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598f705578
Backed out changeset 80e8530f06ea (bug 804387) Backed out changeset 3de2271ad47f (bug 804387) Backed out changeset 00f86870931c (bug 804837) Backed out changeset 0e3f20927c50 (bug 804387) Backed out changeset e6ef90038007 (bug 804387) Backed out changeset 0ad6f67a95f9 (bug 804387) Backed out changeset d0772aba503c (bug 804387) Backed out changeset 5477b87ff03e (bug 804387) Backed out changeset 1d7ec5adc49f (bug 804387) Backed out changeset 11f4d740cd6c (bug 804387) Backed out changeset e6254d8997ab (bug 804387) Backed out changeset 372322f3264d (bug 804387) Backed out changeset 53d5ed687612 (bug 804387) Backed out changeset 000b88ac40a7 (bug 804387)
72 lines
2.2 KiB
C++
72 lines
2.2 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 "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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