From 32ec87ca27223f2f628b4b7352a8cf230dff2e45 Mon Sep 17 00:00:00 2001
From: tildearrow <me@tildearrow.org>
Date: Tue, 29 Aug 2023 04:26:25 -0500
Subject: [PATCH] prepare for K05 ADPCM

---
 src/engine/fileOpsSample.cpp |  2 ++
 src/engine/sample.cpp        | 33 +++++++++++++++++++++++++++++++++
 src/engine/sample.h          |  7 ++++++-
 src/gui/guiConst.cpp         |  2 +-
 4 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/src/engine/fileOpsSample.cpp b/src/engine/fileOpsSample.cpp
index 0cc3d5b56..ac9441adc 100644
--- a/src/engine/fileOpsSample.cpp
+++ b/src/engine/fileOpsSample.cpp
@@ -390,6 +390,7 @@ DivSample* DivEngine::sampleFromFileRaw(const char* path, DivSampleDepth depth,
     case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
     case DIV_SAMPLE_DEPTH_ADPCM_A:
     case DIV_SAMPLE_DEPTH_ADPCM_B:
+    case DIV_SAMPLE_DEPTH_ADPCM_K:
     case DIV_SAMPLE_DEPTH_VOX:
       samples=lenDivided*2;
       break;
@@ -488,6 +489,7 @@ DivSample* DivEngine::sampleFromFileRaw(const char* path, DivSampleDepth depth,
       case DIV_SAMPLE_DEPTH_QSOUND_ADPCM:
       case DIV_SAMPLE_DEPTH_ADPCM_A:
       case DIV_SAMPLE_DEPTH_ADPCM_B:
+      case DIV_SAMPLE_DEPTH_ADPCM_K:
       case DIV_SAMPLE_DEPTH_VOX:
         // swap nibbles
         for (unsigned int i=0; i<sample->getCurBufLen(); i++) {
diff --git a/src/engine/sample.cpp b/src/engine/sample.cpp
index fe640d270..21738b8aa 100644
--- a/src/engine/sample.cpp
+++ b/src/engine/sample.cpp
@@ -261,6 +261,9 @@ int DivSample::getSampleOffset(int offset, int length, DivSampleDepth depth) {
       case DIV_SAMPLE_DEPTH_ADPCM_B:
         off=(offset+1)/2;
         break;
+      case DIV_SAMPLE_DEPTH_ADPCM_K:
+        off=(offset+1)/2;
+        break;
       case DIV_SAMPLE_DEPTH_8BIT:
         off=offset;
         break;
@@ -311,6 +314,10 @@ int DivSample::getSampleOffset(int offset, int length, DivSampleDepth depth) {
         off=(offset+1)/2;
         len=(length+1)/2;
         break;
+      case DIV_SAMPLE_DEPTH_ADPCM_K:
+        off=(offset+1)/2;
+        len=(length+1)/2;
+        break;
       case DIV_SAMPLE_DEPTH_8BIT:
         off=offset;
         len=length;
@@ -371,6 +378,9 @@ int DivSample::getEndPosition(DivSampleDepth depth) {
     case DIV_SAMPLE_DEPTH_ADPCM_B:
       off=lengthB;
       break;
+    case DIV_SAMPLE_DEPTH_ADPCM_K:
+      off=lengthK;
+      break;
     case DIV_SAMPLE_DEPTH_8BIT:
       off=length8;
       break;
@@ -540,6 +550,12 @@ bool DivSample::initInternal(DivSampleDepth d, int count) {
       dataB=new unsigned char[(lengthB+255)&(~0xff)];
       memset(dataB,0,(lengthB+255)&(~0xff));
       break;
+    case DIV_SAMPLE_DEPTH_ADPCM_K: // K05 ADPCM
+      if (dataK!=NULL) delete[] dataK;
+      lengthK=(count+1)/2;
+      dataK=new unsigned char[(lengthK+255)&(~0xff)];
+      memset(dataK,0,(lengthK+255)&(~0xff));
+      break;
     case DIV_SAMPLE_DEPTH_8BIT: // 8-bit
       if (data8!=NULL) delete[] data8;
       length8=count;
@@ -800,6 +816,9 @@ void DivSample::convert(DivSampleDepth newDepth) {
     case DIV_SAMPLE_DEPTH_ADPCM_B: // ADPCM-B
       setSampleCount((samples+1)&(~1));
       break;
+    case DIV_SAMPLE_DEPTH_ADPCM_K: // K05 ADPCM
+      setSampleCount((samples+1)&(~1));
+      break;
     case DIV_SAMPLE_DEPTH_BRR: // BRR
       setSampleCount(16*(lengthBRR/9));
       break;
@@ -1209,6 +1228,11 @@ void DivSample::render(unsigned int formatMask) {
       case DIV_SAMPLE_DEPTH_ADPCM_B: // ADPCM-B
         ymb_decode(dataB,data16,samples);
         break;
+      case DIV_SAMPLE_DEPTH_ADPCM_K: // K05 ADPCM
+        for (unsigned int i=0; i<samples; i++) {
+          // TODO: ADPCM-K
+        }
+        break;
       case DIV_SAMPLE_DEPTH_8BIT: // 8-bit PCM
         for (unsigned int i=0; i<samples; i++) {
           data16[i]=data8[i]<<8;
@@ -1282,6 +1306,10 @@ void DivSample::render(unsigned int formatMask) {
     if (!initInternal(DIV_SAMPLE_DEPTH_ADPCM_B,samples)) return;
     ymb_encode(data16,dataB,(samples+511)&(~0x1ff));
   }
+  if (NOT_IN_FORMAT(DIV_SAMPLE_DEPTH_ADPCM_K)) { // K05 ADPCM
+    if (!initInternal(DIV_SAMPLE_DEPTH_ADPCM_K,samples)) return;
+    // TODO: ADPCM-K
+  }
   if (NOT_IN_FORMAT(DIV_SAMPLE_DEPTH_8BIT)) { // 8-bit PCM
     if (!initInternal(DIV_SAMPLE_DEPTH_8BIT,samples)) return;
     if (dither) {
@@ -1362,6 +1390,8 @@ void* DivSample::getCurBuf() {
       return dataA;
     case DIV_SAMPLE_DEPTH_ADPCM_B:
       return dataB;
+    case DIV_SAMPLE_DEPTH_ADPCM_K:
+      return dataK;
     case DIV_SAMPLE_DEPTH_8BIT:
       return data8;
     case DIV_SAMPLE_DEPTH_BRR:
@@ -1394,6 +1424,8 @@ unsigned int DivSample::getCurBufLen() {
       return lengthA;
     case DIV_SAMPLE_DEPTH_ADPCM_B:
       return lengthB;
+    case DIV_SAMPLE_DEPTH_ADPCM_K:
+      return lengthK;
     case DIV_SAMPLE_DEPTH_8BIT:
       return length8;
     case DIV_SAMPLE_DEPTH_BRR:
@@ -1511,6 +1543,7 @@ DivSample::~DivSample() {
   if (dataQSoundA) delete[] dataQSoundA;
   if (dataA) delete[] dataA;
   if (dataB) delete[] dataB;
+  if (dataK) delete[] dataK;
   if (dataBRR) delete[] dataBRR;
   if (dataVOX) delete[] dataVOX;
   if (dataMuLaw) delete[] dataMuLaw;
diff --git a/src/engine/sample.h b/src/engine/sample.h
index cf2f9ef07..bca881650 100644
--- a/src/engine/sample.h
+++ b/src/engine/sample.h
@@ -40,6 +40,7 @@ enum DivSampleDepth: unsigned char {
   DIV_SAMPLE_DEPTH_QSOUND_ADPCM=4,
   DIV_SAMPLE_DEPTH_ADPCM_A=5,
   DIV_SAMPLE_DEPTH_ADPCM_B=6,
+  DIV_SAMPLE_DEPTH_ADPCM_K=7,
   DIV_SAMPLE_DEPTH_8BIT=8,
   DIV_SAMPLE_DEPTH_BRR=9,
   DIV_SAMPLE_DEPTH_VOX=10,
@@ -107,6 +108,7 @@ struct DivSample {
   // - 4: QSound ADPCM
   // - 5: ADPCM-A
   // - 6: ADPCM-B
+  // - 7: K053260 4-bit simple ADPCM
   // - 8: 8-bit PCM
   // - 9: BRR (SNES)
   // - 10: VOX ADPCM
@@ -132,12 +134,13 @@ struct DivSample {
   unsigned char* dataQSoundA; // 4
   unsigned char* dataA; // 5
   unsigned char* dataB; // 6
+  unsigned char* dataK; // 7
   unsigned char* dataBRR; // 9
   unsigned char* dataVOX; // 10
   unsigned char* dataMuLaw; // 11
   unsigned char* dataC219; // 12
 
