Sweden-Number/dlls/strmbase/seeking.c

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/*
* Filter Seeking and Control Interfaces
*
* Copyright 2003 Robert Shearman
* Copyright 2010 Aric Stewart, CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
/* FIXME: critical sections */
#define COBJMACROS
#include "dshow.h"
#include "wine/strmbase.h"
#include "uuids.h"
#include "wine/debug.h"
#include <assert.h>
WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
HRESULT SourceSeeking_Init(SourceSeeking *pSeeking, const IMediaSeekingVtbl *Vtbl, SourceSeeking_ChangeStop fnChangeStop, SourceSeeking_ChangeStart fnChangeStart, SourceSeeking_ChangeRate fnChangeRate, PCRITICAL_SECTION crit_sect)
{
assert(fnChangeStop && fnChangeStart && fnChangeRate);
pSeeking->lpVtbl = Vtbl;
pSeeking->refCount = 1;
pSeeking->fnChangeRate = fnChangeRate;
pSeeking->fnChangeStop = fnChangeStop;
pSeeking->fnChangeStart = fnChangeStart;
pSeeking->dwCapabilities = AM_SEEKING_CanSeekForwards |
AM_SEEKING_CanSeekBackwards |
AM_SEEKING_CanSeekAbsolute |
AM_SEEKING_CanGetStopPos |
AM_SEEKING_CanGetDuration;
pSeeking->llCurrent = 0;
pSeeking->llStop = ((ULONGLONG)0x80000000) << 32;
pSeeking->llDuration = pSeeking->llStop;
pSeeking->dRate = 1.0;
pSeeking->timeformat = TIME_FORMAT_MEDIA_TIME;
pSeeking->crst = crit_sect;
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p)\n", pCapabilities);
*pCapabilities = This->dwCapabilities;
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_CheckCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
{
SourceSeeking *This = (SourceSeeking *)iface;
HRESULT hr;
DWORD dwCommonCaps;
TRACE("(%p)\n", pCapabilities);
if (!pCapabilities)
return E_POINTER;
dwCommonCaps = *pCapabilities & This->dwCapabilities;
if (!dwCommonCaps)
hr = E_FAIL;
else
hr = (*pCapabilities == dwCommonCaps) ? S_OK : S_FALSE;
*pCapabilities = dwCommonCaps;
return hr;
}
HRESULT WINAPI SourceSeekingImpl_IsFormatSupported(IMediaSeeking * iface, const GUID * pFormat)
{
TRACE("(%s)\n", debugstr_guid(pFormat));
return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : S_FALSE);
}
HRESULT WINAPI SourceSeekingImpl_QueryPreferredFormat(IMediaSeeking * iface, GUID * pFormat)
{
TRACE("(%s)\n", debugstr_guid(pFormat));
*pFormat = TIME_FORMAT_MEDIA_TIME;
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetTimeFormat(IMediaSeeking * iface, GUID * pFormat)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%s)\n", debugstr_guid(pFormat));
EnterCriticalSection(This->crst);
*pFormat = This->timeformat;
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_IsUsingTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
{
SourceSeeking *This = (SourceSeeking *)iface;
HRESULT hr = S_OK;
TRACE("(%s)\n", debugstr_guid(pFormat));
EnterCriticalSection(This->crst);
if (!IsEqualIID(pFormat, &This->timeformat))
hr = S_FALSE;
LeaveCriticalSection(This->crst);
return hr;
}
HRESULT WINAPI SourceSeekingImpl_SetTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("%p %s\n", This, debugstr_guid(pFormat));
return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : E_INVALIDARG);
}
HRESULT WINAPI SourceSeekingImpl_GetDuration(IMediaSeeking * iface, LONGLONG * pDuration)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p)\n", pDuration);
EnterCriticalSection(This->crst);
*pDuration = This->llDuration;
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetStopPosition(IMediaSeeking * iface, LONGLONG * pStop)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p)\n", pStop);
EnterCriticalSection(This->crst);
*pStop = This->llStop;
LeaveCriticalSection(This->crst);
return S_OK;
