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https://github.com/signalwire/freeswitch.git
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Started introducing T.42 JPEG support for FAXing, but its not plumbed into the
FAX engine yet.
This commit is contained in:
Steve Underwood committed
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8 files changed
+2081
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@@ -143,10 +143,6 @@ libspandsp_la_SOURCES = ademco_contactid.c \
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super_tone_rx.c \
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super_tone_tx.c \
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swept_tone.c \
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t4_t6_decode.c \
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t4_t6_encode.c \
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t4_rx.c \
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t4_tx.c \
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t30.c \
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t30_api.c \
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t30_logging.c \
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@@ -156,6 +152,11 @@ libspandsp_la_SOURCES = ademco_contactid.c \
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t38_gateway.c \
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t38_non_ecm_buffer.c \
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t38_terminal.c \
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t4_t6_decode.c \
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t4_t6_encode.c \
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t4_rx.c \
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t4_tx.c \
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t42.c \
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t81_t82_arith_coding.c \
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t85_decode.c \
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t85_encode.c \
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@@ -246,6 +247,7 @@ nobase_include_HEADERS = spandsp/ademco_contactid.h \
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spandsp/t4_tx.h \
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spandsp/t4_t6_decode.h \
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spandsp/t4_t6_encode.h \
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spandsp/t42.h \
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spandsp/t81_t82_arith_coding.h \
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spandsp/t85.h \
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spandsp/telephony.h \
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@@ -312,6 +314,7 @@ nobase_include_HEADERS = spandsp/ademco_contactid.h \
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spandsp/private/t4_tx.h \
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spandsp/private/t4_t6_decode.h \
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spandsp/private/t4_t6_encode.h \
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spandsp/private/t42.h \
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spandsp/private/t81_t82_arith_coding.h \
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spandsp/private/t85.h \
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spandsp/private/time_scale.h \
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@@ -109,7 +109,7 @@
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#include <spandsp/t4_t6_encode.h>
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#include <spandsp/t81_t82_arith_coding.h>
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#include <spandsp/t85.h>
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/*#include <spandsp/t42.h>*/
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#include <spandsp/t42.h>
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/*#include <spandsp/t43.h>*/
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#include <spandsp/t30.h>
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#include <spandsp/t30_api.h>
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@@ -80,7 +80,7 @@
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#include <spandsp/private/t4_t6_encode.h>
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#include <spandsp/private/t81_t82_arith_coding.h>
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#include <spandsp/private/t85.h>
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/*#include <spandsp/private/t42.h>*/
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#include <spandsp/private/t42.h>
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/*#include <spandsp/private/t43.h>*/
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#include <spandsp/private/t4_rx.h>
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#include <spandsp/private/t4_tx.h>
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@@ -0,0 +1,86 @@
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/*
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* SpanDSP - a series of DSP components for telephony
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*
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* private/t42.h - ITU T.42 JPEG for FAX image processing
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2011 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#if !defined(_SPANDSP_PRIVATE_T42_H_)
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#define _SPANDSP_PRIVATE_T42_H_
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struct lab_params_s
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{
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/* Lab gamut */
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float range_L;
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float range_a;
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float range_b;
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float offset_L;
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float offset_a;
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float offset_b;
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int ab_are_signed;
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/* Illuminant */
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float x_n;
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float y_n;
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float z_n;
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};
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/* State of a working instance of the T.42 JPEG FAX encoder */
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struct t42_encode_state_s
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{
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/*! \brief Callback function to read a row of pixels from the image source. */
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t4_row_read_handler_t row_read_handler;
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/*! \brief Opaque pointer passed to row_read_handler. */
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void *row_read_user_data;
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lab_params_t lab_params;
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/*! \brief Error and flow logging control */
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logging_state_t logging;
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};
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/* State of a working instance of the T.42 JPEG FAX decoder */
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struct t42_decode_state_s
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{
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/*! A callback routine to handle decoded pixel rows */
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t4_row_write_handler_t row_write_handler;
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/*! An opaque pointer passed to row_write_handler() */
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void *row_write_user_data;
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/*! A callback routine to handle decoded comments */
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t4_row_write_handler_t comment_handler;
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/*! An opaque pointer passed to comment_handler() */
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void *comment_user_data;
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lab_params_t lab_params;
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/*! The contents for a COMMENT marker segment, to be added to the
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image at the next opportunity. This is set to NULL when nothing is
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pending. */
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uint8_t *comment;
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/*! Length of data pointed to by comment */
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size_t comment_len;
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/*! \brief Error and flow logging control */
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logging_state_t logging;
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};
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#endif
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/*- End of file ------------------------------------------------------------*/
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@@ -0,0 +1,158 @@
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/*
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* SpanDSP - a series of DSP components for telephony
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*
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* t42.h - ITU T.42 JPEG for FAX image processing
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*
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* Written by Steve Underwood <steveu@coppice.org>
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*
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* Copyright (C) 2011 Steve Underwood
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 2.1,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*! \file */
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#if !defined(_SPANDSP_T42_H_)
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#define _SPANDSP_T42_H_
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/*! \page t42_page T.42 (JPEG for FAX) image compression and decompression
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\section t42_page_sec_1 What does it do?
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\section t42_page_sec_1 How does it work?
