Revert of Clean up V4L2 codec-related flags and defines (patchset #3 id:40001...

Revert of Clean up V4L2 codec-related flags and defines (patchset #3 id:40001 of https://codereview.chromium.org/828063009/)

Reason for revert:
x86 Chrome compile failure due to https://code.google.com/p/chromium/issues/detail?id=455545.

Original issue's description:
> Clean up V4L2 codec-related flags and defines
>
> All arm platforms support V4L2 SVDA by default and use_v4l2_codec also governs V4L2 VDA/VEA now.
> Generates libv4l2 stub in GN file.
>
> BUG=449883
> TEST=build chrome and vda unittest on peach_pit, veyron_pinky, squawks,
> and panther_freon
>
> Committed: https://crrev.com/d5eeecc577f274bb8ed9d1954f263d83b5f00050
> Cr-Commit-Position: refs/heads/master@{#314536}

TBR=piman@chromium.org,wuchengli@chromium.org,henryhsu@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=449883

Review URL: https://codereview.chromium.org/902773003

Cr-Commit-Position: refs/heads/master@{#314760}

content/common/BUILD.gn

@@ -49,42 +49,6 @@ if (is_chromeos && cpu_arch != "arm") {
   }
 }
 
-if (is_chromeos && use_v4lplugin) {
-  action("libv4l2_generate_stubs") {
-    extra_header = "gpu/media/v4l2_stub_header.fragment"
-
-    script = "../../tools/generate_stubs/generate_stubs.py"
-    sources = [
-      "gpu/media/v4l2.sig",
-    ]
-    inputs = [
-      extra_header,
-    ]
-    stubs_filename_root = "v4l2_stubs"
-
-    outputs = [
-      "$target_gen_dir/gpu/media/$stubs_filename_root.cc",
-      "$target_gen_dir/gpu/media/$stubs_filename_root.h",
-    ]
-    args = [
-      "-i",
-      rebase_path("$target_gen_dir/gpu/media", root_build_dir),
-      "-o",
-      rebase_path("$target_gen_dir/gpu/media", root_build_dir),
-      "-t",
-      "posix_stubs",
-      "-e",
-      rebase_path(extra_header, root_build_dir),
-      "-s",
-      stubs_filename_root,
-      "-p",
-      "content/common/gpu/media",
-    ]
-
-    args += rebase_path(sources, root_build_dir)
-  }
-}
-
 if (is_mac) {
   action("libvt_generate_stubs") {
     extra_header = "gpu/media/vt_stubs_header.fragment"
@@ -316,46 +280,32 @@ source_set("common") {
   }
 
   if (is_chromeos) {
-    if (use_v4lplugin) {
-      defines += [ "USE_LIBV4L2" ]
-      sources += get_target_outputs(":libv4l2_generate_stubs")
-      deps += [ ":libv4l2_generate_stubs" ]
-    }
     if (use_v4l2_codec) {
       defines += [ "USE_V4L2_CODEC" ]
+    }
+    if (cpu_arch == "arm" || (use_ozone && use_v4l2_codec)) {
       sources += [
-        "gpu/media/accelerated_video_decoder.h",
         "gpu/media/generic_v4l2_video_device.cc",
         "gpu/media/generic_v4l2_video_device.h",
-        "gpu/media/h264_decoder.cc",
-        "gpu/media/h264_decoder.h",
-        "gpu/media/h264_dpb.cc",
-        "gpu/media/h264_dpb.h",
         "gpu/media/v4l2_image_processor.cc",
         "gpu/media/v4l2_image_processor.h",
-        "gpu/media/v4l2_slice_video_decode_accelerator.cc",
-        "gpu/media/v4l2_slice_video_decode_accelerator.h",
         "gpu/media/v4l2_video_decode_accelerator.cc",
         "gpu/media/v4l2_video_decode_accelerator.h",
         "gpu/media/v4l2_video_device.cc",
         "gpu/media/v4l2_video_device.h",
         "gpu/media/v4l2_video_encode_accelerator.cc",
         "gpu/media/v4l2_video_encode_accelerator.h",
-        "gpu/media/vp8_decoder.cc",
-        "gpu/media/vp8_decoder.h",
-        "gpu/media/vp8_picture.cc",
-        "gpu/media/vp8_picture.h",
       ]
       libs = [
         "EGL",
         "GLESv2",
       ]
-    }
-    if (cpu_arch == "arm") {
-      sources += [
-        "gpu/media/tegra_v4l2_video_device.cc",
-        "gpu/media/tegra_v4l2_video_device.h",
-      ]
+      if (cpu_arch == "arm") {
+        sources += [
+          "gpu/media/tegra_v4l2_video_device.cc",
+          "gpu/media/tegra_v4l2_video_device.h",
+        ]
+      }
     }
     if (cpu_arch != "arm") {
       sources += [

