avcodec/rl: Add analogue for ff_rl_init() without RLTable

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/libavcodec/rl.h b/libavcodec/rl.h
index 07e3da5003..4380fda272 100644
--- a/libavcodec/rl.h
+++ b/libavcodec/rl.h
@@ -49,6 +49,16 @@ typedef struct RLTable {
 } RLTable;
 
 /**
+ * Initialize max_level and index_run from table_run and table_level;
+ * this is equivalent to initializing RLTable.max_level[0] and
+ * RLTable.index_run[0] with ff_rl_init().
+ */
+void ff_rl_init_level_run(uint8_t max_level[MAX_LEVEL + 1],
+                          uint8_t index_run[MAX_RUN + 1],
+                          const uint8_t table_run[/* n */],
+                          const uint8_t table_level[/* n*/], int n);
+
+/**
  * Initialize index_run, max_level and max_run from n, last, table_vlc,
  * table_run and table_level.
  * @param static_store static uint8_t array[2][2*MAX_RUN + MAX_LEVEL + 3]