/* obuffer.h   Declarations for output buffer, includes operating system   implementation of the virtual Obuffer. Optional routines   enabling seeks and stops added by Jeff Tsay. *//* *  @(#) obuffer.h 1.8, last edit: 6/15/94 16:51:56 *  @(#) Copyright (C) 1993, 1994 Tobias Bading (bading@cs.tu-berlin.de) *  @(#) Berlin University of Technology * *  Idea and first implementation for u-law output with fast downsampling by *  Jim Boucher (jboucher@flash.bu.edu) * *  LinuxObuffer class written by *  Louis P. Kruger (lpkruger@phoenix.princeton.edu) * *  This program is free software; you can redistribute it and/or modify *  it under the terms of the GNU General Public License as published by *  the Free Software Foundation; either version 2 of the License, or *  (at your option) any later version. * *  This program is distributed in the hope that it will be useful, *  but WITHOUT ANY WARRANTY; without even the implied warranty of *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *  GNU General Public License for more details. * *  You should have received a copy of the GNU General Public License *  along with this program; if not, write to the Free Software *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */#ifndef OBUFFER_H#define OBUFFER_H#include "all.h"#include <stdio.h> // needed for definition of NULL#include "args.h"static const uint32 OBUFFERSIZE = 2 * 1152;	// max. 2 * 1152 samples per framestatic const uint32 MAXCHANNELS = 2;         // max. number of channels// Abstract base class for audio output classes:class Obuffer{public:  virtual     ~Obuffer() {}		// dummy#ifdef COOLPRO
  virtual void append(uint32 channel, real value) = 0;
			 // this function takes a 32 Bit float value from -1 to 1
#else
  virtual void append(uint32 channel, int16 value) = 0;
			 // this function takes a 32 Bit float value from -1 to 1
#endif
  virtual void write_buffer(int32 fd) = 0;			 // this function should write the samples to the filedescriptor			 // or directly to the audio hardware
#ifdef COOLPRO
  // OK - appendblock is not used, but it was a stab at speeding things up
  virtual void appendblock(uint32 channel, real * pvalues, int iCount) = 0;
			// this function takes an array of 32 bit float values from -1 to 1
  virtual BYTE * get_buffer(int * piNumBytes) = 0;
			// used in Cool Edit version
#endif#ifdef SEEK_STOP  virtual void clear_buffer() = 0;			 // Clears all data in the buffer (for seeking)  virtual void set_stop_flag() = 0;			 // Notify the buffer that the user has stopped the stream#endif // SEEK_STOP};Obuffer *create_obuffer(MPEG_Args *maplay_args);#ifndef COOLPRO
#include "fileobuf.h"
#endif#ifdef IRIX#include "indigo_obuffer.h"#endif#ifdef SPARC#include "sparc_obuffer.h"#endif#ifdef HPUX#include "hpux_obuffer.h"#endif#if defined(LINUX) || defined(__FreeBSD__)#include "linux_obuffer.h"#endif#ifdef NeXT#include "NeXT_obuffer.h"#endif#ifdef AIX#include "aix_obuffer.h"#endif#ifdef __WIN32__
#ifdef COOLPRO
#include "cep_obuffer.h"
#else#include "mci_obuf.h"
#include "wavefile_obuffer.h"
#endif// #include "ds_obuffer.h"#endif#ifdef BEOS#include "beos_obuffer.h"#endif#ifdef OS2#include "os2_obuffer.h"#endif#endif // OBUFFER_H