Re: audio check?

[Jim Langston]

Hi John,

Can I change wavread to include prints?

I have not seen the EOF logic get entered. I continually monitor line 
80, return c; which is
always 82, the method c_file_ptr_buf::underflow_common is being continually
called

truss output shows

28132:  read(5, 0x087A782C, 8192)                       = 0
28132:  ioctl(5, TCGETA, 0x08045BDC)                    Err#25 ENOTTY
28132:  xstat(2, "/usr/local/share/octave/2.9.13/m/audio/wavread.m", 
0x08045D04) = 0
28132:  xstat(2, "/usr/local/share/octave/2.9.13/m/audio/wavread.m", 
0x08045DE4) = 0
28132:  read(5, 0x087A782C, 8192)                       = 0
28132:  ioctl(5, TCGETA, 0x08045BDC)                    Err#25 ENOTTY
28132:  llseek(5, 0, SEEK_CUR)                          = 6153
28132:  close(5)                                        = 0
28132:  xstat(2, "a.wav", 0x0804607C)                   = 0
28132:  open("a.wav", O_RDONLY)                         = 5
28132:  fstat64(5, 0x08044FF0)                          = 0
28132:  fstat64(5, 0x08044F20)                          = 0
28132:  ioctl(5, TCGETA, 0x08044FBC)                    Err#25 ENOTTY
28132:  read(5, " R I F F L\0\0\0 W A V E".., 8192)     = 84
28132:      Received signal #2, SIGINT [caught]


Only one read was attempted, the SIGINT is me stopping the session

bash-3.00$ od -c a.wav
0000000   R   I   F   F   L  \0  \0  \0   W   A   V   E   f   m   t   
0000020 020  \0  \0  \0 001  \0  \n  \0   @ 037  \0  \0  \0   q 002  \0
0000040 024  \0 020  \0   d   a   t   a   (  \0  \0  \0 315  \f 232 031
0000060   f   &   3   3  \0   @ 315   L 232   Y   f   f   3   s 377 177
0000100 315  \f 232 031   f   &   3   3  \0   @ 315   L 232   Y   f   f
0000120   3   s 377 177
0000124
bash-3.00$


A little more debugging info, but don't see anything different

(dbx) cont
^Cdbx: warning: Interrupt ignored but forwarded to child.
address@hidden (address@hidden) signal INT (Interrupt) in getc at line 340 in file 
"stdio_iso.h"
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }
(dbx) list
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }
 341   inline int putc(int _x, FILE *_p) {
 342           return (--_p->_cnt < 0 ? __flsbuf(_x, _p)
 343                   : (int)(*_p->_ptr++ = (unsigned char) _x)); }
 344   }
 345   #else /* __cplusplus >= 199711L */
 346   #define getc(p)         (--(p)->_cnt < 0 ? __filbuf(p) : 
(int)*(p)->_ptr++)
 347   #define putc(x, p)      (--(p)->_cnt < 0 ? __flsbuf((x), (p)) \
 348                                   : (int)(*(p)->_ptr++ = (unsigned 
char) (x)))
 349   #endif /* __cplusplus >= 199711L */
(dbx) step
address@hidden (address@hidden) stopped in getc at line 340 in file 
"stdio_iso.h"
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 72 in file 
"c-file-ptr-stream.cc"
  72         if (! bump
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 78 in file 
"c-file-ptr-stream.cc"
  78           ungetc (c, f);
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 80 in file 
"c-file-ptr-stream.cc"
  80         return c;
(dbx) print *f
*f = {
   _cnt          = 84
   _ptr          = 0x87bad24 "RIFFL"
   _base         = 0x87bad24 "RIFFL"
   _flag         = '\t'
   _magic        = '\005'
   __orientation = 0
   __ionolock    = 0
   __seekable    = 1U
   __extendedfd  = 0
   __xf_nocheck  = 0
   __filler      = 0
}
(dbx) print c
c = 82
(dbx) print bump
bump = false
(dbx) list
  80         return c;
  81       }
  82     else
  83   #if defined (CXX_ISO_COMPLIANT_LIBRARY)
  84       return traits_type::eof ();
  85   #else
  86       return EOF;
  87   #endif
  88   }
  89  
(dbx) print c
c = 82
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 88 in file 
"c-file-ptr-stream.cc"
  88   }
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow at line 53 in file 
"c-file-ptr-stream.h"
  53     int_type underflow (void) { return underflow_common (false); }


