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- // 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.
- #ifndef MEDIA_AUDIO_AUDIO_OUTPUT_DELEGATE_H_
- #define MEDIA_AUDIO_AUDIO_OUTPUT_DELEGATE_H_
- #include <memory>
- #include "base/memory/ref_counted.h"
- #include "media/base/media_export.h"
- namespace base {
- class UnsafeSharedMemoryRegion;
- class CancelableSyncSocket;
- }
- namespace media {
- class MEDIA_EXPORT AudioOutputDelegate {
- public:
- // An AudioOutputDelegate must not call back to its EventHandler in its
- // constructor.
- class MEDIA_EXPORT EventHandler {
- public:
- virtual ~EventHandler() = 0;
- // Called when the underlying stream is ready for playout.
- virtual void OnStreamCreated(
- int stream_id,
- base::UnsafeSharedMemoryRegion shared_memory_region,
- std::unique_ptr<base::CancelableSyncSocket> socket) = 0;
- // Called if stream encounters an error and has become unusable.
- virtual void OnStreamError(int stream_id) = 0;
- };
- virtual ~AudioOutputDelegate() = 0;
- virtual int GetStreamId() = 0;
- // Stream control:
- virtual void OnPlayStream() = 0;
- virtual void OnPauseStream() = 0;
- virtual void OnFlushStream() = 0;
- virtual void OnSetVolume(double volume) = 0;
- };
- } // namespace media
- #endif // MEDIA_AUDIO_AUDIO_OUTPUT_DELEGATE_H_
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