avcodec/cbs: add a helper to read extradata within packet side data

Using ff_cbs_read() on the raw buffer will not parse it as extradata,
resulting in parsing errors for example when handling ISOBMFF avcC.
This helper works around that.

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/libavcodec/cbs.h b/libavcodec/cbs.h
index b7acf98347..bd97d163b1 100644
--- a/libavcodec/cbs.h
+++ b/libavcodec/cbs.h
@@ -276,6 +276,10 @@ int ff_cbs_read_extradata_from_codec(CodedBitstreamContext *ctx,
                                      CodedBitstreamFragment *frag,
                                      const struct AVCodecContext *avctx);
 
+int ff_cbs_read_packet_side_data(CodedBitstreamContext *ctx,
+                                 CodedBitstreamFragment *frag,
+                                 const AVPacket *pkt);
+
 /**
  * Read the data bitstream from a packet into a fragment, then
  * split into units and decompose.