dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2025-07-13 14:34:33 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity

sse2 version of CollectHistogram()

Browse Source 
~3% faster encoding.

Patch by Christian Duvivier (cduvivier at google dot com)

Change-Id: I8c11d63d0cffb35e145fe0ea74cb66a53f4950d9
This commit is contained in:
Pascal Massimino
2011-04-28 17:00:22 -07:00
parent c1c728d617
commit d757523889
4 changed files with 127 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/enc/vp8enci.h
View File

@ -28,6 +28,9 @@ extern "C" {
#define ENC_MIN_VERSION 1
#define ENC_REV_VERSION 2
// size of histogram used by CollectHistogram.
#define MAX_COEFF_THRESH 64
// intra prediction modes
enum { B_DC_PRED = 0, // 4x4 modes
B_TM_PRED = 1,
@ -408,6 +411,11 @@ int VP8EncLoop(VP8Encoder* const enc);
int VP8StatLoop(VP8Encoder* const enc);
// in analysis.c
// Compute susceptibility based on DCT-coeff histograms:
// the higher, the "easier" the macroblock is to compress.
typedef int (*VP8CHisto)(const uint8_t* ref, const uint8_t* pred,
int start_block, int end_block);
extern VP8CHisto VP8CollectHistogram;
// Main analysis loop. Decides the segmentations and complexity.
// Assigns a first guess for Intra16 and uvmode_ prediction modes.
int VP8EncAnalyze(VP8Encoder* const enc);