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56 lines
1.9 KiB
C
56 lines
1.9 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 *streamFile) {
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VGMSTREAM * vgmstream = NULL;
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off_t start_offset;
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int loop_flag, channel_count;
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/* check extension (.pcm: original, .dvi: renamed to header id) */
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if ( !check_extensions(streamFile,"pcm,dvi") )
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goto fail;
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/* check header */
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if (read_32bitBE(0x00,streamFile) != 0x4456492E) /* "DVI." */
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goto fail;
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start_offset = read_32bitBE(0x04,streamFile);
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loop_flag = (read_32bitBE(0x0C,streamFile) != 0xFFFFFFFF);
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channel_count = 2; /* no mono files seem to exists */
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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 = 44100;
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vgmstream->num_samples = read_32bitBE(0x08,streamFile);
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vgmstream->loop_start_sample = read_32bitBE(0x0C,streamFile);
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vgmstream->loop_end_sample = read_32bitBE(0x08,streamFile);
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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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/* open the file for reading */
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if ( !vgmstream_open_stream(vgmstream, streamFile, 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 (channel_count == 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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