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cleanup: experiment

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bnnm 2024-04-14 00:51:42 +02:00
parent 55e6ec3244
commit 1185bf0689
1 changed files with 20 additions and 32 deletions
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52
src/meta/svs.c
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@ -1,13 +1,10 @@
#include "meta.h" #include "meta.h"
#include "../coding/coding.h" #include "../coding/coding.h"
#include "../util/meta_utils.h"
/* SVS - SeqVagStream from Square games [Unlimited Saga (PS2) music] */ /* SVS - SeqVagStream from Square games [Unlimited Saga (PS2) music] */
VGMSTREAM* init_vgmstream_svs(STREAMFILE* sf) { VGMSTREAM* init_vgmstream_svs(STREAMFILE* sf) {
VGMSTREAM* vgmstream = NULL;
off_t start_offset;
int channels, loop_flag, pitch;
/* checks */ /* checks */
if (!is_id32be(0x00,sf, "SVS\0")) if (!is_id32be(0x00,sf, "SVS\0"))
@ -17,39 +14,30 @@ VGMSTREAM* init_vgmstream_svs(STREAMFILE* sf) {
if (!check_extensions(sf, "bgm,svs")) if (!check_extensions(sf, "bgm,svs"))
return NULL; return NULL;
meta_header_t h = {
.meta = meta_SVS,
};
/* 0x04: flags (1=stereo?, 2=loop) */ /* 0x04: flags (1=stereo?, 2=loop) */
pitch = read_s32le(0x10,sf); /* usually 0x1000 = 48000 */ //h.loop_start = read_s32le(0x08,sf) * 28; /* frame count (0x10 * ch) */
h.loop_end = read_s32le(0x0c,sf) * 28; /* frame count (not exact num_samples when no loop) */
int pitch = read_s32le(0x10,sf); /* usually 0x1000 = 48000 */
/* 0x14: volume? */ /* 0x14: volume? */
/* 0x18: file id (may be null) */ /* 0x18: file id (may be null) */
/* 0x1c: null */ /* 0x1c: null */
h.stream_offset = 0x20;
h.stream_size = get_streamfile_size(sf) - h.stream_offset;
loop_flag = (read_s32le(0x08,sf) > 0); /* loop start frame, min is 1 */ h.channels = 2;
channels = 2; h.sample_rate = round10((48000 * pitch) / 4096); /* music = ~44100, ambience = 48000 (rounding makes more sense but not sure) */
start_offset = 0x20; h.num_samples = ps_bytes_to_samples(h.stream_size, h.channels);
/* loop start/end on the same frame rarely happens too (ex. file_id 63 SVS), perhaps loop should be +1 */
h.loop_flag = (h.loop_start > 0); /* min is 1 */
h.coding = coding_PSX;
h.layout = layout_interleave;
h.interleave = 0x10;
/* build the VGMSTREAM */ h.sf = sf;
vgmstream = allocate_vgmstream(channels, loop_flag); h.open_stream = true;
if (!vgmstream) goto fail; return alloc_metastream(&h);
vgmstream->meta_type = meta_SVS;
vgmstream->sample_rate = round10((48000 * pitch) / 4096); /* music = ~44100, ambience = 48000 (rounding makes more sense but not sure) */
vgmstream->num_samples = ps_bytes_to_samples(get_streamfile_size(sf) - start_offset, channels);
if (loop_flag) {
vgmstream->loop_start_sample = read_s32le(0x08,sf) * 28; /* frame count (0x10*ch) */
vgmstream->loop_end_sample = read_s32le(0x0c,sf) * 28; /* frame count, (not exact num_samples when no loop) */
/* start/end on the same frame rarely happens too (ex. file_id 63 SVS), perhaps loop should be +1 */
}
vgmstream->coding_type = coding_PSX;
vgmstream->layout_type = layout_interleave;
vgmstream->interleave_block_size = 0x10;
if (!vgmstream_open_stream(vgmstream,sf,start_offset))
goto fail;
return vgmstream;
fail:
close_vgmstream(vgmstream);
return NULL;
} }