http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/wvstreams/wvdsp.h

/* -*- Mode: C++ -*- * Worldvisions Weaver Software: * Copyright (C) 1997-2002 Net Integration Technologies, Inc. * * One more attempt at making a decent stream for Linux /dev/dsp. This is * apparently much trickier than it looks. */ #ifndef __WVDSP_H #define __WVDSP_H #include "wvmagiccircle.h" #include "wvloopback.h" #include "wvlog.h" #include "wvrateadjust.h" /** * Class to access the /dev/dsp device in a way that's sane enough for * full-duplex access. * * This is still rather heavily under construction at this time, so * please don't count on any side-effects to make anything * built with this class to work. */ class WvDsp : public WvStream { public: /** * Construct a /dev/dsp accessor object * msec_latency = number of milliseconds of latency that are permissible * srate = sampling rate ( 44, 22, 11, or 8 Hz ) * bits = bits per sample ( 8 or 16 ) * stereo = should this be a stereo stream? * readable/writeable = should this stream be readable and/or writeable * realtime = should the stream give itself realtime priority (needs root) * oss = is this a real OSS driver (not ALSA's OSS emulation)? */ WvDsp(int msec_latency, int srate, int bits, bool stereo, bool readable = true, bool writable = true, bool _realtime = false, bool _oss = false); virtual ~WvDsp(); size_t ispace(); size_t ospace(); void realtime(); /*** Overridden members ***/ virtual bool pre_select(SelectInfo &si); virtual bool post_select(SelectInfo &si); virtual size_t uread(void *buf, size_t len); virtual size_t uwrite(const void *buf, size_t len); virtual bool isok() const; virtual void close(); private: bool setioctl(int ctl, int param); void subproc(bool reading, bool writing); size_t do_uread(void *buf, size_t len); size_t do_uwrite(const void *buf, size_t len); size_t frag_size, num_frags; WvLog log; WvMagicCircle rcircle, wcircle; WvDynBuf rbuf, wbuf; WvLoopback rloop, wloop; WvRateAdjust inrate, outrate; int fd; bool is_realtime; }; #endif // __WVDSP_H