| 1 | # Module to handle sound playback
|
|---|
| 2 |
|
|---|
| 3 | #------------------------------------------------------------------------------
|
|---|
| 4 |
|
|---|
| 5 | import os
|
|---|
| 6 | import traceback
|
|---|
| 7 |
|
|---|
| 8 | #------------------------------------------------------------------------------
|
|---|
| 9 |
|
|---|
| 10 | if os.name=="nt":
|
|---|
| 11 | import time
|
|---|
| 12 | import threading
|
|---|
| 13 | from ctypes import windll, c_buffer
|
|---|
| 14 |
|
|---|
| 15 | class MCIException(Exception):
|
|---|
| 16 | """MCI exception."""
|
|---|
| 17 | def __init__(self, mci, command, errorCode):
|
|---|
| 18 | """Construct an MCI exception for the given error code."""
|
|---|
| 19 | message = "MCI error: %s: %s" % (command, mci.getErrorString(errorCode))
|
|---|
| 20 | super(MCIException, self).__init__(message)
|
|---|
| 21 |
|
|---|
| 22 | class MCI:
|
|---|
| 23 | """Interface for the Media Control Interface."""
|
|---|
| 24 | def __init__(self):
|
|---|
| 25 | """Construct the interface."""
|
|---|
| 26 | self.w32mci = windll.winmm.mciSendStringA
|
|---|
| 27 | self.w32mcierror = windll.winmm.mciGetErrorStringA
|
|---|
| 28 |
|
|---|
| 29 | def send(self, command):
|
|---|
| 30 | """Send the given command to the MCI."""
|
|---|
| 31 | buffer = c_buffer(255)
|
|---|
| 32 | errorCode = self.w32mci(str(command), buffer, 254, 0)
|
|---|
| 33 | if errorCode:
|
|---|
| 34 | raise MCIException(self, command, errorCode)
|
|---|
| 35 | else:
|
|---|
| 36 | return buffer.value
|
|---|
| 37 |
|
|---|
| 38 | def getErrorString(self, errorCode):
|
|---|
| 39 | """Get the string representation of the given error code."""
|
|---|
| 40 | buffer = c_buffer(255)
|
|---|
| 41 | self.w32mcierror(int(errorCode), buffer, 254)
|
|---|
| 42 | return buffer.value
|
|---|
| 43 |
|
|---|
| 44 | class SoundThread(threading.Thread):
|
|---|
| 45 | """The thread controlling the playback of sounds."""
|
|---|
| 46 | def __init__(self, soundsDirectory):
|
|---|
| 47 | threading.Thread.__init__(self)
|
|---|
| 48 |
|
|---|
| 49 | self._soundsDirectory = soundsDirectory
|
|---|
| 50 | self._mci = MCI()
|
|---|
| 51 |
|
|---|
| 52 | self._requestCondition = threading.Condition()
|
|---|
| 53 | self._requests = []
|
|---|
| 54 | self._pending = []
|
|---|
| 55 | self._count = 0
|
|---|
| 56 |
|
|---|
| 57 | self.daemon = True
|
|---|
| 58 |
|
|---|
| 59 | def requestSound(self, name, finishCallback = None, extra = None):
|
|---|
| 60 | """Request the playback of the sound with the given name."""
|
|---|
| 61 | path = os.path.join(self._soundsDirectory, name)
|
|---|
| 62 | with self._requestCondition:
|
|---|
| 63 | self._requests.append((path, (finishCallback, extra)))
|
|---|
| 64 | self._requestCondition.notify()
|
|---|
| 65 |
|
|---|
| 66 | def run(self):
|
|---|
| 67 | """Perform the operation of the thread.
|
|---|
| 68 |
|
|---|
| 69 | It waits for a request or a timeout. If a request is received, that
|
|---|
| 70 | is started to be played back. If a timeout occurs, the file is
|
|---|
| 71 | closed."""
