68 lines
2.3 KiB
Bash
Executable file
68 lines
2.3 KiB
Bash
Executable file
#!/bin/sh
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export LC_ALL=C
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export LANG=C
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export DESKTOP_WIDTH='1600'
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export TTY_WIDTH=$(( $(stty size | cut -d' ' -f2) - 1))
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export TTY_HEIGHT=$(( $(stty size | cut -d' ' -f1) - 1))
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# Hiptext uses a row to represent twice as much as a column in order
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# to more faithfully project the aspect ratio of the image/video.
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ratio=$(echo "scale=5; $TTY_HEIGHT * 2 / $TTY_WIDTH" | bc)
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height_float=$(echo "scale=5; $ratio*$DESKTOP_WIDTH" | bc)
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export DESKTOP_HEIGHT=$(printf "%.0f\n" "$height_float")
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export DISPLAY=:0
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DESKTOP_RES="$DESKTOP_WIDTH"x"$DESKTOP_HEIGHT"
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UDP_URI='udp://127.0.0.1:1234'
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# Create an X desktop in memory without actually displaying it on a real screen.
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# Double the width to make room for the xzoom window, which is actually what
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# ffmpeg will stream;
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# ---------------------------------
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# | | |
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# | desktop | xzoom win |
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# | here | here mirrors |
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# | | desktop |
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# | | |
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# ---------------------------------
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# So xzoom mirrors the desktop and ffmpeg streams the xzoom window.
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Xvfb :0 -screen 0 "$(($DESKTOP_WIDTH * 2))"x"$DESKTOP_HEIGHT"x16 > ./logs/xvfb.log 2>&1 &
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# TODO: detect X start rather than sleep
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sleep 1
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/usr/bin/firefox >> ./logs/xvfb.log 2>&1 &
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# Convert the X framebuffer desktop into a video stream, but only stream the
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# right hand side where the xzoom window is.
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# TODO: Can latency be reduced further? Can flicker be reduced, in order to reduce bandwidth?
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ffmpeg \
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-f x11grab \
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-s $DESKTOP_RES \
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-r 12 \
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-i :0.0+$DESKTOP_WIDTH \
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-vcodec mpeg2video \
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-f mpegts \
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$UDP_URI \
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> ./logs/ffmpeg.log 2>&1 &
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# The above ffmpeg can take a while to open the UDP stream, so wait a little
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# TODO: detect the stream's presence rather than sleep
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sleep 1
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# Intercept STDIN (mouse and keypresses) and forward to the X framebuffer via xdotool
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(./interfacer/interfacer <&3 > ./logs/interfacer.log 2>&1 &) 3<&0
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# Hiptext renders images and videos into text characters displayable in a terminal.
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# It complains unless you specify the exact path to the font, seems like a bug to me.
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# TODO: support dynamic sizing
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hiptext \
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-font /usr/share/fonts/ttf-dejavu/DejaVuSansMono.ttf \
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-bgprint=true \
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$UDP_URI \
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2> ./logs/hiptext.log
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# Kill all the subprocesses created in this script if the script itself exits
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trap "trap - SIGTERM && kill -- -$$" SIGINT SIGTERM EXIT
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