output.h

   1 /*
   2  * Copyright 2005 Timo Hirvonen
   3  */
   4
   5 #ifndef _OUTPUT_H
   6 #define _OUTPUT_H
   7
   8 #include "sf.h"
   9
  10 extern int soft_vol;
  11 extern int soft_vol_l;
  12 extern int soft_vol_r;
  13
  14 void op_load_plugins(void);
  15 void op_exit_plugins(void);
  16
  17 /*
  18  * select output plugin and open its mixer
  19  *
  20  * errors: OP_ERROR_{ERRNO, NO_PLUGIN}
  21  */
  22 int op_select(const char *name);
  23 int op_select_any(void);
  24
  25 /*
  26  * open selected plugin
  27  *
  28  * errors: OP_ERROR_{}
  29  */
  30 int op_open(sample_format_t sf);
  31
  32 /*
  33  * drop pcm data
  34  *
  35  * errors: OP_ERROR_{ERRNO}
  36  */
  37 int op_drop(void);
  38
  39 /*
  40  * close plugin
  41  *
  42  * errors: OP_ERROR_{}
  43  */
  44 int op_close(void);
  45
  46 /*
  47  * returns bytes written or error
  48  *
  49  * errors: OP_ERROR_{ERRNO}
  50  */
  51 int op_write(const char *buffer, int count);
  52
  53 /*
  54  * errors: OP_ERROR_{}
  55  */
  56 int op_pause(void);
  57 int op_unpause(void);
  58
  59 /*
  60  * returns space in output buffer in bytes or -1 if busy
  61  */
  62 int op_buffer_space(void);
  63
  64 /*
  65  * errors: OP_ERROR_{}
  66  */
  67 int op_reset(void);
  68
  69 int op_set_volume(int left, int right);
  70 int op_get_volume(int *left, int *right);
  71
  72 void op_set_soft_vol(int soft);
  73
  74 /*
  75  * errors: OP_ERROR_{NO_PLUGIN, NOT_INITIALIZED, NOT_OPTION}
  76  */
  77 int op_set_option(unsigned int id, const char *val);
  78 int op_get_option(unsigned int id, char **val);
  79
  80 int op_for_each_option(void (*cb)(unsigned int id, const char *key));
  81 char *op_get_error_msg(int rc, const char *arg);
  82 void op_dump_plugins(void);
  83 char *op_get_current(void);
  84
  85 #endif