92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* MSB+MSH - SCEE MultiStream flat bank [namCollection: Ace Combat 2 (PS2) sfx, EyeToy Play (PS2)] */
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VGMSTREAM* init_vgmstream_msb_msh(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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STREAMFILE* sh = NULL;
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off_t start_offset, header_offset = 0;
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size_t stream_size;
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int loop_flag, channels, sample_rate;
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int32_t loop_start, loop_end;
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int total_subsongs, target_subsong = sf->stream_index;
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uint32_t config;
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/* checks */
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if (!check_extensions(sf, "msb"))
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goto fail;
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sh = open_streamfile_by_ext(sf, "msh");
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if (!sh) goto fail;
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if (read_u32le(0x00,sh) != get_streamfile_size(sh))
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goto fail;
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/* 0x04: flags? (0x04/34*/
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/* parse entries */
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{
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int i;
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int entries = read_s32le(0x08,sh); /* may be less than file size, or include dummies (all dummies is possible too) */
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total_subsongs = 0;
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if (target_subsong == 0) target_subsong = 1;
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for (i = 0; i < entries; i++) {
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if (read_u32le(0x0c + 0x10*i, sh) == 0) /* size 0 = empty entry */
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continue;
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total_subsongs++;
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if (total_subsongs == target_subsong && !header_offset) {
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header_offset = 0x0c + 0x10*i;
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}
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}
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if (!header_offset) goto fail;
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if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
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}
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stream_size = read_u32le(header_offset+0x00, sh);
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config = read_u32le(header_offset+0x04, sh); /* volume (0~100), null, null, loop (0/1) */
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start_offset = read_u32le(header_offset+0x08, sh);
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sample_rate = read_u32le(header_offset+0x0c, sh); /* Ace Combat 2 seems to set wrong values but probably their bug */
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loop_flag = (config & 1);
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channels = 1;
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/* rare [Dr. Seuss Cat in the Hat (PS2)] */
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if (loop_flag) {
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/* when loop is set ADPCM has loop flags, but rarely appear too without loop set */
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loop_flag = ps_find_loop_offsets(sf, start_offset, stream_size, channels, 0, &loop_start, &loop_end);
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}
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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_MSB_MSH;
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vgmstream->sample_rate = sample_rate;
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vgmstream->num_samples = ps_bytes_to_samples(stream_size, channels);
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vgmstream->loop_start_sample = loop_start;
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vgmstream->loop_end_sample = loop_end;
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_interleave;
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vgmstream->interleave_block_size = 0x10;
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if (!vgmstream_open_stream(vgmstream, sf, start_offset))
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goto fail;
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close_streamfile(sh);
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return vgmstream;
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fail:
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close_streamfile(sh);
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close_vgmstream(vgmstream);
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return NULL;
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}
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