demux: mkv: use the coded_frame_size for RA288 block alignment

As done in libavformat.

modules/demux/mkv/matroska_segment_parse.cpp

@@ -2157,6 +2157,8 @@ bool matroska_segment_c::TrackInit( mkv_track_t * p_tk )
 
             if (i_codec == VLC_CODEC_COOK || i_codec == VLC_CODEC_ATRAC3)
                 p_tk->fmt.audio.i_blockalign = p_realaudio->i_subpacket_size;
+            else // VLC_CODEC_RA_288
+                p_tk->fmt.audio.i_blockalign = p_realaudio->coded_frame_size;
 
             p_tk->fmt.audio.i_rate          = p_realaudio->i_rate;
             p_tk->fmt.audio.i_bitspersample = p_realaudio->i_bitspersample;

modules/demux/mkv/util.cpp

@@ -438,7 +438,7 @@ int32_t Cook_PrivateTrackData::Init()
     bytes.skip(12);                     // unknown2
     bytes.skip(2);                      // unknown3
     bytes.skip(2);                      // flavor
-    bytes.skip(4);                      // coded_frame_size
+    coded_frame_size = bytes.GetBE32(); // coded_frame_size
     bytes.skip(3*4);                    // unknown4
     i_sub_packet_h   = bytes.GetBE16(); // sub_packet_h
     i_frame_size     = bytes.GetBE16(); // frame_size

modules/demux/mkv/util.hpp

@@ -100,6 +100,7 @@ public:
     ~Cook_PrivateTrackData();
     int32_t Init();
 
+    uint32_t coded_frame_size;
     uint16_t i_sub_packet_h;
     uint16_t i_frame_size;
     uint16_t i_subpacket_size;