1 /**
2 * Copyright (C) 2021 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #define _GNU_SOURCE
17 #include <sys/types.h>
18 #include <sys/wait.h>
19 #include <string.h>
20 #include <stdlib.h>
21 #include "openjpeg.h"
22 #include "opj_includes.h"
23
24 #define REPEATVALUES 100000
25
26 unsigned char gStartValues[] = { 0xFF, 0x4F, 0xFF, 0x51, 0x00, 0x2F, 0x00, 0x00,
27 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x2E, 0x00, 0x00, 0x00, 0x00,
28 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46, 0x00, 0x00, 0x00, 0x2E,
29 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x07, 0x01,
30 0x01, 0x07, 0x01, 0x01, 0x07, 0x01, 0x01, 0xFF, 0x64, 0x00, 0x23, 0x00,
31 0x01, 0x43, 0x72, 0x65, 0x61, 0x74, 0x6F, 0x72, 0x3A, 0x20, 0x4A, 0x61,
32 0x73, 0x50, 0x65, 0x72, 0x20, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6F, 0x6E,
33 0x20, 0x31, 0x2E, 0x37, 0x30, 0x30, 0x2E, 0x31, 0xFF, 0x52, 0x00, 0x0C,
34 0x00, 0x00, 0x00, 0x01, 0x01, 0x05, 0x04, 0x04, 0x00, 0x01, 0xFF, 0x5C,
35 0x00, 0x13, 0x40, 0x40, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0x48, 0x48,
36 0x50, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0xFF, 0x5D, 0x00, 0x14, 0x01,
37 0x40, 0x40, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0x48,
38 0x48, 0x50, 0x48, 0x48, 0x50, 0xFF, 0x5D, 0x00, 0x14, 0x02, 0x40, 0x40,
39 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50, 0x48, 0x48, 0x50,
40 0x48, 0x48, 0x50 };
41 unsigned int gNumStartValues = sizeof(gStartValues) / sizeof(gStartValues[0]);
42
43 unsigned char gRepeatValues[] = { 0xFF, 0x75, 0x00, 0x09, 0x00, 0x00, 0x00,
44 0x00, 0x00, 0x00, 0x00 };
45 unsigned int gNumRepeatValues = sizeof(gRepeatValues)
46 / sizeof(gRepeatValues[0]);
47
48 unsigned char gLastValues[] = { 0xFF, 0x75, 0x00, 0x09, 0x00, 0x00, 0x01, 0x00,
49 0x00, 0x00, 0x00 };
50 unsigned int gNumLastValues = sizeof(gLastValues) / sizeof(gLastValues[0]);
51
52 typedef struct {
53 char* blob;
54 ssize_t blobSize;
55 ssize_t readPos;
56 } applicationContext;
57
allocate_stream(void)58 opj_stream_t* allocate_stream(void) {
59 opj_stream_private_t * stream = NULL;
60
61 stream = (opj_stream_private_t*) opj_calloc(1, sizeof(opj_stream_private_t));
62 if (!stream) {
63 return NULL;
64 }
65
66 stream->m_buffer_size = OPJ_J2K_STREAM_CHUNK_SIZE;
67 stream->m_stored_data = (OPJ_BYTE *) opj_malloc(OPJ_J2K_STREAM_CHUNK_SIZE);
68 if (!stream->m_stored_data) {
69 opj_free(stream);
70 return NULL;
71 }
72
73 stream->m_current_data = stream->m_stored_data;
74 stream->m_status |= OPJ_STREAM_STATUS_INPUT;
75 stream->m_opj_skip = opj_stream_read_skip;
76 stream->m_opj_seek = opj_stream_read_seek;
77 stream->m_read_fn = opj_stream_default_read;
78 stream->m_write_fn = opj_stream_default_write;
79 stream->m_skip_fn = opj_stream_default_skip;
80 stream->m_seek_fn = opj_stream_default_seek;
81
82 return (opj_stream_t *) stream;
83 }
84
ReadHandler(void * buffer,OPJ_SIZE_T length,void * context)85 static OPJ_SIZE_T ReadHandler(void *buffer, OPJ_SIZE_T length, void *context) {
86 applicationContext* appContext = (applicationContext*) context;
87 ssize_t count = 0;
88 ssize_t rem = 0;
89 if (!appContext) {
90 return ((OPJ_SIZE_T) - 1);
91 }
92 rem = appContext->blobSize - appContext->readPos;
93 if ((ssize_t) length <= rem) {
94 count = length;
95 } else {
96 count = rem;
97 }
98 memcpy(buffer, &appContext->blob[appContext->readPos], count);
99 appContext->readPos += count;
100 return ((OPJ_SIZE_T) length);
101 }
102
main(void)103 int main(void) {
104 ssize_t offset = 0;
105 unsigned int count = 0;
106 applicationContext sContext;
107 opj_j2k_t* codec = NULL;
108 opj_stream_t* stream = NULL;
109 opj_image_t* image = NULL;
110 opj_stream_private_t* private = NULL;
111 opj_event_mgr_t eventMgr;
112 stream = allocate_stream();
113 private = (opj_stream_private_t*)stream;
114
115 sContext.blobSize = gNumStartValues + REPEATVALUES * gNumRepeatValues
116 + gNumLastValues;
117 sContext.blob = (char*) opj_malloc(sContext.blobSize);
118 if (!sContext.blob) {
119 return EXIT_FAILURE;
120 }
121 memset(sContext.blob, 0, sContext.blobSize);
122
123 memcpy(&sContext.blob[offset], gStartValues, gNumStartValues);
124 offset += gNumStartValues;
125 for (count = 0; count < REPEATVALUES; ++count) {
126 memcpy(&sContext.blob[offset], gRepeatValues, gNumRepeatValues);
127 offset += gNumRepeatValues;
128 }
129 memcpy(&sContext.blob[offset], gLastValues, gNumLastValues);
130 offset += gNumLastValues;
131 sContext.readPos = 0;
132 private->m_read_fn = ReadHandler;
133 private->m_user_data = (void*)&sContext;
134 private->m_user_data_length = sContext.blobSize;
135 private->m_free_user_data_fn = NULL;
136 codec = opj_j2k_create_decompress();
137 opj_set_default_event_handler(&eventMgr);
138 opj_j2k_read_header(private,codec,&image,&eventMgr);
139 opj_free(sContext.blob);
140 return EXIT_SUCCESS;
141 }
142