/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=2 et sw=2 tw=80: */

/* Copyright 2018 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. */

/* This file was originally imported from Google's oss-fuzz project at

 * https://github.com/google/oss-fuzz/tree/master/projects/libaom */

#define DECODE_MODE 1

#include "FuzzingInterface.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <memory>

#include "aom/aom_decoder.h"

#include "aom/aomdx.h"

#include "aom_ports/mem_ops.h"

#include "common/ivfdec.h"

static const char *const kIVFSignature = "DKIF";

static void close_file(FILE *file) { fclose(file); }

void usage_exit(void) { exit(EXIT_FAILURE); }

static int

LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {

  std::unique_ptr<FILE, decltype(&close_file)> file(

    fmemopen((void *)data, size, "rb"), &close_file);

  if (file == nullptr) {

    return 0;

  }

  char header[32];

  if (fread(header, 1, 32, file.get()) != 32) {

    return 0;

  }

  const AvxInterface *decoder = get_aom_decoder_by_name("av1");

  if (decoder == nullptr) {

    return 0;

  }

  aom_codec_ctx_t codec;

#if defined(DECODE_MODE)

  const int threads = 1;

#elif defined(DECODE_MODE_threaded)

  const int threads = 16;

#else

#error define one of DECODE_MODE or DECODE_MODE_threaded

#endif

  aom_codec_dec_cfg_t cfg = {threads, 0, 0};

  if (aom_codec_dec_init(&codec, decoder->codec_interface(), &cfg, 0)) {

    return 0;

  }

  int frame_in_cnt = 0;

  int frame_out_cnt = 0;

  uint8_t *buffer = nullptr;

  size_t buffer_size = 0;

  size_t frame_size = 0;

  while (!ivf_read_frame(file.get(), &buffer, &frame_size, &buffer_size,

                         nullptr)) {

    const aom_codec_err_t err =

        aom_codec_decode(&codec, buffer, frame_size, nullptr);

    ++frame_in_cnt;

    aom_codec_iter_t iter = nullptr;

    aom_image_t *img = nullptr;

    while ((img = aom_codec_get_frame(&codec, &iter)) != nullptr) {

      ++frame_out_cnt;

    }

  }

  aom_codec_destroy(&codec);

  free(buffer);

  return 0;

}

MOZ_FUZZING_INTERFACE_RAW(nullptr, LLVMFuzzerTestOneInput, AV1Decode);