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#include "sound.h"
#include "common/io.h"
#include "common/sysctl.h"
#include <fcntl.h>
#include <sys/soundcard.h>
#include <unistd.h>
const char* ffDetectSound(FFSoundOptions* options, FFlist* devices) {
#ifndef __NetBSD__
int defaultDev = ffSysctlGetInt("hw.snd.default_unit", -1);
if (defaultDev == -1) {
return "sysctl(hw.snd.default_unit) failed";
}
#else
int defaultDev;
{
char mixerp[12];
ssize_t plen = readlink("/dev/mixer", mixerp, ARRAY_SIZE(mixerp));
if (plen < 6) {
return "readlink(/dev/mixer) failed";
}
defaultDev = mixerp[plen - 1] - '0';
if (defaultDev < 0 || defaultDev > 9) {
return "Invalid mixer device";
}
}
#endif
char path[] = "/dev/mixer0";
struct oss_sysinfo info = { .nummixers = 9 };
for (int idev = 0; idev <= info.nummixers; ++idev) {
bool isMain = idev == defaultDev;
if ((options->soundType & FF_SOUND_TYPE_MAIN) && !isMain) {
continue;
}
path[strlen("/dev/mixer")] = (char) ('0' + idev);
FF_AUTO_CLOSE_FD int fd = open(path, O_RDWR | O_CLOEXEC);
if (fd < 0) {
break;
}
if (idev == 0) {
if (ioctl(fd, SNDCTL_SYSINFO, &info) != 0) {
return "ioctl(SNDCTL_SYSINFO) failed";
}
}
uint32_t devmask = 0;
if (ioctl(fd, SOUND_MIXER_READ_DEVMASK, &devmask) < 0) {
continue;
}
if (!(devmask & SOUND_MASK_VOLUME)) {
continue;
}
#if defined(SOUND_MIXER_MUTE) && (SOUND_MIXER_MUTE != SOUND_MIXER_NONE)
#define FF_SOUND_HAVE_MIXER_MUTE 1
uint32_t mutemask = 0;
ioctl(fd, SOUND_MIXER_READ_MUTE, &mutemask);
#endif
struct oss_card_info ci = { .card = idev };
if (ioctl(fd, SNDCTL_CARDINFO, &ci) < 0) {
continue;
}
uint32_t volume;
if (ioctl(fd, SOUND_MIXER_READ_VOLUME, &volume) < 0) {
continue;
}
FFSoundDevice* device = FF_LIST_ADD(FFSoundDevice, *devices);
ffStrbufInitS(&device->identifier, path);
ffStrbufInitF(&device->name, "%s %s", ci.longname, ci.hw_info);
ffStrbufTrimRightSpace(&device->name);
ffStrbufInitF(&device->platformApi, "%s %s", info.product, info.version);
device->volume =
#ifdef FF_SOUND_HAVE_MIXER_MUTE
mutemask & SOUND_MASK_VOLUME ? 0 :
#endif
((uint8_t) volume /*left*/ + (uint8_t) (volume >> 8) /*right*/) / 2;
device->type = FF_SOUND_TYPE_ACTIVE | (isMain ? FF_SOUND_TYPE_MAIN : FF_SOUND_TYPE_NONE);
}
return NULL;
}
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