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 void QualityControlImpl_Destroy(QualityControlImpl *This)
  53 {
  54     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 = 0;
 116     This->is_dropped = FALSE;
 117     This->qos_handled = TRUE; /* Lie that will be corrected on first adjustment */
 118 }
 119
 120
 121 void QualityControlRender_SetClock(QualityControlImpl *This, IReferenceClock *clock) {
 122     This->clock = clock;
 123 }
 124
 125 static BOOL QualityControlRender_IsLate(QualityControlImpl *This, REFERENCE_TIME jitter,
 126                                         REFERENCE_TIME start, REFERENCE_TIME stop)
 127 {
 128     REFERENCE_TIME max_lateness = 200000;
 129
 130     /* we can add a valid stop time */
 131     if (stop >= start)
 132         max_lateness += stop;
 133     else
 134         max_lateness += start;
 135
 136     /* if the jitter bigger than duration and lateness we are too late */
 137     if (start + jitter > max_lateness) {
 138         WARN("buffer is too late %i > %i\n", (int)((start + jitter)/10000),  (int)(max_lateness/10000));
 139         /* !!emergency!!, if we did not receive anything valid for more than a
 140          * second, render it anyway so the user sees something */
 141         if (This->last_in_time < 0 ||
 142             start - This->last_in_time < 10000000)
 143             return TRUE;
 144         FIXME("A lot of buffers are being dropped.\n");
 145         FIXME("There may be a timestamping problem, or this computer is too slow.\n");
 146     }
 147     This->last_in_time = start;
 148     return FALSE;
 149 }
 150
 151 HRESULT QualityControlRender_WaitFor(QualityControlImpl *This, IMediaSample *sample, HANDLE ev) {
 152     REFERENCE_TIME start = -1, stop = -1, jitter = 0;
 153     This->current_rstart = This->current_rstop = -1;
 154     This->current_jitter = 0;
 155     if (!This->clock || FAILED(IMediaSample_GetTime(sample, &start, &stop)))
 156         return S_OK;
 157
 158     if (start >= 0) {
 159         REFERENCE_TIME now;
 160         IReferenceClock_GetTime(This->clock, &now);
 161         now -= This->clockstart;
 162
 163         jitter = now - start;
 164         if (jitter <= -10000) {
 165             DWORD_PTR cookie;
 166             IReferenceClock_AdviseTime(This->clock, This->clockstart, start, (HEVENT)ev, &cookie);
 167             WaitForSingleObject(ev, INFINITE);
 168             IReferenceClock_Unadvise(This->clock, cookie);
 169         }
 170     }
 171     else
 172         start = stop = -1;
 173     This->current_rstart = start;
 174     This->current_rstop = stop > start ? stop : start;
 175     This->current_jitter = jitter;
 176     This->is_dropped = QualityControlRender_IsLate(This, jitter, start, stop);
 177     TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000), (int)(stop/10000), (int)(jitter / 10000));
 178     if (This->is_dropped) {
 179         This->dropped++;
 180         if (!This->qos_handled)
 181             return S_FALSE;
 182     } else
 183         This->rendered++;
 184     return S_OK;
 185 }
 186
 187 void QualityControlRender_DoQOS(QualityControlImpl *priv)
 188 {
 189     REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
 190     double rate;
 191
 192     if (!priv->clock || priv->current_rstart < 0)
 193         return;
 194
 195     start = priv->current_rstart;
 196     stop = priv->current_rstop;
 197     jitter = priv->current_jitter;
 198
 199     if (jitter < 0) {
 200         /* this is the time the buffer entered the sink */
 201         if (start < -jitter)
 202             entered = 0;
 203         else
 204             entered = start + jitter;
 205         left = start;
 206     } else {
 207         /* this is the time the buffer entered the sink */
 208         entered = start + jitter;
 209         /* this is the time the buffer left the sink */
 210         left = start + jitter;
 211     }
 212
 213     /* calculate duration of the buffer */
