1 files changed, 400 insertions, 0 deletions
diff --git a/engine/audio/private/voice_record_dsound.cpp b/engine/audio/private/voice_record_dsound.cpp
new file mode 100644
index 0000000..70fc2b6
--- /dev/null
+++ b/engine/audio/private/voice_record_dsound.cpp
@@ -0,0 +1,400 @@
+//========= Copyright � 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+
+// This module implements the voice record and compression functions 
+
+#include "audio_pch.h"
+#if !defined( _X360 )
+#include "dsound.h"
+#endif
+#include <assert.h>
+#include "voice.h"
+#include "tier0/vcrmode.h"
+#include "ivoicerecord.h"
+
+#if defined( _X360 )
+#include "xbox/xbox_win32stubs.h"
+#endif
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+
+// ------------------------------------------------------------------------------
+// Globals.
+// ------------------------------------------------------------------------------
+
+typedef HRESULT (WINAPI *DirectSoundCaptureCreateFn)(const GUID FAR *lpGUID, LPDIRECTSOUNDCAPTURE *pCapture, LPUNKNOWN pUnkOuter);
+
+
+
+// ------------------------------------------------------------------------------
+// Static helpers
+// ------------------------------------------------------------------------------
+
+
+
+// ------------------------------------------------------------------------------
+// VoiceRecord_DSound
+// ------------------------------------------------------------------------------
+
+class VoiceRecord_DSound : public IVoiceRecord
+{
+protected:
+
+	virtual				~VoiceRecord_DSound();
+
+
+// IVoiceRecord.
+public:
+
+						VoiceRecord_DSound();
+	virtual void		Release();
+
+	virtual bool		RecordStart();
+	virtual void		RecordStop();
+	
+	// Initialize. The format of the data we expect from the provider is
+	// 8-bit signed mono at the specified sample rate.
+	virtual bool		Init(int sampleRate);
+
+	virtual void		Idle();
+
+	// Get the most recent N samples.
+	virtual int			GetRecordedData(short *pOut, int nSamplesWanted);
+
+private:
+	void				Term();				// Delete members.
+	void				Clear();			// Clear members.
+	void				UpdateWrapping();
+
+	inline DWORD		NumCaptureBufferBytes()	{return m_nCaptureBufferBytes;}
+
+
+private:
+	HINSTANCE					m_hInstDS;
+
+	LPDIRECTSOUNDCAPTURE		m_pCapture;
+	LPDIRECTSOUNDCAPTUREBUFFER	m_pCaptureBuffer;
+
+	// How many bytes our capture buffer has.
+	DWORD						m_nCaptureBufferBytes;
+	
+	// We need to know when the capture buffer loops, so we install an event and 
+	// update this in the event.
+	DWORD						m_WrapOffset;
+	HANDLE						m_hWrapEvent;
+
+	// This is our (unwrapped) position that tells how much data we've given to the app.
+	DWORD						m_LastReadPos;
+};
+
+
+
+VoiceRecord_DSound::VoiceRecord_DSound()
+{
+	Clear();
+}
+
+
+VoiceRecord_DSound::~VoiceRecord_DSound()
+{
+	Term();
+}
+
+
+void VoiceRecord_DSound::Release()
+{
+	delete this;
+}
+
+
+bool VoiceRecord_DSound::RecordStart()
+{
+	//When we start recording we want to make sure we don't provide any audio
+	//that occurred before now. So set m_LastReadPos to the current
