<video> decode in hardware!

content/renderer/renderer_gpu_video_decoder_factories.cc

+// Copyright (c) 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 "content/renderer/renderer_gpu_video_decoder_factories.h"
+
+#include "content/common/child_thread.h"
+#include "content/renderer/gpu/command_buffer_proxy.h"
+#include "content/renderer/gpu/gpu_channel_host.h"
+#include "content/renderer/gpu/renderer_gl_context.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+
+RendererGpuVideoDecoderFactories::~RendererGpuVideoDecoderFactories() {}
+RendererGpuVideoDecoderFactories::RendererGpuVideoDecoderFactories(
+    GpuChannelHost* gpu_channel_host, base::WeakPtr<RendererGLContext> context)
+    : gpu_channel_host_(gpu_channel_host),
+      context_(context) {
+}
+
+media::VideoDecodeAccelerator*
+RendererGpuVideoDecoderFactories::CreateVideoDecodeAccelerator(
+    media::VideoDecodeAccelerator::Profile profile,
+    media::VideoDecodeAccelerator::Client* client) {
+  if (!context_)
+    return NULL;
+  return gpu_channel_host_->CreateVideoDecoder(
+      context_->GetCommandBufferProxy()->route_id(), profile, client);
+}
+
+bool RendererGpuVideoDecoderFactories::CreateTextures(
+    int32 count, const gfx::Size& size, std::vector<uint32>* texture_ids) {
+  if (!context_)
+    return false;
+  gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
+  texture_ids->resize(count);
+  gles2->GenTextures(count, &texture_ids->at(0));
+  for (int i = 0; i < count; ++i) {
+    gles2->ActiveTexture(GL_TEXTURE0);
+    uint32 texture_id = texture_ids->at(i);
+    gles2->BindTexture(GL_TEXTURE_2D, texture_id);
+    gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    gles2->TexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    gles2->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    gles2->TexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    gles2->TexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, size.width(), size.height(),
+                      0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+  }
+  DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
+  return true;
+}
+
+bool RendererGpuVideoDecoderFactories::DeleteTexture(uint32 texture_id) {
+  if (!context_)
+    return false;
+  gpu::gles2::GLES2Implementation* gles2 = context_->GetImplementation();
+  gles2->DeleteTextures(1, &texture_id);
+  DCHECK_EQ(gles2->GetError(), static_cast<GLenum>(GL_NO_ERROR));
+  return true;
+}
+
+base::SharedMemory* RendererGpuVideoDecoderFactories::CreateSharedMemory(
+    size_t size) {
+  return ChildThread::current()->AllocateSharedMemory(size);
+}