File Input: acceleration and loop handling phase 1

plugins/samplesource/filesource/filesourcesettings.cpp

@@ -18,6 +18,8 @@
 
 #include "filesourcesettings.h"
 
+const unsigned int FileSourceSettings::m_accelerationMaxScale = 1;
+
 FileSourceSettings::FileSourceSettings()
 {
     resetToDefaults();
@@ -28,12 +30,16 @@ void FileSourceSettings::resetToDefaults()
     m_centerFrequency = 435000000;
     m_sampleRate = 48000;
     m_fileName = "./test.sdriq";
+    m_accelerationFactor = 1;
+    m_loop = true;
 }
 
 QByteArray FileSourceSettings::serialize() const
 {
     SimpleSerializer s(1);
     s.writeString(1, m_fileName);
+    s.writeU32(2, m_accelerationFactor);
+    s.writeBool(3, m_loop);
     return s.final();
 }
 
@@ -48,6 +54,8 @@ bool FileSourceSettings::deserialize(const QByteArray& data)
 
     if(d.getVersion() == 1) {
         d.readString(1, &m_fileName, "./test.sdriq");
+        d.readU32(2, &m_accelerationFactor, 1);
+        d.readBool(3, &m_loop, true);
         return true;
     } else {
         resetToDefaults();
@@ -55,6 +63,60 @@ bool FileSourceSettings::deserialize(const QByteArray& data)
     }
 }
 
+int FileSourceSettings::getAccelerationIndex(int accelerationValue)
+{
+    if (accelerationValue <= 1) {
+        return 0;
+    }
+
+    int v = accelerationValue;
+    int j = 0;
+
+    for (int i = 0; i <= accelerationValue; i++)
+    {
+        if (v < 20)
+        {
+            if (v < 2) {
+                j = 0;
+            } else if (v < 5) {
+                j = 1;
+            } else if (v < 10) {
+                j = 2;
+            } else {
+                j = 3;
+            }
+
+            return 3*i + j;
+        }
+
+        v /= 10;
+    }
+
+    return 3*m_accelerationMaxScale + 3;
+}
+
+int FileSourceSettings::getAccelerationValue(int accelerationIndex)
+{
+    if (accelerationIndex <= 0) {
+        return 1;
+    }
+
+    unsigned int v = accelerationIndex - 1;
+    int m = pow(10.0, v/3 > m_accelerationMaxScale ? m_accelerationMaxScale : v/3);
+    int x;
+
+    if (v % 3 == 0) {
+        x = 2;
+    } else if (v % 3 == 1) {
+        x = 5;
+    } else if (v % 3 == 2) {
+        x = 10;
+    }
+
+    return x * m;
+}
+
+