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"
39 //FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
40 //as that would make optimization work hard)
41 #if HAVE_7REGS && !BROKEN_COMPILER
42 #define decode_significance decode_significance_x86
43 static int decode_significance_x86(CABACContext
*c
, int max_coeff
,
44 uint8_t *significant_coeff_ctx_base
,
45 int *index
, x86_reg last_off
){
46 void *end
= significant_coeff_ctx_base
+ max_coeff
- 1;
47 int minusstart
= -(intptr_t)significant_coeff_ctx_base
;
48 int minusindex
= 4-(intptr_t)index
;
52 #ifdef BROKEN_RELOCATIONS
56 "lea "MANGLE(ff_h264_cabac_tables
)", %0 \n\t"
58 : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables
)
65 BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
66 "%5", "%q5", "%k0", "%b0",
67 "%c11(%6)", "%c12(%6)",
68 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET
),
69 AV_STRINGIFY(H264_LPS_RANGE_OFFSET
),
70 AV_STRINGIFY(H264_MLPS_STATE_OFFSET
),
77 BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3",
78 "%5", "%q5", "%k0", "%b0",
79 "%c11(%6)", "%c12(%6)",
80 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET
),
81 AV_STRINGIFY(H264_LPS_RANGE_OFFSET
),
82 AV_STRINGIFY(H264_MLPS_STATE_OFFSET
),
88 "add %1, %%"REG_c
" \n\t"
89 "movl %%ecx, (%0) \n\t"
94 "add"OPSIZE
" $4, %2 \n\t"
101 "movl %7, %%ecx \n\t"
102 "add %1, %%"REG_c
" \n\t"
103 "movl %%ecx, (%0) \n\t"
107 : "=&q"(coeff_count
), "+r"(significant_coeff_ctx_base
), "+m"(index
),
108 "+&r"(c
->low
), "=&r"(bit
), "+&r"(c
->range
)
109 : "r"(c
), "m"(minusstart
), "m"(end
), "m"(minusindex
), "m"(last_off
),
110 "i"(offsetof(CABACContext
, bytestream
)),
111 "i"(offsetof(CABACContext
, bytestream_end
))
118 #define decode_significance_8x8 decode_significance_8x8_x86
119 static int decode_significance_8x8_x86(CABACContext
*c
,
120 uint8_t *significant_coeff_ctx_base
,
121 int *index
, uint8_t *last_coeff_ctx_base
, const uint8_t *sig_off
){
122 int minusindex
= 4-(intptr_t)index
;
128 #ifdef BROKEN_RELOCATIONS
132 "lea "MANGLE(ff_h264_cabac_tables
)", %0 \n\t"
134 : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables
)
143 "movzbl (%0, %6), %k6 \n\t"
146 BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
147 "%5", "%q5", "%k0", "%b0",
148 "%c12(%7)", "%c13(%7)",
149 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET
),
150 AV_STRINGIFY(H264_LPS_RANGE_OFFSET
),
151 AV_STRINGIFY(H264_MLPS_STATE_OFFSET
),
158 #ifdef BROKEN_RELOCATIONS
159 "movzbl %c14(%15, %q6), %k6\n\t"
161 "movzbl "MANGLE(ff_h264_cabac_tables
)"+%c14(%k6), %k6\n\t"
165 BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3",
166 "%5", "%q5", "%k0", "%b0",
167 "%c12(%7)", "%c13(%7)",
168 AV_STRINGIFY(H264_NORM_SHIFT_OFFSET
),
169 AV_STRINGIFY(H264_LPS_RANGE_OFFSET
),
170 AV_STRINGIFY(H264_MLPS_STATE_OFFSET
),
175 "movl %k6, (%0) \n\t"
180 "add"OPSIZE
" $4, %2 \n\t"
188 "movl %k6, (%0) \n\t"
192 : "=&q"(coeff_count
), "+m"(last
), "+m"(index
), "+&r"(c
->low
),
193 "=&r"(bit
), "+&r"(c
->range
), "=&r"(state
)
194 : "r"(c
), "m"(minusindex
), "m"(significant_coeff_ctx_base
),
195 "m"(sig_off
), "m"(last_coeff_ctx_base
),
196 "i"(offsetof(CABACContext
, bytestream
)),
197 "i"(offsetof(CABACContext
, bytestream_end
)),
198 "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET
) TABLES_ARG
203 #endif /* HAVE_7REGS && BROKEN_COMPILER */
205 #endif /* HAVE_INLINE_ASM */
206 #endif /* AVCODEC_X86_H264_I386_H */