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https://github.com/vgmstream/vgmstream.git
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63 lines
2.1 KiB
C
63 lines
2.1 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* BKHD - Wwise soundbank container */
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VGMSTREAM* init_vgmstream_bkhd(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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STREAMFILE* temp_sf = NULL;
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off_t subfile_offset, didx_offset, data_offset, offset;
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size_t subfile_size, didx_size;
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uint32_t subfile_id;
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int big_endian;
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uint32_t (*read_u32)(off_t,STREAMFILE*);
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int total_subsongs, target_subsong = sf->stream_index;
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/* checks */
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if (!check_extensions(sf,"bnk"))
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goto fail;
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if (read_u32be(0x00, sf) != 0x424B4844) /* "BKHD" */
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goto fail;
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big_endian = guess_endianness32bit(0x04, sf);
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read_u32 = big_endian ? read_u32be : read_u32le;
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/* Wwise banks have event/track/sequence/etc info in the HIRC chunk, as well
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* as other chunks, and may have a DIDX index to memory .wem in DATA.
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* We support the internal .wem mainly for quick tests, as the HIRC is
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* complex and better handled with TXTP (some info from Nicknine's script) */
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/* unlike RIFF first chunk follows chunk rules */
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if (!find_chunk(sf, 0x44494458, 0x00,0, &didx_offset, &didx_size, big_endian, 0)) /* "DIDX" */
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goto fail;
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if (!find_chunk(sf, 0x44415441, 0x00,0, &data_offset, NULL, big_endian, 0)) /* "DATA" */
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goto fail;
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total_subsongs = didx_size / 0x0c;
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if (target_subsong == 0) target_subsong = 1;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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offset = didx_offset + (target_subsong - 1) * 0x0c;
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subfile_id = read_u32(offset + 0x00, sf);
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subfile_offset = read_u32(offset + 0x04, sf) + data_offset;
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subfile_size = read_u32(offset + 0x08, sf);
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temp_sf = setup_subfile_streamfile(sf, subfile_offset, subfile_size, "wem");
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if (!temp_sf) goto fail;
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vgmstream = init_vgmstream_wwise(temp_sf);
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if (!vgmstream) goto fail;
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vgmstream->num_streams = total_subsongs;
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snprintf(vgmstream->stream_name, STREAM_NAME_SIZE, "%i", subfile_id);
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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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