cef/libcef/browser/audio_loopback_stream_creat...

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// Copyright 2018 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 CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_
#define CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_
#include "base/callback.h"
#include "base/macros.h"
#include "content/browser/media/forwarding_audio_stream_factory.h"
#include "content/common/content_export.h"
#include "media/mojo/mojom/audio_data_pipe.mojom.h"
#include "media/mojo/mojom/audio_input_stream.mojom.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
namespace media {
class AudioParameters;
}
// This class handles creating a loopback stream that either captures audio from
// a WebContents or the system-wide loopback through the Audio Service.
// This class is operated on the UI thread.
// Based on InProcessAudioLoopbackStreamCreator which was deleted in
// https://crrev.com/a5af2468cf.
class CefAudioLoopbackStreamCreator final {
public:
CefAudioLoopbackStreamCreator();
~CefAudioLoopbackStreamCreator();
// The callback that is called when the requested stream is created.
using StreamCreatedCallback = base::RepeatingCallback<void(
mojo::PendingRemote<media::mojom::AudioInputStream> stream,
mojo::PendingReceiver<media::mojom::AudioInputStreamClient>
client_receiver,
media::mojom::ReadOnlyAudioDataPipePtr data_pipe)>;
// Creates a loopback stream that captures the audio from |loopback_source|,
// or the default system playback if |loopback_source| is null. Local output
// of the source/system audio is muted during capturing.
void CreateLoopbackStream(content::WebContents* loopback_source,
const media::AudioParameters& params,
uint32_t total_segments,
const StreamCreatedCallback& callback);
private:
content::ForwardingAudioStreamFactory factory_;
DISALLOW_COPY_AND_ASSIGN(CefAudioLoopbackStreamCreator);
};
#endif // CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_