Moved SkCanvasVideoRenderer to media/filters.

webkit/media/skcanvas_video_renderer.cc

Index: webkit/media/skcanvas_video_renderer.cc
diff --git a/webkit/media/skcanvas_video_renderer.cc b/webkit/media/skcanvas_video_renderer.cc
deleted file mode 100644
index c2231b2d5fcb7982abf64da57fe36d5fef24ee15..0000000000000000000000000000000000000000
--- a/webkit/media/skcanvas_video_renderer.cc
+++ /dev/null
@@ -1,260 +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 "webkit/media/skcanvas_video_renderer.h"
-
-#include "base/logging.h"
-#include "media/base/video_frame.h"
-#include "media/base/yuv_convert.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkDevice.h"
-
-namespace webkit_media {
-
-static bool IsEitherYV12OrYV16(media::VideoFrame::Format format) {
-  return format == media::VideoFrame::YV12 || format == media::VideoFrame::YV16;
-}
-
-static bool IsEitherYV12OrYV16OrNative(media::VideoFrame::Format format) {
-  return IsEitherYV12OrYV16(format) ||
-      format == media::VideoFrame::NATIVE_TEXTURE;
-}
-
-// CanFastPaint is a helper method to determine the conditions for fast
-// painting. The conditions are:
-// 1. No skew in canvas matrix.
-// 2. No flipping nor mirroring.
-// 3. Canvas has pixel format ARGB8888.
-// 4. Canvas is opaque.
-// 5. Frame format is YV12 or YV16.
-//
-// TODO(hclam): The fast paint method should support flipping and mirroring.
-// Disable the flipping and mirroring checks once we have it.
-static bool CanFastPaint(SkCanvas* canvas, const gfx::Rect& dest_rect,
-                         uint8_t alpha, media::VideoFrame::Format format) {
-  if (alpha != 0xFF || !IsEitherYV12OrYV16(format))
-    return false;
-
-  const SkMatrix& total_matrix = canvas->getTotalMatrix();
-  // Perform the following checks here:
-  // 1. Check for skewing factors of the transformation matrix. They should be
-  //    zero.
-  // 2. Check for mirroring and flipping. Make sure they are greater than zero.
-  if (SkScalarNearlyZero(total_matrix.getSkewX()) &&
-      SkScalarNearlyZero(total_matrix.getSkewY()) &&
-      total_matrix.getScaleX() > 0 &&
-      total_matrix.getScaleY() > 0) {
-    SkDevice* device = canvas->getDevice();
-    const SkBitmap::Config config = device->config();
-
-    if (config == SkBitmap::kARGB_8888_Config && device->isOpaque()) {
-      return true;
-    }
-  }
-
-  return false;
-}
-
-// Fast paint does YUV => RGB, scaling, blitting all in one step into the
-// canvas. It's not always safe and appropriate to perform fast paint.
-// CanFastPaint() is used to determine the conditions.
-static void FastPaint(
-    const scoped_refptr<media::VideoFrame>& video_frame,
-    SkCanvas* canvas,
-    const gfx::Rect& dest_rect) {
-  DCHECK(IsEitherYV12OrYV16(video_frame->format())) << video_frame->format();
-  DCHECK_EQ(video_frame->stride(media::VideoFrame::kUPlane),
-            video_frame->stride(media::VideoFrame::kVPlane));
-
-  const SkBitmap& bitmap = canvas->getDevice()->accessBitmap(true);
-  media::YUVType yuv_type = (video_frame->format() == media::VideoFrame::YV12) ?
-                            media::YV12 : media::YV16;
-  int y_shift = yuv_type;  // 1 for YV12, 0 for YV16.
-
-  // Create a rectangle backed by SkScalar.
-  SkRect scalar_dest_rect;
-  scalar_dest_rect.iset(dest_rect.x(), dest_rect.y(),
-                        dest_rect.right(), dest_rect.bottom());
-
-  // Transform the destination rectangle to local coordinates.
-  const SkMatrix& local_matrix = canvas->getTotalMatrix();
-  SkRect local_dest_rect;
-  local_matrix.mapRect(&local_dest_rect, scalar_dest_rect);
-
-  // After projecting the destination rectangle to local coordinates, round
-  // the projected rectangle to integer values, this will give us pixel values
-  // of the rectangle.
-  SkIRect local_dest_irect, local_dest_irect_saved;
-  local_dest_rect.round(&local_dest_irect);
-  local_dest_rect.round(&local_dest_irect_saved);
-
-  // No point painting if the destination rect doesn't intersect with the
-  // clip rect.
-  if (!local_dest_irect.intersect(canvas->getTotalClip().getBounds()))
-    return;
-
-  // At this point |local_dest_irect| contains the rect that we should draw
-  // to within the clipping rect.
-
-  // Calculate the address for the top left corner of destination rect in
-  // the canvas that we will draw to. The address is obtained by the base
-  // address of the canvas shifted by "left" and "top" of the rect.
-  uint8* dest_rect_pointer = static_cast<uint8*>(bitmap.getPixels()) +
-      local_dest_irect.fTop * bitmap.rowBytes() +
-      local_dest_irect.fLeft * 4;
-
-  // Project the clip rect to the original video frame, obtains the
-  // dimensions of the projected clip rect, "left" and "top" of the rect.
-  // The math here are all integer math so we won't have rounding error and
-  // write outside of the canvas.
-  // We have the assumptions of dest_rect.width() and dest_rect.height()
-  // being non-zero, these are valid assumptions since finding intersection
-  // above rejects empty rectangle so we just do a DCHECK here.
