mirror of
https://github.com/vgmstream/vgmstream.git
synced 2024-12-22 03:15:54 +01:00
126 lines
4.0 KiB
C
126 lines
4.0 KiB
C
#include "meta.h"
|
|
#include "../util.h"
|
|
|
|
/* SNG (from Excite Truck [WII]) */
|
|
VGMSTREAM * init_vgmstream_wii_sng(STREAMFILE *streamFile) {
|
|
VGMSTREAM * vgmstream = NULL;
|
|
char filename[PATH_LIMIT];
|
|
off_t start_offset;
|
|
int i;
|
|
int loop_flag;
|
|
int channel_count;
|
|
int coef1;
|
|
int coef2;
|
|
int first_block_len;
|
|
int second_channel_start;
|
|
int dataBuffer = 0;
|
|
int Founddata = 0;
|
|
size_t file_size;
|
|
off_t current_chunk;
|
|
|
|
/* check extension, case insensitive */
|
|
streamFile->get_name(streamFile,filename,sizeof(filename));
|
|
if (strcasecmp("sng",filename_extension(filename))) goto fail;
|
|
|
|
/* check header */
|
|
if (read_32bitBE(0x00,streamFile) != 0x30545352) /* "0STR" */
|
|
goto fail;
|
|
if (read_32bitBE(0x04,streamFile) != 0x34000000) /* 0x34000000 */
|
|
goto fail;
|
|
if (read_32bitBE(0x08,streamFile) != 0x08000000) /* 0x08000000" */
|
|
goto fail;
|
|
if (read_32bitBE(0x0C,streamFile) != 0x01000000) /* 0x01000000 */
|
|
goto fail;
|
|
if (read_32bitLE(0x10,streamFile) != (get_streamfile_size(streamFile)))
|
|
goto fail;
|
|
|
|
loop_flag = (read_32bitLE(0x130,streamFile) !=0); /* not sure */
|
|
channel_count = 2;
|
|
|
|
/* build the VGMSTREAM */
|
|
vgmstream = allocate_vgmstream(channel_count,loop_flag);
|
|
if (!vgmstream) goto fail;
|
|
|
|
/* fill in the vital statistics */
|
|
start_offset = 0x180;
|
|
vgmstream->channels = channel_count;
|
|
vgmstream->sample_rate = read_32bitLE(0x110,streamFile);
|
|
vgmstream->coding_type = coding_NGC_DSP;
|
|
vgmstream->num_samples = read_32bitLE(0x100,streamFile)/16*14*2;
|
|
if (loop_flag) {
|
|
vgmstream->loop_start_sample = read_32bitBE(0x130,streamFile)/16*14;
|
|
vgmstream->loop_end_sample = read_32bitBE(0x134,streamFile)/16*14;
|
|
}
|
|
|
|
vgmstream->layout_type = layout_none;
|
|
vgmstream->meta_type = meta_WII_SNG;
|
|
|
|
|
|
/* scan file until we find a "data" string */
|
|
first_block_len = read_32bitLE(0x100,streamFile);
|
|
file_size = get_streamfile_size(streamFile);
|
|
{
|
|
current_chunk = first_block_len;
|
|
/* Start at 0 and loop until we reached the
|
|
file size, or until we found a "data string */
|
|
while (!Founddata && current_chunk < file_size) {
|
|
dataBuffer = (read_32bitLE(current_chunk,streamFile));
|
|
if (dataBuffer == first_block_len) { /* The value from the first block length */
|
|
/* if "data" string found, retrieve the needed infos */
|
|
Founddata = 1;
|
|
second_channel_start = current_chunk+0x80;
|
|
/* We will cancel the search here if we have a match */
|
|
break;
|
|
}
|
|
/* else we will increase the search offset by 1 */
|
|
current_chunk = current_chunk + 1;
|
|
}
|
|
}
|
|
|
|
coef1 = 0x13C;
|
|
if (Founddata == 0) {
|
|
goto fail;
|
|
} else if (Founddata == 1) {
|
|
coef2 = current_chunk+0x3C;
|
|
}
|
|
|
|
|
|
for (i=0;i<16;i++)
|
|
vgmstream->ch[0].adpcm_coef[i] = read_16bitBE(coef1+i*2,streamFile);
|
|
if (channel_count == 2) {
|
|
for (i=0;i<16;i++)
|
|
vgmstream->ch[1].adpcm_coef[i] = read_16bitBE(coef2+i*2,streamFile);
|
|
}
|
|
|
|
/* open the file for reading */
|
|
{
|
|
STREAMFILE * file;
|
|
file = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
|
|
if (!file) goto fail;
|
|
for (i=0;i<channel_count;i++) {
|
|
vgmstream->ch[i].streamfile = file;
|
|
|
|
/* The first channel */
|
|
vgmstream->ch[0].channel_start_offset=
|
|
vgmstream->ch[0].offset=start_offset;
|
|
|
|
/* The second channel */
|
|
if (channel_count == 2) {
|
|
vgmstream->ch[1].streamfile = streamFile->open(streamFile,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
|
|
|
|
if (!vgmstream->ch[1].streamfile) goto fail;
|
|
|
|
vgmstream->ch[i].channel_start_offset=
|
|
vgmstream->ch[1].offset=second_channel_start;
|
|
}
|
|
}
|
|
}
|
|
|
|
return vgmstream;
|
|
|
|
/* clean up anything we may have opened */
|
|
fail:
|
|
if (vgmstream) close_vgmstream(vgmstream);
|
|
return NULL;
|
|
}
|