media/libvpx/vp8/encoder/psnr.c@ac0c01689b40
media/libvpx/vp8/encoder/psnr.c
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /*
2 * Copyright (c) 2010 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 */
12 #include "vpx_scale/yv12config.h"
13 #include "math.h"
14 #include "vp8/common/systemdependent.h" /* for vp8_clear_system_state() */
16 #define MAX_PSNR 100
18 double vp8_mse2psnr(double Samples, double Peak, double Mse)
19 {
20 double psnr;
22 if ((double)Mse > 0.0)
23 psnr = 10.0 * log10(Peak * Peak * Samples / Mse);
24 else
25 psnr = MAX_PSNR; /* Limit to prevent / 0 */
27 if (psnr > MAX_PSNR)
28 psnr = MAX_PSNR;
30 return psnr;
31 }
