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BIG FIX: Truncated stream of incoming samples on 32 bit targets !

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This one is a veryy old long standing bug I was look for. All 32 bit Windows builds
suffered indeed of corrupted sound defects in all circumstances (reported even on rtl-sdr.com coments)
that had no identifiable origin... Until now.
Given the fix, all 32 bit adress targets should be affected as well...
This commit is contained in:
vsonnier 2017-03-08 22:52:20 +01:00
parent 294713945a
commit 97639d1d09
1 changed files with 31 additions and 7 deletions
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38
src/sdr/SoapySDRThread.cpp
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@ -192,12 +192,12 @@ void SDRThread::readStream(SDRThreadIQDataQueue* iqDataOutQueue) {
if (n_overflow > nElems) {
n_overflow = nElems;
}
memcpy(&inpBuffer.data[0], &overflowBuffer.data[0], n_overflow * sizeof(float) * 2);
memcpy(&inpBuffer.data[0], &overflowBuffer.data[0], n_overflow * sizeof(liquid_float_complex));
n_read = n_overflow;
numOverflow -= n_overflow;
if (numOverflow) { // still some left..
memmove(&overflowBuffer.data[0], &overflowBuffer.data[n_overflow], numOverflow * sizeof(float) * 2);
memmove(&overflowBuffer.data[0], &overflowBuffer.data[n_overflow], numOverflow * sizeof(liquid_float_complex));
}
}
@ -219,14 +219,38 @@ void SDRThread::readStream(SDRThreadIQDataQueue* iqDataOutQueue) {
//sucess read beyond nElems, with overflow
if ((n_read + n_stream_read) > nElems) {
memcpy(&inpBuffer.data[n_read], buffs[0], n_requested * sizeof(float) * 2);
//Copy at most n_requested CF32 into inpBuffer.data liquid_float_complex,
//starting at n_read position.
//inspired from SoapyRTLSDR code, this mysterious void** is indeed an array of CF32(real/imag) samples,
//so interpret as a flat (float) array. There is indeed no garanteed that sizeof(liquid_float_complex) = sizeof ("CF32")
//nor that the Re/Im order of fields is the one expected. (hence the swap I/Q option !)
float *pp = (float *)buffs[0];
for (int i = 0; i < n_requested; i++) {
inpBuffer.data[n_read + i].real = pp[2 * i];
inpBuffer.data[n_read + i].imag = pp[2 * i + 1];
}
numOverflow = n_stream_read-n_requested;
liquid_float_complex **pp = (liquid_float_complex **)buffs[0];
pp += n_requested;
memcpy(&overflowBuffer.data[0], pp, numOverflow * sizeof(float) * 2);
//shift of n_requested * CF32 samples
pp += n_requested * 2;
//so push the remainder samples to overflowBuffer:
for (int i = 0; i < numOverflow; i++) {
overflowBuffer.data[i].real = pp[2 * i]; // suppose the real part comes first.
overflowBuffer.data[i].imag = pp[2 * i + 1];
}
n_read += n_requested;
} else if (n_stream_read > 0) {
memcpy(&inpBuffer.data[n_read], buffs[0], n_stream_read * sizeof(float) * 2);
float *pp = (float *)buffs[0];
for (int i = 0; i < n_stream_read; i++) {
inpBuffer.data[n_read + i].real = pp[2 * i]; // suppose the real part comes first.
inpBuffer.data[n_read + i].imag = pp[2 * i + 1];
}
n_read += n_stream_read;
} else {
break;