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/threading/non_thread_safe.h" 18 #include "base/win/scoped_comptr.h" 19 #include "content/common/content_export.h" 20 #include "content/common/gpu/media/video_decode_accelerator_impl.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 VideoDecodeAcceleratorImpl, 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 media::VideoDecodeAccelerator::Client* client, 47 const base::Callback<bool(void)>& make_context_current); 48 virtual ~DXVAVideoDecodeAccelerator(); 49 50 // media::VideoDecodeAccelerator implementation. 51 virtual bool Initialize(media::VideoCodecProfile profile) 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 60 private: 61 typedef void* EGLConfig; 62 typedef void* EGLSurface; 63 // Creates and initializes an instance of the D3D device and the 64 // corresponding device manager. The device manager instance is eventually 65 // passed to the IMFTransform interface implemented by the h.264 decoder. 66 bool CreateD3DDevManager(); 67 68 // Creates, initializes and sets the media types for the h.264 decoder. 69 bool InitDecoder(media::VideoCodecProfile profile); 70 71 // Validates whether the h.264 decoder supports hardware video acceleration. 72 bool CheckDecoderDxvaSupport(); 73 74 // Returns information about the input and output streams. This includes 75 // alignment information, decoder support flags, minimum sample size, etc. 76 bool GetStreamsInfoAndBufferReqs(); 77 78 // Registers the input and output media types on the h.264 decoder. This 79 // includes the expected input and output formats. 80 bool SetDecoderMediaTypes(); 81 82 // Registers the input media type for the h.264 decoder. 83 bool SetDecoderInputMediaType(); 84 85 // Registers the output media type for the h.264 decoder. 86 bool SetDecoderOutputMediaType(const GUID& subtype); 87 88 // Passes a command message to the decoder. This includes commands like 89 // start of stream, end of stream, flush, drain the decoder, etc. 90 bool SendMFTMessage(MFT_MESSAGE_TYPE msg, int32 param); 91 92 // The bulk of the decoding happens here. This function handles errors, 93 // format changes and processes decoded output. 94 void DoDecode(); 95 96 // Invoked when we have a valid decoded output sample. Retrieves the D3D 97 // surface and maintains a copy of it which is passed eventually to the 98 // client when we have a picture buffer to copy the surface contents to. 99 bool ProcessOutputSample(IMFSample* sample); 100 101 // Processes pending output samples by copying them to available picture 102 // slots. 103 void ProcessPendingSamples(); 104 105 // Helper function to notify the accelerator client about the error. 106 void StopOnError(media::VideoDecodeAccelerator::Error error); 107 108 // Transitions the decoder to the uninitialized state. The decoder will stop 109 // accepting requests in this state. 110 void Invalidate(); 111 112 // Notifies the client that the input buffer identifed by input_buffer_id has 113 // been processed. 114 void NotifyInputBufferRead(int input_buffer_id); 115 116 // Notifies the client that initialize was completed. 117 void NotifyInitializeDone(); 118 119 // Notifies the client that the decoder was flushed. 120 void NotifyFlushDone(); 121 122 // Notifies the client that the decoder was reset. 123 void NotifyResetDone(); 124 125 // Requests picture buffers from the client. 126 void RequestPictureBuffers(int width, int height); 127 128 // Notifies the client about the availability of a picture. 129 void NotifyPictureReady(const media::Picture& picture); 130 131 // Sends pending input buffer processed acks to the client if we don't have 132 // output samples waiting to be processed. 133 void NotifyInputBuffersDropped(); 134 135 // Decodes pending input buffers. 136 void DecodePendingInputBuffers(); 137 138 // Helper for handling the Flush operation. 139 void FlushInternal(); 140 141 // Helper for handling the Decode operation. 142 void DecodeInternal(const base::win::ScopedComPtr<IMFSample>& input_sample); 143 144 // Handles mid stream resolution changes. 145 void HandleResolutionChanged(int width, int height); 146 147 struct DXVAPictureBuffer; 148 typedef std::map<int32, linked_ptr<DXVAPictureBuffer> > OutputBuffers; 149 150 // Tells the client to dismiss the stale picture buffers passed in. 151 void DismissStaleBuffers(const OutputBuffers& picture_buffers); 152 153 // To expose client callbacks from VideoDecodeAccelerator. 154 media::VideoDecodeAccelerator::Client* client_; 155 156 base::win::ScopedComPtr<IMFTransform> decoder_; 157 158 base::win::ScopedComPtr<IDirect3D9Ex> d3d9_; 159 base::win::ScopedComPtr<IDirect3DDevice9Ex> device_; 160 base::win::ScopedComPtr<IDirect3DDeviceManager9> device_manager_; 161 base::win::ScopedComPtr<IDirect3DQuery9> query_; 162 // Ideally the reset token would be a stack variable which is used while 163 // creating the device manager. However it seems that the device manager 164 // holds onto the token and attempts to access it if the underlying device 165 // changes. 166 // TODO(ananta): This needs to be verified. 167 uint32 dev_manager_reset_token_; 168 169 // The EGL config to use for decoded frames. 170 EGLConfig egl_config_; 171 172 // Current state of the decoder. 173 State state_; 174 175 MFT_INPUT_STREAM_INFO input_stream_info_; 176 MFT_OUTPUT_STREAM_INFO output_stream_info_; 177 178 // Contains information about a decoded sample. 179 struct PendingSampleInfo { 180 PendingSampleInfo(int32 buffer_id, IMFSample* sample); 181 ~PendingSampleInfo(); 182 183 int32 input_buffer_id; 184 base::win::ScopedComPtr<IMFSample> output_sample; 185 }; 186 187 typedef std::list<PendingSampleInfo> PendingOutputSamples; 188 189 // List of decoded output samples. 190 PendingOutputSamples pending_output_samples_; 191 192 // This map maintains the picture buffers passed the client for decoding. 193 // The key is the picture buffer id. 194 OutputBuffers output_picture_buffers_; 195 196 // Set to true if we requested picture slots from the client. 197 bool pictures_requested_; 198 199 // Counter which holds the number of input packets before a successful 200 // decode. 201 int inputs_before_decode_; 202 203 // List of input samples waiting to be processed. 204 typedef std::list<base::win::ScopedComPtr<IMFSample>> PendingInputs; 205 PendingInputs pending_input_buffers_; 206 207 // Callback to set the correct gl context. 208 base::Callback<bool(void)> make_context_current_; 209 }; 210 211 } // namespace content 212 213 #endif // CONTENT_COMMON_GPU_MEDIA_DXVA_VIDEO_DECODE_ACCELERATOR_H_ 214
