c++ audio player

pyaudioplayeralsa/src/WavFile.h

@@ -0,0 +1,61 @@
+#pragma once
+
+#include <iostream>
+#include <memory>
+
+template <size_t len>
+std::string readStr(std::istream &str)
+{
+  char buff[len];
+  str.read(buff, len);
+  return std::string(buff, len);
+}
+
+template <typename T>
+T read(std::istream &str)
+{
+  T res;
+  str.read((char *)&res, sizeof(res));
+  return res;
+}
+
+class WavFile
+{
+public:
+  WavFile(std::istream &str)
+  {
+    auto chunkId = readStr<4>(str);
+    auto chunkSize = read<uint32_t>(str);
+    auto format = readStr<4>(str);
+
+    auto subchunk1Id = readStr<4>(str);
+    auto subchunk1Size = read<uint32_t>(str);
+
+    auto audioFormat = read<uint16_t>(str);
+    numChannels_ = read<uint16_t>(str);
+    sampleRate_ = read<uint32_t>(str);
+    auto byteRate = read<uint32_t>(str);
+
+    auto blockAlign = read<uint16_t>(str);
+    bitsPerSample_ = read<uint16_t>(str);
+
+    auto subchunk2Id = readStr<4>(str);
+    dataSize_ = read<uint32_t>(str);
+
+    data_ = std::unique_ptr<char>(new char[dataSize_]);
+    str.read(data_.get(), dataSize_);
+  }
+
+  uint32_t sampleRate() const { return sampleRate_; }
+  uint16_t channels() const { return numChannels_; }
+  uint32_t size() const { return dataSize_; }
+
+  const char *operator[](int offset) const { return &data_.get()[offset]; }
+
+private:
+  std::unique_ptr<char> data_;
+  uint32_t sampleRate_;
+  uint16_t bitsPerSample_;
+  uint32_t dataSize_;
+  uint16_t numChannels_;
+};