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Diffstat (limited to 'libavcodec/x86/h264_i386.h')
| -rw-r--r-- | libavcodec/x86/h264_i386.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/libavcodec/x86/h264_i386.h b/libavcodec/x86/h264_i386.h new file mode 100644 index 0000000000..909c27490d --- /dev/null +++ b/libavcodec/x86/h264_i386.h @@ -0,0 +1,155 @@ +/* + * 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 h264_i386.h + * H.264 / AVC / MPEG4 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 "libavcodec/cabac.h" + +//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet +//as that would make optimization work hard) +#if defined(ARCH_X86) && defined(HAVE_7REGS) && \ + defined(HAVE_EBX_AVAILABLE) && \ + !defined(BROKEN_RELOCATIONS) +static int decode_significance_x86(CABACContext *c, int max_coeff, + uint8_t *significant_coeff_ctx_base, + int *index){ + void *end= significant_coeff_ctx_base + max_coeff - 1; + int minusstart= -(int)significant_coeff_ctx_base; + int minusindex= 4-(int)index; + int coeff_count; + __asm__ volatile( + "movl "RANGE "(%3), %%esi \n\t" + "movl "LOW "(%3), %%ebx \n\t" + + "2: \n\t" + + BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx", + "%%bx", "%%esi", "%%eax", "%%al") + + "test $1, %%edx \n\t" + " jz 3f \n\t" + + BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", + "%%bx", "%%esi", "%%eax", "%%al") + + "mov %2, %%"REG_a" \n\t" + "movl %4, %%ecx \n\t" + "add %1, %%"REG_c" \n\t" + "movl %%ecx, (%%"REG_a") \n\t" + + "test $1, %%edx \n\t" + " jnz 4f \n\t" + + "add $4, %%"REG_a" \n\t" + "mov %%"REG_a", %2 \n\t" + + "3: \n\t" + "add $1, %1 \n\t" + "cmp %5, %1 \n\t" + " jb 2b \n\t" + "mov %2, %%"REG_a" \n\t" + "movl %4, %%ecx \n\t" + "add %1, %%"REG_c" \n\t" + "movl %%ecx, (%%"REG_a") \n\t" + "4: \n\t" + "add %6, %%eax \n\t" + "shr $2, %%eax \n\t" + + "movl %%esi, "RANGE "(%3) \n\t" + "movl %%ebx, "LOW "(%3) \n\t" + :"=&a"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index) + :"r"(c), "m"(minusstart), "m"(end), "m"(minusindex) + : "%"REG_c, "%ebx", "%edx", "%esi", "memory" + ); + return coeff_count; +} + +static int decode_significance_8x8_x86(CABACContext *c, + uint8_t *significant_coeff_ctx_base, + int *index, const uint8_t *sig_off){ + int minusindex= 4-(int)index; + int coeff_count; + x86_reg last=0; + __asm__ volatile( + "movl "RANGE "(%3), %%esi \n\t" + "movl "LOW "(%3), %%ebx \n\t" + + "mov %1, %%"REG_D" \n\t" + "2: \n\t" + + "mov %6, %%"REG_a" \n\t" + "movzbl (%%"REG_a", %%"REG_D"), %%edi \n\t" + "add %5, %%"REG_D" \n\t" + + BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%"REG_D")", "%%ebx", + "%%bx", "%%esi", "%%eax", "%%al") + + "mov %1, %%edi \n\t" + "test $1, %%edx \n\t" + " jz 3f \n\t" + + "movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t" + "add %5, %%"REG_D" \n\t" + + BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx", + "%%bx", "%%esi", "%%eax", "%%al") + + "mov %2, %%"REG_a" \n\t" + "mov %1, %%edi \n\t" + "movl %%edi, (%%"REG_a") \n\t" + + "test $1, %%edx \n\t" + " jnz 4f \n\t" + + "add $4, %%"REG_a" \n\t" + "mov %%"REG_a", %2 \n\t" + + "3: \n\t" + "addl $1, %%edi \n\t" + "mov %%edi, %1 \n\t" + "cmpl $63, %%edi \n\t" + " jb 2b \n\t" + "mov %2, %%"REG_a" \n\t" + "movl %%edi, (%%"REG_a") \n\t" + "4: \n\t" + "addl %4, %%eax \n\t" + "shr $2, %%eax \n\t" + + "movl %%esi, "RANGE "(%3) \n\t" + "movl %%ebx, "LOW "(%3) \n\t" + :"=&a"(coeff_count),"+m"(last), "+m"(index) + :"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off) + : "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory" + ); + return coeff_count; +} +#endif /* defined(ARCH_X86) && defined(HAVE_7REGS) && */ + /* defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */ + +#endif /* AVCODEC_X86_H264_I386_H */ |