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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /dom/media/webaudio/AudioParamTimeline.h
parentInitial commit. (diff)
downloadthunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz
thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/media/webaudio/AudioParamTimeline.h')
-rw-r--r--dom/media/webaudio/AudioParamTimeline.h140
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diff --git a/dom/media/webaudio/AudioParamTimeline.h b/dom/media/webaudio/AudioParamTimeline.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef AudioParamTimeline_h_
+#define AudioParamTimeline_h_
+
+#include "AudioEventTimeline.h"
+#include "AudioNodeTrack.h"
+#include "AudioSegment.h"
+
+namespace mozilla::dom {
+
+// This helper class is used to represent the part of the AudioParam
+// class that gets sent to AudioNodeEngine instances. In addition to
+// AudioEventTimeline methods, it holds a pointer to an optional
+// AudioNodeTrack which represents the AudioNode inputs to the AudioParam.
+// This AudioNodeTrack is managed by the AudioParam subclass on the main
+// thread, and can only be obtained from the AudioNodeEngine instances
+// consuming this class.
+class AudioParamTimeline : public AudioEventTimeline {
+ typedef AudioEventTimeline BaseClass;
+
+ public:
+ explicit AudioParamTimeline(float aDefaultValue) : BaseClass(aDefaultValue) {}
+
+ AudioNodeTrack* Track() const { return mTrack; }
+
+ bool HasSimpleValue() const {
+ return BaseClass::HasSimpleValue() &&
+ (!mTrack || mTrack->LastChunks()[0].IsNull());
+ }
+
+ template <class TimeType>
+ float GetValueAtTime(TimeType aTime) {
+ return GetValueAtTime(aTime, 0);
+ }
+
+ template <typename TimeType>
+ void InsertEvent(const AudioTimelineEvent& aEvent) {
+ if (aEvent.mType == AudioTimelineEvent::Cancel) {
+ CancelScheduledValues(aEvent.Time<TimeType>());
+ return;
+ }
+ if (aEvent.mType == AudioTimelineEvent::Track) {
+ mTrack = aEvent.mTrack;
+ return;
+ }
+ if (aEvent.mType == AudioTimelineEvent::SetValue) {
+ AudioEventTimeline::SetValue(aEvent.mValue);
+ return;
+ }
+ AudioEventTimeline::InsertEvent<TimeType>(aEvent);
+ }
+
+ // Get the value of the AudioParam at time aTime + aCounter.
+ // aCounter here is an offset to aTime if we try to get the value in ticks,
+ // otherwise it should always be zero. aCounter is meant to be used when
+ template <class TimeType>
+ float GetValueAtTime(TimeType aTime, size_t aCounter);
+
+ // Get the values of the AudioParam at time aTime + (0 to aSize).
+ // aBuffer must have the correct aSize.
+ // aSize here is an offset to aTime if we try to get the value in ticks,
+ // otherwise it should always be zero. aSize is meant to be used when
+ // getting the value of an a-rate AudioParam for each tick inside an
+ // AudioNodeEngine implementation.
+ template <class TimeType>
+ void GetValuesAtTime(TimeType aTime, float* aBuffer, const size_t aSize);
+
+ virtual size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const {
+ return mTrack ? mTrack->SizeOfIncludingThis(aMallocSizeOf) : 0;
+ }
+
+ virtual size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const {
+ return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+ }
+
+ private:
+ float AudioNodeInputValue(size_t aCounter) const;
+
+ protected:
+ // This is created lazily when needed.
+ RefPtr<AudioNodeTrack> mTrack;
+};
+
+template <>
+inline float AudioParamTimeline::GetValueAtTime(double aTime, size_t aCounter) {
+ MOZ_ASSERT(!aCounter);
+
+ // Getting an AudioParam value on an AudioNode does not consider input from
+ // other AudioNodes, which is managed only on the graph thread.
+ return BaseClass::GetValueAtTime(aTime);
+}
+
+template <>
+inline float AudioParamTimeline::GetValueAtTime(int64_t aTime,
+ size_t aCounter) {
+ MOZ_ASSERT(aCounter < WEBAUDIO_BLOCK_SIZE);
+ MOZ_ASSERT(!aCounter || !HasSimpleValue());
+
+ // Mix the value of the AudioParam itself with that of the AudioNode inputs.
+ return BaseClass::GetValueAtTime(static_cast<int64_t>(aTime + aCounter)) +
+ (mTrack ? AudioNodeInputValue(aCounter) : 0.0f);
+}
+
+template <>
+inline void AudioParamTimeline::GetValuesAtTime(double aTime, float* aBuffer,
+ const size_t aSize) {
+ MOZ_ASSERT(aBuffer);
+ MOZ_ASSERT(aSize == 1);
+
+ // Getting an AudioParam value on an AudioNode does not consider input from
+ // other AudioNodes, which is managed only on the graph thread.
+ *aBuffer = BaseClass::GetValueAtTime(aTime);
+}
+
+template <>
+inline void AudioParamTimeline::GetValuesAtTime(int64_t aTime, float* aBuffer,
+ const size_t aSize) {
+ MOZ_ASSERT(aBuffer);
+ MOZ_ASSERT(aSize <= WEBAUDIO_BLOCK_SIZE);
+ MOZ_ASSERT(aSize == 1 || !HasSimpleValue());
+
+ // Mix the value of the AudioParam itself with that of the AudioNode inputs.
+ BaseClass::GetValuesAtTime(aTime, aBuffer, aSize);
+ if (mTrack) {
+ uint32_t blockOffset = aTime % WEBAUDIO_BLOCK_SIZE;
+ MOZ_ASSERT(blockOffset + aSize <= WEBAUDIO_BLOCK_SIZE);
+ for (size_t i = 0; i < aSize; ++i) {
+ aBuffer[i] += AudioNodeInputValue(blockOffset + i);
+ }
+ }
+}
+
+} // namespace mozilla::dom
+
+#endif