1 files changed, 108 insertions, 0 deletions
diff --git a/src/multimedia/alsa/qalsamediadevices.cpp b/src/multimedia/alsa/qalsamediadevices.cpp
new file mode 100644
index 000000000..5a133e9d1
--- /dev/null
+++ b/src/multimedia/alsa/qalsamediadevices.cpp
@@ -0,0 +1,108 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include "qalsamediadevices_p.h"
+#include "qmediadevices.h"
+#include "qcameradevice_p.h"
+
+#include "private/qalsaaudiosource_p.h"
+#include "private/qalsaaudiosink_p.h"
+#include "private/qalsaaudiodevice_p.h"
+
+#include <alsa/asoundlib.h>
+
+QT_BEGIN_NAMESPACE
+
+QAlsaMediaDevices::QAlsaMediaDevices()
+    : QPlatformMediaDevices()
+{
+}
+
+static QList<QAudioDevice> availableDevices(QAudioDevice::Mode mode)
+{
+    QList<QAudioDevice> devices;
+
+    QByteArray filter;
+
+    // Create a list of all current audio devices that support mode
+    void **hints, **n;
+    char *name, *descr, *io;
+    bool hasDefault = false;
+
+    if(snd_device_name_hint(-1, "pcm", &hints) < 0) {
+        qWarning() << "no alsa devices available";
+        return devices;
+    }
+    n = hints;
+
+    if(mode == QAudioDevice::Input) {
+        filter = "Input";
+    } else {
+        filter = "Output";
+    }
+
+    QAlsaAudioDeviceInfo* sysdefault = nullptr;
+
+    while (*n != NULL) {
+        name = snd_device_name_get_hint(*n, "NAME");
+        if (name != 0 && qstrcmp(name, "null") != 0) {
+            descr = snd_device_name_get_hint(*n, "DESC");
+            io = snd_device_name_get_hint(*n, "IOID");
+
+            if ((descr != NULL) && ((io == NULL) || (io == filter))) {
+                auto *infop = new QAlsaAudioDeviceInfo(name, QString::fromUtf8(descr), mode);
+                devices.append(infop->create());
+                if (!hasDefault && strcmp(name, "default") == 0) {
+                    infop->isDefault = true;
+                    hasDefault = true;
+                }
+                else if (!sysdefault && !hasDefault && strcmp(name, "sysdefault") == 0) {
+                    sysdefault = infop;
+                }
+            }
+
+            free(descr);
+            free(io);
+        }
+        free(name);
+        ++n;
+    }
+    snd_device_name_free_hint(hints);
+
+    if (!hasDefault && sysdefault) {
+        // Make "sysdefault" the default device if there is no "default" device exists
+        sysdefault->isDefault = true;
+        hasDefault = true;
+    }
+    if (!hasDefault && devices.size() > 0) {
+        auto infop = new QAlsaAudioDeviceInfo("default", QString(), QAudioDevice::Output);
+        infop->isDefault = true;
+        devices.prepend(infop->create());
+    }
+
+    return devices;
+}
+
+QList<QAudioDevice> QAlsaMediaDevices::audioInputs() const
+{
+    return availableDevices(QAudioDevice::Input);
+}
+
+QList<QAudioDevice> QAlsaMediaDevices::audioOutputs() const
+{
+    return availableDevices(QAudioDevice::Output);
+}
+
+QPlatformAudioSource *QAlsaMediaDevices::createAudioSource(const QAudioDevice &deviceInfo,
+                                                           QObject *parent)
+{
+    return new QAlsaAudioSource(deviceInfo.id(), parent);
+}
+
+QPlatformAudioSink *QAlsaMediaDevices::createAudioSink(const QAudioDevice &deviceInfo,
+                                                       QObject *parent)
+{
+    return new QAlsaAudioSink(deviceInfo.id(), parent);
+}
+
+QT_END_NAMESPACE