Initial commit.

src/engine/pulsedevicefinder.cpp

@@ -0,0 +1,142 @@
+/*
+ * Strawberry Music Player
+ * This file was part of Clementine.
+ * Copyright 2014, David Sansome <me@davidsansome.com>
+ *
+ * Strawberry 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.
+ *
+ * Strawberry 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 Strawberry.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ */
+
+#include "config.h"
+
+#include <QMutex>
+
+#include <pulse/context.h>
+#include <pulse/introspect.h>
+#include <pulse/mainloop.h>
+
+#include "core/logging.h"
+#include "engine/pulsedevicefinder.h"
+
+PulseDeviceFinder::PulseDeviceFinder() : DeviceFinder("pulsesink"), mainloop_(nullptr), context_(nullptr) {
+}
+
+bool PulseDeviceFinder::Initialise() {
+
+  mainloop_ = pa_mainloop_new();
+  if (!mainloop_) {
+    qLog(Warning) << "Failed to create pulseaudio mainloop";
+    return false;
+  }
+
+  return Reconnect();
+}
+
+bool PulseDeviceFinder::Reconnect() {
+
+  if (context_) {
+    pa_context_disconnect(context_);
+    pa_context_unref(context_);
+  }
+
+  context_ = pa_context_new(pa_mainloop_get_api(mainloop_), "Strawberry device finder");
+  if (!context_) {
+    qLog(Warning) << "Failed to create pulseaudio context";
+    return false;
+  }
+
+  if (pa_context_connect(context_, nullptr, PA_CONTEXT_NOFLAGS, nullptr) < 0) {
+    qLog(Warning) << "Failed to connect pulseaudio context";
+    return false;
+  }
+
+  // Wait for the context to be connected.
+  forever {
+    const pa_context_state state = pa_context_get_state(context_);
+    if (state == PA_CONTEXT_FAILED || state == PA_CONTEXT_TERMINATED) {
+      qLog(Warning) << "Connection to pulseaudio failed";
+      return false;
+    }
+
+    if (state == PA_CONTEXT_READY) {
+      return true;
+    }
+
+    pa_mainloop_iterate(mainloop_, true, nullptr);
+  }
+}
+
+QList<DeviceFinder::Device> PulseDeviceFinder::ListDevices() {
+
+  if (!context_ || pa_context_get_state(context_) != PA_CONTEXT_READY) {
+    return QList<Device>();
+  }
+
+retry:
+  ListDevicesState state;
+  pa_context_get_sink_info_list(context_, &PulseDeviceFinder::GetSinkInfoCallback, &state);
+
+  forever {
+    if (state.finished) {
+      return state.devices;
+    }
+
+    switch (pa_context_get_state(context_)) {
+    case PA_CONTEXT_READY:
+      break;
+    case PA_CONTEXT_FAILED:
+    case PA_CONTEXT_TERMINATED:
+      // Maybe pulseaudio died.  Try reconnecting.
+      if (Reconnect()) {
+        goto retry;
+      }
+      return state.devices;
+    default:
+      return state.devices;
+    }
+
+    pa_mainloop_iterate(mainloop_, true, nullptr);
+  }
+}
+
+void PulseDeviceFinder::GetSinkInfoCallback(pa_context *c, const pa_sink_info *info, int eol, void *state_voidptr) {
+
+  ListDevicesState *state = reinterpret_cast<ListDevicesState*>(state_voidptr);
+
+  if (info) {
+    Device dev;
+    dev.device_property_value = QString::fromUtf8(info->name);
+    dev.description = QString::fromUtf8(info->description);
+    dev.iconname = QString::fromUtf8(pa_proplist_gets(info->proplist, "device.icon_name"));
+
+    state->devices.append(dev);
+  }
+
+  if (eol) {
+    state->finished = true;
+  }
+}
+
+PulseDeviceFinder::~PulseDeviceFinder() {
+
+  if (context_) {
+    pa_context_disconnect(context_);
+    pa_context_unref(context_);
+  }
+
+  if (mainloop_) {
+    pa_mainloop_free(mainloop_);
+  }
+}
+