Play animated GIF to end of file

Louis · November 18, 2020, 8:08pm

Hi, it’s not implemented in the GifDecoder library yet, but could be. I’m nearly finished adapting the GifDecoder library to use the external AnimatedGIF library to do the decoding, and the AnimatedGIF library supports playing back a GIF that’s stored in memory.

The changes are made in this branch, but I’ll merge it in to the main branch and do a release soon:

This example from AnimatedGIF doesn’t use SmartMatrix Library, but you could probably adapt it to SmartMatrix easily enough:

github.com

bitbank2/AnimatedGIF/blob/master/examples/ESP32_LEDMatrix_I2S/ESP32_LEDMatrix_I2S.ino

// ESP32_LEDMatrix_I2S
//
// Example sketch which shows how to display a 64x64
// animated GIF image stored in FLASH memory
// on a 64x64 LED matrix

// Written for the I2S DMA Matrix Library for the ESP32
// https://github.com/mrfaptastic/ESP32-HUB75-MatrixPanel-I2S-DMA

// To display a GIF from memory, a single callback function
// must be provided - GIFDRAW
// This function is called after each scan line is decoded
// and is passed the 8-bit pixels, RGB565 palette and info
// about how and where to display the line. The palette entries
// can be in little-endian or big-endian order; this is specified
// in the begin() method.
//
// The AnimatedGIF class doesn't allocate or free any memory, but the
// instance data occupies about 22.5K of RAM.
//

This file has been truncated. show original

There’s also the option of using the SPIFFS to store a GIF file. I’m not that familiar with that option. Someone adapted the AnimatedGIFs sketch (which is the basis of the GifDecoder Library) to use SPIFFS, so you might want to refer to their code and try to get that working with GifDecoder.

Feel free to post back and get some help on either path. I’m interested in supporting both options but don’t have a lot of time right now to work on it.