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Adjust raw XA detection for some DC STR

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This commit is contained in:
bnnm 2018-01-27 17:08:04 +01:00
parent d8c81bc14a
commit 2300a1165d
1 changed files with 17 additions and 10 deletions
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27
src/meta/psx_cdxa.c
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@ -39,20 +39,27 @@ VGMSTREAM * init_vgmstream_cdxa(STREAMFILE *streamFile) {
}
}
/* test first block (except when RIFF) */
/* test some blocks (except when RIFF) since other .XA/STR may start blank */
if (start_offset == 0) {
int i, j;
int i, j, block;
off_t test_offset = start_offset;
size_t sector_size = (is_blocked ? 0x900 : 0x800);
size_t block_size = 0x80;
/* 0x80 frames for 1 sector (max ~0x800 for ISO mode) */
for (i = 0; i < (0x800/0x80); i++) {
off_t test_offset = start_offset + (is_blocked ? 0x18 : 0x00) + 0x80*i;
for (block = 0; block < 3; block++) {
test_offset += (is_blocked ? 0x18 : 0x00); /* header */
/* ADPCM predictors should be 0..3 index */
for (j = 0; j < 16; j++) {
uint8_t header = read_8bit(test_offset + i, streamFile);
if (((header >> 4) & 0xF) > 3)
goto fail;
for (i = 0; i < (sector_size/block_size); i++) {
/* first 0x10 ADPCM predictors should be 0..3 index */
for (j = 0; j < 16; j++) {
uint8_t header = read_8bit(test_offset + i, streamFile);
if (((header >> 4) & 0xF) > 3)
goto fail;
}
test_offset += 0x80;
}
test_offset += (is_blocked ? 0x18 : 0x00); /* footer */
}
}