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
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"
19
20
21int vp8_encode_intra(VP8_COMP *cpi, MACROBLOCK *x, int use_dc_pred)
22{
23
24    int i;
25    int intra_pred_var = 0;
26    (void) cpi;
27
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;
33
34        vp8_encode_intra16x16mby(x);
35
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    }
46
47    intra_pred_var = vp8_get_mb_ss(x->src_diff);
48
49    return intra_pred_var;
50}
51
52void 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];
61
62    vp8_intra4x4_predict(Above, yleft, dst_stride, b->bmi.as_mode,
63                         b->predictor, 16, top_left);
64
65    vp8_subtract_b(be, b, 16);
66
67    x->short_fdct4x4(be->src_diff, be->coeff, 32);
68
69    x->quantize_b(be, b);
70
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}
80
81void vp8_encode_intra4x4mby(MACROBLOCK *mb)
82{
83    int i;
84
85    MACROBLOCKD *xd = &mb->e_mbd;
86    intra_prediction_down_copy(xd, xd->dst.y_buffer - xd->dst.y_stride + 16);
87
88    for (i = 0; i < 16; i++)
89        vp8_encode_intra4x4block(mb, i);
90    return;
91}
92
93void vp8_encode_intra16x16mby(MACROBLOCK *x)
94{
95    BLOCK *b = &x->block[0];
96    MACROBLOCKD *xd = &x->e_mbd;
97
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);
104
105    vp8_subtract_mby(x->src_diff, *(b->base_src),
106        b->src_stride, xd->dst.y_buffer, xd->dst.y_stride);
107
108    vp8_transform_intra_mby(x);
109
110    vp8_quantize_mby(x);
111
112    if (x->optimize)
113        vp8_optimize_mby(x);
114}
115
116void vp8_encode_intra16x16mbuv(MACROBLOCK *x)
117{
118    MACROBLOCKD *xd = &x->e_mbd;
119
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);
127
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);
131
132    vp8_transform_mbuv(x);
133
134    vp8_quantize_mbuv(x);
135
136    if (x->optimize)
137        vp8_optimize_mbuv(x);
138}
139