dlls/strmbase/qualitycontrol.c

   1 /*
   2  * Quality Control Interfaces
   3  *
   4  * Copyright 2010 Maarten Lankhorst for CodeWeavers
   5  *
   6  * rendering qos functions based on, the original can be found at
   7  * gstreamer/libs/gst/base/gstbasesink.c which has copyright notice:
   8  *
   9  * Copyright (C) 2005-2007 Wim Taymans <wim.taymans@gmail.com>
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * This library is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with this library; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  24  */
  25
  26 #define COBJMACROS
  27
  28 #include "dshow.h"
  29 #include "wine/strmbase.h"
  30 #include "strmbase_private.h"
  31
  32 #include "uuids.h"
  33 #include "wine/debug.h"
  34
  35 #include <assert.h>
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(strmbase_qc);
  38
  39 HRESULT QualityControlImpl_Create(IPin *input, IBaseFilter *self, QualityControlImpl **ppv) {
  40     QualityControlImpl *This;
  41     *ppv = HeapAlloc(GetProcessHeap(),0,sizeof(QualityControlImpl));
  42     if (!*ppv)
  43         return E_OUTOFMEMORY;
  44     This = *ppv;
  45     This->input = input;
  46     This->self = self;
  47     This->tonotify = NULL;
  48     This->clock = NULL;
  49     return S_OK;
  50 }
  51
  52 HRESULT QualityControlImpl_Destroy(QualityControlImpl *This)
  53 {
  54     return HeapFree(GetProcessHeap(),0,This);
  55 }
  56
  57 HRESULT WINAPI QualityControlImpl_QueryInterface(IQualityControl *iface, REFIID riid, void **ppv) {
  58     QualityControlImpl *This = (QualityControlImpl*)iface;
  59     return IBaseFilter_QueryInterface(This->self, riid, ppv);
  60 }
  61
  62 ULONG WINAPI QualityControlImpl_AddRef(IQualityControl *iface) {
  63     QualityControlImpl *This = (QualityControlImpl*)iface;
  64     return IBaseFilter_AddRef(This->self);
  65 }
  66
  67 ULONG WINAPI QualityControlImpl_Release(IQualityControl *iface) {
  68     QualityControlImpl *This = (QualityControlImpl*)iface;
  69     return IBaseFilter_Release(This->self);
  70 }
  71
  72 HRESULT WINAPI QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm) {
  73     HRESULT hr = S_FALSE;
  74     QualityControlImpl *This = (QualityControlImpl*)iface;
  75     if (This->tonotify)
  76         return IQualityControl_Notify(This->tonotify, This->self, qm);
  77     if (This->input) {
  78         IPin *to = NULL;
  79         IPin_ConnectedTo(This->input, &to);
  80         if (to) {
  81             IQualityControl *qc = NULL;
  82             IPin_QueryInterface(to, &IID_IQualityControl, (void**)&qc);
  83             if (qc) {
  84                 hr = IQualityControl_Notify(qc, This->self, qm);
  85                 IQualityControl_Release(qc);
  86             }
  87             IPin_Release(to);
  88         }
  89     }
  90     return hr;
  91 }
  92
  93 HRESULT WINAPI QualityControlImpl_SetSink(IQualityControl *iface, IQualityControl *tonotify) {
  94     QualityControlImpl *This = (QualityControlImpl*)iface;
  95     This->tonotify = tonotify;
  96     return S_OK;
  97 }
  98
  99 /* Macros copied from gstreamer, weighted average between old average and new ones */
 100 #define DO_RUNNING_AVG(avg,val,size) (((val) + ((size)-1) * (avg)) / (size))
 101
 102 /* generic running average, this has a neutral window size */
 103 #define UPDATE_RUNNING_AVG(avg,val)   DO_RUNNING_AVG(avg,val,8)
 104
 105 /* the windows for these running averages are experimentally obtained.
