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vgmstream/src/meta/sab.c

277 lines
8.9 KiB
C
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#include "meta.h"
#include "../coding/coding.h"
#include "../layout/layout.h"
#include "sab_streamfile.h"
typedef struct {
int total_subsongs;
int target_subsong;
int is_stream;
int is_extra;
uint32_t flags;
uint32_t sound_count;
uint32_t block_size;
uint32_t codec;
int loop_flag;
int channel_count;
int sample_rate;
uint32_t stream_size;
int32_t loop_start;
int32_t loop_end;
off_t stream_offset;
} sab_header;
static int parse_sab(STREAMFILE* sf, sab_header* sab);
static VGMSTREAM* build_layered_vgmstream(STREAMFILE* sf, sab_header* sab);
static void get_stream_name(char* stream_name, STREAMFILE* sf, int target_stream);
/* SAB - from Sensaura GameCODA middleware games [Men of Valor (multi), Worms 4: Mayhem (multi), Just Cause (multi)] */
VGMSTREAM* init_vgmstream_sab(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
sab_header sab = {0};
/* .sab: main, .sob: cue (has config/names) */
if (!check_extensions(sf,"sab"))
goto fail;
if (read_u32be(0x00,sf) != 0x43535732 && /* "CSW2" (Windows) */
read_u32be(0x00,sf) != 0x43535032 && /* "CSP2" (PS2) */
read_u32be(0x00,sf) != 0x43535832) /* "CSX2" (Xbox) */
goto fail;
if (!parse_sab(sf, &sab))
goto fail;
/* sab can be (both cases handled here):
* - bank: multiple subsongs (each a different header)
* - stream: layers used as different stereo tracks (Men of Valor) or mono tracks to create stereo (Worms 4)
*/
vgmstream = build_layered_vgmstream(sf, &sab);
if (!vgmstream) goto fail;
vgmstream->num_streams = sab.total_subsongs;
get_stream_name(vgmstream->stream_name, sf, sab.target_subsong);
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}
//todo doesn't seem correct always (also multiple .sob may share .sab)
/* multiple streams may share a name */
static void get_stream_name(char* stream_name, STREAMFILE* sf, int target_stream) {
STREAMFILE* sf_info = NULL;
int i, j, total_cues, num_cue = -1;
size_t name_size = 0;
off_t name_offset = 0x10;
sf_info = open_streamfile_by_ext(sf, "sob");
if (!sf_info) goto end;
if (read_u32be(0x00,sf_info) != 0x43544632) /* "CTF2" */
goto end;
total_cues = read_u32le(0x08,sf_info);
if (total_cues > 0x1000)
goto end;
for (i = 0; i < total_cues; i++) {
uint32_t flags, num_subsections, subsection_1_size, subsection_2_size;
flags = read_u32le(name_offset + 0x00,sf_info);
num_subsections = read_u32le(name_offset + 0x20,sf_info);
subsection_1_size = (flags & 0x00000001) ? 0x40 : 0x00;
subsection_1_size +=(flags & 0x00000040) ? 0x20 : 0x00;
subsection_2_size = (flags & 0x00000100) ? 0x1c : 0x10; //todo not always correct
if (num_subsections > 0x1000)
goto end; /* bad read */
for (j = 0; j < num_subsections; j++) {
int num_stream = read_u32le(name_offset + 0x2c + subsection_1_size + j*subsection_2_size + 0x08,sf_info);
if (target_stream - 1 == num_stream)
num_cue = i;
}
name_offset += 0x2c + subsection_1_size + subsection_2_size * num_subsections;
}
if (num_cue < 0)
goto end;
for (i = 0; i < total_cues; i++) {
/* 0x00: id */
name_size = read_u32le(name_offset + 0x04,sf_info); /* non null-terminated */
if (i == num_cue) {
name_offset += 0x08;
break;
}
name_offset += 0x08 + name_size;
}
if (name_size > STREAM_NAME_SIZE - 1)
name_size = STREAM_NAME_SIZE - 1;
read_string(stream_name,name_size+1, name_offset,sf_info);
end:
close_streamfile(sf_info);
}
static int parse_sab(STREAMFILE* sf, sab_header* sab) {
off_t entry_offset;
sab->flags = read_u32le(0x04,sf); /* upper byte is always 0x02 (version?) */
sab->sound_count = read_u32le(0x08,sf);
sab->block_size = read_u32le(0x0c,sf);
/* 0x10: number of blocks */
/* 0x14: file id? */
sab->is_stream = sab->flags & 0x04; /* "not bank" */
sab->is_extra = sab->flags & 0x10; /* not used in Worms 4 */
/* flags 1/2 are also common, no flags in banks */
sab->total_subsongs = sab->is_stream ? 1 : sab->sound_count;
sab->target_subsong = sf->stream_index;