 214     if (stop >= start)
 215         duration = stop - start;
 216     else
 217         duration = 0;
 218
 219     /* if we have the time when the last buffer left us, calculate
 220      * processing time */
 221     if (priv->last_left >= 0) {
 222         if (entered > priv->last_left) {
 223             pt = entered - priv->last_left;
 224         } else {
 225             pt = 0;
 226         }
 227     } else {
 228         pt = priv->avg_pt;
 229     }
 230
 231 #define XTIME(u) (int)(u/10000000), (int)((u / 10000)%1000)
 232     TRACE("start: %u.%03u, entered %u.%03u, left %u.%03u, pt: %u.%03u, "
 233           "duration %u.%03u, jitter %u.%03u\n", XTIME(start), XTIME(entered),
 234           XTIME(left), XTIME(pt), XTIME(duration), XTIME(jitter));
 235
 236     TRACE("avg_duration: %u.%03u, avg_pt: %u.%03u, avg_rate: %g\n",
 237       XTIME(priv->avg_duration), XTIME(priv->avg_pt), priv->avg_rate);
 238 #undef XTIME
 239
 240     /* collect running averages. for first observations, we copy the
 241     * values */
 242     if (priv->avg_duration < 0)
 243         priv->avg_duration = duration;
 244     else
 245         priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
 246
 247     if (priv->avg_pt < 0)
 248         priv->avg_pt = pt;
 249     else
 250         priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
 251
 252     if (priv->avg_duration != 0)
 253         rate =
 254             (double)priv->avg_pt /
 255             (double)priv->avg_duration;
 256     else
 257         rate = 0.0;
 258
 259     if (priv->last_left >= 0) {
 260         if (priv->is_dropped || priv->avg_rate < 0.0) {
 261             priv->avg_rate = rate;
 262         } else {
 263             if (rate > 1.0)
 264                 priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
 265             else
 266                 priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
 267         }
 268     }
 269
 270     if (priv->avg_rate >= 0.0) {
 271         HRESULT hr;
 272         Quality q;
 273         /* if we have a valid rate, start sending QoS messages */
 274         if (priv->current_jitter < 0) {
 275             /* make sure we never go below 0 when adding the jitter to the
 276              * timestamp. */
 277             if (priv->current_rstart < -priv->current_jitter)
 278                 priv->current_jitter = -priv->current_rstart;
 279         }
 280         else
 281             priv->current_jitter += (priv->current_rstop - priv->current_rstart);
 282         q.Type = (jitter > 0 ? Famine : Flood);
 283         q.Proportion = (LONG)(1000. / priv->avg_rate);
 284         if (q.Proportion < 200)
 285             q.Proportion = 200;
 286         else if (q.Proportion > 5000)
 287             q.Proportion = 5000;
 288         q.Late = priv->current_jitter;
 289         q.TimeStamp = priv->current_rstart;
 290         TRACE("Late: %i from %i, rate: %g\n", (int)(q.Late/10000), (int)(q.TimeStamp/10000), 1./priv->avg_rate);
 291         hr = IQualityControl_Notify((IQualityControl *)priv, priv->self, q);
 292         priv->qos_handled = hr == S_OK;
 293     }
 294
 295     /* record when this buffer will leave us */
 296     priv->last_left = left;
 297 }
 298
 299
 300 void QualityControlRender_BeginRender(QualityControlImpl *This) {
 301     This->start = -1;
 302     if (!This->clock)
 303         return;
 304     IReferenceClock_GetTime(This->clock, &This->start);
 305 }
 306
 307 void QualityControlRender_EndRender(QualityControlImpl *This) {
 308     REFERENCE_TIME elapsed;
 309     if (!This->clock || This->start < 0 || FAILED(IReferenceClock_GetTime(This->clock, &This->stop)))
 310         return;
 311
 312     elapsed = This->start - This->stop;
 313     if (elapsed < 0)
 314         return;
 315     if (This->avg_render < 0)
 316         This->avg_render = elapsed;
 317     else
 318         This->avg_render = UPDATE_RUNNING_AVG (This->avg_render, elapsed);
 319 }