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https://github.com/vgmstream/vgmstream.git
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70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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VGMSTREAM * init_vgmstream_ktss(STREAMFILE *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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int loop_flag, channel_count;
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int8_t version;
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int32_t loop_length, coef_start_offset, coef_spacing;
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off_t start_offset;
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int8_t channelMultiplier;
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if (!check_extensions(streamFile, "kns,ktss"))
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goto fail;
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if (read_32bitBE(0, streamFile) != 0x4B545353) /* "KTSS" */
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goto fail;
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/* check type details */
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version = read_8bit(0x22, streamFile);
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if (version == 1) {
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coef_start_offset = 0x40;
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coef_spacing = 0x2e;
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}
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else if (version == 3) { // Fire Emblem Warriors (Switch)
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coef_start_offset = 0x5c;
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coef_spacing = 0x60;
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}
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else
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goto fail;
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loop_length = read_32bitLE(0x38, streamFile);
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loop_flag = loop_length > 0;
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// For unknown reasons, a channel multiplier is necessary in Hyrule Warriors (Switch)
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// It seems to be present in other Koei Tecmo KNS but the channel count was always
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// explicitly defined in the 0x29 byte. Here, 10 channel files have '2' in 0x29*
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// and '5' in 0x28 whereas previous titles usually contained '1'
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// This is super meh on KT's part but whatever
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channelMultiplier = read_8bit(0x28, streamFile);
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channel_count = read_8bit(0x29, streamFile) * channelMultiplier;
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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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/* fill in the vital statistics */
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vgmstream->num_samples = read_32bitLE(0x30, streamFile);
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vgmstream->sample_rate = (uint16_t)read_16bitLE(0x2c, streamFile);
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vgmstream->loop_start_sample = read_32bitLE(0x34, streamFile);
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vgmstream->loop_end_sample = vgmstream->loop_start_sample + loop_length;
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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_interleave;
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vgmstream->meta_type = meta_KTSS;
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vgmstream->interleave_block_size = 0x8;
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dsp_read_coefs_le(vgmstream, streamFile, coef_start_offset, coef_spacing);
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start_offset = read_32bitLE(0x24, streamFile) + 0x20;
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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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