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FFmpeg/libswscale/ppc/swscale_vsx.c

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/*
* AltiVec-enhanced yuv2yuvX
*
* Copyright (C) 2004 Romain Dolbeau <romain@dolbeau.org>
* based on the equivalent C code in swscale.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 <inttypes.h>
#include "config.h"
#include "libswscale/swscale.h"
#include "libswscale/swscale_internal.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "yuv2rgb_altivec.h"
#include "libavutil/ppc/util_altivec.h"
#if HAVE_VSX
#define vzero vec_splat_s32(0)
#if !HAVE_BIGENDIAN
#define GET_LS(a,b,c,s) {\
ls = a;\
a = vec_vsx_ld(((b) << 1) + 16, s);\
}
#define yuv2planeX_8(d1, d2, l1, src, x, perm, filter) do {\
vector signed short ls;\
GET_LS(l1, x, perm, src);\
vector signed int i1 = vec_mule(filter, ls);\
vector signed int i2 = vec_mulo(filter, ls);\
vector signed int vf1, vf2;\
vf1 = vec_mergeh(i1, i2);\
vf2 = vec_mergel(i1, i2);\
d1 = vec_add(d1, vf1);\
d2 = vec_add(d2, vf2);\
} while (0)
#define LOAD_FILTER(vf,f) {\
vf = vec_vsx_ld(joffset, f);\
}
#define LOAD_L1(ll1,s,p){\
ll1 = vec_vsx_ld(xoffset, s);\
}
// The 3 above is 2 (filterSize == 4) + 1 (sizeof(short) == 2).
// The neat trick: We only care for half the elements,
// high or low depending on (i<<3)%16 (it's 0 or 8 here),
// and we're going to use vec_mule, so we choose
// carefully how to "unpack" the elements into the even slots.
#define GET_VF4(a, vf, f) {\
vf = (vector signed short)vec_vsx_ld(a << 3, f);\
vf = vec_mergeh(vf, (vector signed short)vzero);\
}
#define FIRST_LOAD(sv, pos, s, per) {}
#define UPDATE_PTR(s0, d0, s1, d1) {}
#define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\
vf = vec_vsx_ld(pos + a, s);\
}
#define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) LOAD_SRCV(pos, a, s, per, v0, v1, vf)
#define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\
vf = vec_vsx_ld((a * 2 * filterSize) + (b * 2) + off, f);\
}
#define FUNC(name) name ## _vsx
#include "swscale_ppc_template.c"
#undef FUNC
#undef vzero
#endif /* !HAVE_BIGENDIAN */
static void yuv2plane1_8_u(const int16_t *src, uint8_t *dest, int dstW,
const uint8_t *dither, int offset, int start)
{
int i;
for (i = start; i < dstW; i++) {
int val = (src[i] + dither[(i + offset) & 7]) >> 7;
dest[i] = av_clip_uint8(val);
}
}
static void yuv2plane1_8_vsx(const int16_t *src, uint8_t *dest, int dstW,
const uint8_t *dither, int offset)
{
const int dst_u = -(uintptr_t)dest & 15;
int i, j;
LOCAL_ALIGNED(16, int16_t, val, [16]);
const vector uint16_t shifts = (vector uint16_t) {7, 7, 7, 7, 7, 7, 7, 7};
vector int16_t vi, vileft, ditherleft, ditherright;
vector uint8_t vd;
for (j = 0; j < 16; j++) {
val[j] = dither[(dst_u + offset + j) & 7];
}
ditherleft = vec_ld(0, val);
ditherright = vec_ld(0, &val[8]);
yuv2plane1_8_u(src, dest, dst_u, dither, offset, 0);
for (i = dst_u; i < dstW - 15; i += 16) {
vi = vec_vsx_ld(0, &src[i]);
vi = vec_adds(ditherleft, vi);
vileft = vec_sra(vi, shifts);
vi = vec_vsx_ld(0, &src[i + 8]);
vi = vec_adds(ditherright, vi);
vi = vec_sra(vi, shifts);
vd = vec_packsu(vileft, vi);
vec_st(vd, 0, &dest[i]);
}
yuv2plane1_8_u(src, dest, dstW, dither, offset, i);
}
#if !HAVE_BIGENDIAN
#define output_pixel(pos, val) \
if (big_endian) { \
AV_WB16(pos, av_clip_uintp2(val >> shift, output_bits)); \
} else { \
AV_WL16(pos, av_clip_uintp2(val >> shift, output_bits)); \
}
