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yuv2rgb_altivec.c
855 lines (775 loc) · 36.8 KB
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yuv2rgb_altivec.c
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/*
* AltiVec acceleration for colorspace conversion
*
* copyright (C) 2004 Marc Hoffman <marc.hoffman@analog.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
*/
/*
* Convert I420 YV12 to RGB in various formats,
* it rejects images that are not in 420 formats,
* it rejects images that don't have widths of multiples of 16,
* it rejects images that don't have heights of multiples of 2.
* Reject defers to C simulation code.
*
* Lots of optimizations to be done here.
*
* 1. Need to fix saturation code. I just couldn't get it to fly with packs
* and adds, so we currently use max/min to clip.
*
* 2. The inefficient use of chroma loading needs a bit of brushing up.
*
* 3. Analysis of pipeline stalls needs to be done. Use shark to identify
* pipeline stalls.
*
*
* MODIFIED to calculate coeffs from currently selected color space.
* MODIFIED core to be a macro where you specify the output format.
* ADDED UYVY conversion which is never called due to some thing in swscale.
* CORRECTED algorithim selection to be strict on input formats.
* ADDED runtime detection of AltiVec.
*
* ADDED altivec_yuv2packedX vertical scl + RGB converter
*
* March 27,2004
* PERFORMANCE ANALYSIS
*
* The C version uses 25% of the processor or ~250Mips for D1 video rawvideo
* used as test.
* The AltiVec version uses 10% of the processor or ~100Mips for D1 video
* same sequence.
*
* 720 * 480 * 30 ~10MPS
*
* so we have roughly 10 clocks per pixel. This is too high, something has
* to be wrong.
*
* OPTIMIZED clip codes to utilize vec_max and vec_packs removing the
* need for vec_min.
*
* OPTIMIZED DST OUTPUT cache/DMA controls. We are pretty much guaranteed to
* have the input video frame, it was just decompressed so it probably resides
* in L1 caches. However, we are creating the output video stream. This needs
* to use the DSTST instruction to optimize for the cache. We couple this with
* the fact that we are not going to be visiting the input buffer again so we
* mark it Least Recently Used. This shaves 25% of the processor cycles off.
*
* Now memcpy is the largest mips consumer in the system, probably due
* to the inefficient X11 stuff.
*
* GL libraries seem to be very slow on this machine 1.33Ghz PB running
* Jaguar, this is not the case for my 1Ghz PB. I thought it might be
* a versioning issue, however I have libGL.1.2.dylib for both
* machines. (We need to figure this out now.)
*
* GL2 libraries work now with patch for RGB32.
*
* NOTE: quartz vo driver ARGB32_to_RGB24 consumes 30% of the processor.
*
* Integrated luma prescaling adjustment for saturation/contrast/brightness
* adjustment.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include "config.h"
#include "libswscale/rgb2rgb.h"
#include "libswscale/swscale.h"
#include "libswscale/swscale_internal.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/pixdesc.h"
#include "yuv2rgb_altivec.h"