content/common/common.gni

@@ -13,10 +13,9 @@ content_common_gypi_values =
                 [ "../content_common.gypi" ])
 
 declare_args() {
-  # Indicates if V4L plugin is used.
-  use_v4lplugin = false
-
-  # Indicates if Video4Linux2 codec is used. This is used for all CrOS
-  # platforms which have v4l2 hardware encoder / decoder.
+  # TODO(henryhsu): This flag should be removed after the linux header of
+  # trybot is updated.
+  # Indicates if Video4Linux2 codec is used. This is used for x86 CrOS
+  # platform which has v4l2 hardware encoder / decoder.
   use_v4l2_codec = false
 }

content/common/gpu/media/gpu_video_decode_accelerator.cc

@@ -31,15 +31,18 @@
 #elif defined(OS_MACOSX)
 #include "content/common/gpu/media/vt_video_decode_accelerator.h"
 #elif defined(OS_CHROMEOS)
-#if defined(USE_V4L2_CODEC)
+#if defined(ARCH_CPU_ARMEL) && defined(USE_LIBV4L2)
 #include "content/common/gpu/media/v4l2_slice_video_decode_accelerator.h"
+#endif  // defined(ARCH_CPU_ARMEL)
+#if defined(ARCH_CPU_ARMEL) || (defined(USE_OZONE) && defined(USE_V4L2_CODEC))
 #include "content/common/gpu/media/v4l2_video_decode_accelerator.h"
 #include "content/common/gpu/media/v4l2_video_device.h"
+// defined(ARCH_CPU_ARMEL) || (defined(USE_OZONE) && defined(USE_V4L2_CODEC))
 #endif
 #if defined(ARCH_CPU_X86_FAMILY)
 #include "content/common/gpu/media/vaapi_video_decode_accelerator.h"
 #include "ui/gl/gl_implementation.h"
-#endif
+#endif  // defined(ARCH_CPU_X86_FAMILY)
 #elif defined(USE_OZONE)
 #include "media/ozone/media_ozone_platform.h"
 #elif defined(OS_ANDROID)
@@ -300,7 +303,8 @@ GpuVideoDecodeAccelerator::CreateDXVAVDA() {
 scoped_ptr<media::VideoDecodeAccelerator>
 GpuVideoDecodeAccelerator::CreateV4L2VDA() {
   scoped_ptr<media::VideoDecodeAccelerator> decoder;
-#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+#if defined(OS_CHROMEOS) && (defined(ARCH_CPU_ARMEL) || \
+    (defined(USE_OZONE) && defined(USE_V4L2_CODEC)))
   scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kDecoder);
   if (device.get()) {
     decoder.reset(new V4L2VideoDecodeAccelerator(
@@ -318,7 +322,7 @@ GpuVideoDecodeAccelerator::CreateV4L2VDA() {
 scoped_ptr<media::VideoDecodeAccelerator>
 GpuVideoDecodeAccelerator::CreateV4L2SliceVDA() {
   scoped_ptr<media::VideoDecodeAccelerator> decoder;
-#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_LIBV4L2)
   scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kDecoder);
   if (device.get()) {
     decoder.reset(new V4L2SliceVideoDecodeAccelerator(

content/common/gpu/media/gpu_video_encode_accelerator.cc

@@ -18,12 +18,13 @@
 #include "media/base/video_frame.h"
 