static void yuv2plane1_nbps_u(const int16_t *src, uint16_t *dest, int dstW,
int big_endian, int output_bits, int start)
{
int i;
int shift = 15 - output_bits;
for (i = start; i < dstW; i++) {
int val = src[i] + (1 << (shift - 1));
output_pixel(&dest[i], val);
}
}
static void yuv2plane1_nbps_vsx(const int16_t *src, uint16_t *dest, int dstW,
int big_endian, int output_bits)
{
const int dst_u = -(uintptr_t)dest & 7;
const int shift = 15 - output_bits;
const int add = (1 << (shift - 1));
const int clip = (1 << output_bits) - 1;
const vector uint16_t vadd = (vector uint16_t) {add, add, add, add, add, add, add, add};
const vector uint16_t vswap = (vector uint16_t) vec_splat_u16(big_endian ? 8 : 0);
const vector uint16_t vshift = (vector uint16_t) vec_splat_u16(shift);
const vector uint16_t vlargest = (vector uint16_t) {clip, clip, clip, clip, clip, clip, clip, clip};
vector uint16_t v;
int i;
yuv2plane1_nbps_u(src, dest, dst_u, big_endian, output_bits, 0);
for (i = dst_u; i < dstW - 7; i += 8) {
v = vec_vsx_ld(0, (const uint16_t *) &src[i]);
v = vec_add(v, vadd);
v = vec_sr(v, vshift);
v = vec_min(v, vlargest);
v = vec_rl(v, vswap);
vec_st(v, 0, &dest[i]);
}
yuv2plane1_nbps_u(src, dest, dstW, big_endian, output_bits, i);
}
static void yuv2planeX_nbps_u(const int16_t *filter, int filterSize,
const int16_t **src, uint16_t *dest, int dstW,
int big_endian, int output_bits, int start)
{
int i;
int shift = 11 + 16 - output_bits;
for (i = start; i < dstW; i++) {
int val = 1 << (shift - 1);
int j;
for (j = 0; j < filterSize; j++)
val += src[j][i] * filter[j];
output_pixel(&dest[i], val);
}
}
static void yuv2planeX_nbps_vsx(const int16_t *filter, int filterSize,
const int16_t **src, uint16_t *dest, int dstW,
int big_endian, int output_bits)
{
const int dst_u = -(uintptr_t)dest & 7;
const int shift = 11 + 16 - output_bits;
const int add = (1 << (shift - 1));
const int clip = (1 << output_bits) - 1;
const uint16_t swap = big_endian ? 8 : 0;
const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
const vector uint32_t vshift = (vector uint32_t) {shift, shift, shift, shift};
const vector uint16_t vswap = (vector uint16_t) {swap, swap, swap, swap, swap, swap, swap, swap};
const vector uint16_t vlargest = (vector uint16_t) {clip, clip, clip, clip, clip, clip, clip, clip};
const vector int16_t vzero = vec_splat_s16(0);
const vector uint8_t vperm = (vector uint8_t) {0, 1, 8, 9, 2, 3, 10, 11, 4, 5, 12, 13, 6, 7, 14, 15};
vector int16_t vfilter[MAX_FILTER_SIZE], vin;
vector uint16_t v;
vector uint32_t vleft, vright, vtmp;
int i, j;
for (i = 0; i < filterSize; i++) {
vfilter[i] = (vector int16_t) {filter[i], filter[i], filter[i], filter[i],
filter[i], filter[i], filter[i], filter[i]};
}
yuv2planeX_nbps_u(filter, filterSize, src, dest, dst_u, big_endian, output_bits, 0);
for (i = dst_u; i < dstW - 7; i += 8) {
vleft = vright = vadd;
for (j = 0; j < filterSize; j++) {
vin = vec_vsx_ld(0, &src[j][i]);
vtmp = (vector uint32_t) vec_mule(vin, vfilter[j]);
vleft = vec_add(vleft, vtmp);
vtmp = (vector uint32_t) vec_mulo(vin, vfilter[j]);
vright = vec_add(vright, vtmp);
}
vleft = vec_sra(vleft, vshift);
vright = vec_sra(vright, vshift);
v = vec_packsu(vleft, vright);
v = (vector uint16_t) vec_max((vector int16_t) v, vzero);
v = vec_min(v, vlargest);
v = vec_rl(v, vswap);
v = vec_perm(v, v, vperm);
vec_st(v, 0, &dest[i]);
}
yuv2planeX_nbps_u(filter, filterSize, src, dest, dstW, big_endian, output_bits, i);
}
#undef output_pixel
