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Text File  |  1996-06-16  |  2KB  |  87 lines
  1. *=======================================================
  2. *
  3. *    １６ｂｉｔＰＣＭ 3.9kHz変換
  4. *
  5. *=======================================================
  6.  
  7. PCM16_0104_mac    macro        _vol
  8.  
  9.         move.l        #MIX_SIZE-2,d6
  10.         add.l        a0,d6
  11.         cmp.l        a3,d6
  12.         bcs        @f            * 今回の処理中にはトラップしない
  13.  
  14.         moveq.l        #MIX_SIZE/2-1-1,d6
  15. 2:        cmpa.l        a3,a0            * トラップアドレス判定
  16.         bcs        1f
  17.         jsr        (a4)            * トラップ!
  18. 1:        move.w        (a0)+,d0        * PCMデータ取り込み
  19.         VOLUME        _vol,d0,d2
  20.         add.w        d0,(a1)+
  21.         add.w        d0,(a1)+
  22.         add.w        d0,(a1)+
  23.         add.w        d0,(a1)+
  24.         dbra        d6,2b
  25.  
  26. *        ラストの１回
  27.         cmpa.l        a3,a0
  28.         bcs        1f
  29.         jsr        (a4)            * トラップ!
  30. 1:        move.w        (a0)+,d0        * PCMデータ取り込み
  31.         move.w        d0,CH_LAST_PCM(a5)    * 前回変換終了時のPCM値 = d0.w
  32.         VOLUME        _vol,d0,d2
  33.         move.w        d0,CH_LAST_VPCM(a5)    * 最後のPCM値(音量変換後)
  34.         add.w        d0,(a1)+
  35.         add.w        d0,(a1)+
  36.         add.w        d0,(a1)+
  37.         add.w        d0,(a1)+
  38.  
  39.         move.l        a0,CH_PCM_ADR(a5)    * PCMアドレス = a0.l
  40.         rts
  41.  
  42.         * トラップ無し
  43. @@:        moveq.l        #MIX_SIZE/2-1-1,d6
  44. 2:        move.w        (a0)+,d0        * PCMデータ取り込み
  45.         VOLUME        _vol,d0,d2
  46.         add.w        d0,(a1)+
  47.         add.w        d0,(a1)+
  48.         add.w        d0,(a1)+
  49.         add.w        d0,(a1)+
  50.         dbra        d6,2b
  51.  
  52. *        ラストの１回
  53.         move.w        (a0)+,d0        * PCMデータ取り込み
  54.         move.w        d0,CH_LAST_PCM(a5)    * 前回変換終了時のPCM値 = d0.w
  55.         VOLUME        _vol,d0,d2
  56.         move.w        d0,CH_LAST_VPCM(a5)    * 最後のPCM値(音量変換後)
  57.         add.w        d0,(a1)+
  58.         add.w        d0,(a1)+
  59.         add.w        d0,(a1)+
  60.         add.w        d0,(a1)+
  61.  
  62.         move.l        a0,CH_PCM_ADR(a5)    * PCMアドレス = a0.l
  63.         rts
  64.  
  65.         endm
  66.  
  67. *=======================================================
  68.  
  69. PCM16_0104_v00:    PCM16_0104_mac    0
  70. PCM16_0104_v01:    PCM16_0104_mac    1
  71. PCM16_0104_v02:    PCM16_0104_mac    2
  72. PCM16_0104_v03:    PCM16_0104_mac    3
  73. PCM16_0104_v04:    PCM16_0104_mac    4
  74. PCM16_0104_v05:    PCM16_0104_mac    5
  75. PCM16_0104_v06:    PCM16_0104_mac    6
  76. PCM16_0104_v07:    PCM16_0104_mac    7
  77. PCM16_0104_v08:    PCM16_0104_mac    8
  78. PCM16_0104_v09:    PCM16_0104_mac    9
  79. PCM16_0104_v10:    PCM16_0104_mac    10
  80. PCM16_0104_v11:    PCM16_0104_mac    11
  81. PCM16_0104_v12:    PCM16_0104_mac    12
  82. PCM16_0104_v13:    PCM16_0104_mac    13
  83. PCM16_0104_v14:    PCM16_0104_mac    14
  84. PCM16_0104_v15:    PCM16_0104_mac    15
  85. PCM16_0104_vnn:    PCM16_0104_mac    'n'
  86. PCM16_0104_non:    PCM16_0104_mac    'x'
  87.