libwebp: update to 0.5.0

This commit imports libwebp 0.5.0, 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: I96b4961ba63c75cc7fbab158c36a0f403f254c14
Reviewed-by: aavit <eirik.aavitsland@theqtcompany.com>

1 files changed, 7 insertions, 22 deletions

diff --git a/src/3rdparty/libwebp/src/enc/cost.h b/src/3rdparty/libwebp/src/enc/cost.h
index 4e55895..20960d6 100644
--- a/src/3rdparty/libwebp/src/enc/cost.h
+++ b/src/3rdparty/libwebp/src/enc/cost.h
@@ -24,46 +24,31 @@ extern "C" {
 
 // On-the-fly info about the current set of residuals. Handy to avoid
 // passing zillions of params.
-typedef struct {
+typedef struct VP8Residual VP8Residual;
+struct VP8Residual {
   int first;
   int last;
   const int16_t* coeffs;
 
   int coeff_type;
-  ProbaArray* prob;
-  StatsArray* stats;
-  CostArray*  cost;
-} VP8Residual;
+  ProbaArray*   prob;
+  StatsArray*   stats;
+  CostArrayPtr  costs;
+};
 
 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)
-
 // Cost of coding one event with probability 'proba'.
 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);
+void VP8CalculateLevelCosts(VP8EncProba* const proba);
 static WEBP_INLINE int VP8LevelCost(const uint16_t* const table, int level) {
   return VP8LevelFixedCosts[level]
        + table[(level > MAX_VARIABLE_LEVEL) ? MAX_VARIABLE_LEVEL : level];