(dbx) list
  53     int_type underflow (void) { return underflow_common (false); }
  54  
  55     int_type uflow (void) { return underflow_common (true); }
  56  
  57     int_type pbackfail (int_type);
  58  
  59     std::streamsize xsputn (const char*, std::streamsize);
  60  
  61     std::streamsize xsgetn (char *, std::streamsize);
  62  
(dbx) where
current thread: address@hidden
=>[1] c_file_ptr_buf::underflow(this = 0x87a9810), line 53 in 
"c-file-ptr-stream.h"
 [2] std::basic_istream<char,std::char_traits<char> >::read(0x87a79e0, 
0x8045ab2, 0x1), at 0xfbf7aaa7
 [3] do_read<NDArray,unsigned char>(strm = STRUCT, nr = 4, nc = 1, 
block_size = 1, skip = 0, do_float_fmt_conv = false, from_flt_fmt = 
flt_fmt_ieee_little_endian, count = 0), line 3122 in "unknown"
 [4] octave_stream::read(this = 0x8045d2c, size = CLASS, block_size = 
1, input_type = dt_uchar, output_type = dt_double, skip = 0, ffmt = 
flt_fmt_ieee_little_endian, char_count = 0), line 3327 in "oct-stream.cc"
 [5] do_fread(os = STRUCT, size_arg = CLASS, prec_arg = CLASS, skip_arg 
= CLASS, arch_arg = CLASS, count = 0), line 1260 in "file-io.cc"
 [6] Ffread(args = CLASS, _ARG3 = 1), line 1489 in "file-io.cc"
 [7] octave_builtin::do_multi_index_op(this = 0x8254b00, nargout = 1, 
args = CLASS), line 104 in "ov-builtin.cc"
 [8] octave_builtin::subsref(this = 0x8254b00, type = CLASS, idx = 
CLASS, nargout = 1), line 54 in "ov-builtin.cc"
 [9] octave_value::subsref(this = 0x80460c8, type = CLASS, idx = CLASS, 
nargout = 1), line 723 in "ov.cc"
 [10] tree_index_expression::rvalue(this = 0x87c6b10, nargout = 1), 
line 352 in "pt-idx.cc"
 [11] tree_index_expression::rvalue(this = 0x87c6b10), line 363 in 
"pt-idx.cc"
 [12] tree_argument_list::convert_to_const_vector(this = 0x87c4168, 
object = 0x8046450), line 182 in "pt-arg-list.cc"
 [13] make_value_list(args = 0x87c4168, arg_nm = CLASS, object = 
0x8046450), line 174 in "pt-idx.cc"
 [14] tree_index_expression::rvalue(this = 0x87c6928, nargout = 1), 
line 323 in "pt-idx.cc"
 [15] tree_index_expression::rvalue(this = 0x87c6928), line 363 in 
"pt-idx.cc"
 [16] tree_postfix_expression::rvalue(this = 0x87c4190), line 191 in 
"pt-unop.cc"
 [17] tree_simple_assignment::rvalue(this = 0x87c7478), line 202 in 
"pt-assign.cc"
 [18] tree_simple_assignment::rvalue(this = 0x87c7478, nargout = 0), 
line 184 in "pt-assign.cc"
 [19] tree_statement::eval(this = 0x87c6ec0, silent = false, nargout = 
0, in_function_body = true), line 133 in "pt-stmt.cc"
 [20] tree_statement_list::eval(this = 0x87c3ab0, silent = false, 
nargout = 0), line 190 in "pt-stmt.cc"
 [21] octave_user_function::do_multi_index_op(this = 0x825baa0, nargout 
= 3, args = CLASS), line 366 in "ov-usr-fcn.cc"
 [22] octave_user_function::subsref(this = 0x825baa0, type = CLASS, idx 
= CLASS, nargout = 3), line 220 in "ov-usr-fcn.cc"
 [23] octave_value::subsref(this = 0x8046dc8, type = CLASS, idx = 
CLASS, nargout = 3), line 723 in "ov.cc"
 [24] tree_index_expression::rvalue(this = 0x83c6fd8, nargout = 3), 
line 352 in "pt-idx.cc"
 [25] tree_multi_assignment::rvalue(this = 0x845bec0, _ARG3 = 0), line 
362 in "pt-assign.cc"
 [26] tree_statement::eval(this = 0x84b0a58, silent = false, nargout = 
0, in_function_body = false), line 133 in "pt-stmt.cc"
 [27] tree_statement_list::eval(this = 0x87b7938, silent = false, 
nargout = 0), line 190 in "pt-stmt.cc"
 [28] main_loop(), line 225 in "toplev.cc"
 [29] octave_main(argc = 1, argv = 0x8047364, embedded = 0), line 791 
in "octave.cc"
 [30] main(argc = 1, argv = 0x8047364), line 36 in "main.c"
(dbx) thread -info address@hidden
       Thread address@hidden (0xfc312000) at priority 0
       state: active on    address@hidden
       base function: 0x0: 0x00000000() stack: 0x8048000[10485760]
       flags: (none)
       masked signals: (none)
       Currently active in underflow
(dbx) step
^Cdbx: warning: Interrupt ignored but forwarded to child.
address@hidden (address@hidden) signal INT (Interrupt) in _dladdr at 0xfbdbdf94
0xfbdbdf94: _dladdr+0x2df94 [PLT]:      jmp      *0x000000e4(%ebx)
Current function is c_file_ptr_buf::underflow_common
  78           ungetc (c, f);
(dbx) thread -info address@hidden
       Thread address@hidden (0xfc312000) at priority 0
       state: active on    address@hidden
       base function: 0x0: 0x00000000() stack: 0x8048000[10485760]
       flags: (none)
       masked signals: (none)
       Currently active in _dladdr
(dbx) print c
c = 82
(dbx) print *f
*f = {
   _cnt          = 83
   _ptr          = 0x87bad25 "IFFL"
   _base         = 0x87bad24 "RIFFL"
   _flag         = '\t'
   _magic        = '\005'
   __orientation = 0
   __ionolock    = 0
   __seekable    = 1U
   __extendedfd  = 0
   __xf_nocheck  = 0
   __filler      = 0
}
(dbx) cont
^Cdbx: warning: Interrupt ignored but forwarded to child.
address@hidden (address@hidden) signal INT (Interrupt) in getc at line 340 in file 
"stdio_iso.h"
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }
(dbx) step
address@hidden (address@hidden) stopped in getc at line 340 in file 
"stdio_iso.h"
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 72 in file 
"c-file-ptr-stream.cc"
  72         if (! bump
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 78 in file 
"c-file-ptr-stream.cc"
  78           ungetc (c, f);
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 80 in file 
"c-file-ptr-stream.cc"
  80         return c;
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow_common at line 88 in file 
"c-file-ptr-stream.cc"
  88   }
(dbx) step
address@hidden (address@hidden) stopped in c_file_ptr_buf::underflow at line 53 in file 
"c-file-ptr-stream.h"
  53     int_type underflow (void) { return underflow_common (false); }
(dbx) step
^Cdbx: warning: Interrupt ignored but forwarded to child.
address@hidden (address@hidden) signal INT (Interrupt) in getc at line 340 in file 
"stdio_iso.h"
 340           return (--_p->_cnt < 0 ? __filbuf(_p) : (int)*_p->_ptr++); }


