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, 53 insertions, 44 deletions

diff --git a/src/3rdparty/libwebp/src/dsp/dec_mips32.c b/src/3rdparty/libwebp/src/dsp/dec_mips32.c
index 3e89ed3..4e9ef42 100644
--- a/src/3rdparty/libwebp/src/dsp/dec_mips32.c
+++ b/src/3rdparty/libwebp/src/dsp/dec_mips32.c
@@ -16,6 +16,8 @@
 
 #if defined(WEBP_USE_MIPS32)
 
+#include "./mips_macro.h"
+
 static const int kC1 = 20091 + (1 << 16);
 static const int kC2 = 35468;
 
@@ -52,6 +54,7 @@ static WEBP_INLINE void do_filter6(uint8_t* p, int step) {
   const int p2 = p[-3 * step], p1 = p[-2 * step], p0 = p[-step];
   const int q0 = p[0], q1 = p[step], q2 = p[2 * step];
   const int a = VP8ksclip1[3 * (q0 - p0) + VP8ksclip1[p1 - q1]];
+  // a is in [-128,127], a1 in [-27,27], a2 in [-18,18] and a3 in [-9,9]
   const int a1 = (27 * a + 63) >> 7;  // eq. to ((3 * a + 7) * 9) >> 7
   const int a2 = (18 * a + 63) >> 7;  // eq. to ((2 * a + 7) * 9) >> 7
   const int a3 = (9  * a + 63) >> 7;  // eq. to ((1 * a + 7) * 9) >> 7
@@ -68,9 +71,9 @@ static WEBP_INLINE int hev(const uint8_t* p, int step, int thresh) {
   return (abs_mips32(p1 - p0) > thresh) || (abs_mips32(q1 - q0) > thresh);
 }
 
-static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int thresh) {
+static WEBP_INLINE int needs_filter(const uint8_t* p, int step, int t) {
   const int p1 = p[-2 * step], p0 = p[-step], q0 = p[0], q1 = p[step];
-  return ((2 * abs_mips32(p0 - q0) + (abs_mips32(p1 - q1) >> 1)) <= thresh);
+  return ((4 * abs_mips32(p0 - q0) + abs_mips32(p1 - q1)) <= t);
 }
 
 static WEBP_INLINE int needs_filter2(const uint8_t* p,
@@ -78,7 +81,7 @@ static WEBP_INLINE int needs_filter2(const uint8_t* p,
   const int p3 = p[-4 * step], p2 = p[-3 * step];
   const int p1 = p[-2 * step], p0 = p[-step];
   const int q0 = p[0], q1 = p[step], q2 = p[2 * step], q3 = p[3 * step];
-  if ((2 * abs_mips32(p0 - q0) + (abs_mips32(p1 - q1) >> 1)) > t) {
+  if ((4 * abs_mips32(p0 - q0) + abs_mips32(p1 - q1)) > t) {
     return 0;
   }
   return abs_mips32(p3 - p2) <= it && abs_mips32(p2 - p1) <= it &&
@@ -89,8 +92,9 @@ static WEBP_INLINE int needs_filter2(const uint8_t* p,
 static WEBP_INLINE void FilterLoop26(uint8_t* p,
                                      int hstride, int vstride, int size,
                                      int thresh, int ithresh, int hev_thresh) {
+  const int thresh2 = 2 * thresh + 1;
   while (size-- > 0) {
-    if (needs_filter2(p, hstride, thresh, ithresh)) {
+    if (needs_filter2(p, hstride, thresh2, ithresh)) {
       if (hev(p, hstride, hev_thresh)) {
         do_filter2(p, hstride);
       } else {
@@ -104,8 +108,9 @@ static WEBP_INLINE void FilterLoop26(uint8_t* p,
 static WEBP_INLINE void FilterLoop24(uint8_t* p,
                                      int hstride, int vstride, int size,
                                      int thresh, int ithresh, int hev_thresh) {
+  const int thresh2 = 2 * thresh + 1;
   while (size-- > 0) {
-    if (needs_filter2(p, hstride, thresh, ithresh)) {
+    if (needs_filter2(p, hstride, thresh2, ithresh)) {
       if (hev(p, hstride, hev_thresh)) {
         do_filter2(p, hstride);
       } else {
@@ -176,8 +181,9 @@ static void HFilter16i(uint8_t* p, int stride,
 
