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feat(pipeline): Add nodes related to direct sound path simulation.
Signed-off-by: Axel Nana <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| // Copyright (c) 2024-present Sparky Studios. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| #include <DSP/Delay.h> | ||
|
|
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| namespace SparkyStudios::Audio::Amplitude | ||
| { | ||
| Delay::Delay(AmSize maxDelay, AmSize framesCount) | ||
| : _maxDelay(maxDelay) | ||
| , _framesCount(framesCount) | ||
| , _writePos(0) | ||
| { | ||
| AMPLITUDE_ASSERT(_framesCount > 0); | ||
| SetMaxDelay(maxDelay); | ||
| } | ||
|
|
||
| Delay::~Delay() | ||
| { | ||
| _buffer.reset(nullptr); | ||
| } | ||
|
|
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| void Delay::SetMaxDelay(AmSize maxDelay) | ||
| { | ||
| _maxDelay = maxDelay; | ||
| const AmSize newFramesCount = _framesCount + _maxDelay; | ||
|
|
||
| if (_buffer == nullptr) | ||
| { | ||
| _buffer.reset(ampoolnew(MemoryPoolKind::Filtering, AudioBuffer, newFramesCount, 1)); | ||
| _buffer->Clear(); | ||
| return; | ||
| } | ||
|
|
||
| AudioBufferChannel* channel = &_buffer->GetChannel(0); | ||
| const AmSize oldFramesCount = _buffer->GetFrameCount(); | ||
|
|
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| if (newFramesCount > oldFramesCount) | ||
| { | ||
| AmUniquePtr<MemoryPoolKind::Filtering, AudioBuffer> newBuffer( | ||
| ampoolnew(MemoryPoolKind::Filtering, AudioBuffer, newFramesCount, 1)); | ||
| newBuffer->Clear(); | ||
|
|
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| std::copy(channel->begin() + _writePos, channel->end(), newBuffer->GetChannel(0).begin()); | ||
|
|
||
| if (_writePos > 0) | ||
| { | ||
| std::copy(channel->begin(), channel->begin() + _writePos, newBuffer->GetChannel(0).begin() + oldFramesCount - _writePos); | ||
| _writePos = oldFramesCount; | ||
| } | ||
|
|
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| _buffer = std::move(newBuffer); | ||
| } | ||
| } | ||
|
|
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| AmSize Delay::GetMaxDelay() const | ||
| { | ||
| return _maxDelay; | ||
| } | ||
|
|
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| AmSize Delay::GetDelayInSamples() const | ||
| { | ||
| return _buffer->GetFrameCount(); | ||
| } | ||
|
|
||
| void Delay::Clear() | ||
| { | ||
| _buffer->Clear(); | ||
| } | ||
|
|
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| void Delay::Insert(const AudioBufferChannel& channel) | ||
| { | ||
| AMPLITUDE_ASSERT(_buffer != nullptr); | ||
| AMPLITUDE_ASSERT(channel.size() == _framesCount); | ||
|
|
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| const AmSize delayBufferSize = _buffer->GetFrameCount(); | ||
|
|
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| // Record the remaining space in the _buffer after the write cursor. | ||
| const AmSize remainingSizeWrite = delayBufferSize - _writePos; | ||
| AudioBufferChannel* delayChannel = &(*_buffer)[0]; | ||
|
|
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| // Copy the channel into the delay line. | ||
| if (remainingSizeWrite >= _framesCount) | ||
| { | ||
| AMPLITUDE_ASSERT(delayChannel->begin() + _writePos + _framesCount <= delayChannel->end()); | ||
| std::copy(channel.begin(), channel.end(), delayChannel->begin() + _writePos); | ||
| } | ||
| else | ||
| { | ||
| AMPLITUDE_ASSERT(delayChannel->begin() + _writePos + remainingSizeWrite <= delayChannel->end()); | ||
| AMPLITUDE_ASSERT(channel.begin() + remainingSizeWrite <= channel.end()); | ||
| std::copy(channel.begin(), channel.begin() + remainingSizeWrite, delayChannel->begin() + _writePos); | ||
| AMPLITUDE_ASSERT(delayChannel->begin() + remainingSizeWrite <= delayChannel->end()); | ||
| std::copy(channel.begin() + remainingSizeWrite, channel.end(), delayChannel->begin()); | ||
| } | ||
|
|
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| _writePos = (_writePos + _framesCount) % delayBufferSize; | ||
| } | ||
|
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| void Delay::Process(AudioBufferChannel& channel, AmSize delaySamples) | ||
| { | ||
| AMPLITUDE_ASSERT(_buffer != nullptr); | ||
| AMPLITUDE_ASSERT(delaySamples >= 0U); | ||
| AMPLITUDE_ASSERT(delaySamples <= _maxDelay); | ||
|
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| const AmSize delayBufferSize = _buffer->GetFrameCount(); | ||
| // Position in the delay line to begin reading from. | ||
| AMPLITUDE_ASSERT(_writePos + delayBufferSize >= delaySamples + _framesCount); | ||
| const AmSize readCursor = (_writePos + delayBufferSize - delaySamples - _framesCount) % delayBufferSize; | ||
| // Record the remaining space in the _buffer after the read cursor. | ||
| const AmSize remainingSizeRead = delayBufferSize - readCursor; | ||
| AudioBufferChannel* delayChannel = &(*_buffer)[0]; | ||
|
|
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| // Extract a portion of the delay line into the channel. | ||
| if (remainingSizeRead >= _framesCount) | ||
| { | ||
| AMPLITUDE_ASSERT(channel.begin() + _framesCount <= channel.end()); | ||
| AMPLITUDE_ASSERT(delayChannel->begin() + readCursor + _framesCount <= delayChannel->end()); | ||
| std::copy(delayChannel->begin() + readCursor, delayChannel->begin() + readCursor + _framesCount, channel.begin()); | ||
| } | ||
| else | ||
| { | ||
| AMPLITUDE_ASSERT(channel.begin() + delayChannel->size() - readCursor <= channel.end()); | ||
| std::copy(delayChannel->begin() + readCursor, delayChannel->end(), channel.begin()); | ||
|
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| AMPLITUDE_ASSERT(channel.begin() + _framesCount <= channel.end()); | ||
| AMPLITUDE_ASSERT(delayChannel->begin() + _framesCount - remainingSizeRead <= delayChannel->end()); | ||
| std::copy(delayChannel->begin(), delayChannel->begin() + _framesCount - remainingSizeRead, channel.begin() + remainingSizeRead); | ||
| } | ||
| } | ||
| } // namespace SparkyStudios::Audio::Amplitude |
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