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freeswitch/libs/spandsp/src/t42.c
Steve Underwood 887c373c92 Tweaks
2012-08-26 18:12:44 +08:00

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/*
* SpanDSP - a series of DSP components for telephony
*
* t42.c - ITU T.42 JPEG for FAX image processing
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2011 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*! \file */
#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif
#include <stdlib.h>
#include <inttypes.h>
#include <limits.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <memory.h>
#include <string.h>
#if defined(HAVE_TGMATH_H)
#include <tgmath.h>
#endif
#if defined(HAVE_MATH_H)
#include <math.h>
#endif
#include "floating_fudge.h"
#include <tiffio.h>
#include <assert.h>
#include <jpeglib.h>
#include <setjmp.h>
#include "spandsp/telephony.h"
#include "spandsp/fast_convert.h"
#include "spandsp/logging.h"
#include "spandsp/saturated.h"
#include "spandsp/async.h"
#include "spandsp/timezone.h"
#include "spandsp/t4_rx.h"
#include "spandsp/t4_tx.h"
#include "spandsp/t81_t82_arith_coding.h"
#include "spandsp/t85.h"
#include "spandsp/t42.h"
#include "spandsp/private/logging.h"
#include "spandsp/private/t81_t82_arith_coding.h"
#include "spandsp/private/t85.h"
#include "spandsp/private/t42.h"
#define T42_USE_LUTS
#include "t42_t43_local.h"
#if defined(T42_USE_LUTS)
#include "cielab_luts.h"
#endif
typedef struct
{
float L;
float a;
float b;
} cielab_t;
typedef struct
{
uint8_t tag[5];
const char *name;
float xn;
float yn;
float zn;
} illuminant_t;
typedef struct
{
jmp_buf escape;
char error_message[JMSG_LENGTH_MAX];
} escape_route_t;
static const illuminant_t illuminants[] =
{
{"\0D50", "CIE D50/2°", 96.422f, 100.000f, 82.521f},
{"", "CIE D50/10°", 96.720f, 100.000f, 81.427f},
{"", "CIE D55/2°", 95.682f, 100.000f, 92.149f},
{"", "CIE D55/10°", 95.799f, 100.000f, 90.926f},
{"\0D65", "CIE D65/2°", 95.047f, 100.000f, 108.883f},
{"", "CIE D65/10°", 94.811f, 100.000f, 107.304f},
{"\0D75", "CIE D75/2°", 94.972f, 100.000f, 122.638f},
{"", "CIE D75/10°", 94.416f, 100.000f, 120.641f},
{"\0\0F2", "F02/2°", 99.186f, 100.000f, 67.393f},
{"", "F02/10°", 103.279f, 100.000f, 69.027f},
{"\0\0F7", "F07/2°", 95.041f, 100.000f, 108.747f},
{"", "F07/10°", 95.792f, 100.000f, 107.686f},
{"\0F11", "F11/2°", 100.962f, 100.000f, 64.350f},
{"", "F11/10°", 103.863f, 100.000f, 65.607f},
{"\0\0SA", "A/2°", 109.850f, 100.000f, 35.585f},
{"", "A/10°", 111.144f, 100.000f, 35.200f},
{"\0\0SC", "C/2°", 98.074f, 100.000f, 118.232f},
{"", "C/10°", 97.285f, 100.000f, 116.145f},
{"", "", 0.000f, 0.000f, 0.000f}
};
/* This is the error catcher */
static struct jpeg_error_mgr error_handler;
static __inline__ uint16_t pack_16(const uint8_t *s)
{
uint16_t value;
value = ((uint16_t) s[0] << 8) | (uint16_t) s[1];
return value;
}
/*- End of function --------------------------------------------------------*/
static __inline__ uint32_t pack_32(const uint8_t *s)
{
uint32_t value;
value = ((uint32_t) s[0] << 24) | ((uint32_t) s[1] << 16) | ((uint32_t) s[2] << 8) | (uint32_t) s[3];
return value;
}
/*- End of function --------------------------------------------------------*/
static __inline__ int unpack_16(uint8_t *s, uint16_t value)
{
s[0] = (value >> 8) & 0xFF;
s[1] = value & 0xFF;
return sizeof(uint16_t);
}
/*- End of function --------------------------------------------------------*/
/* Error handler for IJG library */
static void jpg_error_exit(j_common_ptr cinfo)
{
escape_route_t *escape;
escape = (escape_route_t *) cinfo->client_data;
(*cinfo->err->format_message)(cinfo, escape->error_message);
longjmp(escape->escape, 1);
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) set_lab_illuminant(lab_params_t *s, float new_xn, float new_yn, float new_zn)
{
if (new_yn > 10.0f)
{
s->x_n = new_xn/100.0f;
s->y_n = new_yn/100.0f;
s->z_n = new_zn/100.0f;
}
else
{
s->x_n = new_xn;
s->y_n = new_yn;
s->z_n = new_zn;
}
}
