Carla/data/carla-single

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# Script to start carla plugin bridges
# Copyright (C) 2015 Filipe Coelho <falktx@falktx.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# For a full copy of the GNU General Public License see the doc/GPL.txt file.

# --------------------------------------------------------------------------------------------------------
# Imports

import os
import sys
from signal import signal, SIGINT, SIGTERM
from subprocess import Popen

# --------------------------------------------------------------------------------------------------------
# Setup

INSTALL_PREFIX = "X-PREFIX-X"

CARLA_LIBDIR = os.path.join(INSTALL_PREFIX, "lib", "carla")
CARLA_RESDIR = os.path.join(INSTALL_PREFIX, "share", "carla", "resources")

# --------------------------------------------------------------------------------------------------------
# Check for enough arguments

usageMsg = """\
usage: %s [arch (optional)] [format] [filename/uri] [label (optional)] [uniqueId (optional)]

Possible archs:
  - native (default)
  - linux32
  - linux64
  - win32
  - win64

Possible formats:
  - internal
  - ladspa
  - dssi
  - lv2
  - vst|vst2
  - vst3
  - gig
  - sf2
  - sfz

Examples:
$ %s internal midisplit
$ %s dssi /usr/lib/dssi/hexter.so hexter
$ %s lv2 http://calf.sourceforge.net/plugins/Compressor
$ %s native vst /usr/lib/vst/TAL-NoiseMaker.so
$ %s win32 vst \"~/.wine/drive_c/Program Files (x86)/VstPlugins/Kontakt 5.dll\"

Format can be skipped for internal and lv2 plugins (auto-detected), like this:
$ %s nekofilter
$ %s http://synthv1.sourceforge.net/lv2""" % ((sys.argv[0],)*8)

def printUsageAndQuit():
    print(usageMsg)
    sys.exit(0)

if len(sys.argv) < 2:
    printUsageAndQuit()

# --------------------------------------------------------------------------------------------------------
# Initialize variables to null

ARCH     = "native"
FORMAT   = "none"
FILENAME = ""
LABEL    = ""
UNIQUEID = 0

# --------------------------------------------------------------------------------------------------------
# Set arch

arg = 1

if sys.argv[arg] in ("native", "posix32", "posix64", "linux32", "linux64", "mac32", "mac64", "win32", "win64"):
    ARCH = sys.argv[arg].replace("linux", "posix").replace("mac", "posix")
    arg += 1

if len(sys.argv) == arg:
    printUsageAndQuit()

# --------------------------------------------------------------------------------------------------------
# Set format

if sys.argv[arg] in ("internal", "ladspa", "dssi", "lv2", "vst", "vst2", "vst3", "au", "audiounit", "gig", "sf2", "sfz"):
    FORMAT = sys.argv[arg]
    arg += 1

    if FORMAT == "vst":
        FORMAT = "vst2"
    elif FORMAT == "audiounit":
        FORMAT = "au"

elif len(sys.argv) == arg+1:
    FORMAT = "lv2" if ":" in sys.argv[arg] else "internal"

else:
    print("Invalid format")
    sys.exit(1)

if len(sys.argv) == arg:
    printUsageAndQuit()

# --------------------------------------------------------------------------------------------------------
# Set filename/uri

if FORMAT in ("internal", "lv2"):
    LABEL = sys.argv[arg]
    arg += 1

else:
    FILENAME = os.path.expanduser(sys.argv[arg])
    arg += 1

# --------------------------------------------------------------------------------------------------------
# Set label (optional)

if len(sys.argv) > arg:
    if FORMAT in ("internal", "lv2"):
        print("label/uri already set, ignoring 2nd label")
    else:
        LABEL = sys.argv[arg]
    arg += 1

# --------------------------------------------------------------------------------------------------------
# Set uniqueId (optional)

if len(sys.argv) > arg:
    if FORMAT in ("internal", "dssi", "lv2", "au", "gig", "sf2", "sfz"):
        print("uniqueId is not used in this format, ignored")
    else:
        try:
            UNIQUEID = int(sys.argv[arg])
        except:
            print("uniqueId must be a number")
            sys.exit(1)
    arg += 1

