Merge pull request #1 from Gumball2415/dpcm-bit-reversal

DPCM Bit Order Reversal

Author: Gumball2415

Source/SampleEditorDlg.cpp

@@ -81,6 +81,7 @@ BEGIN_MESSAGE_MAP(CSampleEditorDlg, CDialog)
 	ON_BN_CLICKED(IDC_TILT, &CSampleEditorDlg::OnBnClickedTilt)
 	ON_WM_HSCROLL()
 	ON_WM_GETMINMAXINFO()
+	ON_BN_CLICKED(IDC_BIT_REVERSE, &CSampleEditorDlg::OnBnClickedBitReverse)
 END_MESSAGE_MAP()
 
 
@@ -235,6 +236,50 @@ void CSampleEditorDlg::OnBnClickedTilt()
 	SelectionChanged();
 }
 
+void CSampleEditorDlg::OnBnClickedBitReverse()
+{
+	m_pSoundGen->CancelPreviewSample();
+	
+	// using a lookup table for bit reversal
+	static const unsigned char BitTable[] =
+	{
+	  0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+	  0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+	  0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+	  0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+	  0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+	  0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+	  0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+	  0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+	  0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+	  0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+	  0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+	  0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+	  0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+	  0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+	  0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+	  0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+	};
+	char* InputData = new char[m_pSample->GetSize()];
+	memcpy(InputData, m_pSample->GetData(), m_pSample->GetSize());
+	char* DataCache = new char[m_pSample->GetSize()];
+	// bit reverse each byte of InputData and save it to DataCache
+	for (int i=1; i != m_pSample->GetSize(); i++) {
+		char InputByte = InputData[i];
+		char ByteCache = InputByte & 1;
+		ByteCache = (BitTable[InputByte & 0xff]);// |
+			//(BitTable[(InputByte >> 8) & 0xff] << 16) |
+			//(BitTable[(InputByte >> 16) & 0xff] << 8) |
+			//(BitTable[(InputByte >> 24) & 0xff]);
+
+		DataCache[i] = ByteCache;
+	}
+	m_pSample->SetData(m_pSample->GetSize(), DataCache);
+
+	UpdateSampleView();
+	SelectionChanged();
+}
+
 void CSampleEditorDlg::OnBnClickedDeltastart()
 {
 	UpdateSampleView();

Source/SampleEditorDlg.h

@@ -67,4 +67,5 @@ class CSampleEditorDlg : public CDialog
 	afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
 	virtual BOOL PreTranslateMessage(MSG* pMsg);
 	afx_msg void OnGetMinMaxInfo(MINMAXINFO* lpMMI);
+	afx_msg void OnBnClickedBitReverse();
 };

res/0CC-FamiTracker.rc

@@ -1627,14 +1627,15 @@ BEGIN
     DEFPUSHBUTTON   "OK",IDOK,424,213,50,14
     PUSHBUTTON      "Cancel",IDCANCEL,424,230,50,14
     CONTROL         "",IDC_SAMPLE,"Static",SS_WHITERECT | SS_NOTIFY | SS_SUNKEN,2,2,476,204
-    PUSHBUTTON      "Play",IDC_PLAY,7,212,50,14
-    PUSHBUTTON      "Delete",IDC_DELETE,64,212,50,14
+    PUSHBUTTON      "Play",IDC_PLAY,7,212,39,14
+    PUSHBUTTON      "Delete",IDC_DELETE,47,212,38,14
     CONTROL         "",IDC_PITCH,"msctls_trackbar32",TBS_AUTOTICKS | WS_TABSTOP,45,232,130,12
-    PUSHBUTTON      "Tilt",IDC_TILT,121,212,50,14
+    PUSHBUTTON      "Tilt",IDC_TILT,86,212,37,14
     LTEXT           "Pitch (15)",IDC_STATIC_PITCH,8,233,34,11
     CONTROL         "Center wave",IDC_DELTASTART,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,179,232,57,10
     CONTROL         "",IDC_ZOOM,"msctls_trackbar32",TBS_AUTOTICKS | WS_TABSTOP,240,213,181,12
     LTEXT           "Zoom (1.00x)",IDC_STATIC_DPCM_ZOOM,185,214,54,8
+    PUSHBUTTON      "Bit Reverse",IDC_BIT_REVERSE,124,212,47,14
 END
 
 IDD_DETUNE DIALOGEX 0, 0, 293, 272
@@ -2261,7 +2262,8 @@ BEGIN
     0, 100, 0, 0,
     0, 100, 0, 0,
     0, 100, 0, 0,
-    0, 100, 0, 0
+    0, 100, 0, 0,
+    0, 0, 0, 0
 END
 
 IDD_INSTRUMENT_DPCM AFX_DIALOG_LAYOUT

res/resource.h

@@ -598,6 +598,7 @@
 #define IDC_N163_OFFSET_EDIT            1463
 #define IDC_N163_OFFSET_DB              1464
 #define IDC_FONT_PERCENT                1465
+#define IDC_BIT_REVERSE                 1467
 #define IDS_FIND_BEGIN                  9001
 #define IDS_FIND_END                    9002
 #define ID_TRACKER_PLAY                 32771
@@ -759,7 +760,7 @@
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        358
 #define _APS_NEXT_COMMAND_VALUE         33200
-#define _APS_NEXT_CONTROL_VALUE         1466
+#define _APS_NEXT_CONTROL_VALUE         1468
 #define _APS_NEXT_SYMED_VALUE           179
 #endif
 #endif