player.py

import sys, platform, globalVars, os, re

def is64Bit():
    return sys.maxsize > 2 ** 32

#使用環境に応じて適切なdllをロード
if is64Bit():
    from pybass64 import pybass
    from pybass64 import bass_fx
else:
    from pybass import pybass
    from pybass import bass_fx
    from pybass import basshls


class player():
    def __init__ (self):
        # 必要な変数を生成
        self.fileName = 0
        self.handle = 0
        self.reverseHandle = 0
        self.moveTempo = -100.0
        self.rewindFlag = 0
        self.fastForwardFlag = 0
        self.handleVolume = 1.0
        self.changeVolume(globalVars.app.config.getint("volume", "default", default=100)) #音量読み込み
        self.channelTempo = 0.0
        self.channelPitch = 0
        self.channelFreq = 100
        #bass.dllの初期化
        pybass.BASS_Init(-1, 44100, pybass.BASS_DEVICE_CPSPEAKERS, 0, 0)
        pybass.BASS_SetConfig(pybass.BASS_CONFIG_BUFFER,150)
        #必要なプラグインを適用
        pybass.BASS_PluginLoad(b"basshls.dll", 0)

    def inputFile(self, fileName):
        # 以前のストリームがあればフリー
        if not(self.handle == 0 and self.reverseHandle == 0):
            self.channelFree()

        # ファイルが渡されたらファイルを登録してストリームを生成
        self.fileName = fileName
        self.handle, self.reverseHandle = self.createChannel()

        #早送りとかの設定をリフレッシュして再生
        self.refreshEffect()
        self.fastMoveReset()
        rtn = self.channelPlay()
        return rtn

    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 channelPlay(self):
        rtn = pybass.BASS_ChannelPlay(self.handle,False)
        # pybass.play_handle(self.handle, show_tags = True)
        return rtn

    def channelFree(self):
        pybass.BASS_StreamFree(self.reverseHandle)
        self.reverseHandle = 0
        pybass.BASS_StreamFree(self.handle)
        self.handle = 0
        self.fastMoveReset()
        self.fileName = 0

    def pauseChannel(self):
        return pybass.BASS_ChannelPause(self.handle)


    def getChannelState(self):
        bassCode = pybass.BASS_ChannelIsActive(self.handle)
        if bassCode == pybass.BASS_ACTIVE_PLAYING:
            return 0
        elif bassCode == pybass.BASS_ACTIVE_PAUSED:
            return 1
        elif bassCode == pybass.BASS_ACTIVE_PAUSED_DEVICE:
            return 4
        else:
            if self.handle == 0:
                return 3
            else:
                return 2

    def getChannelLength(self):
        byte = pybass.BASS_ChannelGetLength(self.handle,pybass.BASS_POS_BYTE)
        return pybass.BASS_ChannelBytes2Seconds(self.handle, byte)
    
    def restartDevice(self, device=-1): #オーディオデバイスを設定して再起動
        pos = self.getChannelPosition()
        pybass.BASS_Stop()
        # デバイスの再設定
        if pybass.BASS_Init(device, 44100, pybass.BASS_DEVICE_CPSPEAKERS, 0, 0) == False:
            c = 0
            for i in range(1, 100):
                if pybass.BASS_Init(i, 44100, pybass.BASS_DEVICE_CPSPEAKERS, 0, 0):
                    c = i
                    break
            pybass.BASS_SetDevice(c)
        else:
            pybass.BASS_SetDevice(device)
        self.inputFile(self.fileName)
        return self.setChannelPosition(pos)

    def getChannelPosition(self):
        channelPositionByte = pybass.BASS_ChannelGetPosition(self.handle, pybass.BASS_POS_BYTE)
        channelPositionSec = pybass.BASS_ChannelBytes2Seconds(self.handle, channelPositionByte)
        return channelPositionSec

    def setChannelPosition(self, sec):
        channelPositionByte = pybass.BASS_ChannelSeconds2Bytes(self.handle, sec)
        return pybass.BASS_ChannelSetPosition(self.handle, channelPositionByte, pybass.BASS_POS_BYTE)

    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 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()

    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)

    # 再生速度変更（速度%）
    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

    # 再生ピッチ変更（ピッチ-60..60）
    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

            # 再生周波数変更（周波数5..5000(%)）
    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 refreshEffect(self): # エフェクトリフレッシュ
        self.setTempo(self.channelTempo)
        self.setPitch(self.channelPitch)
        self.setFreq(self.channelFreq)

    # 音量変更（整数%）
    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 getVolume(self):
        return self.handleVolume*100

class state():
    PLAYING = 0
    PAUSED = 1
    STOPED = 2
    COLD = 3
    PAUSED_DEVICE = 4