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57 lines
1.8 KiB
C
57 lines
1.8 KiB
C
#include "meta.h"
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/* DVI - from Konami KCE Nayoga SAT games (Castlevania Symphony of the Night, Jikkyou Oshaberi Parodius - Forever with Me) */
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VGMSTREAM* init_vgmstream_sat_dvi(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channels;
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/* checks
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* .pcm: original
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* .dvi: header id (to be removed )*/
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if (!check_extensions(sf,"pcm,dvi"))
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goto fail;
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if (!is_id32be(0x00,sf, "DVI."))
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goto fail;
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start_offset = read_s32be(0x04,sf);
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loop_flag = (read_s32be(0x0C,sf) != -1);
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channels = 2; /* no mono files seem to exists */
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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->sample_rate = 44100;
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vgmstream->num_samples = read_s32be(0x08,sf);
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vgmstream->loop_start_sample = read_s32be(0x0C,sf);
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vgmstream->loop_end_sample = read_s32be(0x08,sf);
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vgmstream->coding_type = coding_DVI_IMA_int;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x4;
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vgmstream->meta_type = meta_SAT_DVI;
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/* at 0x10 (L) / 0x20 (R): probably ADPCM loop history @+0x00 and step @+0x17 (not init values) */
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if (!vgmstream_open_stream(vgmstream, sf, start_offset) )
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goto fail;
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/* for some reason right channel goes first (tested in SOTN vs emu and PS/OST version), swap offsets */
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if (channels == 2) {
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off_t temp = vgmstream->ch[0].offset;
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vgmstream->ch[0].channel_start_offset =
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vgmstream->ch[0].offset = vgmstream->ch[1].offset;
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vgmstream->ch[1].channel_start_offset =
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vgmstream->ch[1].offset = temp;
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}
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return vgmstream;
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fail:
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if (vgmstream) close_vgmstream(vgmstream);
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return NULL;
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}
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