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video-scaler: Small performance tweaks

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Small performance tweaks for RGB and friends.
Add, but ifdef out, alternative nearest neighbour scaling, it is slower
than the current table based version.
Use memcpy instead of orc_memcpy because it is measurably faster.
Fix YUY2 and friends vertical scaling.
This commit is contained in:
Wim Taymans 2015-02-10 16:40:21 +01:00
parent 13643870bf
commit 4313970678
1 changed files with 64 additions and 19 deletions
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83
gst-libs/gst/video/video-scaler.c
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@ -214,6 +214,7 @@ gst_video_scaler_new (GstVideoResamplerMethod method, GstVideoScalerFlags flags,
scale->inc = ((in_size - 1) << 16) / (out_size - 1) - 1;
scaler_dump (scale);
GST_DEBUG ("max_taps %d", scale->resampler.max_taps);
return scale;
}
@ -388,20 +389,34 @@ make_s16_taps (GstVideoScaler * scale, gint n_elems, gint precision)
}
}
#undef ACC_SCALE
static void
video_scale_h_near_u8 (GstVideoScaler * scale,
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
{
guint8 *s, *d;
guint32 *offset;
gint i;
d = (guint8 *) dest + dest_offset;
s = (guint8 *) src;
offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++)
d[i] = s[offset[i]];
{
#ifndef ACC_SCALE
guint32 *offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++)
d[i] = s[offset[i]];
#else
gint acc = 0;
for (i = 0; i < width; i++) {
gint j = (acc + 0x8000) >> 16;
d[i] = s[j];
acc += scale->inc;
}
#endif
}
}
static void
@ -409,17 +424,34 @@ video_scale_h_near_3u8 (GstVideoScaler * scale,
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
{
guint8 *s, *d;
guint32 *offset;
gint i;
d = (guint8 *) dest + dest_offset;
s = (guint8 *) src;
offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++) {
d[i * 3 + 0] = s[offset[i] * 3 + 0];
d[i * 3 + 1] = s[offset[i] * 3 + 1];
d[i * 3 + 2] = s[offset[i] * 3 + 2];
{
#ifndef ACC_SCALE
guint32 *offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++) {
gint j = offset[i] * 3;
d[i * 3 + 0] = s[j + 0];
d[i * 3 + 1] = s[j + 1];
d[i * 3 + 2] = s[j + 2];
}
#else
gint acc = 0;
for (i = 0; i < width; i++) {
gint j = ((acc + 0x8000) >> 16) * 3;
d[i * 3 + 0] = s[j + 0];
d[i * 3 + 1] = s[j + 1];
d[i * 3 + 2] = s[j + 2];
acc += scale->inc;
}
#endif
}
}
@ -434,7 +466,7 @@ video_scale_h_near_u16 (GstVideoScaler * scale,
s = (guint16 *) src;
{
#if 1
#ifndef ACC_SCALE
guint32 *offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++)
@ -455,11 +487,10 @@ static void
video_scale_h_near_u32 (GstVideoScaler * scale,
gpointer src, gpointer dest, guint dest_offset, guint width, guint n_elems)
{
guint32 *s, *d, *offset;
guint32 *s, *d;
d = (guint32 *) dest + dest_offset;
s = (guint32 *) src;
offset = scale->resampler.offset + dest_offset;
#if 0
/* ORC is slower on this */
@ -469,8 +500,20 @@ video_scale_h_near_u32 (GstVideoScaler * scale,
#else
{
gint i;
#ifndef ACC_SCALE
guint32 *offset = scale->resampler.offset + dest_offset;
for (i = 0; i < width; i++)
d[i] = s[offset[i]];
#else
gint acc = 0;
for (i = 0; i < width; i++) {
gint j = (acc + 0x8000) >> 16;
d[i] = s[j];
acc += scale->inc;
}
#endif
}
#endif
}
@ -567,9 +610,10 @@ video_scale_h_ntap_u8 (GstVideoScaler * scale,
guint8 *s = (guint8 *) src;
for (i = 0; i < count; i++) {
pixels[i * 3 + 0] = s[offset_n[i] * 3 + 0];
pixels[i * 3 + 1] = s[offset_n[i] * 3 + 1];
pixels[i * 3 + 2] = s[offset_n[i] * 3 + 2];
gint j = offset_n[i] * 3;
pixels[i * 3 + 0] = s[j + 0];
pixels[i * 3 + 1] = s[j + 1];
pixels[i * 3 + 2] = s[j + 2];
}
d = (guint8 *) dest + dest_offset * 3;
break;
@ -735,7 +779,7 @@ video_scale_v_near_u8 (GstVideoScaler * scale,
guint n_elems)
{
if (dest != srcs[0])
orc_memcpy (dest, srcs[0], n_elems * width);
memcpy (dest, srcs[0], n_elems * width);
}
static void
@ -744,7 +788,7 @@ video_scale_v_near_u16 (GstVideoScaler * scale,
guint n_elems)
{
if (dest != srcs[0])
orc_memcpy (dest, srcs[0], n_elems * 2 * width);
memcpy (dest, srcs[0], n_elems * 2 * width);
}
static void
@ -1273,7 +1317,8 @@ gst_video_scaler_vertical (GstVideoScaler * scale, GstVideoFormat format,
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_UYVY:
bits = 8;
n_elems = 2;
n_elems = 1;
width *= 2;
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR: