libaf/af_dummy.c

   1 /* The name speaks for itself this filter is a dummy and will not blow
   2    up regardless of what you do with it. */
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 #include "af.h"
   8
   9 // Initialization and runtime control
  10 static int control(struct af_instance_s* af, int cmd, void* arg)
  11 {
  12   switch(cmd){
  13   case AF_CONTROL_REINIT:
  14     memcpy(af->data,(af_data_t*)arg,sizeof(af_data_t));
  15     af_msg(AF_MSG_VERBOSE,"[dummy] Was reinitialized: %iHz/%ich/%s\n",
  16         af->data->rate,af->data->nch,af_fmt2str_short(af->data->format));
  17     return AF_OK;
  18   }
  19   return AF_UNKNOWN;
  20 }
  21
  22 // Deallocate memory
  23 static void uninit(struct af_instance_s* af)
  24 {
  25   if(af->data)
  26     free(af->data);
  27 }
  28
  29 // Filter data through filter
  30 static af_data_t* play(struct af_instance_s* af, af_data_t* data)
  31 {
  32   // Do something necessary to get rid of annoying warning during compile
  33   if(!af)
  34     af_msg(AF_MSG_ERROR,"EEEK: Argument af == NULL in af_dummy.c play().");
  35   return data;
  36 }
  37
  38 // Allocate memory and set function pointers
  39 static int open(af_instance_t* af){
  40   af->control=control;
  41   af->uninit=uninit;
  42   af->play=play;
  43   af->mul.d=1;
  44   af->mul.n=1;
  45   af->data=malloc(sizeof(af_data_t));
  46   if(af->data == NULL)
  47     return AF_ERROR;
  48   return AF_OK;
  49 }
  50
  51 // Description of this filter
  52 af_info_t af_info_dummy = {
  53     "dummy",
  54     "dummy",
  55     "Anders",
  56     "",
  57     AF_FLAGS_REENTRANT,
  58     open
  59 };