add components for integration test which will detect breakage of media pipeline with video capture as video decoder.

This patch does NOT depend on the WebKit patch (https://bugs.webkit.org/show_bug.cgi?id=74882) any longer, since a utility class MediaStreamUtil has been added in webkit_support. On the opposite, that WebKit patch depends on this one.

There are 2 API's for webkit_support::CreateMediaPlayer in order to be backward compatible with WebKit. Once WebKit patch is landed, the old API (with 2 arguments) can be removed.

In that WebKit patch, WebViewHost uses WebKit::WebUserMediaClientMock to return a userMediaClient.
A mocked webkit_media::MediaStreamClient is used in webkit_support::CreateMediaPlayer.

BUG=none
TEST=run video-capture-preview.html
Review URL: http://codereview.chromium.org/8887004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@116749 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 37 insertions, 0 deletions

diff --git a/webkit/support/test_media_stream_client.cc b/webkit/support/test_media_stream_client.cc
new file mode 100644
index 0000000..4ca3e81
--- /dev/null
+++ b/webkit/support/test_media_stream_client.cc
@@ -0,0 +1,37 @@
+// Copyright (c) 2012 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 "webkit/support/test_media_stream_client.h"
+
+#include "googleurl/src/gurl.h"
+#include "media/base/message_loop_factory.h"
+#include "media/base/pipeline.h"
+#include "media/filters/video_frame_generator.h"
+
+namespace {
+
+static const int kVideoCaptureWidth = 352;
+static const int kVideoCaptureHeight = 288;
+static const int kVideoCaptureFrameDurationMs = 33;
+
+}  // namespace
+
+namespace webkit_support {
+
+TestMediaStreamClient::TestMediaStreamClient(MediaStreamUtil* media_stream_util)
+    : media_stream_util_(media_stream_util) {
+}
+
+scoped_refptr<media::VideoDecoder> TestMediaStreamClient::GetVideoDecoder(
+    const GURL& url, media::MessageLoopFactory* message_loop_factory) {
+  if (!media_stream_util_ || !media_stream_util_->IsMockStream(url))
+    return NULL;
+
+  return new media::VideoFrameGenerator(
+      message_loop_factory->GetMessageLoopProxy("CaptureVideoDecoder").get(),
+      gfx::Size(kVideoCaptureWidth, kVideoCaptureHeight),
+      base::TimeDelta::FromMilliseconds(kVideoCaptureFrameDurationMs));
+}
+
+}  // namespace webkit_support