/src/ghostpdl/base/sdcte.c

Source (jump to first uncovered line)
/* Copyright (C) 2001-2021 Artifex Software, Inc.
   All Rights Reserved.

   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied,
   modified or distributed except as expressly authorized under the terms
   of the license contained in the file LICENSE in this distribution.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
*/


/* DCT encoding filter stream */
#include "memory_.h"
#include "stdio_.h"
#include "jpeglib_.h"
#include "jerror_.h"
#include "gdebug.h"
#include "gsmemory.h"
#include "strimpl.h"
#include "sdct.h"
#include "sjpeg.h"

#define ICC_OVERHEAD  16
#define MAX_MARKER_DATA_SIZE  (65535 - ICC_OVERHEAD)

public_st_jpeg_compress_data();

/* ------ DCTEncode ------ */

/* JPEG destination manager procedures */
static void
dcte_init_destination(j_compress_ptr cinfo)
{
}
static boolean
dcte_empty_output_buffer(j_compress_ptr cinfo)
{
    return FALSE;
}
static void
dcte_term_destination(j_compress_ptr cinfo)
{
}

/* Set the defaults for the DCTEncode filter. */
static void
s_DCTE_set_defaults(stream_state * st)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;

    s_DCT_set_defaults(st);
    ss->QFactor = 1.0;
    ss->ColorTransform = -1;
    ss->Markers.data = 0;
    ss->Markers.size = 0;
    ss->NoMarker = true;
}

/* Initialize DCTEncode filter */
static int
s_DCTE_init(stream_state * st)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;
    struct jpeg_destination_mgr *dest = &ss->data.compress->destination;

    dest->init_destination = dcte_init_destination;
    dest->empty_output_buffer = dcte_empty_output_buffer;
    dest->term_destination = dcte_term_destination;
    ss->data.common->memory = ss->jpeg_memory;
    ss->data.compress->cinfo.dest = dest;
    ss->phase = 0;
    ss->icc_marker = 0;
    ss->icc_position = -1;
    return 0;
}

/* Process a buffer */
static int
s_DCTE_process(stream_state * st, stream_cursor_read * pr,
               stream_cursor_write * pw, bool last)
{
    stream_DCT_state *const ss = (stream_DCT_state *) st;
    jpeg_compress_data *jcdp = ss->data.compress;
    struct jpeg_destination_mgr *dest = jcdp->cinfo.dest;

    if_debug2m('w', st->memory, "[wde]process avail=%u, last=%d\n",
               (uint) (pr->limit - pr->ptr), last);
    dest->next_output_byte = pw->ptr + 1;
    dest->free_in_buffer = pw->limit - pw->ptr;
    switch (ss->phase) {
        case 0:   /* not initialized yet */
            if (gs_jpeg_start_compress(ss, TRUE) < 0)
                return ERRC;
            if_debug4m('w', st->memory, "[wde]width=%u, height=%u, components=%d, scan_line_size=%u\n",
                       jcdp->cinfo.image_width,
                       jcdp->cinfo.image_height,
                       jcdp->cinfo.input_components,
                       ss->scan_line_size);
            pw->ptr = dest->next_output_byte - 1;
            ss->phase = 1;
            /* falls through */
        case 1:   /* initialized, Markers not written */
            if (pw->limit - pw->ptr < ss->Markers.size)
                return 1;
            memcpy(pw->ptr + 1, ss->Markers.data, ss->Markers.size);
            pw->ptr += ss->Markers.size;
            ss->phase = 2;
            /* falls through */
        case 2:   /* still need to write Adobe marker */
            if (!ss->NoMarker) {
                static const byte Adobe[] =
                {
                    0xFF, JPEG_APP0 + 14, 0, 14, /* parameter length */
                    'A', 'd', 'o', 'b', 'e',
                    0, 100, /* Version */
                    0, 0, /* Flags0 */
                    0, 0, /* Flags1 */
                    0   /* ColorTransform */
                };

#define ADOBE_MARKER_LEN sizeof(Adobe)
                if (pw->limit - pw->ptr < ADOBE_MARKER_LEN)
                    return 1;
                memcpy(pw->ptr + 1, Adobe, ADOBE_MARKER_LEN);
                pw->ptr += ADOBE_MARKER_LEN;
                *pw->ptr = ss->ColorTransform;
#undef ADOBE_MARKER_LEN
            }
            dest->next_output_byte = pw->ptr + 1;
            dest->free_in_buffer = pw->limit - pw->ptr;
            ss->phase = 3;
            /* falls through */
        case  3:
            /* If we have it, then write out the ICC profile */
            /* Due to size limitations allowed in APP0 markers, the profile
               may have to be written in mutiple markers */
          if (ss->icc_profile != NULL) {
            static const char marker[2] = {0xFF, 0xE2};  /* JPEG_APP0 + 2 */
                byte num_mark;

