Sweden-Number/dlls/strmbase/qualitycontrol.c

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/*
* Quality Control Interfaces
*
2010-12-11 14:25:28 +01:00
* 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);
static inline struct strmbase_qc *impl_from_IQualityControl(IQualityControl *iface)
{
return CONTAINING_RECORD(iface, struct strmbase_qc, IQualityControl_iface);
}
static HRESULT WINAPI quality_control_QueryInterface(IQualityControl *iface, REFIID riid, void **ppv)
{
struct strmbase_qc *This = impl_from_IQualityControl(iface);
return IBaseFilter_QueryInterface(&This->pin->filter->IBaseFilter_iface, riid, ppv);
}
static ULONG WINAPI quality_control_AddRef(IQualityControl *iface)
{
struct strmbase_qc *This = impl_from_IQualityControl(iface);
return IBaseFilter_AddRef(&This->pin->filter->IBaseFilter_iface);
}
static ULONG WINAPI quality_control_Release(IQualityControl *iface)
{
struct strmbase_qc *This = impl_from_IQualityControl(iface);
return IBaseFilter_Release(&This->pin->filter->IBaseFilter_iface);
}
static HRESULT WINAPI quality_control_Notify(IQualityControl *iface, IBaseFilter *sender, Quality qm)
{
struct strmbase_qc *This = impl_from_IQualityControl(iface);
HRESULT hr = S_FALSE;
TRACE("iface %p, sender %p, type %#x, proportion %u, late %s, timestamp %s.\n",
iface, sender, qm.Type, qm.Proportion, debugstr_time(qm.Late), debugstr_time(qm.TimeStamp));
if (This->tonotify)
return IQualityControl_Notify(This->tonotify, &This->pin->filter->IBaseFilter_iface, qm);
if (This->pin->peer)
{
IQualityControl *qc = NULL;
IPin_QueryInterface(This->pin->peer, &IID_IQualityControl, (void **)&qc);
if (qc)
{
hr = IQualityControl_Notify(qc, &This->pin->filter->IBaseFilter_iface, qm);
IQualityControl_Release(qc);
}
}
return hr;
}
static HRESULT WINAPI quality_control_SetSink(IQualityControl *iface, IQualityControl *tonotify)
{
struct strmbase_qc *This = impl_from_IQualityControl(iface);
TRACE("%p %p\n", This, tonotify);
This->tonotify = tonotify;
return S_OK;
}
static const IQualityControlVtbl quality_control_vtbl =
{
quality_control_QueryInterface,
quality_control_AddRef,
quality_control_Release,
quality_control_Notify,
quality_control_SetSink,
};
/* 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(struct strmbase_qc *This, REFERENCE_TIME 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 */
}
static BOOL QualityControlRender_IsLate(struct strmbase_qc *This, REFERENCE_TIME jitter,
REFERENCE_TIME start, REFERENCE_TIME stop)
{
REFERENCE_TIME max_lateness = 200000;
TRACE("jitter %s, start %s, stop %s.\n", debugstr_time(jitter),
debugstr_time(start), debugstr_time(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(struct strmbase_qc *priv)
{
REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
double rate;
TRACE("%p\n", priv);
if (!priv->pin->filter->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 %s, entered %s, left %s, pt %s, duration %s, jitter %s.\n",
debugstr_time(start), debugstr_time(entered), debugstr_time(left),
debugstr_time(pt), debugstr_time(duration), debugstr_time(jitter));
TRACE("average duration %s, average pt %s, average rate %.16e.\n",
debugstr_time(priv->avg_duration), debugstr_time(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);
2010-11-29 10:44:15 +01:00
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: %s from %s, rate: %g\n", debugstr_time(q.Late), debugstr_time(q.TimeStamp), 1./priv->avg_rate);
hr = IQualityControl_Notify(&priv->IQualityControl_iface, &priv->pin->filter->IBaseFilter_iface, q);
priv->qos_handled = hr == S_OK;
}
/* record when this buffer will leave us */
priv->last_left = left;
}
void QualityControlRender_BeginRender(struct strmbase_qc *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->pin->filter->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 %d, start %s, stop %s, jitter %s.\n", This->is_dropped,
debugstr_time(start), debugstr_time(stop), debugstr_time(This->current_jitter));
if (This->is_dropped)
This->dropped++;
else
This->rendered++;
if (!This->pin->filter->clock)
return;
IReferenceClock_GetTime(This->pin->filter->clock, &This->start);
TRACE("Starting at %s.\n", debugstr_time(This->start));
}
void QualityControlRender_EndRender(struct strmbase_qc *This)
{
REFERENCE_TIME elapsed;
TRACE("%p\n", This);
if (!This->pin->filter->clock || This->start < 0
|| FAILED(IReferenceClock_GetTime(This->pin->filter->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);
}
void strmbase_qc_init(struct strmbase_qc *qc, struct strmbase_pin *pin)
{
memset(qc, 0, sizeof(*qc));
qc->pin = pin;
qc->current_rstart = qc->current_rstop = -1;
qc->IQualityControl_iface.lpVtbl = &quality_control_vtbl;
}