Backported RIFF library from Pro edition

lib/riff.h

@@ -0,0 +1,79 @@
+#pragma once
+#include "bitfields.h"
+#include "defines.h"
+#include <string>
+
+namespace RIFF{
+
+  /// Basic RIFF chunk class - can only read type and size.
+  /// All RIFF chunks have this format.
+  class Chunk{
+  public:
+    Chunk(const void *_p = 0, uint32_t len = 0);
+    Chunk(void *_p, const char * t, uint32_t len);
+    inline operator bool() const{return p;}
+    inline std::string getType() const{
+      if (!p){return "";}
+      return std::string(p, 4);
+    }
+    inline uint32_t getPayloadSize() const{
+      if (!p){return 0;}
+      return Bit::btohl_le(p + 4);
+    }
+    virtual void toPrettyString(std::ostream &o, size_t indent = 0) const;
+
+  protected:
+    const char *p;
+  };
+
+  /// List-type RIFF chunk. Can read list identifier.
+  /// "RIFF" and "LIST" type chunks follow this format.
+  class ListChunk : public Chunk{
+  public:
+    ListChunk(const void *_p = 0, uint32_t len = 0) : Chunk(_p, len){}
+    inline std::string getIdentifier() const{
+      if (!p){return "";}
+      return std::string(p + 8, 4);
+    }
+    virtual void toPrettyString(std::ostream &o, size_t indent = 0) const;
+  };
+
+  /// WAVE "fmt " class.
+  class fmt : public Chunk{
+  public:
+    static std::string generate(uint16_t format, uint16_t channels, uint32_t hz, uint32_t bps, uint16_t blocksize, uint16_t size);
+    fmt(const void *_p = 0, uint32_t len = 0) : Chunk(_p, len){}
+    uint16_t getFormat() const;
+    std::string getCodec() const;
+    uint16_t getChannels() const;
+    uint32_t getHz() const;
+    uint32_t getBPS() const;
+    uint16_t getBlockSize() const;
+    uint16_t getSize() const;
+    uint16_t getExtLen() const;
+    uint16_t getValidBits() const;
+    uint32_t getChannelMask() const;
+    std::string getGUID() const;
+    virtual void toPrettyString(std::ostream &o, size_t indent = 0) const;
+  };
+  
+  /// WAVE fact class.
+  class fact : public Chunk {
+  public:
+    static std::string generate(uint32_t samples);
+    fact(const void *_p = 0, uint32_t len = 0) : Chunk(_p, len){}
+    uint32_t getSamplesPerChannel() const;
+    virtual void toPrettyString(std::ostream &o, size_t indent = 0) const;
+  };
+
+  /// ISFT class. Contains software name.
+  class ISFT : public Chunk {
+  public:
+    ISFT(const void *_p = 0, uint32_t len = 0) : Chunk(_p, len){}
+    std::string getSoftware() const;
+    virtual void toPrettyString(std::ostream &o, size_t indent = 0) const;
+  };
+
+
+}
+