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

chrome/renderer/render_process.cc

@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 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.
 
@@ -31,6 +31,7 @@
 #include "ipc/ipc_channel.h"
 #include "ipc/ipc_message_utils.h"
 #include "media/base/media.h"
+#include "media/base/media_switches.h"
 #include "native_client/src/trusted/plugin/nacl_entry_points.h"
 #include "webkit/glue/webkit_glue.h"
 
@@ -105,6 +106,12 @@ RenderProcess::RenderProcess()
   initialized_media_library_ =
       PathService::Get(base::DIR_MODULE, &module_path) &&
       media::InitializeMediaLibrary(module_path);
+
+  // TODO(hclam): Add more checks here. Currently this is not used.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableOpenMax)) {
+    media::InitializeOpenMaxLibrary(module_path);
+  }
 #endif
 }
 

media/base/media.h

@@ -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.
 
@@ -20,7 +20,11 @@ namespace media {
 // Returns true if everything was successfully initialized, false otherwise.
 bool InitializeMediaLibrary(const FilePath& module_dir);
 
+// Attempts to initialize OpenMAX library.
+//
+// Returns true if OpenMAX was successfully initialized and loaded.
+bool InitializeOpenMaxLibrary(const FilePath& module_dir);
+
 }  // namespace media
 
 #endif  // MEDIA_BASE_MEDIA_H_
-

media/base/media_posix.cc

@@ -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.
 
@@ -12,6 +12,10 @@
 #include "base/logging.h"
 #include "base/path_service.h"
 #include "third_party/ffmpeg/ffmpeg_stubs.h"
+#if defined(OS_LINUX)
+// OpenMAX IL stub is generated only on Linux.
+#include "third_party/openmax/il_stubs.h"
+#endif
 
 namespace tp_ffmpeg = third_party_ffmpeg;
 
@@ -29,6 +33,7 @@ const FilePath::CharType sumo_name[] = FILE_PATH_LITERAL("libffmpegsumo.so");
 #else
 #error "Do not know how to construct DSO name for this OS."
 #endif
+const FilePath::CharType openmax_name[] = FILE_PATH_LITERAL("libOmxCore.so");
 
 // Retrieves the DSOName for the given key.
 std::string GetDSOName(tp_ffmpeg::StubModules stub_key) {
@@ -68,4 +73,30 @@ bool InitializeMediaLibrary(const FilePath& module_dir) {
   return tp_ffmpeg::InitializeStubs(paths);
 }
 
+#if defined(OS_LINUX)
+namespace tp_openmax = third_party_openmax;
+bool InitializeOpenMaxLibrary(const FilePath& module_dir) {
+  // TODO(ajwong): We need error resolution.
+  tp_openmax::StubPathMap paths;
+  for (int i = 0; i < static_cast<int>(tp_openmax::kNumStubModules); ++i) {
+    tp_openmax::StubModules module = static_cast<tp_openmax::StubModules>(i);
+
+    // Add the OpenMAX library first so it takes precedence.
+    paths[module].push_back(module_dir.Append(openmax_name).value());
+  }
+
+  bool result = tp_openmax::InitializeStubs(paths);
+  if (!result) {
+    LOG(FATAL) << "Cannot load " << openmax_name << "."
+               << " Make sure it exists for OpenMAX.";
+  }
+  return result;
+}
+#else
+bool InitializeOpenMaxLibrary(const FilePath& module_dir) {
+  NOTIMPLEMENTED() << "OpenMAX is only used in Linux.";
+  return false;
+}
+#endif
+
 }  // namespace media

media/base/media_win.cc

@@ -96,4 +96,9 @@ bool InitializeMediaLibrary(const FilePath& base_path) {
   return false;
 }
 
+bool InitializeOpenMaxLibrary(const FilePath& module_dir) {
+  NOTIMPLEMENTED() << "OpenMAX is not used in Windows.";
+  return false;
+}
+
 }  // namespace media

media/tools/omx_test/omx_test.cc

@@ -320,6 +320,12 @@ int main(int argc, char** argv) {
     loop_count = 1;
   DCHECK_GE(loop_count, 1);
 
+  // Initialize OpenMAX.
+  if (!media::InitializeOpenMaxLibrary(FilePath())) {
+    LOG(ERROR) << "Unable to initialize OpenMAX library.";
+    return false;
+  }
+
   // If FFmpeg should be used for demuxing load the library here and do
   // the initialization.
   if (use_ffmpeg && !InitFFmpeg()) {

media/tools/player_x11/player_x11.cc

@@ -64,6 +64,14 @@ bool InitX11() {
 bool InitPipeline(MessageLoop* message_loop,
                   const char* filename, bool enable_audio,
                   scoped_refptr<media::PipelineImpl>* pipeline) {
+  // Initialize OpenMAX.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableOpenMax) &&
+      !media::InitializeOpenMaxLibrary(FilePath())) {
+    std::cout << "Unable to initialize OpenMAX library."<< std::endl;
+    return false;
+  }
+
   // Load media libraries.
   if (!media::InitializeMediaLibrary(FilePath())) {
     std::cout << "Unable to initialize the media library." << std::endl;

third_party/ffmpeg/ffmpeg.gyp

@@ -592,7 +592,7 @@
   'targets': [
     {
       'variables': {
-        'generate_stubs_script': 'generate_stubs.py',
+        'generate_stubs_script': '../../tools/generate_stubs/generate_stubs.py',
         'sig_files': [
           # Note that these must be listed in dependency order.
           # (i.e. if A depends on B, then B must be listed before A.)

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);

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"
+
+}

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.',
             },
-          },
+          ],
         }],
       ],
     },