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, 14 insertions, 0 deletions

diff --git a/libavcodec/decode.c b/libavcodec/decode.c
index 390147908d..0956a6ac6f 100644
--- a/libavcodec/decode.c
+++ b/libavcodec/decode.c
@@ -2091,3 +2091,17 @@ FF_ENABLE_DEPRECATION_WARNINGS
 
     return 0;
 }
+
+int ff_copy_palette(void *dst, const AVPacket *src, void *logctx)
+{
+    buffer_size_t size;
+    const void *pal = av_packet_get_side_data(src, AV_PKT_DATA_PALETTE, &size);
+
+    if (pal && size == AVPALETTE_SIZE) {
+        memcpy(dst, pal, AVPALETTE_SIZE);
+        return 1;
+    } else if (pal) {
+        av_log(logctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
+    }
+    return 0;
+}