sdk/lib/3rdparty/strmbase/seeking.c

   1 /*
   2  * Filter Seeking and Control Interfaces
   3  *
   4  * Copyright 2003 Robert Shearman
   5  * Copyright 2010 Aric Stewart, CodeWeavers
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21 /* FIXME: critical sections */
  22
  23 #define COBJMACROS
  24
  25 #include "dshow.h"
  26 #include "wine/strmbase.h"
  27
  28 #include "uuids.h"
  29 #include "wine/debug.h"
  30
  31 #include <assert.h>
  32
  33 WINE_DEFAULT_DEBUG_CHANNEL(strmbase);
  34
  35 static inline SourceSeeking *impl_from_IMediaSeeking(IMediaSeeking *iface)
  36 {
  37     return CONTAINING_RECORD(iface, SourceSeeking, IMediaSeeking_iface);
  38 }
  39
  40 HRESULT SourceSeeking_Init(SourceSeeking *pSeeking, const IMediaSeekingVtbl *Vtbl, SourceSeeking_ChangeStop fnChangeStop, SourceSeeking_ChangeStart fnChangeStart, SourceSeeking_ChangeRate fnChangeRate, PCRITICAL_SECTION crit_sect)
  41 {
  42     assert(fnChangeStop && fnChangeStart && fnChangeRate);
  43
  44     pSeeking->IMediaSeeking_iface.lpVtbl = Vtbl;
  45     pSeeking->refCount = 1;
  46     pSeeking->fnChangeRate = fnChangeRate;
  47     pSeeking->fnChangeStop = fnChangeStop;
  48     pSeeking->fnChangeStart = fnChangeStart;
  49     pSeeking->dwCapabilities = AM_SEEKING_CanSeekForwards |
  50         AM_SEEKING_CanSeekBackwards |
  51         AM_SEEKING_CanSeekAbsolute |
  52         AM_SEEKING_CanGetStopPos |
  53         AM_SEEKING_CanGetDuration;
  54     pSeeking->llCurrent = 0;
  55     pSeeking->llStop = ((ULONGLONG)0x80000000) << 32;
  56     pSeeking->llDuration = pSeeking->llStop;
  57     pSeeking->dRate = 1.0;
  58     pSeeking->timeformat = TIME_FORMAT_MEDIA_TIME;
  59     pSeeking->crst = crit_sect;
  60     return S_OK;
  61 }
  62
  63 HRESULT WINAPI SourceSeekingImpl_GetCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
  64 {
  65     SourceSeeking *This = impl_from_IMediaSeeking(iface);
  66
  67     TRACE("(%p)\n", pCapabilities);
  68
  69     *pCapabilities = This->dwCapabilities;
  70
  71     return S_OK;
  72 }
  73
  74 HRESULT WINAPI SourceSeekingImpl_CheckCapabilities(IMediaSeeking * iface, DWORD * pCapabilities)
  75 {
  76     SourceSeeking *This = impl_from_IMediaSeeking(iface);
  77     HRESULT hr;
  78     DWORD dwCommonCaps;
  79
  80     TRACE("(%p)\n", pCapabilities);
  81
  82     if (!pCapabilities)
  83         return E_POINTER;
  84
  85     dwCommonCaps = *pCapabilities & This->dwCapabilities;
  86
  87     if (!dwCommonCaps)
  88         hr = E_FAIL;
  89     else
  90         hr = (*pCapabilities == dwCommonCaps) ?  S_OK : S_FALSE;
  91     *pCapabilities = dwCommonCaps;
  92     return hr;
  93 }
  94
  95 HRESULT WINAPI SourceSeekingImpl_IsFormatSupported(IMediaSeeking * iface, const GUID * pFormat)
  96 {
  97     TRACE("(%s)\n", debugstr_guid(pFormat));
  98
  99     return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : S_FALSE);
 100 }
 101
 102 HRESULT WINAPI SourceSeekingImpl_QueryPreferredFormat(IMediaSeeking * iface, GUID * pFormat)
 103 {
 104     TRACE("(%s)\n", debugstr_guid(pFormat));
 105
 106     *pFormat = TIME_FORMAT_MEDIA_TIME;
 107     return S_OK;
 108 }
 109
 110 HRESULT WINAPI SourceSeekingImpl_GetTimeFormat(IMediaSeeking * iface, GUID * pFormat)
 111 {
 112     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 113     TRACE("(%s)\n", debugstr_guid(pFormat));
 114
 115     EnterCriticalSection(This->crst);