#if HAVE_ALTIVEC
#undef PROFILE_THE_BEAST
#undef INC_SCALING
typedef unsigned char ubyte;
typedef signed char sbyte;
/* RGB interleaver, 16 planar pels 8-bit samples per channel in
* homogeneous vector registers x0,x1,x2 are interleaved with the
* following technique:
*
* o0 = vec_mergeh(x0, x1);
* o1 = vec_perm(o0, x2, perm_rgb_0);
* o2 = vec_perm(o0, x2, perm_rgb_1);
* o3 = vec_mergel(x0, x1);
* o4 = vec_perm(o3, o2, perm_rgb_2);
* o5 = vec_perm(o3, o2, perm_rgb_3);
*
* perm_rgb_0: o0(RG).h v1(B) --> o1*
* 0 1 2 3 4
* rgbr|gbrg|brgb|rgbr
* 0010 0100 1001 0010
* 0102 3145 2673 894A
*
* perm_rgb_1: o0(RG).h v1(B) --> o2
* 0 1 2 3 4
* gbrg|brgb|bbbb|bbbb
* 0100 1001 1111 1111
* B5CD 6EF7 89AB CDEF
*
* perm_rgb_2: o3(RG).l o2(rgbB.l) --> o4*
* 0 1 2 3 4
* gbrg|brgb|rgbr|gbrg
* 1111 1111 0010 0100
* 89AB CDEF 0182 3945
*
* perm_rgb_2: o3(RG).l o2(rgbB.l) ---> o5*
* 0 1 2 3 4
* brgb|rgbr|gbrg|brgb
* 1001 0010 0100 1001
* a67b 89cA BdCD eEFf
*/
static const vector unsigned char
perm_rgb_0 = { 0x00, 0x01, 0x10, 0x02, 0x03, 0x11, 0x04, 0x05,
0x12, 0x06, 0x07, 0x13, 0x08, 0x09, 0x14, 0x0a },
perm_rgb_1 = { 0x0b, 0x15, 0x0c, 0x0d, 0x16, 0x0e, 0x0f, 0x17,
0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f },
perm_rgb_2 = { 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0x00, 0x01, 0x18, 0x02, 0x03, 0x19, 0x04, 0x05 },
perm_rgb_3 = { 0x1a, 0x06, 0x07, 0x1b, 0x08, 0x09, 0x1c, 0x0a,
0x0b, 0x1d, 0x0c, 0x0d, 0x1e, 0x0e, 0x0f, 0x1f };
#define vec_merge3(x2, x1, x0, y0, y1, y2) \
do { \
__typeof__(x0) o0, o2, o3; \
o0 = vec_mergeh(x0, x1); \
y0 = vec_perm(o0, x2, perm_rgb_0); \
o2 = vec_perm(o0, x2, perm_rgb_1); \
o3 = vec_mergel(x0, x1); \
y1 = vec_perm(o3, o2, perm_rgb_2); \
y2 = vec_perm(o3, o2, perm_rgb_3); \
} while (0)
#define vec_mstbgr24(x0, x1, x2, ptr) \
do { \
__typeof__(x0) _0, _1, _2; \
vec_merge3(x0, x1, x2, _0, _1, _2); \
vec_st(_0, 0, ptr++); \
vec_st(_1, 0, ptr++); \
vec_st(_2, 0, ptr++); \
} while (0)
#define vec_mstrgb24(x0, x1, x2, ptr) \
do { \
__typeof__(x0) _0, _1, _2; \
vec_merge3(x2, x1, x0, _0, _1, _2); \
vec_st(_0, 0, ptr++); \
vec_st(_1, 0, ptr++); \
vec_st(_2, 0, ptr++); \
} while (0)
/* pack the pixels in rgb0 format
* msb R
* lsb 0
*/
#define vec_mstrgb32(T, x0, x1, x2, x3, ptr) \
do { \
T _0, _1, _2, _3; \
_0 = vec_mergeh(x0, x1); \
_1 = vec_mergeh(x2, x3); \
_2 = (T) vec_mergeh((vector unsigned short) _0, \
(vector unsigned short) _1); \
_3 = (T) vec_mergel((vector unsigned short) _0, \
(vector unsigned short) _1); \
vec_st(_2, 0 * 16, (T *) ptr); \
vec_st(_3, 1 * 16, (T *) ptr); \
_0 = vec_mergel(x0, x1); \
_1 = vec_mergel(x2, x3); \
_2 = (T) vec_mergeh((vector unsigned short) _0, \
(vector unsigned short) _1); \
_3 = (T) vec_mergel((vector unsigned short) _0, \
(vector unsigned short) _1); \
vec_st(_2, 2 * 16, (T *) ptr); \
vec_st(_3, 3 * 16, (T *) ptr); \
ptr += 4; \
} while (0)
/*
* 1 0 1.4021 | | Y |
* 1 -0.3441 -0.7142 |x| Cb|
* 1 1.7718 0 | | Cr|
*
*
* Y: [-128 127]
* Cb/Cr : [-128 127]
*
* typical YUV conversion works on Y: 0-255 this version has been
* optimized for JPEG decoding.
