Update to libjpeg_turbo 1.4.90

jdmaster.c

Index: jdmaster.c
diff --git a/jdmaster.c b/jdmaster.c
index f0dd15f6c1e9d4a43fa8a0fda207b135bf9b3582..7908849bf9faee5d52ce03e94c633873381967c2 100644
--- a/jdmaster.c
+++ b/jdmaster.c
@@ -5,10 +5,11 @@
  * Copyright (C) 1991-1997, Thomas G. Lane.
  * Modified 2002-2009 by Guido Vollbeding.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2009-2011, D. R. Commander.
+ * Copyright (C) 2009-2011, 2016, D. R. Commander.
  * Copyright (C) 2013, Linaro Limited.
-
- * For conditions of distribution and use, see the accompanying README file.
+ * Copyright (C) 2015, Google, Inc.
+ * For conditions of distribution and use, see the accompanying README.ijg
+ * file.
  *
  * This file contains master control logic for the JPEG decompressor.
  * These routines are concerned with selecting the modules to be executed
@@ -20,25 +21,7 @@
 #include "jinclude.h"
 #include "jpeglib.h"
 #include "jpegcomp.h"
-
-
-/* Private state */
-
-typedef struct {
-  struct jpeg_decomp_master pub; /* public fields */
-
-  int pass_number;		/* # of passes completed */
-
-  boolean using_merged_upsample; /* TRUE if using merged upsample/cconvert */
-
-  /* Saved references to initialized quantizer modules,
-   * in case we need to switch modes.
-   */
-  struct jpeg_color_quantizer * quantizer_1pass;
-  struct jpeg_color_quantizer * quantizer_2pass;
-} my_decomp_master;
-
-typedef my_decomp_master * my_master_ptr;
+#include "jdmaster.h"
 
 
 /*
@@ -87,7 +70,7 @@ use_merged_upsample (j_decompress_ptr cinfo)
       cinfo->comp_info[2]._DCT_scaled_size != cinfo->_min_DCT_scaled_size)
     return FALSE;
   /* ??? also need to test for upsample-time rescaling, when & if supported */
-  return TRUE;			/* by golly, it'll work... */
+  return TRUE;                  /* by golly, it'll work... */
 #else
   return FALSE;
 #endif
@@ -299,10 +282,10 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
        ci++, compptr++) {
     int ssize = cinfo->_min_DCT_scaled_size;
     while (ssize < DCTSIZE &&
-	   ((cinfo->max_h_samp_factor * cinfo->_min_DCT_scaled_size) %
-	    (compptr->h_samp_factor * ssize * 2) == 0) &&
-	   ((cinfo->max_v_samp_factor * cinfo->_min_DCT_scaled_size) %
-	    (compptr->v_samp_factor * ssize * 2) == 0)) {
+           ((cinfo->max_h_samp_factor * cinfo->_min_DCT_scaled_size) %
+            (compptr->h_samp_factor * ssize * 2) == 0) &&
+           ((cinfo->max_v_samp_factor * cinfo->_min_DCT_scaled_size) %
+            (compptr->v_samp_factor * ssize * 2) == 0)) {
       ssize = ssize * 2;
     }
 #if JPEG_LIB_VERSION >= 70
@@ -320,12 +303,12 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
     /* Size in samples, after IDCT scaling */
     compptr->downsampled_width = (JDIMENSION)
       jdiv_round_up((long) cinfo->image_width *
-		    (long) (compptr->h_samp_factor * compptr->_DCT_scaled_size),
-		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
+                    (long) (compptr->h_samp_factor * compptr->_DCT_scaled_size),
+                    (long) (cinfo->max_h_samp_factor * DCTSIZE));
     compptr->downsampled_height = (JDIMENSION)
       jdiv_round_up((long) cinfo->image_height *
-		    (long) (compptr->v_samp_factor * compptr->_DCT_scaled_size),
-		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
+                    (long) (compptr->v_samp_factor * compptr->_DCT_scaled_size),
+                    (long) (cinfo->max_v_samp_factor * DCTSIZE));
   }
 
