mirror of
https://github.com/lvgl/lvgl.git
synced 2025-01-28 07:03:00 +08:00
df0d36f02a
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com> Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
28 lines
1.4 KiB
Markdown
28 lines
1.4 KiB
Markdown
# Music player demo
|
|
|
|
## Overview
|
|
The music player demo shows what kind of modern, smartphone-like user interfaces can be created on LVGL. It works the best with display with 480x272 or 272x480 resolution.
|
|
|
|
|
|
|
|
|
|
## Run the demo
|
|
- In `lv_conf.h` or equivalent places set `LV_USE_DEMO_MUSIC 1`
|
|
- With `LV_DEMO_MUSIC_AUTO_PLAY` enabled a ~60 sec demo will be played.
|
|
- After `lv_init()` and initializing the drivers call `lv_demo_music()`
|
|
|
|
## How the spectrum animation works
|
|
- `assets/spectrum.py` creates an array of spectrum values from a music. 4 band are created with 33 samples/sec: bass, bass-mid, mid, mid-treble.
|
|
- The spectrum meter UI does the following:
|
|
- Zoom the album cover proportionality to the current bass value
|
|
- Display the 4 bands on the left side of a circle by default at 0°, 45°, 90°, 135°
|
|
- Add extra bars next to the "main bars" with a cosine shape. Add more bars for the lower bands.
|
|
- If there is a large enough bass, add a random offset to the position of the bars. E.g. start from 63° instead of 0°. (bars greater than 180° start again from 0°)
|
|
- If there is no bass, add 1 to the offset of the bars (it creates a "walking" effect)
|
|
- Mirror the bars to the right side of the circle
|
|
|
|
## Using spectrum.py
|
|
- install `librosa` with `pip3 install librosa`
|
|
- run `python spectrum.py my_file.mp3`
|
|
- see the result in `spectrum.h`
|