mirror of https://github.com/polybar/polybar.git
89 lines
1.7 KiB
C++
89 lines
1.7 KiB
C++
#pragma once
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#include <stdio.h>
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#include <functional>
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#include <string>
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#include <cmath>
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#include <alsa/asoundlib.h>
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#include "common.hpp"
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#include "config.hpp"
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#include "utils/concurrency.hpp"
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#define MAX_LINEAR_DB_SCALE 24
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POLYBAR_NS
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DEFINE_ERROR(alsa_exception);
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DEFINE_CHILD_ERROR(alsa_ctl_interface_error, alsa_exception);
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DEFINE_CHILD_ERROR(alsa_mixer_error, alsa_exception);
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// class definition : alsa_ctl_interface {{{
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template <typename T>
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void throw_exception(string&& message, int error_code) {
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const char* snd_error = snd_strerror(error_code);
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if (snd_error != nullptr)
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message += ": " + string{snd_error};
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throw T(message.c_str());
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}
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class alsa_ctl_interface {
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public:
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explicit alsa_ctl_interface(int numid);
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~alsa_ctl_interface();
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int get_numid();
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bool wait(int timeout = -1);
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bool test_device_plugged();
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void process_events();
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private:
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int m_numid = 0;
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concurrency_util::spin_lock m_lock;
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snd_hctl_t* m_hctl = nullptr;
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snd_hctl_elem_t* m_elem = nullptr;
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snd_ctl_t* m_ctl = nullptr;
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snd_ctl_elem_info_t* m_info = nullptr;
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snd_ctl_elem_value_t* m_value = nullptr;
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snd_ctl_elem_id_t* m_id = nullptr;
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};
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// }}}
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// class definition : alsa_mixer {{{
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class alsa_mixer {
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public:
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explicit alsa_mixer(string mixer_control_name);
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~alsa_mixer();
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string get_name();
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bool wait(int timeout = -1);
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int process_events();
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int get_volume();
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int get_normalized_volume();
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void set_volume(float percentage);
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void set_normalized_volume(float percentage);
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void set_mute(bool mode);
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void toggle_mute();
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bool is_muted();
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private:
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string m_name;
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concurrency_util::spin_lock m_lock;
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snd_mixer_t* m_hardwaremixer = nullptr;
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snd_mixer_elem_t* m_mixerelement = nullptr;
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};
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// }}}
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POLYBAR_NS_END
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