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1 | /* | ||
2 | * RV30/40 decoder common dsp functions | ||
3 | * Copyright (c) 2007 Mike Melanson, Konstantin Shishkov | ||
4 | * Copyright (c) 2011 Janne Grunau | ||
5 | * | ||
6 | * This file is part of FFmpeg. | ||
7 | * | ||
8 | * FFmpeg is free software; you can redistribute it and/or | ||
9 | * modify it under the terms of the GNU Lesser General Public | ||
10 | * License as published by the Free Software Foundation; either | ||
11 | * version 2.1 of the License, or (at your option) any later version. | ||
12 | * | ||
13 | * FFmpeg is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
16 | * Lesser General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU Lesser General Public | ||
19 | * License along with FFmpeg; if not, write to the Free Software | ||
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
21 | */ | ||
22 | |||
23 | /** | ||
24 | * @file | ||
25 | * RV30/40 decoder common dsp functions | ||
26 | */ | ||
27 | |||
28 | #include "rv34dsp.h" | ||
29 | #include "libavutil/common.h" | ||
30 | |||
31 | /** | ||
32 | * @name RV30/40 inverse transform functions | ||
33 | * @{ | ||
34 | */ | ||
35 | |||
36 | 374935 | static av_always_inline void rv34_row_transform(int temp[16], int16_t *block) | |
37 | { | ||
38 | int i; | ||
39 | |||
40 |
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41 | 1499740 | const int z0 = 13*(block[i+4*0] + block[i+4*2]); | |
42 | 1499740 | const int z1 = 13*(block[i+4*0] - block[i+4*2]); | |
43 | 1499740 | const int z2 = 7* block[i+4*1] - 17*block[i+4*3]; | |
44 | 1499740 | const int z3 = 17* block[i+4*1] + 7*block[i+4*3]; | |
45 | |||
46 | 1499740 | temp[4*i+0] = z0 + z3; | |
47 | 1499740 | temp[4*i+1] = z1 + z2; | |
48 | 1499740 | temp[4*i+2] = z1 - z2; | |
49 | 1499740 | temp[4*i+3] = z0 - z3; | |
50 | } | ||
51 | 374935 | } | |
52 | |||
53 | /** | ||
54 | * Real Video 3.0/4.0 inverse transform + sample reconstruction | ||
55 | * Code is almost the same as in SVQ3, only scaling is different. | ||
56 | */ | ||
57 | 366711 | static void rv34_idct_add_c(uint8_t *dst, ptrdiff_t stride, int16_t *block){ | |
58 | int temp[16]; | ||
59 | int i; | ||
60 | |||
61 | 366711 | rv34_row_transform(temp, block); | |
62 | 366711 | memset(block, 0, 16*sizeof(int16_t)); | |
63 | |||
64 |
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65 | 1466844 | const int z0 = 13*(temp[4*0+i] + temp[4*2+i]) + 0x200; | |
66 | 1466844 | const int z1 = 13*(temp[4*0+i] - temp[4*2+i]) + 0x200; | |
67 | 1466844 | const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i]; | |
68 | 1466844 | const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i]; | |
69 | |||
70 | 1466844 | dst[0] = av_clip_uint8( dst[0] + ( (z0 + z3) >> 10 ) ); | |
71 | 1466844 | dst[1] = av_clip_uint8( dst[1] + ( (z1 + z2) >> 10 ) ); | |
72 | 1466844 | dst[2] = av_clip_uint8( dst[2] + ( (z1 - z2) >> 10 ) ); | |
73 | 1466844 | dst[3] = av_clip_uint8( dst[3] + ( (z0 - z3) >> 10 ) ); | |
74 | |||
75 | 1466844 | dst += stride; | |
76 | } | ||
77 | 366711 | } | |
78 | |||
79 | /** | ||
80 | * RealVideo 3.0/4.0 inverse transform for DC block | ||
81 | * | ||
82 | * Code is almost the same as rv34_inv_transform() | ||
83 | * but final coefficients are multiplied by 1.5 and have no rounding. | ||
84 | */ | ||
85 | 8224 | static void rv34_inv_transform_noround_c(int16_t *block){ | |
86 | int temp[16]; | ||
87 | int i; | ||
88 | |||
89 | 8224 | rv34_row_transform(temp, block); | |
90 | |||
91 |
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92 | 32896 | const int z0 = 39*(temp[4*0+i] + temp[4*2+i]); | |
93 | 32896 | const int z1 = 39*(temp[4*0+i] - temp[4*2+i]); | |
94 | 32896 | const int z2 = 21* temp[4*1+i] - 51*temp[4*3+i]; | |
95 | 32896 | const int z3 = 51* temp[4*1+i] + 21*temp[4*3+i]; | |
96 | |||
97 | 32896 | block[i*4+0] = (z0 + z3) >> 11; | |
98 | 32896 | block[i*4+1] = (z1 + z2) >> 11; | |
99 | 32896 | block[i*4+2] = (z1 - z2) >> 11; | |
100 | 32896 | block[i*4+3] = (z0 - z3) >> 11; | |
101 | } | ||
102 | 8224 | } | |
103 | |||
104 | 620730 | static void rv34_idct_dc_add_c(uint8_t *dst, ptrdiff_t stride, int dc) | |
105 | { | ||
106 | int i, j; | ||
107 | |||
108 | 620730 | dc = (13*13*dc + 0x200) >> 10; | |
109 |
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110 | { | ||
111 |
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112 | 9931680 | dst[j] = av_clip_uint8( dst[j] + dc ); | |
113 | |||
114 | 2482920 | dst += stride; | |
115 | } | ||
116 | 620730 | } | |
117 | |||
118 | 9206 | static void rv34_inv_transform_dc_noround_c(int16_t *block) | |
119 | { | ||
120 | 9206 | int16_t dc = (13 * 13 * 3 * block[0]) >> 11; | |
121 | int i, j; | ||
122 | |||
123 |
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124 |
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125 | 147296 | block[j] = dc; | |
126 | 9206 | } | |
127 | |||
128 | /** @} */ // transform | ||
129 | |||
130 | |||
131 | 35 | av_cold void ff_rv34dsp_init(RV34DSPContext *c) | |
132 | { | ||
133 | 35 | c->rv34_inv_transform = rv34_inv_transform_noround_c; | |
134 | 35 | c->rv34_inv_transform_dc = rv34_inv_transform_dc_noround_c; | |
135 | |||
136 | 35 | c->rv34_idct_add = rv34_idct_add_c; | |
137 | 35 | c->rv34_idct_dc_add = rv34_idct_dc_add_c; | |
138 | |||
139 | #if ARCH_ARM | ||
140 | ff_rv34dsp_init_arm(c); | ||
141 | #elif ARCH_RISCV | ||
142 | ff_rv34dsp_init_riscv(c); | ||
143 | #elif ARCH_X86 | ||
144 | 35 | ff_rv34dsp_init_x86(c); | |
145 | #endif | ||
146 | 35 | } | |
147 |