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1 //-----------------------------------------------------------------------------
2 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
3 // at your option, any later version. See the LICENSE.txt file for the text of
4 // the license.
5 //-----------------------------------------------------------------------------
6 // Compression tool for FPGA config files. Compress several *.bit files at
7 // compile time. Decompression is done at run time (see fpgaloader.c).
8 // This uses the zlib library tuned to this specific case. The small file sizes
9 // allow to use "insane" parameters for optimum compression ratio.
10 //-----------------------------------------------------------------------------
11
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <stdint.h>
16 #include <stdbool.h>
17 #include "zlib.h"
18
19 #define MAX(a,b) ((a)>(b)?(a):(b))
20
21 // zlib configuration
22 #define COMPRESS_LEVEL 9 // use best possible compression
23 #define COMPRESS_WINDOW_BITS 15 // default = max = 15 for a window of 2^15 = 32KBytes
24 #define COMPRESS_MEM_LEVEL 9 // determines the amount of memory allocated during compression. Default = 8.
25 /* COMPRESS_STRATEGY can be
26 Z_DEFAULT_STRATEGY (the default),
27 Z_FILTERED (more huffmann, less string matching),
28 Z_HUFFMAN_ONLY (huffman only, no string matching)
29 Z_RLE (distances limited to one)
30 Z_FIXED (prevents the use of dynamic Huffman codes)
31 */
32 #define COMPRESS_STRATEGY Z_DEFAULT_STRATEGY
33 // zlib tuning parameters:
34 #define COMPRESS_GOOD_LENGTH 258
35 #define COMPRESS_MAX_LAZY 258
36 #define COMPRESS_MAX_NICE_LENGTH 258
37 #define COMPRESS_MAX_CHAIN 8192
38
39 #define FPGA_INTERLEAVE_SIZE 288 // (the FPGA's internal config frame size is 288 bits. Interleaving with 288 bytes should give best compression)
40 #define FPGA_CONFIG_SIZE 42336 // our current fpga_[lh]f.bit files are 42175 bytes. Rounded up to next multiple of FPGA_INTERLEAVE_SIZE
41
42 static void usage(void)
43 {
44 fprintf(stderr, "Usage: fpga_compress <infile1> <infile2> ... <infile_n> <outfile>\n");
45 fprintf(stderr, " Combine n FPGA bitstream files and compress them into one.\n\n");
46 fprintf(stderr, " fpga_compress -d <infile> <outfile>");
47 fprintf(stderr, " Decompress <infile>. Write result to <outfile>");
48 }
49
50
51 static voidpf fpga_deflate_malloc(voidpf opaque, uInt items, uInt size)
52 {
53 return malloc(items*size);
54 }
55
56
57 static void fpga_deflate_free(voidpf opaque, voidpf address)
58 {
59 return free(address);
60 }
61
62
63 static bool all_feof(FILE *infile[], uint8_t num_infiles)
64 {
65 for (uint16_t i = 0; i < num_infiles; i++) {
66 if (!feof(infile[i])) {
67 return false;
68 }
69 }
70
71 return true;
72 }
73
74
75 int zlib_compress(FILE *infile[], uint8_t num_infiles, FILE *outfile)
76 {
77 uint8_t *fpga_config;
78 uint32_t i;
79 int ret;
80 uint8_t c;
81 z_stream compressed_fpga_stream;
82
83 fpga_config = malloc(num_infiles * FPGA_CONFIG_SIZE);
84
85 // read the input files. Interleave them into fpga_config[]
86 i = 0;
87 do {
88
89 if (i >= num_infiles * FPGA_CONFIG_SIZE) {
90 fprintf(stderr, "Input files too big (total > %lu bytes). These are probably not PM3 FPGA config files.\n", num_infiles*FPGA_CONFIG_SIZE);
91 for(uint16_t j = 0; j < num_infiles; j++) {
92 fclose(infile[j]);
93 }
94 free(fpga_config);
95 return(EXIT_FAILURE);
96 }
97
98 for(uint16_t j = 0; j < num_infiles; j++) {
99 for(uint16_t k = 0; k < FPGA_INTERLEAVE_SIZE; k++) {
100 c = fgetc(infile[j]);
101 if (!feof(infile[j])) {
102 fpga_config[i++] = c;
103 } else if (num_infiles > 1) {
104 fpga_config[i++] = '\0';
105 }
106 }
107 }
108
109 } while (!all_feof(infile, num_infiles));
110
111 // initialize zlib structures
112 compressed_fpga_stream.next_in = fpga_config;
113 compressed_fpga_stream.avail_in = i;
114 compressed_fpga_stream.zalloc = fpga_deflate_malloc;
115 compressed_fpga_stream.zfree = fpga_deflate_free;
116 compressed_fpga_stream.opaque = Z_NULL;
117 ret = deflateInit2(&compressed_fpga_stream,
118 COMPRESS_LEVEL,
119 Z_DEFLATED,
120 COMPRESS_WINDOW_BITS,
121 COMPRESS_MEM_LEVEL,
122 COMPRESS_STRATEGY);
123
124 // estimate the size of the compressed output
125 unsigned int outsize_max = deflateBound(&compressed_fpga_stream, compressed_fpga_stream.avail_in);
126 uint8_t *outbuf = malloc(outsize_max);
