idct.h

/*
 * Copyright 2016 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.
 */

#ifndef KNUSPERLI_IDCT_H_
#define KNUSPERLI_IDCT_H_

#include "jpeg_data.h"

namespace knusperli {

// Fills in 'result' with the inverse DCT of 'block'.
// The arguments 'block' and 'result' point to 8x8 arrays that are arranged in
// a row-by-row memory layout.
void ComputeBlockIDCT(const coeff_t* block, uint8_t* result);

}  // namespace knusperli

#endif  // KNUSPERLI_IDCT_H_