Media Capabilities: add plumbing between Blink and media/blink/.

third_party/WebKit/Source/modules/media_capabilities/MediaCapabilities.cpp

 // Copyright 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 "modules/media_capabilities/MediaCapabilities.h"
 
+#include "bindings/core/v8/CallbackPromiseAdapter.h"
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "modules/media_capabilities/MediaConfiguration.h"
 #include "modules/media_capabilities/MediaDecodingAbility.h"
+#include "public/platform/Platform.h"
+#include "public/platform/modules/media_capabilities/WebMediaCapabilitiesClient.h"
+#include "public/platform/modules/media_capabilities/WebMediaConfiguration.h"
+#include "public/platform/modules/media_capabilities/WebMediaDecodingAbility.h"
 
 namespace blink {
 
+namespace {
+
+WebAudioConfiguration toWebAudioConfiguration(
+    const AudioConfiguration& configuration) {
+  WebAudioConfiguration webConfiguration;
+
+  // contentType is mandatory.
+  DCHECK(configuration.hasContentType());
+  webConfiguration.contentType = configuration.contentType();
+
+  // channels is optional and will be set to a null WebString if not present.
+  webConfiguration.channels = configuration.hasChannels()
+                                  ? WebString(configuration.channels())
+                                  : WebString();
+
+  if (configuration.hasBitrate())
+    webConfiguration.bitrate = configuration.bitrate();
+
+  if (configuration.hasSamplerate())
+    webConfiguration.samplerate = configuration.samplerate();
+
+  return webConfiguration;
+}
+
+WebVideoConfiguration toWebVideoConfiguration(
+    const VideoConfiguration& configuration) {
+  WebVideoConfiguration webConfiguration;
+
+  // All the properties are mandatory.
+  DCHECK(configuration.hasContentType());
+  webConfiguration.contentType = configuration.contentType();
+
+  DCHECK(configuration.hasWidth());
+  webConfiguration.width = configuration.width();
+
+  DCHECK(configuration.hasHeight());
+  webConfiguration.height = configuration.height();
+
+  DCHECK(configuration.hasBitrate());
+  webConfiguration.bitrate = configuration.bitrate();
+
+  DCHECK(configuration.hasFramerate());
+  webConfiguration.framerate = configuration.framerate();
+
+  return webConfiguration;
+}
+
+WebMediaConfiguration toWebMediaConfiguration(
+    const MediaConfiguration& configuration) {
+  WebMediaConfiguration webConfiguration;
+
+  // type is mandatory.
+  DCHECK(configuration.hasType());
+
+  if (configuration.hasAudio()) {
+    webConfiguration.audioConfiguration =
+        toWebAudioConfiguration(configuration.audio());
+  }
+
+  if (configuration.hasVideo()) {
+    webConfiguration.videoConfiguration =
+        toWebVideoConfiguration(configuration.video());
+  }
+
+  return webConfiguration;
+}
+
+}  // anonymous namespace
+
 MediaCapabilities::MediaCapabilities() = default;
 
 ScriptPromise MediaCapabilities::query(
     ScriptState* scriptState,
     const MediaConfiguration& configuration) {
   ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
   ScriptPromise promise = resolver->promise();
-  resolver->resolve(new MediaDecodingAbility());
+
+  Platform::current()->mediaCapabilitiesClient()->query(
+      toWebMediaConfiguration(configuration),
+      WTF::makeUnique<CallbackPromiseAdapter<MediaDecodingAbility, void>>(
+          resolver));
+
   return promise;
 }
 
 DEFINE_TRACE(MediaCapabilities) {}
 
 }  // namespace blink