vgmstream/src/meta/rwsd.c

131 lines
4.0 KiB
C

#include "meta.h"
#include "../coding/coding.h"
#include "../util.h"
/* RWSD is quite similar to BRSTM, but can contain several streams.
* Still, some games use it for single streams. We only support the single stream form here */
//TODO this meta is a hack as WSD is just note info, and data offsets are elsewhere,
// while this assumes whatever data follows RWSD must belong to it; rework for Wii Sports
VGMSTREAM* init_vgmstream_rwsd(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
size_t wave_length;
int codec, channels, loop_flag;
size_t stream_size;
off_t start_offset, wave_offset = 0, labl_offset;
if (!is_id32be(0x00, sf, "RWSD"))
goto fail;
if (!check_extensions(sf, "brwsd,rwsd"))
goto fail;
/* check header */
switch (read_u32be(0x04, sf)) {
case 0xFEFF0102:
/* ideally we would look through the chunk list for a WAVE chunk,
* but it's always in the same order */
/* get WAVE offset, check */
wave_offset = read_32bitBE(0x18,sf);
if (!is_id32be(wave_offset + 0x00, sf, "WAVE"))
goto fail;
/* get WAVE size, check */
wave_length = read_32bitBE(0x1c,sf);
if (read_32bitBE(wave_offset + 0x04,sf) != wave_length)
goto fail;
/* check wave count */
if (read_32bitBE(wave_offset + 0x08,sf) != 1)
goto fail; /* only support 1 */
break;
case 0xFEFF0103: /* followed by RWAR, extract that or use .txth subfile */
goto fail;
}
/* get type details */
codec = read_u8(wave_offset+0x10,sf);
loop_flag = read_u8(wave_offset+0x11,sf);
channels = read_u8(wave_offset+0x12,sf);
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channels, loop_flag);
if (!vgmstream) goto fail;
vgmstream->num_samples = dsp_nibbles_to_samples(read_32bitBE(wave_offset+0x1c,sf));
vgmstream->loop_start_sample = dsp_nibbles_to_samples(read_32bitBE(wave_offset+0x18,sf));
vgmstream->sample_rate = (uint16_t)read_16bitBE(wave_offset + 0x14,sf);
vgmstream->loop_end_sample = vgmstream->num_samples;
switch (codec) {
case 0:
vgmstream->coding_type = coding_PCM8;
break;
case 1:
vgmstream->coding_type = coding_PCM16BE;
break;
case 2:
vgmstream->coding_type = coding_NGC_DSP;
break;
default:
goto fail;
}
vgmstream->layout_type = layout_none;
vgmstream->meta_type = meta_RWSD;
{
off_t codec_info_offset;
int i, j;
for (j = 0 ; j < vgmstream->channels; j++) {
// dummy for RWSD, must be a proper way to work this out
codec_info_offset = wave_offset + 0x6c + j*0x30;
if (vgmstream->coding_type == coding_NGC_DSP) {
for (i = 0; i < 16; i++) {
vgmstream->ch[j].adpcm_coef[i] = read_16bitBE(codec_info_offset + i*0x2, sf);
}
}
}
}
/* this is just data size and following data may or may not be from this RWSD */
start_offset = read_32bitBE(0x08, sf);
if (is_id32be(start_offset, sf, "LABL")) {
labl_offset = start_offset;
start_offset += read_32bitBE(start_offset + 0x04, sf);
read_string(vgmstream->stream_name, 0x28, labl_offset + 0x18, sf);
}
stream_size = read_32bitBE(wave_offset + 0x50,sf);
/* open the file for reading by each channel */
{
int i;
char filename[PATH_LIMIT];
sf->get_name(sf,filename,sizeof(filename));
for (i = 0; i < channels; i++) {
vgmstream->ch[i].streamfile = sf->open(sf,filename,STREAMFILE_DEFAULT_BUFFER_SIZE);
if (!vgmstream->ch[i].streamfile) goto fail;
vgmstream->ch[i].channel_start_offset = vgmstream->ch[i].offset =
start_offset + i*stream_size;
}
}
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}