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/*
* Copyright (c) 2006 Luca Barbato <lu_zero@gentoo.org>
*
* 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 "libavcodec/fmtconvert.h"
#include "dsputil_altivec.h"
#include "util_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_ppc(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;
}
}
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