Implements RGB to YV12 conversion in YASM.

media/media.gyp

Index: media/media.gyp
===================================================================
--- media/media.gyp	(revision 88621)
+++ media/media.gyp	(working copy)
@@ -6,6 +6,7 @@
   'variables': {
     'chromium_code': 1,
     'player_x11_renderer%': 'x11',
+    'use_system_yasm%': 0,
   },
   'targets': [
     {
@@ -320,10 +321,93 @@
              },
           },
         }],
+        [ 'target_arch=="ia32" or target_arch=="x64"', {
+          'sources': [
+            'base/simd/convert_row.asm',
+          ],
+        }],
+        [ 'OS=="win"', {
+          'variables': {
+            'object_suffix': 'obj',
+            'yasm_path': '../third_party/yasm/binaries/win/yasm<(EXECUTABLE_SUFFIX)',
+            'yasm_format': '-fwin32',
+            'yasm_flags': [
+              '-DWIN32',
+              '-DMSVC',
+            ],
+          },
+        }],
+        [ 'OS=="mac"', {
+          'dependencies': [
+            '../third_party/yasm/yasm.gyp:yasm#host',
+          ],
+          'variables': {
+            'object_suffix': 'o',
+            'yasm_path': '<(PRODUCT_DIR)/yasm',
+            'yasm_format': '-fmacho',
+            'yasm_flags': [
+              '-DMACHO',
+            ],
+          },
+        }],
+        [ 'OS=="linux"', {
+          'conditions': [
+            [ 'use_system_yasm==0', {
+              'dependencies': [
+                '../third_party/yasm/yasm.gyp:yasm#host',
+              ],
+            }],
+          ],
+          'variables': {
+            'object_suffix': 'o',
+            'conditions': [
+              [ 'use_system_yasm==1', {
+                'yasm_path': '<!(which yasm)',
+              }, {
+                'yasm_path': '<(PRODUCT_DIR)/yasm',
+              }],
+              [ 'target_arch=="ia32"', {
+                'yasm_format': '-felf',
+                'yasm_flag': '-D__X86__',
+                'yasm_flags': [
+                  '-D__x86__',
+                  '-DELF',
+                ],
+              }, {
+                'yasm_format': '-felf64',
+                'yasm_flag': '-D__x86_64__',
+                'yasm_flags': [
+                  '-D__x86_64__',
+                  '-DELF',
+                ],
+              }],
+            ],
+          },
+        }],
       ],
       'sources': [
         'base/yuv_convert_sse2.cc',
       ],
+      'rules': [
+        {
+          'rule_name': 'assemble',
+          'extension': 'asm',
+          'inputs': [ '<(yasm_path)', ],
+          'outputs': [
+            '<(SHARED_INTERMEDIATE_DIR)/media/<(RULE_INPUT_ROOT).<(object_suffix)',
+          ],
+          'action': [
+            '<(yasm_path)',
+            '<(yasm_format)',
+            '<@(yasm_flags)',
+            '-Isimd/',
+            '-o', '<(SHARED_INTERMEDIATE_DIR)/media/<(RULE_INPUT_ROOT).<(object_suffix)',
+            '<(RULE_INPUT_PATH)',
+          ],
+          'process_outputs_as_sources': 1,
+          'message': 'Building <(RULE_INPUT_ROOT).<(object_suffix)',
+        },
+      ],
     },
     {
       'target_name': 'ffmpeg_unittests',