[NOT FOR REVIEW][PPAPI] Implement MediaStreamVideoTrack pepper API

ppapi/thunk/ppb_video_frame_thunk.cc

+// Copyright 2014 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/c/pp_errors.h"
+#include "ppapi/c/ppb_video_frame.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_instance_api.h"
+#include "ppapi/thunk/ppb_video_frame_api.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace thunk {
+
+namespace {
+
+PP_Bool IsVideoFrame(PP_Resource resource) {
+  VLOG(4) << "PPB_VideoFrame::IsVideoFrame()";
+  EnterResource<PPB_VideoFrame_API> enter(resource, false);
+  return PP_FromBool(enter.succeeded());
+}
+
+PP_TimeDelta GetTimestamp(PP_Resource frame) {
+  VLOG(4) << "PPB_VideoFrame::GetTimestamp()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return 0.0;
+  return enter.object()->GetTimestamp();
+}
+
+void SetTimestamp(PP_Resource frame, PP_TimeDelta timestamp) {
+  VLOG(4) << "PPB_VideoFrame::SetTimestamp()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return;
+  return enter.object()->SetTimestamp(timestamp);
+}
+
+PP_VideoFrame_Format GetFormat(PP_Resource frame) {
+  VLOG(4) << "PPB_VideoFrame::GetFormat()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return PP_VIDEOFRAME_FORMAT_UNKNOWN;
+  return enter.object()->GetFormat();
+}
+
+PP_Bool GetSize(PP_Resource frame, struct PP_Size* size) {
+  VLOG(4) << "PPB_VideoFrame::GetSize()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return PP_FALSE;
+  return enter.object()->GetSize(size);
+}
+
+void* GetDataBuffer(PP_Resource frame) {
+  VLOG(4) << "PPB_VideoFrame::GetDataBuffer()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return NULL;
+  return enter.object()->GetDataBuffer();
+}
+
+uint32_t GetDataBufferSize(PP_Resource frame) {
+  VLOG(4) << "PPB_VideoFrame::GetDataBufferSize()";
+  EnterResource<PPB_VideoFrame_API> enter(frame, true);
+  if (enter.failed())
+    return 0;
+  return enter.object()->GetDataBufferSize();
+}
+
+const PPB_VideoFrame_0_1 g_ppb_videoframe_thunk_0_1 = {
+  &IsVideoFrame,
+  &GetTimestamp,
+  &SetTimestamp,
+  &GetFormat,
+  &GetSize,
+  &GetDataBuffer,
+  &GetDataBufferSize,
+};
+
+}  // namespace
+
+const PPB_VideoFrame_0_1* GetPPB_VideoFrame_0_1_Thunk() {
+  return &g_ppb_videoframe_thunk_0_1;
+}
+
+}  // namespace thunk
+}  // namespace ppapi