 static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
   int i;
+  const int thresh2 = 2 * thresh + 1;
   for (i = 0; i < 16; ++i) {
-    if (needs_filter(p + i, stride, thresh)) {
+    if (needs_filter(p + i, stride, thresh2)) {
       do_filter2(p + i, stride);
     }
   }
@@ -185,8 +191,9 @@ static void SimpleVFilter16(uint8_t* p, int stride, int thresh) {
 
 static void SimpleHFilter16(uint8_t* p, int stride, int thresh) {
   int i;
+  const int thresh2 = 2 * thresh + 1;
   for (i = 0; i < 16; ++i) {
-    if (needs_filter(p + i * stride, 1, thresh)) {
+    if (needs_filter(p + i * stride, 1, thresh2)) {
       do_filter2(p + i * stride, 1);
     }
   }
@@ -384,7 +391,7 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "sra      %[temp7],  %[temp7],  3                  \n\t"
     "sra      %[temp4],  %[temp4],  3                  \n\t"
     "addiu    %[temp6],  $zero,     255                \n\t"
-    "lbu      %[temp1],  0(%[dst])                     \n\t"
+    "lbu      %[temp1],  0+0*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp1],  %[temp1],  %[temp5]           \n\t"
     "sra      %[temp5],  %[temp1],  8                  \n\t"
     "sra      %[temp18], %[temp1],  31                 \n\t"
@@ -392,8 +399,8 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp1],  %[temp1],  %[temp1]           \n\t"
     "movz     %[temp1],  %[temp6],  %[temp18]          \n\t"
   "1:                                                  \n\t"
-    "lbu      %[temp18], 1(%[dst])                     \n\t"
-    "sb       %[temp1],  0(%[dst])                     \n\t"
+    "lbu      %[temp18], 1+0*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp1],  0+0*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp18], %[temp18], %[temp11]          \n\t"
     "sra      %[temp11], %[temp18], 8                  \n\t"
     "sra      %[temp1],  %[temp18], 31                 \n\t"
@@ -401,8 +408,8 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp18], %[temp18], %[temp18]          \n\t"
     "movz     %[temp18], %[temp6],  %[temp1]           \n\t"
   "2:                                                  \n\t"
-    "lbu      %[temp1],  2(%[dst])                     \n\t"
-    "sb       %[temp18], 1(%[dst])                     \n\t"
+    "lbu      %[temp1],  2+0*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp18], 1+0*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp1],  %[temp1],  %[temp8]           \n\t"
     "sra      %[temp8],  %[temp1],  8                  \n\t"
     "sra      %[temp18], %[temp1],  31                 \n\t"
@@ -410,8 +417,8 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp1],  %[temp1],  %[temp1]           \n\t"
     "movz     %[temp1],  %[temp6],  %[temp18]          \n\t"
   "3:                                                  \n\t"
-    "lbu      %[temp18], 3(%[dst])                     \n\t"
-    "sb       %[temp1],  2(%[dst])                     \n\t"
+    "lbu      %[temp18], 3+0*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp1],  2+0*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp18], %[temp18], %[temp16]          \n\t"
     "sra      %[temp16], %[temp18], 8                  \n\t"
     "sra      %[temp1],  %[temp18], 31                 \n\t"
@@ -419,11 +426,11 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp18], %[temp18], %[temp18]          \n\t"
     "movz     %[temp18], %[temp6],  %[temp1]           \n\t"
   "4:                                                  \n\t"
-    "sb       %[temp18], 3(%[dst])                     \n\t"
-    "lbu      %[temp5],  32(%[dst])                    \n\t"
-    "lbu      %[temp8],  33(%[dst])                    \n\t"
-    "lbu      %[temp11], 34(%[dst])                    \n\t"
-    "lbu      %[temp16], 35(%[dst])                    \n\t"
+    "sb       %[temp18], 3+0*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp5],  0+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp8],  1+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp11], 2+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp16], 3+1*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp5],  %[temp5],  %[temp17]          \n\t"
     "addu     %[temp8],  %[temp8],  %[temp15]          \n\t"
     "addu     %[temp11], %[temp11], %[temp12]          \n\t"
@@ -452,14 +459,14 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp16], %[temp16], %[temp16]          \n\t"
     "movz     %[temp16], %[temp6],  %[temp15]          \n\t"
   "8:                                                  \n\t"
-    "sb       %[temp5],  32(%[dst])                    \n\t"
-    "sb       %[temp8],  33(%[dst])                    \n\t"
-    "sb       %[temp11], 34(%[dst])                    \n\t"
-    "sb       %[temp16], 35(%[dst])                    \n\t"
-    "lbu      %[temp5],  64(%[dst])                    \n\t"
-    "lbu      %[temp8],  65(%[dst])                    \n\t"
-    "lbu      %[temp11], 66(%[dst])                    \n\t"
-    "lbu      %[temp16], 67(%[dst])                    \n\t"
+    "sb       %[temp5],  0+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp8],  1+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp11], 2+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp16], 3+1*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp5],  0+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp8],  1+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp11], 2+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp16], 3+2*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp5],  %[temp5],  %[temp9]           \n\t"
     "addu     %[temp8],  %[temp8],  %[temp3]           \n\t"
     "addu     %[temp11], %[temp11], %[temp0]           \n\t"
@@ -488,14 +495,14 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp16], %[temp16], %[temp16]          \n\t"
     "movz     %[temp16], %[temp6],  %[temp3]           \n\t"
   "12:                                                 \n\t"
-    "sb       %[temp5],  64(%[dst])                    \n\t"
-    "sb       %[temp8],  65(%[dst])                    \n\t"
-    "sb       %[temp11], 66(%[dst])                    \n\t"
-    "sb       %[temp16], 67(%[dst])                    \n\t"
-    "lbu      %[temp5],  96(%[dst])                    \n\t"
-    "lbu      %[temp8],  97(%[dst])                    \n\t"
-    "lbu      %[temp11], 98(%[dst])                    \n\t"
-    "lbu      %[temp16], 99(%[dst])                    \n\t"
+    "sb       %[temp5],  0+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp8],  1+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp11], 2+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp16], 3+2*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp5],  0+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp8],  1+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp11], 2+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "lbu      %[temp16], 3+3*" XSTR(BPS) "(%[dst])     \n\t"
     "addu     %[temp5],  %[temp5],  %[temp13]          \n\t"
     "addu     %[temp8],  %[temp8],  %[temp7]           \n\t"
     "addu     %[temp11], %[temp11], %[temp4]           \n\t"
@@ -524,10 +531,10 @@ static void TransformOne(const int16_t* in, uint8_t* dst) {
     "xor      %[temp16], %[temp16], %[temp16]          \n\t"
     "movz     %[temp16], %[temp6],  %[temp3]           \n\t"
   "16:                                                 \n\t"
-    "sb       %[temp5],  96(%[dst])                    \n\t"
-    "sb       %[temp8],  97(%[dst])                    \n\t"
-    "sb       %[temp11], 98(%[dst])                    \n\t"
-    "sb       %[temp16], 99(%[dst])                    \n\t"
+    "sb       %[temp5],  0+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp8],  1+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp11], 2+3*" XSTR(BPS) "(%[dst])     \n\t"
+    "sb       %[temp16], 3+3*" XSTR(BPS) "(%[dst])     \n\t"
 
