57 lines
1.7 KiB
C++
57 lines
1.7 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MEDIA_BASE_AUDIO_SOURCE_H_
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#define MEDIA_BASE_AUDIO_SOURCE_H_
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#include <cstddef>
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#include <optional>
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namespace cricket {
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// Abstract interface for providing the audio data.
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// TODO(deadbeef): Rename this to AudioSourceInterface, and rename
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// webrtc::AudioSourceInterface to AudioTrackSourceInterface.
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class AudioSource {
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public:
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class Sink {
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public:
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// Callback to receive data from the AudioSource.
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virtual void OnData(
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const void* audio_data,
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int bits_per_sample,
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int sample_rate,
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size_t number_of_channels,
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size_t number_of_frames,
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std::optional<int64_t> absolute_capture_timestamp_ms) = 0;
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// Called when the AudioSource is going away.
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virtual void OnClose() = 0;
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// Returns the number of channels encoded by the sink. This can be less than
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// the number_of_channels if down-mixing occur. A value of -1 means an
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// unknown number.
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virtual int NumPreferredChannels() const = 0;
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protected:
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virtual ~Sink() {}
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};
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// Sets a sink to the AudioSource. There can be only one sink connected
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// to the source at a time.
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virtual void SetSink(Sink* sink) = 0;
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protected:
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virtual ~AudioSource() {}
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};
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} // namespace cricket
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#endif // MEDIA_BASE_AUDIO_SOURCE_H_
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