 116     *pFormat = This->timeformat;
 117     LeaveCriticalSection(This->crst);
 118
 119     return S_OK;
 120 }
 121
 122 HRESULT WINAPI SourceSeekingImpl_IsUsingTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
 123 {
 124     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 125     HRESULT hr = S_OK;
 126
 127     TRACE("(%s)\n", debugstr_guid(pFormat));
 128
 129     EnterCriticalSection(This->crst);
 130     if (!IsEqualIID(pFormat, &This->timeformat))
 131         hr = S_FALSE;
 132     LeaveCriticalSection(This->crst);
 133
 134     return hr;
 135 }
 136
 137 HRESULT WINAPI SourceSeekingImpl_SetTimeFormat(IMediaSeeking * iface, const GUID * pFormat)
 138 {
 139     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 140     TRACE("%p %s\n", This, debugstr_guid(pFormat));
 141     return (IsEqualIID(pFormat, &TIME_FORMAT_MEDIA_TIME) ? S_OK : E_INVALIDARG);
 142 }
 143
 144
 145 HRESULT WINAPI SourceSeekingImpl_GetDuration(IMediaSeeking * iface, LONGLONG * pDuration)
 146 {
 147     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 148
 149     TRACE("(%p)\n", pDuration);
 150
 151     EnterCriticalSection(This->crst);
 152     *pDuration = This->llDuration;
 153     LeaveCriticalSection(This->crst);
 154
 155     return S_OK;
 156 }
 157
 158 HRESULT WINAPI SourceSeekingImpl_GetStopPosition(IMediaSeeking * iface, LONGLONG * pStop)
 159 {
 160     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 161
 162     TRACE("(%p)\n", pStop);
 163
 164     EnterCriticalSection(This->crst);
 165     *pStop = This->llStop;
 166     LeaveCriticalSection(This->crst);
 167
 168     return S_OK;
 169 }
 170
 171 /* FIXME: Make use of the info the filter should expose */
 172 HRESULT WINAPI SourceSeekingImpl_GetCurrentPosition(IMediaSeeking * iface, LONGLONG * pCurrent)
 173 {
 174     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 175
 176     TRACE("(%p)\n", pCurrent);
 177
 178     EnterCriticalSection(This->crst);
 179     *pCurrent = This->llCurrent;
 180     LeaveCriticalSection(This->crst);
 181
 182     return S_OK;
 183 }
 184
 185 HRESULT WINAPI SourceSeekingImpl_ConvertTimeFormat(IMediaSeeking * iface, LONGLONG * pTarget, const GUID * pTargetFormat, LONGLONG Source, const GUID * pSourceFormat)
 186 {
 187     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 188     if (!pTargetFormat)
 189         pTargetFormat = &This->timeformat;
 190     if (!pSourceFormat)
 191         pSourceFormat = &This->timeformat;
 192     if (IsEqualIID(pTargetFormat, &TIME_FORMAT_MEDIA_TIME) && IsEqualIID(pSourceFormat, &TIME_FORMAT_MEDIA_TIME))
 193     {
 194         *pTarget = Source;
 195         return S_OK;
 196     }
 197     /* FIXME: clear pTarget? */
 198     return E_INVALIDARG;
 199 }
 200
 201 static inline LONGLONG Adjust(LONGLONG value, const LONGLONG * pModifier, DWORD dwFlags)
 202 {
 203     switch (dwFlags & AM_SEEKING_PositioningBitsMask)
 204     {
 205     case AM_SEEKING_NoPositioning:
 206         return value;
 207     case AM_SEEKING_AbsolutePositioning:
 208         return *pModifier;
 209     case AM_SEEKING_RelativePositioning:
 210     case AM_SEEKING_IncrementalPositioning:
 211         return value + *pModifier;
 212     default:
 213         assert(FALSE);
 214         return 0;
 215     }
 216 }
 217
 218 HRESULT WINAPI SourceSeekingImpl_SetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, DWORD dwCurrentFlags, LONGLONG * pStop, DWORD dwStopFlags)