# --------------------------------------------------------------------------------------------------------
# Others?

if len(sys.argv) > arg:
    print("Got too many arguments, ignoring past uniqueId")

# --------------------------------------------------------------------------------------------------------
# Set bridge binary

BRIDGE = os.path.join(CARLA_LIBDIR, "carla-bridge-" + ARCH)

if ARCH in ("win32", "win64"):
    BRIDGE = BRIDGE + ".exe"

# --------------------------------------------------------------------------------------------------------
# Check for existing carla folder

if not os.path.exists(CARLA_LIBDIR):
    print("Carla library folder does not exist, is it installed?")
    sys.exit(2)

if not os.path.exists(CARLA_RESDIR):
    print("Carla resource folder does not exist, is it installed?")
    sys.exit(2)

# --------------------------------------------------------------------------------------------------------
# Check for existing arch binary

if not os.path.exists(BRIDGE):
    print("Carla plugin bridge for the requested arch (%s) does not exist" % (ARCH,))
    sys.exit(2)

# --------------------------------------------------------------------------------------------------------
# Final checks

if ARCH not in ("native", "posix32", "posix64", "win32", "win64"):
    print("Invalid arch")
    sys.exit(1)

if FORMAT not in ("internal", "ladspa", "dssi", "lv2", "vst2", "vst3", "gig", "sf2", "sfz"):
    print("Invalid format")
    sys.exit(1)

if FILENAME and not os.path.exists(FILENAME):
    print("Requested filename does not exist")
    sys.exit(1)

# ------------------------------------------------------------------------------------------------------------
# Signal handler

global gProc
gProc = None

def signalHandler(sig, frame):
    global gProc

    if gProc is None:
        return

    if sig in (SIGINT, SIGTERM):
        gProc.kill()
        gProc = None

signal(SIGINT,  signalHandler)
signal(SIGTERM, signalHandler)

# --------------------------------------------------------------------------------------------------------
# Setup environment

#CARLA_CLIENT_NAME = os.getenv("CARLA_CLIENT_NAME", "(none)")

#os.environ["ENGINE_OPTION_UIS_ALWAYS_ON_TOP"]  = "false"
#os.environ["ENGINE_OPTION_MAX_PARAMETERS"]     = "200"
#os.environ["ENGINE_OPTION_UI_BRIDGES_TIMEOUT"] = "3000"

LADSPA_PATH = os.getenv("LADSPA_PATH")
DSSI_PATH   = os.getenv("DSSI_PATH")
LV2_PATH    = os.getenv("LV2_PATH")
VST2_PATH   = os.getenv("VST_PATH")
VST3_PATH   = os.getenv("VST3_PATH")
AU_PATH     = os.getenv("AU_PATH")
GIG_PATH    = os.getenv("GIG_PATH")
SF2_PATH    = os.getenv("SF2_PATH")
SFZ_PATH    = os.getenv("SFZ_PATH")

if LADSPA_PATH is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_LADSPA"] = LADSPA_PATH
if DSSI_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_DSSI"]   = DSSI_PATH
if LV2_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_LV2"]    = LV2_PATH
if VST2_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_VST2"]   = VST2_PATH
if VST3_PATH   is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_VST3"]   = VST3_PATH
if AU_PATH     is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_AU"]     = AU_PATH
if GIG_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_GIG"]    = GIG_PATH
if SF2_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_SF2"]    = SF2_PATH
if SFZ_PATH    is not None: os.environ["ENGINE_OPTION_PLUGIN_PATH_SFZ"]    = SFZ_PATH

os.environ["ENGINE_OPTION_PATH_BINARIES"]  = CARLA_LIBDIR
os.environ["ENGINE_OPTION_PATH_RESOURCES"] = CARLA_RESDIR

# --------------------------------------------------------------------------------------------------------
# Exec

command = []

if ARCH in ("win32", "win64"):
    command.append("wine")

command.append(BRIDGE)
command.append(FORMAT)
command.append(FILENAME or "(none)")
command.append(LABEL or "(none)")
command.append(str(UNIQUEID))

print(command)

gProc = Popen(command)
gProc.wait()

# --------------------------------------------------------------------------------------------------------