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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
#include "media/capture/mojom/video_capture_buffer.mojom.h"
#include "media/capture/mojom/video_capture_types.mojom.h"
#include "mojo/public/cpp/system/buffer.h"
namespace media {
class VideoFrame;
} // namespace media
namespace content {
typedef base::UnguessableToken VideoCaptureControllerID;
// Represents a buffer that is ready for consumption. Mirrors ReadyBuffer in
// video_capture_types.mojom.
struct ReadyBuffer {
ReadyBuffer(int buffer_id, media::mojom::VideoFrameInfoPtr frame_info);
ReadyBuffer(ReadyBuffer&& other);
~ReadyBuffer();
ReadyBuffer& operator=(ReadyBuffer&& other);
int buffer_id;
media::mojom::VideoFrameInfoPtr frame_info;
};
// VideoCaptureControllerEventHandler is the interface for
// VideoCaptureController to notify clients about the events such as
// BufferReady, FrameInfo, Error, etc.
// OnError and OnEnded need to be scheduled to the end of message queue to
// guarantee some other clearing jobs are done before they are handled.
// Other methods can be forwarded synchronously.
// TODO(mcasas): https://crbug.com/654176 merge back into VideoCaptureController
class VideoCaptureControllerEventHandler {
public:
virtual void OnCaptureConfigurationChanged(
const VideoCaptureControllerID& id) = 0;
// An Error has occurred in the VideoCaptureDevice.
virtual void OnError(const VideoCaptureControllerID& id,
media::VideoCaptureError error) = 0;
virtual void OnNewBuffer(const VideoCaptureControllerID& id,
media::mojom::VideoBufferHandlePtr buffer_handle,
int buffer_id) = 0;
// A previously created buffer has been freed and will no longer be used.
virtual void OnBufferDestroyed(const VideoCaptureControllerID& id,
int buffer_id) = 0;
// A buffer (and optionally scaled versions of it) has been filled with a
// captured VideoFrame.
virtual void OnBufferReady(const VideoCaptureControllerID& id,
const ReadyBuffer& buffer) = 0;
// A frame was dropped - OnBufferReady() was never called for this frame. In
// other words the frame was dropped before it reached the renderer process.
virtual void OnFrameDropped(const VideoCaptureControllerID& id,
media::VideoCaptureFrameDropReason reason) = 0;
// All subsequent buffers are guaranteed to have a sub-capture-target version
// whose value is at least |sub_capture_target_version|.
virtual void OnNewSubCaptureTargetVersion(
const VideoCaptureControllerID& id,
uint32_t sub_capture_target_version) = 0;
virtual void OnFrameWithEmptyRegionCapture(
const VideoCaptureControllerID& id) = 0;
// The capture session has ended and no more frames will be sent.
virtual void OnEnded(const VideoCaptureControllerID& id) = 0;
// VideoCaptureDevice has successfully started the device.
virtual void OnStarted(const VideoCaptureControllerID& id) = 0;
virtual void OnStartedUsingGpuDecode(const VideoCaptureControllerID& id) = 0;
protected:
virtual ~VideoCaptureControllerEventHandler() {}
};
} // namespace content
#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_CONTROLLER_EVENT_HANDLER_H_
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