VC++视频开发实例集锦(包括“远程视频监控”"语音识别系统"等13个经典例子)

				/* args.h
				
					An abstract class to pass values to maplay and other worker
				   threads.
				
					From the Win32 API, we can only pass one 32-bit value to a thread. This will
				   be a pointer to a object of this class. The Args class contains the seeking
				   control variables needed for both MPEG and MCI files.
				
				   Added stop and done variables and functions for terminating the
				   threads from outside.
				
				   This class should be used to pass arguments to maplay(),
				   and to initialize the Obuffer's. */
				
				#ifndef ARGS_H
				#define ARGS_H
				
				#ifdef __WIN32__
				#define STRICT
				#include 
				#include 
				enum e_output { O_WAVEMAPPER, O_DIRECTSOUND, O_WAVEFILE };
				#endif // __WIN32__
				
				#include "all.h"
				#include "ibitstr.h"
				#include "header.h"
				
				#ifdef SEEK_STOP
				#include "mutx_imp.h"
				#endif
				
				class Args
				{
					public:
				
					Args()
				   {
				
				#ifdef SEEK_STOP
						mutex 			  = NULL;
				   	stop             = false;
				      done             = false;
				      desired_position = 0;
				      position_change  = false;
				#endif // SEEK_STOP
				
				#ifdef WIN32GUI
				   	hWnd             = NULL;
				#endif // WIN32GUI
				   }
				
					virtual ~Args() {}
				
				#ifdef SEEK_STOP
					_Mutex mutex;
				   volatile bool  stop;
				   volatile bool  done;
				  	volatile int32 desired_position;
					volatile bool  position_change;
				#endif // SEEK_STOP
				
				#ifdef WIN32GUI
					HWND hWnd;
				#endif // WIN32GUI
				
				};
				
				// A class to contain arguments for maplay.
				class MPEG_Args : public Args
				{
				public:
				
					MPEG_Args()
					{
						stream = NULL;
						MPEGheader = NULL;
						which_c = both;
					   use_own_scalefactor = false;
				   	scalefactor = 32768.0;
				
				#ifdef __WIN32__
				  		phwo = NULL;
				      output_mode = O_WAVEMAPPER;
				#endif // __WIN32__
				
				      stdout_mode   = false;
				      verbose_mode  = false;
				
				#if defined(SPARC) || defined(HPUX)
				   	use_speaker   = false;
				      use_headphone = false;
				      use_line_out  = false;
				#endif // SPARC || HPUX
				
				#if defined(SPARC) && defined(ULAW)
						force_amd     = false;
				#endif // SPARC && ULAW
				
				#if defined(SPARC) || defined(HPUX) || defined(AIX)
				      volume = -1.0f;
				#endif // SPARC || HPUX || AIX
				
				#ifdef HPUX
						wait_if_busy = false;
				#endif
				  	}
				
					Ibitstream *stream;
					Header *MPEGheader;
					enum e_channels which_c;
				
				   bool use_own_scalefactor;
				   real scalefactor;
				
				#ifdef __WIN32__
					HWAVEOUT *phwo;
				   enum e_output output_mode;
					char output_filename[256];
				#endif // __WIN32__
				
				   bool stdout_mode;
				   bool verbose_mode;
				
				#if defined(SPARC) || defined(HPUX)
				   bool use_speaker;
				   bool use_headphone;
				   bool use_line_out;
				#endif // SPARC || HPUX
				
				#if defined(SPARC) && defined(ULAW)
					bool force_amd;
				#endif // SPARC && ULAW
				
				#if defined(SPARC) || defined(HPUX) || defined(AIX)
				   float volume;
				#endif // SPARC || HPUX || AIX
				
				#ifdef HPUX
					bool wait_if_busy;
				#endif // HPUX
				
					~MPEG_Args() { }
				};
				
				#ifdef __WIN32__
				// A class to hold the arguments for MCI playing.
				class MCI_Args : public Args {
				
				public:
					MCI_Args()
					{
						playing = false;
				      CDMode  = false;
				      final_track = false;
				      length = 0;
				
				      lstrcpy(this_track_str, "1");
				      lstrcpy(next_track_str, "2");
					}
				
				   ~MCI_Args() { }
				
				   bool CDMode;
				   bool final_track;
				   char this_track_str[8];
				   char next_track_str[8];
				   int  length;
				
					volatile bool playing;
				};
				#endif // __WIN32__
				
				#endif // ARGS_H