370 lines
13 KiB
Python
370 lines
13 KiB
Python
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import os
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from flask import Flask, Response, request
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import re
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import json
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import click
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from time import time
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from flask import send_from_directory
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def which(*names):
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for d in os.environ.get("PATH").split(":"):
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for name in names:
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path = os.path.join(d, name)
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if os.path.exists(path):
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return path
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raise ValueError("Couldn't find %s anywhere in $PATH" % names)
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MADPLAY = which("madplay")
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CURL = which("curl")
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FLAC = which("flac")
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LAME = which("lame")
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FFMPEG = which("avconv", "ffmpeg")
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OGGDEC = which("oggdec")
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OGGENC = which("oggenc")
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TYPES = {
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"mp3": "audio/mpeg",
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"flac": "audio/flac",
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"oga": "audio/ogg",
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"ogg": "audio/ogg",
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"wma": "audio/x-ms-wma",
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"wav": "audio/wave",
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}
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RE_URL = re.compile(
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r'^https?://' # http:// or https://
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r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' # domain...
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r'localhost|' # localhost...
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r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|' # ...or ipv4
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r'\[?[A-F0-9]*:[A-F0-9:]+\]?)' # ...or ipv6
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r'(?::\d+)?' # optional port
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r'(?:/?|[/?]\S+)$', re.IGNORECASE)
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XML_ENTITIES = (
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("&", "&"),
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('"', """),
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("'", "'"),
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(">", ">"),
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("<", "<"),
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)
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def escape_xml_entities(j):
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for letter, replacement in XML_ENTITIES:
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j = j.replace(letter, replacement)
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return j
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def generate_xspf(root, names):
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names.sort()
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yield "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
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yield "<playlist xmlns=\"http://xspf.org/ns/0/\" version=\"1\">"
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yield "<meta rel=\"timestamp\">%d</meta>" % time()
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yield "<trackList>"
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for name in names:
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path = os.path.join(root, name)
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basename, extension = os.path.splitext(name)
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import mutagen
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import mutagen.mp3
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try:
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if name.lower().endswith(".mp3"):
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tags = mutagen.mp3.EasyMP3(path)
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else:
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tags = mutagen.File(path)
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except mutagen.MutagenError:
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click.echo("Failed to parse metainformation for %s" % repr(path))
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# Fetch stream attributes
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sample_rate = getattr(tags.info, "sample_rate", None)
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duration = getattr(tags.info, "length", None)
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channels = getattr(tags.info, "channels", None)
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bitrate = getattr(tags.info, "bitrate", None)
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bit_depth = getattr(tags.info, "bits_per_sample", None)
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# Workaround for calculating bitrate
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if not bitrate and duration:
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bitrate = int(item.size / duration) / 1000 * 8000
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# Artist
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artist_name = tags.pop("artist", (None,))[0]
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if not artist_name:
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artist_name = tags.pop("----:com.apple.iTunes:Artist Credit", (None,))[0]
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# Track album
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album_title = tags.pop("album", (None,))[0]
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if not album_title:
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album_title = tags.pop("----:com.apple.iTunes:Album Credit", (None,))[0]
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# Album artist
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album_artist_name = None
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if not album_artist_name:
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album_artist_name = tags.pop("----:com.apple.iTunes:Album Artist Credit", (None,))[0]
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# Track title
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track_title = tags.pop("title", (None,))[0]
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# Track year
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year, = tags.pop("date", (None,))
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if not year:
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year, = tags.pop("----:com.apple.iTunes:ORIGINAL YEAR", (None,))
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def parse_x_of_y(mixed):
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if not mixed:
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return None, None
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elif "\x00" in mixed: # Probably bug in mutagen
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return None, None
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elif re.match("\s*\d+\s*$", mixed):
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return int(mixed), None
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elif re.match("\s*\d+\s*/\s*\d+\s*$", mixed):
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return [int(j) for j in mixed.split("/", 1)]
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elif re.match("\s*/\s*\d+\s*$", mixed):
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return None, int(mixed.split("/", 1)[1])
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return None, None
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# Disc numbers
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disc_number, disc_count = None, None
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disc, = tags.pop("discnumber", (None,))
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if disc:
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disc_number, disc_count = parse_x_of_y(disc)
