lavc/aarch64: add sbrdsp neon implementation

autocorrelate_c: 644.0
autocorrelate_neon: 420.0
hf_apply_noise_0_c: 1688.5
hf_apply_noise_0_neon: 1498.6
hf_apply_noise_1_c: 1691.2
hf_apply_noise_1_neon: 1500.6
hf_apply_noise_2_c: 1688.1
hf_apply_noise_2_neon: 1500.3
hf_apply_noise_3_c: 1696.6
hf_apply_noise_3_neon: 1502.2
hf_g_filt_c: 2117.8
hf_g_filt_neon: 1218.7
hf_gen_c: 4573.4
hf_gen_neon: 2461.0
neg_odd_64_c: 72.0
neg_odd_64_neon: 64.7
qmf_deint_bfly_c: 1107.6
qmf_deint_bfly_neon: 291.6
qmf_deint_neg_c: 210.4
qmf_deint_neg_neon: 107.4
qmf_post_shuffle_c: 163.0
qmf_post_shuffle_neon: 107.7
qmf_pre_shuffle_c: 120.5
qmf_pre_shuffle_neon: 110.7
sum64x5_c: 1361.6
sum64x5_neon: 435.4
sum_square_c: 1686.4
sum_square_neon: 787.2

libavcodec/aarch64/Makefile

@@ -11,7 +11,8 @@ OBJS-$(CONFIG_NEON_CLOBBER_TEST)        += aarch64/neontest.o
 OBJS-$(CONFIG_VIDEODSP)                 += aarch64/videodsp_init.o
 
 # decoders/encoders
-OBJS-$(CONFIG_AAC_DECODER)              += aarch64/aacpsdsp_init_aarch64.o
+OBJS-$(CONFIG_AAC_DECODER)              += aarch64/aacpsdsp_init_aarch64.o \
+                                           aarch64/sbrdsp_init_aarch64.o
 OBJS-$(CONFIG_DCA_DECODER)              += aarch64/synth_filter_init.o
 OBJS-$(CONFIG_RV40_DECODER)             += aarch64/rv40dsp_init_aarch64.o
 OBJS-$(CONFIG_VC1DSP)                   += aarch64/vc1dsp_init_aarch64.o
@@ -28,6 +29,7 @@ ARMV8-OBJS-$(CONFIG_VIDEODSP)           += aarch64/videodsp.o
 # NEON optimizations
 
 # subsystems
+NEON-OBJS-$(CONFIG_AAC_DECODER)         += aarch64/sbrdsp_neon.o
 NEON-OBJS-$(CONFIG_FFT)                 += aarch64/fft_neon.o
 NEON-OBJS-$(CONFIG_FMTCONVERT)          += aarch64/fmtconvert_neon.o
 NEON-OBJS-$(CONFIG_H264CHROMA)          += aarch64/h264cmc_neon.o

libavcodec/aarch64/sbrdsp_init_aarch64.c

+/*
+ * 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/aarch64/cpu.h"
+#include "libavutil/attributes.h"
+#include "libavcodec/sbrdsp.h"
+
+void ff_sbr_sum64x5_neon(float *z);
+float ff_sbr_sum_square_neon(float (*x)[2], int n);
+void ff_sbr_neg_odd_64_neon(float *x);
+void ff_sbr_qmf_pre_shuffle_neon(float *z);
+void ff_sbr_qmf_post_shuffle_neon(float W[32][2], const float *z);
+void ff_sbr_qmf_deint_neg_neon(float *v, const float *src);
+void ff_sbr_qmf_deint_bfly_neon(float *v, const float *src0, const float *src1);
+void ff_sbr_hf_g_filt_neon(float (*Y)[2], const float (*X_high)[40][2],
+                           const float *g_filt, int m_max, intptr_t ixh);
+void ff_sbr_hf_gen_neon(float (*X_high)[2], const float (*X_low)[2],
+                        const float alpha0[2], const float alpha1[2],
+                        float bw, int start, int end);
+void ff_sbr_autocorrelate_neon(const float x[40][2], float phi[3][2][2]);
+void ff_sbr_hf_apply_noise_0_neon(float Y[64][2], const float *s_m,
+                                  const float *q_filt, int noise,
+                                  int kx, int m_max);
+void ff_sbr_hf_apply_noise_1_neon(float Y[64][2], const float *s_m,
+                                  const float *q_filt, int noise,
+                                  int kx, int m_max);
+void ff_sbr_hf_apply_noise_2_neon(float Y[64][2], const float *s_m,
+                                  const float *q_filt, int noise,
+                                  int kx, int m_max);
+void ff_sbr_hf_apply_noise_3_neon(float Y[64][2], const float *s_m,
+                                  const float *q_filt, int noise,
+                                  int kx, int m_max);
+
+av_cold void ff_sbrdsp_init_aarch64(SBRDSPContext *s)
+{
+    int cpu_flags = av_get_cpu_flags();
+
+    if (have_neon(cpu_flags)) {
+        s->sum64x5 = ff_sbr_sum64x5_neon;
+        s->sum_square = ff_sbr_sum_square_neon;
+        s->neg_odd_64 = ff_sbr_neg_odd_64_neon;
+        s->qmf_pre_shuffle = ff_sbr_qmf_pre_shuffle_neon;
+        s->qmf_post_shuffle = ff_sbr_qmf_post_shuffle_neon;
+        s->qmf_deint_neg = ff_sbr_qmf_deint_neg_neon;
+        s->qmf_deint_bfly = ff_sbr_qmf_deint_bfly_neon;
+        s->hf_g_filt = ff_sbr_hf_g_filt_neon;
+        s->hf_gen = ff_sbr_hf_gen_neon;
+        s->autocorrelate = ff_sbr_autocorrelate_neon;
+        s->hf_apply_noise[0] = ff_sbr_hf_apply_noise_0_neon;
+        s->hf_apply_noise[1] = ff_sbr_hf_apply_noise_1_neon;
+        s->hf_apply_noise[2] = ff_sbr_hf_apply_noise_2_neon;
+        s->hf_apply_noise[3] = ff_sbr_hf_apply_noise_3_neon;
+    }
+}

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_x86(SBRDSPContext *s);
 void ff_sbrdsp_init_mips(SBRDSPContext *s);
 

libavcodec/sbrdsp_template.c

@@ -94,6 +94,8 @@ av_cold void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s)
 #if !USE_FIXED
     if (ARCH_ARM)
         ff_sbrdsp_init_arm(s);
+    if (ARCH_AARCH64)
+        ff_sbrdsp_init_aarch64(s);
     if (ARCH_X86)
         ff_sbrdsp_init_x86(s);
     if (ARCH_MIPS)