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
  31 #include "uuids.h"
  32 #include "wine/debug.h"
  33
  34 #include <assert.h>
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(strmbase_qc);
  37
  38 void QualityControlImpl_init(QualityControlImpl *This, IPin *input, IBaseFilter *self) {
  39     This->input = input;
  40     This->self = self;
  41     This->tonotify = NULL;
  42     This->clock = NULL;
  43 }
  44
  45 HRESULT WINAPI QualityControlImpl_QueryInterface(IQualityControl *iface, REFIID riid, void **ppv) {
  46     QualityControlImpl *This = (QualityControlImpl*)iface;
  47     return IUnknown_QueryInterface(This->self, riid, ppv);
  48 }
  49
  50 ULONG WINAPI QualityControlImpl_AddRef(IQualityControl *iface) {
  51     QualityControlImpl *This = (QualityControlImpl*)iface;
  52     return IUnknown_AddRef(This->self);
  53 }
  54
  55 ULONG WINAPI QualityControlImpl_Release(IQualityControl *iface) {
  56     QualityControlImpl *This = (QualityControlImpl*)iface;
  57     return IUnknown_Release(This->self);
  58 }
  59
  60 HRESULT WINAPI QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm) {
  61     HRESULT hr = S_FALSE;
  62     QualityControlImpl *This = (QualityControlImpl*)iface;
  63     if (This->tonotify)
  64         return IQualityControl_Notify(This->tonotify, This->self, qm);
  65     if (This->input) {
  66         IPin *to = NULL;
  67         IPin_ConnectedTo(This->input, &to);
  68         if (to) {
  69             IQualityControl *qc = NULL;
  70             IUnknown_QueryInterface(to, &IID_IQualityControl, (void**)&qc);
  71             if (qc) {
  72                 hr = IQualityControl_Notify(qc, This->self, qm);
  73                 IQualityControl_Release(qc);
  74             }
  75             IPin_Release(to);
  76         }
  77     }
  78     return hr;
  79 }
  80
  81 HRESULT WINAPI QualityControlImpl_SetSink(IQualityControl *iface, IQualityControl *tonotify) {
  82     QualityControlImpl *This = (QualityControlImpl*)iface;
  83     This->tonotify = tonotify;
  84     return S_OK;
  85 }
  86
  87 /* Macros copied from gstreamer, weighted average between old average and new ones */
  88 #define DO_RUNNING_AVG(avg,val,size) (((val) + ((size)-1) * (avg)) / (size))
  89
  90 /* generic running average, this has a neutral window size */
  91 #define UPDATE_RUNNING_AVG(avg,val)   DO_RUNNING_AVG(avg,val,8)
  92
  93 /* the windows for these running averages are experimentally obtained.
  94  * possitive values get averaged more while negative values use a small
  95  * window so we can react faster to badness. */
  96 #define UPDATE_RUNNING_AVG_P(avg,val) DO_RUNNING_AVG(avg,val,16)
  97 #define UPDATE_RUNNING_AVG_N(avg,val) DO_RUNNING_AVG(avg,val,4)
  98
  99 void QualityControlRender_Start(QualityControlImpl *This, REFERENCE_TIME tStart) {
 100     This->avg_render = This->last_in_time = This->last_left = This->avg_duration = This->avg_pt = -1;
 101     This->clockstart = tStart;
 102     This->avg_rate = -1.0;
 103     This->rendered = This->dropped = This->is_dropped = 0;
 104     This->qos_handled = 1; /* Lie that will be corrected on first adjustment */
 105 }
 106
 107
 108 void QualityControlRender_SetClock(QualityControlImpl *This, IReferenceClock *clock) {
 109     This->clock = clock;
 110 }
 111
 112 static BOOL QualityControlRender_IsLate(QualityControlImpl *This, REFERENCE_TIME jitter,
 113                                         REFERENCE_TIME start, REFERENCE_TIME stop)
 114 {
 115     REFERENCE_TIME max_lateness = 200000;
 116
 117     /* we can add a valid stop time */
 118     if (stop >= start)
 119         max_lateness += stop;
 120     else
 121         max_lateness += start;
 122
 123     /* if the jitter bigger than duration and lateness we are too late */
 124     if (start + jitter > max_lateness) {
 125         WARN("buffer is too late %i > %i\n", (int)((start + jitter)/10000),  (int)(max_lateness/10000));
 126         /* !!emergency!!, if we did not receive anything valid for more than a
 127          * second, render it anyway so the user sees something */
 128         if (This->last_in_time < 0 ||
 129             start - This->last_in_time < 10000000)
 130             return TRUE;
 131         FIXME("A lot of buffers are being dropped.\n");
 132         FIXME("There may be a timestamping problem, or this computer is too slow.\n");
 133     }
 134     This->last_in_time = start;
 135     return FALSE;
 136 }
 137
 138 HRESULT QualityControlRender_WaitFor(QualityControlImpl *This, IMediaSample *sample, HANDLE ev) {
 139     REFERENCE_TIME start = -1, stop = -1, jitter = 0;
 140     This->current_rstart = This->current_rstop = -1;
 141     This->current_jitter = 0;
 142     if (!This->clock || FAILED(IMediaSample_GetTime(sample, &start, &stop)))
 143         return S_OK;
 144
 145     if (start >= 0) {
 146         REFERENCE_TIME now;
 147         IReferenceClock_GetTime(This->clock, &now);
 148         now -= This->clockstart;
 149
 150         jitter = now - start;
 151         if (jitter <= -10000) {
 152             DWORD_PTR cookie;
 153             IReferenceClock_AdviseTime(This->clock, This->clockstart, start, (HEVENT)ev, &cookie);
 154             WaitForSingleObject(ev, INFINITE);
 155             IReferenceClock_Unadvise(This->clock, cookie);
 156         }
 157     }
 158     else
 159         start = stop = -1;
