dxva_video_decode_accelerator.h revision 116680a4aac90f2aa7413d9095a592090648e557
1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_ 6#define CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_ 7 8#include <d3d9.h> 9// Work around bug in this header by disabling the relevant warning for it. 10// https://connect.microsoft.com/VisualStudio/feedback/details/911260/dxva2api-h-in-win8-sdk-triggers-c4201-with-w4 11#pragma warning(push) 12#pragma warning(disable:4201) 13#include <dxva2api.h> 14#pragma warning(pop) 15#include <list> 16#include <map> 17#include <mfidl.h> 18#include <vector> 19 20#include "base/compiler_specific.h" 21#include "base/memory/linked_ptr.h" 22#include "base/memory/weak_ptr.h" 23#include "base/threading/non_thread_safe.h" 24#include "base/win/scoped_comptr.h" 25#include "content/common/content_export.h" 26#include "media/video/video_decode_accelerator.h" 27 28interface IMFSample; 29interface IDirect3DSurface9; 30 31namespace content { 32 33// Class to provide a DXVA 2.0 based accelerator using the Microsoft Media 34// foundation APIs via the VideoDecodeAccelerator interface. 35// This class lives on a single thread and DCHECKs that it is never accessed 36// from any other. 37class CONTENT_EXPORT DXVAVideoDecodeAccelerator 38 : public media::VideoDecodeAccelerator, 39 NON_EXPORTED_BASE(public base::NonThreadSafe) { 40 public: 41 enum State { 42 kUninitialized, // un-initialized. 43 kNormal, // normal playing state. 44 kResetting, // upon received Reset(), before ResetDone() 45 kStopped, // upon output EOS received. 46 kFlushing, // upon flush request received. 47 }; 48 49 // Does not take ownership of |client| which must outlive |*this|. 50 explicit DXVAVideoDecodeAccelerator( 51 const base::Callback<bool(void)>& make_context_current); 52 virtual ~DXVAVideoDecodeAccelerator(); 53 54 // media::VideoDecodeAccelerator implementation. 55 virtual bool Initialize(media::VideoCodecProfile profile, 56 Client* client) OVERRIDE; 57 virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) OVERRIDE; 58 virtual void AssignPictureBuffers( 59 const std::vector<media::PictureBuffer>& buffers) OVERRIDE; 60 virtual void ReusePictureBuffer(int32 picture_buffer_id) OVERRIDE; 61 virtual void Flush() OVERRIDE; 62 virtual void Reset() OVERRIDE; 63 virtual void Destroy() OVERRIDE; 64 virtual bool CanDecodeOnIOThread() OVERRIDE; 65 66 private: 67 typedef void* EGLConfig; 68 typedef void* EGLSurface; 69 // Creates and initializes an instance of the D3D device and the 70 // corresponding device manager. The device manager instance is eventually 71 // passed to the IMFTransform interface implemented by the h.264 decoder. 72 bool CreateD3DDevManager(); 73 74 // Creates, initializes and sets the media types for the h.264 decoder. 75 bool InitDecoder(media::VideoCodecProfile profile); 76 77 // Validates whether the h.264 decoder supports hardware video acceleration. 78 bool CheckDecoderDxvaSupport(); 79 80 // Returns information about the input and output streams. This includes 81 // alignment information, decoder support flags, minimum sample size, etc. 82 bool GetStreamsInfoAndBufferReqs(); 83 84 // Registers the input and output media types on the h.264 decoder. This 85 // includes the expected input and output formats. 86 bool SetDecoderMediaTypes(); 87 88 // Registers the input media type for the h.264 decoder. 89 bool SetDecoderInputMediaType(); 90 91 // Registers the output media type for the h.264 decoder. 92 bool SetDecoderOutputMediaType(const GUID& subtype); 93 94 // Passes a command message to the decoder. This includes commands like 95 // start of stream, end of stream, flush, drain the decoder, etc. 96 bool SendMFTMessage(MFT_MESSAGE_TYPE msg, int32 param); 97 98 // The bulk of the decoding happens here. This function handles errors, 99 // format changes and processes decoded output. 100 void DoDecode(); 101 102 // Invoked when we have a valid decoded output sample. Retrieves the D3D 103 // surface and maintains a copy of it which is passed eventually to the 104 // client when we have a picture buffer to copy the surface contents to. 105 bool ProcessOutputSample(IMFSample* sample); 106 107 // Processes pending output samples by copying them to available picture 108 // slots. 