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465 lines
12 KiB
C++
465 lines
12 KiB
C++
// MediaParams.cpp: implementation of the CMediaParams class.
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//
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//////////////////////////////////////////////////////////////////////
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#include "stdafx.h"
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#include "AudioPlugIn.h"
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#include "MediaParams.h"
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#include "ParamEnvelope.h"
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#include "CakeMedParam_i.c"
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#define DEFINE_PARAM_INFO
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#include "Parameters.h"
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//////////////////////////////////////////////////////////////////////
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// Ctors
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CMediaParams::CMediaParams( IUnknown* pUnkOuter ) : m_pUnkOuter(pUnkOuter)
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{
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m_pCallback = NULL;
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m_cRef = 0;
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m_aEnv = NULL;
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m_dDecimationInterval = 20.0 / 1000.0; // 20 msec
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m_lFs = 44100;
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}
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CMediaParams::~CMediaParams()
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{
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ASSERT( 0 == m_cRef );
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if (m_pCallback)
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m_pCallback->Release();
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m_pCallback = NULL;
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m_pUnkOuter = NULL;
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delete [] m_aEnv;
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m_aEnv = NULL;
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}
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//////////////////////////////////////////////////////////////////////
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// Factory-style construction
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HRESULT CMediaParams::Create( CMediaParams** ppObj, IUnknown* pUnkOuter )
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{
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if (NULL == ppObj)
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return E_POINTER;
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if (NULL == pUnkOuter)
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return E_POINTER;
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// Construct the CMediaParams object
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CMediaParams* pNew = new CMediaParams( pUnkOuter );
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if (NULL == pNew)
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return E_OUTOFMEMORY;
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// Construct and initialize its parameters
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pNew->m_aEnv = new CParamEnvelope [ NUM_PARAMS ];
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if (NULL == pNew->m_aEnv)
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return E_OUTOFMEMORY;
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for (ULONG ix = 0; ix < NUM_PARAMS; ++ix)
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pNew->m_aEnv[ ix ].SetParamInfo( m_aParamInfo[ ix ] );
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pNew->AddRef();
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*ppObj = pNew;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Given a sample range, fills pTimes with sample positions where we need
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// to recompute one or more automated parameter values. Positions are always
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// added periodically at the decimation interval; positions are also added
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// for every segment boundary among all of the parameters.
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HRESULT CMediaParams::GetDecimationTimes( LONGLONG llSampStart,
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LONGLONG llSampEnd,
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std::vector<LONGLONG>* pTimes )
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{
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LONGLONG const llInterval = static_cast<LONGLONG>( GetDecimationInterval() * GetSampleRate() );
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double const dSamplesPerRefTime = static_cast<double>( GetSampleRate() ) / UNITS;
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REFERENCE_TIME const rtStart = REFERENCE_TIME( llSampStart / dSamplesPerRefTime + 0.5 );
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// Make an worst-case guess at how many decimation points we'll need
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ULONG uPoints = 0;
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for (DWORD dwParam = 0; dwParam < NUM_AUTOMATED_PARAMS; dwParam++)
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{
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const CParamEnvelope& env = m_aEnv[ dwParam ];
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uPoints += env.GetCount() * 2;
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}
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// If there is no automation, then there is no need to decimate
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if (0 == uPoints)
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return S_OK;
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// Account for points that are added due to periodic decimation
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uPoints += ULONG( ((llSampEnd - llSampStart) / llInterval) + 1 );
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// Reserve some memory for landmark points
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pTimes->reserve( uPoints );
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// Add periodic landmarks at the decimation interval
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LONGLONG llSamp = (llSampStart / llInterval) * llInterval;
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if (llSamp < llSampStart)
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llSamp += llInterval;
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while (llSamp < llSampEnd)
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{
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pTimes->push_back( llSamp );
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llSamp += llInterval;
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}
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// Add landmarks for each shape boundary
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for (dwParam = 0; dwParam < NUM_AUTOMATED_PARAMS; dwParam++)
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{
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const CParamEnvelope& env = m_aEnv[ dwParam ];
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unsigned const nCount = env.GetCount();
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// Add each shape endpoint that falls in our time range
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for (unsigned ix = 0; ix < nCount; ix++)
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{
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const MP_ENVELOPE_SEGMENT& seg = env.GetAt( ix );
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LONGLONG const llEnvStart = static_cast<LONGLONG>( seg.rtStart * dSamplesPerRefTime + 0.5 );
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LONGLONG const llEnvEnd = static_cast<LONGLONG>( seg.rtEnd * dSamplesPerRefTime + 0.5 );
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if (llSampStart <= llEnvStart && llEnvStart < llSampEnd)
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pTimes->push_back( llEnvStart );
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if (llSampStart <= llEnvEnd && llEnvEnd < llSampEnd)
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pTimes->push_back( llEnvEnd );
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}
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}
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// Sort result
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std::sort( pTimes->begin(), pTimes->end() );
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Set the current position among all parameters, updating current envelope
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// value and deltas. This method is called repeatedly by the streaming code,
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// to update parameter values as they evolve along the duration of the envelope.
