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2ba45a60 DM |
1 | /* |
2 | * Copyright (c) 2002 Falk Hueffner <falk@debian.org> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include "libavutil/attributes.h" | |
22 | #include "libavcodec/idctdsp.h" | |
23 | #include "idctdsp_alpha.h" | |
24 | #include "asm.h" | |
25 | ||
26 | void put_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels, | |
f6fa7814 | 27 | ptrdiff_t line_size); |
2ba45a60 | 28 | void add_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels, |
f6fa7814 | 29 | ptrdiff_t line_size); |
2ba45a60 DM |
30 | |
31 | void (*put_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels, | |
f6fa7814 | 32 | ptrdiff_t line_size); |
2ba45a60 | 33 | void (*add_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels, |
f6fa7814 | 34 | ptrdiff_t line_size); |
2ba45a60 DM |
35 | |
36 | #if 0 | |
37 | /* These functions were the base for the optimized assembler routines, | |
38 | and remain here for documentation purposes. */ | |
39 | static void put_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels, | |
40 | ptrdiff_t line_size) | |
41 | { | |
42 | int i = 8; | |
43 | uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */ | |
44 | ||
45 | do { | |
46 | uint64_t shorts0, shorts1; | |
47 | ||
48 | shorts0 = ldq(block); | |
49 | shorts0 = maxsw4(shorts0, 0); | |
50 | shorts0 = minsw4(shorts0, clampmask); | |
51 | stl(pkwb(shorts0), pixels); | |
52 | ||
53 | shorts1 = ldq(block + 4); | |
54 | shorts1 = maxsw4(shorts1, 0); | |
55 | shorts1 = minsw4(shorts1, clampmask); | |
56 | stl(pkwb(shorts1), pixels + 4); | |
57 | ||
58 | pixels += line_size; | |
59 | block += 8; | |
60 | } while (--i); | |
61 | } | |
62 | ||
63 | void add_pixels_clamped_mvi(const int16_t *block, uint8_t *pixels, | |
64 | ptrdiff_t line_size) | |
65 | { | |
66 | int h = 8; | |
67 | /* Keep this function a leaf function by generating the constants | |
68 | manually (mainly for the hack value ;-). */ | |
69 | uint64_t clampmask = zap(-1, 0xaa); /* 0x00ff00ff00ff00ff */ | |
70 | uint64_t signmask = zap(-1, 0x33); | |
71 | signmask ^= signmask >> 1; /* 0x8000800080008000 */ | |
72 | ||
73 | do { | |
74 | uint64_t shorts0, pix0, signs0; | |
75 | uint64_t shorts1, pix1, signs1; | |
76 | ||
77 | shorts0 = ldq(block); | |
78 | shorts1 = ldq(block + 4); | |
79 | ||
80 | pix0 = unpkbw(ldl(pixels)); | |
81 | /* Signed subword add (MMX paddw). */ | |
82 | signs0 = shorts0 & signmask; | |
83 | shorts0 &= ~signmask; | |
84 | shorts0 += pix0; | |
85 | shorts0 ^= signs0; | |
86 | /* Clamp. */ | |
87 | shorts0 = maxsw4(shorts0, 0); | |
88 | shorts0 = minsw4(shorts0, clampmask); | |
89 | ||
90 | /* Next 4. */ | |
91 | pix1 = unpkbw(ldl(pixels + 4)); | |
92 | signs1 = shorts1 & signmask; | |
93 | shorts1 &= ~signmask; | |
94 | shorts1 += pix1; | |
95 | shorts1 ^= signs1; | |
96 | shorts1 = maxsw4(shorts1, 0); | |
97 | shorts1 = minsw4(shorts1, clampmask); | |
98 | ||
99 | stl(pkwb(shorts0), pixels); | |
100 | stl(pkwb(shorts1), pixels + 4); | |
101 | ||
102 | pixels += line_size; | |
103 | block += 8; | |
104 | } while (--h); | |
105 | } | |
106 | #endif | |
107 | ||
108 | av_cold void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx, | |
109 | unsigned high_bit_depth) | |
110 | { | |
111 | /* amask clears all bits that correspond to present features. */ | |
112 | if (amask(AMASK_MVI) == 0) { | |
113 | c->put_pixels_clamped = put_pixels_clamped_mvi_asm; | |
114 | c->add_pixels_clamped = add_pixels_clamped_mvi_asm; | |
115 | } | |
116 | ||
117 | put_pixels_clamped_axp_p = c->put_pixels_clamped; | |
118 | add_pixels_clamped_axp_p = c->add_pixels_clamped; | |
119 | ||
120 | if (!high_bit_depth && !avctx->lowres && | |
121 | (avctx->idct_algo == FF_IDCT_AUTO || | |
122 | avctx->idct_algo == FF_IDCT_SIMPLEALPHA)) { | |
123 | c->idct_put = ff_simple_idct_put_axp; | |
124 | c->idct_add = ff_simple_idct_add_axp; | |
125 | c->idct = ff_simple_idct_axp; | |
126 | } | |
127 | } |