media/gpu/v4l2: apply workarounds outside of stream parser

The stream parsing method should only do that - parse the stream.
Workarounds can be applied independently of it, so move them outside of
the method so we can move it around more easily.

BUG=b:149663704
TEST=vdatest passes on Hana.

Change-Id: I9f1305463424d14678f64d9056a54a5f761a39fe
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2130453
Auto-Submit: Alexandre Courbot <acourbot@chromium.org>
Reviewed-by: Chih-Yu Huang <akahuang@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#755262}

media/gpu/v4l2/v4l2_video_decode_accelerator.cc

@@ -940,6 +940,16 @@ void V4L2VideoDecodeAccelerator::DecodeBufferTask() {
         buffer->data() + decoder_current_bitstream_buffer_->bytes_used;
     const size_t data_size =
         buffer->data_size() - decoder_current_bitstream_buffer_->bytes_used;
+
+    for (auto& workaround : workarounds_) {
+      auto result = workaround->Apply(data, data_size);
+      if (result == V4L2StatefulWorkaround::Result::NotifyError) {
+        LOG(ERROR) << "Failed applying a workaround";
+        NOTIFY_ERROR(PLATFORM_FAILURE);
+        return;
+      }
+    }
+
     if (!AdvanceFrameFragment(data, data_size, &decoded_size)) {
       LOG(ERROR) << "Invalid Stream";
       NOTIFY_ERROR(UNREADABLE_INPUT);
@@ -986,15 +996,6 @@ bool V4L2VideoDecodeAccelerator::AdvanceFrameFragment(const uint8_t* data,
                                                       size_t* endpos) {
   DCHECK(decoder_thread_.task_runner()->BelongsToCurrentThread());
 
-  for (auto& workaround : workarounds_) {
-    auto result = workaround->Apply(data, size);
-    if (result == V4L2StatefulWorkaround::Result::NotifyError) {
-      LOG(ERROR) << "Failed doing a workaround";
-      NOTIFY_ERROR(PLATFORM_FAILURE);
-      return false;
-    }
-  }
-
   if (video_profile_ >= H264PROFILE_MIN && video_profile_ <= H264PROFILE_MAX) {
     // For H264, we need to feed HW one frame at a time.  This is going to take
     // some parsing of our input stream.