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