audio: Remove playlist elements
This commit is contained in:
Stein Magnus Jodal
parent
1a2cb8f6b5
commit
c0e9593a0b
@ -13,7 +13,7 @@ import gst.pbutils # noqa
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import pykka
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from mopidy import exceptions
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from mopidy.audio import icy, playlists, utils
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from mopidy.audio import icy, utils
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from mopidy.audio.constants import PlaybackState
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from mopidy.audio.listener import AudioListener
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from mopidy.internal import deprecation, process
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@ -27,8 +27,6 @@ logger = logging.getLogger(__name__)
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gst_logger = logging.getLogger('mopidy.audio.gst')
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icy.register()
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playlists.register_typefinders()
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playlists.register_elements()
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_GST_STATE_MAPPING = {
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gst.STATE_PLAYING: PlaybackState.PLAYING,
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@ -2,8 +2,6 @@ from __future__ import absolute_import, unicode_literals
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import io
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import gobject
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import pygst
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pygst.require('0.10')
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import gst # noqa
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@ -107,262 +105,3 @@ def parse_asx(data):
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for entry in element.findall('entry[@href]'):
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yield entry.get('href', '').strip()
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def parse_urilist(data):
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for line in data.readlines():
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if not line.startswith('#') and gst.uri_is_valid(line.strip()):
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yield line
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def playlist_typefinder(typefind, func, caps):
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if func(typefind):
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typefind.suggest(gst.TYPE_FIND_MAXIMUM, caps)
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def register_typefind(mimetype, func, extensions):
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caps = gst.caps_from_string(mimetype)
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gst.type_find_register(mimetype, gst.RANK_PRIMARY, playlist_typefinder,
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extensions, caps, func, caps)
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def register_typefinders():
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register_typefind('audio/x-mpegurl', detect_m3u_header, [b'm3u', b'm3u8'])
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register_typefind('audio/x-scpls', detect_pls_header, [b'pls'])
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register_typefind('application/xspf+xml', detect_xspf_header, [b'xspf'])
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# NOTE: seems we can't use video/x-ms-asf which is the correct mime for asx
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# as it is shared with asf for streaming videos :/
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register_typefind('audio/x-ms-asx', detect_asx_header, [b'asx'])
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class BasePlaylistElement(gst.Bin):
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"""Base class for creating GStreamer elements for playlist support.
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This element performs the following steps:
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1. Initializes src and sink pads for the element.
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2. Collects data from the sink until EOS is reached.
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3. Passes the collected data to :meth:`convert` to get a list of URIs.
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4. Passes the list of URIs to :meth:`handle`, default handling is to pass
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the URIs to the src element as a uri-list.
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5. If handle returned true, the EOS consumed and nothing more happens, if
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it is not consumed it flows on to the next element downstream, which is
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likely our uri-list consumer which needs the EOS to know we are done
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sending URIs.
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"""
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sinkpad_template = None
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"""GStreamer pad template to use for sink, must be overriden."""
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srcpad_template = None
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"""GStreamer pad template to use for src, must be overriden."""
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ghost_srcpad = False
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"""Indicates if src pad should be ghosted or not."""
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def __init__(self):
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"""Sets up src and sink pads plus behaviour."""
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super(BasePlaylistElement, self).__init__()
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self._data = io.BytesIO()
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self._done = False
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self.sinkpad = gst.Pad(self.sinkpad_template)
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self.sinkpad.set_chain_function(self._chain)
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self.sinkpad.set_event_function(self._event)
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self.add_pad(self.sinkpad)
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if self.ghost_srcpad:
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self.srcpad = gst.ghost_pad_new_notarget('src', gst.PAD_SRC)
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else:
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self.srcpad = gst.Pad(self.srcpad_template)
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self.add_pad(self.srcpad)
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def convert(self, data):
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"""Convert the data we have colleted to URIs.
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:param data: collected data buffer
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:type data: :class:`io.BytesIO`
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:returns: iterable or generator of URIs
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"""
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raise NotImplementedError
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def handle(self, uris):
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"""Do something useful with the URIs.
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:param uris: list of URIs
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:type uris: :type:`list`
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:returns: boolean indicating if EOS should be consumed
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"""
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# TODO: handle unicode uris which we can get out of elementtree
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self.srcpad.push(gst.Buffer('\n'.join(uris)))
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return False
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def _chain(self, pad, buf):
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if not self._done:
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self._data.write(buf.data)
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return gst.FLOW_OK
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return gst.FLOW_EOS
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def _event(self, pad, event):
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if event.type == gst.EVENT_NEWSEGMENT:
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return True
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if event.type == gst.EVENT_EOS:
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self._done = True
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self._data.seek(0)
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if self.handle(list(self.convert(self._data))):
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return True
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# Ensure we handle remaining events in a sane way.
