test a virtual surround setup with miniaudio

audio.c

#include <math.h>
#include <unistd.h>
#define MINIAUDIO_IMPLEMENTATION
#include "miniaudio.h"
#include <string.h>
#include <stdio.h>

// name of the device to find
// this is a virtual device which combines 2 stereo devices to get surround
// created with pactl load-module module-null-sink sink_name=combinedDevice object.linger=1 media.class=Audio/Sink channel_map=FL,FR,RL,RR
// then linking monitor of each channel to an output with qpwgraph
#define DEVICE_NAME "combinedDevice Audio/Sink sink"

int main(int argc, char** argv) {

	ma_result result;
	ma_engine engine;
	ma_sound sound;
	ma_engine_config engineConfig;
	ma_context context;
	ma_device_info* deviceInfo;
	ma_device_config deviceConfig;
	ma_uint32 deviceCount;
	ma_device device;

	ma_context_config contextConfig = ma_context_config_init();
	contextConfig.pulse.pApplicationName = "C AUDIO BACKEND";

	ma_backend backends[] = { ma_backend_pulseaudio};

	result = ma_context_init(backends, 2, &contextConfig, &context);
	if (result != MA_SUCCESS) {
		printf("failed to get context\n");
		return -1;
	}

	result = ma_context_get_devices(&context, &deviceInfo, &deviceCount,NULL, NULL);
	    if (result != MA_SUCCESS) {
        printf("Failed to enumerate playback devices.\n");
        ma_context_uninit(&context);
        return -1;
    }

	
	engineConfig = ma_engine_config_init();

	printf("DEVICES FOR FUTURE REFERENCE\n");
	for (int i = 0; i < deviceCount; i++) {
		printf("%d: %s\n", i, deviceInfo[i].name);
	}

	for (int i = 0; i < deviceCount; i++) {
		if (strcmp(deviceInfo[i].name, DEVICE_NAME) == 0) {
			printf("using %d: %s\n", i, deviceInfo[i].name);
			//deviceConfig.playback.pDeviceID = &deviceInfo[i].id;
			engineConfig.pPlaybackDeviceID = &deviceInfo[i].id;
			break;
		}
	}

	//deviceConfig.playback.channelMixMode = ma_channel_mix_mode_rectangular;
	//deviceConfig.playback.channels = 4;
	//ma_channel channelMap[] = {MA_CHANNEL_FRONT_LEFT, MA_CHANNEL_FRONT_RIGHT, MA_CHANNEL_BACK_LEFT, MA_CHANNEL_BACK_RIGHT};
	//deviceConfig.playback.pChannelMap = channelMap;

	//result = ma_device_init(&context, &deviceConfig, &device);





	// engineConfig.channels = 4;
	// engineConfig.pPlaybackDeviceID = 0;
	// engineConfig.listenerCount = 1;
	// engineConfig.sampleRate = 48000;
	
	// engineConfig.pDevice = &device;
	// ma_channel channelMap[] = {MA_CHANNEL_FRONT_LEFT, MA_CHANNEL_FRONT_RIGHT, MA_CHANNEL_BACK_LEFT, MA_CHANNEL_BACK_RIGHT};



	result = ma_engine_init(&engineConfig, &engine);
	if (result != MA_SUCCESS) {
		printf("Failed to init audio engine\n");
		return -1;
	}


	// play test sound close to each speaker
	result = ma_sound_init_from_file(&engine, "FL.flac", 0, NULL, NULL, &sound);
	ma_sound_set_position(&sound, -1.0, 0.0, -1.0);
	result = ma_sound_start(&sound);
	sleep(2);
	ma_sound_uninit(&sound);

	result = ma_sound_init_from_file(&engine, "FR.flac", 0, NULL, NULL, &sound);
	ma_sound_set_position(&sound, 1.0, 0.0, -1.0);
	result = ma_sound_start(&sound);
	sleep(2);
	ma_sound_uninit(&sound);

	result = ma_sound_init_from_file(&engine, "RL.flac", 0, NULL, NULL, &sound);
	ma_sound_set_position(&sound, -1.0, 0.0, 1.0);
	result = ma_sound_start(&sound);
	sleep(2);
	ma_sound_uninit(&sound);

	result = ma_sound_init_from_file(&engine, "RR.flac", 0, NULL, NULL, &sound);
	ma_sound_set_position(&sound, 1.0, 0.0, 1.0);
	result = ma_sound_start(&sound);
	sleep(2);
	ma_sound_uninit(&sound);



	

	return 0;
}