media: Optimize HW Video to 2D Canvas copy.

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index f5dd958ba5c10fd7a5cce1640997d7ee6dcfd3a0..61cd4f8c9dbfc25d870d868bf6a67da35497d058 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -39,8 +39,7 @@
 #include "media/base/media_switches.h"
 #include "media/base/video_frame.h"
 #include "net/base/mime_util.h"
-#include "third_party/WebKit/public/platform/Platform.h"
-#include "third_party/WebKit/public/platform/WebGraphicsContext3DProvider.h"
+#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/WebKit/public/platform/WebMediaPlayerClient.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
@@ -49,10 +48,12 @@
 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
 #include "third_party/WebKit/public/web/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/web/WebView.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 #include "ui/gfx/image/image.h"
+#include "webkit/common/gpu/context_provider_web_context.h"
+#include "webkit/common/gpu/webgraphicscontext3d_impl.h"
 
 static const uint32 kGLTextureExternalOES = 0x8D65;
 
@@ -79,23 +80,6 @@ void OnReleaseTexture(
   gl->DeleteTextures(1, &texture_id);
 }
 
-class SyncPointClientImpl : public media::VideoFrame::SyncPointClient {
- public:
-  explicit SyncPointClientImpl(
-      blink::WebGraphicsContext3D* web_graphics_context)
-      : web_graphics_context_(web_graphics_context) {}
-  virtual ~SyncPointClientImpl() {}
-  virtual uint32 InsertSyncPoint() OVERRIDE {
-    return web_graphics_context_->insertSyncPoint();
-  }
-  virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE {
-    web_graphics_context_->waitSyncPoint(sync_point);
-  }
-
- private:
-  blink::WebGraphicsContext3D* web_graphics_context_;
-};
-
 }  // namespace
 
 namespace content {
@@ -461,79 +445,26 @@ bool WebMediaPlayerAndroid::didLoadingProgress() {
   return ret;
 }
 
-bool WebMediaPlayerAndroid::EnsureTextureBackedSkBitmap(GrContext* gr,
-                                                        SkBitmap& bitmap,
-                                                        const WebSize& size,
-                                                        GrSurfaceOrigin origin,
-                                                        GrPixelConfig config) {
-  if (!bitmap.getTexture() || bitmap.width() != size.width
-      || bitmap.height() != size.height) {
-    if (!gr)
-      return false;
-    GrTextureDesc desc;
-    desc.fConfig = config;
-    desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
-    desc.fSampleCnt = 0;
-    desc.fOrigin = origin;
-    desc.fWidth = size.width;
-    desc.fHeight = size.height;
-    skia::RefPtr<GrTexture> texture;
-    texture = skia::AdoptRef(gr->createUncachedTexture(desc, 0, 0));
-    if (!texture.get())
-      return false;
-
-    SkImageInfo info = SkImageInfo::MakeN32Premul(desc.fWidth, desc.fHeight);
-    SkGrPixelRef* pixelRef = SkNEW_ARGS(SkGrPixelRef, (info, texture.get()));
-    if (!pixelRef)
-      return false;
-    bitmap.setInfo(info);
-    bitmap.setPixelRef(pixelRef)->unref();
-  }
-
-  return true;
-}
-
 void WebMediaPlayerAndroid::paint(blink::WebCanvas* canvas,
                                   const blink::WebRect& rect,
                                   unsigned char alpha) {
-  scoped_ptr<blink::WebGraphicsContext3DProvider> provider =
-    scoped_ptr<blink::WebGraphicsContext3DProvider>(blink::Platform::current(
-      )->createSharedOffscreenGraphicsContext3DProvider());
-  if (!provider)
-    return;
-  blink::WebGraphicsContext3D* context3D = provider->context3d();
-  if (!context3D || !context3D->makeContextCurrent())
-    return;
-
-  // Copy video texture into a RGBA texture based bitmap first as video texture
-  // on Android is GL_TEXTURE_EXTERNAL_OES which is not supported by Skia yet.
-  // The bitmap's size needs to be the same as the video and use naturalSize()
-  // here. Check if we could reuse existing texture based bitmap.
-  // Otherwise, release existing texture based bitmap and allocate
-  // a new one based on video size.
-  if (!EnsureTextureBackedSkBitmap(provider->grContext(), bitmap_,
-      naturalSize(), kTopLeft_GrSurfaceOrigin, kSkia8888_GrPixelConfig)) {
+  // Don't allow clients to copy an encrypted video frame.
+  if (needs_external_surface_)
     return;
-  }
 
