mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
f76919f8a0
Modifies MediaStreamGraph to always advance its time by a multiple of WEBAUDIO_BLOCK_SIZE. --HG-- extra : rebase_source : 99524b09edd4ac0e1bc6607f2ba14925bc2f11c2
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 -*- */
|
|
/* 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/. */
|
|
|
|
#include "AudioNodeEngine.h"
|
|
|
|
namespace mozilla {
|
|
|
|
void
|
|
AllocateAudioBlock(uint32_t aChannelCount, AudioChunk* aChunk)
|
|
{
|
|
// XXX for SIMD purposes we should do something here to make sure the
|
|
// channel buffers are 16-byte aligned.
|
|
nsRefPtr<SharedBuffer> buffer =
|
|
SharedBuffer::Create(WEBAUDIO_BLOCK_SIZE*aChannelCount*sizeof(float));
|
|
aChunk->mDuration = WEBAUDIO_BLOCK_SIZE;
|
|
aChunk->mChannelData.SetLength(aChannelCount);
|
|
float* data = static_cast<float*>(buffer->Data());
|
|
for (uint32_t i = 0; i < aChannelCount; ++i) {
|
|
aChunk->mChannelData[i] = data + i*WEBAUDIO_BLOCK_SIZE;
|
|
}
|
|
aChunk->mBuffer = buffer.forget();
|
|
aChunk->mVolume = 1.0f;
|
|
aChunk->mBufferFormat = AUDIO_FORMAT_FLOAT32;
|
|
}
|
|
|
|
void
|
|
WriteZeroesToAudioBlock(AudioChunk* aChunk, uint32_t aStart, uint32_t aLength)
|
|
{
|
|
MOZ_ASSERT(aStart + aLength <= WEBAUDIO_BLOCK_SIZE);
|
|
if (aLength == 0)
|
|
return;
|
|
for (uint32_t i = 0; i < aChunk->mChannelData.Length(); ++i) {
|
|
memset(static_cast<float*>(const_cast<void*>(aChunk->mChannelData[i])) + aStart,
|
|
0, aLength*sizeof(float));
|
|
}
|
|
}
|
|
|
|
void
|
|
AudioBlockAddChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
|
|
float aScale,
|
|
float aOutput[WEBAUDIO_BLOCK_SIZE])
|
|
{
|
|
if (aScale == 1.0f) {
|
|
for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
|
|
aOutput[i] += aInput[i];
|
|
}
|
|
} else {
|
|
for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
|
|
aOutput[i] += aInput[i]*aScale;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
|
|
float aScale,
|
|
float aOutput[WEBAUDIO_BLOCK_SIZE])
|
|
{
|
|
if (aScale == 1.0f) {
|
|
memcpy(aOutput, aInput, WEBAUDIO_BLOCK_SIZE*sizeof(float));
|
|
} else {
|
|
for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
|
|
aOutput[i] = aInput[i]*aScale;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|