lavc: add a private cap for fake-delay encoders

Some encoders (ffv1, flac, adx) are marked with AV_CODEC_CAP_DELAY onky
in order to be flushed at the end, otherwise they behave as no-delay
encoders.

Add a capability to mark these encoders. Use it for setting pts
generically.

1 files changed, 8 insertions, 0 deletions

diff --git a/libavcodec/codec_internal.h b/libavcodec/codec_internal.h
index e3b77e6dea..130a7dc3cd 100644
--- a/libavcodec/codec_internal.h
+++ b/libavcodec/codec_internal.h
@@ -80,6 +80,14 @@
  * Codec supports embedded ICC profiles (AV_FRAME_DATA_ICC_PROFILE).
  */
 #define FF_CODEC_CAP_ICC_PROFILES           (1 << 9)
+/**
+ * The encoder has AV_CODEC_CAP_DELAY set, but does not actually have delay - it
+ * only wants to be flushed at the end to update some context variables (e.g.
+ * 2pass stats) or produce a trailing packet. Besides that it immediately
+ * produces exactly one output packet per each input frame, just as no-delay
+ * encoders do.
+ */
+#define FF_CODEC_CAP_EOF_FLUSH              (1 << 10)
 
 /**
  * FFCodec.codec_tags termination value