_video, std::string_view video_codec,
+                            u32 video_bitrate, std::string_view video_codec_args, bool capture_audio,
+                            std::string_view audio_codec, u32 audio_bitrate, std::string_view audio_codec_args,
+                            Error* error) = 0;
+  virtual bool EndCapture(Error* error) = 0;
+
+  // TODO: make non-virtual?
+  virtual const std::string& GetPath() const = 0;
+  virtual bool IsCapturingAudio() const = 0;
+  virtual bool IsCapturingVideo() const = 0;
+  virtual u32 GetVideoWidth() const = 0;
+  virtual u32 GetVideoHeight() const = 0;
+
+  /// Returns the elapsed time in seconds.
+  virtual time_t GetElapsedTime() const = 0;
+
+  virtual float GetCaptureThreadUsage() const = 0;
+  virtual float GetCaptureThreadTime() const = 0;
+  virtual void UpdateCaptureThreadUsage(double pct_divider, double time_divider) = 0;
+
+  virtual GPUTexture* GetRenderTexture() = 0;
+  virtual bool DeliverVideoFrame(GPUTexture* stex) = 0;
+  virtual bool DeliverAudioFrames(const s16* frames, u32 num_frames) = 0;
+  virtual void Flush() = 0;
+};

src/util/util.props

@@ -13,7 +13,7 @@
 
   <ItemDefinitionGroup>
     <Link>
-      <AdditionalDependencies>%(AdditionalDependencies);d3d11.lib;d3d12.lib;d3dcompiler.lib;dxgi.lib;Dwmapi.lib;winhttp.lib</AdditionalDependencies>
+      <AdditionalDependencies>%(AdditionalDependencies);d3d11.lib;d3d12.lib;d3dcompiler.lib;dxgi.lib;Dwmapi.lib;winhttp.lib;Mfplat.lib;Mfreadwrite.lib</AdditionalDependencies>
       <AdditionalDependencies Condition="'$(Platform)'!='ARM64'">%(AdditionalDependencies);opengl32.lib</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>

src/util/util.vcxproj

@@ -36,6 +36,7 @@
     <ClInclude Include="input_manager.h" />
     <ClInclude Include="input_source.h" />
     <ClInclude Include="iso_reader.h" />
+    <ClInclude Include="media_capture.h" />
     <ClInclude Include="metal_device.h">
       <ExcludedFromBuild>true</ExcludedFromBuild>
     </ClInclude>
@@ -146,6 +147,7 @@
     <ClCompile Include="input_source.cpp" />
     <ClCompile Include="iso_reader.cpp" />
     <ClCompile Include="cd_subchannel_replacement.cpp" />
+    <ClCompile Include="media_capture.cpp" />
     <ClCompile Include="opengl_context.cpp">
       <ExcludedFromBuild Condition="'$(Platform)'=='ARM64'">true</ExcludedFromBuild>
     </ClCompile>

src/util/util.vcxproj.filters

@@ -71,6 +71,7 @@
     <ClInclude Include="opengl_context_wgl.h" />
     <ClInclude Include="image.h" />
     <ClInclude Include="sockets.h" />
+    <ClInclude Include="media_capture.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="state_wrapper.cpp" />
@@ -150,6 +151,7 @@
     <ClCompile Include="image.cpp" />
     <ClCompile Include="sdl_audio_stream.cpp" />
     <ClCompile Include="sockets.cpp" />
+    <ClCompile Include="media_capture.cpp" />
   </ItemGroup>
   <ItemGroup>
     <None Include="metal_shaders.metal" />