Jim

//////////////////////////////////

John W. Eaton wrote:
> On  5-Sep-2007, Jim Langston wrote:
>
> | It looks like a loop:
> | 
> | (dbx) cont
> | ^Cdbx: warning: Interrupt ignored but forwarded to child.
> | address@hidden (address@hidden) signal INT (Interrupt) in std::char_traits<char>::eof at 
> | 0xfbef0124
> | 0xfbef0124: eof       : movl     $0xffffffff,%eax
> | Current function is c_file_ptr_buf::underflow_common
> |    72         if (! bump
> | (dbx) list
> |    72         if (! bump
> |    73   #if defined (CXX_ISO_COMPLIANT_LIBRARY)
> |    74             && c != traits_type::eof ())
> |    75   #else
> |    76             && c != EOF)
> |    77   #endif
> |    78           ungetc (c, f);
> |    79  
> |    80         return c;
> |    81       }
> | (dbx) cont
> | ^Cdbx: warning: Interrupt ignored but forwarded to child.
> | address@hidden (address@hidden) signal INT (Interrupt) in c_file_ptr_buf::underflow at line 53 
> | in file "c-file-ptr-stream.h"
> |    53     int_type underflow (void) { return underflow_common (false); }
> | (dbx) list
> |    53     int_type underflow (void) { return underflow_common (false); }
> |    54  
> |    55     int_type uflow (void) { return underflow_common (true); }
> |    56  
> |    57     int_type pbackfail (int_type);
> |    58  
> |    59     std::streamsize xsputn (const char*, std::streamsize);
> |    60  
> |    61     std::streamsize xsgetn (char *, std::streamsize);
> |    62  
> | (dbx) cont
> | ^Cdbx: warning: Interrupt ignored but forwarded to child.
> | address@hidden (address@hidden) signal INT (Interrupt) in _ungetc_unlocked at 
> 0xfbe151d1
> | 0xfbe151d1: _ungetc_unlocked+0x0011:    addl     $0x00069e30,%ebx
> | Current function is c_file_ptr_buf::underflow_common
> |    78           ungetc (c, f);
> | (dbx)
>
> The next question is why is it looping?  Is it at the end of the file?
> Are we incorrectly trying to put EOF back on the input stream?  If so,
> what is the source of that error?  It looks like this must be
> happening in one of the calls to fread in wavread.m.  Can you
> determine which call to fread it is, and whether the data that has
> been read up to that point is correct?
>
> jwe
>   


--
/////////////////////////////////////////////

Jim Langston
Sun Microsystems, Inc.

(877) 854-5583 (AccessLine)
AIM: jl9594
address@hidden