*/
#if HAVE_BIGENDIAN
#define vec_unh(x) \
(vector signed short) \
vec_perm(x, (__typeof__(x)) { 0 }, \
((vector unsigned char) { \
0x10, 0x00, 0x10, 0x01, 0x10, 0x02, 0x10, 0x03, \
0x10, 0x04, 0x10, 0x05, 0x10, 0x06, 0x10, 0x07 }))
#define vec_unl(x) \
(vector signed short) \
vec_perm(x, (__typeof__(x)) { 0 }, \
((vector unsigned char) { \
0x10, 0x08, 0x10, 0x09, 0x10, 0x0A, 0x10, 0x0B, \
0x10, 0x0C, 0x10, 0x0D, 0x10, 0x0E, 0x10, 0x0F }))
#else
#define vec_unh(x)(vector signed short) vec_mergeh(x,(__typeof__(x)) { 0 })
#define vec_unl(x)(vector signed short) vec_mergel(x,(__typeof__(x)) { 0 })
#endif
#define vec_clip_s16(x) \
vec_max(vec_min(x, ((vector signed short) { \
235, 235, 235, 235, 235, 235, 235, 235 })), \
((vector signed short) { 16, 16, 16, 16, 16, 16, 16, 16 }))
#define vec_packclp(x, y) \
(vector unsigned char) \
vec_packs((vector unsigned short) \
vec_max(x, ((vector signed short) { 0 })), \
(vector unsigned short) \
vec_max(y, ((vector signed short) { 0 })))
static inline void cvtyuvtoRGB(SwsContext *c, vector signed short Y,
vector signed short U, vector signed short V,
vector signed short *R, vector signed short *G,
vector signed short *B)
{
vector signed short vx, ux, uvx;
Y = vec_mradds(Y, c->CY, c->OY);
U = vec_sub(U, (vector signed short)
vec_splat((vector signed short) { 128 }, 0));
V = vec_sub(V, (vector signed short)
vec_splat((vector signed short) { 128 }, 0));
// ux = (CBU * (u << c->CSHIFT) + 0x4000) >> 15;
ux = vec_sl(U, c->CSHIFT);
*B = vec_mradds(ux, c->CBU, Y);
// vx = (CRV * (v << c->CSHIFT) + 0x4000) >> 15;
vx = vec_sl(V, c->CSHIFT);
*R = vec_mradds(vx, c->CRV, Y);
// uvx = ((CGU * u) + (CGV * v)) >> 15;
uvx = vec_mradds(U, c->CGU, Y);
*G = vec_mradds(V, c->CGV, uvx);
}
/*
* ------------------------------------------------------------------------------
* CS converters
* ------------------------------------------------------------------------------
*/
#define DEFCSP420_CVT(name, out_pixels) \
static int altivec_ ## name(SwsContext *c, const unsigned char **in, \
int *instrides, int srcSliceY, int srcSliceH, \
unsigned char **oplanes, int *outstrides) \
{ \
int w = c->srcW; \
int h = srcSliceH; \
int i, j; \
int instrides_scl[3]; \
vector unsigned char y0, y1; \
\
vector signed char u, v; \
\
vector signed short Y0, Y1, Y2, Y3; \
vector signed short U, V; \
vector signed short vx, ux, uvx; \
vector signed short vx0, ux0, uvx0; \
vector signed short vx1, ux1, uvx1; \
vector signed short R0, G0, B0; \
vector signed short R1, G1, B1; \
vector unsigned char R, G, B; \
\
vector signed short lCY = c->CY; \
vector signed short lOY = c->OY; \
vector signed short lCRV = c->CRV; \
vector signed short lCBU = c->CBU; \
