blob: f6916409536d5a86e459255f7afcf41122efb7e6 [file] [log] [blame]
* 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.
#include "webrtc/modules/audio_mixer/include/audio_mixer_defines.h"
#include "webrtc/modules/include/module.h"
#include "webrtc/modules/include/module_common_types.h"
namespace webrtc {
class OldAudioMixerOutputReceiver;
class MixerAudioSource;
class Trace;
class NewAudioConferenceMixer : public Module {
enum { kMaximumAmountOfMixedParticipants = 3 };
enum Frequency {
kNbInHz = 8000,
kWbInHz = 16000,
kSwbInHz = 32000,
kFbInHz = 48000,
kLowestPossible = -1,
kDefaultFrequency = kWbInHz
// Factory method. Constructor disabled.
static NewAudioConferenceMixer* Create(int id);
virtual ~NewAudioConferenceMixer() {}
// Module functions
int64_t TimeUntilNextProcess() override = 0;
void Process() override = 0;
// Register/unregister a callback class for receiving the mixed audio.
virtual int32_t RegisterMixedStreamCallback(
OldAudioMixerOutputReceiver* receiver) = 0;
virtual int32_t UnRegisterMixedStreamCallback() = 0;
// Add/remove participants as candidates for mixing.
virtual int32_t SetMixabilityStatus(MixerAudioSource* participant,
bool mixable) = 0;
// Returns true if a participant is a candidate for mixing.
virtual bool MixabilityStatus(const MixerAudioSource& participant) const = 0;
// Inform the mixer that the participant should always be mixed and not
// count toward the number of mixed participants. Note that a participant
// must have been added to the mixer (by calling SetMixabilityStatus())
// before this function can be successfully called.
virtual int32_t SetAnonymousMixabilityStatus(MixerAudioSource* participant,
bool mixable) = 0;
// Returns true if the participant is mixed anonymously.
virtual bool AnonymousMixabilityStatus(
const MixerAudioSource& participant) const = 0;
// Set the minimum sampling frequency at which to mix. The mixing algorithm
// may still choose to mix at a higher samling frequency to avoid
// downsampling of audio contributing to the mixed audio.
virtual int32_t SetMinimumMixingFrequency(Frequency freq) = 0;
NewAudioConferenceMixer() {}
} // namespace webrtc