#!/usr/bin/env python

__author__ = "Renato Filho"

__author_email__ = "renato.filho@indt.org.br"

__license__ = "GPL"

__version__ = "0.2"

import os

import sys

import shlex

import signal

import subprocess

import time

import select

import fcntl

import lib.utils as utils

import lib.server as server

import lib.transcoder as transcoder

__all__ = ("TranscoderGMencoder",)

class TranscoderGMencoder(transcoder.Transcoder):

    gmencoder_path = utils.which("gmencoder")

    name = "gmencoder"

    priority = -1

    proc = None

    def __init__(self, params):

        self.status = 0

        transcoder.Transcoder.__init__(self, params)

        self.opts = []

        self.opts.append (self.gmencoder_path)

        self.opts.append ("-d")

        self._parser_params ()

    # __init__()

    def _insert_param (self, name, value):

        if (value != ""):

            self.opts.append(name)

            self.opts.append(value)

    def _parser_params (self):

        self._insert_param("-i", \

            "%s://%s" % (self.params_first("type", "file"),

                         self.params_first("uri", "")))

        self._insert_param("--video-encode", self.params_first("ve", ""))

        self._insert_param("--video-opts", self.params_first ("video-opts", ""))

        self._insert_param("--video-fps", self.params_first("fps", ""))

        self._insert_param("--video-width", self.params_first("width", ""))

        self._insert_param("--video-height", self.params_first("height", ""))

        self._insert_param("--audio-encode", self.params_first("ae", ""))

        self._insert_param("--audio-opts", self.params_first ("audio-opts", ""))

        self._insert_param("--mux-element", self.params_first("mux", ""))

        self._insert_param("--audio-rate", self.params_first("audio-rate", ""))

    # _parse_params

    def start(self, outfd):

        outfile = self.params_first("outfile", "")

        if outfile != "":

            path = os.path.join(utils.config.get_transcoded_location(), outfile)

            self._insert_param("-o", "file://%s" % path)

        else:

            self._insert_param ("-o", "fd://%d" % outfd.fileno())

        cmd = " ".join(self.opts)

        self.log.info(self.tid, "GMencoder: %s" % cmd)

        try:

            self.proc = subprocess.Popen(self.opts, stdin=subprocess.PIPE,

                                         stdout=subprocess.PIPE)

            if outfile:

               outfd.write("OK   ")

        except Exception, e:

            self.log.error(self.tid, "Error: executing GMencoder: %s" % e)

            outfd.write("Error: GMencoder: %s" % e)

            return False

        try:

	    if not outfile:

	    	p = select.poll()

	    	p.register (outfd, select.POLLNVAL | select.POLLERR |

                            select.POLLHUP)

            tries = 0

            while (self.proc and self.proc.poll() == None):

                r, w, x = select.select([self.proc.stdout], [], [], 1)

                if self.proc.stdout in r:

                    progress = self.proc.stdout.readline()

                    if (progress.find ("PROGRESS") >= 0):

                        self.status = progress.split (":")[1]

		    elif (progress.find ("Erro") >= 0):

                        self.log.error(self.tid, "Detected problem @ gmencoder:"

                                       " %s" % progress)

                        if tries < 50:

                            tries += 1

                        else:

                            return False

		    if not outfile:

			    ret = p.poll(0)

			    if ret:

			    	self.log.info(self.tid, "* Lost connection *")

		    		self.stop ()

			    	return False

        except Exception, e:

            self.log.error(self.tid, "Problems handling data: %s" % e)

            return False

        self.status = 100;

        return True

    # start()

    def stop(self):

        if self.proc:

            self.log.info(self.tid, "Stopped GMencoder plugin")

            try:

                os.kill(self.proc.pid, signal.SIGKILL)

                self.proc.wait()

            except Exception, e:

                pass

            self.proc = None

    # stop()

    def get_progress(self):

        return self.status

    def get_lenght(self):

        return -1

# TranscoderGMencoder