pixelmatix / gifdecoder Goto Github PK

More details here: pixelmatix/AnimatedGIFs#26

pixelmatix/SmartMatrix#69

I think this shows how to allocate the block needed for AnimatedGIF with malloc (after allocating mymemorypool with malloc):

bitbank2/AnimatedGIF#8 (comment)

https://github.com/bitbank2/AnimatedGIF/releases/tag/1.2.0

I'm trying to compile the code for AnimatedGifs from SmartMatrix and I have downloaded all the libraries I need, when I went to compile it gave me this error message

C:\Users\Ricky\Desktop\Arduino\libraries\GifDecodermaster\src/GifDecoder_Impl.h: In member function 'int GifDecoder<maxGifWidth, maxGifHeight, lzwMaxBits, useMalloc>::startDecoding(uint8_t*, int)':

C:\Users\Ricky\Desktop\Arduino\libraries\GifDecodermaster\src/GifDecoder_Impl.h:323:16: error: 'BIG_ENDIAN_PIXELS' was not declared in this scope

 gif->begin(BIG_ENDIAN_PIXELS, GIF_PALETTE_RGB888);

            ^

Error compiling for board Teensy 3.5.

The error comes from the file GifDecoder_Impl.h and I don't know how to fix it

A few weeks after I did the first release of GifDecoder, the AnimatedGIF Library was released and it looks to be a much more efficient GIF decoder, and with an active developer making improvements and fixing bugs. I was planning to switch my code using the old AnimatedGIFs sketch or GifDecoder library over to AnimatedGIF, but I think there's still room for a GIF library with a more beginner friendly API. AnimatedGIF requires the sketch to include some callback functions that are a little complex, e.g. the GIF disposal methods are implemented in the user's sketch, not in the library.

I updated GifDecoder to act as a wrapper for AnimatedGIF, keeping the API nearly the same and adding any complex code like handling the GIF disposal methods inside the GifDecoder class. I didn't implement support for 16-bit color palettes or the DrawPixelRow() callback that's needed for the Arcada GifDecoder as some thought needs to go into how to tell GifDecoder to choose between 24-bit and 16-bit palettes (previously it was hardcoded with a #define).

I have a branch with these changes, and the SmartMatrixGifPlayer example is running:

https://github.com/pixelmatix/GifDecoder/tree/AGifLibrary

AnimatedGIF library can support 16-bit palettes, which is more efficient than converting 24-bit colors to 16-bit each time the pixel is drawn. Some thought needs to go into how to support this

I'm trying to load a GIF file from an SD card on a Teensy 4.1 and display it on a SMARTMATRIX_HUB75_16ROW_MOD8SCAN 448x16 matrix.
I'm using an AnimatedGifsTest example. I tried two configurations:

kRefreshDepth = 36;
kDmaBufferRows = 4;
matrix.setRefreshRate(90);

and

kRefreshDepth = 12;
kDmaBufferRows = 2;
matrix.setRefreshRate(30);

Both produced the same results. Here's the serial output:

Starting AnimatedGIFs Sketch
1:1.gif    size:2105
2:1.2.gif    size:2137
3:1.1.gif    size:2126
4:2.gif    size:2139
Pathname: /gifs/1.gif
Successfully opened GIF; Canvas size = 319 x 16
Pathname: /gifs/1.2.gif
open failed: 2
Pathname: /gifs/1.2.gif
open failed: 2

1.gif has a size of 319x16
1.2.gif has a size of 320x16
Is there anything i could do to load a larger GIF?