Added multimedia support (but no compression)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4213 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg
parent
8463a2bbd3
commit
123ae83b07
1 changed files with 117 additions and 52 deletions
169
tools/scramble.c
169
tools/scramble.c
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@ -20,6 +20,22 @@
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#include <stdio.h>
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#include <stdlib.h>
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void int2le(unsigned int val, unsigned char* addr)
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{
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addr[0] = val & 0xFF;
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addr[1] = (val >> 8) & 0xff;
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addr[2] = (val >> 16) & 0xff;
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addr[3] = (val >> 24) & 0xff;
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}
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void int2be(unsigned int val, unsigned char* addr)
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{
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addr[0] = (val >> 24) & 0xff;
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addr[1] = (val >> 16) & 0xff;
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addr[2] = (val >> 8) & 0xff;
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addr[3] = val & 0xFF;
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}
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int main (int argc, char** argv)
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{
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unsigned long length,i,slen;
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@ -28,13 +44,20 @@ int main (int argc, char** argv)
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unsigned char header[24];
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unsigned char *iname = argv[1];
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unsigned char *oname = argv[2];
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unsigned char *xorstring;
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int headerlen = 6;
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FILE* file;
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int version;
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int scramble=1;
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enum { none, scramble, xor } method = scramble;
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if (argc < 3) {
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printf("usage: %s [-fm] [-v2] [-neo]<input file> <output file>\n",argv[0]);
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printf("usage: %s [options] <input file> <output file> [xor string]\n",argv[0]);
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printf("options:\n");
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printf("\t-fm Archos FM recorder format\n");
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printf("\t-v2 Archos V2 recorder format\n");
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printf("\t-neo SSI Neo format\n");
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printf("\t-mm=X Archos Multimedia format (X values: A=JBMM, B=AV1xx, C=AV3xx)\n");
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printf("\nNo option results in Archos standard player/recorder format.\n");
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return -1;
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}
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@ -56,9 +79,21 @@ int main (int argc, char** argv)
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headerlen = 17;
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iname = argv[2];
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oname = argv[3];
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scramble = 0;
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method = none;
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}
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else if(!strncmp(argv[1], "-mm=", 4)) {
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headerlen = 16;
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iname = argv[2];
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oname = argv[3];
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method = xor;
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version = argv[1][4];
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if (argc > 4)
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xorstring = argv[4];
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else {
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printf("Multimedia needs an xor string\n");
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return -1;
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}
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}
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/* open file */
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file = fopen(iname,"rb");
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@ -70,7 +105,7 @@ int main (int argc, char** argv)
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length = ftell(file);
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length = (length + 3) & ~3; /* Round up to nearest 4 byte boundary */
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if ((length + headerlen) >= 0x32000) {
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if ((method == scramble) && ((length + headerlen) >= 0x32000)) {
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printf("error: max firmware size is 200KB!\n");
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fclose(file);
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return -1;
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@ -78,7 +113,10 @@ int main (int argc, char** argv)
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fseek(file,0,SEEK_SET);
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inbuf = malloc(length);
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outbuf = malloc(length);
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if (method == xor)
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outbuf = malloc(length*2);
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else
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outbuf = malloc(length);
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if ( !inbuf || !outbuf ) {
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printf("out of memory!\n");
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return -1;
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@ -92,15 +130,27 @@ int main (int argc, char** argv)
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}
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fclose(file);
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if(scramble) {
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/* scramble */
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slen = length/4;
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for (i = 0; i < length; i++) {
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unsigned long addr = (i >> 2) + ((i % 4) * slen);
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unsigned char data = inbuf[i];
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data = ~((data << 1) | ((data >> 7) & 1)); /* poor man's ROL */
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outbuf[addr] = data;
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}
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switch (method)
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{
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case scramble:
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slen = length/4;
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for (i = 0; i < length; i++) {
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unsigned long addr = (i >> 2) + ((i % 4) * slen);
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unsigned char data = inbuf[i];
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data = ~((data << 1) | ((data >> 7) & 1)); /* poor man's ROL */
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outbuf[addr] = data;
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}
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break;
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case xor:
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/* "compress" */
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slen = 0;
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for (i=0; i<length; i++) {
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if (!(i&7))
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outbuf[slen++] = 0xff; /* all data is uncompressed */
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outbuf[slen++] = inbuf[i];
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}
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break;
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}
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/* calculate checksum */
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@ -108,47 +158,62 @@ int main (int argc, char** argv)
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crc += inbuf[i];
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memset(header, 0, sizeof header);
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if(scramble) {
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if (headerlen == 6) {
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header[0] = (length >> 24) & 0xff;
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header[1] = (length >> 16) & 0xff;
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header[2] = (length >> 8) & 0xff;
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header[3] = length & 0xff;
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header[4] = (crc >> 8) & 0xff;
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header[5] = crc & 0xff;
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switch (method)
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{
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case scramble:
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if (headerlen == 6) {
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int2be(length, header);
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header[4] = (crc >> 8) & 0xff;
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header[5] = crc & 0xff;
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}
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else {
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header[0] =
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header[1] =
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header[2] =
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header[3] = 0xff; /* ??? */
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header[6] = (crc >> 8) & 0xff;
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header[7] = crc & 0xff;
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header[11] = version;
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header[15] = headerlen; /* really? */
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int2be(length, &header[20]);
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}
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break;
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case xor:
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{
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int xorlen = strlen(xorstring);
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/* calculate checksum */
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for (i=0; i<slen; i++)
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crc += outbuf[i];
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/* xor data */
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for (i=0; i<slen; i++)
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outbuf[i] ^= xorstring[i & (xorlen-1)];
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header[0] = header[2] = 'Z';
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header[1] = header[3] = version;
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int2le(length, &header[4]);
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int2le(slen, &header[8]);
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int2le(crc, &header[12]);
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length = slen;
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break;
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}
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else {
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header[0] =
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header[1] =
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header[2] =
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header[3] = 0xff; /* ??? */
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header[6] = (crc >> 8) & 0xff;
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header[7] = crc & 0xff;
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header[11] = version;
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header[15] = headerlen; /* really? */
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header[20] = (length >> 24) & 0xff;
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header[21] = (length >> 16) & 0xff;
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header[22] = (length >> 8) & 0xff;
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header[23] = length & 0xff;
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}
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}
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else {
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#define MY_FIRMWARE_TYPE "Rockbox"
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#define MY_HEADER_VERSION 1
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strncpy(header,MY_FIRMWARE_TYPE,9);
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header[9]='\0'; /*shouldn't have to, but to be SURE */
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header[10]=MY_HEADER_VERSION&0xFF;
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header[11]=(crc>>8)&0xFF;
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header[12]=crc&0xFF;
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header[13]=(sizeof(header)>>24)&0xFF;
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header[14]=(sizeof(header)>>16)&0xFF;
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header[15]=(sizeof(header)>>8)&0xFF;
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header[16]=sizeof(header)&0xFF;
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default:
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strncpy(header,MY_FIRMWARE_TYPE,9);
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header[9]='\0'; /*shouldn't have to, but to be SURE */
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header[10]=MY_HEADER_VERSION&0xFF;
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header[11]=(crc>>8)&0xFF;
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header[12]=crc&0xFF;
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int2be(sizeof(header), &header[12]);
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break;
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}
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/* write file */
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