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Added implementation for various lossless functions

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- VP8LEncAnalyze, EvalAndApplySubtractGreen, ApplyPredictFilter,
  ApplyCrossColorFilter
- Added palette handling and transform buffer management in VP8LEncodeImage()
- Add Transforms (subtract Green, Predict, cross_color) to dsp/lossless.c.

These are more-or-less copied from src/lossless code.

After this Change, will implement the EncodeImageInternal() method.

Change-Id: Idf71f803c24b3b5ae3b5079b15e019721784611d
This commit is contained in:
Vikas Arora
2012-04-10 07:00:36 +00:00
committed by James Zern
parent 32714ce3be
commit 648be3939f
6 changed files with 989 additions and 208 deletions
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4
src/enc/histogram.h
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@ -47,7 +47,7 @@ static WEBP_INLINE void VP8LHistogramClear(VP8LHistogram* const p) {
}
static WEBP_INLINE void VP8LHistogramInit(VP8LHistogram* const p,
int palette_code_bits) {
int palette_code_bits) {
p->palette_code_bits_ = palette_code_bits;
VP8LHistogramClear(p);
}
@ -118,8 +118,6 @@ static WEBP_INLINE int VP8LHistogramNumCodes(const VP8LHistogram* const p) {
void VP8LConvertPopulationCountTableToBitEstimates(
int n, const int* const population_counts, double* const output);
double VP8LShannonEntropy(const int* const array, int n);
// Build a 2d image of histograms, subresolutioned by (1 << histobits) to
// the original image.
int VP8LHistogramBuildImage(int xsize, int ysize,