// Copyright 2020 Google Inc.

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//      http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

//

////////////////////////////////////////////////////////////////////////////////

#include "examples/anim_util.h"

#include "imageio/imageio_util.h"

#include "src/webp/demux.h"

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  // WebPAnimDecoderGetInfo() is too late to check the canvas size as

  // WebPAnimDecoderNew() will handle the allocations.

  WebPBitstreamFeatures features;

  if (WebPGetFeatures(data, size, &features) == VP8_STATUS_OK) {

    if (!ImgIoUtilCheckSizeArgumentsOverflow(features.width * 4,

                                             features.height)) {

      return 0;

    }

  }

  // decode everything as an animation

  WebPData webp_data = { data, size };

  WebPAnimDecoder* const dec = WebPAnimDecoderNew(&webp_data, NULL);

  if (dec == NULL) return 0;

  WebPAnimInfo info;

  if (!WebPAnimDecoderGetInfo(dec, &info)) goto End;

  if (!ImgIoUtilCheckSizeArgumentsOverflow(info.canvas_width * 4,

                                           info.canvas_height)) {

    goto End;

  }

  while (WebPAnimDecoderHasMoreFrames(dec)) {

    uint8_t* buf;

    int timestamp;

    if (!WebPAnimDecoderGetNext(dec, &buf, &timestamp)) break;

  }

 End:

  WebPAnimDecoderDelete(dec);

  return 0;

}