gecko-dev/content/media/AudioNodeEngine.cpp
Karl Tomlinson 4d914ea8a6 b=990794 crash on ovrfl in AllocateAudioBlock r=roc
--HG--
extra : transplant_source : %030X%15H%0DN%AA%7B%AEl%2Bi%2A%AB%3D%9C%23%0C%FF
2014-04-03 21:12:54 +13:00

241 lines
6.5 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"
#ifdef BUILD_ARM_NEON
#include "mozilla/arm.h"
#include "AudioNodeEngineNEON.h"
#endif
namespace mozilla {
void
AllocateAudioBlock(uint32_t aChannelCount, AudioChunk* aChunk)
{
CheckedInt<size_t> size = WEBAUDIO_BLOCK_SIZE;
size *= aChannelCount;
size *= sizeof(float);
if (!size.isValid()) {
MOZ_CRASH();
}
// XXX for SIMD purposes we should do something here to make sure the
// channel buffers are 16-byte aligned.
nsRefPtr<SharedBuffer> buffer = SharedBuffer::Create(size.value());
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);
MOZ_ASSERT(!aChunk->IsNull(), "You should pass a non-null chunk");
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 AudioBufferCopyWithScale(const float* aInput,
float aScale,
float* aOutput,
uint32_t aSize)
{
if (aScale == 1.0f) {
PodCopy(aOutput, aInput, aSize);
} else {
for (uint32_t i = 0; i < aSize; ++i) {
aOutput[i] = aInput[i]*aScale;
}
}
}
void AudioBufferAddWithScale(const float* aInput,
float aScale,
float* aOutput,
uint32_t aSize)
{
#ifdef BUILD_ARM_NEON
if (mozilla::supports_neon()) {
AudioBufferAddWithScale_NEON(aInput, aScale, aOutput, aSize);
return;
}
#endif
if (aScale == 1.0f) {
for (uint32_t i = 0; i < aSize; ++i) {
aOutput[i] += aInput[i];
}
} else {
for (uint32_t i = 0; i < aSize; ++i) {
aOutput[i] += aInput[i]*aScale;
}
}
}
void
AudioBlockAddChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
float aScale,
float aOutput[WEBAUDIO_BLOCK_SIZE])
{
AudioBufferAddWithScale(aInput, aScale, aOutput, WEBAUDIO_BLOCK_SIZE);
}
void
AudioBlockCopyChannelWithScale(const float* aInput,
float aScale,
float* aOutput)
{
if (aScale == 1.0f) {
memcpy(aOutput, aInput, WEBAUDIO_BLOCK_SIZE*sizeof(float));
} else {
#ifdef BUILD_ARM_NEON
if (mozilla::supports_neon()) {
AudioBlockCopyChannelWithScale_NEON(aInput, aScale, aOutput);
return;
}
#endif
for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
aOutput[i] = aInput[i]*aScale;
}
}
}
void
BufferComplexMultiply(const float* aInput,
const float* aScale,
float* aOutput,
uint32_t aSize)
{
for (uint32_t i = 0; i < aSize * 2; i += 2) {
float real1 = aInput[i];
float imag1 = aInput[i + 1];
float real2 = aScale[i];
float imag2 = aScale[i + 1];
float realResult = real1 * real2 - imag1 * imag2;
float imagResult = real1 * imag2 + imag1 * real2;
aOutput[i] = realResult;
aOutput[i + 1] = imagResult;
}
}
float
AudioBufferPeakValue(const float *aInput, uint32_t aSize)
{
float max = 0.0f;
for (uint32_t i = 0; i < aSize; i++) {
float mag = fabs(aInput[i]);
if (mag > max) {
max = mag;
}
}
return max;
}
void
AudioBlockCopyChannelWithScale(const float aInput[WEBAUDIO_BLOCK_SIZE],
const float aScale[WEBAUDIO_BLOCK_SIZE],
float aOutput[WEBAUDIO_BLOCK_SIZE])
{
#ifdef BUILD_ARM_NEON
if (mozilla::supports_neon()) {
AudioBlockCopyChannelWithScale_NEON(aInput, aScale, aOutput);
return;
}
#endif
for (uint32_t i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
aOutput[i] = aInput[i]*aScale[i];
}
}
void
AudioBlockInPlaceScale(float aBlock[WEBAUDIO_BLOCK_SIZE],
float aScale)
{
AudioBufferInPlaceScale(aBlock, aScale, WEBAUDIO_BLOCK_SIZE);
}
void
AudioBufferInPlaceScale(float* aBlock,
float aScale,
uint32_t aSize)
{
if (aScale == 1.0f) {
return;
}
#ifdef BUILD_ARM_NEON
if (mozilla::supports_neon()) {
AudioBufferInPlaceScale_NEON(aBlock, aScale, aSize);
return;
}
#endif
for (uint32_t i = 0; i < aSize; ++i) {
*aBlock++ *= aScale;
}
}
void
AudioBlockPanMonoToStereo(const float aInput[WEBAUDIO_BLOCK_SIZE],
float aGainL, float aGainR,
float aOutputL[WEBAUDIO_BLOCK_SIZE],
float aOutputR[WEBAUDIO_BLOCK_SIZE])
{
AudioBlockCopyChannelWithScale(aInput, aGainL, aOutputL);
AudioBlockCopyChannelWithScale(aInput, aGainR, aOutputR);
}
void
AudioBlockPanStereoToStereo(const float aInputL[WEBAUDIO_BLOCK_SIZE],
const float aInputR[WEBAUDIO_BLOCK_SIZE],
float aGainL, float aGainR, bool aIsOnTheLeft,
float aOutputL[WEBAUDIO_BLOCK_SIZE],
float aOutputR[WEBAUDIO_BLOCK_SIZE])
{
#ifdef BUILD_ARM_NEON
if (mozilla::supports_neon()) {
AudioBlockPanStereoToStereo_NEON(aInputL, aInputR,
aGainL, aGainR, aIsOnTheLeft,
aOutputL, aOutputR);
return;
}
#endif
uint32_t i;
if (aIsOnTheLeft) {
for (i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
*aOutputL++ = *aInputL++ + *aInputR * aGainL;
*aOutputR++ = *aInputR++ * aGainR;
}
} else {
for (i = 0; i < WEBAUDIO_BLOCK_SIZE; ++i) {
*aOutputL++ = *aInputL * aGainL;
*aOutputR++ = *aInputR++ + *aInputL++ * aGainR;
}
}
}
float
AudioBufferSumOfSquares(const float* aInput, uint32_t aLength)
{
float sum = 0.0f;
while (aLength--) {
sum += *aInput * *aInput;
++aInput;
}
return sum;
}
}