media/libvpx/vp8/common/idct_blk.c@ac0c01689b40 (annotated)
media/libvpx/vp8/common/idct_blk.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.
| michael@0 | 1 | /* |
| michael@0 | 2 | * Copyright (c) 2010 The WebM project authors. All Rights Reserved. |
| michael@0 | 3 | * |
| michael@0 | 4 | * Use of this source code is governed by a BSD-style license |
| michael@0 | 5 | * that can be found in the LICENSE file in the root of the source |
| michael@0 | 6 | * tree. An additional intellectual property rights grant can be found |
| michael@0 | 7 | * in the file PATENTS. All contributing project authors may |
| michael@0 | 8 | * be found in the AUTHORS file in the root of the source tree. |
| michael@0 | 9 | */ |
| michael@0 | 10 | |
| michael@0 | 11 | #include "vpx_config.h" |
| michael@0 | 12 | #include "vp8_rtcd.h" |
| michael@0 | 13 | #include "vpx_mem/vpx_mem.h" |
| michael@0 | 14 | |
| michael@0 | 15 | void vp8_dequant_idct_add_c(short *input, short *dq, |
| michael@0 | 16 | unsigned char *dest, int stride); |
| michael@0 | 17 | void vp8_dc_only_idct_add_c(short input_dc, unsigned char * pred, |
| michael@0 | 18 | int pred_stride, unsigned char *dst_ptr, |
| michael@0 | 19 | int dst_stride); |
| michael@0 | 20 | |
| michael@0 | 21 | void vp8_dequant_idct_add_y_block_c |
| michael@0 | 22 | (short *q, short *dq, |
| michael@0 | 23 | unsigned char *dst, int stride, char *eobs) |
| michael@0 | 24 | { |
| michael@0 | 25 | int i, j; |
| michael@0 | 26 | |
| michael@0 | 27 | for (i = 0; i < 4; i++) |
| michael@0 | 28 | { |
| michael@0 | 29 | for (j = 0; j < 4; j++) |
| michael@0 | 30 | { |
| michael@0 | 31 | if (*eobs++ > 1) |
| michael@0 | 32 | vp8_dequant_idct_add_c (q, dq, dst, stride); |
| michael@0 | 33 | else |
| michael@0 | 34 | { |
| michael@0 | 35 | vp8_dc_only_idct_add_c (q[0]*dq[0], dst, stride, dst, stride); |
| michael@0 | 36 | vpx_memset(q, 0, 2 * sizeof(q[0])); |
| michael@0 | 37 | } |
| michael@0 | 38 | |
| michael@0 | 39 | q += 16; |
| michael@0 | 40 | dst += 4; |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | dst += 4*stride - 16; |
| michael@0 | 44 | } |
| michael@0 | 45 | } |
| michael@0 | 46 | |
| michael@0 | 47 | void vp8_dequant_idct_add_uv_block_c |
| michael@0 | 48 | (short *q, short *dq, |
| michael@0 | 49 | unsigned char *dstu, unsigned char *dstv, int stride, char *eobs) |
| michael@0 | 50 | { |
| michael@0 | 51 | int i, j; |
| michael@0 | 52 | |
| michael@0 | 53 | for (i = 0; i < 2; i++) |
| michael@0 | 54 | { |
| michael@0 | 55 | for (j = 0; j < 2; j++) |
| michael@0 | 56 | { |
| michael@0 | 57 | if (*eobs++ > 1) |
| michael@0 | 58 | vp8_dequant_idct_add_c (q, dq, dstu, stride); |
| michael@0 | 59 | else |
| michael@0 | 60 | { |
| michael@0 | 61 | vp8_dc_only_idct_add_c (q[0]*dq[0], dstu, stride, dstu, stride); |
| michael@0 | 62 | vpx_memset(q, 0, 2 * sizeof(q[0])); |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | q += 16; |
| michael@0 | 66 | dstu += 4; |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | dstu += 4*stride - 8; |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | for (i = 0; i < 2; i++) |
| michael@0 | 73 | { |
| michael@0 | 74 | for (j = 0; j < 2; j++) |
| michael@0 | 75 | { |
| michael@0 | 76 | if (*eobs++ > 1) |
| michael@0 | 77 | vp8_dequant_idct_add_c (q, dq, dstv, stride); |
| michael@0 | 78 | else |
| michael@0 | 79 | { |
| michael@0 | 80 | vp8_dc_only_idct_add_c (q[0]*dq[0], dstv, stride, dstv, stride); |
| michael@0 | 81 | vpx_memset(q, 0, 2 * sizeof(q[0])); |
| michael@0 | 82 | } |
| michael@0 | 83 | |
| michael@0 | 84 | q += 16; |
| michael@0 | 85 | dstv += 4; |
| michael@0 | 86 | } |
| michael@0 | 87 | |
| michael@0 | 88 | dstv += 4*stride - 8; |
| michael@0 | 89 | } |
| michael@0 | 90 | } |
