87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
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/*
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* Copyright (c) 2011 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 WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_H_
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#define WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_H_
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#include "audio_conference_mixer_defines.h"
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#include "module.h"
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#include "module_common_types.h"
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namespace webrtc {
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class AudioMixerOutputReceiver;
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class AudioMixerStatusReceiver;
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class MixerParticipant;
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class Trace;
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class AudioConferenceMixer : public Module
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{
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public:
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enum {kMaximumAmountOfMixedParticipants = 16};
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enum Frequency
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{
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kNbInHz = 8000,
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kWbInHz = 16000,
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kSwbInHz = 32000,
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kLowestPossible = -1,
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kDefaultFrequency = kWbInHz
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};
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// Factory method. Constructor disabled.
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static AudioConferenceMixer* CreateAudioConferenceMixer(
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const WebRtc_Word32 id);
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virtual ~AudioConferenceMixer() {}
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// Returns version of the module and its components
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static WebRtc_Word32 GetVersion(WebRtc_Word8* version,
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WebRtc_UWord32& remainingBufferInBytes,
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WebRtc_UWord32& position);
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// Module functions
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virtual WebRtc_Word32 ChangeUniqueId(const WebRtc_Word32 id) = 0;
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virtual WebRtc_Word32 TimeUntilNextProcess() = 0 ;
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virtual WebRtc_Word32 Process() = 0;
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// Register/unregister a callback class for receiving the mixed audio.
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virtual WebRtc_Word32 RegisterMixedStreamCallback(
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AudioMixerOutputReceiver& receiver) = 0;
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virtual WebRtc_Word32 UnRegisterMixedStreamCallback() = 0;
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// Register/unregister a callback class for receiving status information.
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virtual WebRtc_Word32 RegisterMixerStatusCallback(
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AudioMixerStatusReceiver& mixerStatusCallback,
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const WebRtc_UWord32 amountOf10MsBetweenCallbacks) = 0;
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virtual WebRtc_Word32 UnRegisterMixerStatusCallback() = 0;
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// Add/remove participants as candidates for mixing.
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virtual WebRtc_Word32 SetMixabilityStatus(
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MixerParticipant& participant,
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const bool mixable) = 0;
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// mixable is set to true if a participant is a candidate for mixing.
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virtual WebRtc_Word32 MixabilityStatus(
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MixerParticipant& participant,
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bool& mixable) = 0;
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// amountOfMixableParticipants is set to the number of participants that are
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// eligible for mixing.
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virtual WebRtc_Word32 AmountOfMixables(
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WebRtc_UWord32& amountOfMixableParticipants) = 0;
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// Set the minimum sampling frequency at which to mix. The mixing algorithm
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// may still choose to mix at a higher samling frequency to avoid
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// downsampling of audio contributing to the mixed audio.
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virtual WebRtc_Word32 SetMinimumMixingFrequency(Frequency freq) = 0;
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protected:
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AudioConferenceMixer() {}
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_CONFERENCE_MIXER_INTERFACE_AUDIO_CONFERENCE_MIXER_H_
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