vector signed short lCGU = c->CGU; \
vector signed short lCGV = c->CGV; \
vector unsigned short lCSHIFT = c->CSHIFT; \
\
const ubyte *y1i = in[0]; \
const ubyte *y2i = in[0] + instrides[0]; \
const ubyte *ui = in[1]; \
const ubyte *vi = in[2]; \
\
vector unsigned char *oute, *outo; \
\
/* loop moves y{1, 2}i by w */ \
instrides_scl[0] = instrides[0] * 2 - w; \
/* loop moves ui by w / 2 */ \
instrides_scl[1] = instrides[1] - w / 2; \
/* loop moves vi by w / 2 */ \
instrides_scl[2] = instrides[2] - w / 2; \
\
for (i = 0; i < h / 2; i++) { \
oute = (vector unsigned char *)(oplanes[0] + outstrides[0] * \
(srcSliceY + i * 2)); \
outo = oute + (outstrides[0] >> 4); \
vec_dstst(outo, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 0); \
vec_dstst(oute, (0x02000002 | (((w * 3 + 32) / 32) << 16)), 1); \
\
for (j = 0; j < w / 16; j++) { \
y0 = vec_xl(0, y1i); \
\
y1 = vec_xl(0, y2i); \
\
u = (vector signed char) vec_xl(0, ui); \
\
v = (vector signed char) vec_xl(0, vi); \
\
u = (vector signed char) \
vec_sub(u, \
(vector signed char) \
vec_splat((vector signed char) { 128 }, 0)); \
v = (vector signed char) \
vec_sub(v, \
(vector signed char) \
vec_splat((vector signed char) { 128 }, 0)); \
\
U = vec_unpackh(u); \
V = vec_unpackh(v); \
\
Y0 = vec_unh(y0); \
Y1 = vec_unl(y0); \
Y2 = vec_unh(y1); \
Y3 = vec_unl(y1); \
\
Y0 = vec_mradds(Y0, lCY, lOY); \
Y1 = vec_mradds(Y1, lCY, lOY); \
Y2 = vec_mradds(Y2, lCY, lOY); \
Y3 = vec_mradds(Y3, lCY, lOY); \
\
/* ux = (CBU * (u << CSHIFT) + 0x4000) >> 15 */ \
ux = vec_sl(U, lCSHIFT); \
ux = vec_mradds(ux, lCBU, (vector signed short) { 0 }); \
ux0 = vec_mergeh(ux, ux); \
ux1 = vec_mergel(ux, ux); \
\
/* vx = (CRV * (v << CSHIFT) + 0x4000) >> 15; */ \
vx = vec_sl(V, lCSHIFT); \
vx = vec_mradds(vx, lCRV, (vector signed short) { 0 }); \
vx0 = vec_mergeh(vx, vx); \
vx1 = vec_mergel(vx, vx); \
\
/* uvx = ((CGU * u) + (CGV * v)) >> 15 */ \
uvx = vec_mradds(U, lCGU, (vector signed short) { 0 }); \
uvx = vec_mradds(V, lCGV, uvx); \
uvx0 = vec_mergeh(uvx, uvx); \
uvx1 = vec_mergel(uvx, uvx); \
\
R0 = vec_add(Y0, vx0); \
G0 = vec_add(Y0, uvx0); \
B0 = vec_add(Y0, ux0); \
R1 = vec_add(Y1, vx1); \
G1 = vec_add(Y1, uvx1); \
B1 = vec_add(Y1, ux1); \
\
R = vec_packclp(R0, R1); \
G = vec_packclp(G0, G1); \
B = vec_packclp(B0, B1); \
\
out_pixels(R, G, B, oute); \
\
R0 = vec_add(Y2, vx0); \
G0 = vec_add(Y2, uvx0); \
B0 = vec_add(Y2, ux0); \
R1 = vec_add(Y3, vx1); \
G1 = vec_add(Y3, uvx1); \
B1 = vec_add(Y3, ux1); \
R = vec_packclp(R0, R1); \
G = vec_packclp(G0, G1); \
B = vec_packclp(B0, B1); \
\
\
out_pixels(R, G, B, outo); \
\
y1i += 16; \
y2i += 16; \
ui += 8; \
vi += 8; \
} \
\
ui += instrides_scl[1]; \
