def createChannel(self):
#ファイルを読み込み、ストリームを生成
if os.path.isfile(self.fileName):
handle = pybass.BASS_StreamCreateFile(
False, self.fileName, 0, 0, pybass.BASS_UNICODE
| pybass.BASS_STREAM_PRESCAN | pybass.BASS_STREAM_DECODE)
#逆再生用のストリームを生成。さっきのhandleはこれと同時にfreeする
reverseHandle = bass_fx.BASS_FX_ReverseCreate(
handle, 0.3,
bass_fx.BASS_FX_FREESOURCE | pybass.BASS_STREAM_DECODE)
#再生速度をコントロールするストリームを生成。
handle = bass_fx.BASS_FX_TempoCreate(
reverseHandle, 0) #bass_fx.BASS_FX_FREESOURCEしない
#再生の向きを元の方向に設定
pybass.BASS_ChannelSetAttribute(reverseHandle,
bass_fx.BASS_ATTRIB_REVERSE_DIR,
bass_fx.BASS_FX_RVS_FORWARD)
elif re.search("https?://.+\..+", self.fileName) != None:
handle = pybass.BASS_StreamCreateURL(self.fileName.encode(), 0, 0,
0, 0)
reverseHandle = 0
else:
handle = 0
reverseHandle = 0
#再生ボリュームを初期設定
pybass.BASS_ChannelSetAttribute(handle, pybass.BASS_ATTRIB_VOL,
self.handleVolume)
#2つのhandleを返す
return handle, reverseHandle
def fastMoveReset(self):
self.moveTempo = 100.0
self.rewindFlag = 0
self.fastForwardFlag = 0
pybass.BASS_ChannelSetAttribute(self.handle, bass_fx.BASS_ATTRIB_TEMPO,
self.channelTempo)
pybass.BASS_ChannelSetAttribute(self.reverseHandle,
bass_fx.BASS_ATTRIB_REVERSE_DIR,
bass_fx.BASS_FX_RVS_FORWARD)
pybass.BASS_ChannelUpdate(self.handle, 0)
def rewind(self):
if self.fastForwardFlag == 0 and pybass.BASS_ChannelIsActive(
self.handle) == pybass.BASS_ACTIVE_PLAYING:
if pybass.BASS_ChannelSetAttribute(self.reverseHandle,
bass_fx.BASS_ATTRIB_REVERSE_DIR,
bass_fx.BASS_FX_RVS_REVERSE):
self.rewindFlag = 1
if self.moveTempo < 500.0:
self.moveTempo += 50.0
pybass.BASS_ChannelSetAttribute(self.handle,
bass_fx.BASS_ATTRIB_TEMPO,
self.moveTempo)
elif self.fastForwardFlag == 1 and pybass.BASS_ChannelIsActive(
self.handle) == pybass.BASS_ACTIVE_PLAYING:
self.fastMoveReset()
def changeVolume(self, num):
if num < 0 or num > 200:
return
num = num / 100
self.handleVolume = num
pybass.BASS_ChannelSetAttribute(self.handle, pybass.BASS_ATTRIB_VOL,
self.handleVolume)
def setPitch(self, pitch):
self.channelPitch = pitch
rtn = False
if pitch >= -60 and pitch <= 60:
if pybass.BASS_ChannelSetAttribute(self.handle,
bass_fx.BASS_ATTRIB_TEMPO_PITCH,
pitch):
rtn = True
return rtn
def setTempo(self, tempo):
self.channelTempo = tempo
rtn = False
if tempo >= -95 and tempo <= 5000:
if pybass.BASS_ChannelSetAttribute(self.handle,
bass_fx.BASS_ATTRIB_TEMPO,
tempo):
rtn = True
return rtn
def setFreq(self, freq):
self.channelFreq = freq
rtn = False
if freq >= 5 and freq <= 5000:
# パーセントから周波数に変換
freqHz = 44100 * (freq / 100)
if pybass.BASS_ChannelSetAttribute(self.handle,
bass_fx.BASS_ATTRIB_TEMPO_FREQ,
freqHz):
rtn = True
return rtn
def fastForward(self):
if self.rewindFlag == 0 and self.moveTempo < 500.0 and pybass.BASS_ChannelIsActive(
self.handle) == pybass.BASS_ACTIVE_PLAYING:
self.moveTempo += 50.0
if pybass.BASS_ChannelSetAttribute(self.handle,
bass_fx.BASS_ATTRIB_TEMPO,
self.moveTempo):
self.fastForwardFlag = 1
else:
self.moveTempo = 0.0
elif self.rewindFlag == 1 and pybass.BASS_ChannelIsActive(
self.handle) == pybass.BASS_ACTIVE_PLAYING:
self.fastMoveReset()