-  DCHECK_NE(0, dest_rect.width());
-  DCHECK_NE(0, dest_rect.height());
-  size_t frame_clip_width = local_dest_irect.width() *
-      video_frame->data_size().width() / local_dest_irect_saved.width();
-  size_t frame_clip_height = local_dest_irect.height() *
-      video_frame->data_size().height() / local_dest_irect_saved.height();
-
-  // Project the "left" and "top" of the final destination rect to local
-  // coordinates of the video frame, use these values to find the offsets
-  // in the video frame to start reading.
-  size_t frame_clip_left =
-      (local_dest_irect.fLeft - local_dest_irect_saved.fLeft) *
-      video_frame->data_size().width() / local_dest_irect_saved.width();
-  size_t frame_clip_top =
-      (local_dest_irect.fTop - local_dest_irect_saved.fTop) *
-      video_frame->data_size().height() / local_dest_irect_saved.height();
-
-  // Use the "left" and "top" of the destination rect to locate the offset
-  // in Y, U and V planes.
-  size_t y_offset = video_frame->stride(media::VideoFrame::kYPlane) *
-      frame_clip_top + frame_clip_left;
-
-  // For format YV12, there is one U, V value per 2x2 block.
-  // For format YV16, there is one u, V value per 2x1 block.
-  size_t uv_offset = (video_frame->stride(media::VideoFrame::kUPlane) *
-                      (frame_clip_top >> y_shift)) + (frame_clip_left >> 1);
-  uint8* frame_clip_y =
-      video_frame->data(media::VideoFrame::kYPlane) + y_offset;
-  uint8* frame_clip_u =
-      video_frame->data(media::VideoFrame::kUPlane) + uv_offset;
-  uint8* frame_clip_v =
-      video_frame->data(media::VideoFrame::kVPlane) + uv_offset;
-
-  // TODO(hclam): do rotation and mirroring here.
-  // TODO(fbarchard): switch filtering based on performance.
-  bitmap.lockPixels();
-  media::ScaleYUVToRGB32(frame_clip_y,
-                         frame_clip_u,
-                         frame_clip_v,
-                         dest_rect_pointer,
-                         frame_clip_width,
-                         frame_clip_height,
-                         local_dest_irect.width(),
-                         local_dest_irect.height(),
-                         video_frame->stride(media::VideoFrame::kYPlane),
-                         video_frame->stride(media::VideoFrame::kUPlane),
-                         bitmap.rowBytes(),
-                         yuv_type,
-                         media::ROTATE_0,
-                         media::FILTER_BILINEAR);
-  bitmap.unlockPixels();
-}
-
-// 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(IsEitherYV12OrYV16OrNative(video_frame->format()))
-      << video_frame->format();
-  if (IsEitherYV12OrYV16(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->data_size().width() ||
-      bitmap->height() != video_frame->data_size().height()) {
-    bitmap->setConfig(SkBitmap::kARGB_8888_Config,
-                      video_frame->data_size().width(),
-                      video_frame->data_size().height());
-    bitmap->allocPixels();
-    bitmap->setIsVolatile(true);
-  }
-
-  bitmap->lockPixels();
-  if (IsEitherYV12OrYV16(video_frame->format())) {
-    media::YUVType yuv_type =
-        (video_frame->format() == media::VideoFrame::YV12) ?
-        media::YV12 : media::YV16;
-    media::ConvertYUVToRGB32(video_frame->data(media::VideoFrame::kYPlane),
-                             video_frame->data(media::VideoFrame::kUPlane),
-                             video_frame->data(media::VideoFrame::kVPlane),
-                             static_cast<uint8*>(bitmap->getPixels()),
-                             video_frame->data_size().width(),
-                             video_frame->data_size().height(),
-                             video_frame->stride(media::VideoFrame::kYPlane),
-                             video_frame->stride(media::VideoFrame::kUPlane),
-                             bitmap->rowBytes(),
-                             yuv_type);
-  } else {
-    DCHECK_EQ(video_frame->format(), media::VideoFrame::NATIVE_TEXTURE);
-    video_frame->ReadPixelsFromNativeTexture(bitmap->getPixels());
-  }
-  bitmap->notifyPixelsChanged();
-  bitmap->unlockPixels();
-}
-
-SkCanvasVideoRenderer::SkCanvasVideoRenderer()
-    : last_frame_timestamp_(media::kNoTimestamp()) {
-}
-
-SkCanvasVideoRenderer::~SkCanvasVideoRenderer() {}
-
-void SkCanvasVideoRenderer::Paint(media::VideoFrame* video_frame,
-                                  SkCanvas* canvas,
-                                  const gfx::Rect& dest_rect,
-                                  uint8_t alpha) {
-  if (alpha == 0) {
-    return;
-  }
-
-  SkRect dest;
-  dest.set(SkIntToScalar(dest_rect.x()), SkIntToScalar(dest_rect.y()),
-           SkIntToScalar(dest_rect.right()), SkIntToScalar(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 || !IsEitherYV12OrYV16OrNative(video_frame->format())) {
-    canvas->drawRect(dest, paint);
-    return;
-  }
-
-  // Scale and convert to RGB in one step if we can.
-  if (CanFastPaint(canvas, dest_rect, alpha, video_frame->format())) {
-    FastPaint(video_frame, canvas, dest_rect);
-    return;
-  }
-
-  // Check if we should convert and update |last_frame_|.
-  if (last_frame_.isNull() ||
-      video_frame->GetTimestamp() != last_frame_timestamp_) {
-    ConvertVideoFrameToBitmap(video_frame, &last_frame_);
-    last_frame_timestamp_ = video_frame->GetTimestamp();
-  }
-
-  // Do a slower paint using |last_frame_|.
-  paint.setFilterBitmap(true);
-  canvas->drawBitmapRect(last_frame_, NULL, dest, &paint);
-}
-
-}  // namespace webkit_media