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add stats for lossless

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* Extend AuxStats with new fields
  it's slightly ABI-incompatible, but i guess it's ok for 0.1.99+
  I expect to add more stats later, possibly (predictor stats, etc.)
* Have cwebp report the features used by lossless
  compression (either for alpha or full lossless coding)
* Print the PSNR for alpha (useful in case of -alpha_q)
* clean-up alpha.c signatures
+ misc cleanup (added const '* const ptr', etc.)

Change-Id: I157a21581f1793cb0c6cc0882e7b0a2dde68a970
This commit is contained in:
Pascal Massimino
2012-07-24 16:15:36 -07:00
parent d39177b74c
commit 7d853d79dc
7 changed files with 143 additions and 75 deletions
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src/enc/webpenc.c
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@ -284,6 +284,7 @@ static void FinalizePSNR(const VP8Encoder* const enc) {
stats->PSNR[1] = (float)GetPSNR(sse[1], size / 4);
stats->PSNR[2] = (float)GetPSNR(sse[2], size / 4);
stats->PSNR[3] = (float)GetPSNR(sse[0] + sse[1] + sse[2], size * 3 / 2);
stats->PSNR[4] = (float)GetPSNR(sse[3], size);
}
static void StoreStats(VP8Encoder* const enc) {