[FEATURE REQUEST] Play n times

[n0kovo]

Hi! Very cool project!

It would be nice to be able to be able to stop the player after n plays (or frames?).

Or maybe have the program read the number of loops from the file data if it exists.
(Random Scala code (should give an idea) reading loop count bytes. Found here):

  val raf = new RandomAccessFile(src, "rw")
  // skip GIF header, 6 bytes. Don't care of it much.
  raf.skipBytes(6)
  // don't need image dimension
  raf.skipBytes(4)
  val flags = raf.readUnsignedByte()
  val headerSize = 3 * (1 << ((flags & 7) + 1)) // 00000111 - size of color table
  val headerExists = flags & 128 // 10000000 - is there a color table at all
  // skip background color and pixel ratio
  raf.skipBytes(2)
  if (headerExists != 0) {
    raf.skipBytes(headerSize)
  }
  val signature = raf.readUnsignedShort()
  require(signature == 0x21ff)
  raf.skipBytes(13) // NETSCAPE 2.0
  raf.skipBytes(1) // GIF animation flag has to be 1
  ctx.loopCount.foreach {
    v =>
      raf.writeByte(v & 0xff)
      raf.writeByte((v >> 8) & 0xff)
  }
  raf.close()

Turns out it's pretty hard finding information on parsing GIF data 🤔

I might have a go (lol) at this, at some point.