cef/libcef/browser/audio_mirror_destination.h

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// Copyright (c) 2018 The Chromium Embedded Framework Authors.
// Portions copyright (c) 2011 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_MIRROR_DESTINATION_H_
#define CEF_LIBCEF_BROWSER_AUDIO_MIRROR_DESTINATION_H_
#pragma once
#include "include/cef_audio_handler.h"
#include "include/cef_base.h"
#include "libcef/browser/browser_host_impl.h"
#include "base/callback.h"
#include "base/threading/thread_checker.h"
#include "content/browser/media/capture/audio_mirroring_manager.h"
#include "media/audio/audio_io.h"
#include "media/base/audio_converter.h"
#include "media/base/audio_parameters.h"
class CefAudioPushSink;
class CefBrowserHostImpl;
class CefAudioMirrorDestination
: public content::AudioMirroringManager::MirroringDestination {
public:
CefAudioMirrorDestination(CefRefPtr<CefBrowserHostImpl> browser,
CefRefPtr<CefAudioHandler> cef_audio_handler,
content::AudioMirroringManager* mirroring_manager);
virtual ~CefAudioMirrorDestination() = default;
// Start mirroring. This needs to be triggered on the IO thread.
void Start();
// Stop mirroring. This needs to be triggered on the IO thread.
void Stop();
// Asynchronously query whether this MirroringDestination wants to consume
// audio sourced from each of the |candidates|. |results_callback| is run
// to indicate which of them (or none) should have audio routed to this
// MirroringDestination. The second parameter of |results_callback|
// indicates whether the MirroringDestination wants either: 1) exclusive
// access to a diverted audio flow versus 2) a duplicate copy of the audio
// flow. |results_callback| must be run on the same thread as the one that
// called QueryForMatches().
void QueryForMatches(
const std::set<content::GlobalFrameRoutingId>& candidates,
MatchesCallback results_callback) override;
// Create a consumer of audio data in the format specified by |params|, and
// connect it as an input to mirroring. This is used to provide
// MirroringDestination with exclusive access to pull the audio flow from
// the source. When Close() is called on the returned AudioOutputStream, the
// input is disconnected and the object becomes invalid.
media::AudioOutputStream* AddInput(
const media::AudioParameters& params) override;
// Create a consumer of audio data in the format specified by |params|, and
// connect it as an input to mirroring. This is used to provide
// MirroringDestination with duplicate audio data, which is pushed from the
// main audio flow. When Close() is called on the returned AudioPushSink,
// the input is disconnected and the object becomes invalid.
media::AudioPushSink* AddPushInput(
const media::AudioParameters& params) override;
private:
void QueryForMatchesOnUIThread(
const std::set<content::GlobalFrameRoutingId>& candidates,
MatchesCallback results_callback);
void ReleasePushInput(CefAudioPushSink* sink);
CefRefPtr<CefBrowserHostImpl> browser_;
CefRefPtr<CefAudioHandler> cef_audio_handler_;
content::AudioMirroringManager* mirroring_manager_;
base::ThreadChecker thread_checker_;
};
#endif // CEF_LIBCEF_BROWSER_AUDIO_MIRROR_DESTINATION_H_