avcodec: Factor updating palette out

Because the properties of frames returned from ff_get/reget_buffer
are not reset at all, lots of returned frames had palette_has_changed
wrongly set to 1. This has been changed, too.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/libavcodec/decode.h b/libavcodec/decode.h
index 1467b1eb33..dee2543b1c 100644
--- a/libavcodec/decode.h
+++ b/libavcodec/decode.h
@@ -80,6 +80,15 @@ int ff_decode_get_hw_frames_ctx(AVCodecContext *avctx,
 int ff_attach_decode_data(AVFrame *frame);
 
 /**
+ * Check whether the side-data of src contains a palette of
+ * size AVPALETTE_SIZE; if so, copy it to dst and return 1;
+ * else return 0.
+ * Also emit an error message upon encountering a palette
+ * with invalid size.
+ */
+int ff_copy_palette(void *dst, const AVPacket *src, void *logctx);
+
+/**
  * Perform decoder initialization and validation.
  * Called when opening the decoder, before the AVCodec.init() call.
  */