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#include "meta.h"
#include "../util.h"
/* SNG (from Excite Truck [WII]) */
VGMSTREAM * init_vgmstream_wii_sng(STREAMFILE *streamFile) {
VGMSTREAM * vgmstream = NULL;
char filename[260];
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;
}
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