| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder | ||
| 3 | * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> | ||
| 4 | * | ||
| 5 | * This file is part of FFmpeg. | ||
| 6 | * | ||
| 7 | * FFmpeg is free software; you can redistribute it and/or | ||
| 8 | * modify it under the terms of the GNU Lesser General Public | ||
| 9 | * License as published by the Free Software Foundation; either | ||
| 10 | * version 2.1 of the License, or (at your option) any later version. | ||
| 11 | * | ||
| 12 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 15 | * Lesser General Public License for more details. | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU Lesser General Public | ||
| 18 | * License along with FFmpeg; if not, write to the Free Software | ||
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 20 | */ | ||
| 21 | |||
| 22 | /** | ||
| 23 | * @file | ||
| 24 | * H.264 / AVC / MPEG-4 part10 codec. | ||
| 25 | * non-SIMD x86-specific optimizations for H.264 | ||
| 26 | * @author Michael Niedermayer <michaelni@gmx.at> | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include <stddef.h> | ||
| 30 | |||
| 31 | #include "libavcodec/cabac.h" | ||
| 32 | #include "cabac.h" | ||
| 33 | |||
| 34 | #if HAVE_INLINE_ASM | ||
| 35 | |||
| 36 | #if ARCH_X86_64 | ||
| 37 | #define REG64 "r" | ||
| 38 | #else | ||
| 39 | #define REG64 "m" | ||
| 40 | #endif | ||
| 41 | |||
| 42 | //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet | ||
| 43 | //as that would make optimization work hard) | ||
| 44 | #if HAVE_7REGS && !BROKEN_COMPILER | ||
| 45 | #define decode_significance decode_significance_x86 | ||
| 46 | 40122044 | static int decode_significance_x86(CABACContext *c, int max_coeff, | |
| 47 | uint8_t *significant_coeff_ctx_base, | ||
| 48 | int *index, x86_reg last_off){ | ||
| 49 | 40122044 | void *end= significant_coeff_ctx_base + max_coeff - 1; | |
| 50 | 40122044 | int minusstart= -(intptr_t)significant_coeff_ctx_base; | |
| 51 | 40122044 | int minusindex= 4-(intptr_t)index; | |
| 52 | int bit; | ||
| 53 | x86_reg coeff_count; | ||
| 54 | |||
| 55 | #ifdef BROKEN_RELOCATIONS | ||
| 56 | void *tables; | ||
| 57 | |||
| 58 | 40122044 | __asm__ volatile( | |
| 59 | "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t" | ||
| 60 | : "=&r"(tables) | ||
| 61 | : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables) | ||
| 62 | ); | ||
| 63 | #endif | ||
| 64 | |||
| 65 | 40122044 | __asm__ volatile( | |
| 66 | "3: \n\t" | ||
| 67 | |||
| 68 | BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3", | ||
| 69 | "%5", "%q5", "%k0", "%b0", | ||
| 70 | "%c11(%6)", "%c12(%6)", | ||
| 71 | AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), | ||
| 72 | AV_STRINGIFY(H264_LPS_RANGE_OFFSET), | ||
| 73 | AV_STRINGIFY(H264_MLPS_STATE_OFFSET), | ||
| 74 | "%13") | ||
| 75 | |||
| 76 | "test $1, %4 \n\t" | ||
| 77 | " jz 4f \n\t" | ||
| 78 | "add %10, %1 \n\t" | ||
| 79 | |||
| 80 | BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3", | ||
| 81 | "%5", "%q5", "%k0", "%b0", | ||
| 82 | "%c11(%6)", "%c12(%6)", | ||
| 83 | AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), | ||
| 84 | AV_STRINGIFY(H264_LPS_RANGE_OFFSET), | ||
| 85 | AV_STRINGIFY(H264_MLPS_STATE_OFFSET), | ||
| 86 | "%13") | ||
| 87 | |||
| 88 | "sub %10, %1 \n\t" | ||
| 89 | "mov %2, %0 \n\t" | ||
| 90 | "movl %7, %%ecx \n\t" | ||
| 91 | "add %1, %%"FF_REG_c" \n\t" | ||
| 92 | "movl %%ecx, (%0) \n\t" | ||
| 93 | |||
| 94 | "test $1, %4 \n\t" | ||
| 95 | " jnz 5f \n\t" | ||
| 96 | |||
| 97 | "add"FF_OPSIZE" $4, %2 \n\t" | ||
| 98 | |||
| 99 | "4: \n\t" | ||
| 100 | "add $1, %1 \n\t" | ||
| 101 | "cmp %8, %1 \n\t" | ||
| 102 | " jb 3b \n\t" | ||
| 103 | "mov %2, %0 \n\t" | ||
| 104 | "movl %7, %%ecx \n\t" | ||
| 105 | "add %1, %%"FF_REG_c" \n\t" | ||
| 106 | "movl %%ecx, (%0) \n\t" | ||