/*- End of function --------------------------------------------------------*/
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)
{
s->range_L = L_max - L_min;
s->range_a = a_max - a_min;
s->range_b = b_max - b_min;
s->offset_L = -256.0f*L_min/s->range_L;
s->offset_a = -256.0f*a_min/s->range_a;
s->offset_b = -256.0f*b_min/s->range_b;
s->range_L /= (256.0f - 1.0f);
s->range_a /= (256.0f - 1.0f);
s->range_b /= (256.0f - 1.0f);
s->ab_are_signed = ab_are_signed;
}
/*- End of function --------------------------------------------------------*/
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)
{
s->range_L = L_Q/(256.0f - 1.0f);
s->range_a = a_Q/(256.0f - 1.0f);
s->range_b = b_Q/(256.0f - 1.0f);
s->offset_L = L_P;
s->offset_a = a_P;
s->offset_b = b_P;
s->ab_are_signed = FALSE;
}
/*- End of function --------------------------------------------------------*/
void set_illuminant_from_code(logging_state_t *logging, lab_params_t *s, const uint8_t code[4])
{
int i;
int colour_temp;
if (code[0] == 'C' && code[1] == 'T')
{
colour_temp = pack_16(&code[2]);
span_log(logging, SPAN_LOG_FLOW, "Illuminant colour temp %dK\n", colour_temp);
return;
}
for (i = 0; illuminants[i].name[0]; i++)
{
if (memcmp(code, illuminants[i].tag, 4) == 0)
{
span_log(logging, SPAN_LOG_FLOW, "Illuminant %s\n", illuminants[i].name);
set_lab_illuminant(s, illuminants[i].xn, illuminants[i].yn, illuminants[i].zn);
break;
}
}
if (illuminants[i].name[0] == '\0')
span_log(logging, SPAN_LOG_FLOW, "Unrecognised illuminant 0x%x 0x%x 0x%x 0x%x\n", code[0], code[1], code[2], code[3]);
}
/*- End of function --------------------------------------------------------*/
void set_gamut_from_code(logging_state_t *logging, lab_params_t *s, const uint8_t code[12])
{
int i;
int val[6];
for (i = 0; i < 6; i++)
val[i] = pack_16(&code[2*i]);
span_log(logging,
SPAN_LOG_FLOW,
"Gamut L=[%d,%d], a*=[%d,%d], b*=[%d,%d]\n",
val[0],
val[1],
val[2],
val[3],
val[4],
val[5]);
set_lab_gamut2(s, val[0], val[1], val[2], val[3], val[4], val[5]);
}
/*- End of function --------------------------------------------------------*/
static int is_itu_fax(logging_state_t *logging, lab_params_t *s, jpeg_saved_marker_ptr ptr)
{
const uint8_t *data;
int ok;
int val[2];
int i;
ok = FALSE;
while (ptr)
{
if (ptr->marker == (JPEG_APP0 + 1) && ptr->data_length >= 6)
{
/* Markers are:
JPEG_RST0
JPEG_EOI
JPEG_APP0
JPEG_COM */
data = (const uint8_t *) ptr->data;
if (strncmp((const char *) data, "G3FAX", 5) == 0)
{
switch (data[5])
{
case 0:
for (i = 0; i < 2; i++)
val[i] = pack_16(&data[6 + 2*i]);
span_log(logging, SPAN_LOG_FLOW, "Version %d, resolution %d dpi\n", val[0], val[1]);
ok = TRUE;
break;
case 1:
span_log(logging, SPAN_LOG_FLOW, "Set gamut\n");
if (ptr->data_length >= 6 + 12)
{
set_gamut_from_code(logging, s, &data[6]);
ok = TRUE;
}
else
{
span_log(logging, SPAN_LOG_FLOW, "Got bad G3FAX1 length - %d\n", ptr->data_length);
}
break;
case 2:
span_log(logging, SPAN_LOG_FLOW, "Set illuminant\n");
if (ptr->data_length >= 6 + 4)
{
set_illuminant_from_code(logging, s, &data[6]);
ok = TRUE;
}
else
{
span_log(logging, SPAN_LOG_FLOW, "Got bad G3FAX2 length - %d\n", ptr->data_length);
}
break;
case 3:
/* Colour palette table */
span_log(logging, SPAN_LOG_FLOW, "Set colour palette\n");
if (ptr->data_length >= 6 + 2)
{
val[0] = pack_16(&data[6]);
span_log(logging, SPAN_LOG_FLOW, "Colour palette %d\n", val[0]);
}
else
{
span_log(logging, SPAN_LOG_FLOW, "Got bad G3FAX3 length - %d\n", ptr->data_length);
}
break;
default:
span_log(logging, SPAN_LOG_FLOW, "Got unexpected G3FAX%d length - %d\n", data[5], ptr->data_length);
break;
}
}
}
else
{
span_log(logging, SPAN_LOG_FLOW, "Got marker 0x%x, length %d\n", ptr->marker, ptr->data_length);
span_log_buf(logging, SPAN_LOG_FLOW, "Got marker", (const uint8_t *) ptr->data, ptr->data_length);
}
ptr = ptr->next;
}
return ok;
}
/*- End of function --------------------------------------------------------*/
static void set_itu_fax(j_compress_ptr cinfo)
{
uint8_t marker[10] =
