Sweden-Number/dlls/strmbase/qualitycontrol.c

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/*
* Quality Control Interfaces
*
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* Copyright 2010 Maarten Lankhorst for CodeWeavers
*
* rendering qos functions based on, the original can be found at
* gstreamer/libs/gst/base/gstbasesink.c which has copyright notice:
*
* Copyright (C) 2005-2007 Wim Taymans <wim.taymans@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "strmbase_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(strmbase_qc);
#define XTIME_FMT "%u.%03u"
#define XTIME(u) (int)(u/10000000), (int)((u / 10000)%1000)
HRESULT QualityControlImpl_Create(IPin *input, IBaseFilter *self, QualityControlImpl **ppv)
{
QualityControlImpl *This;
TRACE("%p, %p, %p\n", input, self, ppv);
*ppv = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(QualityControlImpl));
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if (!*ppv)
return E_OUTOFMEMORY;
This = *ppv;
This->input = input;
This->self = self;
This->tonotify = NULL;
This->clock = NULL;
This->current_rstart = This->current_rstop = -1;
TRACE("-> %p\n", This);
return S_OK;
}
void QualityControlImpl_Destroy(QualityControlImpl *This)
{
HeapFree(GetProcessHeap(),0,This);
}
static inline QualityControlImpl *impl_from_IQualityControl(IQualityControl *iface)
{
return CONTAINING_RECORD(iface, QualityControlImpl, IQualityControl_iface);
}
HRESULT WINAPI QualityControlImpl_QueryInterface(IQualityControl *iface, REFIID riid, void **ppv)
{
QualityControlImpl *This = impl_from_IQualityControl(iface);
return IBaseFilter_QueryInterface(This->self, riid, ppv);
}
ULONG WINAPI QualityControlImpl_AddRef(IQualityControl *iface)
{
QualityControlImpl *This = impl_from_IQualityControl(iface);
return IBaseFilter_AddRef(This->self);
}
ULONG WINAPI QualityControlImpl_Release(IQualityControl *iface)
{
QualityControlImpl *This = impl_from_IQualityControl(iface);
return IBaseFilter_Release(This->self);
}
HRESULT WINAPI QualityControlImpl_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm)
{
QualityControlImpl *This = impl_from_IQualityControl(iface);
HRESULT hr = S_FALSE;
TRACE("%p %p { 0x%x %u " XTIME_FMT " " XTIME_FMT " }\n",
This, sender, qm.Type, qm.Proportion,
XTIME(qm.Late), XTIME(qm.TimeStamp));
if (This->tonotify)
return IQualityControl_Notify(This->tonotify, This->self, qm);
if (This->input) {
IPin *to = NULL;
IPin_ConnectedTo(This->input, &to);
if (to) {
IQualityControl *qc = NULL;
IPin_QueryInterface(to, &IID_IQualityControl, (void**)&qc);
if (qc) {
hr = IQualityControl_Notify(qc, This->self, qm);
IQualityControl_Release(qc);
}
IPin_Release(to);
}
}
return hr;
}
HRESULT WINAPI QualityControlImpl_SetSink(IQualityControl *iface, IQualityControl *tonotify)
{
QualityControlImpl *This = impl_from_IQualityControl(iface);
TRACE("%p %p\n", This, tonotify);
This->tonotify = tonotify;
return S_OK;
}
/* Macros copied from gstreamer, weighted average between old average and new ones */
#define DO_RUNNING_AVG(avg,val,size) (((val) + ((size)-1) * (avg)) / (size))
/* generic running average, this has a neutral window size */
#define UPDATE_RUNNING_AVG(avg,val) DO_RUNNING_AVG(avg,val,8)
/* the windows for these running averages are experimentally obtained.
* positive values get averaged more while negative values use a small
* window so we can react faster to badness. */
#define UPDATE_RUNNING_AVG_P(avg,val) DO_RUNNING_AVG(avg,val,16)
#define UPDATE_RUNNING_AVG_N(avg,val) DO_RUNNING_AVG(avg,val,4)
void QualityControlRender_Start(QualityControlImpl *This, REFERENCE_TIME tStart)
{
TRACE("%p " XTIME_FMT "\n", This, XTIME(tStart));
This->avg_render = This->last_in_time = This->last_left = This->avg_duration = This->avg_pt = -1;
This->clockstart = tStart;
This->avg_rate = -1.0;
This->rendered = This->dropped = 0;
This->is_dropped = FALSE;
This->qos_handled = TRUE; /* Lie that will be corrected on first adjustment */
}
void QualityControlRender_SetClock(QualityControlImpl *This, IReferenceClock *clock)
{
TRACE("%p %p\n", This, clock);
This->clock = clock;
}
static BOOL QualityControlRender_IsLate(QualityControlImpl *This, REFERENCE_TIME jitter,
REFERENCE_TIME start, REFERENCE_TIME stop)
{
REFERENCE_TIME max_lateness = 200000;
TRACE("%p " XTIME_FMT " " XTIME_FMT " " XTIME_FMT "\n",
This, XTIME(jitter), XTIME(start), XTIME(stop));
/* we can add a valid stop time */
if (stop >= start)
max_lateness += stop;
else
max_lateness += start;
/* if the jitter bigger than duration and lateness we are too late */
if (start + jitter > max_lateness) {
WARN("buffer is too late %i > %i\n", (int)((start + jitter)/10000), (int)(max_lateness/10000));