 #if defined(OS_CHROMEOS)
-#if defined(USE_V4L2_CODEC)
+#if defined(ARCH_CPU_ARMEL) || (defined(USE_OZONE) && defined(USE_V4L2_CODEC))
 #include "content/common/gpu/media/v4l2_video_encode_accelerator.h"
+// defined(ARCH_CPU_ARMEL) || (defined(USE_OZONE) && defined(USE_V4L2_CODEC))
 #endif
 #if defined(ARCH_CPU_X86_FAMILY)
 #include "content/common/gpu/media/vaapi_video_encode_accelerator.h"
-#endif
+#endif  // defined(ARCH_CPU_X86_FAMILY)
 #elif defined(OS_ANDROID) && defined(ENABLE_WEBRTC)
 #include "content/common/gpu/media/android_video_encode_accelerator.h"
 #endif
@@ -211,7 +212,8 @@ GpuVideoEncodeAccelerator::CreateVEAFps() {
 scoped_ptr<media::VideoEncodeAccelerator>
 GpuVideoEncodeAccelerator::CreateV4L2VEA() {
   scoped_ptr<media::VideoEncodeAccelerator> encoder;
-#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+#if defined(OS_CHROMEOS) && (defined(ARCH_CPU_ARMEL) || \
+    (defined(USE_OZONE) && defined(USE_V4L2_CODEC)))
   scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kEncoder);
   if (device)
     encoder.reset(new V4L2VideoEncodeAccelerator(device));

content/common/gpu/media/video_decode_accelerator_unittest.cc

@@ -59,8 +59,10 @@
 #include "base/win/windows_version.h"
 #include "content/common/gpu/media/dxva_video_decode_accelerator.h"
 #elif defined(OS_CHROMEOS)
-#if defined(USE_V4L2_CODEC)
+#if defined(ARCH_CPU_ARMEL) && defined(USE_LIBV4L2)
 #include "content/common/gpu/media/v4l2_slice_video_decode_accelerator.h"
+#endif  // defined(ARCH_CPU_ARMEL)
+#if defined(ARCH_CPU_ARMEL) || (defined(USE_OZONE) && defined(USE_V4L2_CODEC))
 #include "content/common/gpu/media/v4l2_video_decode_accelerator.h"
 #include "content/common/gpu/media/v4l2_video_device.h"
 #endif
@@ -503,7 +505,8 @@ GLRenderingVDAClient::CreateDXVAVDA() {
 scoped_ptr<media::VideoDecodeAccelerator>
 GLRenderingVDAClient::CreateV4L2VDA() {
   scoped_ptr<media::VideoDecodeAccelerator> decoder;
-#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+#if defined(OS_CHROMEOS) && (defined(ARCH_CPU_ARMEL) || \
+    (defined(USE_OZONE) && defined(USE_V4L2_CODEC)))
   scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kDecoder);
   if (device.get()) {
     base::WeakPtr<VideoDecodeAccelerator::Client> weak_client = AsWeakPtr();
@@ -522,7 +525,7 @@ GLRenderingVDAClient::CreateV4L2VDA() {
 scoped_ptr<media::VideoDecodeAccelerator>
 GLRenderingVDAClient::CreateV4L2SliceVDA() {
   scoped_ptr<media::VideoDecodeAccelerator> decoder;
-#if defined(OS_CHROMEOS) && defined(USE_V4L2_CODEC)
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL) && defined(USE_LIBV4L2)
   scoped_refptr<V4L2Device> device = V4L2Device::Create(V4L2Device::kDecoder);
   if (device.get()) {
     base::WeakPtr<VideoDecodeAccelerator::Client> weak_client = AsWeakPtr();

