| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef MEDIA_GPU_WINDOWS_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_ |
| #define MEDIA_GPU_WINDOWS_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_ |
| |
| #include <mfapi.h> |
| #include <mfidl.h> |
| #include <stdint.h> |
| #include <strmif.h> |
| #include <wrl/client.h> |
| |
| #include <memory> |
| |
| #include "base/bind.h" |
| #include "base/containers/circular_deque.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread.h" |
| #include "media/gpu/media_gpu_export.h" |
| #include "media/video/video_encode_accelerator.h" |
| |
| namespace media { |
| |
| // Media Foundation implementation of the VideoEncodeAccelerator interface for |
| // Windows. |
| // This class saves the task runner on which it is constructed and runs client |
| // callbacks using that same task runner. |
| // This class has DCHECKs to makes sure that methods are called in the |
| // correct task runners. It starts an internal encoder thread on which |
| // VideoEncodeAccelerator implementation tasks are posted. |
| class MEDIA_GPU_EXPORT MediaFoundationVideoEncodeAccelerator |
| : public VideoEncodeAccelerator { |
| public: |
| // If |compatible_with_win7| is true, MediaFoundationVideoEncoderAccelerator |
| // works on Windows 7. Some attributes of the encoder are not supported on old |
| // systems, which may impact the performance or quality of the output. |
| explicit MediaFoundationVideoEncodeAccelerator(bool compatible_with_win7); |
| |
| // VideoEncodeAccelerator implementation. |
| VideoEncodeAccelerator::SupportedProfiles GetSupportedProfiles() override; |
| bool Initialize(const Config& config, Client* client) override; |
| void Encode(const scoped_refptr<VideoFrame>& frame, |
| bool force_keyframe) override; |
| void UseOutputBitstreamBuffer(const BitstreamBuffer& buffer) override; |
| void RequestEncodingParametersChange(uint32_t bitrate, |
| uint32_t framerate) override; |
| void Destroy() override; |
| |
| // Preload dlls required for encoding. Returns true if all required dlls are |
| // correctly loaded. |
| static bool PreSandboxInitialization(); |
| |
| protected: |
| ~MediaFoundationVideoEncodeAccelerator() override; |
| |
| private: |
| // Holds output buffers coming from the client ready to be filled. |
| struct BitstreamBufferRef; |
| |
| // Holds output buffers coming from the encoder. |
| class EncodeOutput; |
| |
| // Creates an hardware encoder backed IMFTransform instance on |encoder_|. |
| bool CreateHardwareEncoderMFT(); |
| |
| // Initializes and allocates memory for input and output samples. |
| bool InitializeInputOutputSamples(VideoCodecProfile output_profile); |
| |
| // Initializes encoder parameters for real-time use. |
| bool SetEncoderModes(); |
| |
| // Returns true if we can initialize input and output samples with the given |
| // frame size, otherwise false. |
| bool IsResolutionSupported(const gfx::Size& size); |
| |
| // Helper function to notify the client of an error on |
| // |main_client_task_runner_|. |
| void NotifyError(VideoEncodeAccelerator::Error error); |
| |
| // Encoding tasks to be run on |encoder_thread_|. |
| void EncodeTask(scoped_refptr<VideoFrame> frame, bool force_keyframe); |
| |
| // Checks for and copies encoded output on |encoder_thread_|. |
| void ProcessOutput(); |
| |
| // Inserts the output buffers for reuse on |encoder_thread_|. |
| void UseOutputBitstreamBufferTask( |
| std::unique_ptr<BitstreamBufferRef> buffer_ref); |
| |
| // Copies EncodeOutput into a BitstreamBuffer and returns it to the |
| // |main_client_|. |
| void ReturnBitstreamBuffer( |
| std::unique_ptr<EncodeOutput> encode_output, |
| std::unique_ptr<MediaFoundationVideoEncodeAccelerator::BitstreamBufferRef> |
| buffer_ref); |
| |
| // Changes encode parameters on |encoder_thread_|. |
| void RequestEncodingParametersChangeTask(uint32_t bitrate, |
| uint32_t framerate); |
| |
| // Destroys encode session on |encoder_thread_|. |
| void DestroyTask(); |
| |
| // Releases resources encoder holds. |
| void ReleaseEncoderResources(); |
| |
| const bool compatible_with_win7_; |
| |
| // Bitstream buffers ready to be used to return encoded output as a FIFO. |
| base::circular_deque<std::unique_ptr<BitstreamBufferRef>> |
| bitstream_buffer_queue_; |
| |
| // EncodeOutput needs to be copied into a BitstreamBufferRef as a FIFO. |
| base::circular_deque<std::unique_ptr<EncodeOutput>> encoder_output_queue_; |
| |
| gfx::Size input_visible_size_; |
| size_t bitstream_buffer_size_; |
| uint32_t frame_rate_; |
| uint32_t target_bitrate_; |
| size_t u_plane_offset_; |
| size_t v_plane_offset_; |
| size_t y_stride_; |
| size_t u_stride_; |
| size_t v_stride_; |
| |
| Microsoft::WRL::ComPtr<IMFTransform> encoder_; |
| Microsoft::WRL::ComPtr<ICodecAPI> codec_api_; |
| |
| DWORD input_stream_id_; |
| DWORD output_stream_id_; |
| |
| Microsoft::WRL::ComPtr<IMFMediaType> imf_input_media_type_; |
| Microsoft::WRL::ComPtr<IMFMediaType> imf_output_media_type_; |
| |
| Microsoft::WRL::ComPtr<IMFSample> input_sample_; |
| Microsoft::WRL::ComPtr<IMFSample> output_sample_; |
| |
| // To expose client callbacks from VideoEncodeAccelerator. |
| // NOTE: all calls to this object *MUST* be executed on |
| // |main_client_task_runner_|. |
| base::WeakPtr<Client> main_client_; |
| std::unique_ptr<base::WeakPtrFactory<Client>> main_client_weak_factory_; |
| scoped_refptr<base::SingleThreadTaskRunner> main_client_task_runner_; |
| |
| // This thread services tasks posted from the VEA API entry points by the |
| // GPU child thread and CompressionCallback() posted from device thread. |
| base::Thread encoder_thread_; |
| scoped_refptr<base::SingleThreadTaskRunner> encoder_thread_task_runner_; |
| |
| // Declared last to ensure that all weak pointers are invalidated before |
| // other destructors run. |
| base::WeakPtrFactory<MediaFoundationVideoEncodeAccelerator> |
| encoder_task_weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MediaFoundationVideoEncodeAccelerator); |
| }; |
| |
| } // namespace media |
| |
| #endif // MEDIA_GPU_WINDOWS_MEDIA_FOUNDATION_VIDEO_ENCODE_ACCELERATOR_WIN_H_ |