#!/usr/bin/env python
# Drive a Sony Laserdisc player.
# Adam Sampson <ats@offog.org>

# FIXME: This should also have a "read from ircat" mode.

import sys, serial

# All the codes are taken from the LDP-1450 manual, which claims to work for
# the LDP-2000/1500/1500P/1550/1550P/1600P/1450/3300P/3600D. Mine's a 3600D.

commands = {
	"audio_mute_on": 0x25,
	"audio_mute_off": 0x24,
	"ce": 0x41, # clear entry
	"ch1_on": 0x46,
	"ch1_off": 0x47,
	"ch2_on": 0x48,
	"ch2_off": 0x49,
	"chapter_mode": 0x69,
	"ca": 0x56, # clear all
	"continue": 0x61, # after still
	"cx_on": 0x6E,
	"cx_off": 0x6F,
	"eject": 0x2A,
	"eject_enable": 0x74,
	"eject_disable": 0x75,
	"enter": 0x40,
	"f_fast": 0x3B,
	"r_fast": 0x4B,
	"f_play": 0x3A,
	"r_play": 0x4A,
	"f_scan": 0x3E,
	"r_scan": 0x4E,
	"f_slow": 0x3C,
	"r_slow": 0x4C,
	"f_step": 0x3D,
	"r_step": 0x4D,
	"fwd_relative_search": 0x2D, # not LDP-2000/1550/1550P/1600P
	"rev_relative_search": 0x2E, # not LDP-2000/1550/1550P/1600P
	"fwd_step_and_still": 0x2B,
	"rev_step_and_still": 0x2C,
	"fwd_track_jump": 0x2D, # LDP-1550/1550P/1600P
	"rev_track_jump": 0x2E, # LDP-1550/1550P/1600P
	"frame_mode": 0x55,
	"index_on": 0x50,
	"index_off": 0x51,
	"mark_set": 0x73,
	"m_search": 0x58,
	"memory": 0x5A,
	"menu": 0x42,
	"motor_off": 0x63,
	"motor_on": 0x62,
	"non_cf_play": 0x71, # "disengage color framing"
	"psc_enable": 0x28, # enable picture stop code
	"psc_disable": 0x29,
	"repeat": 0x44,
	"search": 0x43,
	"still": 0x4F,
	"stop": 0x3F,
	"user_index_control": 0x80,
	"user_index_on": 0x81,
	"user_index_off": 0x82,
	"video_on": 0x27,
	"video_off": 0x26,

	"0": 0x30,
	"1": 0x31,
	"2": 0x32,
	"3": 0x33,
	"4": 0x34,
	"5": 0x35,
	"6": 0x36,
	"7": 0x37,
	"8": 0x38,
	"9": 0x39,

	"addr_inq": 0x60,
	"chapter_inq": 0x76,
	"rom_version_inq": 0x72,
	"status_inq": 0x67,
	"users_code_inq": 0x79,
	}

responses = {
	0x01: "completion",
	0x02: "error",
	0x03: "lip open",
	0x05: "no target", # target not found
	0x06: "no frame number", # target number illegal
	0x07: "mark return", # mark position has been found
	0x0A: "ack",
	0x0B: "nak",
	}

def open_player():
	return serial.Serial("/dev/ttyS0", 9600, rtscts = 0, dsrdtr = 1)

def send_cmd(ser, cmd):
	if not cmd in commands:
		print "Unknown command: %s" % cmd
		sys.exit(1)
	ser.write(chr(commands[cmd]))
	code = ord(ser.read(1))
	if not code in responses:
		print "Received unknown response from player: 0x%02X" % code
		return
	resp = responses[code]
	if resp != "ack":
		print "Got unexpected response from player: %s" % resp

if __name__ == "__main__":
	ser = open_player()
	for arg in sys.argv[1:]:
		send_cmd(ser, arg)