diff options
Diffstat (limited to 'media/ffvpx/libavcodec/x86/h264_i386.h')
-rw-r--r-- | media/ffvpx/libavcodec/x86/h264_i386.h | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/media/ffvpx/libavcodec/x86/h264_i386.h b/media/ffvpx/libavcodec/x86/h264_i386.h new file mode 100644 index 000000000..4dfbc3093 --- /dev/null +++ b/media/ffvpx/libavcodec/x86/h264_i386.h @@ -0,0 +1,212 @@ +/* + * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder + * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +/** + * @file + * H.264 / AVC / MPEG-4 part10 codec. + * non-MMX i386-specific optimizations for H.264 + * @author Michael Niedermayer <michaelni@gmx.at> + */ + +#ifndef AVCODEC_X86_H264_I386_H +#define AVCODEC_X86_H264_I386_H + +#include <stddef.h> + +#include "libavcodec/cabac.h" +#include "cabac.h" + +#if HAVE_INLINE_ASM + +#if ARCH_X86_64 +#define REG64 "r" +#else +#define REG64 "m" +#endif + +//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet +//as that would make optimization work hard) +#if HAVE_7REGS && !BROKEN_COMPILER +#define decode_significance decode_significance_x86 +static int decode_significance_x86(CABACContext *c, int max_coeff, + uint8_t *significant_coeff_ctx_base, + int *index, x86_reg last_off){ + void *end= significant_coeff_ctx_base + max_coeff - 1; + int minusstart= -(intptr_t)significant_coeff_ctx_base; + int minusindex= 4-(intptr_t)index; + int bit; + x86_reg coeff_count; + +#ifdef BROKEN_RELOCATIONS + void *tables; + + __asm__ volatile( + "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t" + : "=&r"(tables) + : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables) + ); +#endif + + __asm__ volatile( + "3: \n\t" + + BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3", + "%5", "%q5", "%k0", "%b0", + "%c11(%6)", "%c12(%6)", + AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), + AV_STRINGIFY(H264_LPS_RANGE_OFFSET), + AV_STRINGIFY(H264_MLPS_STATE_OFFSET), + "%13") + + "test $1, %4 \n\t" + " jz 4f \n\t" + "add %10, %1 \n\t" + + BRANCHLESS_GET_CABAC("%4", "%q4", "(%1)", "%3", "%w3", + "%5", "%q5", "%k0", "%b0", + "%c11(%6)", "%c12(%6)", + AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), + AV_STRINGIFY(H264_LPS_RANGE_OFFSET), + AV_STRINGIFY(H264_MLPS_STATE_OFFSET), + "%13") + + "sub %10, %1 \n\t" + "mov %2, %0 \n\t" + "movl %7, %%ecx \n\t" + "add %1, %%"REG_c" \n\t" + "movl %%ecx, (%0) \n\t" + + "test $1, %4 \n\t" + " jnz 5f \n\t" + + "add"OPSIZE" $4, %2 \n\t" + + "4: \n\t" + "add $1, %1 \n\t" + "cmp %8, %1 \n\t" + " jb 3b \n\t" + "mov %2, %0 \n\t" + "movl %7, %%ecx \n\t" + "add %1, %%"REG_c" \n\t" + "movl %%ecx, (%0) \n\t" + "5: \n\t" + "add %9, %k0 \n\t" + "shr $2, %k0 \n\t" + : "=&q"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index), + "+&r"(c->low), "=&r"(bit), "+&r"(c->range) + : "r"(c), "m"(minusstart), "m"(end), "m"(minusindex), "m"(last_off), + "i"(offsetof(CABACContext, bytestream)), + "i"(offsetof(CABACContext, bytestream_end)) + TABLES_ARG + : "%"REG_c, "memory" + ); + return coeff_count; +} + +#define decode_significance_8x8 decode_significance_8x8_x86 +static int decode_significance_8x8_x86(CABACContext *c, + uint8_t *significant_coeff_ctx_base, + int *index, uint8_t *last_coeff_ctx_base, const uint8_t *sig_off){ + int minusindex= 4-(intptr_t)index; + int bit; + x86_reg coeff_count; + x86_reg last=0; + x86_reg state; + +#ifdef BROKEN_RELOCATIONS + void *tables; + + __asm__ volatile( + "lea "MANGLE(ff_h264_cabac_tables)", %0 \n\t" + : "=&r"(tables) + : NAMED_CONSTRAINTS_ARRAY(ff_h264_cabac_tables) + ); +#endif + + __asm__ volatile( + "mov %1, %6 \n\t" + "3: \n\t" + + "mov %10, %0 \n\t" + "movzb (%0, %6), %6 \n\t" + "add %9, %6 \n\t" + + BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3", + "%5", "%q5", "%k0", "%b0", + "%c12(%7)", "%c13(%7)", + AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), + AV_STRINGIFY(H264_LPS_RANGE_OFFSET), + AV_STRINGIFY(H264_MLPS_STATE_OFFSET), + "%15") + + "mov %1, %6 \n\t" + "test $1, %4 \n\t" + " jz 4f \n\t" + +#ifdef BROKEN_RELOCATIONS + "movzb %c14(%15, %q6), %6\n\t" +#else + "movzb "MANGLE(ff_h264_cabac_tables)"+%c14(%6), %6\n\t" +#endif + "add %11, %6 \n\t" + + BRANCHLESS_GET_CABAC("%4", "%q4", "(%6)", "%3", "%w3", + "%5", "%q5", "%k0", "%b0", + "%c12(%7)", "%c13(%7)", + AV_STRINGIFY(H264_NORM_SHIFT_OFFSET), + AV_STRINGIFY(H264_LPS_RANGE_OFFSET), + AV_STRINGIFY(H264_MLPS_STATE_OFFSET), + "%15") + + "mov %2, %0 \n\t" + "mov %1, %6 \n\t" + "mov %k6, (%0) \n\t" + + "test $1, %4 \n\t" + " jnz 5f \n\t" + + "add"OPSIZE" $4, %2 \n\t" + + "4: \n\t" + "add $1, %6 \n\t" + "mov %6, %1 \n\t" + "cmp $63, %6 \n\t" + " jb 3b \n\t" + "mov %2, %0 \n\t" + "mov %k6, (%0) \n\t" + "5: \n\t" + "addl %8, %k0 \n\t" + "shr $2, %k0 \n\t" + : "=&q"(coeff_count), "+"REG64(last), "+"REG64(index), "+&r"(c->low), + "=&r"(bit), "+&r"(c->range), "=&r"(state) + : "r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), + REG64(sig_off), REG64(last_coeff_ctx_base), + "i"(offsetof(CABACContext, bytestream)), + "i"(offsetof(CABACContext, bytestream_end)), + "i"(H264_LAST_COEFF_FLAG_OFFSET_8x8_OFFSET) TABLES_ARG + : "%"REG_c, "memory" + ); + return coeff_count; +} +#endif /* HAVE_7REGS && BROKEN_COMPILER */ + +#endif /* HAVE_INLINE_ASM */ +#endif /* AVCODEC_X86_H264_I386_H */ |