Add support for Tegra V4L2 VDA

content/common/gpu/media/video_decode_accelerator_unittest.cc

 // Copyright (c) 2012 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.
 //
 // The bulk of this file is support code; sorry about that.  Here's an overview
 // to hopefully help readers of this code:
 // - RenderingHelper is charged with interacting with X11/{EGL/GLES2,GLX/GL} or
 //   Win/EGL.
 // - ClientState is an enum for the state of the decode client used by the test.
 // - ClientStateNotification is a barrier abstraction that allows the test code
 //   to be written sequentially and wait for the decode client to see certain
 //   state transitions.
 // - GLRenderingVDAClient is a VideoDecodeAccelerator::Client implementation
 // - Finally actual TEST cases are at the bottom of this file, using the above
 //   infrastructure.
 
+#include <dlfcn.h>
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <algorithm>
 #include <deque>
 #include <map>
 
 // Include gtest.h out of order because <X11/X.h> #define's Bool & None, which
 // gtest uses as struct names (inside a namespace).  This means that
 // #include'ing gtest after anything that pulls in X.h fails to compile.
@@ skipping 522 matching lines @@
   base::WeakPtr<VideoDecodeAccelerator::Client> weak_client = AsWeakPtr();
   if (throttling_client_) {
     client = throttling_client_.get();
     weak_client = throttling_client_->AsWeakPtr();
   }
 #if defined(OS_WIN)
   decoder_.reset(
       new DXVAVideoDecodeAccelerator(base::Bind(&DoNothingReturnTrue)));
 #elif defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
 
-  scoped_ptr<V4L2Device> device = V4L2Device::Create();
+  scoped_ptr<V4L2Device> device = V4L2Device::Create(
+      static_cast<EGLContext>(rendering_helper_->GetGLContext()));
   if (!device.get()) {
     NotifyError(media::VideoDecodeAccelerator::PLATFORM_FAILURE);
     return;
   }
   decoder_.reset(new V4L2VideoDecodeAccelerator(
       static_cast<EGLDisplay>(rendering_helper_->GetGLDisplay()),
       weak_client,
       base::Bind(&DoNothingReturnTrue),
       device.Pass(),
       base::MessageLoopProxy::current()));
@@ skipping 965 matching lines @@
   CommandLine::Init(argc, argv);
 
   // Needed to enable DVLOG through --vmodule.
   logging::LoggingSettings settings;
   settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
   CHECK(logging::InitLogging(settings));
 
   CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   DCHECK(cmd_line);
 
+#if defined(OS_CHROMEOS) && defined(ARCH_CPU_ARMEL)
+  dlopen("/usr/lib/libtegrav4l2.so", RTLD_NOW | RTLD_GLOBAL | RTLD_NODELETE);
+  errno = 0;

[sheu, 2014/03/21 23:19:54]

VaapiVideoDecodeAccelerator seems to get by without explicitly dlopen()-ing
here.  Can you look into how they do it?

[shivdasp, 2014/03/24 06:01:27]

It seems VaapiVDA is using some auto-gen mechanism to avoid the dlopen().
I am trying to understand it more but I am afraid might run into x86 only
scripts.
Do you have any pointers on how this autogen stuff works ? It might help me to
do the change quicker.

On 2014/03/21 23:19:54, sheu wrote:

+#endif
+
   CommandLine::SwitchMap switches = cmd_line->GetSwitches();
   for (CommandLine::SwitchMap::const_iterator it = switches.begin();
        it != switches.end(); ++it) {
     if (it->first == "test_video_data") {
       content::g_test_video_data = it->second.c_str();
       continue;
     }
     // TODO(wuchengli): remove frame_deliver_log after CrOS test get updated.
     // See http://crosreview.com/175426.
     if (it->first == "frame_delivery_log" || it->first == "output_log") {
@@ skipping 13 matching lines @@
     }
     if (it->first == "v" || it->first == "vmodule")
       continue;
     LOG(FATAL) << "Unexpected switch: " << it->first << ":" << it->second;
   }
 
   base::ShadowingAtExitManager at_exit_manager;
 
   return RUN_ALL_TESTS();
 }