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Issue #1589 - Ensure computed length and data is always available

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This commit is contained in:
wolfbeast 2020-05-10 14:37:50 +02:00 • committed by Roy Tam
commit 84053aba97
1 changed files with 6 additions and 4 deletions
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10
dom/media/webaudio/AudioBuffer.cpp
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@ -254,6 +254,9 @@ void
AudioBuffer::CopyFromChannel(const Float32Array& aDestination, uint32_t aChannelNumber,
uint32_t aStartInChannel, ErrorResult& aRv)
{
JS::AutoCheckCannotGC nogc;
aDestination.ComputeLengthAndData();
uint32_t length = aDestination.Length();
CheckedInt<uint32_t> end = aStartInChannel;
end += length;
@ -263,8 +266,6 @@ AudioBuffer::CopyFromChannel(const Float32Array& aDestination, uint32_t aChannel
return;
}
JS::AutoCheckCannotGC nogc;
aDestination.ComputeLengthAndData();
JSObject* channelArray = mJSChannels[aChannelNumber];
const float* sourceData = nullptr;
if (channelArray) {
@ -295,6 +296,9 @@ AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
uint32_t aChannelNumber, uint32_t aStartInChannel,
ErrorResult& aRv)
{
JS::AutoCheckCannotGC nogc;
aSource.ComputeLengthAndData();
uint32_t length = aSource.Length();
CheckedInt<uint32_t> end = aStartInChannel;
end += length;
@ -309,7 +313,6 @@ AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
return;
}
JS::AutoCheckCannotGC nogc;
JSObject* channelArray = mJSChannels[aChannelNumber];
if (JS_GetTypedArrayLength(channelArray) != mLength) {
// The array's buffer was detached.
@ -317,7 +320,6 @@ AudioBuffer::CopyToChannel(JSContext* aJSContext, const Float32Array& aSource,
return;
}
aSource.ComputeLengthAndData();
bool isShared = false;
float* channelData = JS_GetFloat32ArrayData(channelArray, &isShared, nogc);
// The channelData arrays should all have originated in