}
/* FIXME: Make use of the info the filter should expose */
HRESULT WINAPI SourceSeekingImpl_GetCurrentPosition(IMediaSeeking * iface, LONGLONG * pCurrent)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p)\n", pCurrent);
EnterCriticalSection(This->crst);
*pCurrent = This->llCurrent;
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_ConvertTimeFormat(IMediaSeeking * iface, LONGLONG * pTarget, const GUID * pTargetFormat, LONGLONG Source, const GUID * pSourceFormat)
{
if (IsEqualIID(pTargetFormat, &TIME_FORMAT_MEDIA_TIME) && IsEqualIID(pSourceFormat, &TIME_FORMAT_MEDIA_TIME))
{
*pTarget = Source;
return S_OK;
}
/* FIXME: clear pTarget? */
return E_INVALIDARG;
}
static inline LONGLONG Adjust(LONGLONG value, const LONGLONG * pModifier, DWORD dwFlags)
{
switch (dwFlags & AM_SEEKING_PositioningBitsMask)
{
case AM_SEEKING_NoPositioning:
return value;
case AM_SEEKING_AbsolutePositioning:
return *pModifier;
case AM_SEEKING_RelativePositioning:
case AM_SEEKING_IncrementalPositioning:
return value + *pModifier;
default:
assert(FALSE);
return 0;
}
}
HRESULT WINAPI SourceSeekingImpl_SetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, DWORD dwCurrentFlags, LONGLONG * pStop, DWORD dwStopFlags)
{
SourceSeeking *This = (SourceSeeking *)iface;
BOOL bChangeCurrent = FALSE, bChangeStop = FALSE;
LONGLONG llNewCurrent, llNewStop;
TRACE("(%p, %x, %p, %x)\n", pCurrent, dwCurrentFlags, pStop, dwStopFlags);
EnterCriticalSection(This->crst);
llNewCurrent = Adjust(This->llCurrent, pCurrent, dwCurrentFlags);
llNewStop = Adjust(This->llStop, pStop, dwStopFlags);
if (pCurrent)
bChangeCurrent = TRUE;
if (llNewStop != This->llStop)
bChangeStop = TRUE;
TRACE("Old: %u, New: %u\n", (DWORD)(This->llCurrent/10000000), (DWORD)(llNewCurrent/10000000));
This->llCurrent = llNewCurrent;
This->llStop = llNewStop;
if (pCurrent && (dwCurrentFlags & AM_SEEKING_ReturnTime))
*pCurrent = llNewCurrent;
if (pStop && (dwStopFlags & AM_SEEKING_ReturnTime))
*pStop = llNewStop;
LeaveCriticalSection(This->crst);
if (bChangeCurrent)
This->fnChangeStart(iface);
if (bChangeStop)
This->fnChangeStop(iface);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, LONGLONG * pStop)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p, %p)\n", pCurrent, pStop);
EnterCriticalSection(This->crst);
IMediaSeeking_GetCurrentPosition(iface, pCurrent);
IMediaSeeking_GetStopPosition(iface, pStop);
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetAvailable(IMediaSeeking * iface, LONGLONG * pEarliest, LONGLONG * pLatest)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p, %p)\n", pEarliest, pLatest);
EnterCriticalSection(This->crst);
*pEarliest = 0;
*pLatest = This->llDuration;
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_SetRate(IMediaSeeking * iface, double dRate)
{
SourceSeeking *This = (SourceSeeking *)iface;
BOOL bChangeRate = (dRate != This->dRate);
HRESULT hr = S_OK;
TRACE("(%e)\n", dRate);
if (dRate > 100 || dRate < .001)
{
FIXME("Excessive rate %e, ignoring\n", dRate);
return VFW_E_UNSUPPORTED_AUDIO;
}
EnterCriticalSection(This->crst);
This->dRate = dRate;
if (bChangeRate)
hr = This->fnChangeRate(iface);
LeaveCriticalSection(This->crst);
return hr;
}
HRESULT WINAPI SourceSeekingImpl_GetRate(IMediaSeeking * iface, double * dRate)
{
SourceSeeking *This = (SourceSeeking *)iface;
TRACE("(%p)\n", dRate);
EnterCriticalSection(This->crst);
/* Forward? */
*dRate = This->dRate;
LeaveCriticalSection(This->crst);
return S_OK;
}
HRESULT WINAPI SourceSeekingImpl_GetPreroll(IMediaSeeking * iface, LONGLONG * pPreroll)
{
TRACE("(%p)\n", pPreroll);
*pPreroll = 0;
return S_OK;
}