interpreter/lib/src/libsndfile-ocaml/test_sndfile_bigarray.ml

   1 (* Rudimentary testing of the Ocaml libsndfile wrapper. *)
   2
   3 let write_test filename =
   4         let fmt = Sndfile.format Sndfile.MAJOR_WAV Sndfile.MINOR_PCM_16 in
   5         let file = Sndfile.openfile filename ~info:(Sndfile.WRITE, fmt, 2, 44100) () in
   6         if Sndfile.error file != 0 then
   7                 Printf.printf "Error writing '%s' : %s\n" filename (Sndfile.strerror file)
   8         else
   9         let writecount = Sndfile_bigarray.write_short file [| 0.0 ;  0.0 ;  0.0 ;  0.0 ;  0.0 ;  0.0 ;  0.0 ;  0.5 |] in
  10         Printf.printf "Wrote %d items.\n" writecount ;
  11         Sndfile.close file
  12
  13 let read_test filename =
  14         let file = Sndfile.openfile filename () in
  15         Printf.printf "File contains %Ld frames.\n" (Sndfile.frames file) ;
  16         let data = Array.create 100 0.0 in
  17         let readcount = Sndfile_bigarray.read_short file data in
  18         Printf.printf "Read %d items.\n" readcount ;
  19         Sndfile.close file
  20
  21 let finalize_test filename =
  22         let sub_open_file =
  23                 let file = Sndfile.openfile filename () in
  24                 ignore file
  25         in
  26         (* Compact the heap. *)
  27         Gc.compact () ;
  28         let pre_stat = Gc.stat () in
  29         sub_open_file ;
  30         (* Compact the heap again. *)
  31         Gc.compact () ;
  32         (* Compare before and after. *)
  33         let post_stat = Gc.stat () in
  34         if pre_stat.Gc.heap_words != post_stat.Gc.heap_words then
  35         (       Printf.printf "\nFinalize not working : before %d -> after %d\n\n" pre_stat.Gc.heap_words post_stat.Gc.heap_words ;
  36                 exit 1
  37                 )
  38         else ()
  39
  40
  41 let _ =
  42         print_endline "------------------------" ;
  43         let filename = "a.wav" in
  44         write_test filename ;
  45         read_test filename ;
  46         finalize_test filename