 160     This->current_rstart = start;
 161     This->current_rstop = stop > start ? stop : start;
 162     This->current_jitter = jitter;
 163     This->is_dropped = QualityControlRender_IsLate(This, jitter, start, stop);
 164     TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000), (int)(stop/10000), (int)(jitter / 10000));
 165     if (This->is_dropped) {
 166         This->dropped++;
 167         if (!This->qos_handled)
 168             return S_FALSE;
 169     } else
 170         This->rendered++;
 171     return S_OK;
 172 }
 173
 174 void QualityControlRender_DoQOS(QualityControlImpl *priv)
 175 {
 176     REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
 177     double rate;
 178
 179     if (!priv->clock || priv->current_rstart < 0)
 180         return;
 181
 182     start = priv->current_rstart;
 183     stop = priv->current_rstop;
 184     jitter = priv->current_jitter;
 185
 186     if (jitter < 0) {
 187         /* this is the time the buffer entered the sink */
 188         if (start < -jitter)
 189             entered = 0;
 190         else
 191             entered = start + jitter;
 192         left = start;
 193     } else {
 194         /* this is the time the buffer entered the sink */
 195         entered = start + jitter;
 196         /* this is the time the buffer left the sink */
 197         left = start + jitter;
 198     }
 199
 200     /* calculate duration of the buffer */
 201     if (stop >= start)
 202         duration = stop - start;
 203     else
 204         duration = 0;
 205
 206     /* if we have the time when the last buffer left us, calculate
 207      * processing time */
 208     if (priv->last_left >= 0) {
 209         if (entered > priv->last_left) {
 210             pt = entered - priv->last_left;
 211         } else {
 212             pt = 0;
 213         }
 214     } else {
 215         pt = priv->avg_pt;
 216     }
 217
 218 #define XTIME(u) (int)(u/10000000), (int)((u / 10000)%1000)
 219     TRACE("start: %u.%03u, entered %u.%03u, left %u.%03u, pt: %u.%03u, "
 220           "duration %u.%03u, jitter %u.%03u\n", XTIME(start), XTIME(entered),
 221           XTIME(left), XTIME(pt), XTIME(duration), XTIME(jitter));
 222
 223     TRACE("avg_duration: %u.%03u, avg_pt: %u.%03u, avg_rate: %g\n",
 224       XTIME(priv->avg_duration), XTIME(priv->avg_pt), priv->avg_rate);
 225 #undef XTIME
 226
 227     /* collect running averages. for first observations, we copy the
 228     * values */
 229     if (priv->avg_duration < 0)
 230         priv->avg_duration = duration;
 231     else
 232         priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
 233
 234     if (priv->avg_pt < 0)
 235         priv->avg_pt = pt;
 236     else
 237         priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
 238
 239     if (priv->avg_duration != 0)
 240         rate =
 241             (double)priv->avg_pt /
 242             (double)priv->avg_duration;
 243     else
 244         rate = 0.0;
 245
 246     if (priv->last_left >= 0) {
 247         if (priv->is_dropped || priv->avg_rate < 0.0) {
 248             priv->avg_rate = rate;
 249         } else {
 250             if (rate > 1.0)
 251                 priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
 252             else
 253                 priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
 254         }
 255     }
 256
 257     if (priv->avg_rate >= 0.0) {
 258         HRESULT hr;
 259         Quality q;
 260         /* if we have a valid rate, start sending QoS messages */
 261         if (priv->current_jitter < 0) {
 262             /* make sure we never go below 0 when adding the jitter to the
 263              * timestamp. */
 264             if (priv->current_rstart < -priv->current_jitter)
 265                 priv->current_jitter = -priv->current_rstart;
 266         }
 267         else
 268             priv->current_jitter += (priv->current_rstop - priv->current_rstart);
 269         q.Type = (jitter > 0 ? Famine : Flood);
 270         q.Proportion = (LONG)(1000. / priv->avg_rate);
 271         if (q.Proportion < 200)
 272             q.Proportion = 200;
 273         else if (q.Proportion > 5000)
 274             q.Proportion = 5000;
 275         q.Late = priv->current_jitter;
 276         q.TimeStamp = priv->current_rstart;
 277         TRACE("Late: %i from %i, rate: %g\n", (int)(q.Late/10000), (int)(q.TimeStamp/10000), 1./priv->avg_rate);
 278         hr = IQualityControl_Notify((IQualityControl *)priv, priv->self, q);
 279         priv->qos_handled = hr == S_OK;
 280     }
 281
 282     /* record when this buffer will leave us */
 283     priv->last_left = left;
 284 }
 285
 286
 287 void QualityControlRender_BeginRender(QualityControlImpl *This) {
 288     This->start = -1;
 289     if (!This->clock)
 290         return;
 291     IReferenceClock_GetTime(This->clock, &This->start);
 292 }
 293
 294 void QualityControlRender_EndRender(QualityControlImpl *This) {
 295     REFERENCE_TIME elapsed;
 296     if (!This->clock || This->start < 0 || FAILED(IReferenceClock_GetTime(This->clock, &This->stop)))
 297         return;
 298
 299     elapsed = This->start - This->stop;
 300     if (elapsed < 0)
 301         return;
 302     if (This->avg_render < 0)
 303         This->avg_render = elapsed;
 304     else
 305         This->avg_render = UPDATE_RUNNING_AVG (This->avg_render, elapsed);
 306 }