zhang9302002 / xv6-riscv-image-video-player

xv6-riscv JPEG/WAV/MP4 player

This project contains multimedia players:

• viewer *.jpeg
• playwav *.wav
• playmp4 *.rgb

This project is based on:

• https://pdos.csail.mit.edu/6.828/2021/index.html
• https://github.com/keshavgupta21/xv6-vga/tree/xv6-riscv-fall19
• http://svn.emphy.de/nanojpeg/trunk
• https://github.com/zhaoyuhang/THSS14-XV6/tree/b3591cd7a69f4725ebf1964888ce86d447135f22/xv6

Environment Setup

• Install QEMU 5.1+, riscv-tools: https://pdos.csail.mit.edu/6.828/2021/tools.html
• Install VNC Viewer to display JPEG pictures: https://www.realvnc.com/en/connect/download/viewer
• Install ffmpeg to convert MP4 to rgb+wav: http://ffmpeg.org/download.html
• Download this project or Fork it: https://github.com/zhang9302002/xv6-riscv
• We test the project on macOS Monterey 12.0.1, and everything goes well

User Guideline

• to start xv6-riscv64 make qemu
• to display jpeg

    make qemu 
    viewer hutao.jpeg

• to move the picture

    ctrl+z, W/A/S/D

• to zoom in / out

    ctrl+z, O/P

• to play wav:

    make qemu
    playwav test.wav

• to play mp4:

    ffmpeg -i a.mp4 -r 10.5 -s 320x200 -pix_fmt rgb565le a.rgb
    ffmpeg -i a.mp4 -acodec pcm_s161e -ac 2 -ar 22050 a.wav
    make qemu
    playmp4 a.rgb

Note

• The RAM of xv6 is limited to 128MB, so mp4 video larger than 30s is not supported.

• When you add new files(jpeg, wav or rgb) to xv6, you must change Makefile, L180-181 like this:

  fs.img: mkfs/mkfs *.jpeg *.wav *.rgb user/xargstest.sh <newfile> $(UPROGS)

  mkfs/mkfs fs.img *.jpeg *.wav *.rgb user/xargstest.sh <newfile> $(UPROGS)