* [FFmpeg-devel] [PR] avcodec/aarch64: add pngdsp (PR #21394)
@ 2026-01-06 14:39 Zhao Zhili via ffmpeg-devel
0 siblings, 0 replies; only message in thread
From: Zhao Zhili via ffmpeg-devel @ 2026-01-06 14:39 UTC (permalink / raw)
To: ffmpeg-devel; +Cc: Zhao Zhili
PR #21394 opened by Zhao Zhili (quink)
URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21394
Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21394.patch
```
Apple M4 (clang) Rpi5 A76 (gcc-12)
-----------------------------------------------------------------------
add_bytes_l2_4096_c: | 87.9 ( 1.00x) | 2059.9 ( 1.00x)
add_bytes_l2_4096_neon: | 47.1 ( 1.87x) | 452.5 ( 4.55x)
add_paeth_prediction_3_c: | 7904.5 ( 1.00x) | 43817.5 ( 1.00x)
add_paeth_prediction_3_neon: | 4901.8 ( 1.61x) | 23283.7 ( 1.88x)
add_paeth_prediction_4_c: | 7072.8 ( 1.00x) | 43624.6 ( 1.00x)
add_paeth_prediction_4_neon: | 3788.3 ( 1.87x) | 17681.6 ( 2.47x)
add_paeth_prediction_6_c: | 5592.2 ( 1.00x) | 41674.0 ( 1.00x)
add_paeth_prediction_6_neon: | 2901.2 ( 1.93x) | 11750.3 ( 3.55x)
add_paeth_prediction_8_c: | 4064.6 ( 1.00x) | 42175.8 ( 1.00x)
add_paeth_prediction_8_neon: | 2147.7 ( 1.89x) | 8827.5 ( 4.78x)
```
>From 34c22baf4caa689a3b6372ddaa86337857c48649 Mon Sep 17 00:00:00 2001
From: Zhao Zhili <zhilizhao@tencent.com>
Date: Sun, 4 Jan 2026 17:22:56 +0800
Subject: [PATCH 1/2] tests/checkasm: add test for png
---
tests/checkasm/Makefile | 1 +
tests/checkasm/checkasm.c | 3 ++
tests/checkasm/checkasm.h | 1 +
tests/checkasm/png.c | 103 ++++++++++++++++++++++++++++++++++++++
tests/fate/checkasm.mak | 1 +
5 files changed, 109 insertions(+)
create mode 100644 tests/checkasm/png.c
diff --git a/tests/checkasm/Makefile b/tests/checkasm/Makefile
index 48f358d40d..0f630e2804 100644
--- a/tests/checkasm/Makefile
+++ b/tests/checkasm/Makefile
@@ -42,6 +42,7 @@ AVCODECOBJS-$(CONFIG_HUFFYUV_DECODER) += huffyuvdsp.o
AVCODECOBJS-$(CONFIG_JPEG2000_DECODER) += jpeg2000dsp.o
AVCODECOBJS-$(CONFIG_OPUS_DECODER) += opusdsp.o
AVCODECOBJS-$(CONFIG_PIXBLOCKDSP) += pixblockdsp.o
+AVCODECOBJS-$(CONFIG_PNG_DECODER) += png.o
AVCODECOBJS-$(CONFIG_HEVC_DECODER) += hevc_add_res.o hevc_deblock.o hevc_idct.o hevc_sao.o hevc_pel.o
AVCODECOBJS-$(CONFIG_RV34DSP) += rv34dsp.o
AVCODECOBJS-$(CONFIG_RV40_DECODER) += rv40dsp.o
diff --git a/tests/checkasm/checkasm.c b/tests/checkasm/checkasm.c
index 7dcdaeb2a4..bfe0bd31be 100644
--- a/tests/checkasm/checkasm.c
+++ b/tests/checkasm/checkasm.c
@@ -230,6 +230,9 @@ static const struct {
#if CONFIG_PIXBLOCKDSP
{ "pixblockdsp", checkasm_check_pixblockdsp },
#endif
+ #if CONFIG_PNG_DECODER
+ { "png", checkasm_check_png },
+ #endif
#if CONFIG_QPELDSP
{ "qpeldsp", checkasm_check_qpeldsp },
#endif
diff --git a/tests/checkasm/checkasm.h b/tests/checkasm/checkasm.h
index f288320069..cc45087e41 100644
--- a/tests/checkasm/checkasm.h
+++ b/tests/checkasm/checkasm.h
