[PPAPI] Implement media stream video track API

ppapi/proxy/video_frame_resource.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/proxy/video_frame_resource.h"
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/shared_impl/var.h"
+
+namespace ppapi {
+namespace proxy {
+
+VideoFrameResource::VideoFrameResource(PP_Instance instance,
+                                       int32_t index,
+                                       MediaStreamFrame::Video* frame)
+    : Resource(OBJECT_IS_PROXY, instance),
+      index_(index),
+      frame_(frame) {
+}
+
+VideoFrameResource::~VideoFrameResource() {
+  CHECK(!frame_) << "An unused (or unrecycled) frame is destroyed.";
+}
+
+thunk::PPB_VideoFrame_API* VideoFrameResource::AsPPB_VideoFrame_API() {
+  return this;
+}
+
+PP_TimeDelta VideoFrameResource::GetTimestamp() {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return 0.0;
+  }
+  return frame_->timestamp;
+}
+
+void VideoFrameResource::SetTimestamp(PP_TimeDelta timestamp) {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return;
+  }
+  frame_->timestamp = timestamp;
+}
+
+PP_VideoFrame_Format VideoFrameResource::GetFormat() {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return PP_VIDEOFRAME_FORMAT_UNKNOWN;
+  }
+  return frame_->format;
+}
+
+PP_Bool VideoFrameResource::GetSize(PP_Size* size) {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return PP_FALSE;
+  }
+  *size = frame_->size;
+  return PP_TRUE;
+}
+
+void* VideoFrameResource::GetDataBuffer() {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return NULL;
+  }
+  return frame_->data;
+}
+
+uint32_t VideoFrameResource::GetDataBufferSize() {
+  if (!frame_) {
+    VLOG(1) << "Frame is invalid";
+    return 0;
+  }
+  return frame_->data_size;
+}
+
+}  // namespace proxy
+}  // namespace ppapi