v4l2slh264dec: Fix slice header bit size calculation

The emulation bytes need to be removed as bytes, not bit. This fixes
decoding issues with files that have emulation bytes with the Cedrus
driver.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2471>

diff --git a/sys/v4l2codecs/gstv4l2codech264dec.c b/sys/v4l2codecs/gstv4l2codech264dec.c
index 7804b87..3004e67 100644 (file)
--- a/sys/v4l2codecs/gstv4l2codech264dec.c
+++ b/sys/v4l2codecs/gstv4l2codech264dec.c
@@ -652,8 +652,8 @@ gst_v4l2_codec_h264_dec_fill_pred_weight (GstV4l2CodecH264Dec * self,
 static guint
 get_slice_header_bit_size (GstH264Slice * slice)
 {
-  return 8 * slice->nalu.header_bytes
-      + slice->header.header_size - slice->header.n_emulation_prevention_bytes;
+  return 8 * slice->nalu.header_bytes + slice->header.header_size
+      - 8 * slice->header.n_emulation_prevention_bytes;
 }
 
 static void