mirror of
https://github.com/vgmstream/vgmstream.git
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61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
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#include "meta.h"
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#include "../coding/coding.h"
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#include "../layout/layout.h"
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/* KTSC - Koei Tecmo KTSR container */
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VGMSTREAM* init_vgmstream_ktsc(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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STREAMFILE *temp_sf = NULL;
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int target_subsong = sf->stream_index, total_subsongs;
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off_t offset, subfile_offset;
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size_t subfile_size;
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/* checks */
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/* .ktsl2asbin: common [Atelier Ryza (PC)] */
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if (!check_extensions(sf, "ktsl2asbin"))
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goto fail;
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/* KTSC is a container of KTSRs, but can't be extracted easily as they use absolute pointers to the
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* same stream companion file. KTSRs may have subsongs, but only seem to have 1, so use KTSC's subsongs. */
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if (read_u32be(0x00, sf) != 0x4B545343) /* "KTSC" */
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goto fail;
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if (read_u32be(0x04, sf) != 0x01000001) /* version? */
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goto fail;
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if (target_subsong == 0) target_subsong = 1;
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total_subsongs = read_u32le(0x08, sf);
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if (target_subsong > total_subsongs)
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goto fail;
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/* 0x0c: CRC(?) table start */
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offset = read_u32le(0x10, sf);
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/* 0x14: file size */
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/* 0x18: header end */
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/* 0x1c: null */
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/* 0x20+: CRC(?) table, 1 entry per file */
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subfile_offset = read_u32le(offset + 0x04 * (target_subsong - 1), sf);
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subfile_size = read_u32le(subfile_offset + 0x1c, sf); /* from header, meh */
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temp_sf = setup_subfile_streamfile(sf, subfile_offset, subfile_size, NULL);
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if (!temp_sf) goto fail;
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temp_sf->stream_index = 1;
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vgmstream = init_vgmstream_ktsr(temp_sf);
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if (!vgmstream) goto fail;
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if (vgmstream->num_streams > 1)
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goto fail;
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vgmstream->num_streams = total_subsongs;
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close_streamfile(temp_sf);
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return vgmstream;
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fail:
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close_streamfile(temp_sf);
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close_vgmstream(vgmstream);
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return NULL;
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}
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