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# Release country
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country_code, = tags.pop("releasecountry", (None,))
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if not country_code:
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country_code, = tags.pop("----:com.apple.iTunes:MusicBrainz Album Release Country", (None,))
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# Track number could be in various formats: '1', '1/12', 'B2'
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track_number = tags.pop("tracknumber", (None,))[0]
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track_number, track_count = parse_x_of_y(track_number)
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if not track_number:
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(track_number, track_count), = tags.pop("trkn", ((None,None),))
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# Normalize country code
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if country_code:
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country_code = country_code.lower()
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if country_code in ("xe", "xw"):
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country_code = None
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yield "<track>"
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yield "<location>%s</location>" % escape_xml_entities(name)
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if duration:
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yield "<duration>%d</duration>" % (duration * 1000)
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if track_title:
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yield "<title>%s</title>" % escape_xml_entities(track_title)
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if artist_name:
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yield "<creator>%s</creator>" % escape_xml_entities(artist_name)
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if album_title:
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yield "<album>%s</album>" % escape_xml_entities(album_title)
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else:
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yield "<title>%s</title>" % escape_xml_entities(basename)
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if track_number:
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yield "<trackNum>%d</trackNum>" % track_number
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if track_count:
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yield "<meta rel=\"track-count\">%d</meta>" % track_count
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if disc_number:
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yield "<meta rel=\"disc-number\">%d</meta>" % disc_number
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if disc_count:
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yield "<meta rel=\"disc-count\">%d</meta>" % disc_count
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if year:
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yield "<meta rel=\"year\">%s</meta>" % year
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if album_artist_name:
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yield "<meta rel=\"album-artist\">%s</meta>" % escape_xml_entities(album_artist_name)
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yield "<meta rel=\"mimetype\">%s</meta>" % TYPES[extension[1:].lower()]
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yield "<meta rel=\"bitrate\">%s</meta>" % bitrate
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yield "<meta rel=\"bit_depth\">%s</meta>" % bit_depth
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yield "<meta rel=\"sample_rate\">%s</meta>" % sample_rate
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yield "</track>"
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yield "</trackList>"
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yield "</playlist>"
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@click.command("metagen")
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@click.option('--root', '-r', prompt='Path to media directory', help='Root directory to index')
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@click.option('--force', '-f', is_flag=True, help="Reindex even if up to date according to timestamps")
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def metagen(root, force):
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for abspath, dirs, files in os.walk(root):
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playlist = os.path.join(abspath, "index.xspf")
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needed = False
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relevant_files = []
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for name in files:
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for extension, mimetype in TYPES.items():
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if name.lower().endswith("." + extension):
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needed = True
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relevant_files.append(name)
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if "index.xspf" in files:
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# TODO proper handling here, microsecond differences
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if not force and int(os.stat(abspath).st_mtime) <= int(os.stat(playlist).st_mtime):
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click.echo("Folder %s is up to date" % repr(abspath))
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needed = False
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if not relevant_files:
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click.echo("No more relevant files, removing %s" % playlist)
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os.remove(playlist)
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if "index.xspf.part" in files:
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click.echo("Cleaning up %s.part" % playlist)
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os.remove(playlist + ".part")
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if needed:
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with open(playlist + ".part", "w") as fh:
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for chunk in generate_xspf(abspath, relevant_files):
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fh.write(chunk)
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os.rename(playlist + ".part", playlist)
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click.echo("Generated %s" % repr(playlist))
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@click.command("serve")
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@click.option('--root', prompt='Path to media directory', help='Root directory to serve')
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def serve(root):
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app = Flask(__name__)
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@app.route("/api/transcode/")
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def transcode():
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def build_pipeline(source, output_mimetype):
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sys.stderr.write("Transcoding from: %s\n" % source)
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basename, extension = os.path.splitext(source)
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extension = extension.lower()
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try:
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input_mimetype = TYPES.get(extension)
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except:
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raise ValueError("Unknown input file extension:", extension)
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sys.stderr.write("Input mimetype: %s\n" % input_mimetype)
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sys.stderr.write("Output mimetype: %s\n" % output_mimetype)
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pipeline = []
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if source.startswith("http://") or source.startswith("https://"):
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# Escape path component
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url = urlparse.urlparse(source)
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source = url.scheme + "://" + url.hostname.encode("idna") + urllib.quote(url.path)
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yield CURL, "--insecure", "--silent", "--limit-rate", "300k", source # 1Mbps is pretty max
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else:
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# Perhaps we could read file directly here if transcoder and web server are in the same machine?
