From 0d2fcaf176ab391688657ddc12be680ebc147447 Mon Sep 17 00:00:00 2001 From: Geoff Hill Date: Sat, 6 Apr 2024 07:25:56 -0700 Subject: [PATCH] avcodec/ac3: Implement ac3_exponent_min for aarch64 NEON MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Geoff Hill Signed-off-by: Martin Storsjö Signed-off-by: Paul B Mahol --- libavcodec/aarch64/ac3dsp_init_aarch64.c | 2 ++ libavcodec/aarch64/ac3dsp_neon.S | 16 +++++++++ tests/checkasm/ac3dsp.c | 42 ++++++++++++++++++++++++ 3 files changed, 60 insertions(+) diff --git a/libavcodec/aarch64/ac3dsp_init_aarch64.c b/libavcodec/aarch64/ac3dsp_init_aarch64.c index e3320de0f5..8874b41393 100644 --- a/libavcodec/aarch64/ac3dsp_init_aarch64.c +++ b/libavcodec/aarch64/ac3dsp_init_aarch64.c @@ -25,6 +25,7 @@ #include "libavcodec/ac3dsp.h" #include "config.h" +void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs); void ff_float_to_fixed24_neon(int32_t *dst, const float *src, size_t len); av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c) @@ -32,5 +33,6 @@ av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c) int cpu_flags = av_get_cpu_flags(); if (!have_neon(cpu_flags)) return; + c->ac3_exponent_min = ff_ac3_exponent_min_neon; c->float_to_fixed24 = ff_float_to_fixed24_neon; } diff --git a/libavcodec/aarch64/ac3dsp_neon.S b/libavcodec/aarch64/ac3dsp_neon.S index c4d204b51a..f916c32538 100644 --- a/libavcodec/aarch64/ac3dsp_neon.S +++ b/libavcodec/aarch64/ac3dsp_neon.S @@ -21,6 +21,22 @@ #include "libavutil/aarch64/asm.S" +function ff_ac3_exponent_min_neon, export=1 + cbz w1, 3f +1: ld1 {v0.16b}, [x0] + mov w3, w1 + add x4, x0, #256 +2: ld1 {v1.16b}, [x4] + umin v0.16b, v0.16b, v1.16b + add x4, x4, #256 + subs w3, w3, #1 + b.gt 2b + st1 {v0.16b}, [x0], #16 + subs w2, w2, #16 + b.gt 1b +3: ret +endfunc + function ff_float_to_fixed24_neon, export=1 1: ld1 {v0.4s, v1.4s}, [x1], #32 fcvtzs v0.4s, v0.4s, #24 diff --git a/tests/checkasm/ac3dsp.c b/tests/checkasm/ac3dsp.c index 344e1fe5c2..06f31339f9 100644 --- a/tests/checkasm/ac3dsp.c +++ b/tests/checkasm/ac3dsp.c @@ -1,5 +1,6 @@ /* * Copyright (c) 2023 Institue of Software Chinese Academy of Sciences (ISCAS). + * Copyright (c) 2024 Geoff Hill * * This file is part of FFmpeg. * @@ -27,6 +28,14 @@ #include "checkasm.h" +#define randomize_exp(buf, len) \ + do { \ + int i; \ + for (i = 0; i < len; i++) { \ + buf[i] = (uint8_t)rnd(); \ + } \ + } while (0) + #define randomize_float(buf, len) \ do { \ int i; \ @@ -36,6 +45,38 @@ } \ } while (0) +static void check_ac3_exponent_min(AC3DSPContext *c) { +#define MAX_COEFS 256 +#define MAX_CTXT 6 +#define EXP_SIZE (MAX_CTXT * MAX_COEFS) + + LOCAL_ALIGNED_16(uint8_t, src, [EXP_SIZE]); + LOCAL_ALIGNED_16(uint8_t, v1, [EXP_SIZE]); + LOCAL_ALIGNED_16(uint8_t, v2, [EXP_SIZE]); + int n; + + declare_func(void, uint8_t *, int, int); + + for (n = 0; n < MAX_CTXT; ++n) { + if (check_func(c->ac3_exponent_min, "ac3_exponent_min_reuse%d", n)) { + randomize_exp(src, EXP_SIZE); + + memcpy(v1, src, EXP_SIZE); + memcpy(v2, src, EXP_SIZE); + + call_ref(v1, n, MAX_COEFS); + call_new(v2, n, MAX_COEFS); + + if (memcmp(v1, v2, EXP_SIZE) != 0) + fail(); + + bench_new(v2, n, MAX_COEFS); + } + } + + report("ac3_exponent_min"); +} + static void check_float_to_fixed24(AC3DSPContext *c) { #define BUF_SIZE 1024 LOCAL_ALIGNED_32(float, src, [BUF_SIZE]); @@ -66,5 +107,6 @@ void checkasm_check_ac3dsp(void) AC3DSPContext c; ff_ac3dsp_init(&c); + check_ac3_exponent_min(&c); check_float_to_fixed24(&c); }