Crude ALSA device selection.

src/CMakeLists.txt

@@ -896,6 +896,14 @@ optional_source(WIN32
     ${CMAKE_SOURCE_DIR}/3rdparty/tinysvcmdns
 )
 
+# Platform specific - Linux
+optional_source(LINUX
+  SOURCES
+    engines/alsadevicefinder.cpp
+  HEADERS
+    engines/alsadevicefinder.h
+)
+
 # Platform specific - X11
 optional_source(LINUX SOURCES widgets/osd_x11.cpp)
 

src/engines/alsadevicefinder.cpp

@@ -0,0 +1,58 @@
+/* This file is part of Clementine.
+   Copyright 2017, Adam Borowski <kilobyte@angband.pl>
+
+   Clementine is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Clementine is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Clementine.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <QFile>
+
+#include "alsadevicefinder.h"
+
+AlsaDeviceFinder::AlsaDeviceFinder()
+    : DeviceFinder("alsasink") {
+}
+
+QList<DeviceFinder::Device> AlsaDeviceFinder::ListDevices() {
+  QList<Device> ret;
+
+  QFile cards("/proc/asound/cards");
+  if (!cards.open(QIODevice::ReadOnly)) return ret;
+
+/* Syntax:
+                        snd_iprintf(buffer, "%2i [%-15s]: %s - %s\n",
+                                        idx,
+                                        card->id,
+                                        card->driver,
+                                        card->shortname);
+                        snd_iprintf(buffer, "                      %s\n",
+                                        card->longname);
+*/
+  QRegExp regid("^ ?(\\d{1,2}) \\[.{15}\\]: .* - .*$");
+  QRegExp regln("^                      (.*)\n");
+
+  while (1) {
+    QString line = cards.readLine();
+    if (regid.indexIn(line) == -1) break;
+    line = cards.readLine();
+    if (regln.indexIn(line) == -1) break;
+
+    Device dev;
+    dev.description = regln.cap(1).remove(QRegExp(" at .*$"));
+    dev.device_property_value = QString("hw:%1").arg(regid.cap(1));
+    dev.icon_name = GuessIconName(dev.description);
+    ret.append(dev);
+  }
+
+  return ret;
+}

src/engines/alsadevicefinder.h

@@ -0,0 +1,31 @@
+/* This file is part of Clementine.
+   Copyright 2017 Adam Borowski <kilobyte@angband.pl>
+
+   Clementine is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Clementine is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Clementine.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef ALSADEVICEFINDER_H
+#define ALSADEVICEFINDER_H
+
+#include "engines/devicefinder.h"
+
+class AlsaDeviceFinder : public DeviceFinder {
+ public:
+  AlsaDeviceFinder();
+
+  virtual bool Initialise() { return true; }
+  virtual QList<Device> ListDevices();
+};
+
+#endif // ALSADEVICEFINDER_H

src/engines/gstengine.cpp

@@ -58,6 +58,10 @@
 #include "engines/pulsedevicefinder.h"
 #endif
 
+#ifdef Q_OS_LINUX
+#include "engines/alsadevicefinder.h"
+#endif
+
 #ifdef Q_OS_DARWIN
 #include "engines/osxdevicefinder.h"
 #endif
@@ -162,6 +166,9 @@ void GstEngine::InitialiseGstreamer() {
 #ifdef HAVE_LIBPULSE
   device_finders.append(new PulseDeviceFinder);
 #endif
+#ifdef Q_OS_LINUX
+  device_finders.append(new AlsaDeviceFinder);
+#endif
 #ifdef Q_OS_DARWIN
   device_finders.append(new OsxDeviceFinder);
 #endif