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