api/test/liquidsoap.liq

#!/usr/bin/env liquidsoap

set("log.file.path","/home/kyle/.lsl.txt")
set("log.stdout",true)
set("harbor.bind_addrs", ["127.0.0.1"])

# Buffer and timing settings
set("frame.duration",0.02)
set("root.max_latency",2.)
set("audio.converter.samplerate.libsamplerate.quality","best")
set("clock.allow_streaming_errors",false)


# Get next track dynamically [Each station]

def get_next_main() =
  uri = list.hd(default="", process.read.lines("uv run get_next_track.py main"))
  [request.create(uri)]
end

def get_next_rock() =
  uri = list.hd(default="", process.read.lines("uv run get_next_track.py rock"))
  [request.create(uri)]
end

def get_next_electronic() =
  uri = list.hd(default="", process.read.lines("uv run get_next_track.py electronic"))
  [request.create(uri)]
end

def get_next_rap() =
  uri = list.hd(default="", process.read.lines("uv run get_next_track.py rap"))
  [request.create(uri)]
end

#def get_next_classical() =
#  uri = list.hd(default="", process.read.lines("uv run get_next_track.py classical"))
#  [request.create(uri)]
#end

def get_next_pop() =
  uri = list.hd(default="", process.read.lines("uv run get_next_track.py pop"))
  [request.create(uri)]
end


# Set up queues [Each station]

main_list = request.dynamic(
  id="requests",
  get_next_main,
  retry_delay=1.0,
  timeout=20.0
)


rock_list = request.dynamic(
  id="rock_requests",
  get_next_rock,
  retry_delay=1.0,
  timeout=20.0
)

electronic_list = request.dynamic(
  id="electronic_requests",
  get_next_electronic,
  retry_delay=1.0,
  timeout=20.0
)

rap_list = request.dynamic(
  id="rap_requests",
  get_next_rap,
  retry_delay=1.0,
  timeout=20.0
)

#classical_list = request.dynamic.list(
#  id="classical_requests",
#  get_next_classical,
#  prefetch=0
#)

pop_list = request.dynamic(
  id="pop_requests",
  get_next_pop,
  retry_delay=1.0,
  timeout=20.0
)


# Standard

silence = single("/home/kyle/ls/silence.ogg")

# Queue [Each station]

def main_queue(remaining, _) =
  log("MAIN: Queueing with #{remaining} seconds remaining")
  if not main_list.fetch() then
    log("Fetching next query failed")
  end
end

def rock_queue(remaining, _) =
  log("ROCK: Queueing with #{remaining} seconds remaining")
  if not rock_list.fetch() then
    log("Fetching next query failed")
  end
end  

def electronic_queue(remaining, _) =
  log("ELECTRONIC: Queueing with #{remaining} seconds remaining")
  if not electronic_list.fetch() then
    log("Fetching next query failed")
  end
end

def rap_queue(remaining, _) =
  log("RAP: Queueing with #{remaining} seconds remaining")
  if not rap_list.fetch() then
    log("Fetching next query failed")
  end
end

#def classical_queue(remaining, _) =
#  log("CLASSICAL: Queueing with #{remaining} seconds remaining")
#  if not classical_list.fetch() then
#    log("Fetching next query failed")
#  end
#end

def pop_queue(remaining, _) =
  log("POP: Queueing with #{remaining} seconds remaining")
  if not pop_list.fetch() then
    log("Fetching next query failed")
  end
end



# Initial fetch [Each station]

main_list.fetch()
rock_list.fetch()
electronic_list.fetch()
rap_list.fetch()
#classical_list.fetch()
pop_list.fetch()

# Source setup [Each station]

def create_source(s,q) =
  source.dynamic(s, track_sensitive=true, {q()})
end

main_source = create_source(main_list, main_queue)
rock_source = create_source(rock_list, rock_queue)
electronic_source = create_source(electronic_list, electronic_queue)
rap_source = create_source(rap_list, rap_queue)
#classical_source = create_source(classical_list, classical_queue)
pop_source = create_source(pop_list, pop_queue)

all_tracks_main = fallback(track_sensitive=false, [main_source, silence])
all_tracks_rock = fallback(track_sensitive=false, [rock_source, silence])
all_tracks_electronic = fallback(track_sensitive=false, [electronic_source, silence])
all_tracks_rap = fallback(track_sensitive=false, [rap_source, silence])
#all_tracks_classical = fallback(track_sensitive=false, [classical_source, silence])
all_tracks_pop = fallback(track_sensitive=false, [pop_source, silence])

# HLS Setup [Standard]

aac_lofi = %ffmpeg(format="mpegts",
                  %audio(codec="aac",
                        channels=2,
                        ar=48000,
                        b="128k"))

aac_midfi = %ffmpeg(format="mpegts",
                   %audio(codec="aac",
                         channels=2,
                         ar=48000,
                         b="256k"))

aac_hifi = %ffmpeg(format="mpegts",
                  %audio(codec="aac",
                        channels=2,
                        ar=48000,
                        b="512k"))


streams =
  [("aac_lofi", aac_lofi), ("aac_midfi", aac_midfi), ("aac_hifi", aac_hifi)]


# HLS Outputs [Each station]

def create_hls_output(~name, source) =
  output.file.hls(
    playlist="#{name}.m3u8",
    segment_duration=0.5,
    segments=10,
    segments_overhead=5,
    persist_at="/nvme/pub/hls/#{name}/state.config",
    "/nvme/pub/hls/#{name}",
    streams,
    source
  )
end

create_hls_output(name="main", mksafe(main_source))

create_hls_output(name="rock", mksafe(rock_source))
create_hls_output(name="electronic", mksafe(electronic_source))
create_hls_output(name="rap", mksafe(rap_source))

#output.file.hls(
#  playlist="classical.m3u8",
#  segment_duration=0.45,
#  segments=9,
#  segments_overhead=3,
#  persist_at="/nvme/pub/hls/classical_state.config",
#  "/nvme/pub/hls/classical",
#  streams,
#  mksafe(classical_source)
#)

create_hls_output(name="pop", mksafe(pop_source))

# HTTP Server

def get_next_http(~protocol,~data,~headers,uri) =
  source = 
    if data == "main" then main_source
    elsif data == "rock" then rock_source
    elsif data == "electronic" then electronic_source
    elsif data == "rap" then rap_source
    elsif data == "pop" then pop_source
    else null() end
  
  if source != null() then
    source.skip(source)
  http.response(
    protocol=protocol,
    code=200,
    data="OK #{data}"
  )
end

harbor.http.register(port=29000, method="POST", "/next", get_next_http)

# EOF