mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 09:55:53 +01:00
114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* SPSD - Naomi (arcade) and early Dreamcast streams [Guilty Gear X (Naomi), Crazy Taxi (Naomi), Virtua Tennis 2 (Naomi)] */
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VGMSTREAM * init_vgmstream_naomi_spsd(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, codec, flags, index;
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/* checks */
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/* .str: actual extension, rare [Shenmue (DC)]
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* .spsd: header id */
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if (!check_extensions(streamFile, "str,spsd"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x53505344) /* "SPSD" */
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goto fail;
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if (read_32bitBE(0x04,streamFile) != 0x01010004 && /* standard version */
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read_32bitBE(0x04,streamFile) != 0x00010004) /* uncommon version [Crazy Taxi (Naomi)] */
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goto fail;
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codec = read_8bit(0x08,streamFile);
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flags = read_8bit(0x09,streamFile);
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index = read_16bitLE(0x0a,streamFile);
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data_size = read_32bitLE(0x0c,streamFile);
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//if (data_size + start_offset != get_streamfile_size(streamFile))
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// goto fail; /* some rips out there have incorrect padding */
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//todo with 0x80 seems 0x2c is a loop_start_sample but must be adjusted to +1 block? (uncommon flag though)
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loop_flag = (flags & 0x80);
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channel_count = ((flags & 0x01) || (flags & 0x02)) ? 2 : 1; /* 0x02 is rare but looks normal (Virtua Tennis 2) */
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start_offset = 0x40;
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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->sample_rate = (uint16_t)read_16bitLE(0x2A,streamFile);
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vgmstream->meta_type = meta_NAOMI_SPSD;
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switch (codec) {
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case 0x00: /* [Virtua Tennis 2 (Naomi), Club Kart - European Session (Naomi)] */
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vgmstream->coding_type = coding_PCM16LE;
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vgmstream->num_samples = pcm_bytes_to_samples(data_size,channel_count,16);
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vgmstream->loop_start_sample = read_32bitLE(0x2c,streamFile) + pcm_bytes_to_samples(0x2000*channel_count,channel_count,16);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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break;
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case 0x01: /* [Virtua Tennis 2 (Naomi)] */
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vgmstream->coding_type = coding_PCM8;
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vgmstream->num_samples = pcm_bytes_to_samples(data_size,channel_count,8);
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vgmstream->loop_start_sample = read_32bitLE(0x2c,streamFile) + pcm_bytes_to_samples(0x2000*channel_count,channel_count,8);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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break;
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case 0x03: /* standard */
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vgmstream->coding_type = coding_AICA_int;
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vgmstream->num_samples = yamaha_bytes_to_samples(data_size,channel_count);
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vgmstream->loop_start_sample = /*read_32bitLE(0x2c,streamFile) +*/ yamaha_bytes_to_samples(0x2000*channel_count,channel_count);
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vgmstream->loop_end_sample = vgmstream->num_samples;
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break;
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default:
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goto fail;
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}
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/* interleave index, maybe */
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switch(index) {
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case 0x0000:
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if (channel_count != 1) goto fail;
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vgmstream->layout_type = layout_none;
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break;
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case 0x000d:
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x2000;
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if (vgmstream->interleave_block_size)
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vgmstream->interleave_last_block_size = (data_size % (vgmstream->interleave_block_size*vgmstream->channels)) / vgmstream->channels;
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break;
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case 0x00ff:
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = data_size / channel_count;
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break;
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default:
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goto fail;
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}
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/* todo seems to decode slightly incorrectly in after certain data (loop section start?)
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* may depend on values in 0x20 or 0x2c [ex. Marvel vs Capcom 2 (Naomi)]
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* at 0x30(4*ch) is some config per channel but doesn't seem to affect ADPCM (found with PCM too) */
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{
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int i;
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for (i = 0; i < channel_count; i++) {
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vgmstream->ch[i].adpcm_step_index = 0x7f;
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}
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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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