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49 lines
2.2 KiB
Plaintext
49 lines
2.2 KiB
Plaintext
// Copyright 2017 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 arc.mojom;
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import "arc_camera3.mojom";
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// The ARC++ camera HAL v3 Mojo dispatcher. The dispatcher acts as a proxy and
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// waits for the server and the clients to register. There can only be one
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// server registered, with multiple clients requesting connections to the
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// server. For each client, the dispatcher is responsible for creating a Mojo
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// channel to the server and pass the established Mojo channel to the client in
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// order to set up a Mojo channel between the client and the server.
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//
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// The CameraHalDispatcher is designed to help the server and the clients to
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// recover from errors easily. For example, when the camera HAL process crashes
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// the CameraHalDispatcher can still hold the connections of the clients. When
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// the camera HAL reconnects the CameraHalDispatcher can then quickly restore
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// the Mojo channels between the clients and the camera HAL process by calling
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// CameraHalClient::SetUpChannel() in RegiserServer().
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interface CameraHalDispatcher {
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// A CameraHalServer calls RegisterServer to register itself with the
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// dispatcher.
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RegisterServer@0(CameraHalServer server);
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// A CameraHalClient calls RegisterClient to register itself with the
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// dispatcher.
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RegisterClient@1(CameraHalClient client);
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};
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// The ARC++ camera HAL v3 Mojo server.
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interface CameraHalServer {
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// A caller calls CreateChannel to create a new Mojo channel to the camera
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// HAL v3 adapter. Upon successfully binding of |camera_module_request|, the
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// caller will have a established Mojo channel to the camera HAL v3 adapter
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// process.
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CreateChannel@0(CameraModule& camera_module_request);
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};
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// The ARC++ camera HAL v3 Mojo client.
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interface CameraHalClient {
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// A caller calls SetUpChannel to dispatch the established Mojo channel
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// |camera_module_ptr| to the client. The CameraHalClient can create a
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// Mojo channel to the camera HAL v3 adapter process with |camera_module_ptr|.
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// SetUpChannel may be called multiple times.
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SetUpChannel@0(CameraModule camera_module_ptr);
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};
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