mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 12:24:50 +01:00
68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
|
|
|
|
/* .ifs - Konami arcade games container [drummania (AC), GITADORA (AC)] */
|
|
VGMSTREAM* init_vgmstream_ifs(STREAMFILE* sf) {
|
|
VGMSTREAM* vgmstream = NULL;
|
|
STREAMFILE* temp_sf = NULL;
|
|
off_t subfile_offset, subfile_size;
|
|
int total_subsongs, target_subsong = sf->stream_index;
|
|
|
|
|
|
/* checks */
|
|
if (!check_extensions(sf, "ifs"))
|
|
goto fail;
|
|
|
|
if (read_u32be(0x00,sf) != 0x6CAD8F89)
|
|
goto fail;
|
|
if (read_u16be(0x04,sf) != 0x0003)
|
|
goto fail;
|
|
|
|
/* .ifs format is a binary XML thing with types/fields/nodes/etc, that sometimes
|
|
* contains Konami's BMP as subsongs (may differ in num_samples). This is an
|
|
* abridged version of the whole thing, see:
|
|
* - https://github.com/mon/ifstools
|
|
* - https://github.com/mon/kbinxml
|
|
* - https://bitbucket.org/ahigerd/gitadora2wav/
|
|
*/
|
|
|
|
{
|
|
off_t offset, size, subfile_start;
|
|
|
|
subfile_start = read_u32be(0x10,sf);
|
|
|
|
/* skip root section and point to childs */
|
|
offset = 0x28 + 0x04 + read_u32be(0x28,sf);
|
|
size = read_u32be(offset + 0x00,sf);
|
|
offset += 0x04;
|
|
|
|
/* point to subfile offsets */
|
|
size = size - 0x04 - read_u32be(offset + 0x00,sf) - 0x04;
|
|
offset = offset + 0x04 + read_u32be(offset + 0x00,sf) + 0x04;
|
|
|
|
total_subsongs = size / 0x0c;
|
|
if (target_subsong == 0) target_subsong = 1;
|
|
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
|
|
|
|
subfile_offset = read_u32be(offset + (target_subsong-1)*0x0c + 0x00,sf) + subfile_start;
|
|
subfile_size = read_u32be(offset + (target_subsong-1)*0x0c + 0x04,sf);
|
|
}
|
|
|
|
temp_sf = setup_subfile_streamfile(sf, subfile_offset, subfile_size, "bin");
|
|
if (!temp_sf) goto fail;
|
|
|
|
vgmstream = init_vgmstream_bmp_konami(temp_sf);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->num_streams = total_subsongs;
|
|
/* subsongs have names but are packed in six-bit strings */
|
|
|
|
close_streamfile(temp_sf);
|
|
return vgmstream;
|
|
fail:
|
|
close_streamfile(temp_sf);
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|