115 lines
3.4 KiB
C
115 lines
3.4 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* SSCF - Square-Enix games, older version of .scd [Crisis Core -Final Fantasy VII- (PSP), Dissidia 012 (PSP)] */
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VGMSTREAM* init_vgmstream_sscf(STREAMFILE* sf) {
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VGMSTREAM* vgmstream = NULL;
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uint32_t start_offset, meta_offset, stream_offset, stream_size;
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int loop_flag, channels, sample_rate;
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int total_subsongs, target_subsong = sf->stream_index;
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/* checks */
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if (!is_id32be(0x00,sf, "SSCF"))
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goto fail;
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if (!check_extensions(sf, "scd"))
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goto fail;
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if (!(read_u32be(0x04,sf) == 0x02070210 || /* version? [Crisis Core (PSP)] */
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read_u32be(0x04,sf) == 0x10020702)) /* inverted version? [Dissidia (PSP)] */
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goto fail;
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/* 0x08: file size, except for a few files that with a weird value */
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/* 0x10: file id? */
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/* find total subsongs (entries can be dummy) and target subsong */
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{
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int i,j, is_dupe;
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int entries = read_s32le(0x0c,sf);
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uint32_t stream_offsets[0x800];
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if (entries > 0x800) /* meh */
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goto fail;
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if (target_subsong == 0) target_subsong = 1;
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meta_offset = 0;
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total_subsongs = 0;
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for (i = 0; i < entries; i++) {
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uint32_t entry_offset = 0x20 + (0x20*i);
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uint32_t entry_stream_offset;
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/* skip dummies */
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if (read_u32le(entry_offset+0x08,sf) == 0) /* size 0 */
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continue;
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if (read_u16le(entry_offset+0x0c,sf) == 0) /* no sample rate */
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continue;
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/* skip repeated sounds */
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is_dupe = 0;
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entry_stream_offset = read_u32le(entry_offset+0x04,sf);
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for (j = 0; j < total_subsongs; j++) {
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if (entry_stream_offset == stream_offsets[j]) {
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is_dupe = 1;
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break;
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}
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}
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if (is_dupe)
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continue;
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stream_offsets[total_subsongs] = entry_stream_offset;
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/* ok */
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total_subsongs++;
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if (total_subsongs == target_subsong) {
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meta_offset = entry_offset;
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}
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}
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if (meta_offset == 0)
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goto fail;
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}
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/* 0x00(2): config? usually 0x00/0x01 */
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/* 0x02(2): loop config */ //todo when 1 uses PS-ADPCM uses SPU loop flags to set start/end
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stream_offset = read_u32le(meta_offset+0x04,sf); /* absolute */
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stream_size = read_u32le(meta_offset+0x08,sf);
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sample_rate = read_u16le(meta_offset+0x0c,sf);
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/* 0x0e: config? */
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/* 0x10: config? */
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/* 0x14: 0xCA5F or 0x5FCA */
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/* 0x18: config? */
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/* 0x1c: null / some id? */
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loop_flag = 0;
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channels = 1;
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start_offset = stream_offset;
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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 = sample_rate;
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vgmstream->num_streams = total_subsongs;
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vgmstream->stream_size = stream_size;
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vgmstream->num_samples = ps_bytes_to_samples(stream_size, channels);
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if (loop_flag) {
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vgmstream->loop_start_sample = 0;
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vgmstream->loop_end_sample = vgmstream->num_samples;
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}
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vgmstream->meta_type = meta_SSCF;
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vgmstream->coding_type = coding_PSX;
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vgmstream->layout_type = layout_none;
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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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