vi += instrides_scl[2]; \
y1i += instrides_scl[0]; \
y2i += instrides_scl[0]; \
} \
return srcSliceH; \
}
#define out_abgr(a, b, c, ptr) \
vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), c, b, a, ptr)
#define out_bgra(a, b, c, ptr) \
vec_mstrgb32(__typeof__(a), c, b, a, ((__typeof__(a)) { 255 }), ptr)
#define out_rgba(a, b, c, ptr) \
vec_mstrgb32(__typeof__(a), a, b, c, ((__typeof__(a)) { 255 }), ptr)
#define out_argb(a, b, c, ptr) \
vec_mstrgb32(__typeof__(a), ((__typeof__(a)) { 255 }), a, b, c, ptr)
#define out_rgb24(a, b, c, ptr) vec_mstrgb24(a, b, c, ptr)
#define out_bgr24(a, b, c, ptr) vec_mstbgr24(a, b, c, ptr)
DEFCSP420_CVT(yuv2_abgr, out_abgr)
DEFCSP420_CVT(yuv2_bgra, out_bgra)
DEFCSP420_CVT(yuv2_rgba, out_rgba)
DEFCSP420_CVT(yuv2_argb, out_argb)
DEFCSP420_CVT(yuv2_rgb24, out_rgb24)
DEFCSP420_CVT(yuv2_bgr24, out_bgr24)
// uyvy|uyvy|uyvy|uyvy
// 0123 4567 89ab cdef
static const vector unsigned char
demux_u = { 0x10, 0x00, 0x10, 0x00,
0x10, 0x04, 0x10, 0x04,
0x10, 0x08, 0x10, 0x08,
0x10, 0x0c, 0x10, 0x0c },
demux_v = { 0x10, 0x02, 0x10, 0x02,
0x10, 0x06, 0x10, 0x06,
0x10, 0x0A, 0x10, 0x0A,
0x10, 0x0E, 0x10, 0x0E },
demux_y = { 0x10, 0x01, 0x10, 0x03,
0x10, 0x05, 0x10, 0x07,
0x10, 0x09, 0x10, 0x0B,
0x10, 0x0D, 0x10, 0x0F };
/*
* this is so I can play live CCIR raw video
*/
static int altivec_uyvy_rgb32(SwsContext *c, const unsigned char **in,
int *instrides, int srcSliceY, int srcSliceH,
unsigned char **oplanes, int *outstrides)
{
int w = c->srcW;
int h = srcSliceH;
int i, j;
vector unsigned char uyvy;
vector signed short Y, U, V;
vector signed short R0, G0, B0, R1, G1, B1;
vector unsigned char R, G, B;
vector unsigned char *out;
const ubyte *img;
img = in[0];
out = (vector unsigned char *) (oplanes[0] + srcSliceY * outstrides[0]);
for (i = 0; i < h; i++)
for (j = 0; j < w / 16; j++) {
uyvy = vec_ld(0, img);
U = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
V = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
Y = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
cvtyuvtoRGB(c, Y, U, V, &R0, &G0, &B0);
uyvy = vec_ld(16, img);
U = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_u);
V = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_v);
Y = (vector signed short)
vec_perm(uyvy, (vector unsigned char) { 0 }, demux_y);
cvtyuvtoRGB(c, Y, U, V, &R1, &G1, &B1);
R = vec_packclp(R0, R1);
G = vec_packclp(G0, G1);
B = vec_packclp(B0, B1);
// vec_mstbgr24 (R,G,B, out);
out_rgba(R, G, B, out);
img += 32;
}
return srcSliceH;
}
#endif /* HAVE_ALTIVEC */
/* Ok currently the acceleration routine only supports
* inputs of widths a multiple of 16
* and heights a multiple 2
*
* So we just fall back to the C codes for this.
