strmbase_private.h File Reference

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Classes
struct	QualityControlImpl

Typedefs
typedef struct QualityControlImpl	QualityControlImpl

Functions
HRESULT	QualityControlImpl_Create (IPin *input, IBaseFilter *self, QualityControlImpl **ppv)
void	QualityControlImpl_Destroy (QualityControlImpl *This)
HRESULT WINAPI	QualityControlImpl_QueryInterface (IQualityControl *iface, REFIID riid, void **ppv)
ULONG WINAPI	QualityControlImpl_AddRef (IQualityControl *iface)
ULONG WINAPI	QualityControlImpl_Release (IQualityControl *iface)
HRESULT WINAPI	QualityControlImpl_Notify (IQualityControl *iface, IBaseFilter *sender, Quality qm)
HRESULT WINAPI	QualityControlImpl_SetSink (IQualityControl *iface, IQualityControl *tonotify)
void	QualityControlRender_Start (QualityControlImpl *This, REFERENCE_TIME tStart)
void	QualityControlRender_SetClock (QualityControlImpl *This, IReferenceClock *clock)
HRESULT	QualityControlRender_WaitFor (QualityControlImpl *This, IMediaSample *sample, HANDLE ev)
void	QualityControlRender_DoQOS (QualityControlImpl *priv)
void	QualityControlRender_BeginRender (QualityControlImpl *This)
void	QualityControlRender_EndRender (QualityControlImpl *This)

Typedef Documentation

QualityControlImpl

typedef struct QualityControlImpl QualityControlImpl

Function Documentation

QualityControlImpl_AddRef()

ULONG WINAPI QualityControlImpl_AddRef

(

IQualityControl *

iface

)

Definition at line 75 of file qualitycontrol.c.

{
    QualityControlImpl *This = impl_from_IQualityControl(iface);
    return IBaseFilter_AddRef(This->self);
}

QualityControlImpl_Create()

HRESULT QualityControlImpl_Create	(	IPin *	input,
		IBaseFilter *	self,
		QualityControlImpl **	ppv
	)

Definition at line 42 of file qualitycontrol.c.

{
    QualityControlImpl *This;
    TRACE("%p, %p, %p\n", input, self, ppv);
    *ppv = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(QualityControlImpl));
    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;
}

Referenced by BaseRenderer_Init(), and TransformFilter_Init().

QualityControlImpl_Destroy()

void QualityControlImpl_Destroy

(

QualityControlImpl *

This

)

Definition at line 59 of file qualitycontrol.c.

{
    HeapFree(GetProcessHeap(),0,This);
}

Referenced by BaseRendererImpl_Release(), and TransformFilterImpl_Release().

QualityControlImpl_Notify()

HRESULT WINAPI QualityControlImpl_Notify	(	IQualityControl *	iface,
		IBaseFilter *	sender,
		Quality	qm
	)

Definition at line 87 of file qualitycontrol.c.

{
    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;
}

Referenced by TransformFilterImpl_Notify().

QualityControlImpl_QueryInterface()

HRESULT WINAPI QualityControlImpl_QueryInterface	(	IQualityControl *	iface,
		REFIID	riid,
		void **	ppv
	)

Definition at line 69 of file qualitycontrol.c.

{
    QualityControlImpl *This = impl_from_IQualityControl(iface);
    return IBaseFilter_QueryInterface(This->self, riid, ppv);
}

QualityControlImpl_Release()

ULONG WINAPI QualityControlImpl_Release

(

IQualityControl *

iface

)

Definition at line 81 of file qualitycontrol.c.

{
    QualityControlImpl *This = impl_from_IQualityControl(iface);
    return IBaseFilter_Release(This->self);
}

QualityControlImpl_SetSink()

HRESULT WINAPI QualityControlImpl_SetSink	(	IQualityControl *	iface,
		IQualityControl *	tonotify
	)

Definition at line 116 of file qualitycontrol.c.

{
    QualityControlImpl *This = impl_from_IQualityControl(iface);
    TRACE("%p %p\n", This, tonotify);
    This->tonotify = tonotify;
    return S_OK;
}

QualityControlRender_BeginRender()

void QualityControlRender_BeginRender

(

QualityControlImpl *

This

)

Definition at line 336 of file qualitycontrol.c.

{
    TRACE("%p\n", This);
 
    This->start = -1;
 
    if (!This->clock)
        return;
 
    IReferenceClock_GetTime(This->clock, &This->start);
    TRACE("at: " XTIME_FMT "\n", XTIME(This->start));
}

Referenced by BaseRendererImpl_Receive().

QualityControlRender_DoQOS()

void QualityControlRender_DoQOS

(

QualityControlImpl *

priv

)

Definition at line 223 of file qualitycontrol.c.

{
    REFERENCE_TIME start, stop, jitter, pt, entered, left, duration;
    double rate;
 
    TRACE("%p\n", priv);
 
    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);
        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;
}

Referenced by BaseRendererImpl_Receive().

QualityControlRender_EndRender()

void QualityControlRender_EndRender

(

QualityControlImpl *

This

)

Definition at line 349 of file qualitycontrol.c.

{
    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);
}

Referenced by BaseRendererImpl_Receive().

QualityControlRender_SetClock()

void QualityControlRender_SetClock	(	QualityControlImpl *	This,
		IReferenceClock *	clock
	)

Definition at line 148 of file qualitycontrol.c.

{
    TRACE("%p %p\n", This, clock);
    This->clock = clock;
}

Referenced by BaseRendererImpl_SetSyncSource().

QualityControlRender_Start()

void QualityControlRender_Start	(	QualityControlImpl *	This,
		REFERENCE_TIME	tStart
	)

Definition at line 136 of file qualitycontrol.c.

{
    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 */
}

Referenced by BaseRendererImpl_EndFlush(), and BaseRendererImpl_Run().

QualityControlRender_WaitFor()

HRESULT QualityControlRender_WaitFor	(	QualityControlImpl *	This,
		IMediaSample *	sample,
		HANDLE	ev
	)

Definition at line 183 of file qualitycontrol.c.

{
    REFERENCE_TIME start = -1, stop = -1, jitter = 0;
 
    TRACE("%p %p %p\n", This, sample, ev);
 
    This->current_rstart = This->current_rstop = -1;
    This->current_jitter = 0;
    if (!This->clock || FAILED(IMediaSample_GetTime(sample, &start, &stop)))
        return S_OK;
 
    if (start >= 0) {
        REFERENCE_TIME now;
        IReferenceClock_GetTime(This->clock, &now);
        now -= This->clockstart;
 
        jitter = now - start;
        if (jitter <= -10000) {
            DWORD_PTR cookie;
            IReferenceClock_AdviseTime(This->clock, This->clockstart, start, (HEVENT)ev, &cookie);
            WaitForSingleObject(ev, INFINITE);
            IReferenceClock_Unadvise(This->clock, cookie);
        }
    }
    else
        start = stop = -1;
    This->current_rstart = start;
    This->current_rstop = stop > start ? stop : start;
    This->current_jitter = jitter;
    This->is_dropped = QualityControlRender_IsLate(This, jitter, start, stop);
    TRACE("Dropped: %i %i %i %i\n", This->is_dropped, (int)(start/10000), (int)(stop/10000), (int)(jitter / 10000));
    if (This->is_dropped) {
        This->dropped++;
        if (!This->qos_handled)
            return S_FALSE;
    } else
        This->rendered++;
    return S_OK;
}

Referenced by BaseRendererImpl_Receive().