static JsVar *jswrap_waveform_getBuffer(JsVar *waveform, int bufferNumber, bool *is16Bit) {
JsVar *buffer = jsvObjectGetChild(waveform, (bufferNumber==0)?"buffer":"buffer2", 0);
if (!buffer) return 0;
if (is16Bit) {
*is16Bit = false;
if (jsvIsArrayBuffer(buffer) && JSV_ARRAYBUFFER_GET_SIZE(buffer->varData.arraybuffer.type)==2)
*is16Bit = true;
}
// plough through to get array buffer data
JsVar *backingString = jsvGetArrayBufferBackingString(buffer);
jsvUnLock(buffer);
return backingString;
}
// --------------------------------------------------------------------------------------------
void jsvArrayBufferIteratorNew(JsvArrayBufferIterator *it, JsVar *arrayBuffer, size_t index) {
assert(jsvIsArrayBuffer(arrayBuffer));
it->index = index;
it->type = arrayBuffer->varData.arraybuffer.type;
it->byteLength = arrayBuffer->varData.arraybuffer.length * JSV_ARRAYBUFFER_GET_SIZE(it->type);
it->byteOffset = arrayBuffer->varData.arraybuffer.byteOffset;
JsVar *arrayBufferData = jsvGetArrayBufferBackingString(arrayBuffer);
it->byteLength += it->byteOffset; // because we'll check if we have more bytes using this
it->byteOffset = it->byteOffset + index*JSV_ARRAYBUFFER_GET_SIZE(it->type);
if (it->byteOffset>=(it->byteLength+1-JSV_ARRAYBUFFER_GET_SIZE(it->type))) {
jsvUnLock(arrayBufferData);
it->type = ARRAYBUFFERVIEW_UNDEFINED;
return;
}
jsvStringIteratorNew(&it->it, arrayBufferData, (size_t)it->byteOffset);
jsvUnLock(arrayBufferData);
it->hasAccessedElement = false;
}