Add querying supported formats to V4L2 VEA

content/common/gpu/media/v4l2_video_encode_accelerator.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 <linux/videodev2.h>
 #include <poll.h>
 #include <sys/eventfd.h>
 #include <sys/ioctl.h>
 #include <sys/mman.h>
@@ skipping 266 matching lines @@
   // Set to kError state just in case.
   SetEncoderState(kError);
 
   delete this;
 }
 
 std::vector<media::VideoEncodeAccelerator::SupportedProfile>
 V4L2VideoEncodeAccelerator::GetSupportedProfiles() {
   std::vector<SupportedProfile> profiles;
   SupportedProfile profile;
-
-  const base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
-  if (cmd_line->HasSwitch(switches::kEnableWebRtcHWVp8Encoding)) {
-    profile.profile = media::VP8PROFILE_ANY;
-    profile.max_resolution.SetSize(1920, 1088);
-    profile.max_framerate_numerator = 30;
-    profile.max_framerate_denominator = 1;
-    profiles.push_back(profile);
-  }
-
-  profile.profile = media::H264PROFILE_MAIN;
   profile.max_resolution.SetSize(1920, 1088);
   profile.max_framerate_numerator = 30;
   profile.max_framerate_denominator = 1;
-  profiles.push_back(profile);
+
+  v4l2_fmtdesc fmtdesc;
+  memset(&fmtdesc, 0, sizeof(fmtdesc));
+  fmtdesc.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
+  for (; device_->Ioctl(VIDIOC_ENUM_FMT, &fmtdesc) == 0; ++fmtdesc.index) {
+    switch (fmtdesc.pixelformat) {
+      case V4L2_PIX_FMT_H264:
+        profile.profile = media::H264PROFILE_MAIN;
+        profiles.push_back(profile);
+        break;
+      case V4L2_PIX_FMT_VP8:
+        profile.profile = media::VP8PROFILE_ANY;
+        profiles.push_back(profile);
+        break;
+    }
+  }
 
   return profiles;
 }
 
 void V4L2VideoEncodeAccelerator::FrameProcessed(
     bool force_keyframe,
     const scoped_refptr<media::VideoFrame>& frame) {
   DCHECK(child_message_loop_proxy_->BelongsToCurrentThread());
   DVLOG(3) << "FrameProcessed(): force_keyframe=" << force_keyframe;
 
@@ skipping 777 matching lines @@
   reqbufs.count = 0;
   reqbufs.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
   reqbufs.memory = V4L2_MEMORY_MMAP;
   IOCTL_OR_LOG_ERROR(VIDIOC_REQBUFS, &reqbufs);
 
   output_buffer_map_.clear();
   free_output_buffers_.clear();
 }
 
 }  // namespace content