*/
av_cold SwsFunc ff_yuv2rgb_init_ppc(SwsContext *c)
{
#if HAVE_ALTIVEC
if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
return NULL;
/*
* and this seems not to matter too much I tried a bunch of
* videos with abnormal widths and MPlayer crashes elsewhere.
* mplayer -vo x11 -rawvideo on:w=350:h=240 raw-350x240.eyuv
* boom with X11 bad match.
*
*/
if ((c->srcW & 0xf) != 0)
return NULL;
switch (c->srcFormat) {
case AV_PIX_FMT_YUV410P:
case AV_PIX_FMT_YUV420P:
/*case IMGFMT_CLPL: ??? */
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_NV12:
case AV_PIX_FMT_NV21:
if ((c->srcH & 0x1) != 0)
return NULL;
switch (c->dstFormat) {
case AV_PIX_FMT_RGB24:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGB24\n");
return altivec_yuv2_rgb24;
case AV_PIX_FMT_BGR24:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGR24\n");
return altivec_yuv2_bgr24;
case AV_PIX_FMT_ARGB:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ARGB\n");
return altivec_yuv2_argb;
case AV_PIX_FMT_ABGR:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space ABGR\n");
return altivec_yuv2_abgr;
case AV_PIX_FMT_RGBA:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space RGBA\n");
return altivec_yuv2_rgba;
case AV_PIX_FMT_BGRA:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space BGRA\n");
return altivec_yuv2_bgra;
default: return NULL;
}
break;
case AV_PIX_FMT_UYVY422:
switch (c->dstFormat) {
case AV_PIX_FMT_BGR32:
av_log(c, AV_LOG_WARNING, "ALTIVEC: Color Space UYVY -> RGB32\n");
return altivec_uyvy_rgb32;
default: return NULL;
}
break;
}
#endif /* HAVE_ALTIVEC */
return NULL;
}
av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c,
const int inv_table[4],
int brightness,
int contrast,
int saturation)
{
#if HAVE_ALTIVEC
union {
DECLARE_ALIGNED(16, signed short, tmp)[8];
vector signed short vec;
} buf;
if (!(av_get_cpu_flags() & AV_CPU_FLAG_ALTIVEC))
return;
buf.tmp[0] = ((0xffffLL) * contrast >> 8) >> 9; // cy
buf.tmp[1] = -256 * brightness; // oy
buf.tmp[2] = (inv_table[0] >> 3) * (contrast >> 16) * (saturation >> 16); // crv
buf.tmp[3] = (inv_table[1] >> 3) * (contrast >> 16) * (saturation >> 16); // cbu
buf.tmp[4] = -((inv_table[2] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgu
buf.tmp[5] = -((inv_table[3] >> 1) * (contrast >> 16) * (saturation >> 16)); // cgv
c->CSHIFT = (vector unsigned short) vec_splat_u16(2);
c->CY = vec_splat((vector signed short) buf.vec, 0);
c->OY = vec_splat((vector signed short) buf.vec, 1);
c->CRV = vec_splat((vector signed short) buf.vec, 2);
c->CBU = vec_splat((vector signed short) buf.vec, 3);
c->CGU = vec_splat((vector signed short) buf.vec, 4);
c->CGV = vec_splat((vector signed short) buf.vec, 5);
return;