|
|---|
| 72 |
|
|---|
| 73 | while True:
|
|---|
| 74 | with self._requestCondition:
|
|---|
| 75 | if not self._requests:
|
|---|
| 76 | if self._pending:
|
|---|
| 77 | timeout = max(time.time() - self._pending[0][0],
|
|---|
| 78 | 0.0)
|
|---|
| 79 | else:
|
|---|
| 80 | timeout = 10.0
|
|---|
| 81 |
|
|---|
| 82 | self._requestCondition.wait(timeout)
|
|---|
| 83 |
|
|---|
| 84 | requests = []
|
|---|
| 85 | for (path, finishData) in self._requests:
|
|---|
| 86 | requests.append((path, finishData, self._count))
|
|---|
| 87 | self._count += 1
|
|---|
| 88 | self._requests = []
|
|---|
| 89 |
|
|---|
| 90 | now = time.time()
|
|---|
| 91 | toClose = []
|
|---|
| 92 | while self._pending and \
|
|---|
| 93 | self._pending[0][0]<=now:
|
|---|
| 94 | toClose.append(self._pending[0][1])
|
|---|
| 95 | del self._pending[0]
|
|---|
| 96 |
|
|---|
| 97 | for (alias, (finishCallback, extra)) in toClose:
|
|---|
| 98 | success = True
|
|---|
| 99 | try:
|
|---|
| 100 | print "Closing", alias
|
|---|
| 101 | self._mci.send("close " + alias)
|
|---|
| 102 | print "Closed", alias
|
|---|
| 103 | except Exception, e:
|
|---|
| 104 | print "Failed closing " + alias + ":", str(e)
|
|---|
| 105 | success = False
|
|---|
| 106 |
|
|---|
| 107 | if finishCallback is not None:
|
|---|
| 108 | try:
|
|---|
| 109 | finishCallback(success, extra)
|
|---|
| 110 | except:
|
|---|
| 111 | traceback.print_exc()
|
|---|
| 112 |
|
|---|
| 113 | for (path, finishData, counter) in requests:
|
|---|
| 114 | try:
|
|---|
| 115 | alias = "mlxsound%d" % (counter,)
|
|---|
| 116 | print "Starting to play", path, "as", alias
|
|---|
| 117 | self._mci.send("open \"%s\" alias %s" % \
|
|---|
| 118 | (path, alias))
|
|---|
| 119 | self._mci.send("set %s time format milliseconds" % \
|
|---|
| 120 | (alias,))
|
|---|
| 121 | lengthBuffer = self._mci.send("status %s length" % \
|
|---|
| 122 | (alias,))
|
|---|
| 123 | self._mci.send("play %s from 0 to %s" % \
|
|---|
| 124 | (alias, lengthBuffer))
|
|---|
| 125 | length = int(lengthBuffer)
|
|---|
| 126 | timeout = time.time() + length / 1000.0
|
|---|
| 127 | with self._requestCondition:
|
|---|
| 128 | self._pending.append((timeout, (alias, finishData)))
|
|---|
| 129 | self._pending.sort()
|
|---|
| 130 | print "Started to play", path
|
|---|
| 131 | except Exception, e:
|
|---|
| 132 | print "Failed to start playing " + path + ":", str(e)
|
|---|
| 133 | (finishCallback, extra) = finishData
|
|---|
| 134 | if finishCallback is not None:
|
|---|
| 135 | try:
|
|---|
| 136 | finishCallback(None, extra)
|
|---|
| 137 | except:
|
|---|
| 138 | traceback.print_exc()
|
|---|
| 139 |
|
|---|
| 140 | _thread = None
|
|---|
| 141 |
|
|---|
| 142 | def initializeSound(soundsDirectory):
|
|---|
| 143 | """Initialize the sound handling with the given directory containing
|
|---|
| 144 | the sound files."""
|
|---|
| 145 | global _thread
|
|---|
| 146 | _thread = SoundThread(soundsDirectory)
|
|---|
| 147 | _thread.start()
|
|---|
| 148 |
|
|---|
| 149 | def startSound(name, finishCallback = None, extra = None):
|
|---|
| 150 | """Start playing back the given sound.
|
|---|
| 151 |
|
|---|
| 152 | name should be the name of a sound file relative to the sound directory
|
|---|
| 153 | given in initializeSound."""
|
|---|
| 154 | _thread.requestSound(name, finishCallback = finishCallback,
|
|---|
| 155 | extra = extra)
|
|---|
| 156 |
|
|---|
| 157 | #------------------------------------------------------------------------------
|
|---|
| 158 |
|
|---|
| 159 | else: # os.name!="nt"
|
|---|
| 160 | def initializeSound(soundsDirectory):
|
|---|
| 161 | """Initialize the sound handling with the given directory containing
|
|---|
| 162 | the sound files."""
|
|---|
| 163 | pass
|
|---|
| 164 |
|
|---|
| 165 | def startSound(name, finishCallback = None, extra = None):
|
|---|
| 166 | """Start playing back the given sound.
|
|---|
| 167 |
|
|---|
| 168 | FIXME: it does not do anything currently, but it should."""
|
|---|
| 169 | pass
|
|---|
| 170 |
|
|---|
| 171 | #------------------------------------------------------------------------------
|
|---|
| 172 | #------------------------------------------------------------------------------
|
|---|
| 173 |
|
|---|
| 174 | if __name__ == "__main__":
|
|---|
| 175 | def callback(result, extra):
|
|---|
| 176 | print "callback", result, extra
|
|---|
| 177 |
|
|---|
| 178 | initializeSound("e:\\home\\vi\\tmp")
|
|---|
| 179 | startSound("malev.mp3", finishCallback = callback, extra="malev.mp3")
|
|---|
| 180 | time.sleep(5)
|
|---|
| 181 | startSound("ding.wav", finishCallback = callback, extra="ding1.wav")
|
|---|
| 182 | time.sleep(5)
|
|---|
| 183 | startSound("ding.wav", finishCallback = callback, extra="ding2.wav")
|
|---|
| 184 | time.sleep(5)
|
|---|
| 185 | startSound("ding.wav", finishCallback = callback, extra="ding3.wav")
|
|---|
| 186 | time.sleep(50)
|
|---|
| 187 |
|
|---|
| 188 | #------------------------------------------------------------------------------
|
|---|