+	//read position of the audio device
+	if (m_pCaptureBuffer == NULL)
+	{
+		return false;
+	}
+
+	Idle();
+
+	DWORD dwStatus;
+	HRESULT hr = m_pCaptureBuffer->GetStatus(&dwStatus);
+	if (FAILED(hr) || !(dwStatus & DSCBSTATUS_CAPTURING))
+		return false;
+
+	DWORD dwReadPos;
+	hr = m_pCaptureBuffer->GetCurrentPosition(NULL, &dwReadPos);
+	if (!FAILED(hr))
+	{
+		m_LastReadPos = dwReadPos + m_WrapOffset;
+	}
+
+	return true;
+}
+
+
+void VoiceRecord_DSound::RecordStop()
+{
+}
+
+static bool IsRunningWindows7()
+{
+	if ( IsPC() )
+	{
+		OSVERSIONINFOEX osvi;
+		ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
+		osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
+
+		if ( GetVersionEx ((OSVERSIONINFO *)&osvi) )
+		{
+			if ( osvi.dwMajorVersion > 6 || (osvi.dwMajorVersion == 6 && osvi.dwMinorVersion >= 1) )
+				return true;
+		}
+	}
+	return false;
+}
+
+bool VoiceRecord_DSound::Init(int sampleRate)
+{
+	HRESULT hr;
+	DSCBUFFERDESC dscDesc;
+	DirectSoundCaptureCreateFn createFn;
+
+	
+	Term();
+
+
+	WAVEFORMATEX recordFormat =
+	{
+		WAVE_FORMAT_PCM,		// wFormatTag
+		1,						// nChannels
+		(uint32)sampleRate,				// nSamplesPerSec
+		(uint32)sampleRate*2,			// nAvgBytesPerSec
+		2,						// nBlockAlign
+		16,						// wBitsPerSample
+		sizeof(WAVEFORMATEX)	// cbSize
+	};
+
+
+	
+	// Load the DSound DLL.
+	m_hInstDS = LoadLibrary("dsound.dll");
+	if(!m_hInstDS)
+		goto HandleError;
+
+	createFn = (DirectSoundCaptureCreateFn)GetProcAddress(m_hInstDS, "DirectSoundCaptureCreate");
+	if(!createFn)
+		goto HandleError;
+
+	const GUID FAR *pGuid = &DSDEVID_DefaultVoiceCapture;
+	if ( IsRunningWindows7() )
+	{
+		pGuid = NULL;
+	}
+	hr = createFn(pGuid, &m_pCapture, NULL);
+	if(FAILED(hr))
+		goto HandleError;
+
+	// Create the capture buffer.
+	memset(&dscDesc, 0, sizeof(dscDesc));
+	dscDesc.dwSize = sizeof(dscDesc);
+	dscDesc.dwFlags = 0;
+	dscDesc.dwBufferBytes = recordFormat.nAvgBytesPerSec;
+	dscDesc.lpwfxFormat = &recordFormat;
+
+	hr = m_pCapture->CreateCaptureBuffer(&dscDesc, &m_pCaptureBuffer, NULL);
+	if(FAILED(hr))
+		goto HandleError;
+
+
+	// Figure out how many bytes we got in our capture buffer.
+	DSCBCAPS caps;
+	memset(&caps, 0, sizeof(caps));
+	caps.dwSize = sizeof(caps);
+
+	hr = m_pCaptureBuffer->GetCaps(&caps);
+	if(FAILED(hr))
+		goto HandleError;
+
+	m_nCaptureBufferBytes = caps.dwBufferBytes;
+
+
+	// Set it up so we get notification when the buffer wraps.
+	m_hWrapEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
+	if(!m_hWrapEvent)
+		goto HandleError;
+
+	DSBPOSITIONNOTIFY dsbNotify;
+	dsbNotify.dwOffset = dscDesc.dwBufferBytes - 1;
+	dsbNotify.hEventNotify = m_hWrapEvent;
+	
+	// Get the IDirectSoundNotify interface.
+	LPDIRECTSOUNDNOTIFY pNotify;
+	hr = m_pCaptureBuffer->QueryInterface(IID_IDirectSoundNotify, (void**)&pNotify);
+	if(FAILED(hr))
+		goto HandleError;
+	
+	hr = pNotify->SetNotificationPositions(1, &dsbNotify);
+	pNotify->Release();
+	if(FAILED(hr))
+		goto HandleError;
+
+	// Start capturing.