 106  * possitive values get averaged more while negative values use a small
 107  * window so we can react faster to badness. */
 108 #define UPDATE_RUNNING_AVG_P(avg,val) DO_RUNNING_AVG(avg,val,16)
 109 #define UPDATE_RUNNING_AVG_N(avg,val) DO_RUNNING_AVG(avg,val,4)
 110
 111 void QualityControlRender_Start(QualityControlImpl *This, REFERENCE_TIME tStart) {
 112     This->avg_render = This->last_in_time = This->last_left = This->avg_duration = This->avg_pt = -1;
 113     This->clockstart = tStart;
 114     This->avg_rate = -1.0;
 115     This->rendered = This->dropped = This->is_dropped = 0;
 116     This->qos_handled = 1; /* Lie that will be corrected on first adjustment */
 117 }
 118
 119
 120 void QualityControlRender_SetClock(QualityControlImpl *This, IReferenceClock *clock) {
 121     This->clock = clock;
 122 }
 123
 124 static BOOL QualityControlRender_IsLate(QualityControlImpl *This, REFERENCE_TIME jitter,
 125                                         REFERENCE_TIME start, REFERENCE_TIME stop)
 126 {
 127     REFERENCE_TIME max_lateness = 200000;
 128
 129     /* we can add a valid stop time */
 130     if (stop >= start)
 131         max_lateness += stop;
 132     else
 133         max_lateness += start;
 134
 135     /* if the jitter bigger than duration and lateness we are too late */
 136     if (start + jitter > max_lateness) {
 137         WARN("buffer is too late %i > %i\n", (int)((start + jitter)/10000),  (int)(max_lateness/10000));
 138         /* !!emergency!!, if we did not receive anything valid for more than a
 139          * second, render it anyway so the user sees something */
 140         if (This->last_in_time < 0 ||
 141             start - This->last_in_time < 10000000)
 142             return TRUE;
 143         FIXME("A lot of buffers are being dropped.\n");
 144         FIXME("There may be a timestamping problem, or this computer is too slow.\n");
 145     }
 146     This->last_in_time = start;
 147     return FALSE;
 148 }
 149
 150 HRESULT QualityControlRender_WaitFor(QualityControlImpl *This, IMediaSample *sample, HANDLE ev) {
 151     REFERENCE_TIME start = -1, stop = -1, jitter = 0;
 152     This->current_rstart = This->current_rstop = -1;
 153     This->current_jitter = 0;
 154     if (!This->clock || FAILED(IMediaSample_GetTime(sample, &start, &stop)))
 155         return S_OK;
 156
 157     if (start >= 0) {
 158         REFERENCE_TIME now;
 159         IReferenceClock_GetTime(This->clock, &now);
 160         now -= This->clockstart;
 161
 162         jitter = now - start;
 163         if (jitter <= -10000) {
 164             DWORD_PTR cookie;
 165             IReferenceClock_AdviseTime(This->clock, This->clockstart, start, (HEVENT)ev, &cookie);
 166             WaitForSingleObject(ev, INFINITE);
 167             IReferenceClock_Unadvise(This->clock, cookie);
 168         }
 169     }
 170     else
 171         start = stop = -1;
 172     This->current_rstart = start;
 173     This->current_rstop = stop > start ? stop : start;
 174     This->current_jitter = jitter;
 175     This->is_dropped = QualityControlRender_IsLate(This, jitter, start, stop);
 176     TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000), (int)(stop/10000), (int)(jitter / 10000));
 177     if (This->is_dropped) {
 178         This->dropped++;
 179         if (!This->qos_handled)
 180             return S_FALSE;
 181     } else
 182         This->rendered++;
 183     return S_OK;
 184 }
 185
 186 void QualityControlRender_DoQOS(QualityControlImpl *priv)
 187 {
 188     REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
 189     double rate;
 190
 191     if (!priv->clock || priv->current_rstart < 0)
 192         return;
 193
 194     start = priv->current_rstart;
 195     stop = priv->current_rstop;
 196     jitter = priv->current_jitter;
 197
 198     if (jitter < 0) {
 199         /* this is the time the buffer entered the sink */
 200         if (start < -jitter)
 201             entered = 0;
 202         else
 203             entered = start + jitter;
 204         left = start;
 205     } else {
 206         /* this is the time the buffer entered the sink */
