LimeSDR output: use a stream FIFO size about 10% for a 5 MS/s rate (512k)

debian/changelog

@@ -1,7 +1,6 @@
 sdrangel (3.5.5-1) unstable; urgency=medium
 
   * Output plugins: use fixed time length for sample FIFO
-  * Audio modulators: reduce audio input file buffer to 0.25s
 
  -- Edouard Griffiths, F4EXB <f4exb06@gmail.com>  Sun, 13 Aug 2017 23:14:18 +0200
 

plugins/samplesink/limesdroutput/limesdroutput.cpp

@@ -165,7 +165,7 @@ bool LimeSDROutput::openDevice()
     // set up the stream
 
     m_streamId.channel =  m_deviceShared.m_channel; // channel number
-    m_streamId.fifoSize = 5000000;                  // fifo size in samples
+    m_streamId.fifoSize = 512 * 1024;               // fifo size in samples (SR / 10 take ~5MS/s)
     m_streamId.throughputVsLatency = 0.0;           // optimize for min latency
     m_streamId.isTx = true;                         // TX channel
     m_streamId.dataFmt = lms_stream_t::LMS_FMT_I12; // 12-bit integers