@@ -129,6 +129,7 @@ void checkasm_check_mpegvideoencdsp(void);
void checkasm_check_nlmeans(void);
void checkasm_check_opusdsp(void);
void checkasm_check_pixblockdsp(void);
+void checkasm_check_png(void);
void checkasm_check_qpeldsp(void);
void checkasm_check_sbrdsp(void);
void checkasm_check_rv34dsp(void);
diff --git a/tests/checkasm/png.c b/tests/checkasm/png.c
new file mode 100644
index 0000000000..d2070afe42
--- /dev/null
+++ b/tests/checkasm/png.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2026 Zhao Zhili <quinkblack@foxmail.com>
+ *
+ * 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/mem_internal.h"
+#include "libavcodec/pngdsp.h"
+
+#include "checkasm.h"
+
+#define BUF_SIZE 4096
+
+#define randomize_buf(buf, size) \
+ do { \
+ for (int i = 0; i < size; i++) \
+ buf[i] = (uint8_t)rnd(); \
+ } while (0)
+
+static void check_add_bytes_l2(const PNGDSPContext *c)
+{
+ LOCAL_ALIGNED_16(uint8_t, dst0, [BUF_SIZE]);
+ LOCAL_ALIGNED_16(uint8_t, dst1, [BUF_SIZE]);
+ LOCAL_ALIGNED_16(uint8_t, src, [2], [BUF_SIZE]);
+
+ declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t *dst, uint8_t *src1, uint8_t *src2, int w);
+
+ randomize_buf(dst0, BUF_SIZE);
+ memcpy(dst1, dst0, BUF_SIZE);
+ randomize_buf(src[0], BUF_SIZE);
+ randomize_buf(src[1], BUF_SIZE);
+
+ const int size[] = {15, 2043, 4096};
+ for (int i = 0; i < FF_ARRAY_ELEMS(size); i++) {
+ if (check_func(c->add_bytes_l2, "add_bytes_l2_%d", size[i])) {
+ call_ref(dst0, src[0], src[1], size[i]);
+ call_new(dst1, src[0], src[1], size[i]);
+ checkasm_check(uint8_t, dst0, BUF_SIZE, dst1, BUF_SIZE, BUF_SIZE, 1, "dst");
+ if (size[i] == BUF_SIZE)
+ bench_new(dst1, src[0], src[1], BUF_SIZE);
+ }
+ }
+}
+
+static void check_add_paeth_prediction(const PNGDSPContext *c)
+{
+ LOCAL_ALIGNED_16(uint8_t, dst0_buf, [BUF_SIZE]);
+ LOCAL_ALIGNED_16(uint8_t, dst1_buf, [BUF_SIZE]);
+ LOCAL_ALIGNED_16(uint8_t, src, [BUF_SIZE]);
+ LOCAL_ALIGNED_16(uint8_t, top_buf, [BUF_SIZE]);
+
+ randomize_buf(dst0_buf, BUF_SIZE);
+ randomize_buf(src, BUF_SIZE);
+ randomize_buf(top_buf, BUF_SIZE);
+
+ declare_func_emms(AV_CPU_FLAG_MMX, void, uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp);
+
+ const int bpps[] = {3, 4, 6, 8};
+ for (int i = 0; i < FF_ARRAY_ELEMS(bpps); i++) {
+ int bpp = bpps[i];
+ if (check_func(c->add_paeth_prediction, "add_paeth_prediction_%d", bpp)) {
+ uint8_t *dst0 = &dst0_buf[bpp];
+ uint8_t *dst1 = &dst1_buf[bpp];
+ uint8_t *top = &top_buf[bpp];
+ int w = BUF_SIZE - bpp;
+
+ // dst buffer is both read and written, so dst0 and dst1 must remain the same before test
+ memcpy(dst1_buf, dst0_buf, BUF_SIZE);
+
+ call_ref(dst0, src, top, w, bpp);
+ call_new(dst1, src, top, w, bpp);
+ checkasm_check(uint8_t, dst0_buf, BUF_SIZE, dst1_buf, BUF_SIZE, BUF_SIZE, 1, "dst");
+ bench_new(dst1, src, top, w, bpp);
+ }
+ }
+}
+
+void checkasm_check_png(void)
+{
+ PNGDSPContext c;
+
+ ff_pngdsp_init(&c);
+
+ check_add_bytes_l2(&c);