{
'G', '3', 'F', 'A', 'X', '\x00', '\x07', '\xCA', '\x00', '\x00'
};
unpack_16(marker + 8, 200);
jpeg_write_marker(cinfo, (JPEG_APP0 + 1), marker, 10);
}
/*- End of function --------------------------------------------------------*/
static __inline__ void itu_to_lab(lab_params_t *s, cielab_t *lab, const uint8_t in[3])
{
uint8_t a;
uint8_t b;
/* T.4 E.6.4 */
lab->L = s->range_L*(in[0] - s->offset_L);
a = in[1];
b = in[2];
if (s->ab_are_signed)
{
a += 128;
b += 128;
}
lab->a = s->range_a*(a - s->offset_a);
lab->b = s->range_b*(b - s->offset_b);
}
/*- End of function --------------------------------------------------------*/
static __inline__ void lab_to_itu(lab_params_t *s, uint8_t out[3], const cielab_t *lab)
{
/* T.4 E.6.4 */
out[0] = saturateu8(floorf(lab->L/s->range_L + s->offset_L));
out[1] = saturateu8(floorf(lab->a/s->range_a + s->offset_a));
out[2] = saturateu8(floorf(lab->b/s->range_b + s->offset_b));
if (s->ab_are_signed)
{
out[1] -= 128;
out[2] -= 128;
}
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) srgb_to_lab(lab_params_t *s, uint8_t lab[], const uint8_t srgb[], int pixels)
{
float x;
float y;
float z;
float r;
float g;
float b;
float xx;
float yy;
float zz;
cielab_t l;
int i;
for (i = 0; i < 3*pixels; i += 3)
{
#if defined(T42_USE_LUTS)
r = srgb_to_linear[srgb[i]];
g = srgb_to_linear[srgb[i + 1]];
b = srgb_to_linear[srgb[i + 2]];
#else
r = srgb[i]/256.0f;
g = srgb[i + 1]/256.0f;
b = srgb[i + 2]/256.0f;
/* sRGB to linear RGB */
r = (r > 0.04045f) ? powf((r + 0.055f)/1.055f, 2.4f) : r/12.92f;
g = (g > 0.04045f) ? powf((g + 0.055f)/1.055f, 2.4f) : g/12.92f;
b = (b > 0.04045f) ? powf((b + 0.055f)/1.055f, 2.4f) : b/12.92f;
#endif
/* Linear RGB to XYZ */
x = 0.4124f*r + 0.3576f*g + 0.1805f*b;
y = 0.2126f*r + 0.7152f*g + 0.0722f*b;
z = 0.0193f*r + 0.1192f*g + 0.9505f*b;
/* Normalise for the illuminant */
x /= s->x_n;
y /= s->y_n;
z /= s->z_n;
/* XYZ to Lab */
xx = (x <= 0.008856f) ? (7.787f*x + 0.1379f) : cbrtf(x);
yy = (y <= 0.008856f) ? (7.787f*y + 0.1379f) : cbrtf(y);
zz = (z <= 0.008856f) ? (7.787f*z + 0.1379f) : cbrtf(z);
l.L = 116.0f*yy - 16.0f;
l.a = 500.0f*(xx - yy);
l.b = 200.0f*(yy - zz);
lab_to_itu(s, lab, &l);
lab += 3;
}
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) lab_to_srgb(lab_params_t *s, uint8_t srgb[], const uint8_t lab[], int pixels)
{
float x;
float y;
float z;
float r;
float g;
float b;
float ll;
cielab_t l;
int val;
int i;
for (i = 0; i < 3*pixels; i += 3)
{
itu_to_lab(s, &l, lab);
/* Lab to XYZ */
ll = (1.0f/116.0f)*(l.L + 16.0f);
y = ll;
y = (y <= 0.2068f) ? (0.1284f*(y - 0.1379f)) : y*y*y;
x = ll + (1.0f/500.0f)*l.a;
x = (x <= 0.2068f) ? (0.1284f*(x - 0.1379f)) : x*x*x;
z = ll - (1.0f/200.0f)*l.b;
z = (z <= 0.2068f) ? (0.1284f*(z - 0.1379f)) : z*z*z;
/* Normalise for the illuminant */
x *= s->x_n;
y *= s->y_n;
z *= s->z_n;
/* XYZ to linear RGB */
r = 3.2406f*x - 1.5372f*y - 0.4986f*z;
g = -0.9689f*x + 1.8758f*y + 0.0415f*z;
b = 0.0557f*x - 0.2040f*y + 1.0570f*z;
#if defined(T42_USE_LUTS)
val = r*4096.0f;
srgb[i] = linear_to_srgb[(val < 0) ? 0 : (val < 4095) ? val : 4095];
val = g*4096.0f;
srgb[i + 1] = linear_to_srgb[(val < 0) ? 0 : (val < 4095) ? val : 4095];
val = b*4096.0f;
srgb[i + 2] = linear_to_srgb[(val < 0) ? 0 : (val < 4095) ? val : 4095];
#else
/* Linear RGB to sRGB */
r = (r > 0.0031308f) ? (1.055f*powf(r, 1.0f/2.4f) - 0.055f) : r*12.92f;
g = (g > 0.0031308f) ? (1.055f*powf(g, 1.0f/2.4f) - 0.055f) : g*12.92f;
b = (b > 0.0031308f) ? (1.055f*powf(b, 1.0f/2.4f) - 0.055f) : b*12.92f;
srgb[i] = saturateu8(floorf(r*256.0f));
srgb[i + 1] = saturateu8(floorf(g*256.0f));
srgb[i + 2] = saturateu8(floorf(b*256.0f));
#endif
lab += 3;
}
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_itulab_to_jpeg(logging_state_t *logging, lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen)
{
struct jpeg_decompress_struct decompressor;
struct jpeg_compress_struct compressor;
FILE *in;
FILE *out;
int m;
JSAMPROW scan_line_in;
JSAMPROW scan_line_out;