#define output_pixel(pos, val, bias, signedness) \
if (big_endian) { \
AV_WB16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \
} else { \
AV_WL16(pos, bias + av_clip_ ## signedness ## 16(val >> shift)); \
}
static void yuv2plane1_16_u(const int32_t *src, uint16_t *dest, int dstW,
int big_endian, int output_bits, int start)
{
int i;
const int shift = 3;
for (i = start; i < dstW; i++) {
int val = src[i] + (1 << (shift - 1));
output_pixel(&dest[i], val, 0, uint);
}
}
static void yuv2plane1_16_vsx(const int32_t *src, uint16_t *dest, int dstW,
int big_endian, int output_bits)
{
const int dst_u = -(uintptr_t)dest & 7;
const int shift = 3;
const int add = (1 << (shift - 1));
const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
const vector uint16_t vswap = (vector uint16_t) vec_splat_u16(big_endian ? 8 : 0);
const vector uint32_t vshift = (vector uint32_t) vec_splat_u32(shift);
vector uint32_t v, v2;
vector uint16_t vd;
int i;
yuv2plane1_16_u(src, dest, dst_u, big_endian, output_bits, 0);
for (i = dst_u; i < dstW - 7; i += 8) {
v = vec_vsx_ld(0, (const uint32_t *) &src[i]);
v = vec_add(v, vadd);
v = vec_sr(v, vshift);
v2 = vec_vsx_ld(0, (const uint32_t *) &src[i + 4]);
v2 = vec_add(v2, vadd);
v2 = vec_sr(v2, vshift);
vd = vec_packsu(v, v2);
vd = vec_rl(vd, vswap);
vec_st(vd, 0, &dest[i]);
}
yuv2plane1_16_u(src, dest, dstW, big_endian, output_bits, i);
}
#if HAVE_POWER8
static void yuv2planeX_16_u(const int16_t *filter, int filterSize,
const int32_t **src, uint16_t *dest, int dstW,
int big_endian, int output_bits, int start)
{
int i;
int shift = 15;
for (i = start; i < dstW; i++) {
int val = 1 << (shift - 1);
int j;
/* range of val is [0,0x7FFFFFFF], so 31 bits, but with lanczos/spline
* filters (or anything with negative coeffs, the range can be slightly
* wider in both directions. To account for this overflow, we subtract
* a constant so it always fits in the signed range (assuming a
* reasonable filterSize), and re-add that at the end. */
val -= 0x40000000;
for (j = 0; j < filterSize; j++)
val += src[j][i] * (unsigned)filter[j];
output_pixel(&dest[i], val, 0x8000, int);
}
}
static void yuv2planeX_16_vsx(const int16_t *filter, int filterSize,
const int32_t **src, uint16_t *dest, int dstW,
int big_endian, int output_bits)
{
const int dst_u = -(uintptr_t)dest & 7;
const int shift = 15;
const int bias = 0x8000;
const int add = (1 << (shift - 1)) - 0x40000000;
const uint16_t swap = big_endian ? 8 : 0;
const vector uint32_t vadd = (vector uint32_t) {add, add, add, add};
const vector uint32_t vshift = (vector uint32_t) {shift, shift, shift, shift};
const vector uint16_t vswap = (vector uint16_t) {swap, swap, swap, swap, swap, swap, swap, swap};
const vector uint16_t vbias = (vector uint16_t) {bias, bias, bias, bias, bias, bias, bias, bias};
vector int32_t vfilter[MAX_FILTER_SIZE];
vector uint16_t v;
vector uint32_t vleft, vright, vtmp;
vector int32_t vin32l, vin32r;
int i, j;
for (i = 0; i < filterSize; i++) {
vfilter[i] = (vector int32_t) {filter[i], filter[i], filter[i], filter[i]};
}
yuv2planeX_16_u(filter, filterSize, src, dest, dst_u, big_endian, output_bits, 0);
for (i = dst_u; i < dstW - 7; i += 8) {
vleft = vright = vadd;
for (j = 0; j < filterSize; j++) {
vin32l = vec_vsx_ld(0, &src[j][i]);
vin32r = vec_vsx_ld(0, &src[j][i + 4]);
vtmp = (vector uint32_t) vec_mul(vin32l, vfilter[j]);
vleft = vec_add(vleft, vtmp);
vtmp = (vector uint32_t) vec_mul(vin32r, vfilter[j]);