                /* Number of markers */
                num_mark = ss->icc_profile->buffer_size / MAX_MARKER_DATA_SIZE;
                if (num_mark * MAX_MARKER_DATA_SIZE < ss->icc_profile->buffer_size) {
                    num_mark++;
                }
            while (ss->icc_marker < num_mark) {
                ulong offset = ss->icc_marker * MAX_MARKER_DATA_SIZE;
                ulong size;

                    size = ss->icc_profile->buffer_size - offset;
                    if (size > MAX_MARKER_DATA_SIZE)
                      size = MAX_MARKER_DATA_SIZE;

                    /* In this case we are just getting started with the
                       header of the marker.  Write that portion out */
                if (ss->icc_position == -1) {
                  byte length_byte[2];
                  byte curr_mark = ss->icc_marker + 1;
                  ulong total_length;

                  if ((uint) (pw->limit - pw->ptr) < (sizeof(marker) + ICC_OVERHEAD))
                        return 1;
                  total_length = size + ICC_OVERHEAD;
                  memcpy(pw->ptr + 1, marker, sizeof(marker));
                  length_byte[0] = total_length >> 8;
                  length_byte[1] = total_length & 0xFF;
                  memcpy(pw->ptr + 3, length_byte, sizeof(length_byte));
                  memcpy(pw->ptr + 5, "ICC_PROFILE", 12); /* Null included */
                  memcpy(pw->ptr + 17, &curr_mark, 1);
                  memcpy(pw->ptr + 18, &num_mark, 1);
                  pw->ptr += sizeof(marker) + ICC_OVERHEAD;
                  ss->icc_position = 0;
                }
                    /* Now write out the actual profile data */
                while (ss->icc_position < size) {
                  ulong avail_bytes, num_bytes;

                  avail_bytes = (ulong) (pw->limit - pw->ptr);
                  if (avail_bytes == 0)
                      return 1;
                  num_bytes = (size - ss->icc_position);
                  if (num_bytes > avail_bytes)
                      num_bytes = avail_bytes;
                  memcpy(pw->ptr + 1,  ss->icc_profile->buffer + offset + ss->icc_position, num_bytes);
                  ss->icc_position += num_bytes;
                  pw->ptr += num_bytes;
                }
                    /* Move on to the next marker */
                ++ss->icc_marker;
                ss->icc_position = -1;
            }
              dest->next_output_byte = pw->ptr + 1;
              dest->free_in_buffer = pw->limit - pw->ptr;
          }
          ss->phase = 4;
          /* falls through */
        case 4:   /* markers written, processing data */
            while (jcdp->cinfo.image_height > jcdp->cinfo.next_scanline) {
                int written;

                /*
                 * The data argument for jpeg_write_scanlines is
                 * declared as a JSAMPARRAY.  There is no corresponding
                 * const type, so we must remove const from the
                 * argument that we are passing here.  (Tom Lane of IJG
                 * judges that providing const analogues of the
                 * interface types wouldn't be worth the trouble.)
                 */
                /*const */ byte *samples = (byte *) (pr->ptr + 1);

                if_debug1m('w', st->memory, "[wde]next_scanline=%u\n",
                           jcdp->cinfo.next_scanline);
                if ((uint) (pr->limit - pr->ptr) < ss->scan_line_size) {
                    if (last)
                        return ERRC;  /* premature EOD */
                    return 0; /* need more data */
                }
                written = gs_jpeg_write_scanlines(ss, &samples, 1);
                if (written < 0)
                    return ERRC;
                if_debug3m('w', st->memory, "[wde]write returns %d, used=%u, written=%u\n",
                           written,
                           (uint) (samples - 1 - pr->ptr),
                           (uint) (dest->next_output_byte - 1 - pw->ptr));
                pw->ptr = dest->next_output_byte - 1;
                if (!written)
                    return 1;  /* output full */
                pr->ptr += ss->scan_line_size;
            }
            ss->phase = 5;
            /* falls through */
        case 5:   /* all data processed, finishing */
            /* jpeg_finish_compress can't suspend, so write its output
             * to a fixed-size internal buffer.
             */
            dest->next_output_byte = jcdp->finish_compress_buf;
            dest->free_in_buffer = sizeof(jcdp->finish_compress_buf);
            if (gs_jpeg_finish_compress(ss) < 0)
                return ERRC;
            jcdp->fcb_size =
                dest->next_output_byte - jcdp->finish_compress_buf;
            jcdp->fcb_pos = 0;
            ss->phase = 6;
            /* falls through */
        case 6:   /* copy the final data to the output */
            if (jcdp->fcb_pos < jcdp->fcb_size) {
                int count = min(jcdp->fcb_size - jcdp->fcb_pos,
                                pw->limit - pw->ptr);

