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41 lines
1.7 KiB
Plaintext
41 lines
1.7 KiB
Plaintext
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// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module video_capture.mojom;
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import "media/capture/mojo/video_capture_types.mojom";
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import "services/video_capture/public/interfaces/device.mojom";
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enum DeviceAccessResultCode {
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NOT_INITIALIZED,
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SUCCESS,
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ERROR_DEVICE_NOT_FOUND
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};
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// Enables access to a set of video capture devices.
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// Typical operation is to first call GetDeviceInfos() to obtain
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// information about available devices. The |device_id| of the infos can
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// subsequently be used to create an instance of
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// video_capture.mojom.Device using CreateDevice().
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// The factory guarantees that no two device infos it returns use the
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// same |device_id|.
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interface DeviceFactory {
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GetDeviceInfos()
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=> (array<media.mojom.VideoCaptureDeviceInfo> device_infos);
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// Provides exclusive access to the device identified by |device_id|.
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// The access is valid until either the message pipe associated with
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// |device_request| is closed by the client, or a subsequent call to
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// CreateDevice() is made. When a subsequent call is made while the
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// |device_request| from a previous call has not yet been closed, the service
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// "revokes" that previous |device_request| (by closing the connection) and
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// the exclusive access goes to the new |device_request|.
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// Note: This design avoids the issue of it not being clear how soon after a
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// |device_request| has been (asynchronously) discarded a subsequent call to
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// CreateDevice() would succeed if it were to deny access while still
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// in use.
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CreateDevice(string device_id, Device& device_request)
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=> (DeviceAccessResultCode result_code);
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};
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