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HRESULT CMediaParams::UpdateValuesForSample( LONGLONG llSamp )
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{
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double const dSamplesPerRefTime = static_cast<double>( GetSampleRate() ) / UNITS;
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REFERENCE_TIME const rt = REFERENCE_TIME( llSamp / dSamplesPerRefTime + 0.5 );
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HRESULT hr = S_OK;
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for (DWORD dwParam = 0; dwParam < NUM_AUTOMATED_PARAMS; dwParam++)
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{
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hr = m_aEnv[ dwParam ].UpdateValuesForRefTime( rt, GetSampleRate() );
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if (FAILED( hr ))
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break;
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}
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return hr;
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}
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////////////////////////////////////////////////////////////////////////////////
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// IUnknown
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HRESULT CMediaParams::QueryInterface( REFIID riid, void** ppv )
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{
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if (NULL == ppv)
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return E_POINTER;
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if (riid == IID_IUnknown)
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{
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*ppv = static_cast<IUnknown*>( static_cast<IMediaParams*>( this ) );
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m_pUnkOuter->AddRef();
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return S_OK;
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}
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else
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{
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return m_pUnkOuter->QueryInterface( riid, ppv );
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}
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}
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ULONG CMediaParams::AddRef()
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{
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return InterlockedIncrement( &m_cRef );
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}
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ULONG CMediaParams::Release()
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{
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ASSERT( m_cRef > 0 );
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ULONG ul = InterlockedDecrement( &m_cRef );
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if (0 == ul)
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{
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delete this;
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return 0;
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}
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else
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return ul;
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}
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////////////////////////////////////////////////////////////////////////////////
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// IMediaParams
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HRESULT CMediaParams::GetParam(ULONG dwParamIndex, FLOAT* pValue)
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{
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if (dwParamIndex >= NUM_PARAMS)
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return E_INVALIDARG;
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if (NULL == pValue)
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return E_POINTER;
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return m_aEnv[ dwParamIndex ].GetParam( pValue );
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::SetParam(ULONG dwParamIndex, FLOAT value)
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{
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if (dwParamIndex >= NUM_PARAMS)
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return E_INVALIDARG;
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return m_aEnv[ dwParamIndex ].SetParam( value );
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::AddEnvelope(ULONG dwParamIndex, ULONG cSegments, MP_ENVELOPE_SEGMENT* pmpes)
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{
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if (dwParamIndex >= NUM_AUTOMATED_PARAMS && dwParamIndex != DWORD_ALLPARAMS)
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return E_INVALIDARG;
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if (0 == cSegments)
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return S_OK;
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if (IsBadReadPtr( pmpes, cSegments * sizeof(MP_ENVELOPE_SEGMENT) ))
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return E_POINTER;
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double const dSamplesPerRefTime = static_cast<double>( GetSampleRate() ) / UNITS;
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if (dwParamIndex == DWORD_ALLPARAMS)
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{
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for (ULONG ix = 0; ix < NUM_AUTOMATED_PARAMS; ix++)
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{
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HRESULT hr = m_aEnv[ ix ].AddEnvelope( cSegments, pmpes, dSamplesPerRefTime );
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if (FAILED( hr ))
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return hr;
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}
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return S_OK;
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}
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else
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{
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return m_aEnv[ dwParamIndex ].AddEnvelope( cSegments, pmpes, dSamplesPerRefTime );
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::FlushEnvelope(ULONG dwParamIndex, REFERENCE_TIME rtStart, REFERENCE_TIME rtEnd)
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{
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if (dwParamIndex >= NUM_AUTOMATED_PARAMS && dwParamIndex != DWORD_ALLPARAMS)
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return E_INVALIDARG;
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if (rtStart > rtEnd)
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return E_INVALIDARG;
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double const dSamplesPerRefTime = static_cast<double>( GetSampleRate() ) / UNITS;
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if (dwParamIndex == DWORD_ALLPARAMS)
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{
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for (ULONG ix = 0; ix < NUM_AUTOMATED_PARAMS; ix++)
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{
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HRESULT hr = m_aEnv[ ix ].FlushEnvelope( rtStart, rtEnd, dSamplesPerRefTime );
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if (FAILED( hr ))
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return hr;
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}
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return S_OK;
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}
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else
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{
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HRESULT hr = m_aEnv[ dwParamIndex ].FlushEnvelope( rtStart, rtEnd, dSamplesPerRefTime );
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if (FAILED( hr ))
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return hr;
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}
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::SetTimeFormat(GUID guidTimeFormat, ULONG mpTimeData)
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{
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if (guidTimeFormat != GUID_TIME_REFERENCE)
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return E_INVALIDARG;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// IMediaParamInfo
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HRESULT CMediaParams::GetParamCount(ULONG* pdwParams)
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{
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if (NULL == pdwParams)
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return E_POINTER;
