author | Shane McErlean <shane.mcerlean@accenture.com> |
Fri, 27 Aug 2010 15:33:49 +0100 | |
changeset 101 | 1e82a8be084a |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
1
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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changeset
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1 |
Interface to CD-ROM player. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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2 |
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2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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3 |
This module implements an interface to the built-in cd module. The |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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4 |
intention is to provide a more user-friendly interface than the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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5 |
built-in module. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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6 |
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2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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7 |
The module defines a class Readcd with several methods. The |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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8 |
initialization of the class will try to open the CD player. This |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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9 |
means that initialization will fail if the CD player is already in |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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10 |
use. A RuntimeError will be raised by the cd module in that case. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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11 |
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2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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12 |
The way to work with this module is as follows. The user specifies |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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13 |
the parts of the CD that are to be read and he specifies callback |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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14 |
functions which are to be called by the system. At some point he can |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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15 |
tell the system to play. The specified parts of the CD will then be |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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16 |
read and the callbacks will be called. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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17 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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18 |
Initialization. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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19 |
=============== |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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20 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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21 |
r = readcd.Readcd([cd-player [, mode]]) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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22 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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23 |
The optional arguments are the name of the CD device and the mode. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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24 |
When "mode" is not specified, it defaults to 'r' (which is the only |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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25 |
possible value); when "cd-player" also isn't specified, it defaults |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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26 |
to "None" which indicates the default CD player. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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27 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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28 |
Methods. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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29 |
======== |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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30 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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31 |
eject() -- Eject the CD from the player. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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32 |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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33 |
reset() -- Reset the list of data stretches to be played. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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34 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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35 |
appendtrack(track) -- Append the specified track to the list of music |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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36 |
stretches. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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37 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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38 |
appendstretch(first, last) -- Append the stretch from "first" to "last" |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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39 |
to the list of music stretches. Both "first" and "last" can be in one |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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40 |
of four forms. "None": for "first", the beginning of the CD, for |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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41 |
"last" the end of the CD; a single integer: a track number--playing |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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42 |
starts at the beginning of the track or ends at the end of the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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43 |
specified track; a three-tuple: the absolute time from the start of |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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44 |
the CD in minutes, seconds, frames; a four-tuple: track number and |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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45 |
relative time within the track in minutes, seconds, frames. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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46 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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47 |
settracks(tracklist) -- The argument is a list of integers. The list |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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48 |
of stretches is set to argument list. The old list is discarded. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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49 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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50 |
setcallback(type, func, arg) -- Set a callback function for "type". |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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51 |
The function will be called as func(arg, type, data) where "arg" is |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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52 |
the third argument of setcallback, "type" is the type of callback, |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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53 |
"data" is type-dependent data. See the CDsetcallback(3) manual page |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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54 |
for more information. The possible "type" arguments are defined in |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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55 |
the CD module. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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56 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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57 |
removecallback(type) -- Remove the callback for "type". |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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58 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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59 |
gettrackinfo([tracklist]) -- Return a list of tuples. Each tuple |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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60 |
consists of start and length information of a track. The start and |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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61 |
length information consist of three-tuples with minutes, seconds and |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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62 |
frames. The optional tracklist argument gives a list of interesting |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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63 |
track numbers. If no tracklist is specified, information about all |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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64 |
tracks is returned. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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65 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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66 |
getstatus() -- Return the status information of the CD. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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67 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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68 |
play() -- Play the preprogrammed stretches of music from the CD. When |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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69 |
nothing was programmed, the whole CD is played. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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70 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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71 |
Specifying stretches. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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72 |
===================== |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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73 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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74 |
There are three methods available to specify a stretch of music to be |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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75 |
played. The easiest way is to use "settracklist(tracklist)" with which |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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76 |
a list of tracks can be specified. "settracklist(tracklist)" is |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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77 |
equivalent to the sequence |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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78 |
reset() |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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79 |
for track in tracklist: |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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80 |
appendtrack(track) |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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81 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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82 |
The next method is "appendtrack(track)" with which a whole track can be |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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83 |
added to the list of music to be played. "appendtrack(track)" is |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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84 |
equivalent to "appendstretch(track, track)". |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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85 |
|
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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86 |
The most complete method is "appendstretch(first, last)". Using this |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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87 |
method, it is possible to specify any stretch of music. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
diff
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88 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
89 |
When two consecutive tracks are played, it is possible to choose |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
90 |
whether the pause that may be between the tracks is played as well or |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
91 |
whether the pause should be skipped. When the end of a stretch is |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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92 |
specified using a track number and the next stretch starts at the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
93 |
beginning of the following track and that was also specified using the |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
94 |
track number (that is, both were specified as integers, not as tuples), |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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|
95 |
the pause is played. When either value was specified using absolute |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
96 |
time or track-relative time (that is, as three-tuple or as |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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97 |
four-tuple), the pause will not be played. |
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
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98 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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99 |
Errors. |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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100 |
======= |
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Initial QEMU (symbian-qemu-0.9.1-12) import
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parents:
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101 |
|
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Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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102 |
When an error occurs, an exception will be raised. Depending on where |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
diff
changeset
|
103 |
the error occurs, the exception may either be "readcd.Error" or |
2fb8b9db1c86
Initial QEMU (symbian-qemu-0.9.1-12) import
martin.trojer@nokia.com
parents:
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104 |
"RuntimeError". |