#endif /* HAVE_ALTIVEC */
}
#if HAVE_ALTIVEC
static av_always_inline void yuv2packedX_altivec(SwsContext *c,
const int16_t *lumFilter,
const int16_t **lumSrc,
int lumFilterSize,
const int16_t *chrFilter,
const int16_t **chrUSrc,
const int16_t **chrVSrc,
int chrFilterSize,
const int16_t **alpSrc,
uint8_t *dest,
int dstW, int dstY,
enum AVPixelFormat target)
{
int i, j;
vector signed short X, X0, X1, Y0, U0, V0, Y1, U1, V1, U, V;
vector signed short R0, G0, B0, R1, G1, B1;
vector unsigned char R, G, B;
vector unsigned char *out, *nout;
vector signed short RND = vec_splat_s16(1 << 3);
vector unsigned short SCL = vec_splat_u16(4);
DECLARE_ALIGNED(16, unsigned int, scratch)[16];
vector signed short *YCoeffs, *CCoeffs;
YCoeffs = c->vYCoeffsBank + dstY * lumFilterSize;
CCoeffs = c->vCCoeffsBank + dstY * chrFilterSize;
out = (vector unsigned char *) dest;
for (i = 0; i < dstW; i += 16) {
Y0 = RND;
Y1 = RND;
/* extract 16 coeffs from lumSrc */
for (j = 0; j < lumFilterSize; j++) {
X0 = vec_ld(0, &lumSrc[j][i]);
X1 = vec_ld(16, &lumSrc[j][i]);
Y0 = vec_mradds(X0, YCoeffs[j], Y0);
Y1 = vec_mradds(X1, YCoeffs[j], Y1);
}
U = RND;
V = RND;
/* extract 8 coeffs from U,V */
for (j = 0; j < chrFilterSize; j++) {
X = vec_ld(0, &chrUSrc[j][i / 2]);
U = vec_mradds(X, CCoeffs[j], U);
X = vec_ld(0, &chrVSrc[j][i / 2]);
V = vec_mradds(X, CCoeffs[j], V);
}
/* scale and clip signals */
Y0 = vec_sra(Y0, SCL);
Y1 = vec_sra(Y1, SCL);
U = vec_sra(U, SCL);
V = vec_sra(V, SCL);
Y0 = vec_clip_s16(Y0);
Y1 = vec_clip_s16(Y1);
U = vec_clip_s16(U);
V = vec_clip_s16(V);
/* now we have
* Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
* U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
*
* Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
* U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
* V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
*/
U0 = vec_mergeh(U, U);
V0 = vec_mergeh(V, V);
U1 = vec_mergel(U, U);
V1 = vec_mergel(V, V);
cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
R = vec_packclp(R0, R1);
G = vec_packclp(G0, G1);
B = vec_packclp(B0, B1);
switch (target) {
case AV_PIX_FMT_ABGR:
out_abgr(R, G, B, out);
break;
case AV_PIX_FMT_BGRA:
out_bgra(R, G, B, out);
break;
case AV_PIX_FMT_RGBA:
out_rgba(R, G, B, out);
break;
case AV_PIX_FMT_ARGB:
out_argb(R, G, B, out);
break;
case AV_PIX_FMT_RGB24:
out_rgb24(R, G, B, out);
break;
case AV_PIX_FMT_BGR24:
out_bgr24(R, G, B, out);
break;
default:
{
/* If this is reached, the caller should have called yuv2packedXinC
* instead. */
static int printed_error_message;
if (!printed_error_message) {
av_log(c, AV_LOG_ERROR,
"altivec_yuv2packedX doesn't support %s output\n",
av_get_pix_fmt_name(c->dstFormat));
