mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-23 20:04:50 +01:00
92 lines
3.2 KiB
C
92 lines
3.2 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, num_layers, codec_id;
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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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size_t data_size, skip = 0;
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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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codec_id = read_8bit(0x20, streamFile);
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loop_length = read_32bitLE(0x38, streamFile);
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loop_flag = loop_length > 0;
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// A layered stream/track model seems to be used in Hyrule Warriors (Switch).
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// It's also present in other Koei Tecmo KNS but the channel count was always
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// explicitly defined in the 0x29 byte and the number of layers was set to 1.
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// Here, 10 channel files are set up with 2 channels in 5 layers.
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// Super hacky on KT's part and ours to implement but it works.
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num_layers = read_8bit(0x28, streamFile);
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channel_count = read_8bit(0x29, streamFile) * num_layers;
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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 = read_32bitLE(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->meta_type = meta_KTSS;
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start_offset = read_32bitLE(0x24, streamFile) + 0x20;
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switch (codec_id) {
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case 0x2: /* DSP ADPCM - Hyrule Warriors, Fire Emblem Warriors, and other Koei Tecmo games */
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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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vgmstream->coding_type = coding_NGC_DSP;
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vgmstream->layout_type = layout_interleave;
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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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break;
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#ifdef VGM_USE_FFMPEG
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case 0x9: /* Opus - Dead or Alive Xtreme 3: Scarlet */
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data_size = read_32bitLE(0x44, streamFile);
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{
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vgmstream->codec_data = init_ffmpeg_switch_opus(streamFile, start_offset, data_size, vgmstream->channels, skip, vgmstream->sample_rate);
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if (!vgmstream->codec_data) goto fail;
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vgmstream->coding_type = coding_FFmpeg;
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vgmstream->layout_type = layout_none;
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if (vgmstream->num_samples == 0) {
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vgmstream->num_samples = switch_opus_get_samples(start_offset, data_size, streamFile) - skip;
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}
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}
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break;
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default:
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goto fail;
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#endif
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}
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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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