bluez plugins

最新推荐文章于 2024-06-14 17:02:15 发布

Simons（1075271250@qq

最新推荐文章于 2024-06-14 17:02:15 发布

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本文链接：https://blog.youkuaiyun.com/Luohsh1/article/details/10693293

本文详细介绍了蓝牙插件开发的基本原理和技术实现。包括如何通过实现初始化和退出回调函数来创建蓝牙插件，以及如何利用socket和IO通道进行通信。文中还列举了多种蓝牙插件示例，如音频、输入、网络等。

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When Bluetoothd initializing, it will load plugins in /usr/lib/bluetooth/plugins by default. Actually, most of bluetooth profiles are implemented as plugins in BlueZ.

In plugin.h, it defines:

struct bluetooth_plugin_desc {
const char *name;
int (*init) (void);
void (*exit) (void);
};

#define BLUETOOTH_PLUGIN_DEFINE(name,init,exit) \
struct bluetooth_plugin_desc bluetooth_plugin_desc = { \
name, init, exit \
};

It means that if you want to implement a plugin, just try to implement to callback functions: init and exit. All other communctions should be communicated with socket or IO channel.

Search macro BLUETOOTH_PLUGIN_DEFINE, you will find:

BLUETOOTH_PLUGIN_DEFINE(“audio”, audio_init, audio_exit)
BLUETOOTH_PLUGIN_DEFINE(“input”, input_init, input_exit)
BLUETOOTH_PLUGIN_DEFINE(“network”, network_init, network_exit)
BLUETOOTH_PLUGIN_DEFINE(“echo”, echo_init, echo_exit)
BLUETOOTH_PLUGIN_DEFINE(“storage”, storage_init, storage_exit) //no implementation actually
BLUETOOTH_PLUGIN_DEFINE(“serial”, serial_init, serial_exit)

Implement on serial plugin

Connect to dbus system bus;
btd_register_adapter_driver(&serial_proxy_driver);
btd_register_device_driver(&serial_port_driver);
communicate others with socket and dbus;

Implement on echo

Communicate RFCOMM with socket;
Use IO channel for internal event;

Implement on audio

Connect to Dbus system bus;
Load audio.conf;
According to settings, start headset, audio gateway, sink, source, control service;
Register device drivers;

Implement on input

It is similar with audio.