ref: e326cecf18a01172074bf9b3a9524c5887a122e7
parent: ba8fc719792616e253ba2a1c62504a64bb5acb7a
author: Tero Rintaluoma <teror@google.com>
date: Thu Aug 22 07:29:19 EDT 2013
Fix intermediate height in convolve_c
- Intermediate height was not correct i.e. when block size is 4 and
y_step_q4 is 6. In this case intermediate height was
(4*6) >> 4 = 1 and vertical interpolation needs two source pixels
plus 7 extra pixels for taps.
- Also if the current output block is 16x16 and we are using 4x upscaling
we need only 12 rows after horizontal filtering instead of 16.
Patch Set 2: Intermediate_height updated after CL 66723
"Fix bug in convolution functions (filter selection)"
Change-Id: I5a1a1bc2ac9d5edb3a6e0818de618bf318fdd589
--- a/test/convolve_test.cc
+++ b/test/convolve_test.cc
@@ -8,6 +8,7 @@
* be found in the AUTHORS file in the root of the source tree.
*/
+#include <string.h>
#include "test/acm_random.h"
#include "test/register_state_check.h"
#include "test/util.h"
@@ -187,7 +188,7 @@
protected:
static const int kDataAlignment = 16;
- static const int kOuterBlockSize = 128;
+ static const int kOuterBlockSize = 256;
static const int kInputStride = kOuterBlockSize;
static const int kOutputStride = kOuterBlockSize;
static const int kMaxDimension = 64;
@@ -224,6 +225,10 @@
input_[i] = prng.Rand8Extremes();
}
+ void SetConstantInput(int value) {+ memset(input_, value, kInputBufferSize);
+ }
+
void CheckGuardBlocks() { for (int i = 0; i < kOutputBufferSize; ++i) {if (IsIndexInBorder(i))
@@ -539,6 +544,35 @@
ASSERT_EQ(in[ref_y * kInputStride + ref_x], out[y * kOutputStride + x])
<< "x == " << x << ", y == " << y;
+ }
+ }
+}
+
+/* This test exercises that enough rows and columns are filtered with every
+ possible initial fractional positions and scaling steps. */
+TEST_P(ConvolveTest, CheckScalingFiltering) {+ uint8_t* const in = input();
+ uint8_t* const out = output();
+
+ SetConstantInput(127);
+
+ for (int frac = 0; frac < 16; ++frac) {+ for (int step = 1; step <= 32; ++step) {+ /* Test the horizontal and vertical filters in combination. */
+ REGISTER_STATE_CHECK(UUT_->hv8_(in, kInputStride, out, kOutputStride,
+ vp9_sub_pel_filters_8[frac], step,
+ vp9_sub_pel_filters_8[frac], step,
+ Width(), Height()));
+
+ CheckGuardBlocks();
+
+ for (int y = 0; y < Height(); ++y) {+ for (int x = 0; x < Width(); ++x) {+ ASSERT_EQ(in[y * kInputStride + x], out[y * kOutputStride + x])
+ << "x == " << x << ", y == " << y
+ << ", frac == " << frac << ", step == " << step;
+ }
+ }
}
}
}
--- a/vp9/common/vp9_convolve.c
+++ b/vp9/common/vp9_convolve.c
@@ -195,7 +195,7 @@
* h == 64, taps == 8.
*/
uint8_t temp[64 * 135];
- int intermediate_height = MAX(((h * y_step_q4) >> 4), 1) + taps - 1;
+ int intermediate_height = (((h - 1) * y_step_q4 + 15) >> 4) + taps;
assert(w <= 64);
assert(h <= 64);
@@ -202,9 +202,6 @@
assert(taps <= 8);
assert(y_step_q4 <= 32);
assert(x_step_q4 <= 32);
-
- if (intermediate_height < h)
- intermediate_height = h;
convolve_horiz_c(src - src_stride * (taps / 2 - 1), src_stride, temp, 64,
filter_x, x_step_q4, filter_y, y_step_q4, w,
--
⑨