media/libvpx/vp8/encoder/encodeintra.c@ac0c01689b40
media/libvpx/vp8/encoder/encodeintra.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_config.h"
13 #include "vp8_rtcd.h"
14 #include "quantize.h"
15 #include "vp8/common/reconintra4x4.h"
16 #include "encodemb.h"
17 #include "vp8/common/invtrans.h"
18 #include "encodeintra.h"
21 int vp8_encode_intra(VP8_COMP *cpi, MACROBLOCK *x, int use_dc_pred)
22 {
24 int i;
25 int intra_pred_var = 0;
26 (void) cpi;
28 if (use_dc_pred)
29 {
30 x->e_mbd.mode_info_context->mbmi.mode = DC_PRED;
31 x->e_mbd.mode_info_context->mbmi.uv_mode = DC_PRED;
32 x->e_mbd.mode_info_context->mbmi.ref_frame = INTRA_FRAME;
34 vp8_encode_intra16x16mby(x);
36 vp8_inverse_transform_mby(&x->e_mbd);
37 }
38 else
39 {
40 for (i = 0; i < 16; i++)
41 {
42 x->e_mbd.block[i].bmi.as_mode = B_DC_PRED;
43 vp8_encode_intra4x4block(x, i);
44 }
45 }
47 intra_pred_var = vp8_get_mb_ss(x->src_diff);
49 return intra_pred_var;
50 }
52 void vp8_encode_intra4x4block(MACROBLOCK *x, int ib)
53 {
54 BLOCKD *b = &x->e_mbd.block[ib];
55 BLOCK *be = &x->block[ib];
56 int dst_stride = x->e_mbd.dst.y_stride;
57 unsigned char *dst = x->e_mbd.dst.y_buffer + b->offset;
58 unsigned char *Above = dst - dst_stride;
59 unsigned char *yleft = dst - 1;
60 unsigned char top_left = Above[-1];
62 vp8_intra4x4_predict(Above, yleft, dst_stride, b->bmi.as_mode,
63 b->predictor, 16, top_left);
65 vp8_subtract_b(be, b, 16);
67 x->short_fdct4x4(be->src_diff, be->coeff, 32);
69 x->quantize_b(be, b);
71 if (*b->eob > 1)
72 {
73 vp8_short_idct4x4llm(b->dqcoeff, b->predictor, 16, dst, dst_stride);
74 }
75 else
76 {
77 vp8_dc_only_idct_add(b->dqcoeff[0], b->predictor, 16, dst, dst_stride);
78 }
79 }
81 void vp8_encode_intra4x4mby(MACROBLOCK *mb)
82 {
83 int i;
85 MACROBLOCKD *xd = &mb->e_mbd;
86 intra_prediction_down_copy(xd, xd->dst.y_buffer - xd->dst.y_stride + 16);
88 for (i = 0; i < 16; i++)
89 vp8_encode_intra4x4block(mb, i);
90 return;
91 }
93 void vp8_encode_intra16x16mby(MACROBLOCK *x)
94 {
95 BLOCK *b = &x->block[0];
96 MACROBLOCKD *xd = &x->e_mbd;
98 vp8_build_intra_predictors_mby_s(xd,
99 xd->dst.y_buffer - xd->dst.y_stride,
100 xd->dst.y_buffer - 1,
101 xd->dst.y_stride,
102 xd->dst.y_buffer,
103 xd->dst.y_stride);
105 vp8_subtract_mby(x->src_diff, *(b->base_src),
106 b->src_stride, xd->dst.y_buffer, xd->dst.y_stride);
108 vp8_transform_intra_mby(x);
110 vp8_quantize_mby(x);
112 if (x->optimize)
113 vp8_optimize_mby(x);
114 }
116 void vp8_encode_intra16x16mbuv(MACROBLOCK *x)
117 {
118 MACROBLOCKD *xd = &x->e_mbd;
120 vp8_build_intra_predictors_mbuv_s(xd, xd->dst.u_buffer - xd->dst.uv_stride,
121 xd->dst.v_buffer - xd->dst.uv_stride,
122 xd->dst.u_buffer - 1,
123 xd->dst.v_buffer - 1,
124 xd->dst.uv_stride,
125 xd->dst.u_buffer, xd->dst.v_buffer,
126 xd->dst.uv_stride);
128 vp8_subtract_mbuv(x->src_diff, x->src.u_buffer,
129 x->src.v_buffer, x->src.uv_stride, xd->dst.u_buffer,
130 xd->dst.v_buffer, xd->dst.uv_stride);
132 vp8_transform_mbuv(x);
134 vp8_quantize_mbuv(x);
136 if (x->optimize)
137 vp8_optimize_mbuv(x);
138 }
