2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
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.
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.
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
24 * H.264 / AVC / MPEG4 part10 codec.
25 * non-MMX i386-specific optimizations for H.264
26 * @author Michael Niedermayer <michaelni@gmx.at>
29 #ifndef AVCODEC_X86_H264_I386_H
30 #define AVCODEC_X86_H264_I386_H
34 #include "libavcodec/cabac.h"
45 //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
46 //as that would make optimization work hard)
47 #if HAVE_7REGS && !BROKEN_COMPILER
48 #define decode_significance decode_significance_x86
49 static int decode_significance_x86(CABACContext *c, int max_coeff,
50 uint8_t *significant_coeff_ctx_base,
51 int *index, x86_reg last_off){
52 void *end= significant_coeff_ctx_base + max_coeff - 1;
53 int minusstart= -(intptr_t)significant_coeff_ctx_base;
54 int minusindex= 4-(intptr_t)index;
58 #ifdef BROKEN_RELOCATIONS
62 "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
64 : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
71 BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
72 "%5", "%q5", "%k0", "%b0",
73 "%c11(%6)", "%c12(%6)",
74 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
75 AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
76 AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
83 BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
84 "%5", "%q5", "%k0", "%b0",
85 "%c11(%6)", "%c12(%6)",
86 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
87 AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
88 AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
94 "add %1, %%"REG_c" \n\t"
95 "movl %%ecx, (%0) \n\t"
100 "add"OPSIZE" $4, %2 \n\t"
107 "movl %7, %%ecx \n\t"
108 "add %1, %%"REG_c" \n\t"
109 "movl %%ecx, (%0) \n\t"
113 : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
114 "+&r"(c->low), "=&r"(bit), "+&r"(c->range)
115 : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off),
116 "i"(offsetof(CABACContext, bytestream)),
117 "i"(offsetof(CABACContext, bytestream_end))
124 #define decode_significance_8x8 decode_significance_8x8_x86
125 static int decode_significance_8x8_x86(CABACContext *c,
126 uint8_t *significant_coeff_ctx_base,
127 int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){
128 int minusindex= 4-(intptr_t)index;
134 #ifdef BROKEN_RELOCATIONS
138 "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t"
140 : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables)
149 "movzb (%0, %6), %6 \n\t"
152 BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
153 "%5", "%q5", "%k0", "%b0",
154 "%c12(%7)", "%c13(%7)",
155 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
156 AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
157 AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
164 #ifdef BROKEN_RELOCATIONS
165 "movzb %c14(%15, %q6), %6\n\t"
167 "movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\n\t"
171 BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
172 "%5", "%q5", "%k0", "%b0",
173 "%c12(%7)", "%c13(%7)",
174 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET),
175 AV_STRINGIFY(H264_LPS_RANGE_OFFSET),
176 AV_STRINGIFY(H264_MLPS_STATE_OFFSET),
186 "add"OPSIZE" $4, %2 \n\t"
198 : "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low),
199 "=&r"(bit), "+&r"(c->range), "=&r"(state)
200 : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base),
201 REG64(sig_off), REG64(last_coeff_ctx_base),
202 "i"(offsetof(CABACContext, bytestream)),
203 "i"(offsetof(CABACContext, bytestream_end)),
204 "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG
209 #endif /* HAVE_7REGS && BROKEN_COMPILER */
211 #endif /* HAVE_INLINE_ASM */
212 #endif /* AVCODEC_X86_H264_I386_H */