ref: 3ab23ef29a9baa59e22a774a9d0c9c166b081a55
dir: /id3v1.c/
/* * http://en.wikipedia.org/wiki/ID3 * Space-padded strings are mentioned there. This is wrong and is a lie. */ #include "tagspriv.h" enum { Insz = 128, Outsz = 61, }; int tagid3v1(Tagctx *ctx) { uchar *in, *out; if(ctx->bufsz < Insz+Outsz) return -1; in = (uchar*)ctx->buf; out = in + Insz; if(ctx->seek(ctx, -Insz, 2) < 0) return -1; if(ctx->read(ctx, in, Insz) != Insz || memcmp(in, "TAG", 3) != 0) return -1; if((ctx->found & 1<<Ttitle) == 0 && iso88591toutf8(out, Outsz, &in[3], 30) > 0) txtcb(ctx, Ttitle, "", out); if((ctx->found & 1<<Tartist) == 0 && iso88591toutf8(out, Outsz, &in[33], 30) > 0) txtcb(ctx, Tartist, "", out); if((ctx->found & 1<<Talbum) == 0 && iso88591toutf8(out, Outsz, &in[63], 30) > 0) txtcb(ctx, Talbum, "", out); in[93+4] = 0; if((ctx->found & 1<<Tdate) == 0 && in[93] != 0) txtcb(ctx, Tdate, "", &in[93]); if((ctx->found & 1<<Ttrack) == 0 && in[125] == 0 && in[126] > 0){ snprint((char*)out, Outsz, "%d", in[126]); txtcb(ctx, Ttrack, "", out); } if((ctx->found & 1<<Tgenre) == 0 && in[127] < Numgenre) txtcb(ctx, Tgenre, "", id3genres[in[127]]); return 0; }