@@ -58,6 +58,8 @@ av_cold void ff_opus_dsp_init(OpusDSP *ctx)
#if ARCH_AARCH64
ff_opus_dsp_init_aarch64(ctx);
+#elif ARCH_RISCV
+ ff_opus_dsp_init_riscv(ctx);
#elif ARCH_X86
ff_opus_dsp_init_x86(ctx);
#endif
@@ -30,5 +30,6 @@ void ff_opus_dsp_init(OpusDSP *ctx);
void ff_opus_dsp_init_x86(OpusDSP *ctx);
void ff_opus_dsp_init_aarch64(OpusDSP *ctx);
+void ff_opus_dsp_init_riscv(OpusDSP *ctx);
#endif /* AVCODEC_OPUSDSP_H */
@@ -7,6 +7,8 @@ OBJS-$(CONFIG_FMTCONVERT) += riscv/fmtconvert_init.o
RVV-OBJS-$(CONFIG_FMTCONVERT) += riscv/fmtconvert_rvv.o
OBJS-$(CONFIG_IDCTDSP) += riscv/idctdsp_init.o
RVV-OBJS-$(CONFIG_IDCTDSP) += riscv/idctdsp_rvv.o
+OBJS-$(CONFIG_OPUS_DECODER) += riscv/opusdsp_init.o \
+ riscv/opusdsp_rvf.o
OBJS-$(CONFIG_PIXBLOCKDSP) += riscv/pixblockdsp_init.o \
riscv/pixblockdsp_rvi.o
RVV-OBJS-$(CONFIG_PIXBLOCKDSP) += riscv/pixblockdsp_rvv.o
new file mode 100644
@@ -0,0 +1,36 @@
+/*
+ * Copyright © 2022 Rémi Denis-Courmont.
+ *
+ * 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 "config.h"
+
+#include "libavutil/attributes.h"
+#include "libavutil/cpu.h"
+#include "libavutil/riscv/cpu.h"
+#include "libavcodec/opusdsp.h"
+
+float ff_opus_deemphasis_rvf(float *out, float *in, float c, int len);
+
+av_cold void ff_opus_dsp_init_riscv(OpusDSP *d)
+{
+ int flags = av_get_cpu_flags();
+
+ if (flags & AV_CPU_FLAG_RVF)
+ d->deemphasis = ff_opus_deemphasis_rvf;
+}
new file mode 100644
@@ -0,0 +1,41 @@
+/*
+ * Copyright © 2022 Rémi Denis-Courmont.
+ *
+ * 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 "config.h"
+#include "libavutil/riscv/asm.S"
+
+func ff_opus_deemphasis_rvf, f
+NOHWF fmv.w.x fa0, a2
+NOHWF mv a2, a3
+ slli a2, a2, 2
+ li t0, 0x3f599a00 // 0.85
+ add a2, a1, a2
+ fmv.w.x ft0, t0
+1:
+ flw ft1, (a1)
+ addi a0, a0, 4
+ fmadd.s fa0, fa0, ft0, ft1
+ addi a1, a1, 4
+ fsw fa0, -4(a0)
+ bne a1, a2, 1b
+
+NOHWF fmv.x.w a0, fa0
+ ret
+endfunc
From: Rémi Denis-Courmont <remi@remlab.net> This saves almost exactly 25% on SiFive U74. deemphasis_c: 11536.2 deemphasis_rvf: 8654.2 --- libavcodec/opusdsp.c | 2 ++ libavcodec/opusdsp.h | 1 + libavcodec/riscv/Makefile | 2 ++ libavcodec/riscv/opusdsp_init.c | 36 +++++++++++++++++++++++++++++ libavcodec/riscv/opusdsp_rvf.S | 41 +++++++++++++++++++++++++++++++++ 5 files changed, 82 insertions(+) create mode 100644 libavcodec/riscv/opusdsp_init.c create mode 100644 libavcodec/riscv/opusdsp_rvf.S