Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 298 insertions, 0 deletions

diff --git a/KaplaDemo/samples/sampleViewer3/IJGWin32/jcpred.cpp b/KaplaDemo/samples/sampleViewer3/IJGWin32/jcpred.cpp
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+/*
+ * jcpred.c
+ *
+ * Copyright (C) 1998, Thomas G. Lane.
+ * This file is part of the Independent JPEG Group's software.
+ * For conditions of distribution and use, see the accompanying README file.
+ *
+ * This file contains sample differencing for lossless JPEG.
+ *
+ * In order to avoid paying the performance penalty of having to check the
+ * predictor being used and the row being processed for each call of the
+ * undifferencer, and to promote optimization, we have separate differencing
+ * functions for each case.
+ *
+ * We are able to avoid duplicating source code by implementing the predictors
+ * and differencers as macros.  Each of the differencing functions are
+ * simply wrappers around a DIFFERENCE macro with the appropriate PREDICTOR
+ * macro passed as an argument.
+ */
+#include "stdafx.h"
+
+#define JPEG_INTERNALS
+//#include "jinclude.h"
+//#include "jpeglib.h"
+//#include "jlossls.h"		/* Private declarations for lossless codec */
+
+
+#ifdef C_LOSSLESS_SUPPORTED
+
+/* Private predictor object */
+
+typedef struct {
+  /* MCU-rows left in the restart interval for each component */
+  unsigned int restart_rows_to_go[MAX_COMPONENTS];
+} c_predictor;
+
+typedef c_predictor * c_pred_ptr;
+
+/* Forward declarations */
+LOCAL(void) reset_predictor
+	JPP((j_compress_ptr cinfo, int ci));
+METHODDEF(void) start_pass
+	JPP((j_compress_ptr cinfo));
+
+
+/* Predictor for the first column of the first row: 2^(P-Pt-1) */
+#define INITIAL_PREDICTORx	(1 << (cinfo->data_precision - cinfo->Al - 1))
+
+/* Predictor for the first column of the remaining rows: Rb */
+#define INITIAL_PREDICTOR2	GETJSAMPLE(prev_row[0])
+
+
+/*
+ * 1-Dimensional differencer routine.
+ *
+ * This macro implements the 1-D horizontal predictor (1).  INITIAL_PREDICTOR
+ * is used as the special case predictor for the first column, which must be
+ * either INITIAL_PREDICTOR2 or INITIAL_PREDICTORx.  The remaining samples
+ * use PREDICTOR1.
+ */
+
+#define DIFFERENCE_1D(INITIAL_PREDICTOR) \
+	j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec; \
+	c_pred_ptr pred = (c_pred_ptr) losslsc->pred_private; \
+	boolean restart = FALSE; \
+	int xindex; \
+	int samp, Ra; \
+ \
+	samp = GETJSAMPLE(input_buf[0]); \
+	diff_buf[0] = samp - INITIAL_PREDICTOR; \
+ \
+	for (xindex = 1; xindex < (int)width; xindex++) { \
+	  Ra = samp; \
+	  samp = GETJSAMPLE(input_buf[xindex]); \
+	  diff_buf[xindex] = samp - PREDICTOR1; \
+	} \
+ \
+	/* Account for restart interval (no-op if not using restarts) */ \
+	if (cinfo->restart_interval) { \
+	  if (--(pred->restart_rows_to_go[ci]) == 0) { \
+	    reset_predictor(cinfo, ci); \
+	    restart = TRUE; \
+	  } \
+	}
+
+
+/*
+ * 2-Dimensional differencer routine.
+ *
+ * This macro implements the 2-D horizontal predictors (#2-7).  PREDICTOR2 is
+ * used as the special case predictor for the first column.  The remaining
+ * samples use PREDICTOR, which is a function of Ra, Rb, Rc.
+ *
+ * Because prev_row and output_buf may point to the same storage area (in an
+ * interleaved image with Vi=1, for example), we must take care to buffer Rb/Rc
+ * before writing the current reconstructed sample value into output_buf.
+ */
+
+#define DIFFERENCE_2D(PREDICTOR) \
+	j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec; \
+	c_pred_ptr pred = (c_pred_ptr) losslsc->pred_private; \
+	int xindex; \
+	int samp, Ra, Rb, Rc; \
+ \
+	Rb = GETJSAMPLE(prev_row[0]); \
+	samp = GETJSAMPLE(input_buf[0]); \
+	diff_buf[0] = samp - PREDICTOR2; \
+ \
+	for (xindex = 1; xindex < (int)width; xindex++) { \
+	  Rc = Rb; \
+	  Rb = GETJSAMPLE(prev_row[xindex]); \
+	  Ra = samp; \
+	  samp = GETJSAMPLE(input_buf[xindex]); \
+	  diff_buf[xindex] = samp - PREDICTOR; \
+	} \
+ \
+	/* Account for restart interval (no-op if not using restarts) */ \
+	if (cinfo->restart_interval) { \
+	  if (--pred->restart_rows_to_go[ci] == 0) \
+	    reset_predictor(cinfo, ci); \
+	}
+
+
+/*
+ * Differencers for the all rows but the first in a scan or restart interval.
