lavc/aacencdsp: R-V V abs_pow34

C908:
abs_pow34_c: 535.5
abs_pow34_rvv_f32: 337.2

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

libavcodec/aacenc.c

@@ -1440,7 +1440,9 @@ void ff_aac_dsp_init(AACEncContext *s){
     s->abs_pow34   = abs_pow34_v;
     s->quant_bands = quantize_bands;
 
-#if ARCH_X86
+#if ARCH_RISCV
+    ff_aac_dsp_init_riscv(s);
+#elif ARCH_X86
     ff_aac_dsp_init_x86(s);
 #endif
 

libavcodec/aacenc.h

@@ -155,6 +155,7 @@ typedef struct AACEncContext {
 } AACEncContext;
 
 void ff_aac_dsp_init(AACEncContext *s);
+void ff_aac_dsp_init_riscv(AACEncContext *s);
 void ff_aac_dsp_init_x86(AACEncContext *s);
 void ff_aac_coder_init_mips(AACEncContext *c);
 void ff_quantize_band_cost_cache_init(struct AACEncContext *s);

libavcodec/riscv/Makefile

@@ -1,5 +1,7 @@
 OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_init.o riscv/sbrdsp_init.o
 RVV-OBJS-$(CONFIG_AAC_DECODER) += riscv/aacpsdsp_rvv.o riscv/sbrdsp_rvv.o
+OBJS-$(CONFIG_AAC_ENCODER) += riscv/aacencdsp_init.o
+RVV-OBJS-$(CONFIG_AAC_ENCODER) += riscv/aacencdsp_rvv.o
 OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_init.o
 RV-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvb.o
 RVV-OBJS-$(CONFIG_AC3DSP) += riscv/ac3dsp_rvv.o

libavcodec/riscv/aacencdsp_init.c

@@ -0,0 +1,42 @@
+/*
+ * AAC encoder assembly optimizations
+ * Copyright (c) 2023 Institue of Software Chinese Academy of Sciences (ISCAS).
+ *
+ * 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/float_dsp.h"
+#include "libavutil/cpu.h"
+#include "libavcodec/aacenc.h"
+
+void ff_abs_pow34_rvv(float *out, const float *in, const int size);
+
+av_cold void ff_aac_dsp_init_riscv(AACEncContext *s)
+{
+#if HAVE_RVV
+    int flags = av_get_cpu_flags();
+
+    if (flags & AV_CPU_FLAG_RVV_F32) {
+        if (flags & AV_CPU_FLAG_RVB_ADDR) {
+            s->abs_pow34 = ff_abs_pow34_rvv;
+        }
+    }
+#endif
+}

libavcodec/riscv/aacencdsp_rvv.S

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2023 Institue of Software Chinese Academy of Sciences (ISCAS).
+ *
+ * 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_abs_pow34_rvv, zve32f
+1:
+        vsetvli      t0, a2, e32, m8, ta, ma
+        sub          a2, a2, t0
+        vle32.v      v0, (a1)
+        sh2add       a1, t0, a1
+        vfabs.v      v0, v0
+        vfsqrt.v     v8, v0
+        vfmul.vv     v8, v8, v0
+        vfsqrt.v     v8, v8
+        vse32.v      v8, (a0)
+        sh2add       a0, t0, a0
+        bnez         a2, 1b
+
+        ret
+endfunc