From 9b551a7d5bd2082f0ba641c5ff01bf0aced82952 Mon Sep 17 00:00:00 2001 From: Didier Raboud Date: Mon, 29 Aug 2011 13:30:00 +0200 Subject: Imported Upstream version 1.3 --- pxl_jpeg.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 pxl_jpeg.c (limited to 'pxl_jpeg.c') 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 +#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; +} -- cgit v1.2.3