escape_route_t escape;
#if defined(HAVE_OPEN_MEMSTREAM)
char *outptr;
size_t outsize;
#endif
escape.error_message[0] = '\0';
#if defined(HAVE_OPEN_MEMSTREAM)
if ((in = fmemopen(src, srclen, "r")) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to fmemopen().\n");
return FALSE;
}
outsize = 0;
if ((out = open_memstream(&outptr, &outsize)) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n");
fclose(in);
return FALSE;
}
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(in);
fclose(out);
return FALSE;
}
#else
if ((in = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
return FALSE;
}
if (fwrite(src, 1, srclen, in) != srclen)
{
fclose(in);
return FALSE;
}
if (fseek(in, 0, SEEK_SET) != 0)
{
fclose(in);
return FALSE;
}
if ((out = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
fclose(in);
return FALSE;
}
#endif
scan_line_out = NULL;
if (setjmp(escape.escape))
{
if (escape.error_message[0])
span_log(logging, SPAN_LOG_FLOW, "%s\n", escape.error_message);
else
span_log(logging, SPAN_LOG_FLOW, "Unspecified libjpeg error.\n");
if (scan_line_out)
free(scan_line_out);
fclose(in);
fclose(out);
return FALSE;
}
/* Create input decompressor. */
decompressor.err = jpeg_std_error(&error_handler);
decompressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_decompress(&decompressor);
jpeg_stdio_src(&decompressor, in);
/* Needed in the case of ITU Lab input */
for (m = 0; m < 16; m++)
jpeg_save_markers(&decompressor, JPEG_APP0 + m, 0xFFFF);
/* Rewind the file */
if (fseek(in, 0, SEEK_SET) != 0)
return FALSE;
/* Take the header */
jpeg_read_header(&decompressor, TRUE);
/* Now we can force the input colour space. For ITULab, we use YCbCr as a "don't touch" marker */
decompressor.out_color_space = JCS_YCbCr;
/* Sanity check and parameter check */
if (!is_itu_fax(logging, s, decompressor.marker_list))
{
span_log(logging, SPAN_LOG_FLOW, "Is not an ITU FAX.\n");
return FALSE;
}
/* Create compressor */
compressor.err = jpeg_std_error(&error_handler);
compressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_compress(&compressor);
jpeg_stdio_dest(&compressor, out);
/* Force the destination colour space */
compressor.in_color_space = JCS_RGB;
compressor.input_components = 3;
jpeg_set_defaults(&compressor);
/* Limit to baseline-JPEG values */
//jpeg_set_quality(&compressor, quality, TRUE);
/* Copy size, resolution, etc */
jpeg_copy_critical_parameters(&decompressor, &compressor);
/* We need to keep these */
compressor.density_unit = decompressor.density_unit;
compressor.X_density = decompressor.X_density;
compressor.Y_density = decompressor.Y_density;
jpeg_start_decompress(&decompressor);
jpeg_start_compress(&compressor, TRUE);
if ((scan_line_in = (JSAMPROW) malloc(decompressor.output_width*decompressor.num_components)) == NULL)
return FALSE;
if ((scan_line_out = (JSAMPROW) malloc(compressor.image_width*compressor.num_components)) == NULL)
{
free(scan_line_in);
return FALSE;
}
while (decompressor.output_scanline < decompressor.output_height)
{
jpeg_read_scanlines(&decompressor, &scan_line_in, 1);
lab_to_srgb(s, scan_line_out, scan_line_in, decompressor.output_width);
jpeg_write_scanlines(&compressor, &scan_line_out, 1);
}
free(scan_line_in);
free(scan_line_out);
jpeg_finish_decompress(&decompressor);
jpeg_finish_compress(&compressor);
jpeg_destroy_decompress(&decompressor);
jpeg_destroy_compress(&compressor);
fclose(in);
#if defined(HAVE_OPEN_MEMSTREAM)
fclose(out);
*dst = outptr;
*dstlen = outsize;
#else
*dstlen = ftell(out);
*dst = malloc(*dstlen);
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
if (fread(*dst, 1, *dstlen, out) != *dstlen)
{
free(*dst);
fclose(out);
return FALSE;
}
fclose(out);
#endif
return TRUE;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_jpeg_to_itulab(logging_state_t *logging, lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen)
{
struct jpeg_decompress_struct decompressor;
struct jpeg_compress_struct compressor;
FILE *in;
FILE *out;
int m;
JSAMPROW scan_line_in;