/* !!emergency!!, if we did not receive anything valid for more than a
* second, render it anyway so the user sees something */
if (This->last_in_time < 0 ||
start - This->last_in_time < 10000000)
return TRUE;
FIXME("A lot of buffers are being dropped.\n");
FIXME("There may be a timestamping problem, or this computer is too slow.\n");
}
This->last_in_time = start;
return FALSE;
}
void QualityControlRender_DoQOS(QualityControlImpl *priv)
{
REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
double rate;
TRACE("%p\n", priv);
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if (!priv->clock || priv->current_rstart < 0)
return;
start = priv->current_rstart;
stop = priv->current_rstop;
jitter = priv->current_jitter;
if (jitter < 0) {
/* this is the time the buffer entered the sink */
if (start < -jitter)
entered = 0;
else
entered = start + jitter;
left = start;
} else {
/* this is the time the buffer entered the sink */
entered = start + jitter;
/* this is the time the buffer left the sink */
left = start + jitter;
}
/* calculate duration of the buffer */
if (stop >= start)
duration = stop - start;
else
duration = 0;
/* if we have the time when the last buffer left us, calculate
* processing time */
if (priv->last_left >= 0) {
if (entered > priv->last_left) {
pt = entered - priv->last_left;
} else {
pt = 0;
}
} else {
pt = priv->avg_pt;
}
TRACE("start: " XTIME_FMT ", entered " XTIME_FMT ", left " XTIME_FMT ", pt: " XTIME_FMT ", "
"duration " XTIME_FMT ", jitter " XTIME_FMT "\n", XTIME(start), XTIME(entered),
XTIME(left), XTIME(pt), XTIME(duration), XTIME(jitter));
TRACE("avg_duration: " XTIME_FMT ", avg_pt: " XTIME_FMT ", avg_rate: %g\n",
XTIME(priv->avg_duration), XTIME(priv->avg_pt), priv->avg_rate);
/* collect running averages. for first observations, we copy the
* values */
if (priv->avg_duration < 0)
priv->avg_duration = duration;
else
priv->avg_duration = UPDATE_RUNNING_AVG (priv->avg_duration, duration);
if (priv->avg_pt < 0)
priv->avg_pt = pt;
else
priv->avg_pt = UPDATE_RUNNING_AVG (priv->avg_pt, pt);
if (priv->avg_duration != 0)
rate =
(double)priv->avg_pt /
(double)priv->avg_duration;
else
rate = 0.0;
if (priv->last_left >= 0) {
if (priv->is_dropped || priv->avg_rate < 0.0) {
priv->avg_rate = rate;
} else {
if (rate > 1.0)
priv->avg_rate = UPDATE_RUNNING_AVG_N (priv->avg_rate, rate);
else
priv->avg_rate = UPDATE_RUNNING_AVG_P (priv->avg_rate, rate);
}
}
if (priv->avg_rate >= 0.0) {
HRESULT hr;
Quality q;
/* if we have a valid rate, start sending QoS messages */
if (priv->current_jitter < 0) {
/* make sure we never go below 0 when adding the jitter to the
* timestamp. */
if (priv->current_rstart < -priv->current_jitter)
priv->current_jitter = -priv->current_rstart;
}
else
priv->current_jitter += (priv->current_rstop - priv->current_rstart);
q.Type = (jitter > 0 ? Famine : Flood);
q.Proportion = (LONG)(1000. / priv->avg_rate);
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if (q.Proportion < 200)
q.Proportion = 200;
else if (q.Proportion > 5000)
q.Proportion = 5000;
q.Late = priv->current_jitter;
q.TimeStamp = priv->current_rstart;
TRACE("Late: %i from %i, rate: %g\n", (int)(q.Late/10000), (int)(q.TimeStamp/10000), 1./priv->avg_rate);
hr = IQualityControl_Notify(&priv->IQualityControl_iface, priv->self, q);
priv->qos_handled = hr == S_OK;
}
/* record when this buffer will leave us */
priv->last_left = left;
}
void QualityControlRender_BeginRender(QualityControlImpl *This, REFERENCE_TIME start, REFERENCE_TIME stop)
{
This->start = -1;
This->current_rstart = start;
This->current_rstop = max(stop, start);
if (start >= 0)
{
REFERENCE_TIME now;
IReferenceClock_GetTime(This->clock, &now);
This->current_jitter = (now - This->clockstart) - start;
}
else
This->current_jitter = 0;
/* FIXME: This isn't correct; we don't drop samples, nor should. */
This->is_dropped = QualityControlRender_IsLate(This, This->current_jitter, start, stop);
TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000),
(int)(stop/10000), (int)(This->current_jitter / 10000));
if (This->is_dropped)
This->dropped++;
else
This->rendered++;
if (!This->clock)
return;
IReferenceClock_GetTime(This->clock, &This->start);
TRACE("at: " XTIME_FMT "\n", XTIME(This->start));
}
void QualityControlRender_EndRender(QualityControlImpl *This)
{
REFERENCE_TIME elapsed;
TRACE("%p\n", This);
if (!This->clock || This->start < 0 || FAILED(IReferenceClock_GetTime(This->clock, &This->stop)))
return;
elapsed = This->start - This->stop;
if (elapsed < 0)
return;
if (This->avg_render < 0)
This->avg_render = elapsed;
else
This->avg_render = UPDATE_RUNNING_AVG (This->avg_render, elapsed);
}