 #else /* !IDCT_SCALING_SUPPORTED */
@@ -366,12 +349,12 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
   case JCS_YCCK:
     cinfo->out_color_components = 4;
     break;
-  default:			/* else must be same colorspace as in file */
+  default:                      /* else must be same colorspace as in file */
     cinfo->out_color_components = cinfo->num_components;
     break;
   }
   cinfo->output_components = (cinfo->quantize_colors ? 1 :
-			      cinfo->out_color_components);
+                              cinfo->out_color_components);
 
   /* See if upsampler will want to emit more than one row at a time */
   if (use_merged_upsample(cinfo))
@@ -388,20 +371,20 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
  * processes are inner loops and need to be as fast as possible.  On most
  * machines, particularly CPUs with pipelines or instruction prefetch,
  * a (subscript-check-less) C table lookup
- *		x = sample_range_limit[x];
+ *              x = sample_range_limit[x];
  * is faster than explicit tests
- *		if (x < 0)  x = 0;
- *		else if (x > MAXJSAMPLE)  x = MAXJSAMPLE;
+ *              if (x < 0)  x = 0;
+ *              else if (x > MAXJSAMPLE)  x = MAXJSAMPLE;
  * These processes all use a common table prepared by the routine below.
  *
  * For most steps we can mathematically guarantee that the initial value
  * of x is within MAXJSAMPLE+1 of the legal range, so a table running from
  * -(MAXJSAMPLE+1) to 2*MAXJSAMPLE+1 is sufficient.  But for the initial
- * limiting step (just after the IDCT), a wildly out-of-range value is 
+ * limiting step (just after the IDCT), a wildly out-of-range value is
  * possible if the input data is corrupt.  To avoid any chance of indexing
  * off the end of memory and getting a bad-pointer trap, we perform the
  * post-IDCT limiting thus:
- *		x = range_limit[x & MASK];
+ *              x = range_limit[x & MASK];
  * where MASK is 2 bits wider than legal sample data, ie 10 bits for 8-bit
  * samples.  Under normal circumstances this is more than enough range and
  * a correct output will be generated; with bogus input data the mask will
@@ -419,37 +402,34 @@ jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
  * We can save some space by overlapping the start of the post-IDCT table
  * with the simpler range limiting table.  The post-IDCT table begins at
  * sample_range_limit + CENTERJSAMPLE.
- *
- * Note that the table is allocated in near data space on PCs; it's small
- * enough and used often enough to justify this.
  */
 
 LOCAL(void)
 prepare_range_limit_table (j_decompress_ptr cinfo)
 /* Allocate and fill in the sample_range_limit table */
 {
-  JSAMPLE * table;
+  JSAMPLE *table;
   int i;
 
   table = (JSAMPLE *)
     (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-		(5 * (MAXJSAMPLE+1) + CENTERJSAMPLE) * SIZEOF(JSAMPLE));
-  table += (MAXJSAMPLE+1);	/* allow negative subscripts of simple table */
+                (5 * (MAXJSAMPLE+1) + CENTERJSAMPLE) * sizeof(JSAMPLE));
+  table += (MAXJSAMPLE+1);      /* allow negative subscripts of simple table */
   cinfo->sample_range_limit = table;
   /* First segment of "simple" table: limit[x] = 0 for x < 0 */
-  MEMZERO(table - (MAXJSAMPLE+1), (MAXJSAMPLE+1) * SIZEOF(JSAMPLE));
+  MEMZERO(table - (MAXJSAMPLE+1), (MAXJSAMPLE+1) * sizeof(JSAMPLE));
   /* Main part of "simple" table: limit[x] = x */
   for (i = 0; i <= MAXJSAMPLE; i++)
     table[i] = (JSAMPLE) i;
-  table += CENTERJSAMPLE;	/* Point to where post-IDCT table starts */
+  table += CENTERJSAMPLE;       /* Point to where post-IDCT table starts */
   /* End of simple table, rest of first half of post-IDCT table */
   for (i = CENTERJSAMPLE; i < 2*(MAXJSAMPLE+1); i++)
     table[i] = MAXJSAMPLE;
   /* Second half of post-IDCT table */
   MEMZERO(table + (2 * (MAXJSAMPLE+1)),
-	  (2 * (MAXJSAMPLE+1) - CENTERJSAMPLE) * SIZEOF(JSAMPLE));
+          (2 * (MAXJSAMPLE+1) - CENTERJSAMPLE) * sizeof(JSAMPLE));
   MEMCOPY(table + (4 * (MAXJSAMPLE+1) - CENTERJSAMPLE),
-	  cinfo->sample_range_limit, CENTERJSAMPLE * SIZEOF(JSAMPLE));
+          cinfo->sample_range_limit, CENTERJSAMPLE * sizeof(JSAMPLE));
 }
 
