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vgmstream/src/meta/isb.c

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C
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#include "meta.h"
#include "../coding/coding.h"
/* .ISB - Creative ISACT (Interactive Spatial Audio Composition Tools) middleware [Psychonauts (PC), Mass Effect (multi)] */
VGMSTREAM* init_vgmstream_isb(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
off_t start_offset = 0, name_offset = 0, nfld_offset = 0;
size_t stream_size = 0, name_size = 0, nfld_size = 0;
int loop_flag = 0, channels = 0, sample_rate = 0, codec = 0, pcm_bytes = 0, bps = 0;
int total_subsongs, target_subsong = sf->stream_index;
uint32_t (*read_u32me)(off_t,STREAMFILE*);
uint32_t (*read_u32ce)(off_t,STREAMFILE*);
int big_endian;
/* checks */
if (!check_extensions(sf, "isb"))
goto fail;
big_endian = read_u32be(0x00,sf) == get_id32be("FFIR"); /* PS3, most X360 */
read_u32me = big_endian ? read_u32be : read_u32le; /* machine endianness... */
read_u32ce = big_endian ? read_u32le : read_u32be; /* chunks change with endianness but this just reads as BE */
if (read_u32ce(0x00,sf) != get_id32be("RIFF"))
goto fail;
if (read_u32me(0x04,sf) + 0x08 != get_streamfile_size(sf))
goto fail;
if (read_u32ce(0x08,sf) != get_id32be("isbf"))
goto fail;
/* some files have a companion .icb, seems to be a cue file pointing here */
/* format is RIFF with many custom chunks, apparently for their DAW-like editor with
* complex functions, but most seem always included by default and unused, and games
* seems to use the format as a simple audio bank. Psychonauts Xbox/PS2 doesn't use ISACT. */
{
off_t offset, max_offset, header_offset = 0, suboffset, submax_offset;
size_t header_size = 0;
total_subsongs = 0; /* not specified */
if (target_subsong == 0) target_subsong = 1;
/* parse base RIFF */
offset = 0x0c;
max_offset = get_streamfile_size(sf);
while (offset < max_offset) {
uint32_t chunk_type = read_u32ce(offset + 0x00,sf);
uint32_t chunk_size = read_u32me(offset + 0x04,sf);
offset += 0x08;
switch(chunk_type) {
case 0x4C495354: /* "LIST" */
if (read_u32ce(offset, sf) == get_id32be("samp")) {
/* sample header */
total_subsongs++;
if (target_subsong == total_subsongs && header_offset == 0) {
header_offset = offset;
header_size = chunk_size;
}
}
else if (read_u32ce(offset, sf) == get_id32be("fldr")) {
/* subfolder with another LIST inside, for example "stingers" > N smpl (seen in some music_bank) */
off_t current_nfld_offset = 0;
size_t current_nfld_size = 0;
suboffset = offset + 0x04;
submax_offset = offset + chunk_size;
while (suboffset < submax_offset) {
uint32_t subchunk_type = read_u32ce(suboffset + 0x00,sf);
uint32_t subchunk_size = read_u32me(suboffset + 0x04,sf);
suboffset += 0x08;
if (subchunk_type == get_id32be("titl")) {
/* should go first in fldr*/
current_nfld_offset = suboffset;
current_nfld_size = subchunk_size;
}
else if (subchunk_type == get_id32be("LIST")) {
uint32_t subsubchunk_type = read_u32ce(suboffset, sf);
if (subsubchunk_type == get_id32be("samp")) {
total_subsongs++;
if (target_subsong == total_subsongs && header_offset == 0) {
header_offset = suboffset;
header_size = chunk_size;
nfld_offset = current_nfld_offset;
nfld_size = current_nfld_size;
}
}
else if (subsubchunk_type == get_id32be("fldr")) {
VGM_LOG("ISB: subfolder with subfolder at %lx\n", suboffset);
goto fail;
}
//break; /* there can be N subLIST+samps */
}
suboffset += subchunk_size;
}
}
break;
default: /* most are common chunks at the start that seem to contain defaults */
break;
}
offset += chunk_size; /* no chunk 1-byte padding */
}
if (target_subsong < 0 || target_subsong > total_subsongs || total_subsongs < 1) goto fail;
if (header_offset == 0) goto fail;
/* parse header inside LIST */
offset = header_offset + 0x04;
max_offset = offset + header_size;
while (offset < max_offset) {
uint32_t chunk_type = read_u32ce(offset + 0x00,sf);
uint32_t chunk_size = read_u32me(offset + 0x04,sf);
offset += 0x08;
switch(chunk_type) {
case 0x7469746C: /* "titl" */
name_offset = offset;
name_size = chunk_size;
break;
case 0x63686E6B: /* "chnk" */
channels = read_u32me(offset + 0x00, sf);
break;
