DCA: ARM/NEON optimised lfe_fir

Originally committed as revision 22863 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/arm/Makefile

@@ -33,7 +33,9 @@ NEON-OBJS-$(CONFIG_H264DSP)            += arm/h264dsp_neon.o            \
                                           arm/h264idct_neon.o           \
                                           arm/h264pred_neon.o           \
 
-NEON-OBJS-$(CONFIG_DCA_DECODER)        += arm/synth_filter_neon.o       \
+NEON-OBJS-$(CONFIG_DCA_DECODER)        += arm/dcadsp_init_arm.o         \
+                                          arm/dcadsp_neon.o             \
+                                          arm/synth_filter_neon.o       \
 
 NEON-OBJS-$(CONFIG_VP3_DECODER)        += arm/vp3dsp_neon.o
 

libavcodec/arm/dcadsp_init_arm.c

+/*
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.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 "config.h"
+#include "libavutil/attributes.h"
+#include "libavcodec/dcadsp.h"
+
+void ff_dca_lfe_fir_neon(float *out, const float *in, const float *coefs,
+                         int decifactor, float scale, float bias);
+
+void av_cold ff_dcadsp_init_arm(DCADSPContext *s)
+{
+    if (HAVE_NEON)
+        s->lfe_fir = ff_dca_lfe_fir_neon;
+}

libavcodec/arm/dcadsp_neon.S

+/*
+ * Copyright (c) 2010 Mans Rullgard <mans@mansr.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 "asm.S"
+
+function ff_dca_lfe_fir_neon, export=1
+        push            {r4-r6,lr}
+
+        add             r4,  r0,  r3,  lsl #2   @ out2
+        add             r5,  r2,  #256*4-16     @ cf1
+        sub             r1,  r1,  #12
+        cmp             r3,  #32
+        moveq           r6,  #256/32
+        movne           r6,  #256/64
+NOVFP   vldr            d0,  [sp, #16]          @ scale, bias
+        mov             lr,  #-16
+1:
+        vmov.f32        q2,  #0.0               @ v0
+        vmov.f32        q3,  #0.0               @ v1
+        mov             r12, r6
+2:
+        vld1.32         {q8},     [r2,:128]!    @ cf0
+        vld1.32         {q9},     [r5,:128], lr @ cf1
+        vld1.32         {q1},     [r1], lr      @ in
+        subs            r12, r12, #4
+        vrev64.32       q10, q8
+        vmla.f32        q3,  q1,  q9
+        vmla.f32        d4,  d2,  d21
+        vmla.f32        d5,  d3,  d20
+        bne             2b
+
+        add             r1,  r1,  r6,  lsl #2
+        subs            r3,  r3,  #1
+        vadd.f32        d4,  d4,  d5
+        vadd.f32        d6,  d6,  d7
+        vpadd.f32       d4,  d4,  d6
+        vdup.32         d5,  d0[1]
+        vmla.f32        d5,  d4,  d0[0]
+        vst1.32         {d5[0]},  [r0,:32]!
+        vst1.32         {d5[1]},  [r4,:32]!
+        bne             1b
+
+        pop             {r4-r6,pc}
+endfunc

libavcodec/dcadsp.c

@@ -19,6 +19,7 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include "config.h"
 #include "dcadsp.h"
 
 static void dca_lfe_fir_c(float *out, const float *in, const float *coefs,
@@ -46,4 +47,5 @@ static void dca_lfe_fir_c(float *out, const float *in, const float *coefs,
 void ff_dcadsp_init(DCADSPContext *s)
 {
     s->lfe_fir = dca_lfe_fir_c;
+    if (ARCH_ARM) ff_dcadsp_init_arm(s);
 }

libavcodec/dcadsp.h

@@ -25,5 +25,6 @@ typedef struct DCADSPContext {
 } DCADSPContext;
 
 void ff_dcadsp_init(DCADSPContext *s);
+void ff_dcadsp_init_arm(DCADSPContext *s);
 
 #endif /* AVCODEC_DCADSP_H */