111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/*
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* Strawberry Music Player
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* Copyright 2017-2021, Jonas Kvinge <jonas@jkvinge.net>
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*
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* Strawberry is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Strawberry is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "config.h"
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#include <cstdio>
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#include <cerrno>
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#include <alsa/asoundlib.h>
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#include <QString>
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#include <QScopeGuard>
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#include <core/logging.h>
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#include "alsadevicefinder.h"
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#include "enginedevice.h"
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AlsaDeviceFinder::AlsaDeviceFinder() : DeviceFinder(QStringLiteral("alsa"), { QStringLiteral("alsa"), QStringLiteral("alsasink") }) {}
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EngineDeviceList AlsaDeviceFinder::ListDevices() {
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EngineDeviceList devices;
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snd_pcm_stream_name(SND_PCM_STREAM_PLAYBACK);
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int card = -1;
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snd_ctl_card_info_t *cardinfo = nullptr;
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snd_ctl_card_info_alloca(&cardinfo);
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while (true) {
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int result = snd_card_next(&card);
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if (result < 0) {
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qLog(Error) << "Unable to get soundcard:" << snd_strerror(result);
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break;
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}
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if (card < 0) break;
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char str[32];
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snprintf(str, sizeof(str) - 1, "hw:%d", card);
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snd_ctl_t *handle = nullptr;
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result = snd_ctl_open(&handle, str, 0);
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if (result < 0) {
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qLog(Error) << "Unable to open soundcard" << card << ":" << snd_strerror(result);
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continue;
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}
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const QScopeGuard snd_ctl_handle_close = qScopeGuard([&handle]() { snd_ctl_close(handle); });
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result = snd_ctl_card_info(handle, cardinfo);
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if (result < 0) {
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qLog(Error) << "Control hardware failure for card" << card << ":" << snd_strerror(result);
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continue;
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}
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int dev = -1;
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snd_pcm_info_t *pcminfo = nullptr;
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snd_pcm_info_alloca(&pcminfo);
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while (true) {
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result = snd_ctl_pcm_next_device(handle, &dev);
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if (result < 0) {
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qLog(Error) << "Unable to get PCM for card" << card << ":" << snd_strerror(result);
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continue;
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}
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if (dev < 0) break;
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snd_pcm_info_set_device(pcminfo, dev);
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snd_pcm_info_set_subdevice(pcminfo, 0);
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snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
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result = snd_ctl_pcm_info(handle, pcminfo);
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if (result < 0) {
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if (result != -ENOENT) qLog(Error) << "Unable to get control digital audio info for card" << card << ":" << snd_strerror(result);
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continue;
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}
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EngineDevice device;
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device.description = QStringLiteral("%1 %2").arg(QString::fromUtf8(snd_ctl_card_info_get_name(cardinfo)), QString::fromUtf8(snd_pcm_info_get_name(pcminfo)));
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device.iconname = device.GuessIconName();
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device.card = card;
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device.device = dev;
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device.value = QStringLiteral("hw:%1,%2").arg(card).arg(dev);
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devices.append(device);
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device.value = QStringLiteral("plughw:%1,%2").arg(card).arg(dev);
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devices.append(device);
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}
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}
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snd_config_update_free_global();
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return devices;
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}
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