oggdec: Fix EOF handling on repositioning.

If playback starts near the end of the file, it might happen that (a)
the read callback consumes all the remaining part in one go (so the
node status is BTR_EOF) and (b) the last ov_read() returned OV_HOLE.

(b) makes the decoder wait for more data which will never arrive due to
(a). Currently we error out without playing the last part of the file.

This patch makes ogg_post_select() return an error only if additionally
fn->min_iqs == 0, which indicates we did not hit OV_HOLE during the
last ov_read().

diff --git a/oggdec_filter.c b/oggdec_filter.c
index 16c8d907f01fab92fa6c1c74435920448da5349f..9498313c6ca42cb1cbe2c3e792b88f8f381d1d14 100644 (file)
--- a/oggdec_filter.c
+++ b/oggdec_filter.c
@@ -208,9 +208,13 @@ static void ogg_post_select(__a_unused struct sched *s, struct task *t)
        char *buf;
 
        ret = btr_node_status(btrn, fn->min_iqs, BTR_NT_INTERNAL);
-       if (ret < 0 && ret != -E_BTR_EOF) /* fatal error */
-               goto out;
-       if (ret <= 0 && !pod->have_more) /* nothing to do */
+       if (ret < 0) {
+               if (ret != -E_BTR_EOF) /* fatal error */
+                       goto out;
+               if (fn->min_iqs == 0 && !pod->have_more) /* EOF */
+                       goto out;
+               /* last ov_read() returned OV_HOLE */
+       } else if (ret == 0 && !pod->have_more) /* nothing to do */
                goto out;
        if (btr_get_output_queue_size(btrn) > OGGDEC_MAX_OUTPUT_SIZE)
                return;