1/*
2 *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef VPX_INTERNAL_VPX_PSNR_H_
12#define VPX_INTERNAL_VPX_PSNR_H_
13
14#ifdef __cplusplus
15extern "C" {
16#endif
17
18// TODO(dkovalev) change vpx_sse_to_psnr signature: double -> int64_t
19
20/*!\brief Converts SSE to PSNR
21 *
22 * Converts sum of squared errros (SSE) to peak signal-to-noise ratio (PNSR).
23 *
24 * \param[in]    samples       Number of samples
25 * \param[in]    peak          Max sample value
26 * \param[in]    sse           Sum of squared errors
27 */
28double vpx_sse_to_psnr(double samples, double peak, double sse);
29
30#ifdef __cplusplus
31}  // extern "C"
32#endif
33
34#endif  // VPX_INTERNAL_VPX_PSNR_H_
35