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neotools: neoadpcmextract now converts ADPCM-B to Wave

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a dinosaur
2023-12-29 04:04:28 +11:00
parent 5b28c18472
commit 47f6b23943
4 changed files with 133 additions and 101 deletions
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94
neotools/adpcmb.c
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@@ -1,10 +1,8 @@
/*; YM2610 ADPCM-B Codec
;
;
/* adpcmb.c - CLI for encoding & decoding YM2610 ADPCM-B files
; Fred/FRONT
;
;Usage 1: ADPCM_Encode.exe -d [-r:reg,clock] Input.bin Output.wav
;Usage 2: ADPCM_Encode.exe -e Input.wav Output.bin
;Usage 1: ADPCM_Encode -d [-r:reg,clock] Input.bin Output.wav
;Usage 2: ADPCM_Encode -e Input.wav Output.bin
;
; Valley Bell
;----------------------------------------------------------------------------------------------------------------------------*/
@@ -17,90 +15,6 @@
#include <string.h>
/* PCM to ADPCM-B & ADPCM-B to PCM converters for NEO-GEO System ****
ADPCM-B - 1 channel 1.8-55.5 KHz, 16 MB Sample ROM size, 256 B min size of sample, 16 MB max, compatable with YM2608
http://www.raregame.ru/file/15/YM2610.pdf YM2610 DATASHEET
*/
static const long stepSizeTable[16] =
{
57, 57, 57, 57, 77, 102, 128, 153,
57, 57, 57, 57, 77, 102, 128, 153
};
void adpcmBEncoderInit(AdpcmBEncoderState* encoder)
{
encoder->xn = 0;
encoder->stepSize = 127;
encoder->flag = false;
encoder->adpcmPack = 0;
}
void adpcmBEncode(AdpcmBEncoderState* encoder, const int16_t* restrict in, uint8_t* restrict out, int len)
{
for (int lpc = 0; lpc < len; ++lpc)
{
long dn = (*in++) - encoder->xn;
long i = (labs(dn) << 16) / (encoder->stepSize << 14);
i = MIN(i, 7);
uint8_t adpcm = i;
i = (adpcm * 2 + 1) * encoder->stepSize / 8;
if (dn < 0)
{
adpcm |= 0x8;
encoder->xn -= i;
}
else
{
encoder->xn += i;
}
encoder->stepSize = (stepSizeTable[adpcm] * encoder->stepSize) / 64;
encoder->stepSize = CLAMP(encoder->stepSize, 127, 24576);
if (!encoder->flag)
{
encoder->adpcmPack = adpcm << 4;
encoder->flag = true;
}
else
{
(*out++) = encoder->adpcmPack |= adpcm;
encoder->flag = false;
}
}
}
void adpcmBDecoderInit(AdpcmBDecoderState* decoder)
{
decoder->xn = 0;
decoder->stepSize = 127;
}
void adpcmBDecode(AdpcmBDecoderState* decoder, const uint8_t* restrict in, int16_t* restrict out, int len)
{
for (long lpc = 0; lpc < len * 2; ++lpc)
{
uint8_t adpcm = (!(lpc & 0x1) ? (*in) >> 4 : (*in++)) & 0xF;
long i = ((adpcm & 7) * 2 + 1) * decoder->stepSize / 8;
if (adpcm & 8)
decoder->xn -= i;
else
decoder->xn += i;
decoder->xn = CLAMP(decoder->xn, -32768, 32767);
decoder->stepSize = decoder->stepSize * stepSizeTable[adpcm] / 64;
decoder->stepSize = CLAMP(decoder->stepSize, 127, 24576);
(*out++) = (int16_t)decoder->xn;
}
}
static FORCE_INLINE uint32_t DeltaTReg2SampleRate(uint16_t DeltaN, uint32_t Clock)
{
return (uint32_t)(DeltaN * (Clock / 72.0) / 65536.0 + 0.5);
@@ -302,7 +216,7 @@ int main(int argc, char* argv[])
printf("NeoGeo ADPCM-B En-/Decoder\n--------------------------\n");
if (argc < 4)
{
printf("Usage: ADPCM_Encode.exe -method [-option] InputFile OutputFile\n");
printf("Usage: ADPCM_Encode -method [-option] InputFile OutputFile\n");
printf("-method - En-/Decoding Method:\n");
printf(" -d for decode (bin -> wav)\n");
printf(" -e for encode (wav -> bin)\n");