109 void ProcessPendingSamples(); 110 111 // Helper function to notify the accelerator client about the error. 112 void StopOnError(media::VideoDecodeAccelerator::Error error); 113 114 // Transitions the decoder to the uninitialized state. The decoder will stop 115 // accepting requests in this state. 116 void Invalidate(); 117 118 // Notifies the client that the input buffer identifed by input_buffer_id has 119 // been processed. 120 void NotifyInputBufferRead(int input_buffer_id); 121 122 // Notifies the client that the decoder was flushed. 123 void NotifyFlushDone(); 124 125 // Notifies the client that the decoder was reset. 126 void NotifyResetDone(); 127 128 // Requests picture buffers from the client. 129 void RequestPictureBuffers(int width, int height); 130 131 // Notifies the client about the availability of a picture. 132 void NotifyPictureReady(const media::Picture& picture); 133 134 // Sends pending input buffer processed acks to the client if we don't have 135 // output samples waiting to be processed. 136 void NotifyInputBuffersDropped(); 137 138 // Decodes pending input buffers. 139 void DecodePendingInputBuffers(); 140 141 // Helper for handling the Flush operation. 142 void FlushInternal(); 143 144 // Helper for handling the Decode operation. 145 void DecodeInternal(const base::win::ScopedComPtr<IMFSample>& input_sample); 146 147 // Handles mid stream resolution changes. 148 void HandleResolutionChanged(int width, int height); 149 150 struct DXVAPictureBuffer; 151 typedef std::map<int32, linked_ptr<DXVAPictureBuffer> > OutputBuffers; 152 153 // Tells the client to dismiss the stale picture buffers passed in. 154 void DismissStaleBuffers(const OutputBuffers& picture_buffers); 155 156 // To expose client callbacks from VideoDecodeAccelerator. 157 media::VideoDecodeAccelerator::Client* client_; 158 159 base::win::ScopedComPtr<IMFTransform> decoder_; 160 161 base::win::ScopedComPtr<IDirect3D9Ex> d3d9_; 162 base::win::ScopedComPtr<IDirect3DDevice9Ex> device_; 163 base::win::ScopedComPtr<IDirect3DDeviceManager9> device_manager_; 164 base::win::ScopedComPtr<IDirect3DQuery9> query_; 165 // Ideally the reset token would be a stack variable which is used while 166 // creating the device manager. However it seems that the device manager 167 // holds onto the token and attempts to access it if the underlying device 168 // changes. 169 // TODO(ananta): This needs to be verified. 170 uint32 dev_manager_reset_token_; 171 172 // The EGL config to use for decoded frames. 173 EGLConfig egl_config_; 174 175 // Current state of the decoder. 176 State state_; 177 178 MFT_INPUT_STREAM_INFO input_stream_info_; 179 MFT_OUTPUT_STREAM_INFO output_stream_info_; 180 181 // Contains information about a decoded sample. 182 struct PendingSampleInfo { 183 PendingSampleInfo(int32 buffer_id, IMFSample* sample); 184 ~PendingSampleInfo(); 185 186 int32 input_buffer_id; 187 base::win::ScopedComPtr<IMFSample> output_sample; 188 }; 189 190 typedef std::list<PendingSampleInfo> PendingOutputSamples; 191 192 // List of decoded output samples. 193 PendingOutputSamples pending_output_samples_; 194 195 // This map maintains the picture buffers passed the client for decoding. 196 // The key is the picture buffer id. 197 OutputBuffers output_picture_buffers_; 198 199 // Set to true if we requested picture slots from the client. 200 bool pictures_requested_; 201 202 // Counter which holds the number of input packets before a successful 203 // decode. 204 int inputs_before_decode_; 205 206 // List of input samples waiting to be processed. 207 typedef std::list<base::win::ScopedComPtr<IMFSample>> PendingInputs; 208 PendingInputs pending_input_buffers_; 209 210 // Callback to set the correct gl context. 211 base::Callback<bool(void)> make_context_current_; 212 213 // WeakPtrFactory for posting tasks back to |this|. 214 base::WeakPtrFactory<DXVAVideoDecodeAccelerator> weak_this_factory_; 215}; 216 217} // namespace content 218 219#endif // CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_ 220