mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 04:14:50 +01:00
78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
|
|
/* MTAF - found in Metal Gear Solid 3: Snake Eater (PS2), Subsistence and HD too */
|
|
VGMSTREAM * init_vgmstream_mtaf(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
off_t start_offset;
|
|
int loop_flag, channel_count;
|
|
int32_t loop_start, loop_end;
|
|
|
|
|
|
/* checks */
|
|
if ( !check_extensions(streamFile,"mtaf"))
|
|
goto fail;
|
|
if (read_32bitBE(0x00, streamFile) != 0x4d544146) /* "MTAF" */
|
|
goto fail;
|
|
/* 0x04(4): pseudo file size (close but smaller) */
|
|
/* 0x08(4): version? (0), 0x0c(20): null, 0x30(32): some kind of id or config? */
|
|
|
|
|
|
/* HEAD chunk */
|
|
if (read_32bitBE(0x40, streamFile) != 0x48454144) /* "HEAD" */
|
|
goto fail;
|
|
if (read_32bitLE(0x44, streamFile) != 0xB0) /* HEAD size */
|
|
goto fail;
|
|
|
|
|
|
/* 0x48(4): null, 0x4c: usually channel count (sometimes 0x10 with 2ch), 0x50(4): 0x7F (vol?), 0x54(2): 0x40 (pan?) */
|
|
channel_count = 2 * read_8bit(0x61, streamFile); /* 0x60(4): full block size (0x110 * channels), but this works */
|
|
/* 0x70(4): ? (00/05/07), 0x80 .. 0xf8: null */
|
|
|
|
loop_start = read_32bitLE(0x58, streamFile);
|
|
loop_end = read_32bitLE(0x5c, streamFile);
|
|
loop_flag = read_32bitLE(0x70, streamFile) & 1;
|
|
|
|
/* check loop points vs frame counts */
|
|
if (loop_start/0x100 != read_32bitLE(0x64, streamFile) ||
|
|
loop_end /0x100 != read_32bitLE(0x68, streamFile) ) {
|
|
VGM_LOG("MTAF: wrong loop points\n");
|
|
goto fail;
|
|
}
|
|
|
|
/* TRKP chunks (x16) */
|
|
/* just seem to contain pan/vol stuff (0x7f/0x40), one TRKP with data per channel and the rest fixed values */
|
|
|
|
/* DATA chunk */
|
|
if (read_32bitBE(0x7f8, streamFile) != 0x44415441) /* "DATA" */
|
|
goto fail;
|
|
/* 0x7fc: data size (without blocks in case of blocked layout) */
|
|
|
|
start_offset = 0x800;
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->sample_rate = 48000; /* always */
|
|
vgmstream->num_samples = loop_end;
|
|
vgmstream->loop_start_sample = loop_start;
|
|
vgmstream->loop_end_sample = loop_end;
|
|
|
|
vgmstream->coding_type = coding_MTAF;
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = 0x110 / 2; /* kinda hacky for MTAF (stereo codec) track layout */
|
|
vgmstream->meta_type = meta_MTAF;
|
|
|
|
if ( !vgmstream_open_stream(vgmstream, streamFile, start_offset) )
|
|
goto fail;
|
|
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|