145 lines
4.8 KiB
C
145 lines
4.8 KiB
C
/*
|
|
* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "libavcodec/fmtconvert.h"
|
|
|
|
#include "libavutil/ppc/util_altivec.h"
|
|
#include "dsputil_altivec.h"
|
|
|
|
static void int32_to_float_fmul_scalar_altivec(float *dst, const int *src,
|
|
float mul, int len)
|
|
{
|
|
union {
|
|
vector float v;
|
|
float s[4];
|
|
} mul_u;
|
|
int i;
|
|
vector float src1, src2, dst1, dst2, mul_v, zero;
|
|
|
|
zero = (vector float)vec_splat_u32(0);
|
|
mul_u.s[0] = mul;
|
|
mul_v = vec_splat(mul_u.v, 0);
|
|
|
|
for (i = 0; i < len; i += 8) {
|
|
src1 = vec_ctf(vec_ld(0, src+i), 0);
|
|
src2 = vec_ctf(vec_ld(16, src+i), 0);
|
|
dst1 = vec_madd(src1, mul_v, zero);
|
|
dst2 = vec_madd(src2, mul_v, zero);
|
|
vec_st(dst1, 0, dst+i);
|
|
vec_st(dst2, 16, dst+i);
|
|
}
|
|
}
|
|
|
|
|
|
static vector signed short float_to_int16_one_altivec(const float *src)
|
|
{
|
|
vector float s0 = vec_ld(0, src);
|
|
vector float s1 = vec_ld(16, src);
|
|
vector signed int t0 = vec_cts(s0, 0);
|
|
vector signed int t1 = vec_cts(s1, 0);
|
|
return vec_packs(t0,t1);
|
|
}
|
|
|
|
static void float_to_int16_altivec(int16_t *dst, const float *src, long len)
|
|
{
|
|
int i;
|
|
vector signed short d0, d1, d;
|
|
vector unsigned char align;
|
|
if (((long)dst) & 15) { //FIXME
|
|
for (i = 0; i < len - 7; i += 8) {
|
|
d0 = vec_ld(0, dst+i);
|
|
d = float_to_int16_one_altivec(src + i);
|
|
d1 = vec_ld(15, dst+i);
|
|
d1 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
|
|
align = vec_lvsr(0, dst + i);
|
|
d0 = vec_perm(d1, d, align);
|
|
d1 = vec_perm(d, d1, align);
|
|
vec_st(d0, 0, dst + i);
|
|
vec_st(d1, 15, dst + i);
|
|
}
|
|
} else {
|
|
for (i = 0; i < len - 7; i += 8) {
|
|
d = float_to_int16_one_altivec(src + i);
|
|
vec_st(d, 0, dst + i);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void float_to_int16_interleave_altivec(int16_t *dst, const float **src,
|
|
long len, int channels)
|
|
{
|
|
int i;
|
|
vector signed short d0, d1, d2, c0, c1, t0, t1;
|
|
vector unsigned char align;
|
|
|
|
if (channels == 1)
|
|
float_to_int16_altivec(dst, src[0], len);
|
|
else {
|
|
if (channels == 2) {
|
|
if (((long)dst) & 15) {
|
|
for (i = 0; i < len - 7; i += 8) {
|
|
d0 = vec_ld(0, dst + i);
|
|
t0 = float_to_int16_one_altivec(src[0] + i);
|
|
d1 = vec_ld(31, dst + i);
|
|
t1 = float_to_int16_one_altivec(src[1] + i);
|
|
c0 = vec_mergeh(t0, t1);
|
|
c1 = vec_mergel(t0, t1);
|
|
d2 = vec_perm(d1, d0, vec_lvsl(0, dst + i));
|
|
align = vec_lvsr(0, dst + i);
|
|
d0 = vec_perm(d2, c0, align);
|
|
d1 = vec_perm(c0, c1, align);
|
|
vec_st(d0, 0, dst + i);
|
|
d0 = vec_perm(c1, d2, align);
|
|
vec_st(d1, 15, dst + i);
|
|
vec_st(d0, 31, dst + i);
|
|
dst += 8;
|
|
}
|
|
} else {
|
|
for (i = 0; i < len - 7; i += 8) {
|
|
t0 = float_to_int16_one_altivec(src[0] + i);
|
|
t1 = float_to_int16_one_altivec(src[1] + i);
|
|
d0 = vec_mergeh(t0, t1);
|
|
d1 = vec_mergel(t0, t1);
|
|
vec_st(d0, 0, dst + i);
|
|
vec_st(d1, 16, dst + i);
|
|
dst += 8;
|
|
}
|
|
}
|
|
} else {
|
|
DECLARE_ALIGNED(16, int16_t, tmp)[len];
|
|
int c, j;
|
|
for (c = 0; c < channels; c++) {
|
|
float_to_int16_altivec(tmp, src[c], len);
|
|
for (i = 0, j = c; i < len; i++, j+=channels)
|
|
dst[j] = tmp[i];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void ff_fmt_convert_init_altivec(FmtConvertContext *c, AVCodecContext *avctx)
|
|
{
|
|
c->int32_to_float_fmul_scalar = int32_to_float_fmul_scalar_altivec;
|
|
if (!(avctx->flags & CODEC_FLAG_BITEXACT)) {
|
|
c->float_to_int16 = float_to_int16_altivec;
|
|
c->float_to_int16_interleave = float_to_int16_interleave_altivec;
|
|
}
|
|
}
|