JSAMPROW scan_line_out;
escape_route_t escape;
#if defined(HAVE_OPEN_MEMSTREAM)
char *outptr;
size_t outsize;
#endif
escape.error_message[0] = '\0';
#if defined(HAVE_OPEN_MEMSTREAM)
if ((in = fmemopen(src, srclen, "r")) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to fmemopen().\n");
return FALSE;
}
outsize = 0;
if ((out = open_memstream(&outptr, &outsize)) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n");
fclose(in);
return FALSE;
}
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(in);
fclose(out);
return FALSE;
}
#else
if ((in = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
return FALSE;
}
if (fwrite(src, 1, srclen, in) != srclen)
{
fclose(in);
return FALSE;
}
if (fseek(in, 0, SEEK_SET) != 0)
{
fclose(in);
return FALSE;
}
if ((out = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
fclose(in);
return FALSE;
}
#endif
scan_line_out = NULL;
if (setjmp(escape.escape))
{
if (escape.error_message[0])
span_log(logging, SPAN_LOG_FLOW, "%s\n", escape.error_message);
else
span_log(logging, SPAN_LOG_FLOW, "Unspecified libjpeg error.\n");
if (scan_line_out)
free(scan_line_out);
fclose(in);
fclose(out);
return FALSE;
}
/* Create input decompressor. */
decompressor.err = jpeg_std_error(&error_handler);
decompressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_decompress(&decompressor);
jpeg_stdio_src(&decompressor, in);
/* Needed in the case of ITU Lab input */
for (m = 0; m < 16; m++)
jpeg_save_markers(&decompressor, JPEG_APP0 + m, 0xFFFF);
/* Rewind the file */
if (fseek(in, 0, SEEK_SET) != 0)
return FALSE;
/* Take the header */
jpeg_read_header(&decompressor, TRUE);
/* Now we can force the input colour space. For ITULab, we use YCbCr as a "don't touch" marker */
decompressor.out_color_space = JCS_RGB;
compressor.err = jpeg_std_error(&error_handler);
compressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_compress(&compressor);
jpeg_stdio_dest(&compressor, out);
/* Force the destination colour space */
compressor.in_color_space = JCS_YCbCr;
compressor.input_components = 3;
jpeg_set_defaults(&compressor);
/* Limit to baseline-JPEG values */
//jpeg_set_quality(&compressor, quality, TRUE);
jpeg_copy_critical_parameters(&decompressor, &compressor);
/* We need to keep these */
compressor.density_unit = decompressor.density_unit;
compressor.X_density = decompressor.X_density;
compressor.Y_density = decompressor.Y_density;
jpeg_start_decompress(&decompressor);
jpeg_start_compress(&compressor, TRUE);
set_itu_fax(&compressor);
if ((scan_line_in = (JSAMPROW) malloc(decompressor.output_width*decompressor.num_components)) == NULL)
return FALSE;
if ((scan_line_out = (JSAMPROW) malloc(compressor.image_width*compressor.num_components)) == NULL)
{
free(scan_line_in);
return FALSE;
}
while (decompressor.output_scanline < decompressor.output_height)
{
jpeg_read_scanlines(&decompressor, &scan_line_in, 1);
srgb_to_lab(s, scan_line_out, scan_line_in, decompressor.output_width);
jpeg_write_scanlines(&compressor, &scan_line_out, 1);
}
free(scan_line_in);
free(scan_line_out);
jpeg_finish_decompress(&decompressor);
jpeg_finish_compress(&compressor);
jpeg_destroy_decompress(&decompressor);
jpeg_destroy_compress(&compressor);
fclose(in);
#if defined(HAVE_OPEN_MEMSTREAM)
fclose(out);
*dst = outptr;
*dstlen = outsize;
#else
*dstlen = ftell(out);
*dst = malloc(*dstlen);
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
if (fread(*dst, 1, *dstlen, out) != *dstlen)
{
free(*dst);
fclose(out);
return FALSE;
}
fclose(out);
#endif
return TRUE;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_srgb_to_itulab(logging_state_t *logging, lab_params_t *s, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t width, uint32_t height)
{
struct jpeg_compress_struct compressor;
FILE *out;
JSAMPROW scan_line_out;
JSAMPROW scan_line_in;
tsize_t pos;
escape_route_t escape;
#if defined(HAVE_OPEN_MEMSTREAM)
char *outptr;
size_t outsize;
#endif
escape.error_message[0] = '\0';
#if defined(HAVE_OPEN_MEMSTREAM)
