gsm_audio.c

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** LCR                                                                       **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** gsm audio                                                                 **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 extern "C" {
  13 #include "/usr/include/gsm/gsm.h"
  14
  15
  16 /* create gsm instance */
  17 void *gsm_audio_create(void)
  18 {
  19         int value = 1;
  20         gsm handle;
  21
  22         handle = gsm_create();
  23         if (handle)
  24                 gsm_option(handle, 0/*GSM_OPT_WAV49*/, &value);
  25
  26         return handle;
  27 }
  28
  29 /* free gsm instance */
  30 void gsm_audio_destroy(void *arg)
  31 {
  32         gsm_destroy((gsm)arg);
  33 }
  34
  35 /* decode frame into samples, return error */
  36 int gsm_audio_decode(void *arg, unsigned char *frame, signed short *samples)
  37 {
  38 //      int value = 0;
  39
  40 //      gsm_option((gsm)arg, GSM_OPT_FRAME_INDEX, &value);
  41         return gsm_decode((gsm)arg, (gsm_byte *)frame, (gsm_signal *)samples);
  42 }
  43
  44 /* encode samples into frame */
  45 void gsm_audio_encode(void *arg, signed short *samples, unsigned char *frame)
  46 {
  47 //      int value = 0;
  48
  49 //      gsm_option((gsm)arg, GSM_OPT_FRAME_INDEX, &value);
  50         gsm_encode((gsm)arg, (gsm_signal *)samples, (gsm_byte *)frame);
  51 }
  52
  53 } /* extern "C" */
  54