mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/* -*- 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 DelayProcessor_h_
|
|
#define DelayProcessor_h_
|
|
|
|
#include "nsTArray.h"
|
|
|
|
namespace mozilla {
|
|
|
|
class DelayProcessor {
|
|
public:
|
|
// See WebAudioUtils::ComputeSmoothingRate() for frame to frame exponential
|
|
// |smoothingRate| multiplier.
|
|
DelayProcessor(int aMaxDelayFrames, double aSmoothingRate)
|
|
: mSmoothingRate(aSmoothingRate)
|
|
, mCurrentDelay(0.)
|
|
, mMaxDelayFrames(aMaxDelayFrames)
|
|
, mWriteIndex(0)
|
|
{
|
|
}
|
|
|
|
// Process with an array of delays, in frames, for each frame.
|
|
void Process(const double *aPerFrameDelays,
|
|
const float* const* aInputChannels,
|
|
float* const* aOutputChannels,
|
|
int aChannelCount, int aFramesToProcess);
|
|
|
|
// Process with a constant delay, which will be smoothed with the previous
|
|
// delay.
|
|
void Process(double aDelayFrames, const float* const* aInputChannels,
|
|
float* const* aOutputChannels, int aChannelCount,
|
|
int aFramesToProcess);
|
|
|
|
void Reset() { mBuffer.Clear(); };
|
|
|
|
double CurrentDelayFrames() const { return mCurrentDelay; }
|
|
int BufferChannelCount() const { return mBuffer.Length(); }
|
|
|
|
private:
|
|
bool EnsureBuffer(uint32_t aNumberOfChannels);
|
|
|
|
// Circular buffer for capturing delayed samples.
|
|
AutoFallibleTArray<FallibleTArray<float>, 2> mBuffer;
|
|
double mSmoothingRate;
|
|
// Current delay, in fractional frames
|
|
double mCurrentDelay;
|
|
// Maximum delay, in frames
|
|
int mMaxDelayFrames;
|
|
// Write index for the buffer, to write the frames to the correct index of the buffer
|
|
// given the current delay.
|
|
int mWriteIndex;
|
|
};
|
|
|
|
} // mozilla
|
|
|
|
#endif // DelayProcessor_h_
|