92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
#include "meta.h"
|
|
#include "../coding/coding.h"
|
|
|
|
|
|
static int check_subinterleave(STREAMFILE* sf, uint32_t start_offset);
|
|
|
|
/* GCub - found in Black Box/Shaba games (engine?) [Sega Soccer Slam (GC), Shrek the Third (CC), Shrek Superslam (GC)] */
|
|
VGMSTREAM* init_vgmstream_gcub(STREAMFILE* sf) {
|
|
VGMSTREAM* vgmstream = NULL;
|
|
uint32_t start_offset, data_size;
|
|
int channels, loop_flag, sample_rate;
|
|
int is_subinterleave;
|
|
|
|
|
|
/* checks */
|
|
if (!is_id32be(0x00,sf, "GCub"))
|
|
goto fail;
|
|
|
|
/* .wav: extension found in bigfile
|
|
* .gcub: header id */
|
|
if (!check_extensions(sf, "wav,lwav,gcub"))
|
|
goto fail;
|
|
|
|
loop_flag = 0;
|
|
channels = read_u32be(0x04,sf);
|
|
sample_rate = read_u32be(0x08,sf);
|
|
data_size = read_u32be(0x0c,sf);
|
|
|
|
if (is_id32be(0x60,sf, "GCxx")) /* seen in sfx */
|
|
start_offset = 0x88;
|
|
else
|
|
start_offset = 0x60;
|
|
|
|
/* Shaba/Shrek games use it but no header diffs, detect by inspecting data
|
|
* (could try checking initial PS but not enough for files that start with 0s) */
|
|
is_subinterleave = 0;
|
|
if (channels > 1)
|
|
is_subinterleave = check_subinterleave(sf, start_offset);
|
|
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channels, loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
vgmstream->meta_type = meta_GCUB;
|
|
vgmstream->sample_rate = sample_rate;
|
|
vgmstream->num_samples = dsp_bytes_to_samples(data_size, channels);
|
|
vgmstream->coding_type = is_subinterleave ? coding_NGC_DSP_subint : coding_NGC_DSP;
|
|
vgmstream->layout_type = is_subinterleave ? layout_none : layout_interleave;
|
|
vgmstream->interleave_block_size = is_subinterleave ? 0x01 : 0x8000;
|
|
|
|
dsp_read_coefs_be(vgmstream, sf, 0x10, 0x20);
|
|
/* 0x50: initial ps for ch1/2 (16b) */
|
|
/* 0x54: hist? (always blank) */
|
|
|
|
if (!vgmstream_open_stream(vgmstream, sf, start_offset))
|
|
goto fail;
|
|
return vgmstream;
|
|
|
|
fail:
|
|
close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
static int check_subinterleave(STREAMFILE* sf, uint32_t offset) {
|
|
int test_frames = 50;
|
|
uint32_t size = get_streamfile_size(sf);
|
|
|
|
/* DSP frame headers can't go past certain values, while nibbles can, so check that supposed headers are so */
|
|
while (test_frames >= 0 && offset < size) {
|
|
uint8_t h2 = read_u8(offset + 0x01,sf); /* only need to test header for 2nd channel */
|
|
|
|
/* ignore blank frames */
|
|
if (h2 != 0x00) {
|
|
uint8_t factor = (h2 >> 0) & 0xF; /* not sure about actual max but 0x0b is max usually */
|
|
uint8_t index = (h2 >> 4) & 0xF;
|
|
|
|
if (factor > 0x0c || index > 8)
|
|
return 0;
|
|
test_frames--;
|
|
}
|
|
|
|
offset += 0x10;
|
|
}
|
|
|
|
/* too many blanks */
|
|
if (test_frames > 0)
|
|
return 0;
|
|
|
|
return 1;
|
|
} |