/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Copyright (C) 2007 Dave Chapman * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include #include #include #include "system.h" #include "id3.h" #include "metadata_common.h" #include "metadata_parsers.h" bool get_monkeys_metadata(int fd, struct mp3entry* id3) { /* Use the trackname part of the id3 structure as a temporary buffer */ unsigned char* buf = (unsigned char *)id3->path; unsigned char* header; bool rc = false; uint32_t descriptorlength; uint32_t totalsamples; uint32_t blocksperframe, finalframeblocks, totalframes; int fileversion; lseek(fd, 0, SEEK_SET); if (read(fd, buf, 4) < 4) { return rc; } if (memcmp(buf, "MAC ", 4) != 0) { return rc; } read(fd, buf + 4, MAX_PATH - 4); fileversion = get_short_le(buf+4); if (fileversion < 3970) { /* Not supported */ return false; } if (fileversion >= 3980) { descriptorlength = get_long_le(buf+8); header = buf + descriptorlength; blocksperframe = get_long_le(header+4); finalframeblocks = get_long_le(header+8); totalframes = get_long_le(header+12); id3->frequency = get_long_le(header+20); } else { /* v3.95 and later files all have a fixed framesize */ blocksperframe = 73728 * 4; finalframeblocks = get_long_le(buf+28); totalframes = get_long_le(buf+24); id3->frequency = get_long_le(buf+12); } id3->vbr = true; /* All APE files are VBR */ id3->filesize = filesize(fd); totalsamples = finalframeblocks; if (totalframes > 1) totalsamples += blocksperframe * (totalframes-1); id3->length = ((int64_t) totalsamples * 1000) / id3->frequency; id3->bitrate = (id3->filesize * 8) / id3->length; return true; }