     : [temp0]"=&r"(temp0), [temp1]"=&r"(temp1), [temp2]"=&r"(temp2),
       [temp3]"=&r"(temp3), [temp4]"=&r"(temp4), [temp5]"=&r"(temp5),
@@ -548,15 +555,12 @@ static void TransformTwo(const int16_t* in, uint8_t* dst, int do_two) {
   }
 }
 
-#endif  // WEBP_USE_MIPS32
-
 //------------------------------------------------------------------------------
 // Entry point
 
 extern void VP8DspInitMIPS32(void);
 
-void VP8DspInitMIPS32(void) {
-#if defined(WEBP_USE_MIPS32)
+WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitMIPS32(void) {
   VP8InitClipTables();
 
   VP8Transform = TransformTwo;
@@ -574,5 +578,10 @@ void VP8DspInitMIPS32(void) {
   VP8SimpleHFilter16 = SimpleHFilter16;
   VP8SimpleVFilter16i = SimpleVFilter16i;
   VP8SimpleHFilter16i = SimpleHFilter16i;
-#endif  // WEBP_USE_MIPS32
 }
+
+#else  // !WEBP_USE_MIPS32
+
+WEBP_DSP_INIT_STUB(VP8DspInitMIPS32)
+
+#endif  // WEBP_USE_MIPS32