V4L2VDA: do not queue output buffer during resolution change.

media/gpu/v4l2_video_decode_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 "media/gpu/v4l2_video_decode_accelerator.h"
 
 #include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/videodev2.h>
@@ skipping 2211 matching lines @@
     if (image_processor_bitstream_buffer_ids_.empty()) {
       NotifyFlushDoneIfNeeded();
       if (decoder_state_ == kChangingResolution)
         StartResolutionChange();
     }
   } else {
     DVLOGF(2) << "Bitstream buffer id " << bitstream_buffer_id << " not found "
               << "because of Reset. Drop the buffer";
     output_record.state = kFree;
     free_output_buffers_.push(output_buffer_index);
-    Enqueue();
+    // Do not queue the buffer if a resolution change is in progress. The queue
+    // is about to be destroyed anyway. Otherwise, the queue will be started in
+    // Enqueue and REQBUFS(0) will fail.
+    if (decoder_state_ != kChangingResolution)
+      Enqueue();
   }
 }
 
 void V4L2VideoDecodeAccelerator::ImageProcessorError() {
   LOGF(ERROR) << "Image processor error";
   NOTIFY_ERROR(PLATFORM_FAILURE);
 }
 
 }  // namespace media