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*/
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/*! State of a working instance of the T.42 encoder */
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typedef struct t42_encode_state_s t42_encode_state_t;
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/*! State of a working instance of the T.42 decoder */
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typedef struct t42_decode_state_s t42_decode_state_t;
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typedef struct lab_params_s lab_params_t;
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#if defined(__cplusplus)
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extern "C"
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{
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#endif
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SPAN_DECLARE(void) srgb_to_lab(lab_params_t *s, uint8_t lab[], const uint8_t srgb[], int pixels);
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SPAN_DECLARE(void) lab_to_srgb(lab_params_t *s, uint8_t srgb[], const uint8_t lab[], int pixels);
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SPAN_DECLARE(void) set_lab_illuminant(lab_params_t *s, float new_xn, float new_yn, float new_zn);
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SPAN_DECLARE(void) set_lab_gamut(lab_params_t *s, int L_min, int L_max, int a_min, int a_max, int b_min, int b_max, int ab_are_signed);
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SPAN_DECLARE(void) set_lab_gamut2(lab_params_t *s, int L_P, int L_Q, int a_P, int a_Q, int b_P, int b_Q);
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SPAN_DECLARE(void) set_illuminant_from_code(lab_params_t *s, const uint8_t code[4]);
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SPAN_DECLARE(void) set_gamut_from_code(lab_params_t *s, const uint8_t code[12]);
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SPAN_DECLARE(int) t42_itulab_to_itulab(tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t width, uint32_t height, char *emsg, size_t max_emsg_bytes);
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SPAN_DECLARE(int) t42_itulab_to_jpeg(lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, char *emsg, size_t max_emsg_bytes);
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SPAN_DECLARE(int) t42_jpeg_to_itulab(lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, char *emsg, size_t max_emsg_bytes);
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SPAN_DECLARE(int) t42_srgb_to_itulab(lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t width, uint32_t height, char *emsg, size_t max_emsg_bytes);
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SPAN_DECLARE(int) t42_itulab_to_srgb(lab_params_t *s, tdata_t dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t *width, uint32_t *height, char *emsg, size_t max_emsg_bytes);
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SPAN_DECLARE(void) t42_encode_set_options(t42_encode_state_t *s,
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uint32_t l0,
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int mx,
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int options);
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SPAN_DECLARE(int) t42_encode_set_image_width(t42_encode_state_t *s, uint32_t image_width);
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SPAN_DECLARE(int) t42_encode_set_image_length(t42_encode_state_t *s, uint32_t length);
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SPAN_DECLARE(void) t42_encode_abort(t42_encode_state_t *s);
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SPAN_DECLARE(void) t42_encode_comment(t42_encode_state_t *s, const uint8_t comment[], size_t len);
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SPAN_DECLARE(int) t42_encode_get_byte(t42_encode_state_t *s);
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SPAN_DECLARE(int) t42_encode_get_chunk(t42_encode_state_t *s, uint8_t buf[], int max_len);
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SPAN_DECLARE(uint32_t) t42_encode_get_image_width(t42_encode_state_t *s);
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SPAN_DECLARE(uint32_t) t42_encode_get_image_length(t42_encode_state_t *s);
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SPAN_DECLARE(int) t42_encode_get_compressed_image_size(t42_encode_state_t *s);
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SPAN_DECLARE(int) t42_encode_set_row_read_handler(t42_encode_state_t *s,
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t4_row_read_handler_t handler,
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void *user_data);
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SPAN_DECLARE(int) t42_encode_restart(t42_encode_state_t *s, uint32_t image_width, uint32_t image_length);
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SPAN_DECLARE(t42_encode_state_t *) t42_encode_init(t42_encode_state_t *s,
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uint32_t image_width,
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uint32_t image_length,
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t4_row_read_handler_t handler,
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void *user_data);
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SPAN_DECLARE(int) t42_encode_release(t42_encode_state_t *s);
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SPAN_DECLARE(int) t42_encode_free(t42_encode_state_t *s);
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SPAN_DECLARE(void) t42_decode_rx_status(t42_decode_state_t *s, int status);
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SPAN_DECLARE(int) t42_decode_put_byte(t42_decode_state_t *s, int byte);
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SPAN_DECLARE(int) t42_decode_put_chunk(t42_decode_state_t *s,
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const uint8_t data[],
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size_t len);
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SPAN_DECLARE(int) t42_decode_set_row_write_handler(t42_decode_state_t *s,
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t4_row_write_handler_t handler,
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void *user_data);
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SPAN_DECLARE(int) t42_decode_set_comment_handler(t42_decode_state_t *s,
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uint32_t max_comment_len,
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t4_row_write_handler_t handler,
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void *user_data);
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SPAN_DECLARE(int) t42_decode_set_image_size_constraints(t42_decode_state_t *s,
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uint32_t max_xd,
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uint32_t max_yd);
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SPAN_DECLARE(uint32_t) t42_decode_get_image_width(t42_decode_state_t *s);
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SPAN_DECLARE(uint32_t) t42_decode_get_image_length(t42_decode_state_t *s);
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SPAN_DECLARE(int) t42_decode_get_compressed_image_size(t42_decode_state_t *s);
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SPAN_DECLARE(int) t42_decode_new_plane(t42_decode_state_t *s);
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SPAN_DECLARE(int) t42_decode_restart(t42_decode_state_t *s);
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SPAN_DECLARE(t42_decode_state_t *) t42_decode_init(t42_decode_state_t *s,
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t4_row_write_handler_t handler,
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void *user_data);
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SPAN_DECLARE(int) t42_decode_release(t42_decode_state_t *s);
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SPAN_DECLARE(int) t42_decode_free(t42_decode_state_t *s);
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/*- End of file ------------------------------------------------------------*/
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