Merged android-experimental branch back to trunk.

2011-04-06 14:31:03 +00:00
parent bbdd0aecbd
commit 68534d70f3
120 changed files with 3483 additions and 1620 deletions
--- a/android/android-opencv/jni/yuv420sp2rgb.c
+++ b/android/android-opencv/jni/yuv420sp2rgb.c
@@ -0,0 +1,156 @@
+#include <string.h>
+#include <jni.h>
+
+#include <yuv420sp2rgb.h>
+#include <yuv2rgb.h>
+
+/*
+ YUV 4:2:0 image with a plane of 8 bit Y samples followed by an interleaved
+ U/V plane containing 8 bit 2x2 subsampled chroma samples.
+ except the interleave order of U and V is reversed.
+
+ H V
+ Y Sample Period      1 1
+ U (Cb) Sample Period 2 2
+ V (Cr) Sample Period 2 2
+ */
+
+/*
+ size of a char:
+ find . -name limits.h -exec grep CHAR_BIT {} \;
+ */
+
+#ifndef max
+#define max(a,b) (a > b ? a : b )
+#define min(a,b) (a < b ? a : b )
+#endif
+enum
+{
+    FLAGS         = 0x40080100
+};
+
+#define READUV(U,V) (tables[256 + (U)] + tables[512 + (V)])
+#define READY(Y)    tables[Y]
+#define FIXUP(Y)                 \
+do {                             \
+    int tmp = (Y) & FLAGS;       \
+    if (tmp != 0)                \
+    {                            \
+        tmp  -= tmp>>8;          \
+        (Y)  |= tmp;             \
+        tmp   = FLAGS & ~(Y>>1); \
+        (Y)  += tmp>>8;          \
+    }                            \
+} while (0 == 1)
+
+#define STORE(Y,DSTPTR)           \
+do {                              \
+    uint32_t Y2       = (Y);      \
+    uint8_t  *DSTPTR2 = (DSTPTR); \
+    (DSTPTR2)[2] = (Y2);          \
+    (DSTPTR2)[1] = (Y2)>>22;      \
+    (DSTPTR2)[0] = (Y2)>>11;      \
+} while (0 == 1)
+
+typedef unsigned char byte;
+const int bytes_per_pixel = 2;
+void color_convert_common(const unsigned char *pY, const unsigned char *pUV, int width, int height,
+                          unsigned char *buffer, int grey)
+{
+#define LOOKUP 1
+#if ! LOOKUP
+  int nR, nG, nB;
+#endif
+  int dest_span = 3 * width;
+  unsigned char *out = buffer;
+  if (grey)
+  {
+    memcpy(out, pY, width * height * sizeof(unsigned char));
+  }
+  else
+  {
+
+#if LOOKUP
+    const uint32_t* tables = yuv2rgb565_table;
+    const byte* nY = pY;
+    const byte* nUV = pUV;
+    int idx = 0;
+    while (nY+width < pUV)
+    {
+      int y = (idx / width);
+      int x = (idx % width);
+      byte Y = *nY;
+      byte Y2 = nY[width];
+      byte V = *nUV;
+      byte U = *(nUV + 1);
+      /* Do 2 row pairs */
+      uint32_t uv, y0, y1;
+
+      uv = READUV(U,V);
+      y1 = uv + READY(Y);
+      y0 = uv + READY(Y2);
+      FIXUP(y1);
+      FIXUP(y0);
+      STORE(y1, &out[dest_span]);
+      STORE(y0, out);
+      out += 3;
+      Y = *(++nY);
+      Y2 = nY[width];
+      y1 = uv + READY(Y);
+      y0 = uv + READY(Y2);
+      FIXUP(y1);
+      FIXUP(y0);
+      STORE(y1, &out[dest_span]);
+      STORE(y0, out);
+      out += 3;
+      height += (2 << 16);
+      ++nY;
+      nUV = pUV + (y / 2) * width + 2 * (x / 2);
+      idx+=2;
+    }
+#else
+    const byte* nY = pY;
+    const byte* nUV = pUV;
+    int idx = 0;
+    while (nY < pUV)
+    {
+
+      int y = (idx / width);
+      int x = (idx % width);
+      int Y = *nY;
+      int V = *nUV;
+      int U = *(nUV + 1);
+
+      Y -= 16;
+      V -= 128;
+      U -= 128;
+      if (y < 0)
+      y = 0;
+
+      nB = (int)(1192 * Y + 2066 * U);
+      nG = (int)(1192 * Y - 833 * V - 400 * U);
+      nR = (int)(1192 * Y + 1634 * V);
+
+      nR = min(262143, max(0, nR));
+      nG = min(262143, max(0, nG));
+      nB = min(262143, max(0, nB));
+
+      nR >>= 10;
+      nR &= 0xff;
+      nG >>= 10;
+      nG &= 0xff;
+      nB >>= 10;
+      nB &= 0xff;
+
+      *(out++) = (unsigned char)nR;
+      *(out++) = (unsigned char)nG;
+      *(out++) = (unsigned char)nB;
+      nY += 1;
+      nUV = pUV + (y / 2) * width + 2 * (x / 2);
+      ++idx;
+    }
+#endif
+  }
+
+
+}