mirror of
https://github.com/Palakis/obs-websocket.git
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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/*
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obs-websocket
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Copyright (C) 2016-2021 Stephane Lepin <stephane.lepin@gmail.com>
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Copyright (C) 2020-2021 Kyle Manning <tt2468@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <https://www.gnu.org/licenses/>
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*/
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#pragma once
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#include <string>
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#include <atomic>
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#include <mutex>
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#include <condition_variable>
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#include <memory>
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#include <thread>
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#include <obs.hpp>
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#include "Obs.h"
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#include "Json.h"
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namespace Utils {
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namespace Obs {
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namespace VolumeMeter {
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// Some code copied from https://github.com/obsproject/obs-studio/blob/master/libobs/obs-audio-controls.c
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// Keeps a running tally of the current audio levels, for a specific input
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class Meter {
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public:
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Meter(obs_source_t *input);
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~Meter();
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bool InputValid();
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obs_weak_source_t *GetWeakInput() { return _input; }
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json GetMeterData();
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std::atomic<enum obs_peak_meter_type> PeakMeterType;
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private:
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OBSWeakSourceAutoRelease _input;
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// All values in mul
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std::mutex _mutex;
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bool _muted;
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int _channels;
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float _magnitude[MAX_AUDIO_CHANNELS];
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float _peak[MAX_AUDIO_CHANNELS];
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float _previousSamples[MAX_AUDIO_CHANNELS][4];
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std::atomic<uint64_t> _lastUpdate;
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std::atomic<float> _volume;
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void ResetAudioLevels();
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void ProcessAudioChannels(const struct audio_data *data);
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void ProcessPeak(const struct audio_data *data);
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void ProcessMagnitude(const struct audio_data *data);
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static void InputAudioCaptureCallback(void *priv_data, obs_source_t *source, const struct audio_data *data, bool muted);
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static void InputVolumeCallback(void *priv_data, calldata_t *cd);
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};
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// Maintains an array of active inputs
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class Handler {
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typedef std::function<void(std::vector<json>)> UpdateCallback;
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typedef std::unique_ptr<Meter> MeterPtr;
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public:
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Handler(UpdateCallback cb, uint64_t updatePeriod = 50);
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~Handler();
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private:
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UpdateCallback _updateCallback;
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std::mutex _meterMutex;
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std::vector<MeterPtr> _meters;
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uint64_t _updatePeriod;
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std::mutex _mutex;
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std::condition_variable _cond;
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std::atomic<bool> _running;
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std::thread _updateThread;
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void UpdateThread();
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static void InputActivateCallback(void *priv_data, calldata_t *cd);
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static void InputDeactivateCallback(void *priv_data, calldata_t *cd);
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};
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}
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}
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}
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