[Redbutton-devel] SF.net SVN: redbutton: [162] redbutton-browser/trunk/mpegts.c

[<ski...@us...>]

Revision: 162
          http://svn.sourceforge.net/redbutton/?rev=162&view=rev
Author:   skilvington
Date:     2006-12-18 08:23:09 -0800 (Mon, 18 Dec 2006)

Log Message:
-----------
how we would do CC checking

Modified Paths:
--------------
    redbutton-browser/trunk/mpegts.c

Modified: redbutton-browser/trunk/mpegts.c
===================================================================
--- redbutton-browser/trunk/mpegts.c	2006-12-18 16:09:23 UTC (rev 161)
+++ redbutton-browser/trunk/mpegts.c	2006-12-18 16:23:09 UTC (rev 162)
@@ -50,6 +50,7 @@
 	int stop_parse;			/* stop parsing loop */
 	PESContext *pids[NB_PID_MAX];	/* PIDs we are demuxing */
 	int is_start;			/* is the current packet the first of a frame */
+	int last_cc;			/* last Continuity Check value we saw (<0 => none seen yet) */
 };
 
 /* TS stream handling */
@@ -104,6 +105,9 @@
 
 	ctx->is_start = 0;
 
+	/* last continuity check value (-1 => CC always passes) */
+	ctx->last_cc = -1;
+
 	return ctx;
 }
 
@@ -266,6 +270,7 @@
 handle_packet(MpegTSContext *ctx, const uint8_t *packet)
 {
 	PESContext *pes;
+	int cc, cc_ok;
 	int pid, afc;
 	const uint8_t *p, *p_end;
 
@@ -276,11 +281,14 @@
 
 	ctx->is_start = packet[1] & 0x40;
 
+	/* continuity check */
+	cc = (packet[3] & 0xf);
+	cc_ok = (ctx->last_cc < 0) || (((ctx->last_cc + 1) & 0x0f) == cc);
+	ctx->last_cc = cc;
 #if 0
-	/* continuity check (currently not used) */
-	cc = (packet[3] & 0xf);
-	cc_ok = (tss->last_cc < 0) || ((((tss->last_cc + 1) & 0x0f) == cc));
-	tss->last_cc = cc;
+	/* skip until we find the next start packet */
+	if(!cc_ok && !ctx->is_start)
+		pes->state = MPEGTS_SKIP;
 #endif
 
 	/* skip adaptation field */


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