encode: get rid of the output packet queue

Until recently, ao_lavc and vo_lavc started encoding whenever the core
happened to send them data. Since audio and video are not initialized at
the same time, and the muxer was not necessarily opened when the first
encoder started to produce data, the resulting packets were put into a
queue. As soon as the muxer was opened, the queue was flushed.

Change this to make the core wait with sending data until all encoders
are initialized. This has the advantage that we don't need to queue up
the packets.

1 files changed, 4 insertions, 0 deletions

diff --git a/audio/out/internal.h b/audio/out/internal.h
index 33e8a8c6a9..bf769d7e1c 100644
--- a/audio/out/internal.h
+++ b/audio/out/internal.h
@@ -130,6 +130,10 @@ struct ao_driver {
     const char *name;
     // Description shown with --ao=help.
     const char *description;
+    // This requires waiting for a AO_EVENT_INITIAL_UNBLOCK event before the
+    // first play() call is done. Encode mode uses this, and push mode
+    // respects it automatically (don't use with pull mode).
+    bool initially_blocked;
     // Init the device using ao->format/ao->channels/ao->samplerate. If the
     // device doesn't accept these parameters, you can attempt to negotiate
     // fallback parameters, and set the ao format fields accordingly.