X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/25056d8b470d9e4b71c9205faf617e4b3f80df33..f39198789b82c1dd545743778f9d2633a2af8bd8:/client/fpga_compress.c diff --git a/client/fpga_compress.c b/client/fpga_compress.c index 9e0946b2..db1ef81b 100644 --- a/client/fpga_compress.c +++ b/client/fpga_compress.c @@ -9,85 +9,41 @@ #include #include #include -#include "sleep.h" -#include "proxmark3.h" -#include "flash.h" -#include "uart.h" -#include "usb_cmd.h" +#include +#include "zlib.h" #define MAX(a,b) ((a)>(b)?(a):(b)) -struct huffman_record { - int16_t symbol; - uint16_t count; - uint8_t code_size; - uint8_t code; - struct huffman_record *left; - struct huffman_record *right; - struct huffman_record *next; - }; - -typedef struct huffman_record huffman_record_t; +// zlib configuration +#define COMPRESS_LEVEL 9 // use best possible compression #define FPGA_CONFIG_SIZE 42175 static uint8_t fpga_config[FPGA_CONFIG_SIZE]; -static huffman_record_t leaf_nodes[256]; -static uint8_t start_code[256]; static void usage(char *argv0) { - fprintf(stderr, "Usage: %s [-d] \n\n", argv0); - fprintf(stderr, "\t-d\tdecompress\n\n"); + fprintf(stderr, "Usage: %s \n\n", argv0); } -void add_to_heap(huffman_record_t **heap, huffman_record_t *new_record) +static voidpf fpga_deflate_malloc(voidpf opaque, uInt items, uInt size) { - huffman_record_t *succ = *heap; - huffman_record_t *pred = NULL; - -// fprintf(stderr, "Adding symbol %d, count %d\n", new_record->symbol, new_record->count); - - while (succ != NULL && new_record->count > succ->count) { - pred = succ; - succ = succ->next; - } - - // insert new record - new_record->next = succ; - if (pred == NULL) { // first record in heap - *heap = new_record; - } else { - pred->next = new_record; - } + fprintf(stderr, "zlib requested %d bytes\n", items*size); + return malloc(items*size); } - -uint16_t set_codesize(huffman_record_t *tree_ptr, uint8_t depth) + +static void fpga_deflate_free(voidpf opaque, voidpf address) { - uint16_t max_size = depth; - tree_ptr->code_size = depth; - if (tree_ptr->left != NULL) { - max_size = MAX(set_codesize(tree_ptr->left, depth+1), max_size); - } - if (tree_ptr->right != NULL) { - max_size = MAX(set_codesize(tree_ptr->right, depth+1), max_size); - } - return max_size; -} + fprintf(stderr, "zlib frees memory\n"); + return free(address); +} -int huffman_encode(FILE *infile, FILE *outfile) + +int zlib_compress(FILE *infile, FILE *outfile) { - int i; - - // init leaf_nodes: - for (i = 0; i < 256; i++) { - leaf_nodes[i].count = 0; - leaf_nodes[i].symbol = i; - leaf_nodes[i].left = NULL; - leaf_nodes[i].right = NULL; - leaf_nodes[i].next = NULL; - } + int i, ret; + z_stream compressed_fpga_stream; // read the input file into fpga_config[] and count occurrences of each symbol: i = 0; @@ -95,7 +51,6 @@ int huffman_encode(FILE *infile, FILE *outfile) uint8_t c; c = fgetc(infile); fpga_config[i++] = c; - leaf_nodes[c].count++; if (i > FPGA_CONFIG_SIZE+1) { fprintf(stderr, "Input file too big (> %d bytes). This is probably not a PM3 FPGA config file.", FPGA_CONFIG_SIZE); fclose(infile); @@ -103,98 +58,60 @@ int huffman_encode(FILE *infile, FILE *outfile) return -1; } } - - fprintf(stderr, "\nStatistics: (symbol: count)\n"); - for (i = 0; i < 256; i++) { - fprintf(stderr, "%3d: %5d\n", i, leaf_nodes[i].count); - } - - // build the Huffman tree: - huffman_record_t *heap_ptr = NULL; - for (i = 0; i < 256; i++) { - add_to_heap(&heap_ptr, &leaf_nodes[i]); - } - - fprintf(stderr, "\nSorted