|
|
|
|
/*
|
|
|
|
|
* Copyright (c) 2011 Mans Rullgard <mans@mansr.com>
|
|
|
|
|
*
|
|
|
|
|
* This file is part of Libav.
|
|
|
|
|
*
|
|
|
|
|
* Libav 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.
|
|
|
|
|
*
|
|
|
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
|
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#include "asm.S"
|
|
|
|
|
|
|
|
|
|
function ff_ac3_bit_alloc_calc_bap_armv6, export=1
|
|
|
|
|
ldr r12, [sp]
|
|
|
|
|
cmp r12, #-960
|
|
|
|
|
beq 4f
|
|
|
|
|
push {r4-r11,lr}
|
|
|
|
|
add r5, sp, #40
|
|
|
|
|
movrel r4, X(ff_ac3_bin_to_band_tab)
|
|
|
|
|
movrel lr, X(ff_ac3_band_start_tab)
|
|
|
|
|
ldm r5, {r5-r7}
|
|
|
|
|
ldrb r4, [r4, r2]
|
|
|
|
|
add r1, r1, r2, lsl #1 @ psd + start
|
|
|
|
|
add r0, r0, r4, lsl #1 @ mask + band
|
|
|
|
|
add r4, lr, r4
|
|
|
|
|
add r7, r7, r2 @ bap + start
|
|
|
|
|
ldrb r10, [r4], #1
|
|
|
|
|
1:
|
|
|
|
|
ldrsh r9, [r0], #2 @ mask[band]
|
|
|
|
|
movw r8, #0x1fe0
|
|
|
|
|
sub r9, r9, r12 @ - snr_offset
|
|
|
|
|
mov r11, r10
|
|
|
|
|
ldrb r10, [r4], #1 @ band_start_tab[band++]
|
|
|
|
|
subs r9, r9, r5 @ - floor
|
|
|
|
|
movlt r9, #0
|
|
|
|
|
cmp r10, r3 @ - end
|
|
|
|
|
and r9, r9, r8 @ & 0x1fe0
|
|
|
|
|
subgt r8, r3, r11
|
|
|
|
|
suble r8, r10, r11
|
|
|
|
|
add r9, r9, r5 @ + floor => m
|
|
|
|
|
tst r8, #1
|
|
|
|
|
add r2, r7, r8
|
|
|
|
|
bne 3f
|
|
|
|
|
b 5f
|
|
|
|
|
2:
|
|
|
|
|
ldrsh r8, [r1], #2
|
|
|
|
|
ldrsh lr, [r1], #2
|
|
|
|
|
sub r8, r8, r9
|
|
|
|
|
sub lr, lr, r9
|
|
|
|
|
usat r8, #6, r8, asr #5 @ address
|
|
|
|
|
usat lr, #6, lr, asr #5
|
|
|
|
|
ldrb r8, [r6, r8] @ bap_tab[address]
|
|
|
|
|
ldrb lr, [r6, lr]
|
|
|
|
|
strb r8, [r7], #1 @ bap[bin]
|
|
|
|
|
strb lr, [r7], #1
|
|
|
|
|
5: cmp r7, r2
|
|
|
|
|
blo 2b
|
|
|
|
|
cmp r3, r11
|
|
|
|
|
bgt 1b
|
|
|
|
|
pop {r4-r11,pc}
|
|
|
|
|
3:
|
|
|
|
|
ldrsh r8, [r1], #2 @ psd[bin]
|
|
|
|
|
sub r8, r8, r9 @ - m
|
|
|
|
|
usat r8, #6, r8, asr #5 @ address
|
|
|
|
|
ldrb r8, [r6, r8] @ bap_tab[address]
|
|
|
|
|
strb r8, [r7], #1 @ bap[bin]
|
|
|
|
|
b 5b
|
|
|
|
|
4:
|
|
|
|
|
ldr r0, [sp, #12]
|
|
|
|
|
mov r1, #0
|
|
|
|
|
mov r2, #256
|
|
|
|
|
b X(memset)
|
|
|
|
|
endfunc
|
