Make sound format support optional

[libs/al.git] / source / mad / mp3decoder.h

diff --git a/source/mad/mp3decoder.h b/source/mad/mp3decoder.h
new file mode 100644 (file)
index 0000000..ce0c468
--- /dev/null
+++ b/source/mad/mp3decoder.h
@@ -0,0 +1,54 @@
+#ifndef MSP_AL_MP3DECODER_H_
+#define MSP_AL_MP3DECODER_H_
+
+#include <stdexcept>
+#include <msp/al/sounddecoder.h>
+
+namespace Msp {
+namespace AL {
+
+class mp3_error: public std::runtime_error
+{
+public:
+       mp3_error(const std::string &, int);
+       virtual ~mp3_error() throw() { }
+
+private:
+       static std::string get_message(int);
+};
+
+
+/**
+Decoder for MPEG-2 audio files, a.k.a. MP2 and MP3 files.  Normally you should
+use one of the SoundDecoder::open_* functions to create a decoder.
+*/
+class Mp3Decoder: public SoundDecoder
+{
+private:
+       struct Private;
+
+       Private *priv;
+       IO::Seekable &in;
+       unsigned in_buf_size;
+       char *in_buffer;
+       unsigned read_pos;
+
+public:
+       Mp3Decoder(IO::Seekable &);
+       virtual ~Mp3Decoder();
+
+       static bool detect(const std::string &);
+
+       virtual void seek(unsigned);
+       virtual unsigned read(char *, unsigned);
+
+private:
+       bool fill_input();
+       bool try_decode(bool);
+       bool decode(bool);
+};
+
+} // namespace AL
+} // namespace Msp
+
+#endif