libwebp: update to 0.4.3

This commit imports libwebp 0.4.3, including AUTHORS, COPYING, ChangeLog,
NEWS, PATENTS, README and src directories. In src, only includes header
and source files.

The patches required to build it in Qt will follow in separate
commit(s).

Change-Id: I23ebfd69e47a468c91a9e9b109e9cb8ac63705d4
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: aavit <eirik.aavitsland@theqtcompany.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/src/3rdparty/libwebp/src/enc/cost.h b/src/3rdparty/libwebp/src/enc/cost.h
index 3cbad1a..4e55895 100644
--- a/src/3rdparty/libwebp/src/enc/cost.h
+++ b/src/3rdparty/libwebp/src/enc/cost.h
@@ -14,12 +14,38 @@
 #ifndef WEBP_ENC_COST_H_
 #define WEBP_ENC_COST_H_
 
+#include <assert.h>
+#include <stdlib.h>
 #include "./vp8enci.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+// On-the-fly info about the current set of residuals. Handy to avoid
+// passing zillions of params.
+typedef struct {
+  int first;
+  int last;
+  const int16_t* coeffs;
+
+  int coeff_type;
+  ProbaArray* prob;
+  StatsArray* stats;
+  CostArray*  cost;
+} VP8Residual;
+
+void VP8InitResidual(int first, int coeff_type,
+                     VP8Encoder* const enc, VP8Residual* const res);
+
+typedef void (*VP8SetResidualCoeffsFunc)(const int16_t* const coeffs,
+                                         VP8Residual* const res);
+extern VP8SetResidualCoeffsFunc VP8SetResidualCoeffs;
+
+void VP8SetResidualCoeffsInit(void);  // must be called first
+
+int VP8RecordCoeffs(int ctx, const VP8Residual* const res);
+
 // approximate cost per level:
 extern const uint16_t VP8LevelFixedCosts[MAX_LEVEL + 1];
 extern const uint16_t VP8EntropyCost[256];        // 8bit fixed-point log(p)
@@ -29,6 +55,12 @@ static WEBP_INLINE int VP8BitCost(int bit, uint8_t proba) {
   return !bit ? VP8EntropyCost[proba] : VP8EntropyCost[255 - proba];
 }
 
+// Cost calculation function.
+typedef int (*VP8GetResidualCostFunc)(int ctx0, const VP8Residual* const res);
+extern VP8GetResidualCostFunc VP8GetResidualCost;
+
+void VP8GetResidualCostInit(void);  // must be called first
+
 // Level cost calculations
 extern const uint16_t VP8LevelCodes[MAX_VARIABLE_LEVEL][2];
 void VP8CalculateLevelCosts(VP8Proba* const proba);