a4c2106120
1. Use of const in all variable declarations where it is possible 2. Variable names and function arguments changed from CamelCase to match code style 3. A few stale comments removed. 4. Chromium clang plugin check added (now possible thanks to kwiberg@'s work on common.h) 5. Disallow constructor macros added. NOTRY=true Review-Url: https://codereview.webrtc.org/2294263002 Cr-Commit-Position: refs/heads/master@{#14120}
79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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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_MIXER_AUDIO_MIXER_H_
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#define WEBRTC_MODULES_AUDIO_MIXER_AUDIO_MIXER_H_
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#include <memory>
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#include "webrtc/modules/audio_mixer/audio_mixer_defines.h"
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#include "webrtc/modules/include/module.h"
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#include "webrtc/modules/include/module_common_types.h"
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namespace webrtc {
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class MixerAudioSource;
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class AudioMixer {
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public:
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static const int kMaximumAmountOfMixedAudioSources = 3;
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enum Frequency {
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kNbInHz = 8000,
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kWbInHz = 16000,
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kSwbInHz = 32000,
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kFbInHz = 48000,
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kDefaultFrequency = kWbInHz
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};
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// Factory method. Constructor disabled.
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static std::unique_ptr<AudioMixer> Create(int id);
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virtual ~AudioMixer() {}
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// Add/remove audio sources as candidates for mixing.
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virtual int32_t SetMixabilityStatus(MixerAudioSource* audio_source,
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bool mixable) = 0;
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// Returns true if an audio source is a candidate for mixing.
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virtual bool MixabilityStatus(const MixerAudioSource& audio_source) const = 0;
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// Inform the mixer that the audio source should always be mixed and not
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// count toward the number of mixed audio sources. Note that an audio source
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// must have been added to the mixer (by calling SetMixabilityStatus())
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// before this function can be successfully called.
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virtual int32_t SetAnonymousMixabilityStatus(MixerAudioSource* audio_source,
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bool mixable) = 0;
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// Performs mixing by asking registered audio sources for audio. The
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// mixed result is placed in the provided AudioFrame. Can only be
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// called from a single thread. The rate and channels arguments
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// specify the rate and number of channels of the mix result.
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virtual void Mix(int sample_rate,
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size_t number_of_channels,
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AudioFrame* audio_frame_for_mixing) = 0;
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// Returns true if the audio source is mixed anonymously.
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virtual bool AnonymousMixabilityStatus(
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const MixerAudioSource& audio_source) const = 0;
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// Output level functions for VoEVolumeControl. Return value
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// between 0 and 9 is returned by voe::AudioLevel.
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virtual int GetOutputAudioLevel() = 0;
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// Return value between 0 and 0x7fff is returned by voe::AudioLevel.
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virtual int GetOutputAudioLevelFullRange() = 0;
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protected:
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AudioMixer() {}
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private:
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RTC_DISALLOW_COPY_AND_ASSIGN(AudioMixer);
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_AUDIO_MIXER_AUDIO_MIXER_H_
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