spradio-liquidsoap/spradio.liq

%include "secrets.liq"

set("log.file", true)
set("log.file.path", "/home/liquidsoap/spradio.log")
set("log.stdout", true)
set("log.level", 4)

set("server.telnet", false)

set("scheduler.generic_queues", 5)
set("scheduler.fast_queues", 3)
set("scheduler.non_blocking_queues", 3)

set("audio.converter.samplerate.libsamplerate.quality", "best")

security = single(id="default", fallback_audio)

# Tweaked custom crossfade to deal with jingles..
def smart_cross(~start_next=5.,~fade_in=3.,~fade_out=3.,
                ~default=(fun (a,b) -> sequence([a, b])),
                ~high=-15., ~medium=-32., ~margin=4.,
                ~width=2.,~conservative=false,s)
    fade.out = fade.out(type="sin", duration=fade_out)
    fade.in  = fade.in(type="sin", duration=fade_in)
    add = fun (a,b) -> add(normalize=false, [b, a])
    log = log(label="smart_cross")

    def transition(a,b,ma,mb,sa,sb)
        list.iter(fun(x)-> log(level=4, "Before: #{x}"), ma)
        list.iter(fun(x)-> log(level=4, "After : #{x}"), mb)

        if ma["type"] == "J" or mb["type"] == "J" then
            log("Old or new file is a jingle: sequenced transition.")
            sequence([sa, sb])
        elsif
            # Do not fade if it's already very low.
            b >= a + margin and a <= medium and b <= high
        then
            log("new >= old + margin, old <= medium and new <= high.")
            log("Do not fade if it's already very low.")
            log("Transition: crossed, no fade.")
            add(sa, sb)

            # What to do with a loud end and a quiet beginning ?
            # A good idea is to use a jingle to separate the two tracks,
            # but that's another story.
        else
            # Otherwise, A and B are just too loud to overlap nicely,
            # or the difference between them is too large and overlapping would
            # completely mask one of them.
            # log("No transition: using default.")
            # default(sa, sb)
            log("Transition: crossed, fade-in, fade-out.")
            add(fade.out(sa), fade.in(sb))
        end
    end

    cross(width=width, duration=start_next,
          conservative=conservative, transition,s)
end

def get_http_data(headers, url) =
    if string.contains(prefix='https', url) then
        let (status, _, data) = https.get(headers=headers, url)
        let (_, status_code, _) = status
        (status_code, data)
    else
        let (status, _, data) = http.get(headers=headers, url)
        let (_, status_code, _) = status
        (status_code, data)
    end
end

def post_http_data(headers, postdata, url) =
    if string.contains(prefix='https', url) then
        let (status, _, data) = https.post(headers=headers, data=postdata, url)
        let (_, status_code, _) = status
        (status_code, data)
    else
        let (status, _, data) = http.post(headers=headers, data=postdata, url)
        let (_, status_code, _) = status
        (status_code, data)
    end
end

def next_song() =
    log = log(label="next_song")

    log("Requesting the next song from #{url_next}")
    let (status_code, data) = get_http_data(api_headers_next, url_next)

    log(data)

    if status_code == 200 then
        request.create(data)
    else
        request.create(fallback_annotate)
    end
end

def change_meta(m) =
    log = log(label="change_meta")

    artist = m["artist"]
    game = m["game"]
    title = m["title"]

    log("Request ID: "^string.quote(m["req_id"]))
    log("Artist: #{artist} -- Game: #{game} -- Title: #{title}")

    [("artist","#{artist}"),
    ("title","#{title} [#{game}]"),
    ("req_id",m["req_id"]),
    ("type",m["type"]),
    ("game",m["game"]),
    ("replay_gain",m["replay_gain"])]
end

def just_played(m) =
    log = log(label="just_played")

    if m["req_id"] != "" then
        log('Letting server know we played request ID #{m["req_id"]} here: #{url_played}')
        played_song = json_of(compact=true, [("song_request", int_of_string(m["req_id"]))])
        let (status_code, data) = post_http_data(api_headers_played, played_song, url_played)

        if status_code == 204 then
            log('Successfully reported that the song was played.')
        else
            log('Error while reporting the song was played: #{data}')
        end
    else
        log("No request ID! Stream just started or there are other problems.")
    end
end

radio = request.dynamic(id="main", default_duration=120., length=60., next_song)
radio = fallback(track_sensitive=false, [radio, security])
radio = map_metadata(update=false, change_meta, radio)
radio = on_metadata(id="main", just_played, radio)
radio = amplify(1., override="replay_gain", radio)
radio = smart_cross(radio)

output.icecast(%mp3,
    encoding="UTF-8", protocol="http",
    name=radio_name, description=radio_description, genre=radio_genre, url=radio_url_main,
    host=stream_address, port=stream_port, password=stream_password, mount="stream128.mp3",
    radio)
output.icecast(%vorbis(samplerate=44100, channels=2, quality=0.4),
    encoding="UTF-8", protocol="http",
    name=radio_name, description=radio_description, genre=radio_genre, url=radio_url_main,
    host=stream_address, port=stream_port, password=stream_password, mount="stream128.ogg",
    radio)
output.icecast(%vorbis(samplerate=44100, channels=2, quality=0.0),
    encoding="UTF-8", protocol="http",
    name=radio_name, description=radio_description, genre=radio_genre, url=radio_url_main,
    host=stream_address, port=stream_port, password=stream_password, mount="stream64.ogg",
    radio)