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 <math.h>
13 #include "vpx_mem/vpx_mem.h"
14
15 #include "vp8/encoder/quantize.h"
16 #include "vp8/common/entropy.h"
17
18 DECLARE_ALIGNED(16, const short, vp8_rvsplus1_default_zig_zag1d[16]) =
19 {
20 1, 2, 6, 7,
21 3, 5, 8, 13,
22 4, 9, 12, 14,
23 10, 11, 15, 16,
24 };
25
26
27 extern int vp8_fast_quantize_b_neon_func(short *coeff_ptr, short *zbin_ptr, short *qcoeff_ptr, short *dqcoeff_ptr, short *dequant_ptr, const short *scan_mask, short *round_ptr, short *quant_ptr);
28
vp8_fast_quantize_b_neon(BLOCK * b,BLOCKD * d)29 void vp8_fast_quantize_b_neon(BLOCK *b, BLOCKD *d)
30 {
31 d->eob = vp8_fast_quantize_b_neon_func(b->coeff, b->zbin, d->qcoeff, d->dqcoeff, d->dequant, vp8_rvsplus1_default_zig_zag1d, b->round, b->quant_fast);
32 }
33
34 /*
35 //neon code is written according to the following rewritten c code
36 void vp8_fast_quantize_b_neon(BLOCK *b,BLOCKD *d)
37 {
38 int i, rc, eob;
39 int zbin;
40 int x, x1, y, z, sz;
41 short *coeff_ptr = &b->Coeff[0];
42 short *zbin_ptr = &b->Zbin[0][0];
43 short *round_ptr = &b->Round[0][0];
44 short *quant_ptr = &b->Quant[0][0];
45 short *qcoeff_ptr = d->qcoeff;
46 short *dqcoeff_ptr= d->dqcoeff;
47 short *dequant_ptr= &d->Dequant[0][0];
48
49 eob = 0;
50
51 for(i=0;i<16;i++)
52 {
53 z = coeff_ptr[i];
54 zbin = zbin_ptr[i] ;
55 x = abs(z); // x = abs(z)
56
57 if(x>=zbin)
58 {
59 sz = (z>>31); // sign of z
60 y = ((x+round_ptr[i])*quant_ptr[i])>>16; // quantize (x)
61 x1 = (y^sz) - sz; // get the sign back
62
63 qcoeff_ptr[i] = x1; // write to destination
64 dqcoeff_ptr[i] = x1 * dequant_ptr[i]; // dequantized value
65
66 if(y)
67 {
68 if(eob<vp8_rvsplus1_default_zig_zag1d[i])
69 eob=(int)vp8_rvsplus1_default_zig_zag1d[i]; // last nonzero coeffs
70 }
71 }else
72 {
73 qcoeff_ptr[i] = 0; // write to destination
74 dqcoeff_ptr[i] = 0; // dequantized value
75 }
76 }
77 d->eob = eob;
78 }
79 */
80