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local ZDFmediathek = {} -- Utility functions unique to this script.
-- Identify the script.
function ident(self)
package.path = self.script_dir .. '/?.lua'
local B = require 'quvi/bit'
local C = require 'quvi/const'
local U = require 'quvi/util'
local r = {}
r.domain = "zdf%.de"
r.formats = "default|best"
r.categories = B.bit_or(C.proto_http, C.proto_rtsp)
r.handles = U.handles(self.page_url, {r.domain}, {"/ZDFmediathek/"})
return r
end
-- Query available formats.
function query_formats(self)
local c = ZDFmediathek.get_config(self)
local fmts = ZDFmediathek.iter_formats(c)
local r = {}
table.sort(fmts, ZDFmediathek.compare_format)
for _,f in pairs(fmts) do
table.insert(r, ZDFmediathek.to_s(f))
end
self.formats = table.concat(r, "|")
return self
end
-- Parse media URL.
function parse(self)
local U = require 'quvi/util'
local c = ZDFmediathek.get_config(self)
local fmts = ZDFmediathek.iter_formats(c)
local f = U.choose_format(self, fmts,
ZDFmediathek.choose_best,
ZDFmediathek.choose_default,
ZDFmediathek.to_s)
or error("unable to match format")
self.url = { f.url or error("no match: media URL") }
return self
end
function ZDFmediathek.merge_format(fmt1, fmt2)
local t = {}
for k,v in pairs(fmt1) do t[k] = v end
for k,v in pairs(fmt2) do t[k] = v end
return t
end
function ZDFmediathek.table_add_format(t, fmt)
-- Only accessible with HBBTV user agent, lets drop it
-- FIXME: store facets in fmt and match for <facet>hbbtv</facet>?
if fmt.url:match('http://www.metafilegenerator.de/') then
return
end
table.insert(t, fmt)
-- Some URLs/Formats are not explicitly listed but can be derived:
-- The "high"-quality f4m file may contain a reference to a file that is
-- of better quality than "veryhigh" classified http streams.
-- Example: 2256k instead of 1496k
if fmt.quality == "high" and fmt.type == "h264_aac_f4f_http_f4m_http" then
local new = { type = "h264_aac_mp4_http_na_na", container = "mp4" }
new.url = ZDFmediathek.http_mp4_from_f4m(fmt.url)
if new.url then
table.insert(t, ZDFmediathek.merge_format(fmt, new))
end
end
if fmt.quality == "hd" and fmt.type == "h264_aac_mp4_rtmp_zdfmeta_http" then
local new = { type = "h264_aac_mp4_http_na_na", container = "mp4",
protocol = "http" }
new.url = ZDFmediathek.http_mp4_from_zdfmeta(fmt.url)
if new.url then
table.insert(t, ZDFmediathek.merge_format(fmt, new))
end
end
return
end
function ZDFmediathek.iter_formats(c)
local p = {
'<formitaet basetype="(.-_.-_(.-)_(.-)_.-)".->',
'<quality>(.-)</quality>',
'<url>(.-)</url>',
'(.-)',
'</formitaet>'
}
local t = {}
for type,container,protocol,quality,url,data in
c:gmatch(table.concat(p, '%s*')) do
f = { type = type, container = container, protocol = protocol,
quality = quality, url = url }
-- width and height are not available for live streams -> may be nil
f.width = tonumber(data:match("<width>(.-)</width>"))
f.height = tonumber(data:match("<height>(.-)</height>"))
ZDFmediathek.table_add_format(t, f)
end
return t
end
function ZDFmediathek.get_config(self)
local U = require 'quvi/util'
self.host_id = "zdfmediathek"
self.id = self.page_url:match('/ZDFmediathek/#?/?beitrag/video/(%d+)') or
self.page_url:match('/ZDFmediathek/#?/?beitrag/live/(%d+)')
or error ("no match: media id")
local xml = { "http://www.zdf.de/",
"ZDFmediathek/xmlservice/web/beitragsDetails?id=", self.id }
local c = quvi.fetch(table.concat(xml), {fetch_type='config'})
if not(c:match('<statuscode>ok</statuscode>')) then
error(table.concat({'error:', U.xml_get(c, 'statuscode', false), '-',
U.xml_get(c, 'debuginfo', false)}, ' '))
end
self.title = U.xml_get(c, 'title', false)
self.thumbnail_url =
c:match('<teaserimage alt=".-" key="946x532">([^<]+)</teaserimage>')
-- Quirks for broken stream descriptors
if U.xml_get(c, 'type', false) == "livevideo" then
-- The server returns 403 without ?hdcore
c = c:gsub('manifest%.f4m</url>', 'manifest.f4m?hdcore</url>')
-- Fix incorrect basetype
c = c:gsub('h264_aac_na_rtsp_mov_http', 'h264_aac_3gp_rtsp_na_na')
end
return c
end
function ZDFmediathek.http_mp4_from_zdfmeta(meta_url)
local c = quvi.fetch(meta_url, {fetch_type='config'})
local path = c:match("mp4:(.-%.mp4)")
return path and "http://nrodl.zdf.de/none/" .. path or nil
end
function ZDFmediathek.http_mp4_from_f4m(f4m_url)
local c = quvi.fetch(f4m_url, {fetch_type='config'})
local p = '<media href="(.-)/manifest%.f4m%?hdcore" bitrate="(%d+)"/>'
local max_bitrate = 0
local path = nil
for _path, bitrate in c:gmatch(p) do
if tonumber(bitrate) > max_bitrate then
max_bitrate = tonumber(bitrate)
path = _path
end
end
return path and "http://nrodl.zdf.de/none/" .. path or nil
end
function ZDFmediathek.rank_type(f)
local rank = {
h264_aac_mp4_http_na_na = 4,
vp8_vorbis_webm_http_na_na = 3,
h264_aac_3gp_rtsp_na_na = 2,
h264_aac_ts_http_m3u8_http = 1
}
return rank[f.type] and rank[f.type] or 0
end
function ZDFmediathek.rank_quality(f)
local rank = { hd = 5, veryhigh = 4, high = 3, med = 2, low = 1 }
return rank[f.quality] and rank[f.quality] or 0
end
function ZDFmediathek.compare_format(f1, f2)
local t1 = ZDFmediathek.rank_type(f1)
local t2 = ZDFmediathek.rank_type(f2)
if (t1 ~= t2) then
return t1 > t2
end
if f1.width and f2.width and f1.height and f2.height then
local U = require 'quvi/util'
return U.is_higher_quality(f1, f2)
end
return ZDFmediathek.rank_quality(f1) > ZDFmediathek.rank_quality(f2)
end
function ZDFmediathek.choose_best(t)
table.sort(t, ZDFmediathek.compare_format)
return t[1]
end
ZDFmediathek.choose_default = ZDFmediathek.choose_best
function ZDFmediathek.to_s(t)
return table.concat({ t.container,
(t.protocol ~= "http") and '_' .. t.protocol or '',
'_', (t.height) and t.height ..'p' or t.quality })
end
-- vim: set ts=4 sw=4 tw=72 expandtab:
|
