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https://git.ffmpeg.org/ffmpeg.git
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db3f6465a6
* commit '12655c48049f9a52e5504bde90fe738862b0ff08': libavresample: NEON optimized FIR audio resampling Merged-by: Michael Niedermayer <michaelni@gmx.at>
359 lines
9.0 KiB
ArmAsm
359 lines
9.0 KiB
ArmAsm
/*
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* Copyright (c) 2014 Peter Meerwald <pmeerw@pmeerw.net>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/arm/asm.S"
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#include "asm-offsets.h"
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.macro resample_one fmt, es=2
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function ff_resample_one_\fmt\()_neon, export=1
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push {r4, r5}
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add r1, r1, r2, lsl #\es
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ldr r2, [r0, #PHASE_SHIFT+4] /* phase_mask */
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ldr ip, [sp, #8] /* index */
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ldr r5, [r0, #FILTER_LENGTH]
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and r2, ip, r2 /* (index & phase_mask) */
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ldr r4, [r0, #PHASE_SHIFT]
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lsr r4, ip, r4 /* compute sample_index */
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mul r2, r2, r5
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ldr ip, [r0, #FILTER_BANK]
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add r3, r3, r4, lsl #\es /* &src[sample_index] */
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cmp r5, #8
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add r0, ip, r2, lsl #\es /* filter = &filter_bank[...] */
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blt 5f
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8:
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subs r5, r5, #8
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LOAD4
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MUL4
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7:
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LOAD4
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beq 6f
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cmp r5, #8
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MLA4
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blt 4f
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subs r5, r5, #8
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LOAD4
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MLA4
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b 7b
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6:
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MLA4
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STORE
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pop {r4, r5}
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bx lr
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5:
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INIT4
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4: /* remaining filter_length 1 to 7 */
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cmp r5, #4
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blt 2f
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subs r5, r5, #4
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LOAD4
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MLA4
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beq 0f
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2: /* remaining filter_length 1 to 3 */
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cmp r5, #2
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blt 1f
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subs r5, r5, #2
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LOAD2
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MLA2
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beq 0f
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1: /* remaining filter_length 1 */
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LOAD1
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MLA1
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0:
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STORE
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pop {r4, r5}
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bx lr
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endfunc
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.purgem LOAD1
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.purgem LOAD2
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.purgem LOAD4
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.purgem MLA1
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.purgem MLA2
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.purgem MLA4
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.purgem MUL4
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.purgem INIT4
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.purgem STORE
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.endm
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/* float32 */
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.macro LOAD1
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veor.32 d0, d0
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vld1.32 {d0[0]}, [r0]! /* load filter */
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vld1.32 {d4[0]}, [r3]! /* load src */
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.endm
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.macro LOAD2
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vld1.32 {d0}, [r0]! /* load filter */
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vld1.32 {d4}, [r3]! /* load src */
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.endm
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.macro LOAD4
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vld1.32 {d0,d1}, [r0]! /* load filter */
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vld1.32 {d4,d5}, [r3]! /* load src */
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.endm
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.macro MLA1
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vmla.f32 d16, d0, d4[0]
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.endm
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.macro MLA2
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vmla.f32 d16, d0, d4
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.endm
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.macro MLA4
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vmla.f32 d16, d0, d4
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vmla.f32 d17, d1, d5
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.endm
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.macro MUL4
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vmul.f32 d16, d0, d4
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vmul.f32 d17, d1, d5
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.endm
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.macro INIT4
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veor.f32 q8, q8
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.endm
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.macro STORE
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vpadd.f32 d16, d16, d17
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vpadd.f32 d16, d16, d16
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vst1.32 d16[0], [r1]
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.endm
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resample_one flt, 2
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/* s32 */
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.macro LOAD1
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veor.32 d0, d0
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vld1.32 {d0[0]}, [r0]! /* load filter */
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vld1.32 {d4[0]}, [r3]! /* load src */
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.endm
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.macro LOAD2
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vld1.32 {d0}, [r0]! /* load filter */
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vld1.32 {d4}, [r3]! /* load src */
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.endm
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.macro LOAD4
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vld1.32 {d0,d1}, [r0]! /* load filter */
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vld1.32 {d4,d5}, [r3]! /* load src */
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.endm
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.macro MLA1
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vmlal.s32 q8, d0, d4[0]
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.endm
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.macro MLA2
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vmlal.s32 q8, d0, d4
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.endm
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.macro MLA4
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vmlal.s32 q8, d0, d4
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vmlal.s32 q9, d1, d5
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.endm
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.macro MUL4
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vmull.s32 q8, d0, d4
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vmull.s32 q9, d1, d5
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.endm
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.macro INIT4
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veor.s64 q8, q8
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veor.s64 q9, q9
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.endm
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.macro STORE
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vadd.s64 q8, q8, q9
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vadd.s64 d16, d16, d17
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vqrshrn.s64 d16, q8, #30
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vst1.32 d16[0], [r1]
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.endm
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resample_one s32, 2
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/* s16 */
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.macro LOAD1
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veor.16 d0, d0
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vld1.16 {d0[0]}, [r0]! /* load filter */
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vld1.16 {d4[0]}, [r3]! /* load src */
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.endm
