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|
------------------------------------------------------------------------------
--
-- LGI Gst override module.
--
-- Copyright (c) 2010-2013 Pavel Holejsovsky
-- Licensed under the MIT license:
-- http://www.opensource.org/licenses/mit-license.php
--
------------------------------------------------------------------------------
local ipairs, tonumber = ipairs, tonumber
local os = require 'os'
local lgi = require 'lgi'
local gi = require('lgi.core').gi
local GLib = lgi.GLib
local Gst = lgi.Gst
if tonumber(Gst._version) < 1.0 then
-- GstObject has special ref_sink mechanism, make sure that lgi
-- core is aware of it, otherwise refcounting is screwed.
Gst.Object._refsink = gi.Gst.Object.methods.ref_sink
end
-- Gst.Element; GstElement uses ugly macro accessors instead of proper
-- GObject properties, so add attributes for assorted Gst.Element
-- properties.
Gst.Element._attribute = {}
for _, name in ipairs {
'name', 'parent', 'bus', 'clock', 'base_time', 'start_time',
'factory', 'index', 'state' } do
Gst.Element._attribute[name] = {
get = Gst.Element['get_' .. name],
set = Gst.Element['set_' .. name],
}
end
function Gst.Element:link_many(...)
local target = self
for _, source in ipairs {...} do
if not target:link(source) then
return false
end
target = source
end
return true
end
-- Gst.Bin adjustments
if tonumber(Gst._version) < 1.0 then
function Gst.Bus:add_watch(priority, callback)
if not callback then
callback = priority
priority = GLib.PRIORITY_DEFAULT
end
return self:add_watch_full(priority, callback)
end
end
function Gst.Bin:add_many(...)
local args = {...}
for i = 1, #args do self:add(args[i]) end
end
-- Gst.TagList adjustments
if not Gst.TagList.copy_value then
Gst.TagList._method.copy_value = Gst.tag_list_copy_value
end
function Gst.TagList:get(tag)
local gvalue = self:copy_value(tag)
return gvalue and gvalue.value
end
-- Load additional Gst modules.
if tonumber(Gst._version) < 1.0 then
local GstInterfaces = lgi.require('GstInterfaces', Gst._version)
end
-- Initialize gstreamer.
Gst.init()
-- Undo unfortunate gstreamer's setlocale(LC_ALL, ""), which breaks
-- Lua's tonumber() implementation for some locales (e.g. pl_PL, pt_BR
-- and probably many others).
os.setlocale ('C', 'numeric')
|
