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swscale/output: VSX-optimize nbps yuv2plane1

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./ffmpeg_g -f rawvideo -pix_fmt rgb24 -s hd1080 -i /dev/zero -pix_fmt yuv420p9le \
-f null -vframes 100 -v error -nostats -

Speedups:
yuv2plane1_9BE_vsx	11.2042
yuv2plane1_9LE_vsx	11.156
yuv2plane1_10BE_vsx	9.89428
yuv2plane1_10LE_vsx	10.3637
yuv2plane1_12BE_vsx	9.71923
yuv2plane1_12LE_vsx	11.0404
yuv2plane1_14BE_vsx	10.1763
yuv2plane1_14LE_vsx	11.2728

Fate passes, each format tested with an image to video conversion.

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Lauri Kasanen 2018-11-27 15:26:00 +02:00 • committed by Michael Niedermayer
parent 11817c3316
commit 1046cba24b
1 changed files with 83 additions and 0 deletions
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83
libswscale/ppc/swscale_vsx.c
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@ -131,6 +131,75 @@ static void yuv2plane1_8_vsx(const int16_t *src, uint8_t *dest, int dstW,
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);
}
#define yuv2NBPS(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); \
}
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)
#endif /* !HAVE_BIGENDIAN */
#endif /* HAVE_VSX */
av_cold void ff_sws_init_swscale_vsx(SwsContext *c)
@ -158,6 +227,20 @@ av_cold void ff_sws_init_swscale_vsx(SwsContext *c)
case 8:
c->yuv2plane1 = yuv2plane1_8_vsx;
break;
#if !HAVE_BIGENDIAN
case 9:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_9BE_vsx : yuv2plane1_9LE_vsx;
break;
case 10:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_10BE_vsx : yuv2plane1_10LE_vsx;
break;
case 12:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_12BE_vsx : yuv2plane1_12LE_vsx;
break;
case 14:
c->yuv2plane1 = isBE(dstFormat) ? yuv2plane1_14BE_vsx : yuv2plane1_14LE_vsx;
break;
#endif
}
}
#endif /* HAVE_VSX */