Cool_Tools/vgmstream
1
0
Fork 0
mirror of https://github.com/vgmstream/vgmstream.git synced 2025-01-29 19:37:30 +01:00
Code Issues Packages Projects Releases Wiki Activity

Fix some .vas

Browse Source
This commit is contained in:
bnnm 2019-08-27 01:20:10 +02:00
parent f6f958f679
commit efde147534
1 changed files with 57 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
src/meta/ps2_vas.c
View File

@ -56,54 +56,86 @@ VGMSTREAM * init_vgmstream_ps2_vas_container(STREAMFILE *streamFile) {
off_t subfile_offset = 0;
size_t subfile_size = 0;
int total_subsongs, target_subsong = streamFile->stream_index;
int has_table;
/* checks */
if (!check_extensions(streamFile, "vas"))
goto fail;
if (read_32bitBE(0x00, streamFile) != 0xAB8A5A00) /* fixed value */
goto fail;
if (read_32bitLE(0x04, streamFile)*0x800 + 0x800 != get_streamfile_size(streamFile)) /* just in case */
goto fail;
if (read_32bitBE(0x00, streamFile) == 0xAB8A5A00) { /* fixed value */
/* offset table, 0x98 has table size */
has_table = read_32bitLE(0x94, streamFile);
/* just in case */
if (read_32bitLE(0x04, streamFile)*0x800 + 0x800 != get_streamfile_size(streamFile))
goto fail;
total_subsongs = read_32bitLE(0x08, streamFile); /* also at 0x10 */
if (target_subsong == 0) target_subsong = 1;
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
total_subsongs = read_32bitLE(0x08, streamFile); /* also at 0x10 */
if (target_subsong == 0) target_subsong = 1;
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
/* check offset table flag, 0x98 has table size */
if (read_32bitLE(0x94, streamFile)) {
off_t header_offset = 0x800 + 0x10*(target_subsong-1);
/* some values are repeats found in the file sub-header */
subfile_offset = read_32bitLE(header_offset + 0x00,streamFile) * 0x800;
subfile_size = read_32bitLE(header_offset + 0x08,streamFile) + 0x800;
}
else {
/* a bunch of files */
off_t offset = 0x800;
int i;
if (has_table) {
off_t header_offset = 0x800 + 0x10*(target_subsong-1);
for (i = 0; i < total_subsongs; i++) {
size_t size = read_32bitLE(offset, streamFile) + 0x800;
/* some values are repeats found in the file sub-header */
subfile_offset = read_32bitLE(header_offset + 0x00,streamFile) * 0x800;
subfile_size = read_32bitLE(header_offset + 0x08,streamFile) + 0x800;
if (i + 1 == target_subsong) {
subfile_offset = offset;
subfile_size = size;
break;
}
offset += size;
}
if (i == total_subsongs)
goto fail;
}
}
else {
/* a bunch of files */
off_t offset = 0x800;
int i;
/* some .vas are just files pasted together, better extracted externally but whatevs */
size_t file_size = get_streamfile_size(streamFile);
off_t offset = 0;
for (i = 0; i < total_subsongs; i++) {
size_t size = read_32bitLE(offset, streamFile) + 0x800;
/* must have multiple .vas */
if (read_32bitLE(0x00,streamFile) + 0x800 >= file_size)
goto fail;
if (i + 1 == target_subsong) {
subfile_offset = offset;
subfile_size = size;
break;
total_subsongs = 0;
if (target_subsong == 0) target_subsong = 1;
while (offset < file_size) {
size_t size = read_32bitLE(offset,streamFile) + 0x800;
/* some files can be null, ignore */
if (size > 0x800) {
total_subsongs++;
if (total_subsongs == target_subsong) {
subfile_offset = offset;
subfile_size = size;
}
}
offset += size;
}
if (i == total_subsongs)
/* should end exactly at file_size */
if (offset > file_size)
goto fail;
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
}
temp_streamFile = setup_subfile_streamfile(streamFile, subfile_offset,subfile_size, NULL);
if (!temp_streamFile) goto fail;