- /**
- * The init function of the writer.
- *
- * It must fill in all other function pointers of the given
- * writer structure.
- */
- void (*init)(struct writer *w);
- /**
- * The command line parser of the writer.
- *
- * It should check whether the command line options given by \a options are
- * valid. On success, it should return a pointer to the writer-specific
- * configuration data determined by \a options. Note that this might be called
- * more than once with different values of \a options.
- */
- void *(*parse_config)(const char *options);
- /**
- * Open one instance of this writer.
- *
- * This function should perform any work necessary to write the incoming
- * stream. To this aim, it may allocate its private data structure and store
- * a pointer to that structure via the given writer_node parameter.
- */
- int (*open)(struct writer_node *);
- /**
- * Prepare the fd sets for select.
- *
- * This is called from the writer node group task's pre_select(). It
- * may use the sched pointer to add any file descriptors or to decrease
- * the select timeout. It must return positive on success and negative
- * on errors.
- */
- int (*pre_select)(struct sched *s, struct writer_node *wn);
- /**
- * Write audio data.
- *
- * Called from the post_select function of the wng task. It must keep
- * track of the number of bytes consumed from the wng's buffer via
- * the \p wn->written variable (which may be modified by the wng handling
- * functions). This function must return positive on success and
- * negative on errors.
- */
- int (*post_select)(struct sched *s, struct writer_node *wn);
+ /** Ask the scheduler to check whether data can be written. */
+ void (*pre_monitor)(struct sched *s, void *context);
+ /** Write audio data. */
+ int (*post_monitor)(struct sched *s, void *context);