1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* BlackFin MPEGVIDEO OPTIMIZATIONS
*
* Copyright (C) 2007 Marc Hoffman <mmh@pleasantst.com>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/attributes.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/dsputil.h"
#include "libavcodec/mpegvideo.h"
#include "dsputil_bfin.h"
static int dct_quantize_bfin (MpegEncContext *s,
int16_t *block, int n,
int qscale, int *overflow)
{
int last_non_zero, q, start_i;
const short *qmat;
short *bias;
const uint8_t *scantable= s->intra_scantable.scantable;
short dc;
int max=0;
PROF("fdct",0);
s->dsp.fdct(block);
EPROF();
PROF("denoise",1);
if(s->dct_error_sum)
s->denoise_dct(s, block);
EPROF();
PROF("quant-init",2);
if (s->mb_intra) {
if (!s->h263_aic) {
if (n < 4)
q = s->y_dc_scale;
else
q = s->c_dc_scale;
q = q << 3;
} else
/* For AIC we skip quant/dequant of INTRADC */
q = 1 << 3;
/* note: block[0] is assumed to be positive */
dc = block[0] = (block[0] + (q >> 1)) / q;
start_i = 1;
last_non_zero = 0;
if(n<4){
bias = s->q_intra_matrix16[qscale][1];
qmat = s->q_intra_matrix16[qscale][0];
}else{
bias = s->q_chroma_intra_matrix16[qscale][1];
qmat = s->q_chroma_intra_matrix16[qscale][0];
}
} else {
start_i = 0;
last_non_zero = -1;
bias = s->q_inter_matrix16[qscale][1];
qmat = s->q_inter_matrix16[qscale][0];
}
EPROF();
PROF("quantize",4);
/* for(i=start_i; i<64; i++) { */
/* sign = (block[i]>>15)|1; */
/* level = ((abs(block[i])+bias[0])*qmat[i])>>16; */
/* if (level < 0) level = 0; */
/* max |= level; */
/* level = level * sign; */
/* block[i] = level; */
/* } */
__asm__ volatile
("i2=%1;\n\t"
"r1=[%1++]; \n\t"
"r0=r1>>>15 (v); \n\t"
"lsetup (0f,1f) lc0=%3; \n\t"
"0: r0=r0|%4; \n\t"
" r1=abs r1 (v) || r2=[%2++];\n\t"
" r1=r1+|+%5; \n\t"
" r1=max(r1,%6) (v); \n\t"
" r1.h=(a1 =r1.h*r2.h), r1.l=(a0 =r1.l*r2.l) (tfu); \n\t"
" %0=%0|r1; \n\t"
" r0.h=(a1 =r1.h*r0.h), r0.l=(a0 =r1.l*r0.l) (is) || r1=[%1++];\n\t"
"1: r0=r1>>>15 (v) || [i2++]=r0;\n\t"
"r1=%0>>16; \n\t"
"%0=%0|r1; \n\t"
"%0.h=0; \n\t"
: "=&d" (max)
: "b" (block), "b" (qmat), "a" (32), "d" (0x00010001), "d" (bias[0]*0x10001), "d" (0)
: "R0","R1","R2", "I2");
if (start_i == 1) block[0] = dc;
EPROF();
PROF("zzscan",5);
__asm__ volatile
("r0=b[%1--] (x); \n\t"
"lsetup (0f,1f) lc0=%3; \n\t" /* for(i=63; i>=start_i; i--) { */
"0: p0=r0; \n\t" /* j = scantable[i]; */
" p0=%2+(p0<<1); \n\t" /* if (block[j]) { */
" r0=w[p0]; \n\t" /* last_non_zero = i; */
" cc=r0==0; \n\t" /* break; */
" if !cc jump 2f; \n\t" /* } */
"1: r0=b[%1--] (x); \n\t" /* } */
" %0=%4; \n\t"
" jump 3f; \n\t"
"2: %0=lc0; \n\t"
"3:\n\t"
: "=d" (last_non_zero)
: "a" (scantable+63), "a" (block), "a" (63), "d" (last_non_zero)
: "P0","R0");
EPROF();
*overflow= s->max_qcoeff < max; //overflow might have happened
bfprof();
/* we need this permutation so that we correct the IDCT, we only permute the !=0 elements */
if (s->dsp.idct_permutation_type != FF_NO_IDCT_PERM)
ff_block_permute(block, s->dsp.idct_permutation, scantable, last_non_zero);
return last_non_zero;
}
av_cold void ff_MPV_common_init_bfin (MpegEncContext *s)
{
/* s->dct_quantize= dct_quantize_bfin; */
}
|
