Support audio output device enumeration and selection in PPAPI

ppapi/cpp/dev/audio_output_dev.cc

Index: ppapi/cpp/dev/audio_output_dev.cc
diff --git a/ppapi/cpp/dev/audio_output_dev.cc b/ppapi/cpp/dev/audio_output_dev.cc
new file mode 100644
index 0000000000000000000000000000000000000000..56e55b0923b91eb87e368bfb46b4a39c12d3c740
--- /dev/null
+++ b/ppapi/cpp/dev/audio_output_dev.cc
@@ -0,0 +1,98 @@
+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/cpp/dev/audio_output_dev.h"
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/cpp/instance_handle.h"
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <>
+const char* interface_name<PPB_AudioOutput_Dev_0_1>() {
+  return PPB_AUDIO_OUTPUT_DEV_INTERFACE_0_1;
+}
+
+}  // namespace
+
+AudioOutput_Dev::AudioOutput_Dev() {}
+
+AudioOutput_Dev::AudioOutput_Dev(const InstanceHandle& instance) {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    PassRefFromConstructor(get_interface<PPB_AudioOutput_Dev_0_1>()->Create(
+        instance.pp_instance()));
+  }
+}
+
+AudioOutput_Dev::~AudioOutput_Dev() {}
+
+// static
+bool AudioOutput_Dev::IsAvailable() {
+  return has_interface<PPB_AudioOutput_Dev_0_1>();
+}
+
+int32_t AudioOutput_Dev::EnumerateDevices(
+    const CompletionCallbackWithOutput<std::vector<DeviceRef_Dev> >& callback) {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    return get_interface<PPB_AudioOutput_Dev_0_1>()->EnumerateDevices(
+        pp_resource(), callback.output(), callback.pp_completion_callback());
+  }
+
+  return callback.MayForce(PP_ERROR_NOINTERFACE);
+}
+
+int32_t AudioOutput_Dev::MonitorDeviceChange(
+    PP_MonitorDeviceChangeCallback callback,
+    void* user_data) {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    return get_interface<PPB_AudioOutput_Dev_0_1>()->MonitorDeviceChange(
+        pp_resource(), callback, user_data);
+  }
+
+  return PP_ERROR_NOINTERFACE;
+}
+
+int32_t AudioOutput_Dev::Open(const DeviceRef_Dev& device_ref,
+                              const AudioConfig& config,
+                              PPB_AudioOutput_Callback audio_output_callback,
+                              void* user_data,
+                              const CompletionCallback& callback) {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    return get_interface<PPB_AudioOutput_Dev_0_1>()->Open(
+        pp_resource(), device_ref.pp_resource(), config.pp_resource(),
+        audio_output_callback, user_data, callback.pp_completion_callback());
+  }
+
+  return callback.MayForce(PP_ERROR_NOINTERFACE);
+}
+
+bool AudioOutput_Dev::StartPlayback() {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    return PP_ToBool(
+        get_interface<PPB_AudioOutput_Dev_0_1>()->StartPlayback(pp_resource()));
+  }
+
+  return false;
+}
+
+bool AudioOutput_Dev::StopPlayback() {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    return PP_ToBool(
+        get_interface<PPB_AudioOutput_Dev_0_1>()->StopPlayback(pp_resource()));
+  }
+
+  return false;
+}
+
+void AudioOutput_Dev::Close() {
+  if (has_interface<PPB_AudioOutput_Dev_0_1>()) {
+    get_interface<PPB_AudioOutput_Dev_0_1>()->Close(pp_resource());
+  }
+}
+
+}  // namespace pp