mirror of
https://github.com/vgmstream/vgmstream.git
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59 lines
2.0 KiB
C
59 lines
2.0 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .sdt - from High Voltage games? [Baldur's Gate - Dark Alliance (GC)] */
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VGMSTREAM * init_vgmstream_sdt(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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size_t data_size;
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int loop_flag, channel_count;
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/* checks */
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if (!check_extensions(streamFile, "sdt"))
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goto fail;
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channel_count = read_32bitBE(0x00,streamFile); /* assumed */
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loop_flag = (read_32bitBE(0x04,streamFile) != 0);
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start_offset = 0xA0;
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data_size = get_streamfile_size(streamFile) - start_offset;
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if (channel_count != 2)
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goto fail; /* only seen this */
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if (read_32bitBE(0x08,streamFile) != read_32bitBE(0x08,streamFile))
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goto fail; /* sample rate agreement between channels */
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if (read_32bitBE(0x98,streamFile) != 0x8000)
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goto fail; /* expected interleave */
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channel_count,loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_SDT;
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vgmstream->sample_rate = read_32bitBE(0x08,streamFile);
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vgmstream->num_samples = dsp_bytes_to_samples(data_size, channel_count); /* maybe at @0x14 - 2? */
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if (loop_flag) {
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vgmstream->loop_start_sample = 0; /* maybe @0x08? */
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vgmstream->loop_end_sample = vgmstream->num_samples; /* maybe @0x10? */
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}
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x8000;
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if (vgmstream->interleave_block_size)
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vgmstream->interleave_last_block_size =
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(data_size % (vgmstream->interleave_block_size*vgmstream->channels)) / vgmstream->channels;
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dsp_read_coefs_be(vgmstream,streamFile, 0x3c,0x2E);
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dsp_read_hist_be(vgmstream, streamFile, 0x60,0x2E);
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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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goto fail;
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return vgmstream;
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fail:
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close_vgmstream(vgmstream);
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return NULL;
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}
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