Linux Video Capture: Add V4L2VideoCaptureDelegate{Single,Multi}Plane.

media/video/capture/linux/v4l2_capture_delegate_single_plane.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_VIDEO_CAPTURE_LINUX_V4L2_CAPTURE_DELEGATE_SINGLE_PLANE_H_
+#define MEDIA_VIDEO_CAPTURE_LINUX_V4L2_CAPTURE_DELEGATE_SINGLE_PLANE_H_
+
+#include "base/memory/ref_counted.h"
+#include "media/video/capture/linux/v4l2_capture_delegate.h"
+#include "media/video/capture/video_capture_device.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
+
+namespace media {
+
+// V4L2 specifics for SPLANE API.
+class V4L2CaptureDelegateSinglePlane final : public V4L2CaptureDelegate {
+ public:
+  V4L2CaptureDelegateSinglePlane(
+      const VideoCaptureDevice::Name& device_name,
+      const scoped_refptr<base::SingleThreadTaskRunner>& v4l2_task_runner,
+      int power_line_frequency)
+      : V4L2CaptureDelegate(device_name,
+                            v4l2_task_runner,
+                            power_line_frequency) {}
+
+ private:
+  // BufferTracker derivation to implement construction semantics for SPLANE.
+  class BufferTrackerSPlane final : public BufferTracker {
+   public:
+    bool Init(int fd, const v4l2_buffer& buffer) override;
+
+   private:
+    ~BufferTrackerSPlane() override {}
+  };
+
+  ~V4L2CaptureDelegateSinglePlane() override {}
+
+  // V4L2CaptureDelegate virtual methods implementation.
+  scoped_refptr<BufferTracker> CreateBufferTracker() const override;
+  bool FillV4L2Format(v4l2_format* format,
+                      uint32_t width,
+                      uint32_t height,
+                      uint32_t pixelformat_fourcc) const override;
+  void FinishFillingV4L2Buffer(v4l2_buffer* buffer) const override;
+  void SendBuffer(const scoped_refptr<BufferTracker>& buffer_tracker,
+                  const v4l2_format& format) const override;
+};
+
+}  // namespace media
+
+#endif  // MEDIA_VIDEO_CAPTURE_LINUX_V4L2_CAPTURE_DELEGATE_MULTI_PLANE_H_