Enable sampling from DXGI NV12 formats in GLRenderer.

cc/layers/video_layer_impl.cc

 // Copyright 2011 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 "cc/layers/video_layer_impl.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 214 matching lines @@
                            uv_top_left,
                            uv_bottom_right,
                            SK_ColorTRANSPARENT,
                            opacity,
                            flipped,
                            nearest_neighbor);
       ValidateQuadResources(texture_quad);
       break;
     }
     case VideoFrameExternalResources::YUV_RESOURCE: {
-      DCHECK_GE(frame_resources_.size(), 3u);
-
       YUVVideoDrawQuad::ColorSpace color_space = YUVVideoDrawQuad::REC_601;
       int videoframe_color_space;
       if (frame_->metadata()->GetInteger(media::VideoFrameMetadata::COLOR_SPACE,
                                          &videoframe_color_space)) {
         if (videoframe_color_space == media::COLOR_SPACE_JPEG) {
           color_space = YUVVideoDrawQuad::JPEG;
         } else if (videoframe_color_space == media::COLOR_SPACE_HD_REC709) {
           color_space = YUVVideoDrawQuad::REC_709;
         }
       }
 
       const gfx::Size ya_tex_size = coded_size;
       gfx::Size uv_tex_size = media::VideoFrame::PlaneSize(
           frame_->format(), media::VideoFrame::kUPlane, coded_size);
 
       if (frame_->HasTextures()) {
-        DCHECK_EQ(media::PIXEL_FORMAT_I420, frame_->format());
-        DCHECK_EQ(3u, frame_resources_.size());  // Alpha is not supported yet.
+        if (frame_->format() == media::PIXEL_FORMAT_NV12) {
+          DCHECK_EQ(2u, frame_resources_.size());
+        } else {
+          DCHECK_EQ(media::PIXEL_FORMAT_I420, frame_->format());
+          DCHECK_EQ(3u,
+                    frame_resources_.size());  // Alpha is not supported yet.
+        }
       } else {
         DCHECK(uv_tex_size ==
                media::VideoFrame::PlaneSize(
                    frame_->format(), media::VideoFrame::kVPlane, coded_size));
+        DCHECK_GE(frame_resources_.size(), 3u);
         DCHECK(frame_resources_.size() <= 3 ||
                ya_tex_size == media::VideoFrame::PlaneSize(
                                   frame_->format(), media::VideoFrame::kAPlane,
                                   coded_size));
       }
 
       // Compute the UV sub-sampling factor based on the ratio between
       // |ya_tex_size| and |uv_tex_size|.
       float uv_subsampling_factor_x =
           static_cast<float>(ya_tex_size.width()) / uv_tex_size.width();
       float uv_subsampling_factor_y =
           static_cast<float>(ya_tex_size.height()) / uv_tex_size.height();
       gfx::RectF ya_tex_coord_rect(visible_sample_rect);
       gfx::RectF uv_tex_coord_rect(
           visible_sample_rect.x() / uv_subsampling_factor_x,
           visible_sample_rect.y() / uv_subsampling_factor_y,
           visible_sample_rect.width() / uv_subsampling_factor_x,
           visible_sample_rect.height() / uv_subsampling_factor_y);
 
       YUVVideoDrawQuad* yuv_video_quad =
           render_pass->CreateAndAppendDrawQuad<YUVVideoDrawQuad>();
       yuv_video_quad->SetNew(
           shared_quad_state, quad_rect, opaque_rect, visible_quad_rect,
           ya_tex_coord_rect, uv_tex_coord_rect, ya_tex_size, uv_tex_size,
           frame_resources_[0].id, frame_resources_[1].id,
-          frame_resources_[2].id,
+          frame_resources_.size() > 2 ? frame_resources_[2].id
+                                      : frame_resources_[1].id,
           frame_resources_.size() > 3 ? frame_resources_[3].id : 0, color_space,
           frame_resource_offset_, frame_resource_multiplier_);
       ValidateQuadResources(yuv_video_quad);
       break;
     }
     case VideoFrameExternalResources::RGBA_RESOURCE:
     case VideoFrameExternalResources::RGBA_PREMULTIPLIED_RESOURCE:
     case VideoFrameExternalResources::RGB_RESOURCE: {
       DCHECK_EQ(frame_resources_.size(), 1u);
       if (frame_resources_.size() < 1u)
@@ skipping 116 matching lines @@
 void VideoLayerImpl::SetNeedsRedraw() {
   SetUpdateRect(gfx::UnionRects(update_rect(), gfx::Rect(bounds())));
   layer_tree_impl()->SetNeedsRedraw();
 }
 
 const char* VideoLayerImpl::LayerTypeAsString() const {
   return "cc::VideoLayerImpl";
 }
 
 }  // namespace cc