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-- libquvi-scripts
-- Copyright (C) 2014 Benjamin Franzke <benjaminfranzke@googlemail.com>
--
-- This file is part of libquvi-scripts <http://quvi.sourceforge.net/>.
--
-- This program is free software: you can redistribute it and/or
-- modify it under the terms of the GNU Affero General Public
-- License as published by the Free Software Foundation, either
-- version 3 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 Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General
-- Public License along with this program. If not, see
-- <http://www.gnu.org/licenses/>.
--
local ZDFmediathek = {} -- Utility functions unique to this script.
-- Identify the script.
function ident(qargs)
return {
can_parse_url = ZDFmediathek.can_parse_url(qargs),
domains = table.concat({'zdf.de'}, ',')
}
end
function ZDFmediathek.can_parse_url(qargs)
local U = require 'socket.url'
local t = U.parse(qargs.input_url)
if t and t.scheme and t.scheme:lower():match('^http$')
and t.host and t.host:lower():match('zdf%.de$')
and t.path and t.path:match('/ZDFmediathek/')
then
return true
else
return false
end
end
ZDFmediathek.xmlservice_schema = {
status = { statuscode = false, debuginfo = true },
video = {
information = { title = false },
details = { lengthSec = true },
teaserimages = { teaserimage = {} },
formitaeten = {
formitaet = {
quality = false,
url = false,
width = true,
height = true,
videoBitrate = true,
audioBitrate = true,
facets = { facet = false }
}
}
}
}
function ZDFmediathek.find_tag(t, tag)
local r = {}
for i=1, #t do
if t[i].tag == tag then
table.insert(r, t[i])
end
end
return r
end
function ZDFmediathek.find_first_tag(t, tag, optional)
for i=1, #t do
if t[i].tag == tag then
return t[i]
end
end
if optional then
return {}
else
error("[find_first_tag] no match: tag=" .. tag)
end
end
function ZDFmediathek.extract_schema(x, s)
local t = {}
for k,v in pairs(s) do
if type(v) == "boolean" then
t[k] = ZDFmediathek.find_first_tag(x, k, v)[1]
elseif type(v) == "table" then
local tags = ZDFmediathek.find_tag(x, k)
t[k] = {}
for _,tag in ipairs(tags) do
if next(v) == nil then -- if v is empty insert the tag values
table.insert(t[k], tag[1])
else
local d = ZDFmediathek.extract_schema(tag, v)
d.attr = tag.attr
table.insert(t[k], d)
end
end
if #t[k] == 1 then t[k] = t[k][1] end
end
end
return t
end
-- Parse media URL.
function parse(qargs)
local P = require 'lxp.lom'
qargs.id = qargs.input_url:match('/ZDFmediathek/#?/?beitrag/video/(%d+)') or
qargs.input_url:match('/ZDFmediathek/#?/?beitrag/live/(%d+)')
or error ("no match: media id")
local xml = { "http://www.zdf.de/",
"ZDFmediathek/xmlservice/web/beitragsDetails?id=", qargs.id }
local c = quvi.http.fetch(table.concat(xml)).data
local x = P.parse(c)
local r = ZDFmediathek.extract_schema(x, ZDFmediathek.xmlservice_schema)
io.stderr:write(dump(r) .. '\n')
if r.status.statuscode ~= "ok" then
error(table.concat({'error: ', r.status.statuscode, ' - ', r.status.debuginfo or ''}))
end
qargs.title = r.video.information.title
local imgs = r.video.teaserimages.teaserimage
qargs.thumb_url = imgs[#imgs]
qargs.duration_ms = 1000 * tonumber(r.video.details.lengthSec or '0')
qargs.streams = ZDFmediathek.iter_streams(r)
return qargs
end
function ZDFmediathek.add_stream(t, s)
local e = s.nostd
if e.facet == 'hbbtv' then return end -- Only for HBBTV useragents, drop it.
table.insert(t, s)
-- 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 e.quality == "high" and e.type == "h264_aac_f4f_http_f4m_http" then
local new = { container = "mp4" ,
nostd = { type = "h264_aac_mp4_http_na_na" } }
new.url = ZDFmediathek.http_mp4_from_f4m(s.url)
if new.url then
table.insert(t, ZDFmediathek.merge_stream_descriptor(s, new))
end
end
-- HD quality movies are not listed with an http url.
