From 97dd433374f7a5e5195fb6c65bdab33740b98e86 Mon Sep 17 00:00:00 2001
From: "piman@chromium.org"
 <piman@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Sat, 6 Aug 2011 03:15:48 +0000
Subject: Video Capture Pepper API

The API is very simple at this point but works end-to-end.

BUG=None
TEST=VideoCapture sample (in a later CL)


Review URL: http://codereview.chromium.org/7553003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95719 0039d316-1c4b-4281-b951-d872f2087c98
---
 content/renderer/pepper_plugin_delegate_impl.cc | 68 ++++++++++++++++++++++++-
 content/renderer/pepper_plugin_delegate_impl.h  |  2 +
 2 files changed, 68 insertions(+), 2 deletions(-)

(limited to 'content')

diff --git a/content/renderer/pepper_plugin_delegate_impl.cc b/content/renderer/pepper_plugin_delegate_impl.cc
index 2ce1076..c061b80 100644
--- a/content/renderer/pepper_plugin_delegate_impl.cc
+++ b/content/renderer/pepper_plugin_delegate_impl.cc
@@ -36,6 +36,7 @@
 #include "content/renderer/gpu/renderer_gl_context.h"
 #include "content/renderer/gpu/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/renderer/media/audio_message_filter.h"
+#include "content/renderer/media/video_capture_impl_manager.h"
 #include "content/renderer/p2p/p2p_transport_impl.h"
 #include "content/renderer/pepper_platform_context_3d_impl.h"
 #include "content/renderer/pepper_platform_video_decoder_impl.h"
@@ -44,6 +45,7 @@
 #include "content/renderer/render_widget_fullscreen_pepper.h"
 #include "content/renderer/webplugin_delegate_proxy.h"
 #include "ipc/ipc_channel_handle.h"
+#include "media/video/capture/video_capture_proxy.h"
 #include "ppapi/c/dev/pp_video_dev.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/c/private/ppb_flash.h"
@@ -73,8 +75,6 @@ using WebKit::WebView;
 
 namespace {
 
-const int32 kDefaultCommandBufferSize = 1024 * 1024;
-
 int32_t PlatformFileToInt(base::PlatformFile handle) {
 #if defined(OS_WIN)
   return static_cast<int32_t>(reinterpret_cast<intptr_t>(handle));
@@ -376,6 +376,64 @@ class QuotaCallbackTranslator : public QuotaDispatcher::Callback {
   scoped_ptr<PluginCallback> callback_;
 };
 
+class PlatformVideoCaptureImpl
+    : public webkit::ppapi::PluginDelegate::PlatformVideoCapture {
+ public:
+  PlatformVideoCaptureImpl(media::VideoCapture::EventHandler* handler)
+      : handler_proxy_(new media::VideoCaptureHandlerProxy(
+            handler, base::MessageLoopProxy::CreateForCurrentThread())) {
+    VideoCaptureImplManager* manager =
+        RenderThread::current()->video_capture_impl_manager();
+    // 1 means the "default" video capture device.
+    // TODO(piman): Add a way to enumerate devices and pass them through the
+    // API.
+    video_capture_ = manager->AddDevice(1, handler_proxy_.get());
+  }
+
+  // Overrides from media::VideoCapture::EventHandler
+  virtual ~PlatformVideoCaptureImpl() {
+    VideoCaptureImplManager* manager =
+        RenderThread::current()->video_capture_impl_manager();
+    manager->RemoveDevice(1, handler_proxy_.get());
+  }
+
+  virtual void StartCapture(
+      EventHandler* handler,
+      const VideoCaptureCapability& capability) OVERRIDE {
+    DCHECK(handler == handler_proxy_->proxied());
+    video_capture_->StartCapture(handler_proxy_.get(), capability);
+  }
+
+  virtual void StopCapture(EventHandler* handler) OVERRIDE {
+    DCHECK(handler == handler_proxy_->proxied());
+    video_capture_->StopCapture(handler_proxy_.get());
+  }
+
+  virtual void FeedBuffer(scoped_refptr<VideoFrameBuffer> buffer) OVERRIDE {
+    video_capture_->FeedBuffer(buffer);
+  }
+
+  virtual bool CaptureStarted() OVERRIDE {
+    return handler_proxy_->state().started;
+  }
+
+  virtual int CaptureWidth() OVERRIDE {
+    return handler_proxy_->state().width;
+  }
+
+  virtual int CaptureHeight() OVERRIDE {
+    return handler_proxy_->state().height;
+  }
+
+  virtual int CaptureFrameRate() OVERRIDE {
+    return handler_proxy_->state().frame_rate;
+  }
+
+ private:
+  scoped_ptr<media::VideoCaptureHandlerProxy> handler_proxy_;
+  media::VideoCapture* video_capture_;
+};
+
 }  // namespace
 
 bool DispatcherWrapper::Init(
@@ -854,6 +912,12 @@ webkit::ppapi::PluginDelegate::PlatformContext3D*
 #endif
 }
 
+webkit::ppapi::PluginDelegate::PlatformVideoCapture*
+PepperPluginDelegateImpl::CreateVideoCapture(
+      media::VideoCapture::EventHandler* handler) {
+  return new PlatformVideoCaptureImpl(handler);
+}
+
 webkit::ppapi::PluginDelegate::PlatformVideoDecoder*
 PepperPluginDelegateImpl::CreateVideoDecoder(
     media::VideoDecodeAccelerator::Client* client,
diff --git a/content/renderer/pepper_plugin_delegate_impl.h b/content/renderer/pepper_plugin_delegate_impl.h
index e465dfe..c7f9886 100644
--- a/content/renderer/pepper_plugin_delegate_impl.h
+++ b/content/renderer/pepper_plugin_delegate_impl.h
@@ -178,6 +178,8 @@ class PepperPluginDelegateImpl
       PlatformAudio::Client* client);
   virtual PlatformImage2D* CreateImage2D(int width, int height);
   virtual PlatformContext3D* CreateContext3D();
+  virtual PlatformVideoCapture* CreateVideoCapture(
+      media::VideoCapture::EventHandler* handler) OVERRIDE;
   virtual PlatformVideoDecoder* CreateVideoDecoder(
       media::VideoDecodeAccelerator::Client* client,
       int32 command_buffer_route_id);
-- 
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