vgmstream/src/meta/ktsc.c

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#include "meta.h"
#include "../coding/coding.h"
#include "../layout/layout.h"
/* KTSC - Koei Tecmo KTSR container */
VGMSTREAM* init_vgmstream_ktsc(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
STREAMFILE* temp_sf = NULL;
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int target_subsong = sf->stream_index, total_subsongs;
uint32_t offset, subfile_offset, subfile_size;
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/* checks */
if (!is_id32be(0x00, sf, "KTSC"))
goto fail;
/* 0x04: version? (0x01000001: common, 0x01000004: FE Three Houses) */
/* .ktsl2asbin: common [Atelier Ryza (PC)]
* .asbin: Warriors Orochi 4 (PC) (assumed) */
if (!check_extensions(sf, "ktsl2asbin,asbin"))
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goto fail;
/* KTSC is a container of KTSRs, but can't be extracted easily as they use absolute pointers to the
* same stream companion file. KTSRs may have subsongs, but only seem to have 1, so use KTSC's subsongs. */
if (target_subsong == 0) target_subsong = 1;
total_subsongs = read_u32le(0x08, sf);
if (target_subsong > total_subsongs)
goto fail;
/* 0x0c: CRC(?) table start */
offset = read_u32le(0x10, sf);
/* 0x14: file size */
/* 0x18: header end */
/* 0x1c: null */
/* 0x20+: CRC(?) table, 1 entry per file */
subfile_offset = read_u32le(offset + 0x04 * (target_subsong - 1), sf);
subfile_size = read_u32le(subfile_offset + 0x1c, sf); /* from header, meh */
temp_sf = setup_subfile_streamfile(sf, subfile_offset, subfile_size, NULL);
if (!temp_sf) goto fail;
temp_sf->stream_index = 1;
vgmstream = init_vgmstream_ktsr(temp_sf);
if (!vgmstream) goto fail;
if (vgmstream->num_streams > 1)
goto fail;
vgmstream->num_streams = total_subsongs;
close_streamfile(temp_sf);
return vgmstream;
fail:
close_streamfile(temp_sf);
close_vgmstream(vgmstream);
return NULL;
}