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 Libav.
7 * Libav 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 * Libav 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 Libav; 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"
37 //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
38 //as that would make optimization work hard)
39 #if HAVE_7REGS && !defined(BROKEN_RELOCATIONS)
40 static int decode_significance_x86(CABACContext *c, int max_coeff,
41 uint8_t *significant_coeff_ctx_base,
42 int *index, x86_reg last_off){
43 void *end= significant_coeff_ctx_base + max_coeff - 1;
44 int minusstart= -(intptr_t)significant_coeff_ctx_base;
45 int minusindex= 4-(intptr_t)index;
51 BRANCHLESS_GET_CABAC("%4", "(%1)", "%3",
52 "%w3", "%5", "%k0", "%b0", "%6")
58 BRANCHLESS_GET_CABAC("%4", "(%1)", "%3",
59 "%w3", "%5", "%k0", "%b0", "%6")
64 "add %1, %%"REG_c" \n\t"
65 "movl %%ecx, (%0) \n\t"
70 "add"OPSIZE" $4, %2 \n\t"
78 "add %1, %%"REG_c" \n\t"
79 "movl %%ecx, (%0) \n\t"
83 :"=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index),
84 "+&r"(c->low), "=&r"(bit), "+&r"(c->range),
86 :"m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off)
92 static int decode_significance_8x8_x86(CABACContext *c,
93 uint8_t *significant_coeff_ctx_base,
94 int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){
95 int minusindex= 4-(intptr_t)index;
105 "movzbl (%0, %6), %k6 \n\t"
108 BRANCHLESS_GET_CABAC("%4", "(%6)", "%3",
109 "%w3", "%5", "%k0", "%b0", "%7")
115 "movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%k6), %k6\n\t"
118 BRANCHLESS_GET_CABAC("%4", "(%6)", "%3",
119 "%w3", "%5", "%k0", "%b0", "%7")
123 "movl %k6, (%0) \n\t"
128 "add"OPSIZE" $4, %2 \n\t"
136 "movl %k6, (%0) \n\t"
140 :"=&q"(coeff_count),"+m"(last), "+m"(index), "+&r"(c->low), "=&r"(bit),
141 "+&r"(c->range), "=&r"(state), "+m"(c->bytestream)
142 :"m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off), "m"(last_coeff_ctx_base)
147 #endif /* HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
149 #endif /* AVCODEC_X86_H264_I386_H */