 
@@ -582,6 +562,12 @@ master_selection (j_decompress_ptr cinfo)
   /* Initialize input side of decompressor to consume first scan. */
   (*cinfo->inputctl->start_input_pass) (cinfo);
 
+  /* Set the first and last iMCU columns to decompress from single-scan images.
+   * By default, decompress all of the iMCU columns.
+   */
+  cinfo->master->first_iMCU_col = 0;
+  cinfo->master->last_iMCU_col = cinfo->MCUs_per_row - 1;
+
 #ifdef D_MULTISCAN_FILES_SUPPORTED
   /* If jpeg_start_decompress will read the whole file, initialize
    * progress monitoring appropriately.  The input step is counted
@@ -637,24 +623,24 @@ prepare_for_output_pass (j_decompress_ptr cinfo)
     if (cinfo->quantize_colors && cinfo->colormap == NULL) {
       /* Select new quantization method */
       if (cinfo->two_pass_quantize && cinfo->enable_2pass_quant) {
-	cinfo->cquantize = master->quantizer_2pass;
-	master->pub.is_dummy_pass = TRUE;
+        cinfo->cquantize = master->quantizer_2pass;
+        master->pub.is_dummy_pass = TRUE;
       } else if (cinfo->enable_1pass_quant) {
-	cinfo->cquantize = master->quantizer_1pass;
+        cinfo->cquantize = master->quantizer_1pass;
       } else {
-	ERREXIT(cinfo, JERR_MODE_CHANGE);
+        ERREXIT(cinfo, JERR_MODE_CHANGE);
       }
     }
     (*cinfo->idct->start_pass) (cinfo);
     (*cinfo->coef->start_output_pass) (cinfo);
     if (! cinfo->raw_data_out) {
       if (! master->using_merged_upsample)
-	(*cinfo->cconvert->start_pass) (cinfo);
+        (*cinfo->cconvert->start_pass) (cinfo);
       (*cinfo->upsample->start_pass) (cinfo);
       if (cinfo->quantize_colors)
-	(*cinfo->cquantize->start_pass) (cinfo, master->pub.is_dummy_pass);
+        (*cinfo->cquantize->start_pass) (cinfo, master->pub.is_dummy_pass);
       (*cinfo->post->start_pass) (cinfo,
-	    (master->pub.is_dummy_pass ? JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
+            (master->pub.is_dummy_pass ? JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
       (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
     }
   }
@@ -663,7 +649,7 @@ prepare_for_output_pass (j_decompress_ptr cinfo)
   if (cinfo->progress != NULL) {
     cinfo->progress->completed_passes = master->pass_number;
     cinfo->progress->total_passes = master->pass_number +
-				    (master->pub.is_dummy_pass ? 2 : 1);
+                                    (master->pub.is_dummy_pass ? 2 : 1);
     /* In buffered-image mode, we assume one more output pass if EOI not
      * yet reached, but no more passes if EOI has been reached.
      */
@@ -726,16 +712,13 @@ jpeg_new_colormap (j_decompress_ptr cinfo)
 GLOBAL(void)
 jinit_master_decompress (j_decompress_ptr cinfo)
 {
-  my_master_ptr master;
+  my_master_ptr master = (my_master_ptr) cinfo->master;
 
-  master = (my_master_ptr)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  SIZEOF(my_decomp_master));
-  cinfo->master = (struct jpeg_decomp_master *) master;
   master->pub.prepare_for_output_pass = prepare_for_output_pass;
   master->pub.finish_output_pass = finish_output_pass;
 
   master->pub.is_dummy_pass = FALSE;
+  master->pub.jinit_upsampler_no_alloc = FALSE;
 
   master_selection(cinfo);
 }