outsize = 0;
if ((out = open_memstream(&outptr, &outsize)) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n");
return FALSE;
}
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
#else
if ((out = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
return FALSE;
}
#endif
scan_line_out = NULL;
if (setjmp(escape.escape))
{
if (escape.error_message[0])
span_log(logging, SPAN_LOG_FLOW, "%s\n", escape.error_message);
else
span_log(logging, SPAN_LOG_FLOW, "Unspecified libjpeg error.\n");
if (scan_line_out)
free(scan_line_out);
fclose(out);
return FALSE;
}
compressor.err = jpeg_std_error(&error_handler);
compressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_compress(&compressor);
jpeg_stdio_dest(&compressor, out);
/* Force the destination colour space */
compressor.in_color_space = JCS_YCbCr;
compressor.input_components = 3;
jpeg_set_defaults(&compressor);
/* Limit to baseline-JPEG values */
//jpeg_set_quality(&compressor, quality, TRUE);
/* Size, resolution, etc */
compressor.image_width = width;
compressor.image_height = height;
jpeg_start_compress(&compressor, TRUE);
set_itu_fax(&compressor);
if ((scan_line_out = (JSAMPROW) malloc(compressor.image_width*compressor.num_components)) == NULL)
return FALSE;
for (pos = 0; pos < srclen; pos += compressor.image_width*compressor.num_components)
{
scan_line_in = (JSAMPROW) src + pos;
srgb_to_lab(s, scan_line_out, scan_line_in, compressor.image_width);
jpeg_write_scanlines(&compressor, &scan_line_out, 1);
}
free(scan_line_out);
jpeg_finish_compress(&compressor);
jpeg_destroy_compress(&compressor);
#if defined(HAVE_OPEN_MEMSTREAM)
fclose(out);
*dst = outptr;
*dstlen = outsize;
#else
*dstlen = ftell(out);
*dst = malloc(*dstlen);
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
if (fread(*dst, 1, *dstlen, out) != *dstlen)
{
free(*dst);
fclose(out);
return FALSE;
}
fclose(out);
#endif
return TRUE;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_itulab_to_itulab(logging_state_t *logging, tdata_t *dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t width, uint32_t height)
{
struct jpeg_compress_struct compressor;
FILE *out;
JSAMPROW scan_line_in;
tsize_t pos;
escape_route_t escape;
#if defined(HAVE_OPEN_MEMSTREAM)
char *outptr;
size_t outsize;
#endif
escape.error_message[0] = '\0';
#if defined(HAVE_OPEN_MEMSTREAM)
outsize = 0;
if ((out = open_memstream(&outptr, &outsize)) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to open_memstream().\n");
return FALSE;
}
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
#else
if ((out = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
return FALSE;
}
#endif
if (setjmp(escape.escape))
{
if (escape.error_message[0])
span_log(logging, SPAN_LOG_FLOW, "%s\n", escape.error_message);
else
span_log(logging, SPAN_LOG_FLOW, "Unspecified libjpeg error.\n");
fclose(out);
return FALSE;
}
compressor.err = jpeg_std_error(&error_handler);
compressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_compress(&compressor);
jpeg_stdio_dest(&compressor, out);
/* Force the destination colour space */
compressor.in_color_space = JCS_YCbCr;
compressor.input_components = 3;
jpeg_set_defaults(&compressor);
/* Limit to baseline-JPEG values */
//jpeg_set_quality(&compressor, quality, TRUE);
/* Size, resolution, etc */
compressor.image_width = width;
compressor.image_height = height;
jpeg_start_compress(&compressor, TRUE);
set_itu_fax(&compressor);
for (pos = 0; pos < srclen; pos += compressor.image_width*compressor.num_components)
{
scan_line_in = (JSAMPROW) src + pos;
jpeg_write_scanlines(&compressor, &scan_line_in, 1);
}
jpeg_finish_compress(&compressor);
jpeg_destroy_compress(&compressor);
#if defined(HAVE_OPEN_MEMSTREAM)
fclose(out);
*dst = outptr;
*dstlen = outsize;
#else
*dstlen = ftell(out);
*dst = malloc(*dstlen);
if (fseek(out, 0, SEEK_SET) != 0)
{
fclose(out);
return FALSE;
}
if (fread(*dst, 1, *dstlen, out) != *dstlen)
{
free(*dst);
fclose(out);
return FALSE;
}
fclose(out);
#endif