if (sab->target_subsong == 0) sab->target_subsong = 1;
if (sab->target_subsong < 0 || sab->target_subsong > sab->total_subsongs || sab->total_subsongs < 1) goto fail;
/* stream config */
entry_offset = 0x18 + 0x1c * (sab->target_subsong - 1);
sab->codec = read_u32le(entry_offset + 0x00,sf);
sab->channel_count = read_u32le(entry_offset + 0x04,sf);
sab->sample_rate = read_u32le(entry_offset + 0x08,sf);
sab->stream_size = read_u32le(entry_offset + 0x0c,sf);
sab->loop_start = read_u32le(entry_offset + 0x10,sf);
sab->loop_end = read_u32le(entry_offset + 0x14,sf);
sab->loop_flag = (sab->loop_end > 0);
if (sab->is_stream) {
sab->stream_offset = sab->block_size;
}
else {
sab->stream_offset = 0x18 + 0x1c * sab->total_subsongs;
if (sab->stream_offset % sab->block_size)
sab->stream_offset += sab->block_size - (sab->stream_offset % sab->block_size);
sab->stream_offset += read_u32le(0x18 + 0x1c * (sab->target_subsong - 1) + 0x18,sf);
}
/* some extra values (counts?) and name at start */
if (sab->is_extra)
sab->stream_offset += sab->block_size;
return 1;
fail:
return 0;
}
static VGMSTREAM* build_vgmstream(STREAMFILE* sf, sab_header* sab) {
VGMSTREAM* vgmstream = NULL;
off_t start_offset;
/* in streams streamfile is de-chunked so start becomes 0 */
start_offset = sab->is_stream ?
0 :
sab->stream_offset;
/* build the VGMSTREAM */
vgmstream = allocate_vgmstream(sab->channel_count, sab->loop_flag);
if (!vgmstream) goto fail;
vgmstream->sample_rate = sab->sample_rate;
vgmstream->stream_size = sab->stream_size;
vgmstream->meta_type = meta_SAB;
switch(sab->codec) {
case 0x01: /* PC */
vgmstream->coding_type = coding_PCM16LE;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x02;
vgmstream->num_samples = pcm_bytes_to_samples(sab->stream_size, vgmstream->channels, 16);
vgmstream->loop_start_sample = pcm_bytes_to_samples(sab->loop_start, vgmstream->channels, 16);
vgmstream->loop_end_sample = pcm_bytes_to_samples(sab->loop_end, vgmstream->channels, 16);
break;
case 0x04: /* PS2 */
vgmstream->coding_type = coding_PSX;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x10;
vgmstream->num_samples = ps_bytes_to_samples(sab->stream_size, vgmstream->channels);
vgmstream->loop_start_sample = ps_bytes_to_samples(sab->loop_start, vgmstream->channels);
vgmstream->loop_end_sample = ps_bytes_to_samples(sab->loop_end, vgmstream->channels);
break;
case 0x08: /* Xbox */
vgmstream->coding_type = coding_XBOX_IMA;
vgmstream->layout_type = layout_none;
vgmstream->num_samples = xbox_ima_bytes_to_samples(sab->stream_size, vgmstream->channels);
vgmstream->loop_start_sample = xbox_ima_bytes_to_samples(sab->loop_start, vgmstream->channels);
vgmstream->loop_end_sample = xbox_ima_bytes_to_samples(sab->loop_end, vgmstream->channels);
break;
default:
VGM_LOG("SAB: unknown codec\n");
goto fail;
}
if (!vgmstream_open_stream(vgmstream, sf, start_offset))
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
}
static VGMSTREAM* build_layered_vgmstream(STREAMFILE* sf, sab_header* sab) {
VGMSTREAM* vgmstream = NULL;
STREAMFILE* temp_sf = NULL;
layered_layout_data* data = NULL;
int i;
if (sab->sound_count == 1 || !sab->is_stream) {
return build_vgmstream(sf, sab);
}
/* init layout */
data = init_layout_layered(sab->sound_count);
if (!data) goto fail;
/* de-chunk audio layers */
for (i = 0; i < sab->sound_count; i++) {
temp_sf = setup_sab_streamfile(sf, sab->stream_offset, sab->sound_count, i, sab->block_size);
if (!temp_sf) goto fail;
data->layers[i] = build_vgmstream(temp_sf, sab);
if (!data->layers[i]) goto fail;
close_streamfile(temp_sf);
temp_sf = NULL;
}
/* setup VGMSTREAMs */
if (!setup_layout_layered(data))
goto fail;
/* build the layout VGMSTREAM */
vgmstream = allocate_layered_vgmstream(data);
if (!vgmstream) goto fail;
//sab->stream_size = sab->stream_size * sab->sound_count; /* ? */
return vgmstream;
fail:
close_streamfile(temp_sf);
close_vgmstream(vgmstream);
if (!vgmstream)
free_layout_layered(data);
return NULL;
}
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