-  unsigned int length8, length16, length1, lengthDPCM, lengthZ, lengthQSoundA, lengthA, lengthB, lengthBRR, lengthVOX, lengthMuLaw, lengthC219;
+  unsigned int length8, length16, length1, lengthDPCM, lengthZ, lengthQSoundA, lengthA, lengthB, lengthK, lengthBRR, lengthVOX, lengthMuLaw, lengthC219;
 
   unsigned int samples;
 
@@ -341,6 +344,7 @@ struct DivSample {
     dataQSoundA(NULL),
     dataA(NULL),
     dataB(NULL),
+    dataK(NULL),
     dataBRR(NULL),
     dataVOX(NULL),
     dataMuLaw(NULL),
@@ -353,6 +357,7 @@ struct DivSample {
     lengthQSoundA(0),
     lengthA(0),
     lengthB(0),
+    lengthK(0),
     lengthBRR(0),
     lengthVOX(0),
     lengthMuLaw(0),
diff --git a/src/gui/guiConst.cpp b/src/gui/guiConst.cpp
index e201e1bc1..8446f8528 100644
--- a/src/gui/guiConst.cpp
+++ b/src/gui/guiConst.cpp
@@ -192,7 +192,7 @@ const char* sampleDepths[DIV_SAMPLE_DEPTH_MAX]={
   "QSound ADPCM",
   "ADPCM-A",
   "ADPCM-B",
-  NULL,
+  "K05 ADPCM",
   "8-bit PCM",
   "BRR",
   "VOX",