#!/usr/bin/env python
import sys
+import os
+import fnmatch
+import shutil
+import time
+import threading
+from Queue import Queue
+import web
+import json
+
import config
+import bt
-if __name__ == '__main__':
-# transcoder = config.TRANSCODER_CLASS(sys.argv[1])
-# transcoder.transcode('webm', "vorbis", "vp8", a_bitrate="128k", a_samplingrate=22050, a_channels=2, v_bitrate="256k", v_framerate=15, v_resolution="320x240", v_dar="4:3")
+class CIWorker(threading.Thread):
+ """
+ Content Ingestion Worker. A class which executes content ingestion jobs
+ on a separate thread.
+
+ CIWorker shares a Queue with its master where jobs are submitted.
+ """
+
+ raw_videos_dir = 'tmp/raw'
+ transcoded_videos_dir = 'tmp/media'
+ thumbs_dir = 'tmp/thumbs'
+ torrents_dir = 'tmp/torrents'
+
+ def __init__(self, shared, bit_torrent):
+ """
+ Initialize Content Ingestion Worker.
+
+ @param shared data shared with the front-end (Service)
+ """
+
+ threading.Thread.__init__(self, name='CIWorker')
+
+ self.shared = shared
+ self.bit_torrent = bit_torrent
+
+ def transfer_in(self, raw_video):
+ """
+ Transfers a raw video file from the Web Server.
+
+ @param raw_video raw video file name
+ """
+
+ file_transfer = config.FILE_TRANSFERER_CLASS( \
+ self.raw_videos_dir, config.INPUT_PATH)
+ file_transfer.get([raw_video])
+ file_transfer.close()
+
+ print '** Transfering in finished.'
+
+ def transcode(self, input_video, video_name, transcode_configs):
+ """
+ Transcodes a video in each requested formats.
+
+ @param input_video input video file name
+ @param video_name a video name which must be a valid file name
+ @param transcode_configs a list of dictionaries with format settings
+ """
+
+ transcoder = config.TRANSCODER_CLASS( \
+ input_file = os.path.join(self.raw_videos_dir, input_video), \
+ name = video_name, prog_bin = config.TRANSCODER_BIN)
+ transcoder.dest_path = self.transcoded_videos_dir
+
+ # Transcode the raw video in each requested format.
+ # TODO report partial errors
+ for transcode_config in transcode_configs:
+ transcode_config['output_file'] = \
+ transcoder.transcode(**transcode_config)
+
+ print '** Transcoding finished.'
+
+ def extract_thumbs(self, input_video, video_name, thumbs):
+ """
+ Extracts thumbnail images from a video.
+
+ @param input_video input video file name
+ @param video_name a video name which must be a valid file name
+ @param thumbs use 'random' to extract a thumbnail image from a random
+ point of the video or use a positive integer n to extract n summary
+ thumbnail
+ """
+
+ # TODO report partial errors
+ thumb_extractor = config.THUMB_EXTRACTOR_CLASS( \
+ input_file = os.path.join(self.raw_videos_dir, input_video), \
+ name = video_name, \
+ prog_bin = config.THUMB_EXTRACTOR_BIN)
+ thumb_extractor.dest_path = self.thumbs_dir
+ if thumbs == 'random':
+ thumb_extractor.extract_random_thumb()
+ elif type(thumbs) is int and thumbs > 0:
+ thumb_extractor.extract_summary_thumbs(thumbs)
+
+ print '** Extracting thumbs finished.'
+
+ def seed(self, transcode_configs):
+ """
+ Creates torrents from the videos passed and then stats seeding them.
+
+ @param transcode_configs a list of dictionaries with format settings
+ """
+
+ for transcode_config in transcode_configs:
+ # * CREATE TORRENTS FOR EACH TRANSCODED VIDEO
+ # Create torrent file.
+ bt.create_torrent(transcode_config['output_file'])
+
+ # The torrent file is created in the same directory with the
+ # source file. Move it to the torrents directory.
+ shutil.move(transcode_config['output_file'] + '.tstream', \
+ self.torrents_dir)
+
+ output_file = transcode_config['output_file'] + '.tstream'
+ output_file = output_file[(output_file.rindex('/') + 1):]
+
+ # * SEED TORRENTS
+ bit_torrent.start_download( \
+ os.path.join(self.torrents_dir, output_file),
+ self.transcoded_videos_dir)
+
+ print '** Creating torrents and seeding finished.'
+
+ def transfer_out(self, local_files, local_path, remote_path):
+ """
+ Transfers some local files to a remote path of the Web Server.
+
+ @param local_files list local files to transfer
+ @param remote_path destination path on the Web Server
+ """
+
+ file_transfer = config.FILE_TRANSFERER_CLASS( \
+ local_path, remote_path)
+ file_transfer.put(local_files)
+ file_transfer.close()
+
+ print '** Creating torrents and seeding finished.'
+
+ def remove_files(self, files, path):
+ """
+ Deletes files from a specified path.
+ """
+
+ for f in files:
+ os.unlink(os.path.join(path, f))
+
+ print '** Cleaning up finished.'
