DirectSound - FullDuplex

[sn3ak87]

Hallo,

ich bin gerade dabei DirectSoundFullDuplex zu initialisieren und zum Laufen zu bringen. Wenn ich mein Projekt compiliere, bringt er mir auch keinen Fehler und so, jedoch weiß ich nicht, ob ich es bisher richtig gemacht habe.

Woran erkenne ich, ob die Aufnahme und Ausgabe funktioniert? Also mein Vorhaben ist folgendes:

Ich will mittels DirectSound einen Sound beliebiger Quellen aufnehmen und direkt an die Soundkarte weiterleiten. Das Programm soll dabei später eine Schnittstelle zwischen zwei Programmen sein. Aber, um die Lösung des Problems erst einmal in der Funktionalität zu begreifen, wollte ich eben erst einmal eine solche FullDuplex Methode probieren.

Könntet ihr mir Tipps geben, die mich an mein Ziel bringen?

Danke euch schonmal dafür!

Hier der Quellcode (Visual Studio 2008 Prof. - MFC):

// dsCaptureWavDlg.cpp : implementation file
//

#include "stdafx.h"
#include "dsCaptureWav.h"
#include "dsCaptureWavDlg.h"
#include <windows.h>
#include <mmsystem.h>
#include <dsound.h>
#include <iostream>
#include <stdio.h>
#include <string>
#include <vector>

#pragma comment(lib, "winmm.lib")
#pragma comment(lib, "dsound.lib")

using namespace std;

#ifdef _DEBUG
#define new DEBUG_NEW
#endif
#define SAMPLERATE                44100      ///< [Hz]
#define NOTIFY_SIZE					(SAMPLERATE/50*2)  ///< 1920 [Bytes] = 960 Samples (16bit)
#define NUM_CAPTURE_NOTIFICATIONS   4
#define NUM_BUFFER_SEGMENTS         4        ///< 4 Buffer Segments in the ring buffer

//directsound variablen

HRESULT	hr;
LPDIRECTSOUND8 directSound;
LPDIRECTSOUNDFULLDUPLEX dsFD;
WAVEFORMATEX wfx;

//Input
LPDIRECTSOUNDCAPTURE8 dsCapture;
LPDIRECTSOUNDCAPTUREBUFFER8 dsbCapture;
DSCBUFFERDESC dsCBufferDesc;

//Output
LPDIRECTSOUNDBUFFER8 dsbSound;
DSBUFFERDESC dsBufferDesc;

//Buffer Notifications
DWORD dwCapturePos;
DWORD dwReadPos;

//Lock Parameter
DWORD dwOffset;
DWORD dwBytes;
DWORD dwNotifySize;
DWORD dwBufferSize;

VOID* lockedBufferPointer = NULL;
DWORD lockedBufferSize;

VOID* lockedBufferPointer2 = NULL;
DWORD lockedBufferSize2;

DSCCAPS caps;

// CdsCaptureWavDlg dialog

CdsCaptureWavDlg::CdsCaptureWavDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CdsCaptureWavDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CdsCaptureWavDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CdsCaptureWavDlg, CDialog)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDOK, &CdsCaptureWavDlg::OnBnClickedOk)
	ON_BN_CLICKED(IDCANCEL, &CdsCaptureWavDlg::OnBnClickedCancel)
END_MESSAGE_MAP()

// CdsCaptureWavDlg message handlers

BOOL CdsCaptureWavDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// TODO: Add extra initialization here

	//Waveformatex
	wfx.cbSize = 0;
	wfx.nAvgBytesPerSec = 176400;
	wfx.nBlockAlign = 4;
	wfx.nChannels = 2;
	wfx.nSamplesPerSec = 44100;
	wfx.wBitsPerSample = 16;
	wfx.wFormatTag = WAVE_FORMAT_PCM;

	//directsoundCaptureBuffer
	ZeroMemory(&dsCBufferDesc, sizeof(DSCBUFFERDESC));
	dsCBufferDesc.dwSize = sizeof(DSCBUFFERDESC);
	dsCBufferDesc.dwFlags = 0;
	dsCBufferDesc.dwBufferBytes = wfx.nAvgBytesPerSec;
	dsCBufferDesc.dwReserved = 0;
	dsCBufferDesc.lpwfxFormat = &wfx;
	dsCBufferDesc.dwFXCount = 0;
	dsCBufferDesc.lpDSCFXDesc = NULL;

	//directSoundBuffer
	ZeroMemory(&dsBufferDesc, sizeof(DSBUFFERDESC)); 
	dsBufferDesc.dwSize = sizeof(DSBUFFERDESC); 
	dsBufferDesc.dwFlags = DSBCAPS_CTRLPAN | DSBCAPS_CTRLVOLUME | DSBCAPS_CTRLFREQUENCY | DSBCAPS_GLOBALFOCUS; 
	dsBufferDesc.dwBufferBytes = 3 * wfx.nAvgBytesPerSec; 
	dsBufferDesc.lpwfxFormat = &wfx; 

	//directsound init
	if(DirectSoundCreate8(NULL, &directSound, NULL)!=DS_OK)
		return FALSE;

	if(DirectSoundCaptureCreate8(NULL, &dsCapture, NULL)!=DS_OK)
		return FALSE;

	//if(dsCapture->GetCaps(::TODO::)!=DS_OK)
	//	return FALSE;

	if(DirectSoundFullDuplexCreate8(NULL, NULL, &dsCBufferDesc, &dsBufferDesc, (HWND)this->GetForegroundWindow(), DSSCL_NORMAL, &dsFD, &dsbCapture, &dsbSound, NULL)!=DS_OK)
		return FALSE;

	if(dsFD->Initialize(NULL, NULL, &dsCBufferDesc, &dsBufferDesc, (HWND)this->GetForegroundWindow(), DSSCL_NORMAL, &dsbCapture, &dsbSound)!=DS_OK)
		return FALSE;

	return TRUE;  // return TRUE  unless you set the focus to a control
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CdsCaptureWavDlg::OnPaint()
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this function to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CdsCaptureWavDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CdsCaptureWavDlg::OnBnClickedOk()
{
	// TODO: Add your control notification handler code here
	string capPos, readPos;

	caps.dwSize=sizeof(caps);
	dsCapture->GetCaps(&caps);
	dsbCapture->Start(DSCBSTART_LOOPING);

	dsbCapture->GetCurrentPosition(&dwCapturePos, &dwReadPos);

	//Create the capture buffer
	dwNotifySize  = NOTIFY_SIZE;
	dwNotifySize -= dwNotifySize % wfx.nBlockAlign;	
	dwBufferSize  = dwNotifySize * NUM_BUFFER_SEGMENTS;

	dsbCapture->Lock(dwCapturePos, dwNotifySize, &lockedBufferPointer, &lockedBufferSize, &lockedBufferPointer2, &lockedBufferSize2, 0L ); 
	//dsbCapture->Unlock(...);

}

void CdsCaptureWavDlg::OnBnClickedCancel()
{
	// TODO: Add your control notification handler code here

	//dsbCapture->Stop();
	OnCancel();
}