mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-14 07:32:52 +01:00
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
#include "meta.h"
|
|
#include "../layout/layout.h"
|
|
#include "../util.h"
|
|
|
|
/* .smp file, with MS ADPCM. From Ghostbusters (PC). */
|
|
|
|
VGMSTREAM * init_vgmstream_pc_smp(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
|
|
int channel_count;
|
|
off_t start_offset;
|
|
int interleave;
|
|
|
|
int loop_flag = 0;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("smp",filename_extension(filename))) goto fail;
|
|
|
|
/* 6? */
|
|
if (6 != read_32bitLE(0,streamFile)) goto fail;
|
|
if (0 != read_32bitLE(0x14,streamFile)) goto fail;
|
|
if (4 != read_32bitLE(0x24,streamFile)) goto fail;
|
|
if (4 != read_32bitLE(0x2C,streamFile)) goto fail;
|
|
|
|
start_offset = read_32bitLE(0x1c, streamFile);
|
|
/* check body start + body size = total size */
|
|
if (start_offset + read_32bitLE(0x20,streamFile) != get_streamfile_size(streamFile)) goto fail;
|
|
|
|
/* might also be codec id? */
|
|
channel_count = read_32bitLE(0x28,streamFile);
|
|
if (channel_count != 1 && channel_count != 2) goto fail;
|
|
|
|
/* verify MS ADPCM codec setup */
|
|
{
|
|
int i;
|
|
/* coefficients and statement of 0x100 samples per block?? */
|
|
static const uint8_t ms_setup[0x20] = {
|
|
0x00,0x01,0x07,0x00,0x00,0x01,0x00,0x00,
|
|
0x00,0x02,0x00,0xFF,0x00,0x00,0x00,0x00,
|
|
0xC0,0x00,0x40,0x00,0xF0,0x00,0x00,0x00,
|
|
0xCC,0x01,0x30,0xFF,0x88,0x01,0x18,0xFF};
|
|
|
|
for (i = 0; i < 0x20; i++)
|
|
{
|
|
if ((uint8_t)read_8bit(0x34+i,streamFile) != ms_setup[i]) goto fail;
|
|
}
|
|
|
|
/* verify padding */
|
|
for (i = 0x20; i+0x34 < start_offset; i++)
|
|
{
|
|
if (read_8bit(0x34+i,streamFile) != 0) goto fail;
|
|
}
|
|
}
|
|
|
|
/* build the VGMSTREAM */
|
|
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
/* fill in the vital statistics */
|
|
vgmstream->num_samples = read_32bitLE(0x18,streamFile);
|
|
vgmstream->sample_rate = read_32bitLE(0x30,streamFile);
|
|
|
|
vgmstream->coding_type = coding_MSADPCM;
|
|
vgmstream->layout_type = layout_none; // MS ADPCM does own interleave
|
|
interleave = 0x86*channel_count;
|
|
vgmstream->interleave_block_size = interleave;
|
|
|
|
vgmstream->meta_type = meta_PC_SMP;
|
|
|
|
/* open the file, set up each channel */
|
|
{
|
|
int i;
|
|
|
|
vgmstream->ch[0].streamfile = streamFile->open(streamFile,filename,
|
|
channel_count*interleave*2);
|
|
if (!vgmstream->ch[0].streamfile) goto fail;
|
|
|
|
for (i=0;i<channel_count;i++) {
|
|
vgmstream->ch[i].streamfile = vgmstream->ch[0].streamfile;
|
|
vgmstream->ch[i].offset = vgmstream->ch[i].channel_start_offset =
|
|
start_offset;
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|