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/ IRIX Base Documentation 2002 November / SGI IRIX Base Documentation 2002 November.iso / usr / share / catman / p_man / cat3dm / audio / ALgetwidth.z / ALgetwidth
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Text File  |  2002-10-03  |  6.7 KB  |  133 lines
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  4. AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm))))                                                AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm))))
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  8. NNNNAAAAMMMMEEEE
  9.      ALsetwidth, ALgetwidth - (obsolete) get/set the sample width setting in
  10.      an audio AAAALLLLccccoooonnnnffffiiiigggg structure
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  12. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  13.      ####iiiinnnncccclllluuuuddddeeee <<<<ddddmmmmeeeeddddiiiiaaaa////aaaauuuuddddiiiioooo....hhhh>>>>
  14.  
  15.      lllloooonnnngggg AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((AAAALLLLccccoooonnnnffffiiiigggg ccccoooonnnnffffiiiigggg))))
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  17.      iiiinnnntttt AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((AAAALLLLccccoooonnnnffffiiiigggg ccccoooonnnnffffiiiigggg,,,, lllloooonnnngggg ssssaaaammmmpppplllleeeessssiiiizzzzeeee))))
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  19. PPPPAAAARRRRAAAAMMMMEEEETTTTEEEERRRR
  20.      _c_o_n_f_i_g       expects an AAAALLLLccccoooonnnnffffiiiigggg structure, the returned value of a call
  21.                   to AAAALLLLnnnneeeewwwwccccoooonnnnffffiiiigggg((((3333ddddmmmm)))) or AAAALLLLggggeeeettttccccoooonnnnffffiiiigggg((((3333ddddmmmm)))).
  22.  
  23.      _s_a_m_p_l_e_s_i_z_e   expects a symbolic constant that identifies the size of an
  24.                   audio sample.  There are three symbolic constants defined
  25.                   for this parameter.
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  27.                   AAAALLLL____SSSSAAAAMMMMPPPPLLLLEEEE____8888 indicates a one byte sample width in the range
  28.                   -128 to 127.
  29.  
  30.                   AAAALLLL____SSSSAAAAMMMMPPPPLLLLEEEE____11116666 indicates a two byte sample width in the range
  31.                   -32768 to 32767.
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  33.                   AAAALLLL____SSSSAAAAMMMMPPPPLLLLEEEE____22224444 indicates a 4 byte sample width in the range
  34.                   -8388608 to 8388607.
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  36. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  37.      AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh and AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh are obsolete and are provided for backward
  38.      compatibility. The preferred functions are aaaallllSSSSeeeettttWWWWiiiiddddtttthhhh((((3333ddddmmmm)))) and
  39.      aaaallllGGGGeeeettttWWWWiiiiddddtttthhhh((((3333ddddmmmm)))).
  40.  
  41.      AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) sets the sample width setting in the AAAALLLLccccoooonnnnffffiiiigggg structure
  42.      _c_o_n_f_i_g.  Any audio port that you then configure using _c_o_n_f_i_g will have
  43.      the audio sample size you specify with _s_a_m_p_l_e_s_i_z_e.
  44.  
  45.      AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) can fail for the following reasons:
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  47.      AAAALLLL____BBBBAAAADDDD____CCCCOOOONNNNFFFFIIIIGGGG   _c_o_n_f_i_g is invalid or null.
  48.  
  49.      AAAALLLL____BBBBAAAADDDD____WWWWIIIIDDDDTTTTHHHH    _w_i_d_t_h is not one of the valid constants listed above.
  50.  
  51.      AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) returns the current sample width setting in the AAAALLLLccccoooonnnnffffiiiigggg
  52.      structure _c_o_n_f_i_g.
  53.  
  54.      AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) can fail for the following reason:
  55.  
  56.      AAAALLLL____BBBBAAAADDDD____CCCCOOOONNNNFFFFIIIIGGGG    _c_o_n_f_i_g is invalid or null.
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  63.                                                                         PPPPaaaaggggeeee 1111
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  70. AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm))))                                                AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm))))
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  74.      Both AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) and AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) are meaningful if you are using
  75.      the two's complement sample format (the default). If you are using
  76.      floating point data (see AAAALLLLsssseeeettttssssaaaammmmppppffffmmmmtttt((((3333ddddmmmm))))), calls to AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm))))
  77.      will not affect the behavior of AAAALLLLrrrreeeeaaaaddddssssaaaammmmppppssss((((3333ddddmmmm)))) or AAAALLLLwwwwrrrriiiitttteeeessssaaaammmmppppssss((((3333ddddmmmm))))
  78.      until you switch to two's complement sample format.
  79.  
  80. DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS
  81.      Upon successful completion AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) returns a long whose value is
  82.      one of the symbolic constants described above for _s_a_m_p_l_e_s_i_z_e. Otherwise,
  83.      AAAALLLLggggeeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) returns -1 and and sets an error number. This error
  84.      number can be retrieved with oooosssseeeerrrrrrrroooorrrr((((3333CCCC)))).
  85.  
  86.      AAAALLLLsssseeeettttwwwwiiiiddddtttthhhh((((3333ddddmmmm)))) returns 0 to the calling process when successful.
  87.      Otherwise, it returns -1 and sets an error number as described above.
  88.  
  89. SSSSEEEEEEEE AAAALLLLSSSSOOOO
  90.      ALnewconfig(3dm), ALgetconfig(3dm), ALopenport(3dm), ALsetconfig(3dm),
  91.      oserror(3C)
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  129.                                                                         PPPPaaaaggggeeee 2222
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