Remove kIgnoreResolutionLimitsForAcceleratedVideoDecode flag

content/common/gpu/media/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 <libdrm/drm_fourcc.h>
 #include <linux/videodev2.h>
 
 #include "base/numerics/safe_conversions.h"
 #include "content/common/gpu/media/generic_v4l2_device.h"
 #if defined(ARCH_CPU_ARMEL)
@@ skipping 179 matching lines @@
 
   // Sanity checks. Calculated coded size has to contain given visible size
   // and fulfill buffer byte size requirements.
   DCHECK(gfx::Rect(coded_size).Contains(gfx::Rect(visible_size)));
   DCHECK_LE(sizeimage,
             media::VideoFrame::AllocationSize(frame_format, coded_size));
 
   return coded_size;
 }
 
+// static
+gfx::Size V4L2Device::GetMaxSupportedResolution(
+    const scoped_refptr<V4L2Device>& device,
+    unsigned int pixelformat) {
+  gfx::Size max_resolution;
+  v4l2_frmsizeenum frame_size;
+  memset(&frame_size, 0, sizeof(frame_size));
+  frame_size.pixel_format = pixelformat;
+  for (; device->Ioctl(VIDIOC_ENUM_FRAMESIZES, &frame_size) == 0;
+       ++frame_size.index) {
+    if (frame_size.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
+      if (frame_size.discrete.width >
+              static_cast<unsigned int>(max_resolution.width()) &&
+          frame_size.discrete.height >
+              static_cast<unsigned int>(max_resolution.height())) {
+        max_resolution.SetSize(frame_size.discrete.width,
+                               frame_size.discrete.height);
+      }
+    } else if (frame_size.type == V4L2_FRMIVAL_TYPE_STEPWISE ||
+               frame_size.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
+      max_resolution.SetSize(frame_size.stepwise.max_width,
+                             frame_size.stepwise.max_height);
+    }
+  }
+  if (max_resolution.IsEmpty()) {
+    LOG(ERROR) << "GetMaxSupportedResolution failed for format "
+               << std::hex << pixelformat;
+    max_resolution.SetSize(1920, 1088);
+  }
+  return max_resolution;
+}
+
 }  //  namespace content