Imported Upstream version 1.3

1 files changed, 84 insertions, 0 deletions

diff --git a/pxl_jpeg.c b/pxl_jpeg.c
new file mode 100644
index 0000000..df556de
--- /dev/null
+++ b/pxl_jpeg.c
@@ -0,0 +1,84 @@
+/**
+ * Copyright (c) 2005 Hin-Tak Leung. All rights reserved.
+ *
+ **/
+/*
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+/**
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ **/
+
+#include <stdio.h>
+#define JPEG_INTERNALS
+#include "jinclude.h"
+#include "jpeglib.h"
+#include "i_job_info.h"
+
+
+EXTERN(void) rgb_jrycc_start (j_compress_ptr cinfo);
+
+EXTERN(void) rgb_jrycc_convert (j_compress_ptr cinfo,
+			JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
+			JDIMENSION output_row, int num_rows);
+
+/* jpeg quantization table */
+static unsigned int qtable[64] = { 2,3,4,5,5,5,5,5,
+				   3,6,5,8,5,8,5,8,
+				   4,5,5,5,5,5,5,5,
+				   5,8,5,8,5,8,5,8,
+				   5,5,5,5,5,5,5,5,
+				   5,8,5,8,5,8,5,8,
+				   5,5,5,5,5,5,5,5,
+				   5,8,5,8,5,8,5,8 };
+
+void pxl_set_jpeg_custom_params(i_job_info_t *job_info)
+{
+  int i,j;
+
+  /* the driver uses 1 for auto setting, 6 for max compression */
+  int qfactor = job_info->qfactor; 
+  
+  for(i = 0; i < 3; i++)
+    {
+      jpeg_add_quant_table(job_info->cinfo, i, qtable, 0, FALSE);
+      
+      for(j =0; j < 64; j++)
+	{
+	  job_info->cinfo->quant_tbl_ptrs[i]->quantval[j] = qtable[j] * qfactor ;
+	}
+
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[0] = qtable[0];
+ 
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[1] = qtable[1] * (1 + (qfactor - 1) * 0.25) + 0.5;
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[8] = qtable[8] * (1 + (qfactor - 1) * 0.25) + 0.5;
+
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[2]  = qtable[2]  * (1 + (qfactor - 1) * 0.5) + 0.5;
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[9]  = qtable[9]  * (1 + (qfactor - 1) * 0.5) + 0.5;
+      job_info->cinfo->quant_tbl_ptrs[i]->quantval[16] = qtable[16] * (1 + (qfactor - 1) * 0.5) + 0.5;
+
+    }
+
+  job_info->cinfo->comp_info[0].h_samp_factor = 1;
+  job_info->cinfo->comp_info[0].v_samp_factor = 1;
+  return;
+}