66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <inttypes.h>
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#include "system.h"
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#include "metadata.h"
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#include "metadata_common.h"
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#include "metadata_parsers.h"
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#include "rbunicode.h"
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bool parse_gbs_header(int fd, struct mp3entry* id3)
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{
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/* Use the trackname part of the id3 structure as a temporary buffer */
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unsigned char* buf = (unsigned char *)id3->path;
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lseek(fd, 0, SEEK_SET);
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if (read(fd, buf, 112) < 112)
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return false;
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/* Calculate track length with number of subtracks */
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id3->length = buf[4] * 1000;
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/* If meta info was found in the m3u skip next step */
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if (id3->title && id3->title[0]) return true;
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char *p = id3->id3v2buf;
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/* Some metadata entries have 32 bytes length */
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/* Game */
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memcpy(p, &buf[16], 32); *(p + 33) = '\0';
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id3->title = p;
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p += strlen(p)+1;
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/* Artist */
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memcpy(p, &buf[48], 32); *(p + 33) = '\0';
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id3->artist = p;
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p += strlen(p)+1;
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/* Copyright */
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memcpy(p, &buf[80], 32); *(p + 33) = '\0';
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id3->album = p;
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return true;
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}
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bool get_gbs_metadata(int fd, struct mp3entry* id3)
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{
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char gbs_type[3];
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if ((lseek(fd, 0, SEEK_SET) < 0) ||
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(read(fd, gbs_type, 3) < 3))
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return false;
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id3->vbr = false;
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id3->filesize = filesize(fd);
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/* we only render 16 bits, 44.1KHz, Stereo */
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id3->bitrate = 706;
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id3->frequency = 44100;
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/* Check for GBS magic */
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if (memcmp( gbs_type, "GBS", 3 ) != 0)
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return false;
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return parse_gbs_header(fd, id3);
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}
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