127 compressed_fpga_stream.next_out = outbuf;
128 compressed_fpga_stream.avail_out = outsize_max;
129
130 if (ret == Z_OK) {
131 ret = deflateTune(&compressed_fpga_stream,
132 COMPRESS_GOOD_LENGTH,
133 COMPRESS_MAX_LAZY,
134 COMPRESS_MAX_NICE_LENGTH,
135 COMPRESS_MAX_CHAIN);
136 }
137
138 if (ret == Z_OK) {
139 ret = deflate(&compressed_fpga_stream, Z_FINISH);
140 }
141
142 fprintf(stderr, "compressed %lu input bytes to %lu output bytes\n", i, compressed_fpga_stream.total_out);
143
144 if (ret != Z_STREAM_END) {
145 fprintf(stderr, "Error in deflate(): %d %s\n", ret, compressed_fpga_stream.msg);
146 free(outbuf);
147 deflateEnd(&compressed_fpga_stream);
148 for(uint16_t j = 0; j < num_infiles; j++) {
149 fclose(infile[j]);
150 }
151 fclose(outfile);
152 free(infile);
153 free(fpga_config);
154 return(EXIT_FAILURE);
155 }
156
157 for (i = 0; i < compressed_fpga_stream.total_out; i++) {
158 fputc(outbuf[i], outfile);
159 }
160
161 free(outbuf);
162 deflateEnd(&compressed_fpga_stream);
163 for(uint16_t j = 0; j < num_infiles; j++) {
164 fclose(infile[j]);
165 }
166 fclose(outfile);
167 free(infile);
168 free(fpga_config);
169
170 return(EXIT_SUCCESS);
171
172 }
173
174
175 int zlib_decompress(FILE *infile, FILE *outfile)
176 {
177 #define DECOMPRESS_BUF_SIZE 1024
178 uint8_t outbuf[DECOMPRESS_BUF_SIZE];
179 uint8_t inbuf[DECOMPRESS_BUF_SIZE];
180 int ret;
181
182 z_stream compressed_fpga_stream;
183
184 // initialize zlib structures
185 compressed_fpga_stream.next_in = inbuf;
186 compressed_fpga_stream.avail_in = 0;
187 compressed_fpga_stream.next_out = outbuf;
188 compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
189 compressed_fpga_stream.zalloc = fpga_deflate_malloc;
190 compressed_fpga_stream.zfree = fpga_deflate_free;
191 compressed_fpga_stream.opaque = Z_NULL;
192
193 ret = inflateInit2(&compressed_fpga_stream, 0);
194
195 do {
196 if (compressed_fpga_stream.avail_in == 0) {
197 compressed_fpga_stream.next_in = inbuf;
198 uint16_t i = 0;
199 do {
200 int c = fgetc(infile);
201 if (!feof(infile)) {
202 inbuf[i++] = c & 0xFF;
203 compressed_fpga_stream.avail_in++;
204 } else {
205 break;
206 }
207 } while (i < DECOMPRESS_BUF_SIZE);
208 }
209
210 ret = inflate(&compressed_fpga_stream, Z_SYNC_FLUSH);
211
212 if (ret != Z_OK && ret != Z_STREAM_END) {
213 break;
214 }
215
216 if (compressed_fpga_stream.avail_out == 0) {
217 for (uint16_t i = 0; i < DECOMPRESS_BUF_SIZE; i++) {
218 fputc(outbuf[i], outfile);
219 }
220 compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
221 compressed_fpga_stream.next_out = outbuf;
222 }
223 } while (ret == Z_OK);
224
225 if (ret == Z_STREAM_END) { // reached end of input
226 uint16_t i = 0;
227 while (compressed_fpga_stream.avail_out < DECOMPRESS_BUF_SIZE) {
228 fputc(outbuf[i++], outfile);
229 compressed_fpga_stream.avail_out++;
230 }
231 fclose(outfile);
232 fclose(infile);
233 return(EXIT_SUCCESS);
234 } else {
235 fprintf(stderr, "Error. Inflate() returned error %d, %s", ret, compressed_fpga_stream.msg);
236 fclose(outfile);
237 fclose(infile);
238 return(EXIT_FAILURE);
239 }
240
241 }
242
243
244 int main(int argc, char **argv)
245 {
246 FILE **infiles;
247 FILE *outfile;
248
249 if (argc == 1 || argc == 2) {
250 usage();
251 return(EXIT_FAILURE);
252 }
253
254 if (!strcmp(argv[1], "-d")) { // Decompress
255 infiles = calloc(1, sizeof(FILE*));
256 if (argc != 4) {
257 usage();
258 return(EXIT_FAILURE);
259 }
260 infiles[0] = fopen(argv[2], "rb");
261 if (infiles[0] == NULL) {
262 fprintf(stderr, "Error. Cannot open input file %s", argv[2]);
263 return(EXIT_FAILURE);
264 }
265 outfile = fopen(argv[3], "wb");
266 if (outfile == NULL) {
267 fprintf(stderr, "Error. Cannot open output file %s", argv[3]);
268 return(EXIT_FAILURE);
269 }
270 return zlib_decompress(infiles[0], outfile);
271
272 } else { // Compress
273
274 infiles = calloc(argc-2, sizeof(FILE*));
275 for (uint16_t i = 0; i < argc-2; i++) {
276 infiles[i] = fopen(argv[i+1], "rb");
277 if (infiles[i] == NULL) {
278 fprintf(stderr, "Error. Cannot open input file %s", argv[i+1]);
279 return(EXIT_FAILURE);
280 }
281 }
282 outfile = fopen(argv[argc-1], "wb");
283 if (outfile == NULL) {
284 fprintf(stderr, "Error. Cannot open output file %s", argv[argc-1]);
285 return(EXIT_FAILURE);
286 }
287 return zlib_compress(infiles, argc-2, outfile);
288 }
289 }
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