mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-23 20:04:50 +01:00
85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
#include "meta.h"
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#include "../coding/coding.h"
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/* 2PFS - from Konami Games [Mahoromatic: Moetto - KiraKira Maid-San (PS2), GANTZ The Game (PS2)] */
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VGMSTREAM* init_vgmstream_ps2_2pfs(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, version, interleave;
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int loop_start_block, loop_end_block; /* block number */
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int loop_start_adjust, loop_end_adjust; /* loops start/end a few samples into the start/end block */
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/* checks */
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/* .sap: standard
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* .2pfs: header id? (Mahoromatic) */
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if (!check_extensions(sf, "sap,2pfs"))
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goto fail;
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if (read_u32be(0x00,sf) != 0x32504653) /* "2PFS" */
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goto fail;
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version = read_u16le(0x04,sf);
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if (version != 0x01 && version != 0x02) /* v1: Mahoromatic, v2: Gantz */
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goto fail;
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channels = read_u8(0x40,sf);
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loop_flag = read_u8(0x41,sf);
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start_offset = 0x800;
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interleave = 0x1000;
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/* other header values
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* 0x06: unknown, v1=0x0004 v2=0x0001
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* 0x08: unique file id
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* 0x0c: base header size (v1=0x50, v2=0x60) + datasize (without the 0x800 full header size)
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* 0x10-0x30: unknown (v1 differs from v2)
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* 0x38-0x40: unknown (v1 same as v2)
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* 0x4c: unknown, some kind of total samples? (v2 only)
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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_PS2_2PFS;
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vgmstream->num_samples = read_u32le(0x34,sf) * 28 / 16 / channels;
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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 = interleave;
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if (version == 0x01) {
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vgmstream->sample_rate = read_u32le(0x44,sf);
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loop_start_adjust = read_u16le(0x42,sf);
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loop_start_block = read_u32le(0x48,sf);
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loop_end_block = read_u32le(0x4c,sf);
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}
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else {
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vgmstream->sample_rate = read_u32le(0x48,sf);
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loop_start_adjust = read_u32le(0x44,sf);
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loop_start_block = read_u32le(0x50,sf);
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loop_end_block = read_u32le(0x54,sf);
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}
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loop_end_adjust = interleave; /* loops end after all samples in the end_block AFAIK */
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if (loop_flag) {
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/* block to offset > offset to sample + adjust (number of frames into the block) */
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vgmstream->loop_start_sample =
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ps_bytes_to_samples(loop_start_block * channels * interleave, channels)
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+ ps_bytes_to_samples(loop_start_adjust * channels, channels);
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vgmstream->loop_end_sample =
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ps_bytes_to_samples(loop_end_block * channels * interleave, channels)
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+ ps_bytes_to_samples(loop_end_adjust * channels, channels);
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}
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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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