Merge branch 'maint'

diff --combined oss_write.c
index 9ec85560d29ebef00f269a95ca2fda49e9c427d1,3ef0d9e8867c5b692f8cc8b2afc8a47c6fdda7e9..7edd486fccc37a295700b3dedd9cc0da76976e24
--- 1/oss_write.c
--- 2/oss_write.c
+++ b/oss_write.c
@@@ -6,7 -6,6 +6,7 @@@
  
  /** \file oss_write.c Paraslash's oss output plugin. */
  
 +#include <regex.h>
  #include <sys/ioctl.h>
  #include <fcntl.h>
  #include <dirent.h>
@@@ -48,13 -47,13 +48,13 @@@ static int oss_pre_select(struct sched 
        struct private_oss_write_data *powd = wn->private_data;
        struct writer_node_group *wng = wn->wng;
  
-       if (!*wng->loaded)
+       if (*wng->loaded - wn->written < powd->bytes_per_frame)
                return 0;
        para_fd_set(powd->fd, &s->wfds, &s->max_fileno);
        return 1;
  }
- static int oss_post_select(__a_unused struct sched *s,
-               struct writer_node *wn)
+ 
+ static int oss_post_select(struct sched *s, struct writer_node *wn)
  {
        int ret;
        struct private_oss_write_data *powd = wn->private_data;

diff --combined write_common.c
index 5eb6b796cbff4a8ce74fae16017e4366485ae84f,2dca309c622eb53f198bb8ab7d287a9ade33c2cc..3f6c0bbea422bbbc44e16857000b78df6d45a5d8
--- 1/write_common.c
--- 2/write_common.c
+++ b/write_common.c
@@@ -6,8 -6,6 +6,8 @@@
  
  /** \file write_common.c common functions of para_audiod and para_write */
  
 +#include <regex.h>
 +
  #include "para.h"
  #include "string.h"
  #include "list.h"
@@@ -22,7 -20,7 +22,7 @@@ const char *writer_names[] ={WRITER_NAM
  /** the array of supported writers */
  struct writer writers[NUM_SUPPORTED_WRITERS] = {WRITER_ARRAY};
  
- static void wng_pre_select(__a_unused struct sched *s, struct task *t)
+ static void wng_pre_select(struct sched *s, struct task *t)
  {
        struct writer_node_group *g = container_of(t, struct writer_node_group, task);
        int i;
@@@ -36,13 -34,25 +36,25 @@@
                if (t->error < 0)
                        return;
        }
+       /*
+        * Force a minimal delay if something was written during the previous
+        * call to wng_post_select(). This is necessary because the filter
+        * chain might still have data for us which it couldn't convert during
+        * the previous run due to its buffer size constraints. In this case we
+        * do not want to wait until the next input data arrives as this could
+        * lead to buffer underruns.
+        */
+       if (g->last_written == 0)
+               return;
+       s->timeout.tv_sec = 0;
+       s->timeout.tv_usec = 1;
  }
  
  static void wng_post_select(struct sched *s, struct task *t)
  {
        struct writer_node_group *g = container_of(t, struct writer_node_group, task);
        int i;
-       size_t min_written = 0;
+       size_t min_written = 0, max_written = 0;
  
        FOR_EACH_WRITER_NODE(i, g) {
                struct writer_node *wn = &g->writer_nodes[i];
@@@ -54,7 -64,9 +66,9 @@@
                        min_written = wn->written;
                else
                        min_written = PARA_MIN(min_written, wn->written);
+               max_written = PARA_MAX(max_written, wn->written);
        }
+       g->last_written = max_written;
        //PARA_INFO_LOG("loaded: %zd, min_written: %zd bytes\n", *g->loaded, min_written);
        if (min_written) {
                *g->loaded -= min_written;