+ * The first sample in the row is differenced using the vertical
+ * predictor (2).  The rest of the samples are differenced using the
+ * predictor specified in the scan header.
+ */
+
+METHODDEF(void)
+jpeg_difference1(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_1D(INITIAL_PREDICTOR2);
+}
+
+METHODDEF(void)
+jpeg_difference2(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR2);
+}
+
+METHODDEF(void)
+jpeg_difference3(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR3);
+}
+
+METHODDEF(void)
+jpeg_difference4(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR4);
+}
+
+METHODDEF(void)
+jpeg_difference5(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR5);
+}
+
+METHODDEF(void)
+jpeg_difference6(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR6);
+}
+
+METHODDEF(void)
+jpeg_difference7(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_2D(PREDICTOR7);
+}
+
+
+/*
+ * Differencer for the first row in a scan or restart interval.  The first
+ * sample in the row is differenced using the special predictor constant
+ * x=2^(P-Pt-1).  The rest of the samples are differenced using the
+ * 1-D horizontal predictor (1).
+ */
+
+METHODDEF(void)
+jpeg_difference_first_row(j_compress_ptr cinfo, int ci,
+		 JSAMPROW input_buf, JSAMPROW prev_row,
+		 JDIFFROW diff_buf, JDIMENSION width)
+{
+  DIFFERENCE_1D(INITIAL_PREDICTORx);
+
+  /*
+   * Now that we have differenced the first row, we want to use the
+   * differencer which corresponds to the predictor specified in the
+   * scan header.
+   *
+   * Note that we don't to do this if we have just reset the predictor
+   * for a new restart interval.
+   */
+  if (!restart) {
+    switch (cinfo->Ss) {
+    case 1:
+      losslsc->predict_difference[ci] = jpeg_difference1;
+      break;
+    case 2:
+      losslsc->predict_difference[ci] = jpeg_difference2;
+      break;
+    case 3:
+      losslsc->predict_difference[ci] = jpeg_difference3;
+      break;
+    case 4:
+      losslsc->predict_difference[ci] = jpeg_difference4;
+      break;
+    case 5:
+      losslsc->predict_difference[ci] = jpeg_difference5;
+      break;
+    case 6:
+      losslsc->predict_difference[ci] = jpeg_difference6;
+      break;
+    case 7:
+      losslsc->predict_difference[ci] = jpeg_difference7;
+      break;
+    }
+  }
+}
+
+/*
+ * Reset predictor at the start of a pass or restart interval.
+ */
+
+LOCAL(void)
+reset_predictor (j_compress_ptr cinfo, int ci)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+  c_pred_ptr pred = (c_pred_ptr) losslsc->pred_private;
+
+  /* Initialize restart counter */
+  pred->restart_rows_to_go[ci] =
+    cinfo->restart_interval / cinfo->MCUs_per_row;
+
+  /* Set difference function to first row function */
+  losslsc->predict_difference[ci] = jpeg_difference_first_row;
+}
+
+
+/*
+ * Initialize for an input processing pass.
+ */
+
+METHODDEF(void)
+start_pass (j_compress_ptr cinfo)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+  c_pred_ptr pred = (c_pred_ptr) losslsc->pred_private;
+  int ci;
+
+  /* Check that the restart interval is an integer multiple of the number 
+   * of MCU in an MCU-row.
+   */
+  if (cinfo->restart_interval % cinfo->MCUs_per_row != 0)
+    ERREXIT2(cinfo, JERR_BAD_RESTART,
+	     cinfo->restart_interval, cinfo->MCUs_per_row);
+
+  /* Set predictors for start of pass */
+  for (ci = 0; ci < cinfo->num_components; ci++)
+    reset_predictor(cinfo, ci);
+}
+
+
+/*
+ * Module initialization routine for the differencer.
+ */
+
+GLOBAL(void)
+jinit_differencer (j_compress_ptr cinfo)
+{
+  j_lossless_c_ptr losslsc = (j_lossless_c_ptr) cinfo->codec;
+  c_pred_ptr pred;
+
+  pred = (c_pred_ptr)
+    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+				SIZEOF(c_predictor));
+  losslsc->pred_private = (void *) pred;
+  losslsc->predict_start_pass = start_pass;
+}
+
+#endif /* C_LOSSLESS_SUPPORTED */
+