1cabdff1aSopenharmony_ci/* 2cabdff1aSopenharmony_ci * Copyright (c) 2011 Mans Rullgard <mans@mansr.com> 3cabdff1aSopenharmony_ci * 4cabdff1aSopenharmony_ci * This file is part of FFmpeg. 5cabdff1aSopenharmony_ci * 6cabdff1aSopenharmony_ci * FFmpeg is free software; you can redistribute it and/or 7cabdff1aSopenharmony_ci * modify it under the terms of the GNU Lesser General Public 8cabdff1aSopenharmony_ci * License as published by the Free Software Foundation; either 9cabdff1aSopenharmony_ci * version 2.1 of the License, or (at your option) any later version. 10cabdff1aSopenharmony_ci * 11cabdff1aSopenharmony_ci * FFmpeg is distributed in the hope that it will be useful, 12cabdff1aSopenharmony_ci * but WITHOUT ANY WARRANTY; without even the implied warranty of 13cabdff1aSopenharmony_ci * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14cabdff1aSopenharmony_ci * Lesser General Public License for more details. 15cabdff1aSopenharmony_ci * 16cabdff1aSopenharmony_ci * You should have received a copy of the GNU Lesser General Public 17cabdff1aSopenharmony_ci * License along with FFmpeg; if not, write to the Free Software 18cabdff1aSopenharmony_ci * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19cabdff1aSopenharmony_ci */ 20cabdff1aSopenharmony_ci 21cabdff1aSopenharmony_ci#include "libavutil/arm/asm.S" 22cabdff1aSopenharmony_ci 23cabdff1aSopenharmony_cifunction ff_ac3_bit_alloc_calc_bap_armv6, export=1 24cabdff1aSopenharmony_ci ldr r12, [sp] 25cabdff1aSopenharmony_ci cmp r12, #-960 26cabdff1aSopenharmony_ci beq 4f 27cabdff1aSopenharmony_ci push {r4-r11,lr} 28cabdff1aSopenharmony_ci add r5, sp, #40 29cabdff1aSopenharmony_ci movrelx r4, X(ff_ac3_bin_to_band_tab), r11 30cabdff1aSopenharmony_ci movrelx lr, X(ff_ac3_band_start_tab) 31cabdff1aSopenharmony_ci ldm r5, {r5-r7} 32cabdff1aSopenharmony_ci ldrb r4, [r4, r2] 33cabdff1aSopenharmony_ci add r1, r1, r2, lsl #1 @ psd + start 34cabdff1aSopenharmony_ci add r0, r0, r4, lsl #1 @ mask + band 35cabdff1aSopenharmony_ci add r4, r4, lr 36cabdff1aSopenharmony_ci add r7, r7, r2 @ bap + start 37cabdff1aSopenharmony_ci1: 38cabdff1aSopenharmony_ci ldrsh r9, [r0], #2 @ mask[band] 39cabdff1aSopenharmony_ci mov r8, #0xff0 40cabdff1aSopenharmony_ci sub r9, r9, r12 @ - snr_offset 41cabdff1aSopenharmony_ci ldrb r10, [r4, #1]! @ band_start_tab[++band] 42cabdff1aSopenharmony_ci subs r9, r9, r5 @ - floor 43cabdff1aSopenharmony_ci it lt 44cabdff1aSopenharmony_ci movlt r9, #0 45cabdff1aSopenharmony_ci cmp r10, r3 @ - end 46cabdff1aSopenharmony_ci and r9, r9, r8, lsl #1 @ & 0x1fe0 47cabdff1aSopenharmony_ci ite gt 48cabdff1aSopenharmony_ci subgt r8, r3, r2 49cabdff1aSopenharmony_ci suble r8, r10, r2 50cabdff1aSopenharmony_ci mov r2, r10 51cabdff1aSopenharmony_ci add r9, r9, r5 @ + floor => m 52cabdff1aSopenharmony_ci tst r8, #1 53cabdff1aSopenharmony_ci add r11, r7, r8 54cabdff1aSopenharmony_ci bne 3f 55cabdff1aSopenharmony_ci b 5f 56cabdff1aSopenharmony_ci2: 57cabdff1aSopenharmony_ci ldrsh r8, [r1], #2 58cabdff1aSopenharmony_ci ldrsh lr, [r1], #2 59cabdff1aSopenharmony_ci sub r8, r8, r9 60cabdff1aSopenharmony_ci sub lr, lr, r9 61cabdff1aSopenharmony_ci usat r8, #6, r8, asr #5 @ address 62cabdff1aSopenharmony_ci usat lr, #6, lr, asr #5 63cabdff1aSopenharmony_ci ldrb r8, [r6, r8] @ bap_tab[address] 64cabdff1aSopenharmony_ci ldrb lr, [r6, lr] 65cabdff1aSopenharmony_ci strb r8, [r7], #1 @ bap[bin] 66cabdff1aSopenharmony_ci strb lr, [r7], #1 67cabdff1aSopenharmony_ci5: cmp r7, r11 68cabdff1aSopenharmony_ci blo 2b 69cabdff1aSopenharmony_ci cmp r3, r10 70cabdff1aSopenharmony_ci bgt 1b 71cabdff1aSopenharmony_ci pop {r4-r11,pc} 72cabdff1aSopenharmony_ci3: 73cabdff1aSopenharmony_ci ldrsh r8, [r1], #2 @ psd[bin] 74cabdff1aSopenharmony_ci sub r8, r8, r9 @ - m 75cabdff1aSopenharmony_ci usat r8, #6, r8, asr #5 @ address 76cabdff1aSopenharmony_ci ldrb r8, [r6, r8] @ bap_tab[address] 77cabdff1aSopenharmony_ci strb r8, [r7], #1 @ bap[bin] 78cabdff1aSopenharmony_ci b 5b 79cabdff1aSopenharmony_ci4: 80cabdff1aSopenharmony_ci ldr r0, [sp, #12] 81cabdff1aSopenharmony_ci mov r1, #0 82cabdff1aSopenharmony_ci mov r2, #256 83cabdff1aSopenharmony_ci b X(memset) 84cabdff1aSopenharmony_ciendfunc 85