return TRUE;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_itulab_to_srgb(logging_state_t *logging, lab_params_t *s, tdata_t dst, tsize_t *dstlen, tdata_t src, tsize_t srclen, uint32_t *width, uint32_t *height)
{
struct jpeg_decompress_struct decompressor;
JSAMPROW scan_line_out;
JSAMPROW scan_line_in;
tsize_t pos;
FILE *in;
int m;
escape_route_t escape;
escape.error_message[0] = '\0';
#if defined(HAVE_OPEN_MEMSTREAM)
if ((in = fmemopen(src, srclen, "r")) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to fmemopen().\n");
return FALSE;
}
#else
if ((in = tmpfile()) == NULL)
{
span_log(logging, SPAN_LOG_FLOW, "Failed to tmpfile().\n");
return FALSE;
}
if (fwrite(src, 1, srclen, in) != srclen)
{
fclose(in);
return FALSE;
}
if (fseek(in, 0, SEEK_SET) != 0)
{
fclose(in);
return FALSE;
}
#endif
scan_line_out = NULL;
if (setjmp(escape.escape))
{
if (escape.error_message[0])
span_log(logging, SPAN_LOG_FLOW, "%s\n", escape.error_message);
else
span_log(logging, SPAN_LOG_FLOW, "Unspecified libjpeg error.\n");
if (scan_line_out)
free(scan_line_out);
fclose(in);
return FALSE;
}
/* Create input decompressor. */
decompressor.err = jpeg_std_error(&error_handler);
decompressor.client_data = (void *) &escape;
error_handler.error_exit = jpg_error_exit;
error_handler.output_message = jpg_error_exit;
jpeg_create_decompress(&decompressor);
jpeg_stdio_src(&decompressor, in);
/* Needed in the case of ITU Lab input */
for (m = 0; m < 16; m++)
jpeg_save_markers(&decompressor, JPEG_APP0 + m, 0xFFFF);
/* Rewind the file */
if (fseek(in, 0, SEEK_SET) != 0)
return FALSE;
/* Take the header */
jpeg_read_header(&decompressor, FALSE);
/* Now we can force the input colour space. For ITULab, we use YCbCr as a "don't touch" marker */
decompressor.out_color_space = JCS_YCbCr;
/* Sanity check and parameter check */
if (!is_itu_fax(logging, s, decompressor.marker_list))
{
span_log(logging, SPAN_LOG_FLOW, "Is not an ITU FAX.\n");
return FALSE;
}
/* Copy size, resolution, etc */
*width = decompressor.image_width;
*height = decompressor.image_height;
jpeg_start_decompress(&decompressor);
if ((scan_line_in = (JSAMPROW) malloc(decompressor.output_width*decompressor.num_components)) == NULL)
return FALSE;
for (pos = 0; decompressor.output_scanline < decompressor.output_height; pos += decompressor.output_width*decompressor.num_components)
{
scan_line_out = (JSAMPROW) dst + pos;
jpeg_read_scanlines(&decompressor, &scan_line_in, 1);
lab_to_srgb(s, scan_line_out, scan_line_in, decompressor.output_width);
}
free(scan_line_in);
jpeg_finish_decompress(&decompressor);
jpeg_destroy_decompress(&decompressor);
fclose(in);
*dstlen = pos;
return TRUE;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) t42_encode_set_options(t42_encode_state_t *s,
uint32_t l0,
int mx,
int options)
{
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_set_image_width(t42_encode_state_t *s, uint32_t image_width)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_set_image_length(t42_encode_state_t *s, uint32_t length)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) t42_encode_abort(t42_encode_state_t *s)
{
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) t42_encode_comment(t42_encode_state_t *s, const uint8_t comment[], size_t len)
{
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_image_complete(t42_encode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_get(t42_encode_state_t *s, uint8_t buf[], size_t max_len)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(uint32_t) t42_encode_get_image_width(t42_encode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(uint32_t) t42_encode_get_image_length(t42_encode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_get_compressed_image_size(t42_encode_state_t *s)
{
return s->compressed_image_size;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_set_row_read_handler(t42_encode_state_t *s,
t4_row_read_handler_t handler,
void *user_data)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(logging_state_t *) t42_encode_get_logging_state(t42_encode_state_t *s)
