ggwave : add default samples per frame

examples/ggwave-common-sdl2.cpp

@@ -227,7 +227,7 @@ bool GGWave_init(
         g_ggWave = new GGWave(
                 g_obtainedSpecIn.freq,
                 g_obtainedSpecOut.freq,
-                1024,
+                GGWave::kDefaultSamplesPerFrame,
                 sampleSizeBytesIn,
                 sampleSizeBytesOut);
     }

include/ggwave/ggwave.h

@@ -7,6 +7,7 @@
 class GGWave {
 public:
     static constexpr auto kBaseSampleRate = 48000.0;
+    static constexpr auto kDefaultSamplesPerFrame = 1024;
     static constexpr auto kMaxSamplesPerFrame = 1024;
     static constexpr auto kMaxDataBits = 256;
     static constexpr auto kMaxDataSize = 256;
@@ -54,6 +55,7 @@ public:
             int samplesPerFrame,
             int sampleSizeBytesIn,
             int sampleSizeBytesOut);
+
     ~GGWave();
 
     bool init(int textLength, const char * stext, const TxProtocol & aProtocol, const int volume);

src/ggwave.cpp

@@ -5,6 +5,7 @@
 #include <chrono>
 #include <algorithm>
 #include <random>
+#include <stdexcept>
 
 namespace {
 
@@ -163,6 +164,10 @@ GGWave::GGWave(
     m_outputBlock(kMaxSamplesPerFrame),
     m_outputBlock16(kMaxRecordedFrames*kMaxSamplesPerFrame)
 {
+    if (samplesPerFrame > kMaxSamplesPerFrame) {
+        throw std::runtime_error("Invalid samples per frame");
+    }
+
     init(0, "", getDefultTxProtocol(), 0);
 }