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/*
* Copyright (c) 2011 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 WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
#define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
#include "webrtc/modules/interface/module_common_types.h"
#include "webrtc/typedefs.h"
namespace webrtc {
class MixHistory;
// A callback class that all mixer participants must inherit from/implement.
class MixerParticipant
{
public:
// The implementation of this function should update audioFrame with new
// audio every time it's called.
//
// If it returns -1, the frame will not be added to the mix.
virtual int32_t GetAudioFrame(int32_t id,
AudioFrame* audioFrame) = 0;
// Returns true if the participant was mixed this mix iteration.
bool IsMixed() const;
// This function specifies the sampling frequency needed for the AudioFrame
// for future GetAudioFrame(..) calls.
virtual int32_t NeededFrequency(int32_t id) const = 0;
MixHistory* _mixHistory;
protected:
MixerParticipant();
virtual ~MixerParticipant();
};
class AudioMixerOutputReceiver
{
public:
// This callback function provides the mixed audio for this mix iteration.
// Note that uniqueAudioFrames is an array of AudioFrame pointers with the
// size according to the size parameter.
virtual void NewMixedAudio(const int32_t id,
const AudioFrame& generalAudioFrame,
const AudioFrame** uniqueAudioFrames,
const uint32_t size) = 0;
protected:
AudioMixerOutputReceiver() {}
virtual ~AudioMixerOutputReceiver() {}
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
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