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Fix SFX BRR data locations

This commit is contained in:
Luke Hubmayer-Werner 2023-07-25 18:37:55 +09:30
parent f19a8c0f50
commit b5800ae0fa
1 changed files with 20 additions and 9 deletions
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29
scripts/loaders/sound_loader.gd
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@ -4,11 +4,12 @@ const BGM_NUM := 70
const BGM_LOOKUP := 0x043B97
const INST_NUM := 35
const INST_BRR_LOOKUP := 0x043C6F
const INST_SR := 0x043CD8
const INST_LOOP := 0x043D1E
const INST_LOOP := 0x043CD8
const INST_SR := 0x043D1E
const INST_ADSR := 0x043D64
const SFX_NUM := 8
const SFX_BRR_START := 0x041E3F
const SFX_BRR_SPC_TABLE := 0x041F4F + 2 # (first two bytes are the length of 0x0020 = 32 bytes = 4*8)
const SFX_BRR_START := 0x041E3F + 2 # First two bytes are the length of the block, 0x010E = 270 bytes = 16 BRR packets = 480 samples
const SFX_ADSR := 0x041F71
const SFX_SR := 0x041F83
var bgm_tracks = []
@ -51,13 +52,12 @@ func decode_brr(data: PoolByteArray):
func clamp_short(i: int):
return min(max(i, -0x8000), 0x7FFF)
func make_sample(rom: File, sample_rate: int) -> AudioStreamSample:
func make_sample(rom: File, size: int, sample_rate: int) -> AudioStreamSample:
var audio := AudioStreamSample.new()
audio.mix_rate = sample_rate
audio.stereo = false
audio.set_format(AudioStreamSample.FORMAT_16_BITS)
var size := rom.get_16()
if (size % 9) != 0:
print_debug('Oh no! An instrument sample has an invalid size of %d! at $%06X' % [size, rom.get_position()-2])
return audio
@ -80,6 +80,7 @@ func make_sample(rom: File, sample_rate: int) -> AudioStreamSample:
for i in range(samples.size()-8, samples.size()):
samples[i] = clamp_short(samples[i] + (samples[i-1]*115)/64 - (samples[i-2]*13)/16)
if end:
print('End flag on packet')
break
var audio_data = PoolByteArray()
for i in range(2, samples.size()):
@ -97,7 +98,8 @@ func get_inst_sample_data(rom: File, id: int) -> AudioStreamSample:
rom.seek(lookup_offset)
var brr_offset := read_rom_address(rom)
rom.seek(brr_offset)
var sample := make_sample(rom, sample_rate)
var size := rom.get_16()
var sample := make_sample(rom, size, sample_rate)
#print_debug('Loaded sample instrument #%02X with lookup offset $%06X, BRR data offset $%06X and length $%04X (%f packets)' % [id, lookup_offset, brr_offset, size, size/9.0])
return sample
@ -106,18 +108,27 @@ func load_sfx_samples_data(rom: File):
rom.seek(SFX_SR)
for i in SFX_NUM:
sample_rates.append((rom.get_16() * 32000)/4096)
rom.seek(SFX_BRR_START)
var brr_spc_addrs = []
var brr_spc_loop_addrs = []
rom.seek(SFX_BRR_SPC_TABLE)
for i in SFX_NUM:
brr_spc_addrs.append(rom.get_16())
brr_spc_loop_addrs.append(rom.get_16())
var brr_spc_start = brr_spc_addrs[0]
for i in SFX_NUM:
brr_spc_addrs[i] += SFX_BRR_START - brr_spc_start
for i in SFX_NUM:
rom.seek(brr_spc_addrs[i])
print('Loading sfx sample #%X with BRR data offset $%06X' % [i, rom.get_position()])
sfx_samples.append(make_sample(rom, sample_rates[i]))
sfx_samples.append(make_sample(rom, 900, sample_rates[i])) # Use 900 as a limit, it won't be hit, parser stops after End packet anyway
print('size of %d samples' % sfx_samples[i].data.size())
# Called when the node enters the scene tree for the first time.
func load_samples(rom: File):
load_sfx_samples_data(rom)
for i in INST_NUM:
instrument_samples.append(get_inst_sample_data(rom, i))
load_sfx_samples_data(rom)