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change to properly account for coef scaling in unit tests

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The transform functions in experimental branch absorbed a scaling
factor of 4 to allow quantization steps closer to unit quantizer.
This commit added scaling code in between forward and inverse
transform to properly account for the scaling factor.

Change-Id: I9a573ddc1ffa74973b34800a5da1a56dbabe0949
This commit is contained in:
Yaowu Xu 2012-08-24 09:59:49 -07:00
parent 0b184efbbf
commit 95ee7f1131
2 changed files with 24 additions and 1 deletions
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14
test/fdct4x4_test.cc
View File

@ -107,6 +107,19 @@ TEST(Vp8FdctTest, RoundTripErrorCheck) {
// to test optimized versions of this function.
const int pitch = 8;
vp8_short_fdct4x4_c(test_input_block, test_temp_block, pitch);
for (int j = 0; j < 16; ++j) {
if(test_temp_block[j] > 0) {
test_temp_block[j] += 2;
test_temp_block[j] /= 4;
test_temp_block[j] *= 4;
} else {
test_temp_block[j] -= 2;
test_temp_block[j] /= 4;
test_temp_block[j] *= 4;
}
}
// Because the bitstream is not frozen yet, use the idct in the codebase.
vp8_short_idct4x4llm_c(test_temp_block, test_output_block, pitch);
@ -118,7 +131,6 @@ TEST(Vp8FdctTest, RoundTripErrorCheck) {
total_error += error;
}
}
EXPECT_GE(1, max_error)
<< "Error: FDCT/IDCT has an individual roundtrip error > 1";

11
test/fdct8x8_test.cc
View File

@ -101,6 +101,17 @@ TEST(VP8Fdct8x8Test, RoundTripErrorCheck) {
const int pitch = 16;
vp8_short_fdct8x8_c(test_input_block, test_temp_block, pitch);
for (int j = 0; j < 64; ++j){
if(test_temp_block[j] > 0) {
test_temp_block[j] += 2;
test_temp_block[j] /= 4;
test_temp_block[j] *= 4;
} else {
test_temp_block[j] -= 2;
test_temp_block[j] /= 4;
test_temp_block[j] *= 4;
}
}
vp8_short_idct8x8_c(test_temp_block, test_output_block, pitch);
for (int j = 0; j < 64; ++j) {