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https://gitlab.winehq.org/wine/wine-gecko.git
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72 lines
2.2 KiB
C++
72 lines
2.2 KiB
C++
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/* -*- 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 "AudioNodeEngine.h"
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namespace mozilla {
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void
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AllocateAudioBlock(uint32_t aChannelCount, AudioChunk* aChunk)
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{
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// XXX for SIMD purposes we should do something here to make sure the
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// channel buffers are 16-byte aligned.
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nsRefPtr<SharedBuffer> buffer =
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SharedBuffer::Create(WEBAUDIO_BLOCK_SIZE*aChannelCount*sizeof(float));
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aChunk->mDuration = WEBAUDIO_BLOCK_SIZE;
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aChunk->mChannelData.SetLength(aChannelCount);
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float* data = static_cast<float*>(buffer->Data());
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for (uint32_t i = 0; i < aChannelCount; ++i) {
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aChunk->mChannelData[i] = data + i*WEBAUDIO_BLOCK_SIZE;
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}
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aChunk->mBuffer = buffer.forget();
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aChunk->mVolume = 1.0f;
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aChunk->mBufferFormat = AUDIO_FORMAT_FLOAT32;
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}
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void
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WriteZeroesToAudioBlock(AudioChunk* aChunk, uint32_t aStart, uint32_t aLength)
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{
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MOZ_ASSERT(aStart + aLength <= WEBAUDIO_BLOCK_SIZE);
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if (aLength == 0)
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return;
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for (uint32_t i = 0; i < aChunk->mChannelData.Length(); ++i) {
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memset(static_cast<float*>(const_cast<void*>(aChunk->mChannelData[i])) + aStart,
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0, aLength*sizeof(float));
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}
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}
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void
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AudioBlockAddChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
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float aScale,
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float aOutput[WEBAUDIO_BLOCK_SIZE])
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{
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if (aScale == 1.0f) {
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for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
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aOutput[i] += aInput[i];
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}
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} else {
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for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
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aOutput[i] += aInput[i]*aScale;
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}
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}
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}
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void
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AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
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float aScale,
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float aOutput[WEBAUDIO_BLOCK_SIZE])
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{
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if (aScale == 1.0f) {
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memcpy(aOutput, aInput, WEBAUDIO_BLOCK_SIZE*sizeof(float));
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} else {
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for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
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aOutput[i] = aInput[i]*aScale;
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}
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}
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}
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}
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