wtv: display warning if scrambled stream is detected

Originally committed as revision 26197 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/wtv.c

@@ -85,6 +85,8 @@ static const ff_asf_guid EVENTID_CtxADescriptorSpanningEvent =
     {0xE6,0xA2,0xB4,0x3A,0x47,0x42,0x34,0x4B,0x89,0x6C,0x30,0xAF,0xA5,0xD2,0x1C,0x24};
 static const ff_asf_guid EVENTID_CSDescriptorSpanningEvent =
     {0xD9,0x79,0xE7,0xEf,0xF0,0x97,0x86,0x47,0x80,0x0D,0x95,0xCF,0x50,0x5D,0xDC,0x66};
+static const ff_asf_guid EVENTID_DVBScramblingControlSpanningEvent =
+    {0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B};
 static const ff_asf_guid EVENTID_StreamIDSpanningEvent =
     {0x68,0xAB,0xF1,0xCA,0x53,0xE1,0x41,0x4D,0xA6,0xB3,0xA7,0xC9,0x98,0xDB,0x75,0xEE};
 static const ff_asf_guid EVENTID_TeletextSpanningEvent =
@@ -394,6 +396,14 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
                 consumed += buf_size;
                 ff_parse_mpeg2_descriptor(s, st, 0, &pbuf, buf + buf_size, 0, 0, 0, 0);
             }
+        } else if (!ff_guidcmp(g, EVENTID_DVBScramblingControlSpanningEvent)) {
+            int stream_index = ff_find_stream_index(s, sid);
+            if (stream_index >= 0) {
+                url_fskip(pb, 12);
+                if (get_le32(pb))
+                    av_log(s, AV_LOG_WARNING, "DVB scrambled stream detected (st:%d), decoding will likely fail\n", stream_index);
+                consumed += 16;
+            }
         } else if (!ff_guidcmp(g, EVENTID_LanguageSpanningEvent)) {
             int stream_index = ff_find_stream_index(s, sid);
             if (stream_index >= 0) {
@@ -437,7 +447,6 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p
             !ff_guidcmp(g, /* EVENTID_ChannelChangeSpanningEvent */ (const ff_asf_guid){0xE5,0xC5,0x67,0x90,0x5C,0x4C,0x05,0x42,0x86,0xC8,0x7A,0xFE,0x20,0xFE,0x1E,0xFA}) ||
             !ff_guidcmp(g, /* EVENTID_ChannelInfoSpanningEvent */ (const ff_asf_guid){0x80,0x6D,0xF3,0x41,0x32,0x41,0xC2,0x4C,0xB1,0x21,0x01,0xA4,0x32,0x19,0xD8,0x1B}) ||
             !ff_guidcmp(g, /* EVENTID_ChannelTypeSpanningEvent */ (const ff_asf_guid){0x51,0x1D,0xAB,0x72,0xD2,0x87,0x9B,0x48,0xBA,0x11,0x0E,0x08,0xDC,0x21,0x02,0x43}) ||
-            !ff_guidcmp(g, /* EVENTID_DVBScramblingControlSpanningEvent */ (const ff_asf_guid){0xC4,0xE1,0xD4,0x4B,0xA1,0x90,0x09,0x41,0x82,0x36,0x27,0xF0,0x0E,0x7D,0xCC,0x5B}) ||
             !ff_guidcmp(g, /* EVENTID_PIDListSpanningEvent */ (const ff_asf_guid){0x65,0x8F,0xFC,0x47,0xBB,0xE2,0x34,0x46,0x9C,0xEF,0xFD,0xBF,0xE6,0x26,0x1D,0x5C}) ||
             !ff_guidcmp(g, /* EVENTID_SignalAndServiceStatusSpanningEvent */ (const ff_asf_guid){0xCB,0xC5,0x68,0x80,0x04,0x3C,0x2B,0x49,0xB4,0x7D,0x03,0x08,0x82,0x0D,0xCE,0x51}) ||
             !ff_guidcmp(g, /* EVENTID_StreamTypeSpanningEvent */ (const ff_asf_guid){0xBC,0x2E,0xAF,0x82,0xA6,0x30,0x64,0x42,0xA8,0x0B,0xAD,0x2E,0x13,0x72,0xAC,0x60}) ||