mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 09:55:53 +01:00
85 lines
3.1 KiB
C
85 lines
3.1 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 *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, 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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* .2psf: header id? (Mahoromatic) */
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if (!check_extensions(streamFile, "sap,2psf"))
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goto fail;
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if (read_32bitBE(0x00,streamFile) != 0x32504653) /* "2PFS" */
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goto fail;
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version = read_16bitLE(0x04,streamFile);
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if (version != 0x01 && version != 0x02) /* v1: Mahoromatic, v2: Gantz */
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goto fail;
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channel_count = read_8bit(0x40,streamFile);
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loop_flag = read_8bit(0x41,streamFile);
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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(channel_count,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_32bitLE(0x34,streamFile) * 28 / 16 / channel_count;
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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_32bitLE(0x44,streamFile);
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loop_start_adjust = read_16bitLE(0x42,streamFile);
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loop_start_block = read_32bitLE(0x48,streamFile);
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loop_end_block = read_32bitLE(0x4c,streamFile);
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}
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else {
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vgmstream->sample_rate = read_32bitLE(0x48,streamFile);
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loop_start_adjust = read_32bitLE(0x44,streamFile);
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loop_start_block = read_32bitLE(0x50,streamFile);
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loop_end_block = read_32bitLE(0x54,streamFile);
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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 * channel_count * interleave, channel_count)
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+ ps_bytes_to_samples(loop_start_adjust * channel_count, channel_count);
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vgmstream->loop_end_sample =
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ps_bytes_to_samples(loop_end_block * channel_count * interleave, channel_count)
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+ ps_bytes_to_samples(loop_end_adjust * channel_count, channel_count);
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}
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if (!vgmstream_open_stream(vgmstream,streamFile,start_offset))
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goto fail;
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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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