                if_debug1m('w', st->memory, "[wde]copying final %d\n", count);
                memcpy(pw->ptr + 1, jcdp->finish_compress_buf + jcdp->fcb_pos,
                       count);
                jcdp->fcb_pos += count;
                pw->ptr += count;
                if (jcdp->fcb_pos < jcdp->fcb_size)
                    return 1;
            }
            return EOFC;
    }
    /* Default case can't happen.... */
    return ERRC;
}

/* Stream template */
const stream_template s_DCTE_template =
{&st_DCT_state, s_DCTE_init, s_DCTE_process, 1000, 4000, NULL,
 s_DCTE_set_defaults
};

Coverage Report

Created: 2022-10-31 07:00

Line	Count	Source (jump to first uncovered line)
1		/* Copyright (C) 2001-2021 Artifex Software, Inc.
2		All Rights Reserved.
3
4		This software is provided AS-IS with no warranty, either express or
5		implied.
6
7		This software is distributed under license and may not be copied,
8		modified or distributed except as expressly authorized under the terms
9		of the license contained in the file LICENSE in this distribution.
10
11		Refer to licensing information at http://www.artifex.com or contact
12		Artifex Software, Inc., 1305 Grant Avenue - Suite 200, Novato,
13		CA 94945, U.S.A., +1(415)492-9861, for further information.
14		*/
15
16
17		/* DCT encoding filter stream */
18		#include "memory_.h"
19		#include "stdio_.h"
20		#include "jpeglib_.h"
21		#include "jerror_.h"
22		#include "gdebug.h"
23		#include "gsmemory.h"
24		#include "strimpl.h"
25		#include "sdct.h"
26		#include "sjpeg.h"
27
28	0	#define ICC_OVERHEAD 16
29	0	#define MAX_MARKER_DATA_SIZE (65535 - ICC_OVERHEAD)
30
31		public_st_jpeg_compress_data();
32
33		/* ------ DCTEncode ------ */
34
35		/* JPEG destination manager procedures */
36		static void
37		dcte_init_destination(j_compress_ptr cinfo)
38	877	{
39	877	}
40		static boolean
41		dcte_empty_output_buffer(j_compress_ptr cinfo)
42	2.66k	{
43	2.66k	return FALSE;
44	2.66k	}
45		static void
46		dcte_term_destination(j_compress_ptr cinfo)
47	867	{
48	867	}
49
50		/* Set the defaults for the DCTEncode filter. */
51		static void
52		s_DCTE_set_defaults(stream_state * st)
53	378k	{
54	378k	stream_DCT_state const ss = (stream_DCT_state ) st;
55
56	378k	s_DCT_set_defaults(st);
57	378k	ss->QFactor = 1.0;
58	378k	ss->ColorTransform = -1;
59	378k	ss->Markers.data = 0;
60	378k	ss->Markers.size = 0;
61	378k	ss->NoMarker = true;
62	378k	}
63
64		/* Initialize DCTEncode filter */
65		static int
66		s_DCTE_init(stream_state * st)
67	877	{
68	877	stream_DCT_state const ss = (stream_DCT_state ) st;
69	877	struct jpeg_destination_mgr *dest = &ss->data.compress->destination;
70
71	877	dest->init_destination = dcte_init_destination;
72	877	dest->empty_output_buffer = dcte_empty_output_buffer;
73	877	dest->term_destination = dcte_term_destination;
74	877	ss->data.common->memory = ss->jpeg_memory;
75	877	ss->data.compress->cinfo.dest = dest;
76	877	ss->phase = 0;
77	877	ss->icc_marker = 0;
78	877	ss->icc_position = -1;
79	877	return 0;
80	877	}
81
82		/* Process a buffer */
83		static int
84		s_DCTE_process(stream_state * st, stream_cursor_read * pr,
85		stream_cursor_write * pw, bool last)
86	68.3k	{
87	68.3k	stream_DCT_state const ss = (stream_DCT_state ) st;
88	68.3k	jpeg_compress_data *jcdp = ss->data.compress;
89	68.3k	struct jpeg_destination_mgr *dest = jcdp->cinfo.dest;
