## Description
Issue 943 where trickplay images were misaligned with seek preview
mages. I made a post in issues but figured i'd go ahead and make the
pull request.
per gemini:
In SeekPreviewImage.kt, the code calculates which tile in the grid to
display based on the current timestamp:
val x = (tileIndex % trickPlayInfo.tileWidth) // x position within tile
grid
val y = (tileIndex / trickPlayInfo.tileHeight) // y position <-- BUG IS
HERE
To find the correct row (y) in a grid, you are supposed to divide the
current index by the width of the row (the number of columns), not the
height.
Why this breaks: Let's assume a standard trickplay grid that is 10
images wide (tileWidth = 10) and 5 images tall (tileHeight = 5).
If you are looking at the 12th image (tileIndex = 11), it should be on
Row 1 (the second row).
The code calculates y = 11 / 5 = 2. It skips to Row 2!
Because it divides by the smaller height value, the y coordinate
increases much faster than it should. This causes the preview to
visually "jump" down to future rows prematurely, and then snap back as
the x coordinate resets, causing the exact "flashing back and forth" you
saw with the credits and intros.
### Related issue
Fixes#943
### Testing
Tested in Android TV (Android 9) and it does indeed display proper seek
previews using trickplay images.
## AI or LLM usage
Gemini Pro was used to find and fix this bug.
5050b087e1