{
return &s->logging;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_restart(t42_encode_state_t *s, uint32_t image_width, uint32_t image_length)
{
//s->image_width = image_width;
//s->image_length = image_length;
s->compressed_image_size = 0;
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(t42_encode_state_t *) t42_encode_init(t42_encode_state_t *s,
uint32_t image_width,
uint32_t image_length,
t4_row_read_handler_t handler,
void *user_data)
{
if (s == NULL)
{
if ((s = (t42_encode_state_t *) malloc(sizeof(*s))) == NULL)
return NULL;
}
memset(s, 0, sizeof(*s));
span_log_init(&s->logging, SPAN_LOG_NONE, NULL);
span_log_set_protocol(&s->logging, "T.42");
s->row_read_handler = handler;
s->row_read_user_data = user_data;
t42_encode_restart(s, image_width, image_length);
return s;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_release(t42_encode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_encode_free(t42_encode_state_t *s)
{
int ret;
ret = t42_encode_release(s);
free(s);
return ret;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(void) t42_decode_rx_status(t42_decode_state_t *s, int status)
{
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_put(t42_decode_state_t *s, const uint8_t data[], size_t len)
{
uint8_t *buf;
if (s->compressed_image_size + len > s->buf_size)
{
if ((buf = (uint8_t *) realloc(s->compressed_buf, s->compressed_image_size + 1000)) == NULL)
return -1;
s->buf_size = s->compressed_image_size + 1000;
s->compressed_buf = buf;
}
memcpy(&s->compressed_buf[s->compressed_image_size], data, len);
s->compressed_image_size += len;
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_set_row_write_handler(t42_decode_state_t *s,
t4_row_write_handler_t handler,
void *user_data)
{
s->row_write_handler = handler;
s->row_write_user_data = user_data;
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_set_comment_handler(t42_decode_state_t *s,
uint32_t max_comment_len,
t4_row_write_handler_t handler,
void *user_data)
{
s->max_comment_len = max_comment_len;
s->comment_handler = handler;
s->comment_user_data = user_data;
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_set_image_size_constraints(t42_decode_state_t *s,
uint32_t max_xd,
uint32_t max_yd)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(uint32_t) t42_decode_get_image_width(t42_decode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(uint32_t) t42_decode_get_image_length(t42_decode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_get_compressed_image_size(t42_decode_state_t *s)
{
return s->compressed_image_size;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_new_plane(t42_decode_state_t *s)
{
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(logging_state_t *) t42_decode_get_logging_state(t42_decode_state_t *s)
{
return &s->logging;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_restart(t42_decode_state_t *s)
{
s->compressed_image_size = 0;
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(t42_decode_state_t *) t42_decode_init(t42_decode_state_t *s,
t4_row_write_handler_t handler,
void *user_data)
{
if (s == NULL)
{
if ((s = (t42_decode_state_t *) malloc(sizeof(*s))) == NULL)
return NULL;
}
memset(s, 0, sizeof(*s));
span_log_init(&s->logging, SPAN_LOG_NONE, NULL);
span_log_set_protocol(&s->logging, "T.42");
s->row_write_handler = handler;
s->row_write_user_data = user_data;
s->buf_size = 0;
s->compressed_buf = NULL;
t42_decode_restart(s);
return s;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_release(t42_decode_state_t *s)
{
if (s->comment)
{
free(s->comment);
s->comment = NULL;
}
return 0;
}
/*- End of function --------------------------------------------------------*/
SPAN_DECLARE(int) t42_decode_free(t42_decode_state_t *s)
{
int ret;
ret = t42_decode_release(s);
free(s);
return ret;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/
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