+ report("add_bytes_l2");
+ check_add_paeth_prediction(&c);
+ report("add_paeth_prediction");
+}
diff --git a/tests/fate/checkasm.mak b/tests/fate/checkasm.mak
index b08c1947cd..89e319c9b9 100644
--- a/tests/fate/checkasm.mak
+++ b/tests/fate/checkasm.mak
@@ -44,6 +44,7 @@ FATE_CHECKASM = fate-checkasm-aacencdsp \
fate-checkasm-mpegvideoencdsp \
fate-checkasm-opusdsp \
fate-checkasm-pixblockdsp \
+ fate-checkasm-png \
fate-checkasm-qpeldsp \
fate-checkasm-sbrdsp \
fate-checkasm-rv34dsp \
--
2.49.1
>From 16eecc10ccce1a6ad43bade9975ef686d8008f3c Mon Sep 17 00:00:00 2001
From: Zhao Zhili <zhilizhao@tencent.com>
Date: Mon, 5 Jan 2026 12:24:45 +0800
Subject: [PATCH 2/2] avcodec/aarch64: add pngdsp
Apple M4 (clang) Rpi5 A76 (gcc-12)
-----------------------------------------------------------------------
add_bytes_l2_4096_c: | 87.9 ( 1.00x) | 2059.9 ( 1.00x)
add_bytes_l2_4096_neon: | 47.1 ( 1.87x) | 452.5 ( 4.55x)
add_paeth_prediction_3_c: | 7904.5 ( 1.00x) | 43817.5 ( 1.00x)
add_paeth_prediction_3_neon: | 4901.8 ( 1.61x) | 23283.7 ( 1.88x)
add_paeth_prediction_4_c: | 7072.8 ( 1.00x) | 43624.6 ( 1.00x)
add_paeth_prediction_4_neon: | 3788.3 ( 1.87x) | 17681.6 ( 2.47x)
add_paeth_prediction_6_c: | 5592.2 ( 1.00x) | 41674.0 ( 1.00x)
add_paeth_prediction_6_neon: | 2901.2 ( 1.93x) | 11750.3 ( 3.55x)
add_paeth_prediction_8_c: | 4064.6 ( 1.00x) | 42175.8 ( 1.00x)
add_paeth_prediction_8_neon: | 2147.7 ( 1.89x) | 8827.5 ( 4.78x)
---
libavcodec/aarch64/Makefile | 2 +
libavcodec/aarch64/pngdsp_init.c | 40 ++++++
libavcodec/aarch64/pngdsp_neon.S | 206 +++++++++++++++++++++++++++++++
libavcodec/pngdsp.c | 4 +-
libavcodec/pngdsp.h | 1 +
5 files changed, 252 insertions(+), 1 deletion(-)
create mode 100644 libavcodec/aarch64/pngdsp_init.c
create mode 100644 libavcodec/aarch64/pngdsp_neon.S
diff --git a/libavcodec/aarch64/Makefile b/libavcodec/aarch64/Makefile
index 2bf48dfa28..ce98a4a9c5 100644
--- a/libavcodec/aarch64/Makefile
+++ b/libavcodec/aarch64/Makefile
@@ -13,6 +13,7 @@ OBJS-$(CONFIG_MPEGAUDIODSP) += aarch64/mpegaudiodsp_init.o
OBJS-$(CONFIG_MPEGVIDEOENCDSP) += aarch64/mpegvideoencdsp_init.o
OBJS-$(CONFIG_NEON_CLOBBER_TEST) += aarch64/neontest.o
OBJS-$(CONFIG_PIXBLOCKDSP) += aarch64/pixblockdsp_init_aarch64.o
+OBJS-$(CONFIG_PNG_DECODER) += aarch64/pngdsp_init.o
OBJS-$(CONFIG_VIDEODSP) += aarch64/videodsp_init.o
OBJS-$(CONFIG_VP8DSP) += aarch64/vp8dsp_init_aarch64.o
@@ -56,6 +57,7 @@ NEON-OBJS-$(CONFIG_ME_CMP) += aarch64/me_cmp_neon.o
NEON-OBJS-$(CONFIG_MPEGAUDIODSP) += aarch64/mpegaudiodsp_neon.o
NEON-OBJS-$(CONFIG_MPEGVIDEOENCDSP) += aarch64/mpegvideoencdsp_neon.o
NEON-OBJS-$(CONFIG_PIXBLOCKDSP) += aarch64/pixblockdsp_neon.o
+NEON-OBJS-$(CONFIG_PNG_DECODER) += aarch64/pngdsp_neon.o
NEON-OBJS-$(CONFIG_VC1DSP) += aarch64/vc1dsp_neon.o
NEON-OBJS-$(CONFIG_VP8DSP) += aarch64/vp8dsp_neon.o
diff --git a/libavcodec/aarch64/pngdsp_init.c b/libavcodec/aarch64/pngdsp_init.c