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raise ValueError("Won't transcode:" + source)
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if input_mimetype == "audio/wave":
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pass # Do nothing
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elif input_mimetype == "audio/mpeg":
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yield MADPLAY, "-", "-o", "wave:-"
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elif input_mimetype == "audio/ogg":
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yield OGGDEC, "-", "-o", "-"
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elif input_mimetype == "audio/flac":
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if output_mimetype != "audio/ogg": # oggenc handles FLAC input aswell
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yield FLAC, "--decode", "-", "--stdout", "--silent"
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else:
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# Use FFMPEG/avconv as fallback for decoding wma
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yield FFMPEG, "-i", "-", "-f", "wav", "-", "-loglevel", "quiet"
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if output_mimetype == "audio/wave":
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pass
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elif output_mimetype == "audio/mpeg":
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yield LAME, "--quiet", "-aq", "2", "-", "-"
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elif output_mimetype == "audio/ogg":
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yield OGGENC, "-", "-o", "-"
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else:
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raise ValueError("Don't know how to encode mimetype: %s" % output_mimetype)
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mimetype = request.args.get("mimetype")
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pipeline = tuple(build_pipeline(request.args.get("url"), mimetype))
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first = True
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for element in pipeline:
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if not first:
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print("|",)
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first = False
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print(" ".join(repr(j) if " " in j else j for j in element))
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print()
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process = None
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for element in pipeline:
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process = Popen(element, stdout=PIPE, stdin=process.stdout if process else PIPE, close_fds=True)
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return send_file(process.stdout, "stream", mimetype)
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@app.route("/api/search/")
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def search():
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expr = re.compile(request.args.get('expr', 'metallica'), re.IGNORECASE)
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limit = request.args.get('limit', 100)
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def generate():
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yield 'retry:999999999999\n' # Tell browser to never reconnect
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total = 0
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hits = 0
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counter = 0
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for abspath, dirs, files in os.walk(root):
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dirs.sort()
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relpath = os.path.relpath(abspath, root)
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hit = False
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filtered_filenames = []
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for name in files:
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lower_name = name.lower()
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for extension, mimetype in TYPES.items():
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if lower_name.endswith("." + extension):
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filtered_filenames.append(name)
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total += 1
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if expr.search(name):
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hit = True
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hits += 1
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if expr.search(relpath):
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hit = True
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if hit and filtered_filenames:
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yield "event:chdir\ndata:"
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yield relpath
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yield "\n\n"
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yield "event:xspf\n"
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yield "data:"
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if "index.xspf" in files:
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with open(os.path.join(abspath, "index.xspf")) as fh:
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yield fh.read()
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else:
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yield from generate_xspf(abspath, filtered_filenames)
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yield "\n"
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yield "\n"
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counter += 1
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if counter > limit:
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break
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if counter > limit:
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break
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yield "event:done\n"
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yield "data:%s\n" % json.dumps({"relevant_files":total, "hits":hits})
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yield "\n"
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return Response(generate(), mimetype='text/event-stream')
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@app.route('/api/stream/<path:path>')
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def send_stream(path):
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return send_from_directory(root, path)
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@app.route('/<path:path>')
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def send_js(path):
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return send_from_directory('static', path)
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app.run(host= '0.0.0.0', debug=True, threaded=True)
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@click.group()
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def entry_point(): pass
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entry_point.add_command(serve)
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entry_point.add_command(metagen)
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if __name__ == '__main__':
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entry_point()
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