1 // Copyright 2018 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_ 6 #define CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_ 7 8 #include "base/callback.h" 9 #include "content/browser/media/forwarding_audio_stream_factory.h" 10 #include "content/common/content_export.h" 11 #include "media/mojo/mojom/audio_data_pipe.mojom.h" 12 #include "media/mojo/mojom/audio_input_stream.mojom.h" 13 #include "mojo/public/cpp/bindings/pending_remote.h" 14 15 namespace media { 16 class AudioParameters; 17 } 18 19 // This class handles creating a loopback stream that either captures audio from 20 // a WebContents or the system-wide loopback through the Audio Service. 21 // This class is operated on the UI thread. 22 // Based on InProcessAudioLoopbackStreamCreator which was deleted in 23 // https://crrev.com/a5af2468cf. 24 class CefAudioLoopbackStreamCreator final { 25 public: 26 CefAudioLoopbackStreamCreator(); 27 28 CefAudioLoopbackStreamCreator(const CefAudioLoopbackStreamCreator&) = delete; 29 CefAudioLoopbackStreamCreator& operator=( 30 const CefAudioLoopbackStreamCreator&) = delete; 31 32 ~CefAudioLoopbackStreamCreator(); 33 34 // The callback that is called when the requested stream is created. 35 using StreamCreatedCallback = base::RepeatingCallback<void( 36 mojo::PendingRemote<media::mojom::AudioInputStream> stream, 37 mojo::PendingReceiver<media::mojom::AudioInputStreamClient> 38 client_receiver, 39 media::mojom::ReadOnlyAudioDataPipePtr data_pipe)>; 40 41 // Creates a loopback stream that captures the audio from |loopback_source|, 42 // or the default system playback if |loopback_source| is null. Local output 43 // of the source/system audio is muted during capturing. 44 void CreateLoopbackStream(content::WebContents* loopback_source, 45 const media::AudioParameters& params, 46 uint32_t total_segments, 47 const StreamCreatedCallback& callback); 48 49 private: 50 content::ForwardingAudioStreamFactory factory_; 51 }; 52 53 #endif // CEF_LIBCEF_BROWSER_AUDIO_LOOPBACK_STREAM_CREATOR_H_ 54