path: root/voctocore/lib/commands.py

#!/usr/bin/python3
import logging
import json

from lib.config import Config
from lib.videomix import CompositeModes
from lib.response import NotifyResponse, OkResponse

def decodeName(items, name_or_id):
    try:
        name_or_id = int(name_or_id)
        if name_or_id < 0 or name_or_id >= len(items):
            raise IndexError("unknown index %d" % name_or_id)

        return name_or_id

    except ValueError as e:
        try:
            return items.index(name_or_id)

        except ValueError as e:
            raise IndexError("unknown name %s" % name_or_id)

def decodeEnumName(enum, name_or_id):
    try:
        name_or_id = int(name_or_id)
        if name_or_id < 0 or name_or_id >= len(enum):
            raise IndexError("unknown index %d" % name_or_id)

        return name_or_id

    except ValueError as e:
        try:
            return enum[name_or_id]

        except KeyError as e:
            raise IndexError("unknown name %s" % name_or_id)

def encodeName(items, id):
    try:
        return items[id]
    except IndexError as e:
        raise IndexError("unknown index %d" % id)

def encodeEnumName(enum, id):
    try:
        return enum(id).name
    except ValueError as e:
        raise IndexError("unknown index %d" % id)

class ControlServerCommands(object):
    def __init__(self, pipeline):
        self.log = logging.getLogger('ControlServerCommands')

        self.pipeline = pipeline

        self.sources = Config.getlist('mix', 'sources')
        self.blankerSources = Config.getlist('stream-blanker', 'sources')

    # Commands are defined below. Errors are sent to the clients by throwing
    # exceptions, they will be turned into messages outside.

    def message(self, *args):
        return NotifyResponse('message', *args)


    def _get_video_status(self):
        a = encodeName( self.sources, self.pipeline.vmix.getVideoSourceA() )
        b = encodeName( self.sources, self.pipeline.vmix.getVideoSourceB() )
        return [a, b]

    def get_video(self):
        status = self._get_video_status()
        return OkResponse('video_status', *status)

    def set_video_a(self, src_name_or_id):
        src_id = decodeName(self.sources, src_name_or_id)
        self.pipeline.vmix.setVideoSourceA(src_id)

        status = self._get_video_status()
        return NotifyResponse('video_status', *status)

    def set_video_b(self, src_name_or_id):
        src_id = decodeName(self.sources, src_name_or_id)
        self.pipeline.vmix.setVideoSourceB(src_id)

        status = self._get_video_status()
        return NotifyResponse('video_status', *status)


    def _get_audio_status(self):
        src_id = self.pipeline.amix.getAudioSource()
        return encodeName(self.sources, src_id)

    def get_audio(self):
        status = self._get_audio_status()
        return OkResponse('audio_status', status)

    def set_audio(self, src_name_or_id):
        src_id = decodeName(self.sources, src_name_or_id)
        self.pipeline.amix.setAudioSource(src_id)

        status = self._get_audio_status()
        return NotifyResponse('audio_status', status)


    def _get_composite_status(self):
        mode = self.pipeline.vmix.getCompositeMode()
        return encodeEnumName(CompositeModes, mode)

    def get_composite_mode(self):
        status = self._get_composite_status()
        return OkResponse('composite_mode', status)

    def set_composite_mode(self, mode_name_or_id):
        mode = decodeEnumName(CompositeModes, mode_name_or_id)
        self.pipeline.vmix.setCompositeMode(mode)

        status = self._get_composite_status()
        return NotifyResponse('composite_mode', status)


    def _get_stream_status(self):
        blankSource = self.pipeline.streamblanker.blankSource
        if blankSource is None:
            return ('live',)

        return 'blank', encodeName(self.blankerSources, blankSource)

    def get_stream_status(self):
        status = self._get_stream_status()
        return OkResponse('stream_status', *status)

    def set_stream_blank(self, source_name_or_id):
        src_id = decodeName(self.blankerSources, source_name_or_id)
        self.pipeline.streamblanker.setBlankSource(src_id)

        status = self._get_stream_status()
        return NotifyResponse('stream_status', *status)

    def set_stream_live(self):
        self.pipeline.streamblanker.setBlankSource(None)

        status = self._get_stream_status()
        return NotifyResponse('stream_status', *status)


    def get_config(self):
        confdict = {header: dict(section) for header, section in dict(Config).items()}
        return OkResponse('server_config', json.dumps(confdict))