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

5 files changed, 57 insertions, 3 deletions

diff --git a/media/base/media.h b/media/base/media.h
index 171d4e8..3d1a83a 100644
--- a/media/base/media.h
+++ b/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_
-
diff --git a/media/base/media_posix.cc b/media/base/media_posix.cc
index 9b1035c..210bea3 100644
--- a/media/base/media_posix.cc
+++ b/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
diff --git a/media/base/media_win.cc b/media/base/media_win.cc
index 975a301..e4d67f5 100644
--- a/media/base/media_win.cc
+++ b/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
diff --git a/media/tools/omx_test/omx_test.cc b/media/tools/omx_test/omx_test.cc
index 428bacc..e90f150 100644
--- a/media/tools/omx_test/omx_test.cc
+++ b/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()) {
diff --git a/media/tools/player_x11/player_x11.cc b/media/tools/player_x11/player_x11.cc
index 41207fd..24ba556 100644
--- a/media/tools/player_x11/player_x11.cc
+++ b/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;