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101 lines
5.1 KiB
Plaintext
101 lines
5.1 KiB
Plaintext
// Copyright 2018 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 audio.mojom;
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import "media/mojo/interfaces/audio_data_pipe.mojom";
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import "media/mojo/interfaces/audio_input_stream.mojom";
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import "media/mojo/interfaces/audio_logging.mojom";
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import "media/mojo/interfaces/audio_output_stream.mojom";
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import "media/mojo/interfaces/audio_parameters.mojom";
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import "mojo/public/mojom/base/unguessable_token.mojom";
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// Mutes a group of AudioOutputStreams while at least one binding to an instance
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// exists. Once the last binding is dropped, all streams in the group are
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// un-muted.
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interface LocalMuter {};
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// This interface is exposed by the audio service to allow trusted clients
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// (like the browser process) to create streams. Note that while the factory
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// interface itself is only for trusted clients, the created streams and data
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// pipes may be forwarded to untrusted clients.
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//
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// The client must keep the connection to the factory while streams are
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// running.
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// TODO(https://crbug.com/803102): Add other stream creation functionality to
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// this interface.
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interface StreamFactory {
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// Creates an AudioInputStream and returns the AudioDataPipe it writes data to
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// and a bool indicating whether the stream is initially muted. |data_pipe| is
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// null, |initially_muted| is false and |stream_id| is empty in case stream
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// creation failed.
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// |device_id| is either the |unique_id| field from an AudioDeviceDescription
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// obtained from the audio.mojom.SystemInfo interface, or "default".
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// |shared_memory_count| indicates how many buffer segments can the input
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// stream client read at once, to avoid data overwriting. |enable_agc| is used
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// for enabling automatic gain control. |key_press_count_buffer| is an
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// optional readonly shared memory handle for reading the current key press
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// count, updated by browser process in media::UserInputMonitor
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// implementation.
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CreateInputStream(
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media.mojom.AudioInputStream& stream,
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media.mojom.AudioInputStreamClient client,
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media.mojom.AudioInputStreamObserver? observer,
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media.mojom.AudioLog? log,
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string device_id, media.mojom.AudioParameters params,
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uint32 shared_memory_count, bool enable_agc,
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handle<shared_buffer>? key_press_count_buffer)
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=> (media.mojom.AudioDataPipe? data_pipe, bool initially_muted,
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mojo_base.mojom.UnguessableToken? stream_id);
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// Associates an output device with an input stream, so that the input knows
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// which output device to cancel echo from. |input_stream_id| is the id
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// returned when the stream was created. |output_device_id| is a raw device
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// id. In case either of the parameters are invalid, the operation will
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// silently fail.
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AssociateInputAndOutputForAec(
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mojo_base.mojom.UnguessableToken input_stream_id,
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string output_device_id);
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// Creates an AudioOutputStream and returns the AudioDataPipe it reads data
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// from. |data_pipe| is null in case stream creation failed. |device_id| is
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// either the |unique_id| field from an AudioDeviceDescription obtained from
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// the audio.mojom.SystemInfo interface, or "default". The stream |group_id|
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// will later be used for muting streams or capturing them for loopback.
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CreateOutputStream(
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media.mojom.AudioOutputStream& stream,
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associated media.mojom.AudioOutputStreamObserver observer,
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media.mojom.AudioLog log,
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string device_id, media.mojom.AudioParameters params,
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mojo_base.mojom.UnguessableToken group_id)
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=> (media.mojom.AudioDataPipe? data_pipe);
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// Binds the request to the LocalMuter associated with the given |group_id|.
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// While one or more bindings to a group's LocalMuter exists, all local audio
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// playout for the streams in that group is muted.
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//
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// It is the responsibility of the client to bind to a muter before creating
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// any output streams that should be started muted. Likewise, if existing
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// output streams must remain muted until they are shut down, the binding to
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// the muter must not be closed until after all other streams' binding. (This
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// is the reason for the associated request argument.)
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BindMuter(associated LocalMuter& request,
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mojo_base.mojom.UnguessableToken group_id);
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// Creates an AudioInputStream that provides the result of looping-back and
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// mixing-together all current and future AudioOutputStreams tagged with the
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// given |group_id|. The loopback re-mixes audio, if necessary, so that the
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// resulting data stream format matches the specified |params|. All other args
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// and the result are as described in CreateInputStream() above, except for
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// |stream_id|. Loopback streams have no ID, since they cannot be used in
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// echo cancellation.
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CreateLoopbackStream(media.mojom.AudioInputStream& stream,
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media.mojom.AudioInputStreamClient client,
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media.mojom.AudioInputStreamObserver observer,
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media.mojom.AudioParameters params,
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uint32 shared_memory_count,
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mojo_base.mojom.UnguessableToken group_id)
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=> (media.mojom.AudioDataPipe? data_pipe);
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};
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