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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 for(uint16_t j = 0; j < num_infiles; j++) {
89 for(uint16_t k = 0; k < FPGA_INTERLEAVE_SIZE; k++) {
90 c = fgetc(infile[j]);
91 if (!feof(infile[j])) {
92 fpga_config[i++] = c;
93 } else if (num_infiles > 1) {
94 fpga_config[i++] = '\0';
95 }
96 }
97 }
98
99 if (i > num_infiles * FPGA_CONFIG_SIZE) {
100 fprintf(stderr, "Input files too big (total of %ld > %d bytes). These are probably not PM3 FPGA config files.", i, num_infiles*FPGA_CONFIG_SIZE);
101 for(uint16_t j = 0; j < num_infiles; j++) {
102 fclose(infile[j]);
103 }
104 return -1;
105 }
106 } while (!all_feof(infile, num_infiles));
107
108 // initialize zlib structures
109 compressed_fpga_stream.next_in = fpga_config;
110 compressed_fpga_stream.avail_in = i;
111 compressed_fpga_stream.zalloc = fpga_deflate_malloc;
112 compressed_fpga_stream.zfree = fpga_deflate_free;
113
114 ret = deflateInit2(&compressed_fpga_stream,
115 COMPRESS_LEVEL,
116 Z_DEFLATED,
117 COMPRESS_WINDOW_BITS,
118 COMPRESS_MEM_LEVEL,
119 COMPRESS_STRATEGY);
120
121 // estimate the size of the compressed output
122 unsigned int outsize_max = deflateBound(&compressed_fpga_stream, compressed_fpga_stream.avail_in);
123 uint8_t *outbuf = malloc(outsize_max);
124 compressed_fpga_stream.next_out = outbuf;
125 compressed_fpga_stream.avail_out = outsize_max;
126
127 if (ret == Z_OK) {
128 ret = deflateTune(&compressed_fpga_stream,
129 COMPRESS_GOOD_LENGTH,
130 COMPRESS_MAX_LAZY,
131 COMPRESS_MAX_NICE_LENGTH,
132 COMPRESS_MAX_CHAIN);
133 }
134
135 if (ret == Z_OK) {
136 ret = deflate(&compressed_fpga_stream, Z_FINISH);
137 }
138
139 fprintf(stderr, "compressed %d input bytes to %d output bytes\n", i, compressed_fpga_stream.total_out);
140
141 if (ret != Z_STREAM_END) {
142 fprintf(stderr, "Error in deflate(): %d %s\n", ret, compressed_fpga_stream.msg);
143 free(outbuf);
144 deflateEnd(&compressed_fpga_stream);
145 for(uint16_t j = 0; j < num_infiles; j++) {
146 fclose(infile[j]);
147 }
148 fclose(outfile);
149 free(infile);
150 free(fpga_config);
151 return -1;
152 }
153
154 for (i = 0; i < compressed_fpga_stream.total_out; i++) {
155 fputc(outbuf[i], outfile);
156 }
157
158 free(outbuf);
159 deflateEnd(&compressed_fpga_stream);
160 for(uint16_t j = 0; j < num_infiles; j++) {
161 fclose(infile[j]);
162 }
163 fclose(outfile);
164 free(infile);
165 free(fpga_config);
166
167 return 0;
168
169 }
170
171
172 int zlib_decompress(FILE *infile, FILE *outfile)
173 {
174 #define DECOMPRESS_BUF_SIZE 1024
175 uint8_t outbuf[DECOMPRESS_BUF_SIZE];
176 uint8_t inbuf[DECOMPRESS_BUF_SIZE];
177 int ret;
178
179 z_stream compressed_fpga_stream;
180
181 // initialize zlib structures
182 compressed_fpga_stream.next_in = inbuf;
183 compressed_fpga_stream.avail_in = 0;
184 compressed_fpga_stream.next_out = outbuf;
185 compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
186 compressed_fpga_stream.zalloc = fpga_deflate_malloc;
187 compressed_fpga_stream.zfree = fpga_deflate_free;
188
189 ret = inflateInit2(&compressed_fpga_stream, 0);
190
191 do {
192 if (compressed_fpga_stream.avail_in == 0) {
193 compressed_fpga_stream.next_in = inbuf;
194 uint16_t i = 0;
195 do {
196 uint8_t c = fgetc(infile);
197 if (!feof(infile)) {
198 inbuf[i++] = c;
199 compressed_fpga_stream.avail_in++;
200 } else {
201 break;
202 }
203 } while (i < DECOMPRESS_BUF_SIZE);
204 }
205
206 ret = inflate(&compressed_fpga_stream, Z_SYNC_FLUSH);
207
208 if (ret != Z_OK && ret != Z_STREAM_END) {
209 break;
210 }
211
212 if (compressed_fpga_stream.avail_out == 0) {
213 for (uint16_t i = 0; i < DECOMPRESS_BUF_SIZE; i++) {
214 fputc(outbuf[i], outfile);
215 }
216 compressed_fpga_stream.avail_out = DECOMPRESS_BUF_SIZE;
217 compressed_fpga_stream.next_out = outbuf;
218 }
219 } while (ret == Z_OK);
220
221 if (ret == Z_STREAM_END) { // reached end of input
222 uint16_t i = 0;
223 while (compressed_fpga_stream.avail_out < DECOMPRESS_BUF_SIZE) {
224 fputc(outbuf[i++], outfile);
225 compressed_fpga_stream.avail_out++;
226 }
227 fclose(outfile);
228 fclose(infile);
229 return 0;
230 } else {
231 fprintf(stderr, "Error. Inflate() returned error %d, %s", ret, compressed_fpga_stream.msg);
232 fclose(outfile);
233 fclose(infile);
234 return -1;
235 }
236
237 }
238
239
240 int main(int argc, char **argv)
241 {
242 FILE **infiles;
243 FILE *outfile;
244
245 if (argc == 1 || argc == 2) {
246 usage();
247 return -1;
248 }
249
250 if (!strcmp(argv[1], "-d")) { // Decompress
251 infiles = calloc(1, sizeof(FILE*));
252 if (argc != 4) {
253 usage();
254 return -1;
255 }
256 infiles[0] = fopen(argv[2], "rb");
257 if (infiles[0] == NULL) {
258 fprintf(stderr, "Error. Cannot open input file %s", argv[2]);
259 return -1;
260 }
261 outfile = fopen(argv[3], "wb");
262 if (outfile == NULL) {
263 fprintf(stderr, "Error. Cannot open output file %s", argv[3]);
264 return -1;
265 }
266 return zlib_decompress(infiles[0], outfile);
267
268 } else { // Compress
269
270 infiles = calloc(argc-2, sizeof(FILE*));
271 for (uint16_t i = 0; i < argc-2; i++) {
272 infiles[i] = fopen(argv[i+1], "rb");
273 if (infiles[i] == NULL) {
274 fprintf(stderr, "Error. Cannot open input file %s", argv[i+1]);
275 return -1;
276 }
277 }
278 outfile = fopen(argv[argc-1], "wb");
279 if (outfile == NULL) {
280 fprintf(stderr, "Error. Cannot open output file %s", argv[argc-1]);
281 return -1;
282 }
283 return zlib_compress(infiles, argc-2, outfile);
284 }
285 }
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