es_format_t: add i_level

It indicates restrictions on the ES (resolution, bitrate, codec
features...), like the H264 level

include/vlc_es.h

@@ -256,6 +256,7 @@ struct es_format_t
 
     unsigned int   i_bitrate; /**< bitrate of this ES */
     int      i_profile;       /**< codec specific information (like real audio flavor, mpeg audio layer, h264 profile ...) */
+    int      i_level;         /**< codec specific information: indicates maximum restrictions on the stream (resolution, bitrate, codec features ...) */
 
     bool     b_packetized;  /**< wether the data is packetized (ie. not truncated) */
     int     i_extra;        /**< length in bytes of extra data pointer */

src/misc/es_format.c

@@ -242,6 +242,7 @@ void es_format_Init( es_format_t *fmt,
     fmt->i_codec                = i_codec;
     fmt->i_original_fourcc      = 0;
     fmt->i_profile              = -1;
+    fmt->i_level                = -1;
     fmt->i_id                   = -1;
     fmt->i_group                = 0;
     fmt->i_priority             = 0;