printed_error_message = 1;
}
return;
}
}
}
if (i < dstW) {
i -= 16;
Y0 = RND;
Y1 = RND;
/* extract 16 coeffs from lumSrc */
for (j = 0; j < lumFilterSize; j++) {
X0 = vec_ld(0, &lumSrc[j][i]);
X1 = vec_ld(16, &lumSrc[j][i]);
Y0 = vec_mradds(X0, YCoeffs[j], Y0);
Y1 = vec_mradds(X1, YCoeffs[j], Y1);
}
U = RND;
V = RND;
/* extract 8 coeffs from U,V */
for (j = 0; j < chrFilterSize; j++) {
X = vec_ld(0, &chrUSrc[j][i / 2]);
U = vec_mradds(X, CCoeffs[j], U);
X = vec_ld(0, &chrVSrc[j][i / 2]);
V = vec_mradds(X, CCoeffs[j], V);
}
/* scale and clip signals */
Y0 = vec_sra(Y0, SCL);
Y1 = vec_sra(Y1, SCL);
U = vec_sra(U, SCL);
V = vec_sra(V, SCL);
Y0 = vec_clip_s16(Y0);
Y1 = vec_clip_s16(Y1);
U = vec_clip_s16(U);
V = vec_clip_s16(V);
/* now we have
* Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
* U = u0 u1 u2 u3 u4 u5 u6 u7 V = v0 v1 v2 v3 v4 v5 v6 v7
*
* Y0 = y0 y1 y2 y3 y4 y5 y6 y7 Y1 = y8 y9 y10 y11 y12 y13 y14 y15
* U0 = u0 u0 u1 u1 u2 u2 u3 u3 U1 = u4 u4 u5 u5 u6 u6 u7 u7
* V0 = v0 v0 v1 v1 v2 v2 v3 v3 V1 = v4 v4 v5 v5 v6 v6 v7 v7
*/
U0 = vec_mergeh(U, U);
V0 = vec_mergeh(V, V);
U1 = vec_mergel(U, U);
V1 = vec_mergel(V, V);
cvtyuvtoRGB(c, Y0, U0, V0, &R0, &G0, &B0);
cvtyuvtoRGB(c, Y1, U1, V1, &R1, &G1, &B1);
R = vec_packclp(R0, R1);
G = vec_packclp(G0, G1);
B = vec_packclp(B0, B1);
nout = (vector unsigned char *) scratch;
switch (target) {
case AV_PIX_FMT_ABGR:
out_abgr(R, G, B, nout);
break;
case AV_PIX_FMT_BGRA:
out_bgra(R, G, B, nout);
break;
case AV_PIX_FMT_RGBA:
out_rgba(R, G, B, nout);
break;
case AV_PIX_FMT_ARGB:
out_argb(R, G, B, nout);
break;
case AV_PIX_FMT_RGB24:
out_rgb24(R, G, B, nout);
break;
case AV_PIX_FMT_BGR24:
out_bgr24(R, G, B, nout);
break;
default:
/* Unreachable, I think. */
av_log(c, AV_LOG_ERROR,
"altivec_yuv2packedX doesn't support %s output\n",
av_get_pix_fmt_name(c->dstFormat));
return;
}
memcpy(&((uint32_t *) dest)[i], scratch, (dstW - i) / 4);
}
}
#define YUV2PACKEDX_WRAPPER(suffix, pixfmt) \
void ff_yuv2 ## suffix ## _X_altivec(SwsContext *c, \
const int16_t *lumFilter, \
const int16_t **lumSrc, \
int lumFilterSize, \
const int16_t *chrFilter, \
const int16_t **chrUSrc, \
const int16_t **chrVSrc, \
int chrFilterSize, \
const int16_t **alpSrc, \
uint8_t *dest, int dstW, int dstY) \
{ \
yuv2packedX_altivec(c, lumFilter, lumSrc, lumFilterSize, \
chrFilter, chrUSrc, chrVSrc, \
chrFilterSize, alpSrc, \
dest, dstW, dstY, pixfmt); \
}
YUV2PACKEDX_WRAPPER(abgr, AV_PIX_FMT_ABGR);
YUV2PACKEDX_WRAPPER(bgra, AV_PIX_FMT_BGRA);
YUV2PACKEDX_WRAPPER(argb, AV_PIX_FMT_ARGB);
YUV2PACKEDX_WRAPPER(rgba, AV_PIX_FMT_RGBA);
YUV2PACKEDX_WRAPPER(rgb24, AV_PIX_FMT_RGB24);
YUV2PACKEDX_WRAPPER(bgr24, AV_PIX_FMT_BGR24);
#endif /* HAVE_ALTIVEC */