X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/disorder/blobdiff_plain/902ccab074b767f56385b36a6dc6161091527d4f..adeb58a0d6cd87787c6275bd86254a5f4fa1de96:/lib/uaudio.h

diff --git a/lib/uaudio.h b/lib/uaudio.h
index 119d6b6..20bfbbc 100644
--- a/lib/uaudio.h
+++ b/lib/uaudio.h
@@ -90,11 +90,36 @@ struct uaudio {
    */
   void (*deactivate)(void);
 
+  /** @brief Open mixer device */
+  void (*open_mixer)(void);
+
+  /** @brief Closer mixer device */
+  void (*close_mixer)(void);
+
+  /** @brief Get volume
+   * @param left Where to put the left-channel value
+   * @param right Where to put the right-channel value
+   *
+   * 0 is silent and 100 is maximum volume.
+   */
+  void (*get_volume)(int *left, int *right);
+
+  /** @brief Set volume
+   * @param left Pointer to left-channel value (updated)
+   * @param right Pointer to right-channel value (updated)
+   *
+   * The values are updated with those actually set by the underlying system
+   * call.
+   *
+   * 0 is silent and 100 is maximum volume.
+   */
+  void (*set_volume)(int *left, int *right);
+  
 };
 
 void uaudio_set_format(int rate, int channels, int samplesize, int signed_);
 void uaudio_set(const char *name, const char *value);
-char *uaudio_get(const char *name);
+char *uaudio_get(const char *name, const char *default_value);
 void uaudio_thread_start(uaudio_callback *callback,
 			 void *userdata,
 			 uaudio_playcallback *playcallback,
@@ -106,6 +131,7 @@ void uaudio_thread_deactivate(void);
 void uaudio_schedule_synchronize(void);
 void uaudio_schedule_update(size_t written_samples);
 void uaudio_schedule_init(void);
+const struct uaudio *uaudio_find(const char *name);
 
 extern uint64_t uaudio_schedule_timestamp;
 extern int uaudio_schedule_reactivated;
@@ -126,7 +152,7 @@ extern const struct uaudio uaudio_rtp;
 
 extern const struct uaudio uaudio_command;
 
-extern const struct uaudio *uaudio_apis[];
+extern const struct uaudio *const uaudio_apis[];
 
 #endif /* UAUDIO_H */