| /* | |
| * Copyright (C) 2010 Mans Rullgard | |
| * | |
| * 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 | |
| */ | |
| #include "libavutil/arm/asm.S" | |
| .macro rac_get_prob h, bs, buf, cw, pr, t0, t1 | |
| adds \bs, \bs, \t0 | |
| lsl \cw, \cw, \t0 | |
| lsl \t0, \h, \t0 | |
| rsb \h, \pr, #256 | |
| it cs | |
| ldrhcs \t1, [\buf], #2 | |
| smlabb \h, \t0, \pr, \h | |
| T itttt cs | |
| rev16cs \t1, \t1 | |
| A orrcs \cw, \cw, \t1, lsl \bs | |
| T lslcs \t1, \t1, \bs | |
| T orrcs \cw, \cw, \t1 | |
| subcs \bs, \bs, #16 | |
| lsr \h, \h, #8 | |
| cmp \cw, \h, lsl #16 | |
| itt ge | |
| subge \cw, \cw, \h, lsl #16 | |
| subge \h, \t0, \h | |
| .endm | |
| .macro rac_get_128 h, bs, buf, cw, t0, t1 | |
| adds \bs, \bs, \t0 | |
| lsl \cw, \cw, \t0 | |
| lsl \t0, \h, \t0 | |
| it cs | |
| ldrhcs \t1, [\buf], #2 | |
| mov \h, #128 | |
| it cs | |
| rev16cs \t1, \t1 | |
| add \h, \h, \t0, lsl #7 | |
| A orrcs \cw, \cw, \t1, lsl \bs | |
| T ittt cs | |
| T lslcs \t1, \t1, \bs | |
| T orrcs \cw, \cw, \t1 | |
| subcs \bs, \bs, #16 | |
| lsr \h, \h, #8 | |
| cmp \cw, \h, lsl #16 | |
| itt ge | |
| subge \cw, \cw, \h, lsl #16 | |
| subge \h, \t0, \h | |
| .endm | |
| function ff_decode_block_coeffs_armv6, export=1 | |
| push {r0,r1,r4-r11,lr} | |
| movrelx lr, X(ff_vpx_norm_shift) | |
| ldrd r4, r5, [sp, #44] @ token_prob, qmul | |
| cmp r3, #0 | |
| ldr r11, [r5] | |
| ldm r0, {r5-r7} @ high, bits, buf | |
| it ne | |
| pkhtbne r11, r11, r11, asr #16 | |
| ldr r8, [r0, #16] @ code_word | |
| 0: | |
| ldrb r9, [lr, r5] | |
| add r3, r3, #1 | |
| ldrb r0, [r4, #1] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| blt 2f | |
| ldrb r9, [lr, r5] | |
| ldrb r0, [r4, #2] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| ldrb r9, [lr, r5] | |
| bge 3f | |
| add r4, r3, r3, lsl #5 | |
| sxth r12, r11 | |
| add r4, r4, r2 | |
| adds r6, r6, r9 | |
| add r4, r4, #11 | |
| lsl r8, r8, r9 | |
| it cs | |
| ldrhcs r10, [r7], #2 | |
| lsl r9, r5, r9 | |
| mov r5, #128 | |
| it cs | |
| rev16cs r10, r10 | |
| add r5, r5, r9, lsl #7 | |
| T ittt cs | |
| T lslcs r10, r10, r6 | |
| T orrcs r8, r8, r10 | |
| A orrcs r8, r8, r10, lsl r6 | |
| subcs r6, r6, #16 | |
| lsr r5, r5, #8 | |
| cmp r8, r5, lsl #16 | |
| movrel r10, zigzag_scan-1 | |
| itt ge | |
| subge r8, r8, r5, lsl #16 | |
| subge r5, r9, r5 | |
| ldrb r10, [r10, r3] | |
| it ge | |
| rsbge r12, r12, #0 | |
| cmp r3, #16 | |
| strh r12, [r1, r10] | |
| bge 6f | |
| 5: | |
| ldrb r9, [lr, r5] | |
| ldrb r0, [r4] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| pkhtb r11, r11, r11, asr #16 | |
