mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-19 09:55:53 +01:00
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* STRM - common Nintendo NDS streaming format */
|
|
VGMSTREAM* init_vgmstream_nds_strm(STREAMFILE* sf) {
|
|
VGMSTREAM* vgmstream = NULL;
|
|
off_t start_offset;
|
|
int channels, loop_flag, codec, sample_rate;
|
|
|
|
|
|
/* checks */
|
|
if (!is_id32be(0x00,sf, "STRM"))
|
|
goto fail;
|
|
|
|
if (!check_extensions(sf, "strm"))
|
|
goto fail;
|
|
|
|
/* BOM check? */
|
|
if (read_u32be(0x04,sf) != 0xFFFE0001 &&
|
|
read_u32be(0x04,sf) != 0xFEFF0001) /* newer games? */
|
|
goto fail;
|
|
|
|
if (!is_id32be(0x10,sf, "HEAD") &&
|
|
read_u32le(0x14,sf) != 0x50)
|
|
goto fail;
|
|
|
|
codec = read_u8(0x18,sf);
|
|
loop_flag = read_u8(0x19,sf);
|
|
sample_rate = read_u16le(0x1c,sf);
|
|
channels = read_u8(0x1a,sf);
|
|
if (channels > 2) goto fail;
|
|
|
|
start_offset = read_u32le(0x28,sf);
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channels, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = read_32bitLE(0x24,sf);
|
|
vgmstream->loop_start_sample = read_32bitLE(0x20,sf);
|
|
vgmstream->loop_end_sample = vgmstream->num_samples;
|
|
|
|
vgmstream->meta_type = meta_STRM;
|
|
|
|
switch (codec) {
|
|
case 0x00: /* [Bleach - Dark Souls (DS)] */
|
|
vgmstream->coding_type = coding_PCM8;
|
|
break;
|
|
case 0x01:
|
|
vgmstream->coding_type = coding_PCM16LE;
|
|
break;
|
|
case 0x02: /* [SaGa 2 (DS)] */
|
|
vgmstream->coding_type = coding_NDS_IMA;
|
|
break;
|
|
default:
|
|
goto fail;
|
|
}
|
|
vgmstream->layout_type = layout_interleave;
|
|
vgmstream->interleave_block_size = read_32bitLE(0x30,sf);
|
|
vgmstream->interleave_last_block_size = read_32bitLE(0x38,sf);
|
|
|
|
|
|
if (!vgmstream_open_stream(vgmstream, sf, start_offset))
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|