Support audio output device enumeration and selection in PPAPI

ppapi/thunk/ppb_audio_output_dev_thunk.cc

Index: ppapi/thunk/ppb_audio_output_dev_thunk.cc
diff --git a/ppapi/thunk/ppb_audio_output_dev_thunk.cc b/ppapi/thunk/ppb_audio_output_dev_thunk.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a5f5b12c3753e86ed26f04700de46f5e690d1d2a
--- /dev/null
+++ b/ppapi/thunk/ppb_audio_output_dev_thunk.cc
@@ -0,0 +1,116 @@
+// 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.
+
+// From dev/ppb_audio_output_dev.idl modified Fri Mar 31 08:08:16 2017.
+
+#include <stdint.h>
+
+#include "ppapi/c/dev/ppb_audio_output_dev.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
+#include "ppapi/thunk/ppb_audio_output_api.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance) {
+  VLOG(4) << "PPB_AudioOutput_Dev::Create()";
+  EnterResourceCreation enter(instance);
+  if (enter.failed())
+    return 0;
+  return enter.functions()->CreateAudioOutput(instance);
+}
+
+PP_Bool IsAudioOutput(PP_Resource resource) {
+  VLOG(4) << "PPB_AudioOutput_Dev::IsAudioOutput()";
+  EnterResource<PPB_AudioOutput_API> enter(resource, false);
+  return PP_FromBool(enter.succeeded());
+}
+
+int32_t EnumerateDevices(PP_Resource audio_output,
+                         struct PP_ArrayOutput output,
+                         struct PP_CompletionCallback callback) {
+  VLOG(4) << "PPB_AudioOutput_Dev::EnumerateDevices()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, callback, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult(
+      enter.object()->EnumerateDevices(output, enter.callback()));
+}
+
+int32_t MonitorDeviceChange(PP_Resource audio_output,
+                            PP_MonitorDeviceChangeCallback callback,
+                            void* user_data) {
+  VLOG(4) << "PPB_AudioOutput_Dev::MonitorDeviceChange()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.object()->MonitorDeviceChange(callback, user_data);
+}
+
+int32_t Open(PP_Resource audio_output,
+             PP_Resource device_ref,
+             PP_Resource config,
+             PPB_AudioOutput_Callback audio_output_callback,
+             void* user_data,
+             struct PP_CompletionCallback callback) {
+  VLOG(4) << "PPB_AudioOutput_Dev::Open()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, callback, true);
+  if (enter.failed())
+    return enter.retval();
+  return enter.SetResult(enter.object()->Open(
+      device_ref, config, audio_output_callback, user_data, enter.callback()));
+}
+
+PP_Resource GetCurrentConfig(PP_Resource audio_output) {
+  VLOG(4) << "PPB_AudioOutput_Dev::GetCurrentConfig()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetCurrentConfig();
+}
+
+PP_Bool StartPlayback(PP_Resource audio_output) {
+  VLOG(4) << "PPB_AudioOutput_Dev::StartPlayback()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, true);
+  if (enter.failed())
+    return PP_FALSE;
+  return enter.object()->StartPlayback();
+}
+
+PP_Bool StopPlayback(PP_Resource audio_output) {
+  VLOG(4) << "PPB_AudioOutput_Dev::StopPlayback()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, true);
+  if (enter.failed())
+    return PP_FALSE;
+  return enter.object()->StopPlayback();
+}
+
+void Close(PP_Resource audio_output) {
+  VLOG(4) << "PPB_AudioOutput_Dev::Close()";
+  EnterResource<PPB_AudioOutput_API> enter(audio_output, true);
+  if (enter.failed())
+    return;
+  enter.object()->Close();
+}
+
+const PPB_AudioOutput_Dev_0_1 g_ppb_audiooutput_dev_thunk_0_1 = {
+    &Create, &IsAudioOutput,    &EnumerateDevices, &MonitorDeviceChange,
+    &Open,   &GetCurrentConfig, &StartPlayback,    &StopPlayback,
+    &Close};
+
+}  // namespace
+
+PPAPI_THUNK_EXPORT const PPB_AudioOutput_Dev_0_1*
+GetPPB_AudioOutput_Dev_0_1_Thunk() {
+  return &g_ppb_audiooutput_dev_thunk_0_1;
+}
+
+}  // namespace thunk
+}  // namespace ppapi