Rename macos device finder

src/engine/macosdevicefinder.cpp

@@ -0,0 +1,115 @@
+/*
+ * 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 <memory>
+
+#include <CoreAudio/AudioHardware.h>
+
+#include <QList>
+#include <QString>
+
+#include "core/logging.h"
+#include "core/scoped_cftyperef.h"
+
+#include "macosdevicefinder.h"
+
+namespace {
+
+template <typename T>
+std::unique_ptr<T> GetProperty(const AudioDeviceID& device_id, const AudioObjectPropertyAddress& address, UInt32* size_bytes_out = nullptr) {
+
+  UInt32 size_bytes = 0;
+  OSStatus status = AudioObjectGetPropertyDataSize(device_id, &address, 0, NULL, &size_bytes);
+  if (status != kAudioHardwareNoError) {
+    qLog(Warning) << "AudioObjectGetPropertyDataSize failed:" << status;
+    return std::unique_ptr<T>();
+  }
+
+  std::unique_ptr<T> ret(reinterpret_cast<T*>(malloc(size_bytes)));
+
+  status = AudioObjectGetPropertyData(device_id, &address, 0, NULL, &size_bytes, ret.get());
+  if (status != kAudioHardwareNoError) {
+    qLog(Warning) << "AudioObjectGetPropertyData failed:" << status;
+    return std::unique_ptr<T>();
+  }
+
+  if (size_bytes_out) {
+    *size_bytes_out = size_bytes;
+  }
+
+  return ret;
+}
+
+}  // namespace
+
+
+MacOsDeviceFinder::MacOsDeviceFinder()
+    : DeviceFinder("osxaudio", { "osxaudio", "osx", "osxaudiosink"} ) {
+}
+
+QList<DeviceFinder::Device> MacOsDeviceFinder::ListDevices() {
+
+  QList<Device> ret;
+
+  AudioObjectPropertyAddress address = {
+    kAudioHardwarePropertyDevices,
+    kAudioObjectPropertyScopeGlobal,
+    kAudioObjectPropertyElementMaster
+  };
+
+  UInt32 device_size_bytes = 0;
+  std::unique_ptr<AudioDeviceID> devices = GetProperty<AudioDeviceID>(kAudioObjectSystemObject, address, &device_size_bytes);
+  if (!devices.get()) {
+    return ret;
+  }
+  const int device_count = device_size_bytes / sizeof(AudioDeviceID);
+
+  address.mScope = kAudioDevicePropertyScopeOutput;
+  for (UInt32 i = 0; i < device_count; ++i) {
+    const AudioDeviceID id = devices.get()[i];
+
+    // Query device name
+    address.mSelector = kAudioDevicePropertyDeviceNameCFString;
+    std::unique_ptr<CFStringRef> device_name = GetProperty<CFStringRef>(id, address);
+    ScopedCFTypeRef<CFStringRef> scoped_device_name(*device_name.get());
+    if (!device_name.get()) {
+      continue;
+    }
+
+    // Determine if the device is an output device (it is an output device if it has output channels)
+    address.mSelector = kAudioDevicePropertyStreamConfiguration;
+    std::unique_ptr<AudioBufferList> buffer_list = GetProperty<AudioBufferList>(id, address);
+    if (!buffer_list.get() || buffer_list->mNumberBuffers == 0) {
+      continue;
+    }
+
+    Device dev;
+    dev.value = id;
+    dev.description = QString::fromUtf8(CFStringGetCStringPtr(*device_name, CFStringGetSystemEncoding()));
+    if (dev.description.isEmpty()) dev.description = QString("Unknown device " + dev.value.toString());
+    dev.iconname = GuessIconName(dev.description);
+    ret.append(dev);
+  }
+  return ret;
+
+}
+