mirror of
https://github.com/vgmstream/vgmstream.git
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56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* .STS - from Alfa System games [Shikigami no Shiro 3 (Wii)] */
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VGMSTREAM* init_vgmstream_sts(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t start_offset, data_size, channel_size;
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int loop_flag, channels, sample_rate;
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/* checks */
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data_size = read_u32be(0x00,sf);
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if (data_size + 0x04 != get_streamfile_size(sf))
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return NULL;
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if (!check_extensions(sf, "sts"))
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return NULL;
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channels = read_u8(0x08,sf) + 1;
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sample_rate = read_u16be(0x0c,sf);
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/* 0x10: dsp related? */
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/* 0x16: usable size */
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channel_size = read_u32be(0x1a,sf);
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loop_flag = 0; //(read_s32be(0x4C,sf) != -1); /* not seen */
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start_offset = (channels == 1) ? 0x70 : 0x50;
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/* build the VGMSTREAM */
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vgmstream = allocate_vgmstream(channels, loop_flag);
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if (!vgmstream) goto fail;
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vgmstream->meta_type = meta_STS;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = dsp_bytes_to_samples(channel_size, 1);
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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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 = channel_size + 0x2e;
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dsp_read_coefs_be(vgmstream, sf, 0x1e, start_offset - 0x1e + channel_size);
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dsp_read_hist_be(vgmstream, sf, 0x1e + 0x24, start_offset - 0x1e + channel_size);
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if (!vgmstream_open_stream(vgmstream, sf, 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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