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.macro LOAD2
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veor.16 d0, d0
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vld1.32 {d0[0]}, [r0]! /* load filter */
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veor.16 d4, d4
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vld1.32 {d4[0]}, [r3]! /* load src */
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.endm
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.macro LOAD4
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vld1.16 {d0}, [r0]! /* load filter */
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vld1.16 {d4}, [r3]! /* load src */
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.endm
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.macro MLA1
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vmlal.s16 q8, d0, d4[0]
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.endm
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.macro MLA2
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vmlal.s16 q8, d0, d4
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.endm
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.macro MLA4
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vmlal.s16 q8, d0, d4
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.endm
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.macro MUL4
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vmull.s16 q8, d0, d4
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.endm
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.macro INIT4
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veor.s32 q8, q8
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.endm
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.macro STORE
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vpadd.s32 d16, d16, d17
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vpadd.s32 d16, d16, d16
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vqrshrn.s32 d16, q8, #15
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vst1.16 d16[0], [r1]
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.endm
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resample_one s16, 1
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.macro resample_linear fmt, es=2
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function ff_resample_linear_\fmt\()_neon, export=1
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push {r4, r5}
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add r1, r1, r2, lsl #\es
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ldr r2, [r0, #PHASE_SHIFT+4] /* phase_mask */
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ldr ip, [sp, #8] /* index */
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ldr r5, [r0, #FILTER_LENGTH]
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and r2, ip, r2 /* (index & phase_mask) */
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ldr r4, [r0, #PHASE_SHIFT]
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lsr r4, ip, r4 /* compute sample_index */
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mul r2, r2, r5
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ldr ip, [r0, #FILTER_BANK]
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add r3, r3, r4, lsl #\es /* &src[sample_index] */
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cmp r5, #8
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ldr r4, [r0, #SRC_INCR]
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add r0, ip, r2, lsl #\es /* filter = &filter_bank[...] */
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add r2, r0, r5, lsl #\es /* filter[... + c->filter_length] */
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blt 5f
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8:
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subs r5, r5, #8
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LOAD4
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MUL4
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7:
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LOAD4
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beq 6f
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cmp r5, #8
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MLA4
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blt 4f
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subs r5, r5, #8
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LOAD4
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MLA4
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b 7b
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6:
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MLA4
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STORE
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pop {r4, r5}
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bx lr
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5:
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INIT4
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4: /* remaining filter_length 1 to 7 */
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cmp r5, #4
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blt 2f
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subs r5, r5, #4
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LOAD4
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MLA4
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beq 0f
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2: /* remaining filter_length 1 to 3 */
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cmp r5, #2
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blt 1f
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subs r5, r5, #2
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LOAD2
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MLA2
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beq 0f
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1: /* remaining filter_length 1 */
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LOAD1
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MLA1
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0:
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STORE
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pop {r4, r5}
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bx lr
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endfunc
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.purgem LOAD1
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.purgem LOAD2
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.purgem LOAD4
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.purgem MLA1
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.purgem MLA2
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.purgem MLA4
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.purgem MUL4
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.purgem INIT4
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.purgem STORE
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.endm
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/* float32 linear */
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.macro LOAD1
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veor.32 d0, d0
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veor.32 d2, d2
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vld1.32 {d0[0]}, [r0]! /* load filter */
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vld1.32 {d2[0]}, [r2]! /* load filter */
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vld1.32 {d4[0]}, [r3]! /* load src */
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.endm
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.macro LOAD2
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vld1.32 {d0}, [r0]! /* load filter */
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vld1.32 {d2}, [r2]! /* load filter */
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vld1.32 {d4}, [r3]! /* load src */
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.endm
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.macro LOAD4
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vld1.32 {d0,d1}, [r0]! /* load filter */
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vld1.32 {d2,d3}, [r2]! /* load filter */
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vld1.32 {d4,d5}, [r3]! /* load src */
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.endm
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.macro MLA1
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vmla.f32 d18, d0, d4[0]
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vmla.f32 d16, d2, d4[0]
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.endm
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.macro MLA2
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vmla.f32 d18, d0, d4
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vmla.f32 d16, d2, d4
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.endm
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.macro MLA4
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vmla.f32 q9, q0, q2
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vmla.f32 q8, q1, q2
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.endm
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.macro MUL4
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vmul.f32 q9, q0, q2
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vmul.f32 q8, q1, q2
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.endm
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.macro INIT4
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veor.f32 q9, q9
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veor.f32 q8, q8
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.endm
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.macro STORE
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vldr s0, [sp, #12] /* frac */
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vmov s1, r4
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vcvt.f32.s32 d0, d0
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vsub.f32 q8, q8, q9 /* v2 - val */
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vpadd.f32 d18, d18, d19
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vpadd.f32 d16, d16, d17
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vpadd.f32 d2, d18, d18
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vpadd.f32 d1, d16, d16
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vmul.f32 s2, s2, s0 /* (v2 - val) * frac */
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vdiv.f32 s2, s2, s1 /* / c->src_incr */
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vadd.f32 s4, s4, s2
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vstr s4, [r1]
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.endm
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resample_linear flt, 2
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