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