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Merge pull request #772 from ahigerd/oki4s-mono

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switch nibbles on OKI4s mono, add to TXTH
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Kevin López Brante 2020-12-02 06:51:56 -03:00 committed by GitHub
commit 55ac481f87
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3 changed files with 11 additions and 4 deletions
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2
doc/TXTH.md
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@ -140,6 +140,8 @@ as explained below, but often will use default values. Accepted codec strings:
# * Variation with modified encoding
# - OKI16 OKI ADPCM with 16-bit output (not VOX/Dialogic 12-bit)
# * For rare PS2 games (Sweet Legacy, Hooligan)
# - OKI4S OKI ADPCM with 16-bit output and adjusted tables
# * For later Konami rhythm games
# - AAC Advanced Audio Coding (raw without .mp4)
# * For some 3DS games and many iOS games
# * Should set skip_samples (around 1024 but varies)

2
src/coding/oki_decoder.c
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@ -197,7 +197,7 @@ void decode_oki4s(VGMSTREAMCHANNEL* stream, sample_t* outbuf, int channelspacing
stream->offset + i : /* stereo: one nibble per channel */
stream->offset + i/2; /* mono: consecutive nibbles (assumed) */
int nibble_shift =
is_stereo ? (!(channel&1) ? 0:4) : (!(i&1) ? 0:4); /* even = low, odd = high */
is_stereo ? (!(channel&1) ? 0:4) : ((i&1) ? 0:4); /* even = low, odd = high */
oki4s_expand_nibble(stream, byte_offset,nibble_shift, &hist1, &step_index, &out_sample);
outbuf[sample_count] = (out_sample);

5
src/meta/txth.c
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@ -39,6 +39,7 @@ typedef enum {
TGC = 29, /* Tiger Game.com 4-bit ADPCM */
ASF = 30, /* Argonaut ASF 4-bit ADPCM */
EAXA = 31, /* Electronic Arts EA-XA 4-bit ADPCM v1 */
OKI4S = 32, /* OKI ADPCM with 16-bit output (unlike OKI/VOX/Dialogic ADPCM's 12-bit) */
} txth_type;
typedef enum { DEFAULT, NEGATIVE, POSITIVE, INVERTED } txth_loop_t;
@ -226,6 +227,7 @@ VGMSTREAM* init_vgmstream_txth(STREAMFILE* sf) {
case PCM4: coding = coding_PCM4; break;
case PCM4_U: coding = coding_PCM4_U; break;
case OKI16: coding = coding_OKI16; break;
case OKI4S: coding = coding_OKI4S; break;
case TGC: coding = coding_TGC; break;
case ASF: coding = coding_ASF; break;
case EAXA: coding = coding_EA_XA; break;
@ -337,6 +339,7 @@ VGMSTREAM* init_vgmstream_txth(STREAMFILE* sf) {
break;
case coding_OKI16:
case coding_OKI4S:
vgmstream->layout_type = layout_none;
break;
@ -872,6 +875,7 @@ static int parse_keyval(STREAMFILE* sf_, txth_header* txth, const char * key, ch
else if (is_string(val,"PCM4")) txth->codec = PCM4;
else if (is_string(val,"PCM4_U")) txth->codec = PCM4_U;
else if (is_string(val,"OKI16")) txth->codec = OKI16;
else if (is_string(val,"OKI4S")) txth->codec = OKI4S;
else if (is_string(val,"AAC")) txth->codec = AAC;
else if (is_string(val,"TGC")) txth->codec = TGC;
else if (is_string(val,"GCOM_ADPCM")) txth->codec = TGC;
@ -1790,6 +1794,7 @@ static int get_bytes_to_samples(txth_header* txth, uint32_t bytes) {
return yamaha_bytes_to_samples(bytes, txth->channels);
case PCFX:
case OKI16:
case OKI4S:
return oki_bytes_to_samples(bytes, txth->channels);
/* untested */