media: Optimize HW Video to 2D Canvas copy.

media/filters/skcanvas_video_renderer.cc

Index: media/filters/skcanvas_video_renderer.cc
diff --git a/media/filters/skcanvas_video_renderer.cc b/media/filters/skcanvas_video_renderer.cc
deleted file mode 100644
index 062e317b71da03476438e156bb2f5d2cedc47b00..0000000000000000000000000000000000000000
--- a/media/filters/skcanvas_video_renderer.cc
+++ /dev/null
@@ -1,225 +0,0 @@
-// 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 "media/filters/skcanvas_video_renderer.h"
-
-#include "base/logging.h"
-#include "media/base/video_frame.h"
-#include "media/base/yuv_convert.h"
-#include "third_party/libyuv/include/libyuv.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-
-// Skia internal format depends on a platform. On Android it is ABGR, on others
-// it is ARGB.
-#if SK_B32_SHIFT == 0 && SK_G32_SHIFT == 8 && SK_R32_SHIFT == 16 && \
-    SK_A32_SHIFT == 24
-#define LIBYUV_I420_TO_ARGB libyuv::I420ToARGB
-#define LIBYUV_I422_TO_ARGB libyuv::I422ToARGB
-#elif SK_R32_SHIFT == 0 && SK_G32_SHIFT == 8 && SK_B32_SHIFT == 16 && \
-    SK_A32_SHIFT == 24
-#define LIBYUV_I420_TO_ARGB libyuv::I420ToABGR
-#define LIBYUV_I422_TO_ARGB libyuv::I422ToABGR
-#else
-#error Unexpected Skia ARGB_8888 layout!
-#endif
-
-namespace media {
-
-static bool IsYUV(media::VideoFrame::Format format) {
-  return format == media::VideoFrame::YV12 ||
-         format == media::VideoFrame::YV16 ||
-         format == media::VideoFrame::I420 ||
-         format == media::VideoFrame::YV12A ||
-         format == media::VideoFrame::YV12J ||
-         format == media::VideoFrame::YV24;
-}
-
-static bool IsYUVOrNative(media::VideoFrame::Format format) {
-  return IsYUV(format) || format == media::VideoFrame::NATIVE_TEXTURE;
-}
-
-// Converts a VideoFrame containing YUV data to a SkBitmap containing RGB data.
-//
-// |bitmap| will be (re)allocated to match the dimensions of |video_frame|.
-static void ConvertVideoFrameToBitmap(
-    const scoped_refptr<media::VideoFrame>& video_frame,
-    SkBitmap* bitmap) {
-  DCHECK(IsYUVOrNative(video_frame->format()))
-      << video_frame->format();
-  if (IsYUV(video_frame->format())) {
-    DCHECK_EQ(video_frame->stride(media::VideoFrame::kUPlane),
-              video_frame->stride(media::VideoFrame::kVPlane));
-  }
-
-  // Check if |bitmap| needs to be (re)allocated.
-  if (bitmap->isNull() ||
-      bitmap->width() != video_frame->visible_rect().width() ||
-      bitmap->height() != video_frame->visible_rect().height()) {
-    bitmap->allocN32Pixels(video_frame->visible_rect().width(),
-                           video_frame->visible_rect().height());
-    bitmap->setIsVolatile(true);
-  }
-
-  bitmap->lockPixels();
-
-  size_t y_offset = 0;
-  size_t uv_offset = 0;
-  if (IsYUV(video_frame->format())) {
-    int y_shift = (video_frame->format() == media::VideoFrame::YV16) ? 0 : 1;
-    // Use the "left" and "top" of the destination rect to locate the offset
-    // in Y, U and V planes.
-    y_offset = (video_frame->stride(media::VideoFrame::kYPlane) *
-                video_frame->visible_rect().y()) +
-                video_frame->visible_rect().x();
-    // For format YV12, there is one U, V value per 2x2 block.
-    // For format YV16, there is one U, V value per 2x1 block.
-    uv_offset = (video_frame->stride(media::VideoFrame::kUPlane) *
-                (video_frame->visible_rect().y() >> y_shift)) +
-                (video_frame->visible_rect().x() >> 1);
-  }
-
-  switch (video_frame->format()) {
-    case media::VideoFrame::YV12:
-    case media::VideoFrame::I420:
-      LIBYUV_I420_TO_ARGB(
-          video_frame->data(media::VideoFrame::kYPlane) + y_offset,
-          video_frame->stride(media::VideoFrame::kYPlane),
-          video_frame->data(media::VideoFrame::kUPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kUPlane),
-          video_frame->data(media::VideoFrame::kVPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kVPlane),
-          static_cast<uint8*>(bitmap->getPixels()),
-          bitmap->rowBytes(),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height());
-      break;
-
-    case media::VideoFrame::YV12J:
-      media::ConvertYUVToRGB32(
-          video_frame->data(media::VideoFrame::kYPlane) + y_offset,
-          video_frame->data(media::VideoFrame::kUPlane) + uv_offset,
-          video_frame->data(media::VideoFrame::kVPlane) + uv_offset,
-          static_cast<uint8*>(bitmap->getPixels()),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height(),
-          video_frame->stride(media::VideoFrame::kYPlane),
-          video_frame->stride(media::VideoFrame::kUPlane),
-          bitmap->rowBytes(),
-          media::YV12J);
-      break;
-
-    case media::VideoFrame::YV16:
-      LIBYUV_I422_TO_ARGB(
-          video_frame->data(media::VideoFrame::kYPlane) + y_offset,
-          video_frame->stride(media::VideoFrame::kYPlane),
-          video_frame->data(media::VideoFrame::kUPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kUPlane),
-          video_frame->data(media::VideoFrame::kVPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kVPlane),
-          static_cast<uint8*>(bitmap->getPixels()),
-          bitmap->rowBytes(),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height());
-      break;
-
-    case media::VideoFrame::YV12A:
-      // Since libyuv doesn't support YUVA, fallback to media, which is not ARM
-      // optimized.
