This is where the PulseAudio library comes into play. It provides a simple API for enumerating devices and selecting one of them. The following code snippet shows how to list all available output devices using C++:
“`c++
// This script uses the PulseAudio library to list all available output devices using C++.
#include int main() {
#include
pa_context *ctx; // Declaring a pointer to a PulseAudio context
const char *server = “unix:/run/user/1000/pulse/native”; // Replace with the server path of your own system
int err;
if ((err = pa_context_connect(server, NULL, PA_CONTEXT_NOSTREAM)) < 0) { // Connecting to the PulseAudio server
std::cerr << "Failed to connect: " << pa_strerror(err) << '\n'; // Printing error message if connection fails
return 1;
}
const char *const devices[] = {"output"}; // Declaring an array of output devices
int n_devices;
if ((err = pa_context_get_source_info_list(ctx, devices, &n_devices)) < 0) { // Getting the list of available output devices
std::cerr << "Failed to get source info: " << pa_strerror(err) << '\n'; // Printing error message if getting the list fails
return 1;
}
for (int i = 0; i < n_devices; ++i) { // Looping through the list of devices
const char *name, *driver, *device;
int index;
if ((err = pa_context_get_source_info(ctx, devices[i], &index, NULL, &name, &driver, &device)) < 0) { // Getting information about each device
std::cerr << "Failed to get source info: " << pa_strerror(err) << '\n'; // Printing error message if getting information fails
return 1;
}
std::cout << i+1 << ": " << name << ", driver: " << driver << ", device: " << device << '\n'; // Printing the device name, driver, and device information
}
if ((err = pa_context_disconnect(ctx)) < 0) { // Disconnecting from the PulseAudio server
std::cerr << "Failed to disconnect: " << pa_strerror(err) << '\n'; // Printing error message if disconnection fails
return 1;
}
return 0;
}
```
In this code, we first create a new PulseAudio context and connect it to the server. Then we list all output devices using `pa_context_get_source_info_list()`. This function returns an array of source info structures that contain information about each device. We iterate over them and print their names, drivers, and indices. Finally, we disconnect from the context and exit gracefully.
The specific functions used in this process are: `pa_context_connect()`, `pa_context_get_source_info_list()`, and `pa_context_disconnect()`. These functions provide a simple API for enumerating devices and selecting one of them using C++.