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return pad.event_default(event)
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class M3uDecoder(BasePlaylistElement):
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__gstdetails__ = ('M3U Decoder',
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'Decoder',
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'Convert .m3u to text/uri-list',
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'Mopidy')
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sinkpad_template = gst.PadTemplate(
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'sink', gst.PAD_SINK, gst.PAD_ALWAYS,
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gst.caps_from_string('audio/x-mpegurl'))
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srcpad_template = gst.PadTemplate(
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'src', gst.PAD_SRC, gst.PAD_ALWAYS,
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gst.caps_from_string('text/uri-list'))
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__gsttemplates__ = (sinkpad_template, srcpad_template)
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def convert(self, data):
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return parse_m3u(data)
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class PlsDecoder(BasePlaylistElement):
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__gstdetails__ = ('PLS Decoder',
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'Decoder',
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'Convert .pls to text/uri-list',
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'Mopidy')
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sinkpad_template = gst.PadTemplate(
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'sink', gst.PAD_SINK, gst.PAD_ALWAYS,
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gst.caps_from_string('audio/x-scpls'))
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srcpad_template = gst.PadTemplate(
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'src', gst.PAD_SRC, gst.PAD_ALWAYS,
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gst.caps_from_string('text/uri-list'))
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__gsttemplates__ = (sinkpad_template, srcpad_template)
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def convert(self, data):
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return parse_pls(data)
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class XspfDecoder(BasePlaylistElement):
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__gstdetails__ = ('XSPF Decoder',
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'Decoder',
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'Convert .pls to text/uri-list',
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'Mopidy')
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sinkpad_template = gst.PadTemplate(
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'sink', gst.PAD_SINK, gst.PAD_ALWAYS,
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gst.caps_from_string('application/xspf+xml'))
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srcpad_template = gst.PadTemplate(
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'src', gst.PAD_SRC, gst.PAD_ALWAYS,
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gst.caps_from_string('text/uri-list'))
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__gsttemplates__ = (sinkpad_template, srcpad_template)
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def convert(self, data):
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return parse_xspf(data)
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class AsxDecoder(BasePlaylistElement):
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__gstdetails__ = ('ASX Decoder',
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'Decoder',
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'Convert .asx to text/uri-list',
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'Mopidy')
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sinkpad_template = gst.PadTemplate(
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'sink', gst.PAD_SINK, gst.PAD_ALWAYS,
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gst.caps_from_string('audio/x-ms-asx'))
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srcpad_template = gst.PadTemplate(
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'src', gst.PAD_SRC, gst.PAD_ALWAYS,
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gst.caps_from_string('text/uri-list'))
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__gsttemplates__ = (sinkpad_template, srcpad_template)
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def convert(self, data):
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return parse_asx(data)
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class UriListElement(BasePlaylistElement):
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__gstdetails__ = ('URIListDemuxer',
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'Demuxer',
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'Convert a text/uri-list to a stream',
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'Mopidy')
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sinkpad_template = gst.PadTemplate(
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'sink', gst.PAD_SINK, gst.PAD_ALWAYS,
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gst.caps_from_string('text/uri-list'))
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srcpad_template = gst.PadTemplate(
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'src', gst.PAD_SRC, gst.PAD_ALWAYS,
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gst.caps_new_any())
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ghost_srcpad = True # We need to hook this up to our internal decodebin
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__gsttemplates__ = (sinkpad_template, srcpad_template)
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def __init__(self):
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super(UriListElement, self).__init__()
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self.uridecodebin = gst.element_factory_make('uridecodebin')
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self.uridecodebin.connect('pad-added', self.pad_added)
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# Limit to anycaps so we get a single stream out, letting other
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# elements downstream figure out actual muxing
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self.uridecodebin.set_property('caps', gst.caps_new_any())
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def pad_added(self, src, pad):
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self.srcpad.set_target(pad)
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pad.add_event_probe(self.pad_event)
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def pad_event(self, pad, event):
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if event.has_name('urilist-played'):
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error = gst.GError(gst.RESOURCE_ERROR, gst.RESOURCE_ERROR_FAILED,
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b'Nested playlists not supported.')
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message = b'Playlists pointing to other playlists is not supported'
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self.post_message(gst.message_new_error(self, error, message))
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return 1 # GST_PAD_PROBE_OK
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def handle(self, uris):
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struct = gst.Structure('urilist-played')
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event = gst.event_new_custom(gst.EVENT_CUSTOM_UPSTREAM, struct)
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self.sinkpad.push_event(event)
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# TODO: hookup about to finish and errors to rest of URIs so we
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# round robin, only giving up once all have been tried.
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# TODO: uris could be empty.
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self.add(self.uridecodebin)
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self.uridecodebin.set_state(gst.STATE_READY)
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self.uridecodebin.set_property('uri', uris[0])
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self.uridecodebin.sync_state_with_parent()
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return True # Make sure we consume the EOS that triggered us.
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def convert(self, data):
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return parse_urilist(data)
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def register_element(element_class):
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gobject.type_register(element_class)
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gst.element_register(
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element_class, element_class.__name__.lower(), gst.RANK_MARGINAL)
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def register_elements():
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register_element(M3uDecoder)
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register_element(PlsDecoder)
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register_element(XspfDecoder)
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register_element(AsxDecoder)
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register_element(UriListElement)
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