1b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian/*
2b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  Copyright (c) 2014 The WebM project authors. All Rights Reserved.
3b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *
4b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  Use of this source code is governed by a BSD-style license
5b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  that can be found in the LICENSE file in the root of the source
6b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  tree. An additional intellectual property rights grant can be found
7b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  in the file PATENTS.  All contributing project authors may
8b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *  be found in the AUTHORS file in the root of the source tree.
9b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian */
10b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
11b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#ifndef VPX_INTERNAL_VPX_PSNR_H_
12b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#define VPX_INTERNAL_VPX_PSNR_H_
13b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
14b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#ifdef __cplusplus
15b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanianextern "C" {
16b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#endif
17b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
18b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian// TODO(dkovalev) change vpx_sse_to_psnr signature: double -> int64_t
19b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
20b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian/*!\brief Converts SSE to PSNR
21b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *
22b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * Converts sum of squared errros (SSE) to peak signal-to-noise ratio (PNSR).
23b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian *
24b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * \param[in]    samples       Number of samples
25b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * \param[in]    peak          Max sample value
26b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian * \param[in]    sse           Sum of squared errors
27b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian */
28b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramaniandouble vpx_sse_to_psnr(double samples, double peak, double sse);
29b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
30b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#ifdef __cplusplus
31b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian}  // extern "C"
32b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#endif
33b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian
34b08e2e23eec181e9951df33cd704ac294c5407b6Vignesh Venkatasubramanian#endif  // VPX_INTERNAL_VPX_PSNR_H_
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