V4L2SVDA: Add a VP9Accelerator implementation utilizing the V4L2 VP9 frame API.

media/gpu/v4l2_slice_video_decode_accelerator.h

 // Copyright 2015 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_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 #define MEDIA_GPU_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <linux/videodev2.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <queue>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "media/gpu/gpu_video_decode_accelerator_helpers.h"
 #include "media/gpu/h264_decoder.h"
 #include "media/gpu/media_gpu_export.h"
 #include "media/gpu/v4l2_device.h"
 #include "media/gpu/vp8_decoder.h"
+#include "media/gpu/vp9_decoder.h"
 #include "media/video/video_decode_accelerator.h"
 
 namespace media {
 
 // An implementation of VideoDecodeAccelerator that utilizes the V4L2 slice
 // level codec API for decoding. The slice level API provides only a low-level
 // decoding functionality and requires userspace to provide support for parsing
 // the input stream and managing decoder state across frames.
 class MEDIA_GPU_EXPORT V4L2SliceVideoDecodeAccelerator
     : public VideoDecodeAccelerator {
@@ skipping 21 matching lines @@
   bool TryToSetupDecodeOnSeparateThread(
       const base::WeakPtr<Client>& decode_client,
       const scoped_refptr<base::SingleThreadTaskRunner>& decode_task_runner)
       override;
 
   static VideoDecodeAccelerator::SupportedProfiles GetSupportedProfiles();
 
  private:
   class V4L2H264Accelerator;
   class V4L2VP8Accelerator;
+  class V4L2VP9Accelerator;
 
   // Record for input buffers.
   struct InputRecord {
     InputRecord();
     int32_t input_id;
     void* address;
     size_t length;
     size_t bytes_used;
     bool at_device;
   };
@@ skipping 25 matching lines @@
   // Below methods are used by accelerator implementations.
   //
   // Append slice data in |data| of size |size| to pending hardware
   // input buffer with |index|. This buffer will be submitted for decode
   // on the next DecodeSurface(). Return true on success.
   bool SubmitSlice(int index, const uint8_t* data, size_t size);
 
   // Submit controls in |ext_ctrls| to hardware. Return true on success.
   bool SubmitExtControls(struct v4l2_ext_controls* ext_ctrls);
 
+  // Gets current control values for controls in |ext_ctrls| from the driver.
+  // Return true on success.
+  bool GetExtControls(struct v4l2_ext_controls* ext_ctrls);
+
+  // Return true if the driver exposes V4L2 control |ctrl_id|, false otherwise.
+  bool IsCtrlExposed(uint32_t ctrl_id);
+
   // Decode of |dec_surface| is ready to be submitted and all codec-specific
   // settings are set in hardware.
   void DecodeSurface(const scoped_refptr<V4L2DecodeSurface>& dec_surface);
 
   // |dec_surface| is ready to be outputted once decode is finished.
   // This can be called before decode is actually done in hardware, and this
   // method is responsible for maintaining the ordering, i.e. the surfaces will
   // be outputted in the same order as SurfaceReady calls. To do so, the
   // surfaces are put on decoder_display_queue_ and sent to output in that
   // order once all preceding surfaces are sent.
@@ skipping 293 matching lines @@
   // all previously-queued frames, so we can finish the flush/reset/surface
   // change flows. These can stack.
   bool decoder_flushing_;
   bool decoder_resetting_;
   bool surface_set_change_pending_;
 
   // Hardware accelerators.
   // TODO(posciak): Try to have a superclass here if possible.
   std::unique_ptr<V4L2H264Accelerator> h264_accelerator_;
   std::unique_ptr<V4L2VP8Accelerator> vp8_accelerator_;
+  std::unique_ptr<V4L2VP9Accelerator> vp9_accelerator_;
 
   // Codec-specific software decoder in use.
   std::unique_ptr<AcceleratedVideoDecoder> decoder_;
 
   // Surfaces queued to device to keep references to them while decoded.
   using V4L2DecodeSurfaceByOutputId =
       std::map<int, scoped_refptr<V4L2DecodeSurface>>;
   V4L2DecodeSurfaceByOutputId surfaces_at_device_;
 
   // Surfaces sent to client to keep references to them while displayed.
@@ skipping 18 matching lines @@
   MakeGLContextCurrentCallback make_context_current_cb_;
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<V4L2SliceVideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(V4L2SliceVideoDecodeAccelerator);
 };
 
 class V4L2H264Picture;
 class V4L2VP8Picture;
+class V4L2VP9Picture;
 
 }  // namespace media
 
 #endif  // MEDIA_GPU_V4L2_SLICE_VIDEO_DECODE_ACCELERATOR_H_