| // Copyright 2016 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. |
| |
| module media.mojom; |
| |
| import "media/mojo/interfaces/audio_parameters.mojom"; |
| import "media/mojo/interfaces/media_types.mojom"; |
| |
| // An interface for controlling an audio output stream. |
| // On error, the message pipe is closed. |
| // To close the stream, just close the message pipe. |
| interface AudioOutputStream { |
| // Starts rendering audio. |
| Play(); |
| |
| // Stops rendering audio and sends a signal to the |socket_descriptor| |
| // indicating this. |
| Pause(); |
| |
| // Sets volume. Volume must be in the range [0, 1]. |
| SetVolume(double volume); |
| }; |
| |
| interface AudioOutputStreamProvider { |
| // Creates a new AudioOutputStream using |params|. |shared_buffer| and |
| // |socket_descriptor| are used to write data to the stream as defined |
| // in AudioDeviceThread. This means: |
| // * |shared_buffer| will be a writable handle to memory of the size needed |
| // by AudioDeviceThread for the specified params. |
| // * |socket_descriptor| is a descriptor from which a |
| // base::CancelableSyncSocket can be constructed. |
| // Can only be called once. |
| Acquire(AudioOutputStream& output_stream, AudioParameters params) |
| => (handle<shared_buffer> shared_buffer, handle socket_descriptor); |
| }; |