Added text and license notes

Author: bitluni

I2SCamera.cpp

@@ -1,3 +1,8 @@
+//parts of his code are taken from
+//https://github.com/igrr/esp32-cam-demo
+//by Ivan Grokhotkov
+//released under Apache License 2.0
+
 #include "I2SCamera.h"
 #include "Log.h"
 

I2SCamera.h

@@ -1,3 +1,8 @@
+//parts of his code are taken from
+//https://github.com/igrr/esp32-cam-demo
+//by Ivan Grokhotkov
+//released under Apache License 2.0
+
 #pragma once
 
 #include "soc/soc.h"

README.md

@@ -1 +1,17 @@
-# ESP32_DMA_Camera
+# ESP32 I2S Camera
+
+This project shows how to record images with the ESP32 and the OV7670 camera without FIFO. An SPI TFT display is supported and a basic web server provides the images in the local network.
+
+The video explaining this code can be found here
+https://youtu.be/S2yTQHM82jc
+
+Also check out the project page for some details, parts and datasheets
+http://bitluni.net/esp32-i2s-camera-ov7670/
+
+# Acknowledgements
+The project is based on the esp-cam-demo of Ivan Grokhotkov
+https://github.com/igrr/esp32-cam-demo
+
+#License
+Since parts of the code are taken from the esp-cam-demo which are subject to the Apache License 2.0 license.
+The rest of the code is Public Domain

XClk.cpp

@@ -1,3 +1,8 @@
+//parts of his code are taken from
+//https://github.com/igrr/esp32-cam-demo
+//by Ivan Grokhotkov
+//released under Apache License 2.0
+
 #include "XClk.h"
 #include "driver/ledc.h"