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-rw-r--r--drivers/media/platform/coda/coda-h264.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/media/platform/coda/coda-h264.c b/drivers/media/platform/coda/coda-h264.c
new file mode 100644
index 0000000..456773a
--- /dev/null
+++ b/drivers/media/platform/coda/coda-h264.c
@@ -0,0 +1,37 @@
+/*
+ * Coda multi-standard codec IP - H.264 helper functions
+ *
+ * Copyright (C) 2012 Vista Silicon S.L.
+ * Javier Martin, <javier.martin@vista-silicon.com>
+ * Xavier Duret
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+static const u8 coda_filler_nal[14] = { 0x00, 0x00, 0x00, 0x01, 0x0c, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x80 };
+static const u8 coda_filler_size[8] = { 0, 7, 14, 13, 12, 11, 10, 9 };
+
+int coda_h264_padding(int size, char *p)
+{
+ int nal_size;
+ int diff;
+
+ diff = size - (size & ~0x7);
+ if (diff == 0)
+ return 0;
+
+ nal_size = coda_filler_size[diff];
+ memcpy(p, coda_filler_nal, nal_size);
+
+ /* Add rbsp stop bit and trailing at the end */
+ *(p + nal_size - 1) = 0x80;
+
+ return nal_size;
+}

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