 207         entered = start + jitter;
 208         /* this is the time the buffer left the sink */
 209         left = start + jitter;
 210     }
 211
 212     /* calculate duration of the buffer */
 213     if (stop >= start)
 214         duration = stop - start;
 215     else
 216         duration = 0;
 217
 218     /* if we have the time when the last buffer left us, calculate
 219      * processing time */
 220     if (priv->last_left >= 0) {
 221         if (entered > priv->last_left) {
 222             pt = entered - priv->last_left;
 223         } else {
 224             pt = 0;
 225         }
 226     } else {
 227         pt = priv->avg_pt;
 228     }
 229
 230 #define XTIME(u) (int)(u/10000000), (int)((u / 10000)%1000)
 231     TRACE("start: %u.%03u, entered %u.%03u, left %u.%03u, pt: %u.%03u, "
 232           "duration %u.%03u, jitter %u.%03u\n", XTIME(start), XTIME(entered),
 233           XTIME(left), XTIME(pt), XTIME(duration), XTIME(jitter));
 234
 235     TRACE("avg_duration: %u.%03u, avg_pt: %u.%03u, avg_rate: %g\n",
 236       XTIME(priv->avg_duration), XTIME(priv->avg_pt), priv->avg_rate);
 237 #undef XTIME
 238
 239     /* collect running averages. for first observations, we copy the
 240     * values */
 241     if (priv->avg_duration < 0)
 242         priv->avg_duration = duration;
 243     else
 244         priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
 245
 246     if (priv->avg_pt < 0)
 247         priv->avg_pt = pt;
 248     else
 249         priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
 250
 251     if (priv->avg_duration != 0)
 252         rate =
 253             (double)priv->avg_pt /
 254             (double)priv->avg_duration;
 255     else
 256         rate = 0.0;
 257
 258     if (priv->last_left >= 0) {
 259         if (priv->is_dropped || priv->avg_rate < 0.0) {
 260             priv->avg_rate = rate;
 261         } else {
 262             if (rate > 1.0)
 263                 priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
 264             else
 265                 priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
 266         }
 267     }
 268
 269     if (priv->avg_rate >= 0.0) {
 270         HRESULT hr;
 271         Quality q;
 272         /* if we have a valid rate, start sending QoS messages */
 273         if (priv->current_jitter < 0) {
 274             /* make sure we never go below 0 when adding the jitter to the
 275              * timestamp. */
 276             if (priv->current_rstart < -priv->current_jitter)
 277                 priv->current_jitter = -priv->current_rstart;
 278         }
 279         else
 280             priv->current_jitter += (priv->current_rstop - priv->current_rstart);
 281         q.Type = (jitter > 0 ? Famine : Flood);
 282         q.Proportion = (LONG)(1000. / priv->avg_rate);
 283         if (q.Proportion < 200)
 284             q.Proportion = 200;
 285         else if (q.Proportion > 5000)
 286             q.Proportion = 5000;
 287         q.Late = priv->current_jitter;
 288         q.TimeStamp = priv->current_rstart;
 289         TRACE("Late: %i from %i, rate: %g\n", (int)(q.Late/10000), (int)(q.TimeStamp/10000), 1./priv->avg_rate);
 290         hr = IQualityControl_Notify((IQualityControl *)priv, priv->self, q);
 291         priv->qos_handled = hr == S_OK;
 292     }
 293
 294     /* record when this buffer will leave us */
 295     priv->last_left = left;
 296 }
 297
 298
 299 void QualityControlRender_BeginRender(QualityControlImpl *This) {
 300     This->start = -1;
 301     if (!This->clock)
 302         return;
 303     IReferenceClock_GetTime(This->clock, &This->start);
 304 }
 305
 306 void QualityControlRender_EndRender(QualityControlImpl *This) {
 307     REFERENCE_TIME elapsed;
 308     if (!This->clock || This->start < 0 || FAILED(IReferenceClock_GetTime(This->clock, &This->stop)))
 309         return;
 310
 311     elapsed = This->start - This->stop;
 312     if (elapsed < 0)
 313         return;
 314     if (This->avg_render < 0)
 315         This->avg_render = elapsed;
 316     else
 317         This->avg_render = UPDATE_RUNNING_AVG (This->avg_render, elapsed);
 318 }