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Further resolution of QIndex LUTS;

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This commit resolves further QIndex look up tables to facilitate
experimentation with the quantizer range.

In some cases  rather than remove the look up tables completely
I have created functions that are called once  to populate them
using a formulaic approach base on the actual quantizer.

The use of these functions based on best fit of data from the original
tables does affect the results on some clips but across the derf test
set the effect was broadly neutral.

Change-Id: I8baa61c97ce87dc09a6340d56fdeb681b9345793
This commit is contained in:
Paul Wilkins
2011-11-23 11:32:20 +00:00
parent 08491b8665
commit a0b7db22e6
3 changed files with 92 additions and 176 deletions
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2
vp8/encoder/firstpass.c
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@@ -63,7 +63,7 @@ extern void vp8_alloc_compressor_data(VP8_COMP *cpi);
static int vscale_lookup[7] = {0, 1, 1, 2, 2, 3, 3};
static int hscale_lookup[7] = {0, 0, 1, 1, 2, 2, 3};
// TODO #if CONFIG_EXTEND_QRANGE
static const int cq_level[QINDEX_RANGE] =
{
0,0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,