lavc/sbrdsp: R-V V sum64x5

sum64x5_c:       385.0
sum64x5_rvv_f32: 116.0

libavcodec/riscv/Makefile

@@ -1,5 +1,5 @@
-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_init.o
+OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_init.o riscv/sbrdsp_init.o
-RVV-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_rvv.o
+RVV-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_rvv.o riscv/sbrdsp_rvv.o
 OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_init.o \
                          riscv/ac3dsp_rvb.o
 OBJS-$(CONFIG_ALAC_DECODER) += riscv/alacdsp_init.o

libavcodec/riscv/sbrdsp_init.c

@@ -0,0 +1,37 @@
+/*
+ * Copyright © 2023 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 "libavcodec/sbrdsp.h"
+
+void ff_sbr_sum64x5_rvv(float *z);
+
+av_cold void ff_sbrdsp_init_riscv(SBRDSPContext *c)
+{
+#if HAVE_RVV
+    int flags = av_get_cpu_flags();
+
+    if ((flags & AV_CPU_FLAG_RVV_F32) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
+        c->sum64x5 = ff_sbr_sum64x5_rvv;
+    }
+#endif
+}

libavcodec/riscv/sbrdsp_rvv.S

@@ -0,0 +1,50 @@
+/*
+ * Copyright © 2023 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 "libavutil/riscv/asm.S"
+
+func ff_sbr_sum64x5_rvv, zve32f
+        li      a5, 64
+        addi    a1, a0, 64 * 4
+        addi    a2, a0, 128 * 4
+        addi    a3, a0, 192 * 4
+        addi    a4, a0, 256 * 4
+1:
+        vsetvli t0, a5, e32, m8, ta, ma
+        sub     a5, a5, t0
+        vle32.v v0, (a0)
+        vle32.v v8, (a1)
+        sh2add  a1, t0, a1
+        vle32.v v16, (a2)
+        vfadd.vv v0, v0, v8
+        sh2add  a2, t0, a2
+        vle32.v v24, (a3)
+        vfadd.vv v0, v0, v16
+        sh2add  a3, t0, a3
+        vle32.v v8, (a4)
+        vfadd.vv v0, v0, v24
+        sh2add  a4, t0, a4
+        vfadd.vv v0, v0, v8
+        vse32.v v0, (a0)
+        sh2add  a0, t0, a0
+        bnez    a5, 1b
+
+        ret
+endfunc

libavcodec/sbrdsp.h

@@ -48,6 +48,7 @@ extern const INTFLOAT AAC_RENAME(ff_sbr_noise_table)[][2];
 void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s);
 void ff_sbrdsp_init_arm(SBRDSPContext *s);
 void ff_sbrdsp_init_aarch64(SBRDSPContext *s);
+void ff_sbrdsp_init_riscv(SBRDSPContext *s);
 void ff_sbrdsp_init_x86(SBRDSPContext *s);
 void ff_sbrdsp_init_mips(SBRDSPContext *s);
 

libavcodec/sbrdsp_template.c

@@ -98,6 +98,8 @@ av_cold void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s)
     ff_sbrdsp_init_arm(s);
 #elif ARCH_AARCH64
     ff_sbrdsp_init_aarch64(s);
+#elif ARCH_RISCV
+    ff_sbrdsp_init_riscv(s);
 #elif ARCH_X86
     ff_sbrdsp_init_x86(s);
 #elif ARCH_MIPS