From a7f4ebff7116347d69dd8030b15b800a4d6bef27 Mon Sep 17 00:00:00 2001
From: David Monniaux <david.monniaux@univ-grenoble-alpes.fr>
Date: Fri, 1 Feb 2019 19:22:37 +0100
Subject: removed some switches

---
 test/monniaux/jpeg-6b/jdapimin.c | 103 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 102 insertions(+), 1 deletion(-)

(limited to 'test/monniaux/jpeg-6b/jdapimin.c')

diff --git a/test/monniaux/jpeg-6b/jdapimin.c b/test/monniaux/jpeg-6b/jdapimin.c
index cadb59fc..ef09983b 100644
--- a/test/monniaux/jpeg-6b/jdapimin.c
+++ b/test/monniaux/jpeg-6b/jdapimin.c
@@ -116,6 +116,63 @@ default_decompress_parms (j_decompress_ptr cinfo)
   /* Guess the input colorspace, and set output colorspace accordingly. */
   /* (Wish JPEG committee had provided a real way to specify this...) */
   /* Note application may override our guesses. */
+
+#ifdef NO_SWITCH
+  int choice = cinfo->num_components;
+  if (choice == 1) {
+    cinfo->jpeg_color_space = JCS_GRAYSCALE;
+    cinfo->out_color_space = JCS_GRAYSCALE;
+  } else if (choice == 3) {
+    if (cinfo->saw_JFIF_marker) {
+      cinfo->jpeg_color_space = JCS_YCbCr; /* JFIF implies YCbCr */
+    } else if (cinfo->saw_Adobe_marker) {
+      int choice2 = cinfo->Adobe_transform;
+      if (choice2 == 0) {
+	cinfo->jpeg_color_space = JCS_RGB;
+      } else if (choice2 == 1) {
+	cinfo->jpeg_color_space = JCS_YCbCr;
+      } else {
+	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
+      }
+    } else {
+      /* Saw no special markers, try to guess from the component IDs */
+      int cid0 = cinfo->comp_info[0].component_id;
+      int cid1 = cinfo->comp_info[1].component_id;
+      int cid2 = cinfo->comp_info[2].component_id;
+
+      if (cid0 == 1 && cid1 == 2 && cid2 == 3)
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume JFIF w/out marker */
+      else if (cid0 == 82 && cid1 == 71 && cid2 == 66)
+	cinfo->jpeg_color_space = JCS_RGB; /* ASCII 'R', 'G', 'B' */
+      else {
+	TRACEMS3(cinfo, 1, JTRC_UNKNOWN_IDS, cid0, cid1, cid2);
+	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
+      }
+    }
+    /* Always guess RGB is proper output colorspace. */
+    cinfo->out_color_space = JCS_RGB;
+  } else if (choice == 4) {
+    if (cinfo->saw_Adobe_marker) {
+      int choice2 = cinfo->Adobe_transform;
+      if (choice2 == 0) {
+	cinfo->jpeg_color_space = JCS_CMYK;
+      } else if (choice2 == 2) {
+	cinfo->jpeg_color_space = JCS_YCCK;
+      } else {
+	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
+	cinfo->jpeg_color_space = JCS_YCCK; /* assume it's YCCK */
+      }
+    } else {
+      /* No special markers, assume straight CMYK. */
+      cinfo->jpeg_color_space = JCS_CMYK;
+    }
+    cinfo->out_color_space = JCS_CMYK;
+  } else {
+    cinfo->jpeg_color_space = JCS_UNKNOWN;
+    cinfo->out_color_space = JCS_UNKNOWN;
+  }
+#else
   switch (cinfo->num_components) {
   case 1:
     cinfo->jpeg_color_space = JCS_GRAYSCALE;
@@ -183,11 +240,14 @@ default_decompress_parms (j_decompress_ptr cinfo)
     cinfo->out_color_space = JCS_UNKNOWN;
     break;
   }
-
+#endif
+  
   /* Set defaults for other decompression parameters. */
   cinfo->scale_num = 1;		/* 1:1 scaling */
   cinfo->scale_denom = 1;
+#ifdef HAS_FLOAT
   cinfo->output_gamma = 1.0;
+#endif
   cinfo->buffered_image = FALSE;
   cinfo->raw_data_out = FALSE;
   cinfo->dct_method = JDCT_DEFAULT;
@@ -289,6 +349,45 @@ jpeg_consume_input (j_decompress_ptr cinfo)
   int retcode = JPEG_SUSPENDED;
 
   /* NB: every possible DSTATE value should be listed in this switch */
+#ifdef NO_SWITCH
+  int choice = cinfo->global_state;
+  if (choice == DSTATE_START) {
+    /* Start-of-datastream actions: reset appropriate modules */
+    (*cinfo->inputctl->reset_input_controller) (cinfo);
+    /* Initialize application's data source module */
+    (*cinfo->src->init_source) (cinfo);
+    cinfo->global_state = DSTATE_INHEADER;
+    /*FALLTHROUGH*/
+    retcode = (*cinfo->inputctl->consume_input) (cinfo);
+    if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
+      /* Set up default parameters based on header data */
+      default_decompress_parms(cinfo);
+      /* Set global state: ready for start_decompress */
+      cinfo->global_state = DSTATE_READY;
+    }
+  } else if (choice == DSTATE_INHEADER) {
+    retcode = (*cinfo->inputctl->consume_input) (cinfo);
+    if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
+      /* Set up default parameters based on header data */
+      default_decompress_parms(cinfo);
+      /* Set global state: ready for start_decompress */
+      cinfo->global_state = DSTATE_READY;
+    }
+  } else if (choice == DSTATE_READY) {
+    /* Can't advance past first SOS until start_decompress is called */
+    retcode = JPEG_REACHED_SOS;
+  } else if (choice == DSTATE_PRELOAD ||
+	     choice == DSTATE_PRESCAN ||
+	     choice == DSTATE_SCANNING ||
+	     choice == DSTATE_RAW_OK ||
+	     choice == DSTATE_BUFIMAGE ||
+	     choice == DSTATE_BUFPOST ||
+	     choice == DSTATE_STOPPING) {
+    retcode = (*cinfo->inputctl->consume_input) (cinfo);
+  } else {
+    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
+  }
+#else
   switch (cinfo->global_state) {
   case DSTATE_START:
     /* Start-of-datastream actions: reset appropriate modules */
@@ -322,6 +421,8 @@ jpeg_consume_input (j_decompress_ptr cinfo)
   default:
     ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
   }
+#endif
+  KILL_TAIL_CALL();
   return retcode;
 }
 
-- 
cgit