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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WebAudioUtils.h"
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#include "AudioNodeStream.h"
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namespace mozilla {
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namespace dom {
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struct ConvertTimeToTickHelper
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{
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AudioNodeStream* mSourceStream;
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AudioNodeStream* mDestinationStream;
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static int64_t Convert(double aTime, void* aClosure)
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{
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TrackRate sampleRate = IdealAudioRate();
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StreamTime streamTime;
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ConvertTimeToTickHelper* This = static_cast<ConvertTimeToTickHelper*> (aClosure);
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if (This->mSourceStream) {
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TrackTicks tick = This->mDestinationStream->GetCurrentPosition();
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StreamTime destinationStreamTime = TicksToTimeRoundDown(sampleRate, tick);
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GraphTime graphTime = This->mDestinationStream->StreamTimeToGraphTime(destinationStreamTime);
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streamTime = This->mSourceStream->GraphTimeToStreamTime(graphTime);
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} else {
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streamTime = This->mDestinationStream->GetCurrentPosition();
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}
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return TimeToTicksRoundDown(sampleRate, streamTime + SecondsToMediaTime(aTime));
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}
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};
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void
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WebAudioUtils::ConvertAudioParamToTicks(AudioParamTimeline& aParam,
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AudioNodeStream* aSource,
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AudioNodeStream* aDest)
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{
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ConvertTimeToTickHelper ctth;
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ctth.mSourceStream = aSource;
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ctth.mDestinationStream = aDest;
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aParam.ConvertEventTimesToTicks(ConvertTimeToTickHelper::Convert, &ctth);
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}
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}
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}
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