vright = vec_add(vright, vtmp);
}
vleft = vec_sra(vleft, vshift);
vright = vec_sra(vright, vshift);
v = (vector uint16_t) vec_packs((vector int32_t) vleft, (vector int32_t) vright);
v = vec_add(v, vbias);
v = vec_rl(v, vswap);
vec_st(v, 0, &dest[i]);
}
yuv2planeX_16_u(filter, filterSize, src, dest, dstW, big_endian, output_bits, i);
}
#endif /* HAVE_POWER8 */
#define yuv2NBPS(bits, BE_LE, is_be, template_size, typeX_t) \
yuv2NBPS1(bits, BE_LE, is_be, template_size, typeX_t) \
yuv2NBPSX(bits, BE_LE, is_be, template_size, typeX_t)
#define yuv2NBPS1(bits, BE_LE, is_be, template_size, typeX_t) \
static void yuv2plane1_ ## bits ## BE_LE ## _vsx(const int16_t *src, \
uint8_t *dest, int dstW, \
const uint8_t *dither, int offset) \
{ \
yuv2plane1_ ## template_size ## _vsx((const typeX_t *) src, \
(uint16_t *) dest, dstW, is_be, bits); \
}
#define yuv2NBPSX(bits, BE_LE, is_be, template_size, typeX_t) \
static void yuv2planeX_ ## bits ## BE_LE ## _vsx(const int16_t *filter, int filterSize, \
const int16_t **src, uint8_t *dest, int dstW, \
const uint8_t *dither, int offset)\
{ \
yuv2planeX_## template_size ## _vsx(filter, \
filterSize, (const typeX_t **) src, \
(uint16_t *) dest, dstW, is_be, bits); \
}
yuv2NBPS( 9, BE, 1, nbps, int16_t)
yuv2NBPS( 9, LE, 0, nbps, int16_t)
yuv2NBPS(10, BE, 1, nbps, int16_t)
yuv2NBPS(10, LE, 0, nbps, int16_t)
yuv2NBPS(12, BE, 1, nbps, int16_t)
yuv2NBPS(12, LE, 0, nbps, int16_t)
yuv2NBPS(14, BE, 1, nbps, int16_t)
yuv2NBPS(14, LE, 0, nbps, int16_t)
yuv2NBPS1(16, BE, 1, 16, int32_t)
yuv2NBPS1(16, LE, 0, 16, int32_t)
#if HAVE_POWER8
yuv2NBPSX(16, BE, 1, 16, int32_t)
yuv2NBPSX(16, LE, 0, 16, int32_t)
#endif
#endif /* !HAVE_BIGENDIAN */
#endif /* HAVE_VSX */
av_cold void ff_sws_init_swscale_vsx(SwsContext *c)
{
#if HAVE_VSX
enum AVPixelFormat dstFormat = c->dstFormat;
const int cpu_flags = av_get_cpu_flags();
if (!(cpu_flags & AV_CPU_FLAG_VSX))
return;
#if !HAVE_BIGENDIAN
if (c->srcBpc == 8 && c->dstBpc <= 14) {
c->hyScale = c->hcScale = hScale_real_vsx;
}
if (!is16BPS(dstFormat) && !isNBPS(dstFormat) &&
dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
dstFormat != AV_PIX_FMT_GRAYF32BE && dstFormat != AV_PIX_FMT_GRAYF32LE &&
!c->needAlpha) {
c->yuv2planeX = yuv2planeX_vsx;
}
#endif
if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) {
switch (c->dstBpc) {
case 8:
c->yuv2plane1 = yuv2plane1_8_vsx;
break;
#if !HAVE_BIGENDIAN
case 9:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_9BE_vsx : yuv2plane1_9LE_vsx;
c->yuv2planeX = isBE(dstFormat) ? yuv2planeX_9BE_vsx : yuv2planeX_9LE_vsx;
break;
case 10:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_10BE_vsx : yuv2plane1_10LE_vsx;
c->yuv2planeX = isBE(dstFormat) ? yuv2planeX_10BE_vsx : yuv2planeX_10LE_vsx;
break;
case 12:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_12BE_vsx : yuv2plane1_12LE_vsx;
c->yuv2planeX = isBE(dstFormat) ? yuv2planeX_12BE_vsx : yuv2planeX_12LE_vsx;
break;
case 14:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_14BE_vsx : yuv2plane1_14LE_vsx;
c->yuv2planeX = isBE(dstFormat) ? yuv2planeX_14BE_vsx : yuv2planeX_14LE_vsx;
break;
case 16:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_16BE_vsx : yuv2plane1_16LE_vsx;
#if HAVE_POWER8
if (cpu_flags & AV_CPU_FLAG_POWER8) {
c->yuv2planeX = isBE(dstFormat) ? yuv2planeX_16BE_vsx : yuv2planeX_16LE_vsx;
}
#endif /* HAVE_POWER8 */
break;
#endif /* !HAVE_BIGENDIAN */
}
}
#endif /* HAVE_VSX */
}