Always use 16bit samples internally

audiohandler.cpp

@@ -99,9 +99,10 @@ bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16
     if (isInitialized) {
         return false;
     }
-    format.setSampleSize(bits);
+    /* Always use 16 bit 48K samples internally*/
+    format.setSampleSize(16);
     format.setChannelCount(channels);
-    format.setSampleRate(samplerate);
+    format.setSampleRate(48000);
     format.setCodec("audio/pcm");
     format.setByteOrder(QAudioFormat::LittleEndian);
     format.setSampleType(QAudioFormat::SignedInt);
@@ -109,6 +110,8 @@ bool audioHandler::init(const quint8 bits, const quint8 channels, const quint16
     this->bufferSize = buffer;
     this->isUlaw = ulaw;
     this->isInput = isinput;
+    this->radioSampleBits = bits;
+    this->radioSampleRate = samplerate;
 
     if (isInput)
         isInitialized = setDevice(QAudioDeviceInfo::defaultInputDevice());
@@ -272,15 +275,26 @@ qint64 audioHandler::readData(char* data, qint64 maxlen)
             qToLittleEndian<qint16>(uLawDecode(buffer.at(f)), data + f * 2);
         }
         buffer.remove(0, outlen);
-        outlen = outlen * 2; 
+        outlen = outlen * 2;
     }
     else {
-        // Just copy it.
-        outlen = qMin(buffer.length(), (int)maxlen);
-        if (outlen % 2 != 0) {
-            outlen += 1;
+        if (radioSampleBits == 8)
+        {
+            outlen = qMin(buffer.length(), (int)maxlen/2);
+            for (int f = 0; f < outlen; f++)
+            {
+                qToLittleEndian<qint16>((qint16)(buffer[f]<<8) - 32640, data + f * 2);
+            }
+            buffer.remove(0, outlen);
+            outlen = outlen * 2;
+        } else {
+            // Just copy it.
+            outlen = qMin(buffer.length(), (int)maxlen);
+            if (outlen % 2 != 0) {
+                outlen += 1;
+            }
+            memcpy(data, buffer.data(), outlen);
         }
-        memcpy(data, buffer.data(), outlen);
         buffer.remove(0, outlen);
     }
 
@@ -289,20 +303,26 @@ qint64 audioHandler::readData(char* data, qint64 maxlen)
 
 qint64 audioHandler::writeData(const char* data, qint64 len)
 {
+    int chunkSize = 960; // Assume 8bit or uLaw.
     if (isUlaw) {
         for (int f = 0; f < len / 2; f++)
         {
             buffer.append(uLawEncode(qFromLittleEndian<qint16>(data + f * 2)));
         }
     }
-    else {
-        buffer.append(QByteArray::fromRawData(data, len));
+    else if (radioSampleBits == 8) {
+        for (int f = 0; f < len / 2; f++)
+        {
+            buffer.append((quint8)(((qFromLittleEndian<qint16>(data + f * 2) >> 8) ^ 0x80) & 0xff));
+        }
     }
-    int chunkSize = 960;
-    if (format.sampleSize() == 16 && !isUlaw)
-    {
+    else if (radioSampleBits == 16) {
+        buffer.append(QByteArray::fromRawData(data, len));
         chunkSize = 1920;
     }
+    else {
+        qWarning() << "Unsupported number of bits! :" << radioSampleBits;
+    }
 
     while (buffer.length() >= chunkSize)
     {

audiohandler.h

@@ -70,6 +70,8 @@ private:
     QByteArray       buffer;
     QAudioFormat     format;
     QAudioDeviceInfo deviceInfo;
+    quint16          radioSampleRate;
+    quint8           radioSampleBits;
 
 };
 

udphandler.cpp

@@ -298,18 +298,6 @@ void udpHandler::DataReceived()
 
 qint64 udpHandler::SendRequestSerialAndAudio()
 {
-
-    /*
-        0x72 is RX audio codec
-        0x73 is TX audio codec (only single channel options) 
-        0x01 uLaw 1ch 8bit
-        0x02 PCM 1ch 8bit
-        0x04 PCM 1ch 16bit
-        0x08 PCM 2ch 8bit
-        0x10 PCM 2ch 16bit
-        0x20 uLaw 2ch 8bit
-    */
-
     quint8* usernameEncoded = Passcode(username);
     int txSeqBufLengthMs = 50;
 
@@ -569,12 +557,26 @@ udpAudio::udpAudio(QHostAddress local, QHostAddress ip, quint16 aport, quint16 b
 
     QUdpSocket::connect(udp, &QUdpSocket::readyRead, this, &udpAudio::DataReceived);
 
-    if (rxCodec == 0x01 || rxCodec == 0x20)
+    /*
+    0x72 is RX audio codec
+    0x73 is TX audio codec (only single channel options)
+    0x01 uLaw 1ch 8bit
+    0x02 PCM 1ch 8bit
+    0x04 PCM 1ch 16bit
+    0x08 PCM 2ch 8bit
+    0x10 PCM 2ch 16bit
+    0x20 uLaw 2ch 8bit
+    */
+
+    if (rxCodec == 0x01 || rxCodec == 0x20) {
         rxIsUlawCodec = true;
-    if (rxCodec == 0x08 || rxCodec == 0x10 || rxCodec == 0x20)
+    }
+    if (rxCodec == 0x08 || rxCodec == 0x10 || rxCodec == 0x20) {
         rxChannelCount = 2;
-    if (rxCodec == 0x02 || rxCodec == 0x8)
-        rxNumSamples = 8; // uLaw is actually 16bit. 
+    }
+    if (rxCodec == 0x04 || rxCodec == 0x10) {
+        rxNumSamples = 16;
+    }
 
     rxaudio = new audioHandler();
     rxAudioThread = new QThread(this);
@@ -588,8 +590,8 @@ udpAudio::udpAudio(QHostAddress local, QHostAddress ip, quint16 aport, quint16 b
 
     if (txCodec == 0x01)
         txIsUlawCodec = true;
-    else if (txCodec == 0x02)
-        txNumSamples = 8; // uLaw is actually 16bit. 
+    else if (txCodec == 0x04)
+        txNumSamples = 16;
 
     txChannelCount = 1; // Only 1 channel is supported.
 

udphandler.h

@@ -145,10 +145,10 @@ private:
 	quint8 txCodec;
 	quint8 rxChannelCount = 1;
 	bool rxIsUlawCodec = false;
-	quint8 rxNumSamples = 16;
+	quint8 rxNumSamples = 8;
 	quint8 txChannelCount = 1;
 	bool txIsUlawCodec = false;
-	quint8 txNumSamples = 16;
+	quint8 txNumSamples = 8;
 
 	bool sentPacketConnect2 = false;
 	uint16_t sendAudioSeq = 0;