-- But one can build it from the rtmp URL given in a .meta file:
if e.quality == "hd" and e.type == "h264_aac_mp4_rtmp_zdfmeta_http" then
local n = { container = "mp4",
nostd = { type = "h264_aac_mp4_http_na_na", protocol = "http" }}
new.url = ZDFmediathek.http_mp4_from_zdfmeta(s.url)
if new.url then
table.insert(t, ZDFmediathek.merge_stream_descriptor(s, new))
end
end
end
function ZDFmediathek.stream_apply_quirks(s, U)
if U.ends_with(s.url, 'manifest.f4m') then
s.url = s.url .. '?hdcore' -- The server returns 403 without ?hdcore
end
if s.nostd.type == 'h264_aac_na_rtsp_mov_http' then
s.nostd.type = 'h264_aac_3gp_rtsp_na_na' -- Add missing container specifier
end
end
function ZDFmediathek.iter_streams(r)
local S = require 'quvi/stream'
local U = require 'quvi/util'
local t = {}
for _,fmt in ipairs(r.video.formitaeten.formitaet) do
local s = S.stream_new(fmt.url)
s.nostd = { type = fmt.attr.basetype or error("missing type attribute"),
quality = fmt.quality }
ZDFmediathek.stream_apply_quirks(s, U)
s.video.width = tonumber(fmt.width or 0)
s.video.height = tonumber(fmt.height or 0)
s.video.bitrate_kbit_s = fmt.videoBitrate or ''
s.audio.bitrate_kbit_s = fmt.audioBitrate or ''
s.video.encoding, s.audio.encoding, s.container, s.nostd.protocol =
s.nostd.type:match("^(.-)_(.-)_(.-)_(.-)_.-")
s.nostd.facet = fmt.facets.facet or nil
ZDFmediathek.add_stream(t, s)
end
for _,v in pairs(t) do
v.id = ZDFmediathek.to_id(v)
end
table.sort(t, ZDFmediathek.compare_stream)
-- After sort, first stream is the best
t[1].flags.best = true
return t
end
function ZDFmediathek.http_mp4_from_zdfmeta(meta_url)
local c = quvi.http.fetch(meta_url).data
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.http.fetch(f4m_url).data
local t = { max_rate = 0, path = nil }
for p, r in c:gmatch('href="(.-)/manifest%.f4m%?hdcore" bitrate="(%d+)"') do
if tonumber(r) > t.max_rate then
t = { max_rate = tonumber(r), path = p }
end
end
return t.path and "http://nrodl.zdf.de/none/" .. t.path or nil
end
function ZDFmediathek.rank_type(s)
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[s.nostd.type] and rank[s.nostd.type] or 0
end
function ZDFmediathek.rank_quality(s)
local rank = { hd = 5, veryhigh = 4, high = 3, med = 2, low = 1 }
return rank[s.nostd.quality] and rank[s.nostd.quality] or 0
end
function ZDFmediathek.compare_stream(s1, s2)
local t1 = ZDFmediathek.rank_type(s1)
local t2 = ZDFmediathek.rank_type(s2)
if (t1 ~= t2) then
return t1 > t2
end
local v = { s1.video, s2.video }
if v[1].width and v[2].width and v[1].height and v[2].height then
return v[1].width > v[2].width and v[1].height > v[2].height
end
return ZDFmediathek.rank_quality(s1) > ZDFmediathek.rank_quality(s2)
end
function ZDFmediathek.to_id(s)
local proto = (s.nostd.protocol ~= "http") and '_' .. s.nostd.protocol or ''
local quality = (s.video.height) and s.video.height ..'p' or s.nostd.quality
return table.concat({ s.container, proto, '_', quality })
end
function ZDFmediathek.table_append(source, dest)
for k,v in pairs(source) do
if type(v) == "table" then
if type(dest[k]) ~= "table" then
dest[k] = {}
end
ZDFmediathek.table_append(v, dest[k])
else
dest[k] = v
end
end
end
function ZDFmediathek.merge_stream_descriptor(s1, s2)
local t = {}
ZDFmediathek.table_append(s1, t)
ZDFmediathek.table_append(s2, t)
return t
end
function dump(o)
if type(o) == 'table' then
local s = '{ '
for k,v in pairs(o) do
if type(k) ~= 'number' then k = '"'..k..'"' end
s = s .. '['..k..'] = ' .. dump(v) .. ','
end
return s .. '} '
else
return tostring(o)
end
end
-- vim: set ts=2 sw=2 tw=72 expandtab:
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