90
91	68.3k	if_debug2m('w', st->memory, "[wde]process avail=%u, last=%d\n",
92	68.3k	(uint) (pr->limit - pr->ptr), last);
93	68.3k	dest->next_output_byte = pw->ptr + 1;
94	68.3k	dest->free_in_buffer = pw->limit - pw->ptr;
95	68.3k	switch (ss->phase) {
96	877	case 0: /* not initialized yet */
97	877	if (gs_jpeg_start_compress(ss, TRUE) < 0)
98	0	return ERRC;
99	877	if_debug4m('w', st->memory, "[wde]width=%u, height=%u, components=%d, scan_line_size=%u\n",
100	877	jcdp->cinfo.image_width,
101	877	jcdp->cinfo.image_height,
102	877	jcdp->cinfo.input_components,
103	877	ss->scan_line_size);
104	877	pw->ptr = dest->next_output_byte - 1;
105	877	ss->phase = 1;
106		/* falls through */
107	877	case 1: /* initialized, Markers not written */
108	877	if (pw->limit - pw->ptr < ss->Markers.size)
109	0	return 1;
110	877	memcpy(pw->ptr + 1, ss->Markers.data, ss->Markers.size);
111	877	pw->ptr += ss->Markers.size;
112	877	ss->phase = 2;
113		/* falls through */
114	877	case 2: /* still need to write Adobe marker */
115	877	if (!ss->NoMarker) {
116	877	static const byte Adobe[] =
117	877	{
118	877	0xFF, JPEG_APP0 + 14, 0, 14, /* parameter length */
119	877	'A', 'd', 'o', 'b', 'e',
120	877	0, 100, /* Version */
121	877	0, 0, /* Flags0 */
122	877	0, 0, /* Flags1 */
123	877	0 /* ColorTransform */
124	877	};
125
126	2.63k	#define ADOBE_MARKER_LEN sizeof(Adobe)
127	877	if (pw->limit - pw->ptr < ADOBE_MARKER_LEN)
128	0	return 1;
129	877	memcpy(pw->ptr + 1, Adobe, ADOBE_MARKER_LEN);
130	877	pw->ptr += ADOBE_MARKER_LEN;
131	877	*pw->ptr = ss->ColorTransform;
132	877	#undef ADOBE_MARKER_LEN
133	877	}
134	877	dest->next_output_byte = pw->ptr + 1;
135	877	dest->free_in_buffer = pw->limit - pw->ptr;
136	877	ss->phase = 3;
137		/* falls through */
138	877	case 3:
139		/* If we have it, then write out the ICC profile */
140		/* Due to size limitations allowed in APP0 markers, the profile
141		may have to be written in mutiple markers */
142	877	if (ss->icc_profile != NULL) {
143	0	static const char marker[2] = {0xFF, 0xE2}; /* JPEG_APP0 + 2 */
144	0	byte num_mark;
145
146		/* Number of markers */
147	0	num_mark = ss->icc_profile->buffer_size / MAX_MARKER_DATA_SIZE;
148	0	if (num_mark * MAX_MARKER_DATA_SIZE < ss->icc_profile->buffer_size) {
149	0	num_mark++;
150	0	}
151	0	while (ss->icc_marker < num_mark) {
152	0	ulong offset = ss->icc_marker * MAX_MARKER_DATA_SIZE;
153	0	ulong size;
154
155	0	size = ss->icc_profile->buffer_size - offset;
156	0	if (size > MAX_MARKER_DATA_SIZE)
157	0	size = MAX_MARKER_DATA_SIZE;
158
159		/* In this case we are just getting started with the
160		header of the marker. Write that portion out */
161	0	if (ss->icc_position == -1) {
162	0	byte length_byte[2];
163	0	byte curr_mark = ss->icc_marker + 1;
164	0	ulong total_length;
165
166	0	if ((uint) (pw->limit - pw->ptr) < (sizeof(marker) + ICC_OVERHEAD))
167	0	return 1;
168	0	total_length = size + ICC_OVERHEAD;
169	0	memcpy(pw->ptr + 1, marker, sizeof(marker));
170	0	length_byte[0] = total_length >> 8;
171	0	length_byte[1] = total_length & 0xFF;
172	0	memcpy(pw->ptr + 3, length_byte, sizeof(length_byte));
173	0	memcpy(pw->ptr + 5, "ICC_PROFILE", 12); /* Null included */
174	0	memcpy(pw->ptr + 17, &curr_mark, 1);
175	0	memcpy(pw->ptr + 18, &num_mark, 1);
176	0	pw->ptr += sizeof(marker) + ICC_OVERHEAD;
177	0	ss->icc_position = 0;
178	0	}
