Add accelerated video decoder interface, VP8 and H.264 implementations and hook up to V4L2SVDA.

content/common/gpu/media/v4l2_video_decode_accelerator.h

 // Copyright 2014 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.
 //
 // This file contains an implementation of VideoDecodeAccelerator
 // that utilizes hardware video decoders, which expose Video4Linux 2 API
 // (http://linuxtv.org/downloads/v4l-dvb-apis/).
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_
 
 #include <queue>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/media/v4l2_video_device.h"
 #include "media/base/limits.h"
 #include "media/base/video_decoder_config.h"
 #include "media/video/picture.h"
 #include "media/video/video_decode_accelerator.h"
 #include "ui/gfx/geometry/size.h"
@@ skipping 46 matching lines @@
 // subtle races (esp. if we get Reset() in the meantime), we block the decoder
 // thread while we wait for AssignPictureBuffers from the client.
 class CONTENT_EXPORT V4L2VideoDecodeAccelerator
     : public media::VideoDecodeAccelerator {
  public:
   V4L2VideoDecodeAccelerator(
       EGLDisplay egl_display,
       EGLContext egl_context,
       const base::WeakPtr<Client>& io_client_,
       const base::Callback<bool(void)>& make_context_current,
-      scoped_ptr<V4L2Device> device,
+      scoped_refptr<V4L2Device> device,

[scherkus (not reviewing), 2015/01/13 01:25:00]

const ref

[Pawel Osciak, 2015/01/13 11:33:35]

Done.

       const scoped_refptr<base::MessageLoopProxy>& io_message_loop_proxy);
   virtual ~V4L2VideoDecodeAccelerator();
 
   // media::VideoDecodeAccelerator implementation.
   // Note: Initialize() and Destroy() are synchronous.
   virtual bool Initialize(media::VideoCodecProfile profile,
                           Client* client) override;
   virtual void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   virtual void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) override;
@@ skipping 160 matching lines @@
   // The device task.
   void DevicePollTask(bool poll_device);
 
   //
   // Safe from any thread.
   //
 
   // Error notification (using PostTask() to child thread, if necessary).
   void NotifyError(Error error);
 
-  // Set the decoder_thread_ state (using PostTask to decoder thread, if
-  // necessary).
-  void SetDecoderState(State state);
+  // Set the decoder_state_ to kError and notify the client (if necessary).
+  void SetErrorState(Error error);
 
   //
   // Other utility functions.  Called on decoder_thread_, unless
   // decoder_thread_ is not yet started, in which case the child thread can call
   // these (e.g. in Initialize() or Destroy()).
   //
 
   // Create the buffers we need.
   bool CreateInputBuffers();
   bool CreateOutputBuffers();
@@ skipping 57 matching lines @@
   //
 
   // This thread services tasks posted from the VDA API entry points by the
   // child thread and device service callbacks posted from the device thread.
   base::Thread decoder_thread_;
   // Decoder state machine state.
   State decoder_state_;
   // BitstreamBuffer we're presently reading.
   scoped_ptr<BitstreamBufferRef> decoder_current_bitstream_buffer_;
   // The V4L2Device this class is operating upon.
-  scoped_ptr<V4L2Device> device_;
+  scoped_refptr<V4L2Device> device_;
   // FlushTask() and ResetTask() should not affect buffers that have been
   // queued afterwards.  For flushing or resetting the pipeline then, we will
   // delay these buffers until after the flush or reset completes.
   int decoder_delay_bitstream_buffer_id_;
   // Input buffer we're presently filling.
   int decoder_current_input_buffer_;
   // We track the number of buffer decode tasks we have scheduled, since each
   // task execution should complete one buffer.  If we fall behind (due to
   // resource backpressure, etc.), we'll have to schedule more to catch up.
   int decoder_decode_buffer_tasks_scheduled_;
@@ skipping 88 matching lines @@
 
   // The WeakPtrFactory for |weak_this_|.
   base::WeakPtrFactory<V4L2VideoDecodeAccelerator> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(V4L2VideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_V4L2_VIDEO_DECODE_ACCELERATOR_H_