pre-commit hook: only check indentation of those files we're trying to commit and...
[platform/upstream/gst-common.git] / gst-xmlinspect.py
1 # -*- Mode: Python -*-
2 # vi:si:et:sw=4:sts=4:ts=4
3
4 """
5 examine all plugins and elements and output xml documentation for them
6 used as part of the plugin documentation build
7 """
8
9 import sys
10 import os
11 import pygst
12 pygst.require('0.10')
13 import gst
14
15 INDENT_SIZE = 2
16
17 # all templates
18
19 PAD_TEMPLATE = """<caps>
20   <name>%(name)s</name>
21   <direction>%(direction)s</direction>
22   <presence>%(presence)s</presence>
23   <details>%(details)s</details>
24 </caps>"""
25
26 ELEMENT_TEMPLATE = """<element>
27   <name>%(name)s</name>
28   <longname>%(longname)s</longname>
29   <class>%(class)s</class>
30   <description>%(description)s</description>
31   <author>%(author)s</author>
32   <pads>
33 %(pads)s
34   </pads>
35 </element>"""
36
37 PLUGIN_TEMPLATE = """<plugin>
38   <name>%(name)s</name>
39   <description>%(description)s</description>
40   <filename>%(filename)s</filename>
41   <basename>%(basename)s</basename>
42   <version>%(version)s</version>
43   <license>%(license)s</license>
44   <source>%(source)s</source>
45   <package>%(package)s</package>
46   <origin>%(origin)s</origin>
47   <elements>
48 %(elements)s
49   </elements>
50 </plugin>"""
51
52 def xmlencode(line):
53     """
54     Replace &, <, and >
55     """
56     line = "&amp;".join(line.split("&"))
57     line = "&lt;".join(line.split("<"))
58     line = "&gt;".join(line.split(">"))
59     return line
60
61 def get_offset(indent):
62     return " " * INDENT_SIZE * indent
63
64 def output_pad_template(pt, indent=0):
65     print  "PAD TEMPLATE", pt.name_template
66     paddir = ("unknown","source","sink")
67     padpres = ("always","sometimes","request")
68     
69     d = {
70       'name':        xmlencode(pt.name_template),
71       'direction':   xmlencode(paddir[pt.direction]),
72       'presence':    xmlencode(padpres[pt.presence]),
73       'details':     xmlencode(pt.static_caps.string),
74     }
75     block = PAD_TEMPLATE % d
76
77     offset = get_offset(indent)
78     return offset + ("\n" + offset).join(block.split("\n"))
79     
80 def output_element_factory(elf, indent=0):
81     print  "ELEMENT", elf.get_name()
82
83     padsoutput = []
84     padtemplates = elf.get_static_pad_templates()
85     for padtemplate in padtemplates:
86         padsoutput.append(output_pad_template(padtemplate, indent))
87
88     d = {
89         'name':        xmlencode(elf.get_name()),
90         'longname':    xmlencode(elf.get_longname()),
91         'class':       xmlencode(elf.get_klass()),
92         'description': xmlencode(elf.get_description()),
93         'author':      xmlencode(elf.get_author()),
94         'pads': "\n".join(padsoutput),
95     }
96     block = ELEMENT_TEMPLATE % d
97
98     offset = get_offset(indent)
99     return offset + ("\n" + offset).join(block.split("\n"))
100
101 def output_plugin(plugin, indent=0):
102     print "PLUGIN", plugin.get_name()
103     version = plugin.get_version()
104     
105     elements = {}
106     gst.debug('getting features for plugin %s' % plugin.get_name())
107     registry = gst.registry_get_default()
108     features = registry.get_feature_list_by_plugin(plugin.get_name())
109     gst.debug('plugin %s has %d features' % (plugin.get_name(), len(features)))
110     for feature in features:
111         if isinstance(feature, gst.ElementFactory):
112             elements[feature.get_name()] = feature
113     #gst.debug("got features")
114         
115     elementsoutput = []
116     keys = elements.keys()
117     keys.sort()
118     for name in keys:
119         feature = elements[name]
120         elementsoutput.append(output_element_factory(feature, indent + 2))
121
122     filename = plugin.get_filename()
123     basename = filename
124     if basename:
125         basename = os.path.basename(basename)
126     d = {
127         'name':        xmlencode(plugin.get_name()),
128         'description': xmlencode(plugin.get_description()),
129         'filename':    filename,
130         'basename':    basename,
131         'version':     version,
132         'license':     xmlencode(plugin.get_license()),
133         'source':      xmlencode(plugin.get_source()),
134         'package':     xmlencode(plugin.get_package()),
135         'origin':      xmlencode(plugin.get_origin()),
136         'elements': "\n".join(elementsoutput),
137     }
138     block = PLUGIN_TEMPLATE % d
139     
140     offset = get_offset(indent)
141     return offset + ("\n" + offset).join(block.split("\n"))
142
143 def main():
144     if len(sys.argv) == 1:
145         sys.stderr.write("Please specify a source module to inspect")
146         sys.exit(1)
147     source = sys.argv[1]
148
149     if len(sys.argv) > 2:
150         os.chdir(sys.argv[2])
151
152     registry = gst.registry_get_default()
153     all = registry.get_plugin_list()
154     for plugin in all:
155         gst.debug("inspecting plugin %s from source %s" % (
156             plugin.get_name(), plugin.get_source()))
157         # this skips gstcoreelements, with bin and pipeline
158         if plugin.get_filename() is None:
159             continue
160         if plugin.get_source() != source:
161             continue
162
163         filename = "plugin-%s.xml" % plugin.get_name()
164         handle = open(filename, "w")
165         handle.write(output_plugin(plugin))
166         handle.close()
167
168 main()