new file mode 100644
index 0000000000..5850b09b03
--- /dev/null
+++ b/libavcodec/aarch64/pngdsp_init.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2026 Zhao Zhili <zhilizhao@tencent.com>
+ *
+ * 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 <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/aarch64/cpu.h"
+#include "libavcodec/pngdsp.h"
+
+void ff_add_bytes_l2_neon(uint8_t *dst, uint8_t *src1,
+ uint8_t *src2, int w);
+void ff_add_png_paeth_prediction_neon(uint8_t *dst, uint8_t *src,
+ uint8_t *top, int w, int bpp);
+
+av_cold void ff_pngdsp_init_aarch64(PNGDSPContext *dsp)
+{
+ int cpu_flags = av_get_cpu_flags();
+
+ if (have_neon(cpu_flags)) {
+ dsp->add_bytes_l2 = ff_add_bytes_l2_neon;
+ dsp->add_paeth_prediction = ff_add_png_paeth_prediction_neon;
+ }
+}
diff --git a/libavcodec/aarch64/pngdsp_neon.S b/libavcodec/aarch64/pngdsp_neon.S
new file mode 100644
index 0000000000..afccb92ffe
--- /dev/null
+++ b/libavcodec/aarch64/pngdsp_neon.S
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2026 Zhao Zhili <zhilizhao@tencent.com>
+ *
+ * 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/aarch64/asm.S"
+
+function ff_add_bytes_l2_neon, export=1
+ bic w4, w3, #63
+ and w3, w3, #63
+ cbz w4, 2f
+1:
+ // 64 bytes per loop iteration
+ ld1 {v0.16b - v3.16b}, [x1], #64
+ ld1 {v4.16b - v7.16b}, [x2], #64
+ subs w4, w4, #64
+ add v0.16b, v0.16b, v4.16b
+ add v1.16b, v1.16b, v5.16b
+ add v2.16b, v2.16b, v6.16b
+ add v3.16b, v3.16b, v7.16b
+ st1 {v0.16b - v3.16b}, [x0], #64
+ b.ne 1b
+2:
+ bic w4, w3, #15
+ and w3, w3, #15
+ cbz w4, 4f
+3:
+ // 16 bytes per loop iteration
+ ld1 {v0.16b}, [x1], #16
+ ld1 {v4.16b}, [x2], #16
+ subs w4, w4, #16
+ add v0.16b, v0.16b, v4.16b
+ st1 {v0.16b}, [x0], #16
+ b.ne 3b
+4:
+ cbz w3, 6f
+5:
+ ldrb w5, [x1], #1
+ ldrb w6, [x2], #1
+ subs w3, w3, #1
+ add w5, w5, w6
+ strb w5, [x0], #1
+ b.ne 5b
+6:
+ ret
+endfunc
+
+.macro add_png_paeth_prediction, bpp, load=0
+.if \load
+ ldr q0, [x0, #(-\bpp)] // a = dst[i - bpp]
+ ldr q1, [x2, #(-\bpp)] // c = top[i - bpp]
+ ld1 {v2.16b}, [x2] // b = top[i]
+ ld1 {v18.16b}, [x1]
+.else
+ mov v1.16b, v2.16b
+ ext v2.16b, v2.16b, v2.16b, #\bpp
+ ext v18.16b, v18.16b, v18.16b, #\bpp
+.endif
+
+ uabd v4.8b, v2.8b, v1.8b // pa = abs(b - c)
+ uaddl v7.8h, v1.8b, v1.8b // 2 * c
+ uabd v3.8b, v0.8b, v1.8b // pb = abs(a - c)
+ uaddl v5.8h, v0.8b, v2.8b // a + b
+
+ cmhs v16.8b, v3.8b, v4.8b // pb >= pa
+ uabd v5.8h, v5.8h, v7.8h
+ umin v6.8b, v4.8b, v3.8b // min(pa, pb)
+ uqxtn v5.8b, v5.8h
+
+ bsl v16.8b, v0.8b, v2.8b // pb >= pa ? a : b
+ cmhs v6.8b, v5.8b, v6.8b // pc >= min(pa, pb)
+ bsl v6.8b, v16.8b, v1.8b // pc >= min ? (a or b) : c
+
+ add v0.8b, v6.8b, v18.8b
+.if \bpp == 3 || \bpp == 4
+ str s0, [x0], #\bpp
+.else
+ str d0, [x0], #\bpp
+.endif
+.endm
+
+function ff_add_png_paeth_prediction_neon, export=1
+ cmp w4, #3