case 0x73696E66: /* "sinf" */
/* 0x00: null? */
/* 0x04: some value? */
sample_rate = read_u32me(offset + 0x08, sf);
pcm_bytes = read_u32me(offset + 0x0c, sf);
bps = read_u16le(offset + 0x10, sf);
/* 0x12: some value? */
break;
case 0x636D7069: /* "cmpi" */
codec = read_u32me(offset + 0x00, sf);
if (read_u32me(offset + 0x04, sf) != codec) {
VGM_LOG("ISB: unknown compression repeat\n");
goto fail;
}
/* 0x08: extra value for some codecs? */
/* 0x0c: block size when codec is XBOX-IMA */
/* 0x10: null? */
/* 0x14: flags? */
break;
case 0x64617461: /* "data" */
start_offset = offset;
stream_size = chunk_size;
break;
default: /* most of the same default chunks */
break;
}
offset += chunk_size;
}
if (start_offset == 0)
goto fail;
}
/* some files are marked with "loop" but have value 0? */
loop_flag = 0;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(channels, loop_flag);
if (!vgmstream) goto fail;
vgmstream->meta_type = meta_ISB;
vgmstream->sample_rate = sample_rate;
vgmstream->num_streams = total_subsongs;
vgmstream->stream_size = stream_size;
if (name_offset) {
/* UTF16 but only uses lower bytes */
char name[256];
char nfld[256];
/* should read string or set '\0' is no size is set/incorrect */
if (name_size >= sizeof(name))
name_size = sizeof(name) - 1;
read_string_utf16(name, name_size, name_offset, sf, big_endian);
if (nfld_size >= sizeof(nfld))
nfld_size = sizeof(nfld) - 1;
read_string_utf16(nfld, nfld_size, nfld_offset, sf, big_endian);
if (nfld[0] && name[0]) {
snprintf(vgmstream->stream_name,STREAM_NAME_SIZE, "%s/%s", nfld, name);
}
else if (name[0]) {
snprintf(vgmstream->stream_name,STREAM_NAME_SIZE, "%s", name);
}
/* there is also a "titl" for the bank, but it's just the filename so probably unwanted */
}
switch(codec) {
case 0x00:
if (bps == 8) {
vgmstream->coding_type = coding_PCM8_U;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x01;
}
else {
vgmstream->coding_type = coding_PCM16LE;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x02;
}
vgmstream->num_samples = pcm_bytes_to_samples(stream_size, channels, bps); /* unsure about pcm_bytes */
break;
case 0x01:
vgmstream->coding_type = coding_XBOX_IMA;
vgmstream->layout_type = layout_none;
vgmstream->num_samples = xbox_ima_bytes_to_samples(stream_size, channels); /* pcm_bytes has excess data */
break;
#ifdef VGM_USE_VORBIS
case 0x02:
vgmstream->codec_data = init_ogg_vorbis(sf, start_offset, stream_size, NULL);
if (!vgmstream->codec_data) goto fail;
vgmstream->coding_type = coding_OGG_VORBIS;
vgmstream->layout_type = layout_none;
vgmstream->num_samples = pcm_bytes / channels / (bps/8);
break;
#endif
#ifdef VGM_USE_FFMPEG
case 0x04: {
uint8_t buf[0x100];
size_t bytes;
off_t fmt_offset = start_offset;
size_t fmt_size = 0x20;
start_offset += fmt_size;
stream_size -= fmt_size;
/* XMA1 "fmt" chunk (BE, unlike the usual LE) */
bytes = ffmpeg_make_riff_xma_from_fmt_chunk(buf,sizeof(buf), fmt_offset,fmt_size, stream_size, sf, 1);
vgmstream->codec_data = init_ffmpeg_header_offset(sf, buf,bytes, start_offset, stream_size);
if (!vgmstream->codec_data) goto fail;
vgmstream->coding_type = coding_FFmpeg;
vgmstream->layout_type = layout_none;
vgmstream->num_samples = pcm_bytes / channels / (bps/8);
xma_fix_raw_samples(vgmstream, sf, start_offset, stream_size, fmt_offset, 1,1);
break;
}
#endif
case 0x05: {
//TODO: improve
VGMSTREAM *temp_vgmstream = NULL;
STREAMFILE *temp_sf = NULL;
temp_sf = setup_subfile_streamfile(sf, start_offset, stream_size, "msf");
if (!temp_sf) goto fail;
temp_vgmstream = init_vgmstream_msf(temp_sf);
if (temp_vgmstream) {
temp_vgmstream->num_streams = vgmstream->num_streams;
temp_vgmstream->stream_size = vgmstream->stream_size;
temp_vgmstream->meta_type = vgmstream->meta_type;
strcpy(temp_vgmstream->stream_name, vgmstream->stream_name);
close_streamfile(temp_sf);
close_vgmstream(vgmstream);
return temp_vgmstream;
}
else {
close_streamfile(temp_sf);
goto fail;
}
break;
}
default: /* according to press releases ISACT may support WMA */
VGM_LOG("ISB: unknown codec %i\n", codec);
goto fail;
}
if (!vgmstream_open_stream(vgmstream, sf, start_offset))
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}
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