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--[[
Copyright © 2010 VideoLAN and AUTHORS
Authors: Julien 'Lta' BALLET <contact at lta dot io>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
--]]
local config = {}
config["base_url"] = "http://api.icast.io"
config["api_base_url"] = config.base_url.."/1"
local json = nil
local roots = nil
function json_init()
if json ~= nil then return false end
vlc.msg.dbg("JSON parser lazy initialization")
json = require ("dkjson")
-- Use vlc.stream to grab a remote json file, place it in a string,
-- decode it and return the decoded data.
json["parse_url"] = function(url)
local stream = vlc.stream(url)
local string = ""
local line = ""
repeat
line = stream:readline()
string = string..line
until line ~= nil
--print(string)
return json.decode(string)
end
end
-- VLC SD mandatory method, return the name and capabilities of this SD.
function descriptor()
return { title = "iCast Stream Directory", capabilities = {"search"} }
end
-- Utility function to replace nils by an empty string, borrowed from icecast.lua
function dropnil(s)
if s == nil then return "" else return s end
end
function roots_init()
if roots ~= nil then return nil end
roots = {
locals = vlc.sd.add_node({title="Local Streams"}),
cats = vlc.sd.add_node({title="Categories"}),
search = nil
}
end
-- Add this station to the discovered service list.
function station_add(node, station)
if station.streams == nil or station.streams[1] == nil then
return nil
end
item = node:add_subitem({
title = station.name,
path = station.streams[1]["uri"],
meta = {
["Listing Source"] = "icast.io",
["Listing Type"] = "radio",
["Icecast Bitrate"] = dropnil(station.streams[1].bitrate)
}
})
if station.slogan then
item:set_name(station.name..": "..station.slogan)
end
if station.genre_list then
item:set_genre(table.concat(station.genre_list, ", "))
end
if station.language then
item:set_language(station.language)
end
if station.logo.medium then
item:set_arturl(config.base_url..station.logo.medium)
end
end
-- Get an url to iCast's API, parse the returned stations and add them
-- to the list of discovered medias.
function stations_fetch(node, url)
json_init()
vlc.msg.info("Fetching stations from API ("..url..")")
local result = json.parse_url(config.api_base_url..url)
if result.stations == nil then
return nil
end
for _, station in ipairs(result.stations) do
station_add(node, station)
end
end
-- VLC SD API - Search entry point
function search(query)
if roots.search then vlc.sd.remove_node(roots.search) end
roots.search = vlc.sd.add_node({title="Search Results"})
stations_fetch(roots.search, "/stations/search.json?q="..query.."*")
end
-- VLC SD API - Main listing entry point
function main()
roots_init()
stations_fetch(roots.locals, "/stations/local.json")
vlc.msg.dbg("Fetching list of genre from API (/genres.json)")
local result = json.parse_url(config.api_base_url.."/genres.json")
for genre, sub_genres in pairs(result.genres) do
local node = roots.cats:add_subnode({title=genre})
for _, sub_genre in ipairs(sub_genres) do
local sub_node = node:add_subnode({title=sub_genre})
stations_fetch(sub_node, "/stations/genre/"..sub_genre..".json")
end
end
end
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