/****************************************************************************
 * Signal Source Module for the Real-time BBC Codec/Modem                   *
 ****************************************************************************
 * William L. Bahn                                                          *
 * Academy Center for Information Security                                  *
 * Department of Computer Science                                           *
 * United States Air Force Academy                                          *
 * USAFA, CO 80840                                                          *
 ****************************************************************************
 * FILE:............ source.h                                               *
 * DATE CREATED:.... 08 SEP 07                                              *
 * DATE MODIFIED:... 08 SEP 07                                              *
 ****************************************************************************
 *
 * REVISION HISTORY
 *
 ****************************************************************************
 *
 * DESCRIPTION
 *
 * This module supports the signal source for both the TX and the RX
 *
 */

#ifndef SOURCEdotH
#define SOURCEdotH

//------------------------------------------------------------------------
// REQUIRED INCLUDES
//------------------------------------------------------------------------

#include "config.h"
#include "dirtyd.h"

//------------------------------------------------------------------------
// STRUCTURE DECLARATIONS
//------------------------------------------------------------------------

typedef struct SOURCE SOURCE;

//------------------------------------------------------------------------
// STRUCTURE DEFINITIONS
//------------------------------------------------------------------------

// NOTE: Normally the structure definition would be in the *.c file to make 
// the structure members inaccessible to outside functions except through
// public function calls. But for the real-time code it has been decided 
// to make the structure members directly visible to the functions that
// manipulate them.

struct SOURCE
{
	int   streaming;          // Buffer active flag
	DWORD sample;             // Number of samples that have been processed
	DWORD samples;            // Number of samples in buffer
	DWORD sample_size_bytes;  // Bytes required per sample
	DWORD sample_limit;       // Number of samples space is allocated for
	BYTE *v;                  // Buffer address

	DWORD file_bytes;         // File size based on seek test
	size_t chunk_size;        // File bytes bytes per message
	size_t buffer_size;       // Size of allocated source buffer
};

//------------------------------------------------------------------------
// PUBLIC FUNCTION PROTOTYPES
//------------------------------------------------------------------------

SOURCE *SOURCE_Del(SOURCE *p);
SOURCE *SOURCE_New(CONFIG *c, DWORD *errcode);

//------------------------------------------------------------------------
#endif