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replace w/ MDEID3

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Nishi 2025-11-24 20:04:55 +09:00
commit 8a73d2cd4b
Signed by: nishi
GPG key ID: 27EF69B208EB9343
1 changed files with 19 additions and 90 deletions
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113
mauplay/id3.c
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@ -1,101 +1,30 @@
#include "mauplay.h"
static unsigned int syncsafe(FILE* f) {
unsigned char d[4];
unsigned int r = 0;
int i;
fread(d, 4, 1, f);
for(i = 0; i < 4; i++) {
r = r << 7;
r = r | (d[i] & 127);
}
return r;
}
static unsigned int big(FILE* f) {
unsigned char d[4];
unsigned int r = 0;
int i;
fread(d, 4, 1, f);
for(i = 0; i < 4; i++) {
r = r << 8;
r = r | d[i];
}
return r;
}
unsigned char* id3_findimage(const char* path, size_t* size) {
FILE* f = fopen(path, "rb");
size_t fsz;
unsigned char* buffer = MDEID3GetTag(path, "APIC", &fsz);
unsigned char* d = NULL;
char sig[3];
unsigned char ver[2];
unsigned char flag;
unsigned char frame[4];
unsigned int dsz = 0;
if(f == NULL) return NULL;
fread(sig, 3, 1, f);
if(memcmp(sig, "ID3", 3) != 0) return NULL;
fread(ver, 2, 1, f);
if(memcmp(ver, "\x04\x00", 2) != 0 && memcmp(ver, "\x03\x00", 2) != 0) return NULL;
fread(&flag, 1, 1, f);
if(flag & (1 << 6)) return NULL; /* FIXME */
if(flag & (1 << 7)) return NULL; /* what even is this??? */
dsz = syncsafe(f);
while(dsz > 0) {
unsigned int fsz;
fread(frame, 4, 1, f);
if(frame[0] == 0) break; /* XXX: Is this ok? */
if(memcmp(ver, "\x04\x00", 2) == 0) {
fsz = syncsafe(f);
} else {
fsz = big(f);
}
fseek(f, 2, SEEK_CUR);
if(memcmp(frame, "APIC", 4) == 0) {
unsigned char* buffer = malloc(fsz);
int i;
fread(buffer, fsz, 1, f);
for(i = 1; i < fsz; i++) {
if(buffer[i] == 0) break;
}
i++;
/* XXX: 0 is technically Other - am not sure if this should be done... */
if(buffer[i] == 0 || buffer[i] == 3) {
int count = (buffer[0] == 1 || buffer[0] == 2) ? 2 : 1;
i++;
for(; i < fsz; i++) {
if(buffer[i] == 0) count--;
if(count == 0) break;
}
i++;
d = malloc(fsz - i);
memcpy(d, buffer + i, fsz - i);
*size = fsz - i;
}
free(buffer);
if(d != NULL) break;
} else {
fseek(f, fsz, SEEK_CUR);
}
dsz -= 4 + 4 + 2 + fsz;
int i;
for(i = 1; i < fsz; i++) {
if(buffer[i] == 0) break;
}
i++;
/* XXX: 0 is technically Other - am not sure if this should be done... */
if(buffer[i] == 0 || buffer[i] == 3) {
int count = (buffer[0] == 1 || buffer[0] == 2) ? 2 : 1;
fclose(f);
i++;
for(; i < fsz; i++) {
if(buffer[i] == 0) count--;
if(count == 0) break;
}
i++;
d = malloc(fsz - i);
memcpy(d, buffer + i, fsz - i);
*size = fsz - i;
}
free(buffer);
return d;
}