Add support for converting I420 software frames into NV12 hardware frames

content/common/gpu/gpu_memory_buffer_factory_io_surface.cc

 // Copyright 2014 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 "content/common/gpu/gpu_memory_buffer_factory_io_surface.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 
 #include <vector>
 
@@ skipping 14 matching lines @@
 }
 
 int32 BytesPerElement(gfx::BufferFormat format, int plane) {
   switch (format) {
     case gfx::BufferFormat::R_8:
       DCHECK_EQ(plane, 0);
       return 1;
     case gfx::BufferFormat::BGRA_8888:
       DCHECK_EQ(plane, 0);
       return 4;
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      static int32 bytes_per_element[] = {1, 2};
+      DCHECK_LT(static_cast<size_t>(plane), arraysize(bytes_per_element));
+      return bytes_per_element[plane];
     case gfx::BufferFormat::UYVY_422:
       DCHECK_EQ(plane, 0);
       return 2;
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::YUV_420:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 int32 PixelFormat(gfx::BufferFormat format) {
   switch (format) {
     case gfx::BufferFormat::R_8:
       return 'L008';
     case gfx::BufferFormat::BGRA_8888:
       return 'BGRA';
+    case gfx::BufferFormat::YUV_420_BIPLANAR:
+      return '420v';
     case gfx::BufferFormat::UYVY_422:
       return '2vuy';
     case gfx::BufferFormat::ATC:
     case gfx::BufferFormat::ATCIA:
     case gfx::BufferFormat::DXT1:
     case gfx::BufferFormat::DXT5:
     case gfx::BufferFormat::ETC1:
     case gfx::BufferFormat::RGBA_4444:
     case gfx::BufferFormat::RGBA_8888:
     case gfx::BufferFormat::BGRX_8888:
     case gfx::BufferFormat::YUV_420:
       NOTREACHED();
       return 0;
   }
 
   NOTREACHED();
   return 0;
 }
 
 const GpuMemoryBufferFactory::Configuration kSupportedConfigurations[] = {
     {gfx::BufferFormat::BGRA_8888, gfx::BufferUsage::SCANOUT},
     {gfx::BufferFormat::R_8, gfx::BufferUsage::PERSISTENT_MAP},
     {gfx::BufferFormat::R_8, gfx::BufferUsage::MAP},
     {gfx::BufferFormat::BGRA_8888, gfx::BufferUsage::PERSISTENT_MAP},
     {gfx::BufferFormat::BGRA_8888, gfx::BufferUsage::MAP},
     {gfx::BufferFormat::UYVY_422, gfx::BufferUsage::MAP},
     {gfx::BufferFormat::UYVY_422, gfx::BufferUsage::PERSISTENT_MAP},
+    {gfx::BufferFormat::YUV_420_BIPLANAR, gfx::BufferUsage::MAP},
+    {gfx::BufferFormat::YUV_420_BIPLANAR, gfx::BufferUsage::PERSISTENT_MAP},
 };
 
 }  // namespace
 
 GpuMemoryBufferFactoryIOSurface::GpuMemoryBufferFactoryIOSurface() {
 }
 
 GpuMemoryBufferFactoryIOSurface::~GpuMemoryBufferFactoryIOSurface() {
 }
 
@@ skipping 110 matching lines @@
 
   scoped_refptr<gfx::GLImageIOSurface> image(
       new gfx::GLImageIOSurface(handle.id, size, internalformat));
   if (!image->Initialize(it->second.get(), format))
     return scoped_refptr<gfx::GLImage>();
 
   return image;
 }
 
 }  // namespace content