179		/* Now write out the actual profile data */
180	0	while (ss->icc_position < size) {
181	0	ulong avail_bytes, num_bytes;
182
183	0	avail_bytes = (ulong) (pw->limit - pw->ptr);
184	0	if (avail_bytes == 0)
185	0	return 1;
186	0	num_bytes = (size - ss->icc_position);
187	0	if (num_bytes > avail_bytes)
188	0	num_bytes = avail_bytes;
189	0	memcpy(pw->ptr + 1, ss->icc_profile->buffer + offset + ss->icc_position, num_bytes);
190	0	ss->icc_position += num_bytes;
191	0	pw->ptr += num_bytes;
192	0	}
193		/* Move on to the next marker */
194	0	++ss->icc_marker;
195	0	ss->icc_position = -1;
196	0	}
197	0	dest->next_output_byte = pw->ptr + 1;
198	0	dest->free_in_buffer = pw->limit - pw->ptr;
199	0	}
200	877	ss->phase = 4;
201		/* falls through */
202	68.3k	case 4: /* markers written, processing data */
203	208k	while (jcdp->cinfo.image_height > jcdp->cinfo.next_scanline) {
204	207k	int written;
205
206		/*
207		* The data argument for jpeg_write_scanlines is
208		* declared as a JSAMPARRAY. There is no corresponding
209		* const type, so we must remove const from the
210		* argument that we are passing here. (Tom Lane of IJG
211		* judges that providing const analogues of the
212		* interface types wouldn't be worth the trouble.)
213		*/
214	207k	/const / byte samples = (byte ) (pr->ptr + 1);
215
216	207k	if_debug1m('w', st->memory, "[wde]next_scanline=%u\n",
217	207k	jcdp->cinfo.next_scanline);
218	207k	if ((uint) (pr->limit - pr->ptr) < ss->scan_line_size) {
219	64.8k	if (last)
220	10	return ERRC; /* premature EOD */
221	64.8k	return 0; /* need more data */
222	64.8k	}
223	142k	written = gs_jpeg_write_scanlines(ss, &samples, 1);
224	142k	if (written < 0)
225	0	return ERRC;
226	142k	if_debug3m('w', st->memory, "[wde]write returns %d, used=%u, written=%u\n",
227	142k	written,
228	142k	(uint) (samples - 1 - pr->ptr),
229	142k	(uint) (dest->next_output_byte - 1 - pw->ptr));
230	142k	pw->ptr = dest->next_output_byte - 1;
231	142k	if (!written)
232	2.66k	return 1; /* output full */
233	139k	pr->ptr += ss->scan_line_size;
234	139k	}
235	867	ss->phase = 5;
236		/* falls through */
237	867	case 5: /* all data processed, finishing */
238		/* jpeg_finish_compress can't suspend, so write its output
239		* to a fixed-size internal buffer.
240		*/
241	867	dest->next_output_byte = jcdp->finish_compress_buf;
242	867	dest->free_in_buffer = sizeof(jcdp->finish_compress_buf);
243	867	if (gs_jpeg_finish_compress(ss) < 0)
244	0	return ERRC;
245	867	jcdp->fcb_size =
246	867	dest->next_output_byte - jcdp->finish_compress_buf;
247	867	jcdp->fcb_pos = 0;
248	867	ss->phase = 6;
249		/* falls through */
250	867	case 6: /* copy the final data to the output */
251	867	if (jcdp->fcb_pos < jcdp->fcb_size) {
252	867	int count = min(jcdp->fcb_size - jcdp->fcb_pos,
253	867	pw->limit - pw->ptr);
254
255	867	if_debug1m('w', st->memory, "[wde]copying final %d\n", count);
256	867	memcpy(pw->ptr + 1, jcdp->finish_compress_buf + jcdp->fcb_pos,
257	867	count);
258	867	jcdp->fcb_pos += count;
259	867	pw->ptr += count;
260	867	if (jcdp->fcb_pos < jcdp->fcb_size)
261	0	return 1;
262	867	}
263	867	return EOFC;
264	68.3k	}
265		/* Default case can't happen.... */
266	0	return ERRC;
267	68.3k	}
268
269		/* Stream template */
270		const stream_template s_DCTE_template =
271		{&st_DCT_state, s_DCTE_init, s_DCTE_process, 1000, 4000, NULL,
272		s_DCTE_set_defaults
273		};