MJPEG acceleration for V4L2

content/common/gpu/media/generic_v4l2_device.cc

 // Copyright 2014 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.
 //
 
 #include <fcntl.h>
 #include <libdrm/drm_fourcc.h>
 #include <linux/videodev2.h>
 #include <poll.h>
 #include <sys/eventfd.h>
@@ skipping 19 matching lines @@
 static const base::FilePath::CharType kV4l2Lib[] =
     FILE_PATH_LITERAL("/usr/lib/libv4l2.so");
 #endif
 
 namespace content {
 
 namespace {
 const char kDecoderDevice[] = "/dev/video-dec";
 const char kEncoderDevice[] = "/dev/video-enc";
 const char kImageProcessorDevice[] = "/dev/image-proc0";
+const char kJpegDecoderDevice[] = "/dev/jpeg-dec";
 }
 
 GenericV4L2Device::GenericV4L2Device(Type type)
     : V4L2Device(type),
       use_libv4l2_(false) {
 }
 
 GenericV4L2Device::~GenericV4L2Device() {
 #if defined(USE_LIBV4L2)
   if (use_libv4l2_ && device_fd_.is_valid())
@@ skipping 86 matching lines @@
   switch (type_) {
     case kDecoder:
       device_path = kDecoderDevice;
       break;
     case kEncoder:
       device_path = kEncoderDevice;
       break;
     case kImageProcessor:
       device_path = kImageProcessorDevice;
       break;
+    case kJpegDecoder:
+      device_path = kJpegDecoderDevice;
+      break;
   }
 
   DVLOG(2) << "Initialize(): opening device: " << device_path;
   // Open the video device.
   device_fd_.reset(
       HANDLE_EINTR(open(device_path, O_RDWR | O_NONBLOCK | O_CLOEXEC)));
   if (!device_fd_.is_valid()) {
     return false;
   }
 #if defined(USE_LIBV4L2)
@@ skipping 135 matching lines @@
   StubPathMap paths;
   paths[kModuleV4l2].push_back(kV4l2Lib);
 
   return InitializeStubs(paths);
 #else
   return true;
 #endif
 }
 
 }  //  namespace content