| bge 0b | |
| 6: | |
| ldr r0, [sp] | |
| ldr r9, [r0, #12] | |
| cmp r7, r9 | |
| it hi | |
| movhi r7, r9 | |
| stm r0, {r5-r7} @ high, bits, buf | |
| str r8, [r0, #16] @ code_word | |
| add sp, sp, #8 | |
| mov r0, r3 | |
| pop {r4-r11,pc} | |
| 2: | |
| add r4, r3, r3, lsl #5 | |
| cmp r3, #16 | |
| add r4, r4, r2 | |
| pkhtb r11, r11, r11, asr #16 | |
| bne 0b | |
| b 6b | |
| 3: | |
| ldrb r0, [r4, #3] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| ldrb r9, [lr, r5] | |
| bge 1f | |
| mov r12, #2 | |
| ldrb r0, [r4, #4] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r12, #1 | |
| ldrb r9, [lr, r5] | |
| blt 4f | |
| ldrb r0, [r4, #5] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r12, #1 | |
| ldrb r9, [lr, r5] | |
| b 4f | |
| 1: | |
| ldrb r0, [r4, #6] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| ldrb r9, [lr, r5] | |
| bge 3f | |
| ldrb r0, [r4, #7] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| ldrb r9, [lr, r5] | |
| bge 2f | |
| mov r12, #5 | |
| mov r0, #159 | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r12, r12, #1 | |
| ldrb r9, [lr, r5] | |
| b 4f | |
| 2: | |
| mov r12, #7 | |
| mov r0, #165 | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r12, r12, #2 | |
| ldrb r9, [lr, r5] | |
| mov r0, #145 | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r12, r12, #1 | |
| ldrb r9, [lr, r5] | |
| b 4f | |
| 3: | |
| ldrb r0, [r4, #8] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| it ge | |
| addge r4, r4, #1 | |
| ldrb r9, [lr, r5] | |
| ite ge | |
| movge r12, #2 | |
| movlt r12, #0 | |
| ldrb r0, [r4, #9] | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| mov r9, #8 | |
| it ge | |
| addge r12, r12, #1 | |
| movrelx r4, X(ff_vp8_dct_cat_prob), r1 | |
| lsl r9, r9, r12 | |
| ldr r4, [r4, r12, lsl #2] | |
| add r12, r9, #3 | |
| mov r1, #0 | |
| ldrb r0, [r4], #1 | |
| 1: | |
| ldrb r9, [lr, r5] | |
| lsl r1, r1, #1 | |
| rac_get_prob r5, r6, r7, r8, r0, r9, r10 | |
| ldrb r0, [r4], #1 | |
| it ge | |
| addge r1, r1, #1 | |
| cmp r0, #0 | |
| bne 1b | |
| ldrb r9, [lr, r5] | |
| add r12, r12, r1 | |
| ldr r1, [sp, #4] | |
| 4: | |
| add r4, r3, r3, lsl #5 | |
| add r4, r4, r2 | |
| add r4, r4, #22 | |
| rac_get_128 r5, r6, r7, r8, r9, r10 | |
| it ge | |
| rsbge r12, r12, #0 | |
| smulbb r12, r12, r11 | |
| movrel r9, zigzag_scan-1 | |
| ldrb r9, [r9, r3] | |
| cmp r3, #16 | |
| strh r12, [r1, r9] | |
| bge 6b | |
| b 5b | |
| endfunc | |
| const zigzag_scan | |
| .byte 0, 2, 8, 16 | |
| .byte 10, 4, 6, 12 | |
| .byte 18, 24, 26, 20 | |
| .byte 14, 22, 28, 30 | |
| endconst |