2 * Quality Control Interfaces
4 * Copyright 2010 Maarten Lankhorst for Codeweavers
6 * rendering qos functions based on, the original can be found at
7 * gstreamer/libs/gst/base/gstbasesink.c which has copyright notice:
9 * Copyright (C) 2005-2007 Wim Taymans <wim.taymans@gmail.com>
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.
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.
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
29 #include "wine/strmbase.h"
32 #include "wine/debug.h"
36 WINE_DEFAULT_DEBUG_CHANNEL(strmbase_qc);
38 void QualityControlImpl_init(QualityControlImpl *This, IPin *input, IBaseFilter *self) {
41 This->tonotify = NULL;
45 HRESULT WINAPI QualityControlImpl_QueryInterface(IQualityControl *iface, REFIID riid, void **ppv) {
46 QualityControlImpl *This = (QualityControlImpl*)iface;
47 return IUnknown_QueryInterface(This->self, riid, ppv);
50 ULONG WINAPI QualityControlImpl_AddRef(IQualityControl *iface) {
51 QualityControlImpl *This = (QualityControlImpl*)iface;
52 return IUnknown_AddRef(This->self);
55 ULONG WINAPI QualityControlImpl_Release(IQualityControl *iface) {
56 QualityControlImpl *This = (QualityControlImpl*)iface;
57 return IUnknown_Release(This->self);
60 HRESULT WINAPI QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm) {
62 QualityControlImpl *This = (QualityControlImpl*)iface;
64 return IQualityControl_Notify(This->tonotify, This->self, qm);
67 IPin_ConnectedTo(This->input, &to);
69 IQualityControl *qc = NULL;
70 IUnknown_QueryInterface(to, &IID_IQualityControl, (void**)&qc);
72 hr = IQualityControl_Notify(qc, This->self, qm);
73 IQualityControl_Release(qc);
81 HRESULT WINAPI QualityControlImpl_SetSink(IQualityControl *iface, IQualityControl *tonotify) {
82 QualityControlImpl *This = (QualityControlImpl*)iface;
83 This->tonotify = tonotify;
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))
90 /* generic running average, this has a neutral window size */
91 #define UPDATE_RUNNING_AVG(avg,val) DO_RUNNING_AVG(avg,val,8)
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)
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 */
108 void QualityControlRender_SetClock(QualityControlImpl *This, IReferenceClock *clock) {
112 static BOOL QualityControlRender_IsLate(QualityControlImpl *This, REFERENCE_TIME jitter,
113 REFERENCE_TIME start, REFERENCE_TIME stop)
115 REFERENCE_TIME max_lateness = 200000;
117 /* we can add a valid stop time */
119 max_lateness += stop;
121 max_lateness += start;
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)
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");
134 This->last_in_time = start;
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)))
147 IReferenceClock_GetTime(This->clock, &now);
148 now -= This->clockstart;
150 jitter = now - start;
152 /* AdviseTime is bugged, so don't use it at all */
153 if (jitter < -200000) {
155 IReferenceClock_AdviseTime(This->clock, clockstart, start, ev, &cookie);
156 WaitForSingleObject(ev, INFINITE);
157 IReferenceClock_Unadvise(This->clock, cookie);
161 TRACE("Sleeping for %i ms\n", (int)-jitter/10000);
162 WaitForSingleObject(ev, -jitter/10000);
167 This->current_rstart = start;
168 This->current_rstop = stop > start ? stop : start;
169 This->current_jitter = jitter;
170 This->is_dropped = QualityControlRender_IsLate(This, jitter, start, stop);
171 TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000), (int)(stop/10000), (int)(jitter / 10000));
172 if (This->is_dropped) {
174 if (!This->qos_handled)
181 void QualityControlRender_DoQOS(QualityControlImpl *priv)
183 REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
189 start = priv->current_rstart;
190 stop = priv->current_rstop;
191 jitter = priv->current_jitter;
194 /* this is the time the buffer entered the sink */
198 entered = start + jitter;
201 /* this is the time the buffer entered the sink */
202 entered = start + jitter;
203 /* this is the time the buffer left the sink */
204 left = start + jitter;
207 /* calculate duration of the buffer */
209 duration = stop - start;
213 /* if we have the time when the last buffer left us, calculate
215 if (priv->last_left >= 0) {
216 if (entered > priv->last_left) {
217 pt = entered - priv->last_left;
225 #define XTIME(u) (int)(u/10000000), (int)((u / 10000)%1000)
226 TRACE("start: %u.%03u, entered %u.%03u, left %u.%03u, pt: %u.%03u, "
227 "duration %u.%03u, jitter %u.%03u\n", XTIME(start), XTIME(entered),
228 XTIME(left), XTIME(pt), XTIME(duration), XTIME(jitter));
230 TRACE("avg_duration: %u.%03u, avg_pt: %u.%03u, avg_rate: %g\n",
231 XTIME(priv->avg_duration), XTIME(priv->avg_pt), priv->avg_rate);
234 /* collect running averages. for first observations, we copy the
236 if (priv->avg_duration < 0)
237 priv->avg_duration = duration;
239 priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
241 if (priv->avg_pt < 0)
244 priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
246 if (priv->avg_duration != 0)
248 (double)priv->avg_pt /
249 (double)priv->avg_duration;
253 if (priv->last_left >= 0) {
254 if (priv->is_dropped || priv->avg_rate < 0.0) {
255 priv->avg_rate = rate;
258 priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
260 priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
264 if (priv->avg_rate >= 0.0) {
267 /* if we have a valid rate, start sending QoS messages */
268 if (priv->current_jitter < 0) {
269 /* make sure we never go below 0 when adding the jitter to the
271 if (priv->current_rstart < -priv->current_jitter)
272 priv->current_jitter = -priv->current_rstart;
275 priv->current_jitter += (priv->current_rstop - priv->current_rstart);
276 q.Type = (jitter > 0 ? Famine : Flood);
277 q.Proportion = (LONG)(1000. / priv->avg_rate);
278 if (q.Proportion < 500)
280 else if (q.Proportion > 2000)
282 q.Late = priv->current_jitter;
283 q.TimeStamp = priv->current_rstart;
284 TRACE("Late: %i from %i, rate: %g\n", (int)(q.Late/10000), (int)(q.TimeStamp/10000), 1./priv->avg_rate);
285 hr = IQualityControl_Notify((IQualityControl *)priv, priv->self, q);
286 priv->qos_handled = hr == S_OK;
289 /* record when this buffer will leave us */
290 priv->last_left = left;
294 void QualityControlRender_BeginRender(QualityControlImpl *This) {
298 IReferenceClock_GetTime(This->clock, &This->start);
301 void QualityControlRender_EndRender(QualityControlImpl *This) {
302 REFERENCE_TIME elapsed;
303 if (!This->clock || This->start < 0 || FAILED(IReferenceClock_GetTime(This->clock, &This->stop)))
306 elapsed = This->start - This->stop;
309 if (This->avg_render < 0)
310 This->avg_render = elapsed;
312 This->avg_render = UPDATE_RUNNING_AVG (This->avg_render, elapsed);