Generate stubs for OpenMAX IL

Generate stubs for OpenMAX IL so we don't need a real OpenMAX library for
building. The actual library is loaded during runtime.

TEST=Build is green
TEST=Running omx_test works on hardware with OpenMAX support

Review URL: http://codereview.chromium.org/661135

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40418 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 76 insertions, 21 deletions

diff --git a/third_party/openmax/il.sigs b/third_party/openmax/il.sigs
new file mode 100644
index 0000000..20d6b98
--- /dev/null
+++ b/third_party/openmax/il.sigs
@@ -0,0 +1,11 @@
+# Copyright (c) 2010 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.
+#
+# Functions from OpenMAX IL used in Chromium code.
+
+OMX_ERRORTYPE OMX_Init(void);
+OMX_ERRORTYPE OMX_Deinit(void);
+OMX_ERRORTYPE OMX_GetHandle(OMX_HANDLETYPE* pHandle, OMX_STRING cComponentName, OMX_PTR pAppData, OMX_CALLBACKTYPE* pCallBacks);
+OMX_ERRORTYPE OMX_FreeHandle(OMX_HANDLETYPE hComponent);
+OMX_ERRORTYPE OMX_GetComponentsOfRole (OMX_STRING role, OMX_U32* pNumComps, OMX_U8** compNames);
diff --git a/third_party/openmax/il_stub_headers.fragment b/third_party/openmax/il_stub_headers.fragment
new file mode 100644
index 0000000..222f4dc
--- /dev/null
+++ b/third_party/openmax/il_stub_headers.fragment
@@ -0,0 +1,8 @@
+// These are some extra includes needed in the generated stub file for defining
+// various OpenMAX types.
+
+extern "C" {
+
+#include "third_party/openmax/il/OMX_Core.h"
+
+}
diff --git a/third_party/openmax/openmax.gyp b/third_party/openmax/openmax.gyp
index ef14e41..16293e4 100644
--- a/third_party/openmax/openmax.gyp
+++ b/third_party/openmax/openmax.gyp
@@ -1,4 +1,4 @@
-# Copyright (c) 2009 The Chromium Authors. All rights reserved.
+# Copyright (c) 2010 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.
 
@@ -26,9 +26,12 @@
         'include_dirs': [
           'il',
         ],
+        'defines': [
+          '__OMX_EXPORTS',
+        ],
       },
       'conditions': [
-        ['openmax_type=="stub"', {
+        ['OS!="linux"', {
           'type': '<(library)',
           'dependencies': [
             '../../base/base.gyp:base',
@@ -42,31 +45,64 @@
           'defines': [
             '__OMX_EXPORTS',
           ],
+        }],
+        ['OS=="linux"', {
+          'variables': {
+            'generate_stubs_script': '../../tools/generate_stubs/generate_stubs.py',
+            'sig_files': [
+              'il.sigs',
+            ],
+            'extra_header': 'il_stub_headers.fragment',
+            'outfile_type': 'posix_stubs',
+            'stubs_filename_root': 'il_stubs',
+            'project_path': 'third_party/openmax',
+            'intermediate_dir': '<(INTERMEDIATE_DIR)',
+            'output_root': '<(SHARED_INTERMEDIATE_DIR)/openmax',
+           },
+          'type': '<(library)',
+          'dependencies': [
+            '../../base/base.gyp:base',
+          ],
+          'defines': [
+            '__OMX_EXPORTS',
+          ],
+          'include_dirs': [
+            'il',
+            '<(output_root)',
+            '../..',  # The chromium 'src' directory.
+          ],
           'direct_dependent_settings': {
-            'defines': [
-              '__OMX_EXPORTS',
+            'include_dirs': [
+              '<(output_root)',
+              '../..',  # The chromium 'src' directory.
             ],
           },
-        }],
-        ['openmax_type=="bellagio"', {
-          'type': 'none',
-          'direct_dependent_settings': {
-            'link_settings': {
-              'libraries': [
-                '-lomxil-bellagio',
+          'actions': [
+            {
+              'action_name': 'generate_stubs',
+              'inputs': [
+                '<(generate_stubs_script)',
+                '<(extra_header)',
+                '<@(sig_files)',
               ],
-            },
-          },
-        }],
-        ['openmax_type=="omxcore"', {
-          'type': 'none',
-          'direct_dependent_settings': {
-            'link_settings': {
-              'libraries': [
-                '-lOmxCore',
+              'outputs': [
+                '<(intermediate_dir)/<(stubs_filename_root).cc',
+                '<(output_root)/<(project_path)/<(stubs_filename_root).h',
+              ],
+              'action': ['python',
+                         '<(generate_stubs_script)',
+                         '-i', '<(intermediate_dir)',
+                         '-o', '<(output_root)/<(project_path)',
+                         '-t', '<(outfile_type)',
+                         '-e', '<(extra_header)',
+                         '-s', '<(stubs_filename_root)',
+                         '-p', '<(project_path)',
+                         '<@(_inputs)',
               ],
+              'process_outputs_as_sources': 1,
+              'message': 'Generating OpenMAX IL stubs for dynamic loading.',
             },
-          },
+          ],
         }],
       ],
     },