simplify encoderparams

examples/src/Main.cpp

@@ -98,7 +98,7 @@ int main()
 	}
     
     // Test wav file encoder
-    encoder.WriteFile({2, 44100, 32, PCM_FLT, DITHER_NONE}, fileData, "encoded.wav");
+    encoder.WriteFile({2, PCM_FLT, DITHER_NONE}, fileData, "encoded.wav");
         
 	return 0;
 }

include/libnyquist/RiffUtils.h

@@ -40,8 +40,6 @@ namespace nqr
 struct EncoderParams
 {
     int channelCount;
-    int sampleRate;
-    int bitDepth;
     PCMFormat targetFormat;
     DitherType dither;
 };

src/RiffUtils.cpp

@@ -53,14 +53,16 @@ WaveChunkHeader nqr::MakeWaveHeader(const EncoderParams param)
 {
     WaveChunkHeader header;
     
+    int bitdepth = GetFormatBitsPerSample(param.targetFormat);
+    
     header.fmt_id = GenerateChunkCode('f', 'm', 't', ' ');
     header.chunk_size = 16;
     header.format = (param.targetFormat <= PCMFormat::PCM_32) ? WaveFormatCode::FORMAT_PCM : WaveFormatCode::FORMAT_IEEE;
     header.channel_count = param.channelCount;
     header.sample_rate = param.sampleRate;
-    header.data_rate = param.sampleRate * param.channelCount * (param.bitDepth / 8);
-    header.frame_size = param.channelCount * (param.bitDepth / 8);
-    header.bit_depth = param.bitDepth;
+    header.data_rate = param.sampleRate * param.channelCount * (bitdepth / 8);
+    header.frame_size = param.channelCount * (bitdepth/ 8);
+    header.bit_depth = bitdepth;
     
     return header;
 }