~schnouki/pustule

ref: 2e90522e70214bb6d1bb88aef6f7d8c06152a99f pustule/pustule.h -rw-r--r-- 4.1 KiB
2e90522e — Thomas Jost Expose log functions in Lua 1 year, 1 month ago 
                                                                                
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/**
 * pustule
 * Copyright 2014-2020 Thomas Jost <schnouki@schnouki.net>
 *
 * This file is part of pustule.
 *
 * pustule is free software: you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later
 * version.
 *
 * pustule is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * pustule. If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef PUSTULE_H
#define PUSTULE_H

#define PUSTULE_VERSION "pustule 0.1"

#include <stdbool.h>

#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <pulse/pulseaudio.h>

/* Data structures */
typedef struct {
    uint32_t index;
    char* name;
    char* driver;
    int mute;
    int volume_writable;
    int has_volume;
    pa_cvolume volume;
    pa_proplist* proplist;
} pustule_input_event_t;

typedef struct {
    uint32_t index;
    char* name;
    char* description;
    int mute;
    pa_cvolume volume;
    pa_proplist* proplist;
} pustule_device_event_t;

typedef struct {
    enum {
        INPUT_ADDED,
        INPUT_REMOVED,
        DEVICE_ADDED,
        DEVICE_REMOVED,
    } type;
    union {
        pustule_input_event_t input_event;
        pustule_device_event_t device_event;
    };
} pustule_event_t;

typedef void (*pustule_volume_callback_t)(double volume, void* userdata);

typedef struct {
    const char* user_name;
    const char* host_name;
    const char* server_name;
    const char* server_version;
    const char* default_sink_name;
} pustule_server_info_t;
typedef void (*pustule_server_info_callback_t)(pustule_server_info_t* info, void* userdata);

typedef struct {
    size_t capacity;
    size_t size;
    intptr_t* array;
} array_t;

/* PulseAudio callbacks */
void event_callback(pa_context* ctx, pa_subscription_event_type_t t, uint32_t idx, void* userdata);
void input_info_callback(pa_context* ctx, const pa_sink_input_info* i, int eol, void* userdata);
void device_info_callback(pa_context* ctx, const pa_sink_info* i, int eol, void* userdata);
void state_callback(pa_context* ctx, void* userdata);

/* PulseAudio query functions */
void input_get_volume(uint32_t idx, pustule_volume_callback_t callback, void* userdata);
void device_get_volume(uint32_t idx, pustule_volume_callback_t callback, void* userdata);
void server_get_info(pustule_server_info_callback_t callback, void* userdata);

/* Dynamic array functions */
void array_init(array_t* arr);
void array_push(array_t* arr, intptr_t value);
bool array_find(array_t* arr, intptr_t value, size_t* idx);
void array_remove(array_t* arr, intptr_t value);

/* Lua module */
void init_lua_module(lua_State* L);
int luaopen_pustule(lua_State* L);

/* Functions exported in the Lua module */
int pustule_connect_signal(lua_State* L);
int pustule_disconnect_signal(lua_State* L);

/* Lua query functions */
int pustule_get_input_volume(lua_State* L);
int pustule_set_input_volume(lua_State* L);
int pustule_get_device_volume(lua_State* L);
int pustule_set_device_volume(lua_State* L);
int pustule_get_default_device(lua_State* L);
int pustule_set_default_device(lua_State* L);
int pustule_suspend_device(lua_State* L);

/* Lua log functions */
int lua_log_debug(lua_State* L);
int lua_log_info(lua_State* L);
int lua_log_warn(lua_State* L);
int lua_log_error(lua_State* L);

/* Lua helpers */
void pustule_push_input_event(lua_State* L, pustule_input_event_t* event);
void pustule_push_device_event(lua_State* L, pustule_device_event_t* event);
bool check_pcall_error(lua_State* L, int res);

/* Pustule event loop */
void pustule_handle_event(pustule_event_t* event);

/* Global variables */
extern pa_context* pactx;
extern pa_mainloop* paloop;
extern lua_State* g_L;
extern array_t input_added_listeners;
extern array_t input_removed_listeners;
extern array_t device_added_listeners;
extern array_t device_removed_listeners;

#endif