Refactor: Extract gpu_video_encode_accelerator_factory.

media/gpu/gpu_video_encode_accelerator_factory.cc

+// Copyright 2017 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/gpu/gpu_video_encode_accelerator_factory.h"
+
+#include "base/memory/ptr_util.h"
+#include "media/gpu/gpu_video_accelerator_util.h"
+
+#if defined(OS_CHROMEOS)
+#if defined(USE_V4L2_CODEC)
+#include "media/gpu/v4l2_video_encode_accelerator.h"
+#endif
+#if defined(ARCH_CPU_X86_FAMILY)
+#include "media/gpu/vaapi_video_encode_accelerator.h"
+#endif
+#elif defined(OS_ANDROID) && BUILDFLAG(ENABLE_WEBRTC)
+#include "media/gpu/android_video_encode_accelerator.h"
+#elif defined(OS_MACOSX)
+#include "media/gpu/vt_video_encode_accelerator_mac.h"
+#elif defined(OS_WIN)
+#include "base/feature_list.h"
+#include "media/base/media_switches.h"
+#include "media/gpu/media_foundation_video_encode_accelerator_win.h"
+#endif
+
+namespace media {
+
+namespace {
+#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+std::unique_ptr<VideoEncodeAccelerator> CreateV4L2VEA() {
+  scoped_refptr<V4L2Device> device = V4L2Device::Create();

[Pawel Osciak, 2017/05/15 01:28:51]

perhaps auto?

[Owen Lin, 2017/05/16 07:35:04]

Done.

+  if (device)
+    return base::WrapUnique<VideoEncodeAccelerator>(
+        new V4L2VideoEncodeAccelerator(device));
+  return nullptr;
+}
+#endif
+
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
+std::unique_ptr<VideoEncodeAccelerator> CreateVaapiVEA() {
+  return base::WrapUnique<VideoEncodeAccelerator>(
+      new VaapiVideoEncodeAccelerator());
+}
+#endif
+
+#if defined(OS_ANDROID) && BUILDFLAG(ENABLE_WEBRTC)
+std::unique_ptr<VideoEncodeAccelerator> CreateAndroidVEA() {
+  return base::WrapUnique<VideoEncodeAccelerator>(
+      new AndroidVideoEncodeAccelerator());
+}
+#endif
+
+#if defined(OS_MACOSX)
+std::unique_ptr<VideoEncodeAccelerator> CreateVTVEA() {
+  return base::WrapUnique<VideoEncodeAccelerator>(
+      new VTVideoEncodeAccelerator());
+}
+#endif
+
+#if defined(OS_WIN)
+std::unique_ptr<VideoEncodeAccelerator> CreateMFVEA() {
+  return base::WrapUnique<VideoEncodeAccelerator>(
+      new MediaFoundationVideoEncodeAccelerator());
+}
+#endif
+
+using VEAFactoryFunction = std::unique_ptr<VideoEncodeAccelerator> (*)();
+
+std::vector<VEAFactoryFunction> GetVEAFactoryFunctions(
+    const gpu::GpuPreferences& gpu_preferences) {
+  // Array of Create..VEA() function pointers, potentially usable on current
+  // platform. This list is ordered by priority, from most to least preferred,
+  // if applicable.
+  std::vector<VEAFactoryFunction> vea_factory_functions;
+#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+  vea_factory_functions.push_back(&CreateV4L2VEA);
+#endif
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_X86_FAMILY)
+  if (!gpu_preferences.disable_vaapi_accelerated_video_encode)
+    vea_factory_functions.push_back(&CreateVaapiVEA);
+#endif
+#if defined(OS_ANDROID) && BUILDFLAG(ENABLE_WEBRTC)
+  if (!gpu_preferences.disable_web_rtc_hw_encoding)
+    vea_factory_functions.push_back(&CreateAndroidVEA);
+#endif
+#if defined(OS_MACOSX)
+  vea_factory_functions.push_back(&CreateVTVEA);
+#endif
+#if defined(OS_WIN)
+  if (base::FeatureList::IsEnabled(kMediaFoundationH264Encoding))
+    vea_factory_functions.push_back(&CreateMediaFoundationVEA);
+#endif
+  return vea_factory_functions;
+}
+
+}  // anonymous namespace
+
+MEDIA_GPU_EXPORT std::unique_ptr<VideoEncodeAccelerator>
+GpuVideoEncodeAcceleratorFactory::CreateVEA(
+    VideoPixelFormat input_format,
+    const gfx::Size& input_visible_size,
+    VideoCodecProfile output_profile,
+    uint32_t initial_bitrate,
+    VideoEncodeAccelerator::Client* client,
+    const gpu::GpuPreferences& gpu_preferences) {
+  for (const auto& create_vea : GetVEAFactoryFunctions(gpu_preferences)) {
+    auto vea = create_vea();
+    if (vea && vea->Initialize(input_format, input_visible_size, output_profile,
+                               initial_bitrate, client))
+      return vea;
+  }
+  return nullptr;
+}
+
+MEDIA_GPU_EXPORT VideoEncodeAccelerator::SupportedProfiles
+GpuVideoEncodeAcceleratorFactory::GetSupportedProfiles(
+    const gpu::GpuPreferences& gpu_preferences) {
+  VideoEncodeAccelerator::SupportedProfiles profiles;
+  for (const auto& create_vea : GetVEAFactoryFunctions(gpu_preferences)) {
+    auto vea = create_vea();
+    if (vea)
+      GpuVideoAcceleratorUtil::InsertUniqueEncodeProfiles(
+          vea->GetSupportedProfiles(), &profiles);
+  }
+  return profiles;
+}
+
+}  // namespace media