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