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Unified Diff: content/browser/renderer_host/media/buildable_video_capture_device.h

Issue 2738763002: [Mojo Video Capture] Introduce abstraction BuildableVideoCaptureDevice (Closed)
Patch Set: Rebase to March 30 Created 3 years, 9 months ago
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Index: content/browser/renderer_host/media/buildable_video_capture_device.h
diff --git a/content/browser/renderer_host/media/buildable_video_capture_device.h b/content/browser/renderer_host/media/buildable_video_capture_device.h
new file mode 100644
index 0000000000000000000000000000000000000000..8a0eae4abc4d9144cd576a96a86de819320a8869
--- /dev/null
+++ b/content/browser/renderer_host/media/buildable_video_capture_device.h
@@ -0,0 +1,73 @@
+// Copyright 2017 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 CONTENT_BROWSER_RENDERER_HOST_MEDIA_BUILDABLE_VIDEO_CAPTURE_DEVICE_H_
+#define CONTENT_BROWSER_RENDERER_HOST_MEDIA_BUILDABLE_VIDEO_CAPTURE_DEVICE_H_
+
+#include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "content/public/common/media_stream_request.h"
+#include "media/capture/video/video_capture_device.h"
+#include "media/capture/video_capture_types.h"
+
+namespace content {
+
+class VideoCaptureController;
+
+// Abstraction for a video capture device that must be "built" before it can be
+// operated and must be "stopped", before it can be released. Typical operation
+// is that a newly created instance initially reports IsDeviceAlive() == false.
+// Clients call CreateAndStartDeviceAsync(), which kicks off the asynchronous
+// building of the device. The outcome of the device building is reported to an
+// instance of Callbacks. Once the device has been built successfully, the
+// "Device operation methods", are allowed to be called. ReleaseDeviceAsync()
+// must be called in order to release the device if it has before been built
+// successfully. After calling ReleaseDeviceAsync(), it is legal to call
+// CreateAndStartDeviceAsync() to rebuild and start the device again.
+class CONTENT_EXPORT BuildableVideoCaptureDevice {
+ public:
+ class CONTENT_EXPORT Callbacks {
+ public:
+ virtual ~Callbacks() {}
+ // Returns nullptr if no descriptor was found.
+ virtual const media::VideoCaptureDeviceDescriptor* LookupDeviceDescriptor(
+ const std::string& id) = 0;
+ virtual void WillStartDevice(media::VideoFacingMode facing_mode) = 0;
+ virtual void DidStartDevice(VideoCaptureController* controller) = 0;
+ virtual void OnDeviceStartFailed(VideoCaptureController* controller) = 0;
+ };
+
+ virtual ~BuildableVideoCaptureDevice() {}
+
+ // Device management methods.
+ virtual void CreateAndStartDeviceAsync(
+ VideoCaptureController* controller,
+ const media::VideoCaptureParams& params,
+ Callbacks* callbacks,
+ base::OnceClosure done_cb) = 0;
+ virtual void ReleaseDeviceAsync(VideoCaptureController* controller,
+ base::OnceClosure done_cb) = 0;
+ virtual bool IsDeviceAlive() const = 0;
+
+ // Device operation methods.
+ virtual void GetPhotoCapabilities(
+ media::VideoCaptureDevice::GetPhotoCapabilitiesCallback callback)
+ const = 0;
+ virtual void SetPhotoOptions(
+ media::mojom::PhotoSettingsPtr settings,
+ media::VideoCaptureDevice::SetPhotoOptionsCallback callback) = 0;
+ virtual void TakePhoto(
+ media::VideoCaptureDevice::TakePhotoCallback callback) = 0;
+ virtual void MaybeSuspendDevice() = 0;
+ virtual void ResumeDevice() = 0;
+ virtual void RequestRefreshFrame() = 0;
+
+ // Methods for specific types of devices.
+ virtual void SetDesktopCaptureWindowIdAsync(gfx::NativeViewId window_id,
+ base::OnceClosure done_cb) = 0;
+};
+
+} // namespace content
+
+#endif // CONTENT_BROWSER_RENDERER_HOST_MEDIA_BUILDABLE_VIDEO_CAPTURE_DEVICE_H_
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