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midifile: read up to 4 bytes for the varlen

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This commit is contained in:
Wim Taymans 2026-05-08 17:00:56 +02:00
parent c7f2f0dc73
commit c94bbb55bc
1 changed files with 9 additions and 5 deletions
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14
src/tools/midifile.c
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@ -108,14 +108,18 @@ static int parse_varlen(struct midi_file *mf, struct midi_track *tr, uint32_t *r
{
uint32_t value = 0;
uint8_t data[1];
int i;
while (mf_read(mf, data, 1) == 1) {
for (i = 0; i < 4; i++) {
if (mf_read(mf, data, 1) != 1)
return -EINVAL;
value = (value << 7) | (data[0] & 0x7f);
if ((data[0] & 0x80) == 0)
break;
if ((data[0] & 0x80) == 0) {
*result = value;
return 0;
}
}
*result = value;
return 0;
return -EINVAL;
}
static int read_delta_time(struct midi_file *mf, struct midi_track *tr)