-  unsigned textureId = static_cast<unsigned>(
-    (bitmap_.getTexture())->getTextureHandle());
-  if (!copyVideoTextureToPlatformTexture(context3D, textureId, 0,
-      GL_RGBA, GL_UNSIGNED_BYTE, true, false)) {
-    return;
+  scoped_refptr<VideoFrame> video_frame;
+  {
+    base::AutoLock auto_lock(current_frame_lock_);
+    video_frame = current_frame_;
   }
 
-  // Draw the texture based bitmap onto the Canvas. If the canvas is
-  // hardware based, this will do a GPU-GPU texture copy.
-  // If the canvas is software based, the texture based bitmap will be
-  // readbacked to system memory then draw onto the canvas.
-  SkRect dest;
-  dest.set(rect.x, rect.y, rect.x + rect.width, rect.y + rect.height);
-  SkPaint paint;
-  paint.setAlpha(alpha);
-  // It is not necessary to pass the dest into the drawBitmap call since all
-  // the context have been set up before calling paintCurrentFrameInContext.
-  canvas->drawBitmapRect(bitmap_, 0, dest, &paint);
+  gfx::Rect gfx_rect(rect);
+  scoped_refptr<cc::ContextProvider> context_provider =
+      RenderThreadImpl::current()->SharedMainThreadContextProvider();
+  media::SkCanvasVideoRenderer::ContextProvider provider{
+      context_provider->ContextGL(), context_provider->GrContext()};
+  skcanvas_video_renderer_.Paint(
+      video_frame.get(), canvas, gfx_rect, alpha, &provider);
 }
 
 bool WebMediaPlayerAndroid::copyVideoTextureToPlatformTexture(
@@ -557,10 +488,13 @@ bool WebMediaPlayerAndroid::copyVideoTextureToPlatformTexture(
   if (!video_frame ||
       video_frame->format() != media::VideoFrame::NATIVE_TEXTURE)
     return false;
+
+#if DCHECK_IS_ON
   const gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
   DCHECK((!is_remote_ &&
           mailbox_holder->texture_target == GL_TEXTURE_EXTERNAL_OES) ||
          (is_remote_ && mailbox_holder->texture_target == GL_TEXTURE_2D));
+#endif
 
   // For hidden video element (with style "display:none"), ensure the texture
   // size is set.
@@ -572,35 +506,19 @@ bool WebMediaPlayerAndroid::copyVideoTextureToPlatformTexture(
     cached_stream_texture_size_ = natural_size_;
   }
 
-  web_graphics_context->waitSyncPoint(mailbox_holder->sync_point);
-
-  // Ensure the target of texture is set before copyTextureCHROMIUM, otherwise
-  // an invalid texture target may be used for copy texture.
-  uint32 src_texture = web_graphics_context->createAndConsumeTextureCHROMIUM(
-      mailbox_holder->texture_target, mailbox_holder->mailbox.name);
-
-  // The video is stored in an unmultiplied format, so premultiply if
-  // necessary.
-  web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
-                                    premultiply_alpha);
-
-  // Application itself needs to take care of setting the right flip_y
-  // value down to get the expected result.
-  // flip_y==true means to reverse the video orientation while
-  // flip_y==false means to keep the intrinsic orientation.
-  web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, flip_y);
-  web_graphics_context->copyTextureCHROMIUM(GL_TEXTURE_2D, src_texture,
-                                            texture, level, internal_format,
-                                            type);
-  web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, false);
-  web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
-                                    false);
-
-  web_graphics_context->deleteTexture(src_texture);
-  web_graphics_context->flush();
-
-  SyncPointClientImpl client(web_graphics_context);
-  video_frame->UpdateReleaseSyncPoint(&client);
+  // TODO(dshwang): need more elegant way to convert WebGraphicsContext3D to
+  // GLES2Interface.
+  gpu::gles2::GLES2Interface* gl =
+      static_cast<webkit::gpu::WebGraphicsContext3DImpl*>(web_graphics_context)
+          ->GetGLInterface();
+  skcanvas_video_renderer_.CopyVideoFrameToTexture(gl,
+                                                   video_frame.get(),
+                                                   texture,
+                                                   level,
+                                                   internal_format,
+                                                   type,
+                                                   premultiply_alpha,
+                                                   flip_y);
   return true;
 }