| 107 | "5: \n\t" | ||
| 108 | "add %9, %k0 \n\t" | ||
| 109 | "shr $2, %k0 \n\t" | ||
| 110 | : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index), | ||
| 111 | 40122044 | "+&r"(c->low), "=&r"(bit), "+&r"(c->range) | |
| 112 | : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off), | ||
| 113 | "i"(offsetof(CABACContext, bytestream)), | ||
| 114 | "i"(offsetof(CABACContext, bytestream_end)) | ||
| 115 | TABLES_ARG | ||
| 116 | : "%"FF_REG_c, "memory" | ||
| 117 | ); | ||
| 118 | 40122044 | return coeff_count; | |
| 119 | } | ||
| 120 | |||
| 121 | #define decode_significance_8x8 decode_significance_8x8_x86 | ||
| 122 | 5462822 | static int decode_significance_8x8_x86(CABACContext *c, | |
| 123 | uint8_t *significant_coeff_ctx_base, | ||
| 124 | int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){ | ||
| 125 | 5462822 | int minusindex= 4-(intptr_t)index; | |
| 126 | int bit; | ||
| 127 | x86_reg coeff_count; | ||
| 128 | 5462822 | x86_reg last=0; | |
| 129 | x86_reg state; | ||
| 130 | |||
| 131 | #ifdef BROKEN_RELOCATIONS | ||
| 132 | void *tables; | ||
| 133 | |||
| 134 | 5462822 | __asm__ volatile( | |
| 135 | "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t" | ||
| 136 | : "=&r"(tables) | ||
| 137 | : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables) | ||
| 138 | ); | ||
| 139 | #endif | ||
| 140 | |||
| 141 | 5462822 | __asm__ volatile( | |
| 142 | "mov %1, %6 \n\t" | ||
| 143 | "3: \n\t" | ||
| 144 | |||
| 145 | "mov %10, %0 \n\t" | ||
| 146 | "movzb (%0, %6), %6 \n\t" | ||
| 147 | "add %9, %6 \n\t" | ||
| 148 | |||
| 149 | BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3", | ||
| 150 | "%5", "%q5", "%k0", "%b0", | ||
| 151 | "%c12(%7)", "%c13(%7)", | ||
| 152 | AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), | ||
| 153 | AV_STRINGIFY(H264_LPS_RANGE_OFFSET), | ||
| 154 | AV_STRINGIFY(H264_MLPS_STATE_OFFSET), | ||
| 155 | "%15") | ||
| 156 | |||
| 157 | "mov %1, %6 \n\t" | ||
| 158 | "test $1, %4 \n\t" | ||
| 159 | " jz 4f \n\t" | ||
| 160 | |||
| 161 | #ifdef BROKEN_RELOCATIONS | ||
| 162 | "movzb %c14(%15, %q6), %6\n\t" | ||
| 163 | #else | ||
| 164 | "movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\n\t" | ||
| 165 | #endif | ||
| 166 | "add %11, %6 \n\t" | ||
| 167 | |||
| 168 | BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3", | ||
| 169 | "%5", "%q5", "%k0", "%b0", | ||
| 170 | "%c12(%7)", "%c13(%7)", | ||
| 171 | AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), | ||
| 172 | AV_STRINGIFY(H264_LPS_RANGE_OFFSET), | ||
| 173 | AV_STRINGIFY(H264_MLPS_STATE_OFFSET), | ||
| 174 | "%15") | ||
| 175 | |||
| 176 | "mov %2, %0 \n\t" | ||
| 177 | "mov %1, %6 \n\t" | ||
| 178 | "mov %k6, (%0) \n\t" | ||
| 179 | |||
| 180 | "test $1, %4 \n\t" | ||
| 181 | " jnz 5f \n\t" | ||
| 182 | |||
| 183 | "add"FF_OPSIZE" $4, %2 \n\t" | ||
| 184 | |||
| 185 | "4: \n\t" | ||
| 186 | "add $1, %6 \n\t" | ||
| 187 | "mov %6, %1 \n\t" | ||
| 188 | "cmp $63, %6 \n\t" | ||
| 189 | " jb 3b \n\t" | ||
| 190 | "mov %2, %0 \n\t" | ||
| 191 | "mov %k6, (%0) \n\t" | ||
| 192 | "5: \n\t" | ||
| 193 | "addl %8, %k0 \n\t" | ||
| 194 | "shr $2, %k0 \n\t" | ||
| 195 | 5462822 | : "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low), | |
| 196 | 5462822 | "=&r"(bit), "+&r"(c->range), "=&r"(state) | |
| 197 | : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), | ||
| 198 | REG64(sig_off), REG64(last_coeff_ctx_base), | ||
| 199 | "i"(offsetof(CABACContext, bytestream)), | ||
| 200 | "i"(offsetof(CABACContext, bytestream_end)), | ||
| 201 | "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG | ||
| 202 | : "%"FF_REG_c, "memory" | ||
| 203 | ); | ||
| 204 | 5462822 | return coeff_count; | |
| 205 | } | ||
| 206 | #endif /* HAVE_7REGS && BROKEN_COMPILER */ | ||
| 207 | |||
| 208 | #endif /* HAVE_INLINE_ASM */ | ||
| 209 |