-      // TODO(fbarchard, mtomasz): Use libyuv, then copy the alpha channel.
-      media::ConvertYUVAToARGB(
-          video_frame->data(media::VideoFrame::kYPlane) + y_offset,
-          video_frame->data(media::VideoFrame::kUPlane) + uv_offset,
-          video_frame->data(media::VideoFrame::kVPlane) + uv_offset,
-          video_frame->data(media::VideoFrame::kAPlane),
-          static_cast<uint8*>(bitmap->getPixels()),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height(),
-          video_frame->stride(media::VideoFrame::kYPlane),
-          video_frame->stride(media::VideoFrame::kUPlane),
-          video_frame->stride(media::VideoFrame::kAPlane),
-          bitmap->rowBytes(),
-          media::YV12);
-      break;
-
-    case media::VideoFrame::YV24:
-      libyuv::I444ToARGB(
-          video_frame->data(media::VideoFrame::kYPlane) + y_offset,
-          video_frame->stride(media::VideoFrame::kYPlane),
-          video_frame->data(media::VideoFrame::kUPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kUPlane),
-          video_frame->data(media::VideoFrame::kVPlane) + uv_offset,
-          video_frame->stride(media::VideoFrame::kVPlane),
-          static_cast<uint8*>(bitmap->getPixels()),
-          bitmap->rowBytes(),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height());
-#if SK_R32_SHIFT == 0 && SK_G32_SHIFT == 8 && SK_B32_SHIFT == 16 && \
-    SK_A32_SHIFT == 24
-      libyuv::ARGBToABGR(
-          static_cast<uint8*>(bitmap->getPixels()),
-          bitmap->rowBytes(),
-          static_cast<uint8*>(bitmap->getPixels()),
-          bitmap->rowBytes(),
-          video_frame->visible_rect().width(),
-          video_frame->visible_rect().height());
-#endif
-      break;
-
-    case media::VideoFrame::NATIVE_TEXTURE:
-      DCHECK_EQ(video_frame->format(), media::VideoFrame::NATIVE_TEXTURE);
-      video_frame->ReadPixelsFromNativeTexture(*bitmap);
-      break;
-
-    default:
-      NOTREACHED();
-      break;
-  }
-  bitmap->notifyPixelsChanged();
-  bitmap->unlockPixels();
-}
-
-SkCanvasVideoRenderer::SkCanvasVideoRenderer()
-    : last_frame_timestamp_(media::kNoTimestamp()) {
-}
-
-SkCanvasVideoRenderer::~SkCanvasVideoRenderer() {}
-
-void SkCanvasVideoRenderer::Paint(media::VideoFrame* video_frame,
-                                  SkCanvas* canvas,
-                                  const gfx::RectF& dest_rect,
-                                  uint8 alpha) {
-  if (alpha == 0) {
-    return;
-  }
-
-  SkRect dest;
-  dest.set(dest_rect.x(), dest_rect.y(), dest_rect.right(), dest_rect.bottom());
-
-  SkPaint paint;
-  paint.setAlpha(alpha);
-
-  // Paint black rectangle if there isn't a frame available or the
-  // frame has an unexpected format.
-  if (!video_frame || !IsYUVOrNative(video_frame->format())) {
-    canvas->drawRect(dest, paint);
-    return;
-  }
-
-  // Check if we should convert and update |last_frame_|.
-  if (last_frame_.isNull() ||
-      video_frame->timestamp() != last_frame_timestamp_) {
-    ConvertVideoFrameToBitmap(video_frame, &last_frame_);
-    last_frame_timestamp_ = video_frame->timestamp();
-  }
-
-  // Use SRC mode so we completely overwrite the buffer (in case we have alpha)
-  // this means we don't need the extra cost of clearing the buffer first.
-  paint.setXfermode(SkXfermode::Create(SkXfermode::kSrc_Mode));
-
-  // Paint using |last_frame_|.
-  paint.setFilterLevel(SkPaint::kLow_FilterLevel);
-  canvas->drawBitmapRect(last_frame_, NULL, dest, &paint);
-}
-
-}  // namespace media