 219 {
 220     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 221     BOOL bChangeCurrent = FALSE, bChangeStop = FALSE;
 222     LONGLONG llNewCurrent, llNewStop;
 223
 224     TRACE("(%p, %x, %p, %x)\n", pCurrent, dwCurrentFlags, pStop, dwStopFlags);
 225     EnterCriticalSection(This->crst);
 226
 227     llNewCurrent = Adjust(This->llCurrent, pCurrent, dwCurrentFlags);
 228     llNewStop = Adjust(This->llStop, pStop, dwStopFlags);
 229
 230     if (pCurrent)
 231         bChangeCurrent = TRUE;
 232     if (llNewStop != This->llStop)
 233         bChangeStop = TRUE;
 234
 235     TRACE("Old: %u, New: %u\n", (DWORD)(This->llCurrent/10000000), (DWORD)(llNewCurrent/10000000));
 236
 237     This->llCurrent = llNewCurrent;
 238     This->llStop = llNewStop;
 239
 240     if (pCurrent && (dwCurrentFlags & AM_SEEKING_ReturnTime))
 241         *pCurrent = llNewCurrent;
 242     if (pStop && (dwStopFlags & AM_SEEKING_ReturnTime))
 243         *pStop = llNewStop;
 244     LeaveCriticalSection(This->crst);
 245
 246     if (bChangeCurrent)
 247         This->fnChangeStart(iface);
 248     if (bChangeStop)
 249         This->fnChangeStop(iface);
 250
 251     return S_OK;
 252 }
 253
 254 HRESULT WINAPI SourceSeekingImpl_GetPositions(IMediaSeeking * iface, LONGLONG * pCurrent, LONGLONG * pStop)
 255 {
 256     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 257
 258     TRACE("(%p, %p)\n", pCurrent, pStop);
 259
 260     EnterCriticalSection(This->crst);
 261     IMediaSeeking_GetCurrentPosition(iface, pCurrent);
 262     IMediaSeeking_GetStopPosition(iface, pStop);
 263     LeaveCriticalSection(This->crst);
 264
 265     return S_OK;
 266 }
 267
 268 HRESULT WINAPI SourceSeekingImpl_GetAvailable(IMediaSeeking * iface, LONGLONG * pEarliest, LONGLONG * pLatest)
 269 {
 270     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 271
 272     TRACE("(%p, %p)\n", pEarliest, pLatest);
 273
 274     EnterCriticalSection(This->crst);
 275     *pEarliest = 0;
 276     *pLatest = This->llDuration;
 277     LeaveCriticalSection(This->crst);
 278
 279     return S_OK;
 280 }
 281
 282 HRESULT WINAPI SourceSeekingImpl_SetRate(IMediaSeeking * iface, double dRate)
 283 {
 284     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 285     BOOL bChangeRate = (dRate != This->dRate);
 286     HRESULT hr = S_OK;
 287
 288     TRACE("(%e)\n", dRate);
 289
 290     if (dRate > 100 || dRate < .001)
 291     {
 292         FIXME("Excessive rate %e, ignoring\n", dRate);
 293         return VFW_E_UNSUPPORTED_AUDIO;
 294     }
 295
 296     EnterCriticalSection(This->crst);
 297     This->dRate = dRate;
 298     if (bChangeRate)
 299         hr = This->fnChangeRate(iface);
 300     LeaveCriticalSection(This->crst);
 301
 302     return hr;
 303 }
 304
 305 HRESULT WINAPI SourceSeekingImpl_GetRate(IMediaSeeking * iface, double * dRate)
 306 {
 307     SourceSeeking *This = impl_from_IMediaSeeking(iface);
 308
 309     TRACE("(%p)\n", dRate);
 310
 311     EnterCriticalSection(This->crst);
 312     /* Forward? */
 313     *dRate = This->dRate;
 314     LeaveCriticalSection(This->crst);
 315
 316     return S_OK;
 317 }
 318
 319 HRESULT WINAPI SourceSeekingImpl_GetPreroll(IMediaSeeking * iface, LONGLONG * pPreroll)
 320 {
 321     TRACE("(%p)\n", pPreroll);
 322
 323     *pPreroll = 0;
 324     return S_OK;
 325 }