Function deliverCallbacks

modules/pins/i2s/audioout.c:1799–1841

#if PICO_BUILD || defined(__ets__) || ESP32 || defined(_WIN32)

void deliverCallbacks(void *the, void *refcon, uint8_t *message, uint16_t messageLength)
{
	modAudioOut out = refcon;

	xsBeginHost(out->the);
	xsmcVars(1);

	upUseCount(out);

	while (out->pendingCallbackCount) {
		xsIntegerValue id;
		xsIntegerValue stream;

		doLock(out);

		id = out->pendingCallbacks[0].id;
		stream = out->pendingCallbacks[0].stream;

		out->pendingCallbackCount -= 1;
		if (out->pendingCallbackCount)
			c_memmove(out->pendingCallbacks, out->pendingCallbacks + 1, out->pendingCallbackCount * sizeof(modAudioOutPendingCallbackRecord));

		doUnlock(out);

		xsmcSetInteger(xsVar(0), id);
		xsTry {
			xsmcGet(xsResult, out->obj, xsID_callbacks);
			if (xsUndefinedType != xsmcTypeOf(xsResult)) {
				xsmcGetIndex(xsResult, xsResult, stream);
				if (xsmcIsCallable(xsResult))
					xsCallFunction1(xsResult, out->obj, xsVar(0));
			}
			else
				xsCall1(out->obj, xsID_callback, xsVar(0));
		}
		xsCatch {
		}
	}

	xsEndHost(out->the);

	downUseCount(out);
}

// note: queueCallback relies on caller to lock mutex
void queueCallback(modAudioOut out, xsIntegerValue id, xsIntegerValue stream)