content/content_common.gypi

@@ -770,7 +770,7 @@
     }],
     ['use_v4lplugin==1 and chromeos==1', {
       'defines': [
-        'USE_LIBV4L2'
+        'USE_LIBV4L2',
       ],
       'variables': {
         'generate_stubs_script': '../tools/generate_stubs/generate_stubs.py',
@@ -821,40 +821,50 @@
       'defines': [
         'USE_V4L2_CODEC'
       ],
+    }],
+    ['chromeos==1 and (target_arch=="arm" or (use_ozone==1 and use_v4l2_codec==1))', {
       'dependencies': [
         '../media/media.gyp:media',
       ],
       'sources': [
-        'common/gpu/media/accelerated_video_decoder.h',
         'common/gpu/media/generic_v4l2_video_device.cc',
         'common/gpu/media/generic_v4l2_video_device.h',
-        'common/gpu/media/h264_decoder.cc',
-        'common/gpu/media/h264_decoder.h',
-        'common/gpu/media/h264_dpb.cc',
-        'common/gpu/media/h264_dpb.h',
         'common/gpu/media/v4l2_image_processor.cc',
         'common/gpu/media/v4l2_image_processor.h',
-        'common/gpu/media/v4l2_slice_video_decode_accelerator.cc',
-        'common/gpu/media/v4l2_slice_video_decode_accelerator.h',
         'common/gpu/media/v4l2_video_decode_accelerator.cc',
         'common/gpu/media/v4l2_video_decode_accelerator.h',
         'common/gpu/media/v4l2_video_device.cc',
         'common/gpu/media/v4l2_video_device.h',
         'common/gpu/media/v4l2_video_encode_accelerator.cc',
         'common/gpu/media/v4l2_video_encode_accelerator.h',
-        'common/gpu/media/vp8_decoder.cc',
-        'common/gpu/media/vp8_decoder.h',
-        'common/gpu/media/vp8_picture.cc',
-        'common/gpu/media/vp8_picture.h',
       ],
       'include_dirs': [
         '<(DEPTH)/third_party/khronos',
       ],
-    }],
-    ['target_arch == "arm" and chromeos == 1', {
-      'sources': [
-        'common/gpu/media/tegra_v4l2_video_device.cc',
-        'common/gpu/media/tegra_v4l2_video_device.h',
+      'conditions': [
+        ['target_arch == "arm"', {
+          'sources': [
+            'common/gpu/media/tegra_v4l2_video_device.cc',
+            'common/gpu/media/tegra_v4l2_video_device.h',
+          ],
+          'conditions': [
+            ['use_v4lplugin==1', {
+              'sources': [
+                'common/gpu/media/accelerated_video_decoder.h',
+                'common/gpu/media/h264_decoder.cc',
+                'common/gpu/media/h264_decoder.h',
+                'common/gpu/media/h264_dpb.cc',
+                'common/gpu/media/h264_dpb.h',
+                'common/gpu/media/v4l2_slice_video_decode_accelerator.cc',
+                'common/gpu/media/v4l2_slice_video_decode_accelerator.h',
+                'common/gpu/media/vp8_decoder.cc',
+                'common/gpu/media/vp8_decoder.h',
+                'common/gpu/media/vp8_picture.cc',
+                'common/gpu/media/vp8_picture.h',
+              ],
+            }],
+          ],
+        }],
       ],
     }],
     ['target_arch != "arm" and chromeos == 1', {

content/content_tests.gypi

@@ -4,6 +4,7 @@
 
 {
   'variables': {
+    'use_v4lplugin%': 0,
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
@@ -1617,6 +1618,9 @@
                   '../ui/ozone/ozone.gyp:ozone',       # Used by rendering_helper.cc
                 ],
               }],
+              ['use_v4lplugin==1', {
+                'defines': ['USE_LIBV4L2'],
+              }],
             ],
             # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
             'msvs_disabled_warnings': [ 4267, ],