+
+ def run(self):
+ while True:
+ job = self.shared.queue.get()
+
+ # * TRANSFER RAW VIDEO IN
+ self.transfer_in(job['raw_video'])
+
+ # * TRANSCODE RAW VIDEO
+ self.transcode(job['raw_video'], job['name'], \
+ job['transcode_configs'])
+
+ # * EXTRACT THUMBNAIL IMAGES
+ if job['thumbs'] != 0:
+ self.extract_thumbs(job['raw_video'], job['name'], \
+ job['thumbs'])
+
+ # * CREATE TORRENTS AND START SEEDING OF TRANSCODED VIDEOS
+ self.seed(job['transcode_configs'])
+
+ # Torrent files.
+ files = [f for f in os.listdir(self.torrents_dir) \
+ if os.path.isfile(os.path.join( \
+ self.torrents_dir, f))]
+ torrent_files = fnmatch.filter(files, job['name'] + "_*")
+
+ # Thumbnail images files.
+ files = [f for f in os.listdir(self.thumbs_dir) \
+ if os.path.isfile(os.path.join( \
+ self.thumbs_dir, f))]
+ thumb_files = fnmatch.filter(files, job['name'] + "_*")
+
+ # Raw video files.
+ raw_files = [f for f in os.listdir(self.raw_videos_dir) \
+ if os.path.isfile(os.path.join( \
+ self.raw_videos_dir, f))]
+
+ # * TRANSFER TORRENTS AND THUMBNAIL IMAGES OUT
+ self.transfer_out(torrent_files, self.torrents_dir, \
+ config.OUTPUT_TORRENTS_PATH)
+ self.transfer_out(thumb_files, self.thumbs_dir, \
+ config.OUTPUT_THUMBS_PATH)
+
+ # * CLEANUP RAW VIDEOS AND THUMBNAIL IMAGES
+ self.remove_files(raw_files, self.raw_videos_dir)
+ self.remove_files(thumb_files, self.thumbs_dir)
+
+ # * JOB FINISHED
+ self.shared.queue.task_done()
+ print 'load in run is', self.shared.load
+ self.shared.load -= job['weight']
+
+class Shared:
+ """
+ Shared data between Service (front-end) and CIWorker (back-end).
+
+ @member queue a list of dictionaries with the following keys:
+ <ul>
+ <li>raw_video</li>
+ <li>name: a video name which must be a valid file name</li>
+ <li>transcode_configs: a list of transcode configuration
+ dictionaries having the keys as the parameters of
+ api.BaseTranscoder.transcode(...)</li>
+ <li>thumbs: string 'random' for extracting a thumbnail
+ image from a random video position or a positive integer which
+ represents the number of summary thumbnails to be extracted</li>
+ </ul>
+ @member load total weight of the jobs from the queue
+ """
+
+ def __init__(self):
+ # Jobs queue.
+ self.queue = Queue()
+
+ # Sever load.
+ self.load = 0
+
+
+class Service:
+ """
+ Implementation of the RESTful web service which constitutes the interface
+ with the client (web server).
+ """
+
+ def __init__(self):
+ # Shared data with back-end (CIWorker).
+ self.shared = Shared()
+
+ global bit_torrent
+
+ # Worker thread.
+ ci_worker = CIWorker(self.shared, bit_torrent)
+ ci_worker.daemon = True
+ ci_worker.start()
+
+ def __del__(self):
+ self.shared.queue.join()
-# thumb_extractor = config.THUMB_EXTRACTOR_CLASS(sys.argv[1])
-# #print thumb_extractor.get_video_duration()
-# #thumb_extractor.extract_random_thumb()
-# print thumb_extractor.extract_summary_thumbs(5)
-
- file_transfer = config.FILE_TRANSFERER_CLASS()
- file_transfer.get(['vim_config.tar.gz'])
- file_transfer.close()
+ def GET(self, request):
+ #web.header('Cache-Control', 'no-cache')
+
+ if request == 'get_load':
+ resp = {"load": self.shared.load}
+ print 'load in GET is', self.shared.load
+ web.header('Content-Type', 'application/json')
+ return json.dumps(resp)
+ else:
+ web.badrequest()
+ return ""
+
+
+ def POST(self, request):
+ if request == 'ingest_content':
+ # Read JSON parameters.
+ json_data = web.data()
+ data = json.loads(json_data)
+
+ # Add job weight to CIS load.
+ self.shared.load += data["weight"]
+ print 'load in POST is', self.shared.load
+
+ # Submit job.
+ self.shared.queue.put(data)
+
+ return 'Job submitted.'
+ else:
+ web.badrequest()
+ return ""
+
+
+if __name__ == '__main__':
+ # The BitTorrent object implements a NextShare (Tribler) BitTorrent
+ # client for seeding, downloading etc.
+ global bit_torrent
+ bit_torrent = bt.BitTorrent()
+
+ # Web service.
+ urls = ('/(.*)', 'Service')
+ service = web.application(urls, globals())
+ service.run()
projects / living-lab-site.git / blobdiff