mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-24 20:34:51 +01:00
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
#include "ppst_streamfile.h"
|
|
|
|
|
|
/* PPST - ParaPpa STream (maybe), extracted from .img bigfile [Parappa the Rapper (PSP)] */
|
|
VGMSTREAM * init_vgmstream_ppst(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
int total_subsongs, target_subsong = streamFile->stream_index;
|
|
|
|
|
|
/* checks */
|
|
if (!check_extensions(streamFile, "sng"))
|
|
goto fail;
|
|
if (read_32bitBE(0x00,streamFile) != 0x50505354) /* "PPST" */
|
|
goto fail;
|
|
|
|
/* header has some control and comment fields then interleaved RIFF .at3 */
|
|
|
|
/* count subsongs (mainly 4, rarely 1) */
|
|
{
|
|
off_t offset = 0xa0;
|
|
|
|
total_subsongs = 0;
|
|
while (offset < 0x800) {
|
|
if (read_32bitLE(offset + 0x04, streamFile) == 0) /* subsong size */
|
|
break;
|
|
total_subsongs++;
|
|
offset += 0x08;
|
|
}
|
|
|
|
if (target_subsong == 0) target_subsong = 1;
|
|
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
|
|
}
|
|
|
|
{
|
|
off_t start_offset = 0x800;
|
|
size_t interleave_size = 0x4000;
|
|
size_t stride_size = 0x4000*total_subsongs;
|
|
/* subsong header at 0xa0, 0x00(1): id, 0x01(3): blocks of interleave */
|
|
size_t stream_size = read_32bitLE(0xA0+0x08*(target_subsong-1)+0x04, streamFile);
|
|
|
|
STREAMFILE* temp_streamFile = setup_ppst_streamfile(streamFile, start_offset+interleave_size*(target_subsong-1), interleave_size, stride_size, stream_size);
|
|
if (!temp_streamFile) goto fail;
|
|
|
|
vgmstream = init_vgmstream_riff(temp_streamFile);
|
|
close_streamfile(temp_streamFile);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->num_streams = total_subsongs;
|
|
vgmstream->stream_size = stream_size;
|
|
vgmstream->meta_type = meta_PPST;
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|