1 files changed, 71 insertions, 0 deletions
diff --git a/src/multimedia/alsa/qalsaaudiodevice.cpp b/src/multimedia/alsa/qalsaaudiodevice.cpp
new file mode 100644
index 000000000..893375270
--- /dev/null
+++ b/src/multimedia/alsa/qalsaaudiodevice.cpp
@@ -0,0 +1,71 @@
+// Copyright (C) 2016 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
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of other Qt classes.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// INTERNAL USE ONLY: Do NOT use for any other purpose.
+//
+
+#include "qalsaaudiodevice_p.h"
+
+#include <alsa/version.h>
+
+QT_BEGIN_NAMESPACE
+
+QAlsaAudioDeviceInfo::QAlsaAudioDeviceInfo(const QByteArray &dev, const QString &desc, QAudioDevice::Mode mode)
+    : QAudioDevicePrivate(dev, mode)
+{
+    description = desc;
+
+    checkSurround();
+
+    minimumChannelCount = 1;
+    maximumChannelCount = 2;
+    if (surround71)
+        maximumChannelCount = 8;
+    else if (surround40)
+        maximumChannelCount = 4;
+    else if (surround51)
+        maximumChannelCount = 6;
+
+    minimumSampleRate = 8000;
+    maximumSampleRate = 48000;
+
+    supportedSampleFormats = {
+        QAudioFormat::UInt8,
+        QAudioFormat::Int16,
+        QAudioFormat::Int32,
+        QAudioFormat::Float,
+    };
+
+    preferredFormat.setChannelCount(mode == QAudioDevice::Input ? 1 : 2);
+    preferredFormat.setSampleFormat(QAudioFormat::Float);
+    preferredFormat.setSampleRate(48000);
+}
+
+QAlsaAudioDeviceInfo::~QAlsaAudioDeviceInfo() = default;
+
+void QAlsaAudioDeviceInfo::checkSurround()
+{
+    if (mode != QAudioDevice::Output)
+        return;
+
+    surround40 = false;
+    surround51 = false;
+    surround71 = false;
+
+    if (id.startsWith(QLatin1String("surround40")))
+        surround40 = true;
+    if (id.startsWith(QLatin1String("surround51")))
+        surround51 = true;
+    if (id.startsWith(QLatin1String("surround71")))
+        surround71 = true;
+}
+
+QT_END_NAMESPACE