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*pdwParams = NUM_AUTOMATED_PARAMS;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::GetParamInfo(ULONG dwParamIndex, MP_PARAMINFO* pInfo)
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{
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if (dwParamIndex >= NUM_AUTOMATED_PARAMS)
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return E_INVALIDARG;
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if (IsBadWritePtr( pInfo, sizeof(MP_PARAMINFO) ))
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return E_POINTER;
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*pInfo = m_aParamInfo[ dwParamIndex ].mppi;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::GetParamText(ULONG dwParamIndex, WCHAR** ppwchText)
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{
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if (dwParamIndex >= NUM_AUTOMATED_PARAMS)
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return E_INVALIDARG;
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if (NULL == ppwchText)
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return E_POINTER;
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const ParamInfo& info = m_aParamInfo[ dwParamIndex ];
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const MP_PARAMINFO& mppi = info.mppi;
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// Count up lengths of label and unit strings, plus null terminators
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int cch = wcslen(mppi.szLabel) + wcslen(mppi.szUnitText) + 3;
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// Add in length of the enum. text if any was supplied
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if (NULL != info.pwszEnumText)
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cch += wcslen(info.pwszEnumText) + 1;
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// Allocate memory for the returned string
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*ppwchText = (WCHAR*)CoTaskMemAlloc( sizeof(WCHAR) * cch );
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if (NULL == *ppwchText)
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return E_OUTOFMEMORY;
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// Text format is "Name\0Units\0Enum1\0Enum2\0...EnumN\0\0"
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WCHAR* pwsz = *ppwchText;
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// [1] Copy in the name
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wcscpy( pwsz, mppi.szLabel );
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pwsz += wcslen(mppi.szLabel) + 1;
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// [2] Copy in the units
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wcscpy( pwsz, mppi.szUnitText );
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pwsz += wcslen(mppi.szUnitText) + 1;
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// [3] Copy in the enum. text, if any was supplied
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if (NULL != info.pwszEnumText)
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{
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wcscpy( pwsz, info.pwszEnumText );
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// Replace commas with nulls, to conform to DX8 string format spec
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while (*pwsz)
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{
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if (*pwsz == L',')
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*pwsz = 0;
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pwsz++;
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}
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}
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::GetNumTimeFormats(ULONG* pdwNumTimeFormats)
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{
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if (NULL == pdwNumTimeFormats)
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return E_POINTER;
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*pdwNumTimeFormats = 1;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::GetSupportedTimeFormat(ULONG dwFormatIndex, GUID* pguidTimeFormat)
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{
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if (NULL == pguidTimeFormat)
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return E_POINTER;
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if (0 != dwFormatIndex)
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return E_INVALIDARG;
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*pguidTimeFormat = GUID_TIME_REFERENCE;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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HRESULT CMediaParams::GetCurrentTimeFormat(GUID* pguidTimeFormat, ULONG*)
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{
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if (NULL == pguidTimeFormat)
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return E_POINTER;
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*pguidTimeFormat = GUID_TIME_REFERENCE;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// IMediaParamsSetUICallback
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HRESULT CMediaParams::SetUICallback(IMediaParamsUICallback* pICallback)
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{
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if (pICallback)
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pICallback->AddRef();
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if (m_pCallback)
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m_pCallback->Release();
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m_pCallback = pICallback;
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return S_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// IMediaParamsUICallback
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HRESULT CMediaParams::ParamsBeginCapture(DWORD *aIndex, DWORD cPoints)
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{
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HRESULT hr = S_OK;
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// Inform each parameter that capture has begun
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for (DWORD ix = 0; ix < cPoints; ix++)
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m_aEnv[ aIndex[ ix ] ].BeginCapture();
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if (m_pCallback)
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hr = m_pCallback->ParamsBeginCapture( aIndex, cPoints );
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return hr;
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}
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HRESULT CMediaParams::ParamsChanged(DWORD *aIndex, DWORD cPoints, MP_DATA *paData)
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{
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HRESULT hr = S_OK;
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// Send the parameter change to each parameter
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for (DWORD ix = 0; ix < cPoints; ix++)
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{
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hr = SetParam( aIndex[ ix ], paData[ ix ] );
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if (FAILED( hr ))
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return hr;
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}
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// Send the parameter change to our callback
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if (m_pCallback)
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hr = m_pCallback->ParamsChanged( aIndex, cPoints, paData );
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return hr;
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}
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HRESULT CMediaParams::ParamsEndCapture(DWORD *aIndex, DWORD cPoints)
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{
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HRESULT hr = S_OK;
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// Inform each parameter that capture has ended
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for (DWORD ix = 0; ix < cPoints; ix++)
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m_aEnv[ aIndex[ ix ] ].EndCapture();
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if (m_pCallback)
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hr = m_pCallback->ParamsEndCapture( aIndex, cPoints );
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return hr;
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}
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////////////////////////////////////////////////////////////////////////////////
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