+ b.gt 40f
+30: // bpp = 3
+ // 15 bytes per loop
+ // overread and write one byte, so (w3 - 1) first
+ sub w5, w3, #1
+ mov w7, #15
+ udiv w5, w5, w7
+ mul w5, w5, w7
+ sub w3, w3, w5
+ cbz w5, 2f
+31:
+ add_png_paeth_prediction 3, load=1
+ subs w5, w5, w7
+ add x1, x1, x7
+ add x2, x2, x7
+.rept 4
+ add_png_paeth_prediction 3
+.endr
+ b.ne 31b
+ b 2f
+
+40: // bpp = 4
+ cmp w4, #4
+ b.gt 60f
+ // 16 bytes per loop
+ bic w5, w3, #15
+ and w3, w3, #15
+ cbz w5, 2f
+41:
+ add_png_paeth_prediction 4, load=1
+ subs w5, w5, #16
+ add x1, x1, #16
+ add x2, x2, #16
+.rept 3
+ add_png_paeth_prediction 4
+.endr
+ b.ne 41b
+ b 2f
+
+60: // bpp = 6
+ cmp w4, #6
+ b.gt 80f
+ // 12 bytes per loop
+ // overread 4 bytes, overwrite 2 byte, (w3 - 4) first
+ sub w5, w3, #4
+ mov w7, #12
+ udiv w5, w5, w7
+ mul w5, w5, w7
+ sub w3, w3, w5
+ cbz w5, 2f
+61:
+ add_png_paeth_prediction 6, load=1
+ add_png_paeth_prediction 6
+ subs w5, w5, w7
+ add x1, x1, x7
+ add x2, x2, x7
+ b.ne 61b
+ b 2f
+
+80: // 16 bytes per loop
+ bic w5, w3, #15
+ and w3, w3, #15
+ cbz w5, 2f
+81:
+ add_png_paeth_prediction 8, load=1
+ add_png_paeth_prediction 8
+ subs w5, w5, #16
+ add x1, x1, #16
+ add x2, x2, #16
+ b.ne 81b
+2:
+ neg w6, w4 // -bpp
+ cbz w3, 8f
+3:
+ ldrb w7, [x0, w6, sxtw] // a = dst[i - bpp]
+ ldrb w9, [x2, w6, sxtw] // c = top[i - bpp]
+ ldrb w8, [x2], #1 // b = top[i]
+
+ sub w10, w8, w9 // p = b - c
+ sub w11, w7, w9 // a - c
+
+ cmp w10, #0
+ cneg w12, w10, lt // pa = abs(b -c)
+ cmp w11, #0
+ add w14, w10, w11
+ cneg w13, w11, lt // pb = abs(a - c)
+ cmp w14, #0
+ cneg w14, w14, lt // pc = abs(a + b - 2*c)
+
+ ldrb w16, [x1], #1
+
+ cmp w12, w13
+ b.gt 4f
+ cmp w12, w14
+ b.gt 4f
+ mov w15, w7
+ b 5f
+4:
+ cmp w13, w14
+ csel w15, w8, w9, le
+5:
+ subs w3, w3, #1
+ add w15, w15, w16
+ strb w15, [x0], #1
+ b.ne 3b
+8:
+ ret
+endfunc
diff --git a/libavcodec/pngdsp.c b/libavcodec/pngdsp.c
index ae40113a51..5c96b9a32c 100644
--- a/libavcodec/pngdsp.c
+++ b/libavcodec/pngdsp.c
@@ -58,7 +58,9 @@ av_cold void ff_pngdsp_init(PNGDSPContext *dsp)
dsp->add_bytes_l2 = add_bytes_l2_c;
dsp->add_paeth_prediction = ff_add_png_paeth_prediction;
-#if ARCH_X86 && HAVE_X86ASM
+#if ARCH_AARCH64
+ ff_pngdsp_init_aarch64(dsp);
+#elif ARCH_X86 && HAVE_X86ASM
ff_pngdsp_init_x86(dsp);
#endif
}
diff --git a/libavcodec/pngdsp.h b/libavcodec/pngdsp.h
index 5475d0d943..29cf96f22c 100644
--- a/libavcodec/pngdsp.h
+++ b/libavcodec/pngdsp.h
@@ -35,6 +35,7 @@ typedef struct PNGDSPContext {
} PNGDSPContext;
void ff_pngdsp_init(PNGDSPContext *dsp);
+void ff_pngdsp_init_aarch64(PNGDSPContext *dsp);
void ff_pngdsp_init_x86(PNGDSPContext *dsp);
#endif /* AVCODEC_PNGDSP_H */
--
2.49.1
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2026-01-06 14:39 [FFmpeg-devel] [PR] avcodec/aarch64: add pngdsp (PR #21394) Zhao Zhili via ffmpeg-devel
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