From 123ae83b07b1a9b1fd8938400813117a26087f3a Mon Sep 17 00:00:00 2001 From: Björn Stenberg Date: Thu, 8 Jan 2004 21:34:52 +0000 Subject: Added multimedia support (but no compression) git-svn-id: svn://svn.rockbox.org/rockbox/trunk@4213 a1c6a512-1295-4272-9138-f99709370657 --- tools/scramble.c | 165 ++++++++++++++++++++++++++++++++++++++----------------- 1 file changed, 115 insertions(+), 50 deletions(-) diff --git a/tools/scramble.c b/tools/scramble.c index 0021bcacaa..8e3f7395a5 100644 --- a/tools/scramble.c +++ b/tools/scramble.c @@ -20,6 +20,22 @@ #include #include +void int2le(unsigned int val, unsigned char* addr) +{ + addr[0] = val & 0xFF; + addr[1] = (val >> 8) & 0xff; + addr[2] = (val >> 16) & 0xff; + addr[3] = (val >> 24) & 0xff; +} + +void int2be(unsigned int val, unsigned char* addr) +{ + addr[0] = (val >> 24) & 0xff; + addr[1] = (val >> 16) & 0xff; + addr[2] = (val >> 8) & 0xff; + addr[3] = val & 0xFF; +} + int main (int argc, char** argv) { unsigned long length,i,slen; @@ -28,13 +44,20 @@ int main (int argc, char** argv) unsigned char header[24]; unsigned char *iname = argv[1]; unsigned char *oname = argv[2]; + unsigned char *xorstring; int headerlen = 6; FILE* file; int version; - int scramble=1; + enum { none, scramble, xor } method = scramble; if (argc < 3) { - printf("usage: %s [-fm] [-v2] [-neo] \n",argv[0]); + printf("usage: %s [options] [xor string]\n",argv[0]); + printf("options:\n"); + printf("\t-fm Archos FM recorder format\n"); + printf("\t-v2 Archos V2 recorder format\n"); + printf("\t-neo SSI Neo format\n"); + printf("\t-mm=X Archos Multimedia format (X values: A=JBMM, B=AV1xx, C=AV3xx)\n"); + printf("\nNo option results in Archos standard player/recorder format.\n"); return -1; } @@ -56,10 +79,22 @@ int main (int argc, char** argv) headerlen = 17; iname = argv[2]; oname = argv[3]; - scramble = 0; + method = none; + } + else if(!strncmp(argv[1], "-mm=", 4)) { + headerlen = 16; + iname = argv[2]; + oname = argv[3]; + method = xor; + version = argv[1][4]; + if (argc > 4) + xorstring = argv[4]; + else { + printf("Multimedia needs an xor string\n"); + return -1; + } } - /* open file */ file = fopen(iname,"rb"); if (!file) { @@ -70,7 +105,7 @@ int main (int argc, char** argv) length = ftell(file); length = (length + 3) & ~3; /* Round up to nearest 4 byte boundary */ - if ((length + headerlen) >= 0x32000) { + if ((method == scramble) && ((length + headerlen) >= 0x32000)) { printf("error: max firmware size is 200KB!\n"); fclose(file); return -1; @@ -78,7 +113,10 @@ int main (int argc, char** argv) fseek(file,0,SEEK_SET); inbuf = malloc(length); - outbuf = malloc(length); + if (method == xor) + outbuf = malloc(length*2); + else + outbuf = malloc(length); if ( !inbuf || !outbuf ) { printf("out of memory!\n"); return -1; @@ -92,15 +130,27 @@ int main (int argc, char** argv) } fclose(file); - if(scramble) { - /* scramble */ - slen = length/4; - for (i = 0; i < length; i++) { - unsigned long addr = (i >> 2) + ((i % 4) * slen); - unsigned char data = inbuf[i]; - data = ~((data << 1) | ((data >> 7) & 1)); /* poor man's ROL */ - outbuf[addr] = data; - } + switch (method) + { + case scramble: + slen = length/4; + for (i = 0; i < length; i++) { + unsigned long addr = (i >> 2) + ((i % 4) * slen); + unsigned char data = inbuf[i]; + data = ~((data << 1) | ((data >> 7) & 1)); /* poor man's ROL */ + outbuf[addr] = data; + } + break; + + case xor: + /* "compress" */ + slen = 0; + for (i=0; i> 24) & 0xff; - header[1] = (length >> 16) & 0xff; - header[2] = (length >> 8) & 0xff; - header[3] = length & 0xff; - header[4] = (crc >> 8) & 0xff; - header[5] = crc & 0xff; - } - else { - header[0] = - header[1] = - header[2] = - header[3] = 0xff; /* ??? */ - - header[6] = (crc >> 8) & 0xff; - header[7] = crc & 0xff; + switch (method) + { + case scramble: + if (headerlen == 6) { + int2be(length, header); + header[4] = (crc >> 8) & 0xff; + header[5] = crc & 0xff; + } + else { + header[0] = + header[1] = + header[2] = + header[3] = 0xff; /* ??? */ + + header[6] = (crc >> 8) & 0xff; + header[7] = crc & 0xff; + + header[11] = version; + + header[15] = headerlen; /* really? */ + + int2be(length, &header[20]); + } + break; - header[11] = version; + case xor: + { + int xorlen = strlen(xorstring); - header[15] = headerlen; /* really? */ + /* calculate checksum */ + for (i=0; i> 24) & 0xff; - header[21] = (length >> 16) & 0xff; - header[22] = (length >> 8) & 0xff; - header[23] = length & 0xff; + /* xor data */ + for (i=0; i>8)&0xFF; - header[12]=crc&0xFF; - header[13]=(sizeof(header)>>24)&0xFF; - header[14]=(sizeof(header)>>16)&0xFF; - header[15]=(sizeof(header)>>8)&0xFF; - header[16]=sizeof(header)&0xFF; + default: + strncpy(header,MY_FIRMWARE_TYPE,9); + header[9]='\0'; /*shouldn't have to, but to be SURE */ + header[10]=MY_HEADER_VERSION&0xFF; + header[11]=(crc>>8)&0xFF; + header[12]=crc&0xFF; + int2be(sizeof(header), &header[12]); + break; } /* write file */ -- cgit v1.2.3