Chiebot-Mirror
/
FFmpeg
mirror of https://github.com/FFmpeg/FFmpeg.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

AAC: ARM/NEON asm for VMUL2/4 functions

Browse Source 
Originally committed as revision 21219 to svn://svn.ffmpeg.org/ffmpeg/trunk
release/0.6
Måns Rullgård 15 years ago
parent c78dfcdaf4
commit 798339fb46
2 changed files with 142 additions and 0 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 12
      libavcodec/aac.c
  2. 130
      libavcodec/arm/aac.h

12
libavcodec/aac.c
Unescape View File

@ -93,6 +93,10 @@
#include <math.h>
#include <string.h>
#if ARCH_ARM
# include "arm/aac.h"
#endif
union float754 {
float f;
uint32_t i;
@ -862,6 +866,7 @@ static void decode_mid_side_stereo(ChannelElement *cpe, GetBitContext *gb,
}
}
#ifndef VMUL2
static inline float *VMUL2(float *dst, const float *v, unsigned idx,
const float *scale)
{
@ -870,7 +875,9 @@ static inline float *VMUL2(float *dst, const float *v, unsigned idx,
*dst++ = v[idx>>4 & 15] * s;
return dst;
}
#endif
#ifndef VMUL4
static inline float *VMUL4(float *dst, const float *v, unsigned idx,
const float *scale)
{
@ -881,7 +888,9 @@ static inline float *VMUL4(float *dst, const float *v, unsigned idx,
*dst++ = v[idx>>6 & 3] * s;
return dst;
}
#endif
#ifndef VMUL2S
static inline float *VMUL2S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
@ -896,7 +905,9 @@ static inline float *VMUL2S(float *dst, const float *v, unsigned idx,
return dst;
}
#endif
#ifndef VMUL4S
static inline float *VMUL4S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
@ -921,6 +932,7 @@ static inline float *VMUL4S(float *dst, const float *v, unsigned idx,
return dst;
}
#endif
/**
* Decode spectral data; reference: table 4.50.

130
libavcodec/arm/aac.h
Unescape View File

@ -0,0 +1,130 @@
/*
* 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
*/
#if HAVE_NEON && HAVE_INLINE_ASM
#define VMUL2 VMUL2
static inline float *VMUL2(float *dst, const float *v, unsigned idx,
const float *scale)
{
unsigned v0, v1;
__asm__ volatile ("ubfx %0, %4, #0, #4 \n\t"
"ubfx %1, %4, #4, #4 \n\t"
"ldr %0, [%3, %0, lsl #2] \n\t"
"ldr %1, [%3, %1, lsl #2] \n\t"
"vld1.32 {d1[]}, [%5,:32] \n\t"
"vmov d0, %0, %1 \n\t"
"vmul.f32 d0, d0, d1 \n\t"
"vst1.32 {d0}, [%2,:64]! \n\t"
: "=&r"(v0), "=&r"(v1), "+r"(dst)
: "r"(v), "r"(idx), "r"(scale)
: "d0", "d1");
return dst;
}
#define VMUL4 VMUL4
static inline float *VMUL4(float *dst, const float *v, unsigned idx,
const float *scale)
{
unsigned v0, v1, v2, v3;
__asm__ volatile ("ubfx %0, %6, #0, #2 \n\t"
"ubfx %1, %6, #2, #2 \n\t"
"ldr %0, [%5, %0, lsl #2] \n\t"
"ubfx %2, %6, #4, #2 \n\t"
"ldr %1, [%5, %1, lsl #2] \n\t"
"ubfx %3, %6, #6, #2 \n\t"
"ldr %2, [%5, %2, lsl #2] \n\t"
"vmov d0, %0, %1 \n\t"
"ldr %3, [%5, %3, lsl #2] \n\t"
"vld1.32 {d2[],d3[]},[%7,:32] \n\t"
"vmov d1, %2, %3 \n\t"
"vmul.f32 q0, q0, q1 \n\t"
"vst1.32 {q0}, [%4,:128]! \n\t"
: "=&r"(v0), "=&r"(v1), "=&r"(v2), "=&r"(v3), "+r"(dst)
: "r"(v), "r"(idx), "r"(scale)
: "d0", "d1", "d2", "d3");
return dst;
}
#define VMUL2S VMUL2S
static inline float *VMUL2S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
unsigned v0, v1, v2, v3;
__asm__ volatile ("ubfx %0, %6, #0, #4 \n\t"
"ubfx %1, %6, #4, #4 \n\t"
"ldr %0, [%5, %0, lsl #2] \n\t"
"lsl %2, %8, #30 \n\t"
"ldr %1, [%5, %1, lsl #2] \n\t"
"lsl %3, %8, #31 \n\t"
"vmov d0, %0, %1 \n\t"
"bic %2, %2, #1<<30 \n\t"
"vld1.32 {d1[]}, [%7,:32] \n\t"
"vmov d2, %2, %3 \n\t"
"veor d0, d0, d2 \n\t"
"vmul.f32 d0, d0, d1 \n\t"
"vst1.32 {d0}, [%4,:64]! \n\t"
: "=&r"(v0), "=&r"(v1), "=&r"(v2), "=&r"(v3), "+r"(dst)
: "r"(v), "r"(idx), "r"(scale), "r"(sign)
: "d0", "d1", "d2");
return dst;
}
#define VMUL4S VMUL4S
static inline float *VMUL4S(float *dst, const float *v, unsigned idx,
unsigned sign, const float *scale)
{
unsigned v0, v1, v2, v3, nz;
__asm__ volatile ("vld1.32 {d2[],d3[]},[%9,:32] \n\t"
"ubfx %0, %8, #0, #2 \n\t"
"ubfx %1, %8, #2, #2 \n\t"
"ldr %0, [%7, %0, lsl #2] \n\t"
"ubfx %2, %8, #4, #2 \n\t"
"ldr %1, [%7, %1, lsl #2] \n\t"
"ubfx %3, %8, #6, #2 \n\t"
"ldr %2, [%7, %2, lsl #2] \n\t"
"vmov d0, %0, %1 \n\t"
"ldr %3, [%7, %3, lsl #2] \n\t"
"lsr %6, %8, #12 \n\t"
"rbit %6, %6 \n\t"
"vmov d1, %2, %3 \n\t"
"lsls %6, %6, #1 \n\t"
"and %0, %5, #1<<31 \n\t"
"lslcs %5, %5, #1 \n\t"
"lsls %6, %6, #1 \n\t"
"and %1, %5, #1<<31 \n\t"
"lslcs %5, %5, #1 \n\t"
"lsls %6, %6, #1 \n\t"
"and %2, %5, #1<<31 \n\t"
"lslcs %5, %5, #1 \n\t"
"vmov d4, %0, %1 \n\t"
"and %3, %5, #1<<31 \n\t"
"vmov d5, %2, %3 \n\t"
"veor q0, q0, q2 \n\t"
"vmul.f32 q0, q0, q1 \n\t"
"vst1.32 {q0}, [%4,:128]! \n\t"
: "=&r"(v0), "=&r"(v1), "=&r"(v2), "=&r"(v3), "+r"(dst),
"+r"(sign), "=r"(nz)
: "r"(v), "r"(idx), "r"(scale)
: "d0", "d1", "d2", "d3", "d4", "d5");
return dst;
}
#endif /* HAVE_NEON && HAVE_INLINE_ASM */
Write Preview
Loading…
Cancel
Save