add 12bit default huffman tables (#2809979)

2 files changed, 83 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index b4a6013..ead1327 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2009-06-23  Frank Warmerdam  <warmerdam@pobox.com>
+
+	* jcparam.c: add 12bit default huffman tables.
+	https://sourceforge.net/tracker/?func=detail&aid=2809979&group_id=159521&atid=812162
+
 2009-06-21  Frank Warmerdam  <warmerdam@pobox.com>
 
 	* rdppm.c, wrppm.c: Fix byte order for 16bit pnm. Should be bigendian.
diff --git a/jcparam.c b/jcparam.c
index 6fc48f5..a086946 100644
--- a/jcparam.c
+++ b/jcparam.c
@@ -178,6 +178,7 @@ add_huff_table (j_compress_ptr cinfo,
 }
 
 
+#if BITS_IN_JSAMPLE == 8
 LOCAL(void)
 std_huff_tables (j_compress_ptr cinfo)
 /* Set up the standard Huffman tables (cf. JPEG standard section K.3) */
@@ -252,6 +253,83 @@ std_huff_tables (j_compress_ptr cinfo)
   add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
 		 bits_ac_chrominance, val_ac_chrominance);
 }
+#endif /* BITS_IN_JSAMPLE == 8 */
+
+#if BITS_IN_JSAMPLE == 12
+LOCAL(void)
+std_huff_tables (j_compress_ptr cinfo)
+/* 
+ * Note: these are not really "standard" since the specification includes
+ * no 12bit tables.  But they should work with any image, and at least
+ * moderately adequate as default tables.  
+ * https://sourceforge.net/tracker/?func=detail&aid=2809979&group_id=159521&atid=812162
+ */
+{
+  static const UINT8 bits_dc_luminance[17] =
+      { /* 0-base */ 0, 0, 2, 3, 1, 0, 3, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
+  static const UINT8 val_dc_luminance[] =
+      { 8, 9, 6, 7, 10, 5, 3, 4, 11, 2, 0, 1, 12 };
+
+  static const UINT8 bits_dc_chrominance[17] =
+      { 0, 0, 2, 2, 2, 3, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 };
+  static const UINT8 val_dc_chrominance[] =
+      { 6, 7, 5, 8, 4, 9, 2, 3, 10, 1, 11, 0, 12 };
+
+  static const UINT8 bits_ac_luminance[17] =
+      { 0, 0, 1, 4, 2, 2, 2, 1, 4, 1, 2, 0, 1, 0, 1, 0, 235 };
+
+  static const UINT8 val_ac_luminance[] =
+  {
+0x02,0x01,0x03,0x04,0x05,0x06,0x07,0x08,0x12,0x09,0x11,0x13,0x00,0x14,0x21,0x22
+,0x15,0x0a,0x23,0x31,0x16,0x32,0x17,0x24,0x33,0x41,0x18,0x25,0x42,0x51,0x0b,0x26
+,0x19,0x43,0x52,0x61,0x35,0x62,0x71,0x0c,0x0d,0x0e,0x0f,0x10,0x1a,0x1b,0x1c,0x1d
+,0x1e,0x1f,0x20,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x30,0x34,0x36,0x37
+,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,0x40,0x44,0x45,0x46,0x47,0x48,0x49,0x4a
+,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c
+,0x5d,0x5e,0x5f,0x60,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e
+,0x6f,0x70,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f
+,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f
+,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f
+,0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf
+,0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf
+,0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf
+,0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf
+,0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef
+,0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
+  };
+
+  static const UINT8 bits_ac_chrominance[17] =
+      { 0, 0, 1, 3, 2, 5, 1, 5, 5, 3, 7, 4, 4, 3, 4, 6, 203 };
+  static const UINT8 val_ac_chrominance[] = 
+      {
+0x01,0x02,0x03,0x11,0x04,0x21,0x00,0x05,0x06,0x12,0x31,0x41,0x07,0x13,0x22,0x51
+,0x61,0x08,0x14,0x32,0x71,0x81,0x42,0x91,0xa1,0x09,0x15,0x23,0x52,0xb1,0xc1,0xf0
+,0x16,0x62,0xd1,0xe1,0x0a,0x24,0x72,0xf1,0x17,0x82,0x92,0x33,0x43,0x53,0xb2,0x0b
+,0x0c,0x18,0x35,0xa2,0xc2,0x0d,0x0e,0x0f,0x10,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f
+,0x20,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x30,0x34,0x36,0x37
+,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,0x40,0x44,0x45,0x46,0x47,0x48,0x49,0x4a
+,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d
+,0x5e,0x5f,0x60,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f
+,0x70,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,0x80,0x83
+,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,0x90,0x93,0x94,0x95
+,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,0xa0,0xa3,0xa4,0xa5,0xa6,0xa7
+,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9
+,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,0xc0,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb
+,0xcc,0xcd,0xce,0xcf,0xd0,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc
+,0xdd,0xde,0xdf,0xe0,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed
+,0xee,0xef,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
+      };
+
+  add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[0],
+		 bits_dc_luminance, val_dc_luminance);
+  add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[0],
+		 bits_ac_luminance, val_ac_luminance);
+  add_huff_table(cinfo, &cinfo->dc_huff_tbl_ptrs[1],
+		 bits_dc_chrominance, val_dc_chrominance);
+  add_huff_table(cinfo, &cinfo->ac_huff_tbl_ptrs[1],
+		 bits_ac_chrominance, val_ac_chrominance);
+}
+#endif /* BITS_IN_JSAMPLE == 12 */
 
 
 /*