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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 "map_wrapper.h"
#include "module_common_types.h"
#include "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 WebRtc_Word32 GetAudioFrame(const WebRtc_Word32 id,
AudioFrame& audioFrame) = 0;
// mixed will be set to true if the participant was mixed this mix iteration
WebRtc_Word32 IsMixed(bool& mixed) const;
// This function specifies the sampling frequency needed for the AudioFrame
// for future GetAudioFrame(..) calls.
virtual WebRtc_Word32 NeededFrequency(const WebRtc_Word32 id) = 0;
MixHistory* _mixHistory;
protected:
MixerParticipant();
virtual ~MixerParticipant();
};
// Container struct for participant statistics.
struct ParticipantStatistics
{
WebRtc_Word32 participant;
WebRtc_Word32 level;
};
class AudioMixerStatusReceiver
{
public:
// Callback function that provides an array of ParticipantStatistics for the
// participants that were mixed last mix iteration.
virtual void MixedParticipants(
const WebRtc_Word32 id,
const ParticipantStatistics* participantStatistics,
const WebRtc_UWord32 size) = 0;
// Callback function that provides an array of the ParticipantStatistics for
// the participants that had a positiv VAD last mix iteration.
virtual void VADPositiveParticipants(
const WebRtc_Word32 id,
const ParticipantStatistics* participantStatistics,
const WebRtc_UWord32 size) = 0;
// Callback function that provides the audio level of the mixed audio frame
// from the last mix iteration.
virtual void MixedAudioLevel(
const WebRtc_Word32 id,
const WebRtc_UWord32 level) = 0;
protected:
AudioMixerStatusReceiver() {}
virtual ~AudioMixerStatusReceiver() {}
};
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 WebRtc_Word32 id,
const AudioFrame& generalAudioFrame,
const AudioFrame** uniqueAudioFrames,
const WebRtc_UWord32 size) = 0;
protected:
AudioMixerOutputReceiver() {}
virtual ~AudioMixerOutputReceiver() {}
};
class AudioRelayReceiver
{
public:
// This callback function provides the mix decision for this mix iteration.
// mixerList is a list of elements of the type
// [int,MixerParticipant*]
virtual void NewAudioToRelay(const WebRtc_Word32 id,
const MapWrapper& mixerList) = 0;
protected:
AudioRelayReceiver() {}
virtual ~AudioRelayReceiver() {}
};
} // namespace webrtc
#endif // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_DEFINES_H_
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