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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  */
10 
11 #include "vpx_config.h"
12 #include "vp8_rtcd.h"
13 #include "./vpx_dsp_rtcd.h"
14 #include "vp8/encoder/quantize.h"
15 #include "vp8/common/reconintra.h"
16 #include "vp8/common/reconintra4x4.h"
17 #include "encodemb.h"
18 #include "vp8/common/invtrans.h"
19 #include "encodeintra.h"
20 
vp8_encode_intra(VP8_COMP * cpi,MACROBLOCK * x,int use_dc_pred)21 int vp8_encode_intra(VP8_COMP *cpi, MACROBLOCK *x, int use_dc_pred) {
22   int i;
23   int intra_pred_var = 0;
24   (void)cpi;
25 
26   if (use_dc_pred) {
27     x->e_mbd.mode_info_context->mbmi.mode = DC_PRED;
28     x->e_mbd.mode_info_context->mbmi.uv_mode = DC_PRED;
29     x->e_mbd.mode_info_context->mbmi.ref_frame = INTRA_FRAME;
30 
31     vp8_encode_intra16x16mby(x);
32 
33     vp8_inverse_transform_mby(&x->e_mbd);
34   } else {
35     for (i = 0; i < 16; ++i) {
36       x->e_mbd.block[i].bmi.as_mode = B_DC_PRED;
37       vp8_encode_intra4x4block(x, i);
38     }
39   }
40 
41   intra_pred_var = vpx_get_mb_ss(x->src_diff);
42 
43   return intra_pred_var;
44 }
45 
vp8_encode_intra4x4block(MACROBLOCK * x,int ib)46 void vp8_encode_intra4x4block(MACROBLOCK *x, int ib) {
47   BLOCKD *b = &x->e_mbd.block[ib];
48   BLOCK *be = &x->block[ib];
49   int dst_stride = x->e_mbd.dst.y_stride;
50   unsigned char *dst = x->e_mbd.dst.y_buffer + b->offset;
51   unsigned char *Above = dst - dst_stride;
52   unsigned char *yleft = dst - 1;
53   unsigned char top_left = Above[-1];
54 
55   vp8_intra4x4_predict(Above, yleft, dst_stride, b->bmi.as_mode, b->predictor,
56                        16, top_left);
57 
58   vp8_subtract_b(be, b, 16);
59 
60   x->short_fdct4x4(be->src_diff, be->coeff, 32);
61 
62   x->quantize_b(be, b);
63 
64   if (*b->eob > 1) {
65     vp8_short_idct4x4llm(b->dqcoeff, b->predictor, 16, dst, dst_stride);
66   } else {
67     vp8_dc_only_idct_add(b->dqcoeff[0], b->predictor, 16, dst, dst_stride);
68   }
69 }
70 
vp8_encode_intra4x4mby(MACROBLOCK * mb)71 void vp8_encode_intra4x4mby(MACROBLOCK *mb) {
72   int i;
73 
74   MACROBLOCKD *xd = &mb->e_mbd;
75   intra_prediction_down_copy(xd, xd->dst.y_buffer - xd->dst.y_stride + 16);
76 
77   for (i = 0; i < 16; ++i) vp8_encode_intra4x4block(mb, i);
78   return;
79 }
80 
vp8_encode_intra16x16mby(MACROBLOCK * x)81 void vp8_encode_intra16x16mby(MACROBLOCK *x) {
82   BLOCK *b = &x->block[0];
83   MACROBLOCKD *xd = &x->e_mbd;
84 
85   vp8_build_intra_predictors_mby_s(xd, xd->dst.y_buffer - xd->dst.y_stride,
86                                    xd->dst.y_buffer - 1, xd->dst.y_stride,
87                                    xd->dst.y_buffer, xd->dst.y_stride);
88 
89   vp8_subtract_mby(x->src_diff, *(b->base_src), b->src_stride, xd->dst.y_buffer,
90                    xd->dst.y_stride);
91 
92   vp8_transform_intra_mby(x);
93 
94   vp8_quantize_mby(x);
95 
96   if (x->optimize) vp8_optimize_mby(x);
97 }
98 
vp8_encode_intra16x16mbuv(MACROBLOCK * x)99 void vp8_encode_intra16x16mbuv(MACROBLOCK *x) {
100   MACROBLOCKD *xd = &x->e_mbd;
101 
102   vp8_build_intra_predictors_mbuv_s(xd, xd->dst.u_buffer - xd->dst.uv_stride,
103                                     xd->dst.v_buffer - xd->dst.uv_stride,
104                                     xd->dst.u_buffer - 1, xd->dst.v_buffer - 1,
105                                     xd->dst.uv_stride, xd->dst.u_buffer,
106                                     xd->dst.v_buffer, xd->dst.uv_stride);
107 
108   vp8_subtract_mbuv(x->src_diff, x->src.u_buffer, x->src.v_buffer,
109                     x->src.uv_stride, xd->dst.u_buffer, xd->dst.v_buffer,
110                     xd->dst.uv_stride);
111 
112   vp8_transform_mbuv(x);
113 
114   vp8_quantize_mbuv(x);
115 
116   if (x->optimize) vp8_optimize_mbuv(x);
117 }
118