1#include "sound.h"
 2#include "common/debug.h"
 3#include "common/io.h"
 4
 5#include <fcntl.h>
 6#include <stdint.h>
 7#include <unistd.h>
 8#include <sys/audioio.h>
 9#include <sys/ioctl.h>
10
11const char* ffDetectSound(FFSoundOptions* options, FFlist* devices) {
12    int defaultDev;
13    {
14        char audiop[12];
15        ssize_t plen = readlink("/dev/audio", audiop, ARRAY_SIZE(audiop));
16        if (plen < (ssize_t) strlen("audioN")) {
17            FF_DEBUG("readlink(/dev/audio) failed");
18            return "readlink(/dev/audio) failed";
19        }
20        defaultDev = audiop[plen - 1] - '0';
21        if (defaultDev < 0 || defaultDev > 9) {
22            FF_DEBUG("Invalid audio device");
23            return "Invalid audio device";
24        }
25    }
26
27    char path[] = "/dev/audio0";
28
29    for (int idev = 0; idev < 9; ++idev) {
30        bool isMain = idev == defaultDev;
31        if ((options->soundType & FF_SOUND_TYPE_MAIN) && !isMain) {
32            continue;
33        }
34
35        path[strlen("/dev/audio")] = (char) ('0' + idev);
36        FF_AUTO_CLOSE_FD int fd = open(path, O_RDWR | O_CLOEXEC);
37        if (fd < 0) {
38            break;
39        }
40
41        audio_device_t ad;
42        if (ioctl(fd, AUDIO_GETDEV, &ad) < 0) {
43            continue;
44        }
45
46        audio_info_t ai;
47        if (ioctl(fd, AUDIO_GETINFO, &ai) < 0) {
48            continue;
49        }
50
51        FFSoundDevice* device = FF_LIST_ADD(FFSoundDevice, *devices);
52        ffStrbufInitS(&device->identifier, path);
53        ffStrbufInitS(&device->name, ad.name);
54        ffStrbufTrimRightSpace(&device->name);
55        ffStrbufInitF(&device->platformApi, "%s", "SunAudio");
56        device->volume = (uint8_t) ((ai.play.gain * 100 + AUDIO_MAX_GAIN / 2) / AUDIO_MAX_GAIN);
57        device->type = FF_SOUND_TYPE_ACTIVE | (isMain ? FF_SOUND_TYPE_MAIN : FF_SOUND_TYPE_NONE);
58    }
59
60    return nullptr;
61}