/*JSON{ "type":"constructor", "class": "Waveform", "name": "Waveform", "ifndef" : "SAVE_ON_FLASH",
"description" : [ "Create a waveform class. This allows high speed input and output of waveforms. It has an internal variable called `buffer` (as well as `buffer2` when double-buffered - see `options` below) which contains the data to input/output.",
"When double-buffered, a 'buffer' event will be emitted each time a buffer is finished with (the argument is that buffer). When the recording stops, a 'finish' event will be emitted (with the first argument as the buffer)." ],
"generate" : "jswrap_waveform_constructor",
"params" : [ [ "samples", "int32", "The number of samples" ],
[ "options", "JsVar", "Optional options struct `{doubleBuffer:bool, bits : 8/16}` where: `doubleBuffer` is whether to allocate two buffers or not (default false), and bits is the amount of bits to use (default 8)." ] ],
"return" : [ "JsVar", "An Waveform object" ]
}*/
JsVar *jswrap_waveform_constructor(int samples, JsVar *options) {
if (samples<=0) {
jsExceptionHere(JSET_ERROR, "Samples must be greater than 0");
return 0;
}
bool doubleBuffer = false;
bool use16bit = false;
if (jsvIsObject(options)) {
doubleBuffer = jsvGetBoolAndUnLock(jsvObjectGetChild(options, "doubleBuffer", 0));
int bits = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(options, "bits", 0));
if (bits!=0 && bits!=8 && bits!=16) {
jsExceptionHere(JSET_ERROR, "Invalid number of bits");
return 0;
} else if (bits==16) use16bit = true;
} else if (!jsvIsUndefined(options)) {
jsExceptionHere(JSET_ERROR, "Expecting options to be undefined or an Object, not %t", options);
}
JsVar *arrayLength = jsvNewFromInteger(samples);
JsVarDataArrayBufferViewType bufferType = use16bit ? ARRAYBUFFERVIEW_UINT16 : ARRAYBUFFERVIEW_UINT8;
JsVar *arrayBuffer = jswrap_typedarray_constructor(bufferType, arrayLength, 0, 0);
JsVar *arrayBuffer2 = 0;
if (doubleBuffer) arrayBuffer2 = jswrap_typedarray_constructor(bufferType, arrayLength, 0, 0);
jsvUnLock(arrayLength);
JsVar *waveform = jspNewObject(0, "Waveform");
if (!waveform || !arrayBuffer || (doubleBuffer && !arrayBuffer2)) {
jsvUnLock(waveform);
jsvUnLock(arrayBuffer); // out of memory
jsvUnLock(arrayBuffer2);
return 0;
}
jsvUnLock(jsvObjectSetChild(waveform, "buffer", arrayBuffer));
if (arrayBuffer2) jsvUnLock(jsvObjectSetChild(waveform, "buffer2", arrayBuffer2));
return waveform;
}
/*JSON{
"type" : "method",
"class" : "ArrayBufferView",
"name" : "map",
"generate" : "jswrap_arraybufferview_map",
"params" : [
["function","JsVar","Function used to map one item to another"],
["thisArg","JsVar","if specified, the function is called with 'this' set to thisArg (optional)"]
],
"return" : ["JsVar","An array containing the results"],
"return_object" : "ArrayBufferView"
}
Return an array which is made from the following: ```A.map(function) = [function(A[0]), function(A[1]), ...]```
**Note:** This returns an ArrayBuffer of the same type it was called on. To get an Array, use `Array.prototype.map`
*/
JsVar *jswrap_arraybufferview_map(JsVar *parent, JsVar *funcVar, JsVar *thisVar) {
if (!jsvIsArrayBuffer(parent)) {
jsExceptionHere(JSET_ERROR, "ArrayBufferView.map can only be called on an ArrayBufferView");
return 0;
}
if (!jsvIsFunction(funcVar)) {
jsExceptionHere(JSET_ERROR, "ArrayBufferView.map's first argument should be a function");
return 0;
}
if (!jsvIsUndefined(thisVar) && !jsvIsObject(thisVar)) {
jsExceptionHere(JSET_ERROR, "ArrayBufferView.map's second argument should be undefined, or an object");
return 0;
}
// create ArrayBuffer result
JsVarDataArrayBufferViewType arrayBufferType = parent->varData.arraybuffer.type;
JsVar *arrayBufferLength = jsvNewFromInteger((JsVarInt)jsvGetArrayBufferLength(parent));
JsVar *array = jswrap_typedarray_constructor(arrayBufferType, arrayBufferLength, 0, 0);
jsvUnLock(arrayBufferLength);
if (!array) return 0;
// now iterate
JsvIterator it; // TODO: if we really are limited to ArrayBuffers, this could be an ArrayBufferIterator.
jsvIteratorNew(&it, parent);
JsvArrayBufferIterator itdst;
jsvArrayBufferIteratorNew(&itdst, array, 0);
while (jsvIteratorHasElement(&it)) {
JsVar *index = jsvIteratorGetKey(&it);
if (jsvIsInt(index)) {
JsVarInt idxValue = jsvGetInteger(index);
JsVar *args[3], *mapped;
args[0] = jsvIteratorGetValue(&it);
args[1] = jsvNewFromInteger(idxValue); // child is a variable name, create a new variable for the index
args[2] = parent;
mapped = jspeFunctionCall(funcVar, 0, thisVar, false, 3, args);
jsvUnLock(args[0]);
jsvUnLock(args[1]);
if (mapped) {
jsvArrayBufferIteratorSetValue(&itdst, mapped);
jsvUnLock(mapped);
}
}
jsvUnLock(index);
jsvIteratorNext(&it);
jsvArrayBufferIteratorNext(&itdst);
}
jsvIteratorFree(&it);
jsvArrayBufferIteratorFree(&itdst);
return array;
}
void bytePortInit(JsVar *parent,JsBytePort *bp){
int i,j,value;
uint32_t mask;
JsVar *buf = jswrap_typedarray_constructor(ARRAYBUFFERVIEW_UINT32, jsvNewFromInteger(256),0,0);
uint32_t *maskPnt = (uint32_t *)jswrap_espruino_getAddressOf(buf,true);
for(int i = 0; i < 256;i++){
mask = 0;
value = i;
for(j = 0; j < jswrap_byteport_pins; j++){
if((value & 1)>0) mask += bp->data.mask[j];
value = value>>1;
}
maskPnt[i] = mask;
}
jsvObjectSetChild(parent,"PortMask",buf);
jsvUnLock(buf);
}