statistics: (symbol: count)\n"); - for (huffman_record_t *p = heap_ptr; p != NULL; p = p->next) { - fprintf(stderr, "%3d: %5d\n", p->symbol, p->count); - } - - for (i = 0; i < 255; i++) { - // remove and combine the first two nodes - huffman_record_t *p1, *p2; - p1 = heap_ptr; - p2 = heap_ptr->next; - heap_ptr = p2->next; - huffman_record_t *new_node = malloc(sizeof(huffman_record_t)); - new_node->left = p1; - new_node->right = p2; - new_node->count = p1->count + p2->count; - add_to_heap(&heap_ptr, new_node); - } + // initialize zlib structures + compressed_fpga_stream.next_in = fpga_config; + compressed_fpga_stream.avail_in = i; + compressed_fpga_stream.zalloc = fpga_deflate_malloc; + compressed_fpga_stream.zfree = fpga_deflate_free; - uint16_t max_codesize = set_codesize(heap_ptr, 0); - - fprintf(stderr, "\nStatistics: (symbol: count, codesize)\n"); - uint32_t compressed_size = 0; - for (i = 0; i < 256; i++) { - fprintf(stderr, "%3d: %5d, %d\n", leaf_nodes[i].symbol, leaf_nodes[i].count, leaf_nodes[i].code_size); - compressed_size += leaf_nodes[i].count * leaf_nodes[i].code_size; - } - fprintf(stderr, "Compressed size = %ld (%f% of original size)", (compressed_size+7)/8, (float)(compressed_size)/(FPGA_CONFIG_SIZE * 8) * 100); - fprintf(stderr, "Max Codesize = %d bits", max_codesize); + // estimate the size of the compressed output + unsigned int outsize_max = deflateBound(&compressed_fpga_stream, compressed_fpga_stream.avail_in); + uint8_t *outbuf = malloc(outsize_max); + compressed_fpga_stream.next_out = outbuf; + compressed_fpga_stream.avail_out = outsize_max; + fprintf(stderr, "Allocated %d bytes for output file (estimated upper bound)\n", outsize_max); - uint8_t code = 0; - for (i = max_codesize; i > 0; i--) { - code = (code + 1) >> 1; - start_code[i] = code; - for (uint16_t j = 0; j < 256; j++) { - if (leaf_nodes[j].code_size == i) { - leaf_nodes[j].code = code; - code++; - } - } + ret = deflateInit(&compressed_fpga_stream, COMPRESS_LEVEL); + + if (ret == Z_OK) { + ret = deflate(&compressed_fpga_stream, Z_FINISH); } - - fprintf(stderr, "\nStatistics: (symbol: count, codesize, code)\n"); - for (i = 0; i < 256; i++) { - fprintf(stderr, "%3d: %5d, %d, %02x\n", leaf_nodes[i].symbol, leaf_nodes[i].count, leaf_nodes[i].code_size, leaf_nodes[i].code); - } + fprintf(stderr, "produced %d bytes of output\n", compressed_fpga_stream.total_out); + + if (ret != Z_STREAM_END) { + fprintf(stderr, "Error in deflate(): %d %s\n", ret, compressed_fpga_stream.msg); + free(outbuf); + deflateEnd(&compressed_fpga_stream); + fclose(infile); + fclose(outfile); + return -1; + } + for (i = 0; i < compressed_fpga_stream.total_out; i++) { + fputc(outbuf[i], outfile); + } + + free(outbuf); + deflateEnd(&compressed_fpga_stream); fclose(infile); fclose(outfile); - - return 0; -} -int huffman_decode(FILE *infile, FILE *outfile) -{ return 0; + } + int main(int argc, char **argv) { - bool decode = false; char *infilename; char *outfilename; - if (argc < 3) { + if (argc != 3) { usage(argv[0]); return -1; - } - - if (argc > 3) { - if (!strcmp(argv[1], "-d")) { - decode = true; - infilename = argv[2]; - outfilename = argv[3]; - } else { - usage(argv[0]); - return -1; - } } else { infilename = argv[1]; outfilename = argv[2]; @@ -213,9 +130,5 @@ int main(int argc, char **argv) return -1; } - if (decode) { - return huffman_decode(infile, outfile); - } else { - return huffman_encode(infile, outfile); - } + return zlib_compress(infile, outfile); }