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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_ALTIVEC && HAVE_BIGENDIAN
#define vzero vec_splat_s32(0)
#define GET_LS(a,b,c,s) {\
vector signed short l2 = vec_ld(((b) << 1) + 16, s);\
ls = vec_perm(a, l2, c);\
a = l2;\
}
#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) {\
vector unsigned char perm0 = vec_lvsl(joffset, f);\
vf = vec_ld(joffset, f);\
vf = vec_perm(vf, vf, perm0);\
}
#define LOAD_L1(ll1,s,p){\
p = vec_lvsl(xoffset, s);\
ll1 = vec_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 = vec_ld(a<< 3, f);\
if ((a << 3) % 16)\
vf = vec_mergel(vf, (vector signed short)vzero);\
else\
vf = vec_mergeh(vf, (vector signed short)vzero);\
}
#define FIRST_LOAD(sv, pos, s, per) {\
sv = vec_ld(pos, s);\
per = vec_lvsl(pos, s);\
}
#define UPDATE_PTR(s0, d0, s1, d1) {\
d0 = s0;\
d1 = s1;\
}
#define LOAD_SRCV(pos, a, s, per, v0, v1, vf) {\
v1 = vec_ld(pos + a + 16, s);\
vf = vec_perm(v0, v1, per);\
}
#define LOAD_SRCV8(pos, a, s, per, v0, v1, vf) {\
if ((((uintptr_t)s + pos) % 16) > 8) {\
v1 = vec_ld(pos + a + 16, s);\
}\
vf = vec_perm(v0, src_v1, per);\
}
#define GET_VFD(a, b, f, vf0, vf1, per, vf, off) {\
vf1 = vec_ld((a * 2 * filterSize) + (b * 2) + 16 + off, f);\
vf = vec_perm(vf0, vf1, per);\
}
#define FUNC(name) name ## _altivec
#include "swscale_ppc_template.c"
#undef FUNC
#endif /* HAVE_ALTIVEC && HAVE_BIGENDIAN */
av_cold void ff_sws_init_swscale_ppc(SwsContext *c)
{
#if HAVE_ALTIVEC
enum AVPixelFormat dstFormat = c->dstFormat;
if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
return;
#if HAVE_BIGENDIAN
if (c->srcBpc == 8 && c->dstBpc <= 14) {
c->hyScale = c->hcScale = hScale_real_altivec;
}
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_altivec;
}
#endif
/* The following list of supported dstFormat values should
* match what's found in the body of ff_yuv2packedX_altivec() */
if (!(c->flags & (SWS_BITEXACT | SWS_FULL_CHR_H_INT)) && !c->needAlpha) {
switch (c->dstFormat) {
case AV_PIX_FMT_ABGR:
c->yuv2packedX = ff_yuv2abgr_X_altivec;
break;
case AV_PIX_FMT_BGRA:
c->yuv2packedX = ff_yuv2bgra_X_altivec;
break;
case AV_PIX_FMT_ARGB:
c->yuv2packedX = ff_yuv2argb_X_altivec;
break;
case AV_PIX_FMT_RGBA:
c->yuv2packedX = ff_yuv2rgba_X_altivec;
break;
case AV_PIX_FMT_BGR24:
c->yuv2packedX = ff_yuv2bgr24_X_altivec;
break;
case AV_PIX_FMT_RGB24:
c->yuv2packedX = ff_yuv2rgb24_X_altivec;
break;
}
}
#endif /* HAVE_ALTIVEC */
ff_sws_init_swscale_vsx(c);
}
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