How to fill a buffer in a Thread with QtTcpSocket?

xmaze

Hi, i have a problem in a thread. I want to process some data from RTLSDR device and i use the rtl tcp program to read the raw data from a tcp connection. The problem is that this program sends 1448 bytes and i cannot change the buffer.
I think that if i can read the socket 10 times then i can fill a buffer 10 times and then i want to process the 14480 bytes. I am not expert and i cannot find a solution. Any ideas?

char *datas= new char[1448*10];
QTcpSocket *a=new QTcpSocket(this);
a->setReadBufferSize(1448);
 a->connectToHost("192.168.0.124", 5000);
if( a->waitForConnected(1000) ) {
}
pthread_mutex_lock(&data_mutex);

while(1) {
while((a->waitForReadyRead(20))) {}
a->read(datas,1448);
/* Move the last part of the previous buffer, that was not processed,
 * on the start of the new buffer. */
memcpy(Modes.data, Modes.data+DATA_LEN, (FULL_LEN-1)*4);
/* Read the new data. */
memcpy(Modes.data+(FULL_LEN-1)*4, datas,DATA_LEN);
Modes.data_ready = 1;
pthread_cond_signal(&data_cond);
pthread_mutex_unlock(&data_mutex);

}

I thought with a for loop will be ok, like this :

 for(int k=0; k<10; k++) {
 while((a->waitForReadyRead(20))) {}
a->read(datas+(k*1448),1448);
}

but the while((a->waitForReadyRead(20))) {} crashes

SGaist

Hi,

Why not use signals and slots with your socket ? Just cumulate the data read in a QByteArray and when you have enough start parsing it

xmaze

@SGaist said:

Hi,

Why not use signals and slots with your socket ? Just cumulate the data read in a QByteArray and when you have enough start parsing it

And how can i send a signal to the other thread that the data is ready ?

kuzulis_

QTcpSocket *a=new QTcpSocket(this);

"this" is wrong. please read about QThread and related documentation..

[edit: corrected coding tags SGaist]