+	hr = m_pCaptureBuffer->Start(DSCBSTART_LOOPING);
+	if(FAILED(hr))
+		return false;
+
+	return true;
+
+
+HandleError:;
+	Term();
+	return false;
+}
+
+
+void VoiceRecord_DSound::Term()
+{
+	if(m_pCaptureBuffer)
+		m_pCaptureBuffer->Release();
+
+	if(m_pCapture)
+		m_pCapture->Release();
+
+	if(m_hWrapEvent)
+		DeleteObject(m_hWrapEvent);
+
+	if(m_hInstDS)
+	{
+		FreeLibrary(m_hInstDS);
+		m_hInstDS = NULL;
+	}
+
+	Clear();
+}
+
+
+void VoiceRecord_DSound::Clear()
+{
+	m_pCapture = NULL;
+	m_pCaptureBuffer = NULL;
+	m_WrapOffset = 0;
+	m_LastReadPos = 0;
+	m_hWrapEvent = NULL;
+	m_hInstDS = NULL;
+}
+
+
+void VoiceRecord_DSound::Idle()
+{
+	UpdateWrapping();
+}
+
+int VoiceRecord_DSound::GetRecordedData( short *pOut, int nSamples )
+{
+	if(!m_pCaptureBuffer)
+	{
+		assert(false);
+		return 0;
+	}
+
+	DWORD dwStatus;
+	HRESULT hr = m_pCaptureBuffer->GetStatus(&dwStatus);
+	if(FAILED(hr) || !(dwStatus & DSCBSTATUS_CAPTURING))
+		return 0;
+
+	Idle();	// Update wrapping..
+
+	DWORD nBytesWanted = (DWORD)( nSamples << 1 );
+
+	DWORD dwReadPos;
+	hr = m_pCaptureBuffer->GetCurrentPosition( NULL, &dwReadPos);
+	if(FAILED(hr))
+		return 0;
+
+	dwReadPos += m_WrapOffset;
+
+	// Read the range (dwReadPos-nSamplesWanted, dwReadPos), but don't re-read data we've already read.
+	DWORD readStart = Max( dwReadPos - nBytesWanted, (DWORD)0u );
+	if ( readStart < m_LastReadPos )
+	{
+		readStart = m_LastReadPos;
+	}
+
+	// Lock the buffer.
+	LPVOID pData[2];
+	DWORD dataLen[2];
+
+	hr = m_pCaptureBuffer->Lock(
+		readStart % NumCaptureBufferBytes(),	// Offset.
+		dwReadPos - readStart,					// Number of bytes to lock.
+		&pData[0],								// Buffer 1.
+		&dataLen[0],							// Buffer 1 length.
+		&pData[1],								// Buffer 2.
+		&dataLen[1],							// Buffer 2 length.
+		0										// Flags.
+		);
+
+	if(FAILED(hr))
+		return 0;
+
+	// Hopefully we didn't get too much data back!
+	if((dataLen[0]+dataLen[1]) > nBytesWanted )
+	{
+		assert(false);
+		m_pCaptureBuffer->Unlock(pData[0], dataLen[0], pData[1], dataLen[1]);
+		return 0;
+	}
+
+	// Copy the data to the output.
+	memcpy(pOut, pData[0], dataLen[0]);
+	memcpy(&pOut[dataLen[0]/2], pData[1], dataLen[1]);
+
+	m_pCaptureBuffer->Unlock(pData[0], dataLen[0], pData[1], dataLen[1]);
+
+	// Last Read Position
+	m_LastReadPos = dwReadPos;
+	// Return sample count (not bytes)
+	return (dataLen[0] + dataLen[1]) >> 1;
+}
+
+
+void VoiceRecord_DSound::UpdateWrapping()
+{
+	if(!m_pCaptureBuffer)
+		return;
+
+	// Has the buffer wrapped?
+	if ( VCRHook_WaitForSingleObject(m_hWrapEvent, 0) == WAIT_OBJECT_0 )
+	{
+		m_WrapOffset += m_nCaptureBufferBytes;
+	}
+}
+
+
+
+IVoiceRecord* CreateVoiceRecord_DSound(int sampleRate)
+{
+	VoiceRecord_DSound *pRecord = new VoiceRecord_DSound;
+	if(pRecord && pRecord->Init(sampleRate))
+	{
+		return pRecord;
+	}
+	else
+	{
+		if(pRecord)
+			pRecord->Release();
+
+		return NULL;
+	}
+}
+