| 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, |
| 27 | ptrdiff_t line_size); |
| 28 | void add_pixels_clamped_mvi_asm(const int16_t *block, uint8_t *pixels, |
| 29 | ptrdiff_t line_size); |
| 30 | |
| 31 | void (*put_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels, |
| 32 | ptrdiff_t line_size); |
| 33 | void (*add_pixels_clamped_axp_p)(const int16_t *block, uint8_t *pixels, |
| 34 | ptrdiff_t line_size); |
| 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 | } |