#!/bin/bash
set -e

if [ "$#" -lt 1 ]; then
  echo "Usage: $0 <video_file> [FM_freq]"
  exit 1
fi

VIDEO_FILE="$1"
FM_FREQ="${2:-71.75}"
AUDIO_FILE="/tmp/$(basename "${VIDEO_FILE%.*}").wav"

# Pre-extract the audio stream if it doesn't exist already
if [ ! -f "$AUDIO_FILE" ]; then
  echo "Extracting audio to $AUDIO_FILE..."
  ffmpeg -i "$VIDEO_FILE" -vn -acodec pcm_s16le -ar 22050 -ac 1 "$AUDIO_FILE"
fi


# Start video playback concurrently
echo "Starting omxplayer playback..."
omxplayer -n -1 --loop --display=2 "$VIDEO_FILE" &
OMX_PID=$!
sleep 1.3


# Start pifmrds using the pre-extracted audio
echo "Starting FM transmission on $FM_FREQ MHz..."
sudo ~/rpitx-ui/pifmrds -freq "$FM_FREQ" -audio  "$AUDIO_FILE" &
PIFMRDS_PID=$!


cleanup() {
  kill $PIFMRDS_PID $OMX_PID 2>/dev/null
  stty sane
  exit
}
trap cleanup SIGINT SIGTERM

wait