3 -- Copyright (C) 2010,2011 Toni Gundogdu <legatvs@gmail.com>
5 -- This file is part of quvi <http://quvi.sourceforge.net/>.
7 -- This library is free software; you can redistribute it and/or
8 -- modify it under the terms of the GNU Lesser General Public
9 -- License as published by the Free Software Foundation; either
10 -- version 2.1 of the License, or (at your option) any later version.
12 -- This library is distributed in the hope that it will be useful,
13 -- but WITHOUT ANY WARRANTY; without even the implied warranty of
14 -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 -- Lesser General Public License for more details.
17 -- You should have received a copy of the GNU Lesser General Public
18 -- License along with this library; if not, write to the Free Software
19 -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
23 local YouTube
= {} -- Utility functions unique to this script
25 -- <http://en.wikipedia.org/wiki/YouTube#Quality_and_codecs>
27 -- Identify the script.
29 package
.path
= self
.script_dir
.. '/?.lua'
30 local C
= require
'quvi/const'
32 r
.domain
= "youtube.com"
33 r
.formats
= "default|best"
34 r
.categories
= C
.proto_http
35 self
.page_url
= YouTube
.normalize(self
.page_url
)
36 local U
= require
'quvi/util'
37 r
.handles
= U
.handles(self
.page_url
,
38 {r
.domain
}, {"/watch"}, {"v=[%w-_]+"})
42 -- Query available formats.
43 function query_formats(self
)
44 local config
,U
= YouTube
.get_config(self
)
45 local formats
= YouTube
.iter_formats(config
, U
)
48 for _
,v
in pairs(formats
) do
49 table.insert(t
, YouTube
.to_s(v
))
53 self
.formats
= table.concat(t
, "|")
60 self
.host_id
= "youtube"
61 local page_url
= YouTube
.normalize(self
.page_url
)
63 local _
,_
,s
= page_url
:find('#a?t=(.+)')
64 self
.start_time
= s
or ''
66 return YouTube
.get_video_info(self
)
73 function YouTube
.normalize(url
)
74 if not url
then return url
end
75 url
= url
:gsub("-nocookie", "") -- youtube-nocookie.com
76 url
= url
:gsub("/v/", "/watch?v=") -- embedded
77 url
= url
:gsub("/embed/", "/watch?v=") -- embedded
78 url
= url
:gsub("/e/", "/watch?v=") -- embedded
79 url
= url
:gsub("youtu%.be/","youtube.com/watch?v=") -- youtu.be
83 function YouTube
.get_config(self
)
84 local _
,_
,s
= self
.page_url
:find('^(%w+)://')
85 local scheme
= s
or error("no match: scheme")
87 local page_url
= YouTube
.normalize(self
.page_url
)
89 local _
,_
,s
= page_url
:find("v=([%w-_]+)")
90 self
.id
= s
or error("no match: media id")
92 local s_fmt
= "%s://www.youtube.com/get_video_info?&video_id=%s"
93 .. "&el=detailpage&ps=default&eurl=&gl=US&hl=en"
95 local config_url
= string.format(s_fmt
, scheme
, self
.id
)
97 local U
= require
'quvi/util'
98 local config
= U
.decode(quvi
.fetch(config_url
, {fetch_type
='config'}))
100 if config
['reason'] then
101 local reason
= U
.unescape(config
['reason'])
102 local code
= config
['errorcode']
103 error(string.format("%s (code=%s)", reason
, code
))
109 function YouTube
.iter_formats(config
, U
)
110 local fmt_stream_map
= config
['url_encoded_fmt_stream_map']
111 or error("no match: url_encoded_fmt_stream_map")
113 fmt_stream_map
= U
.unescape(fmt_stream_map
) .. ","
116 for f
in fmt_stream_map
:gfind('([^,]*),') do
117 local d
= U
.decode(f
)
118 if d
['itag'] and d
['url'] then
119 urls
[U
.unescape(d
['itag'])] = U
.unescape(d
['url'])
123 local fmt_map
= config
['fmt_list'] or error("no match: fmt_list")
124 fmt_map
= U
.unescape(fmt_map
)
127 for f
,w
,h
in fmt_map
:gfind('(%d+)/(%d+)x(%d+)') do
129 table.insert(r
, {fmt_id
=tonumber(f
), url
=urls
[f
],
130 width
=tonumber(w
), height
=tonumber(h
)})
136 function YouTube
.get_video_info(self
)
137 local config
,U
= YouTube
.get_config(self
)
139 self
.title
= config
['title'] or error('no match: media title')
140 self
.title
= U
.unescape(self
.title
)
142 self
.thumbnail_url
= config
['thumbnail_url'] or ''
143 if #self
.thumbnail_url
> 0 then
144 self
.thumbnail_url
= U
.unescape(self
.thumbnail_url
)
147 self
.duration
= (config
['length_seconds'] or 0)*1000 -- to msec
149 self
.requested_format
=
150 YouTube
.convert_deprecated_id(self
.requested_format
)
152 local formats
= YouTube
.iter_formats(config
, U
)
153 local url
= U
.choose_format(self
, formats
,
155 YouTube
.choose_default
,
157 or error("no match: media url")
159 if url
and #self
.start_time
> 0 then
160 local min, sec
= self
.start_time
:match("^(%d+)m(%d+)s$")
161 min = tonumber(min) or 0
162 sec
= tonumber(sec
) or 0
163 local msec
= (min * 60000) + (sec
* 1000)
165 url
= url
.. "&begin=" .. msec
174 function YouTube
.choose_best(formats
) -- Highest quality available
175 local r
= {width
=0, height
=0, url
=nil}
176 local U
= require
'quvi/util'
177 for _
,v
in pairs(formats
) do
178 if U
.is_higher_quality(v
,r
) then
182 -- for k,v in pairs(r) do print(k,v) end
186 function YouTube
.choose_default(formats
) -- Lowest quality available
187 local r
= {width
=0xffff, height
=0xffff, url
=nil}
188 local U
= require
'quvi/util'
189 for _
,v
in pairs(formats
) do
190 if U
.is_lower_quality(v
,r
) then
194 -- for k,v in pairs(r) do print(k,v) end
198 YouTube
.conv_table
= { -- Deprecated.
210 function YouTube
.convert_deprecated_id(r_fmt
)
211 if YouTube
.conv_table
[r_fmt
] then
212 local s
= string.format("fmt%02d_", YouTube
.conv_table
[r_fmt
])
213 r_fmt
= r_fmt
:gsub("^(%w+)_", s
)
218 function YouTube
.to_s(t
)
219 return string.format("fmt%02d_%sp", t
.fmt_id
, t
.height
)
222 -- vim: set ts=4 sw=4 tw=72 expandtab: