/*

** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding

** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

**

** Any non-GPL usage of this software or parts of this software is strictly

** forbidden.

**

** The "appropriate copyright message" mentioned in section 2c of the GPLv2

** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com"

**

** Commercial non-GPL licensing of this software is possible.

** For more info contact Nero AG through Mpeg4AAClicense@nero.com.

**/

#include <fenv.h> 

#include <stddef.h>

#include <stdint.h>

#include <string.h>

#include <stdlib.h>

#include "neaacdec.h"

int feenableexcept(int excepts);

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

  size_t preamble = 2 + 2 + 1 + sizeof(NeAACDecConfiguration);

  NeAACDecConfiguration config;

  uint64_t sample_rate;

  unsigned char num_channels;

  NeAACDecConfigurationPtr config_ptr;

  /* feenableexcept(FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW); */

  if (size < preamble) return 0;

  size_t len1 = data[0] | (data[1] << 8);

  data += 2;

  size_t len2 = data[0] | (data[1] << 8);

  data += 2;

  uint8_t flags = data[0];

  data += 1;

  memcpy(&config, data, sizeof(NeAACDecConfiguration));

  data += sizeof(NeAACDecConfiguration);

  size -= preamble;

  if (len1 + len2 > size) return 0;

  size_t len3 = size - len1 - len2;

  int use_init2 = flags & 1;

  int seek_before = flags & 2;

  int seek_between = flags & 4;

  size_t buffer_op = (flags >> 3) & 3;

  int use_drm = flags & 32;

  int drm_channels = (flags >> 5) & 7;

  unsigned long drm_sample_rate = config.defSampleRate;

  int res, ok;

  const size_t kBufferSize[4] = {0, 0, 16, 16384};

  size_t buffer_size = kBufferSize[buffer_op];

  void* buffer = buffer_size > 0 ? (unsigned char *)malloc(buffer_size) : NULL;

  unsigned char* part1 = (unsigned char *)malloc(len1);

  unsigned char* part2 = (unsigned char *)malloc(len2);

  unsigned char* part3 = (unsigned char *)malloc(len3);

  memcpy(part1, data, len1);

  data += len1;

  memcpy(part2, data, len2);

  data += len2;

  memcpy(part3, data, len3);

  data += len3;

  NeAACDecHandle decoder = NeAACDecOpen();

  ok = NeAACDecSetConfiguration(decoder, &config);

  if (!ok) goto cleanup;

  config_ptr = NeAACDecGetCurrentConfiguration(decoder);

  if (!config_ptr) __builtin_trap();

  if (use_init2) {

    res = NeAACDecInit2(decoder, part1, len1, &sample_rate, &num_channels);

  } else {

    res = NeAACDecInit(decoder, part1, len1, &sample_rate, &num_channels);

  }

  if (use_drm) {

#ifdef DRM_SUPPORT

    NeAACDecInitDRM(&decoder, drm_channels, drm_sample_rate);

#else

    (void)drm_channels;

    (void)drm_sample_rate;

#endif

  }

  if (res != 0) goto cleanup;

  NeAACDecFrameInfo faad_info;

  if (seek_before) {

    NeAACDecPostSeekReset(decoder, 0x1234567);

  }

  NeAACDecDecode(decoder, &faad_info, part2, len2);

  if (seek_between) {

    NeAACDecPostSeekReset(decoder, -0x1234567);

  }

  if (buffer_op == 0) {

    NeAACDecDecode(decoder, &faad_info, part3, len3);

  } else {

    NeAACDecDecode2(decoder, &faad_info, part3, len3, &buffer, buffer_size);

  }

cleanup:

  NeAACDecClose(decoder);

  free(part1);

  free(part2);

  free(part3);

  if (buffer) free(buffer);

  return 0;

}