PAD: insert DLS regularly while SLS transmission

When a slide is transmitted, now every 50 PADs the current DLS is inserted
(and thereby reread from file). Hence in the best case (AAC-LC @ 48 kHz), DLS
is inserted every 1000ms; in the worst case (HE-AAC @ 32 kHz) it is inserted
every 3000ms. This way a listener will get DLS much earlier after switching to
a service, compared to the previous situation where the slide transmission was
not interrupted for DLS insertion.

Note that there still remains a delay without any PAD, between the end of a
slide transmission and the start of the next one's transmission.

Also note that adding a feedback channel from the audio encoder to ODR-PadEnc
will make this improvement obsolete.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/pad_common.h b/src/pad_common.h
index c997d83..c3ee01d 100644
--- a/src/pad_common.h
+++ b/src/pad_common.h
@@ -105,9 +105,10 @@ public:
 
     void AddDG(DATA_GROUP* dg, bool prepend);
     void AddDGs(const std::vector<DATA_GROUP*>& dgs, bool prepend);
+    bool QueueFilled();
 
     pad_t* GetPAD();
 
     // will be removed, when pull (instead of push) approach is implemented!
-    void WriteAllPADs(int output_fd);
+    void WriteAllPADs(int output_fd, int limit = -1);
 };