From 0c773b8cddbde4548c6d657c47de0fab82ba9e6f Mon Sep 17 00:00:00 2001
From: Stefan Ringel <linuxtv@stefanringel.de>
Date: Thu, 10 Apr 2014 16:03:07 +0200
Subject: [PATCH] mpegts: add scrambling descriptor

https://bugzilla.gnome.org/show_bug.cgi?id=727560
---
 docs/libs/gst-plugins-bad-libs-sections.txt |  3 ++
 gst-libs/gst/mpegts/gst-dvb-descriptor.c    | 31 +++++++++++++++++++++
 gst-libs/gst/mpegts/gst-dvb-descriptor.h    | 19 +++++++++++++
 3 files changed, 53 insertions(+)

diff --git a/docs/libs/gst-plugins-bad-libs-sections.txt b/docs/libs/gst-plugins-bad-libs-sections.txt
index 46ba28a869..84e74d5d8e 100644
--- a/docs/libs/gst-plugins-bad-libs-sections.txt
+++ b/docs/libs/gst-plugins-bad-libs-sections.txt
@@ -307,6 +307,9 @@ gst_mpegts_descriptor_parse_dvb_frequency_list
 <SUBSECTION data_broadcast>
 GstMpegTsDataBroadcastDescriptor
 gst_mpegts_descriptor_parse_dvb_data_broadcast
+<SUBSECTION scrambling>
+GstMpegTsDvbScramblingModeType
+gst_mpegts_descriptor_parse_dvb_scrambling
 <SUBSECTION data_broadcast_id>
 gst_mpegts_descriptor_parse_dvb_data_broadcast_id
 <SUBSECTION parental_rating>
diff --git a/gst-libs/gst/mpegts/gst-dvb-descriptor.c b/gst-libs/gst/mpegts/gst-dvb-descriptor.c
index 3daec78387..76e941388e 100644
--- a/gst-libs/gst/mpegts/gst-dvb-descriptor.c
+++ b/gst-libs/gst/mpegts/gst-dvb-descriptor.c
@@ -1386,6 +1386,37 @@ gst_mpegts_descriptor_parse_dvb_data_broadcast (const GstMpegTsDescriptor
   return TRUE;
 }
 
+/* GST_MTS_DESC_DVB_SCRAMBLING (0x65) */
+/**
+ * gst_mpegts_descriptor_parse_dvb_scrambling:
+ * @descriptor: a %GST_MTS_DESC_DVB_SCRAMBLING #GstMpegTsDescriptor
+ * @scrambling_mode: (out): This 8-bit field identifies the selected
+ * mode of the scrambling algorithm (#GstMpegTsDVBScramblingModeType).
+ * The technical details of the scrambling algorithm are available only
+ * to bona-fide users upon signature of a Non Disclosure Agreement (NDA)
+ * administered by the DVB Common Scrambling Algorithm Custodian.
+ *
+ * Parses out the scrambling mode from the @descriptor.
+ *
+ * Returns: %TRUE if the parsing happened correctly, else %FALSE.
+ */
+gboolean
+gst_mpegts_descriptor_parse_dvb_scrambling (const GstMpegTsDescriptor *
+    descriptor, GstMpegTsDVBScramblingModeType * scrambling_mode)
+{
+  guint8 *data;
+
+  g_return_val_if_fail (descriptor != NULL && scrambling_mode != NULL, FALSE);
+  __common_desc_checks_exact (descriptor, GST_MTS_DESC_DVB_SCRAMBLING, 1,
+      FALSE);
+
+  data = (guint8 *) descriptor->data + 2;
+
+  *scrambling_mode = *data;
+
+  return TRUE;
+}
+
 /* GST_MTS_DESC_DVB_DATA_BROADCAST_ID (0x66) */
 /**
  * gst_mpegts_descriptor_parse_dvb_data_broadcast_id:
diff --git a/gst-libs/gst/mpegts/gst-dvb-descriptor.h b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
index f65663518d..727dbff53f 100644
--- a/gst-libs/gst/mpegts/gst-dvb-descriptor.h
+++ b/gst-libs/gst/mpegts/gst-dvb-descriptor.h
@@ -658,6 +658,25 @@ struct _GstMpegTsDataBroadcastDescriptor
 gboolean gst_mpegts_descriptor_parse_dvb_data_broadcast (const GstMpegTsDescriptor
               *descriptor, GstMpegTsDataBroadcastDescriptor * res);
 
+/* GST_MTS_DESC_DVB_SCRAMBLING (0x65) */
+typedef enum
+{
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_RESERVED              = 0x00,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CSA1                  = 0x01,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CSA2                  = 0x02,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CSA3_STANDARD         = 0x03,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CSA3_MINIMAL_ENHANCED = 0x04,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CSA3_FULL_ENHANCED    = 0x05,
+  /* 0x06 - 0x0f reserved for future use */
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_CISSA                 = 0x10,
+  /* 0x11 - 0x1f reserved for future DVB-CISSA versions */
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_ATIS_0                = 0x70,
+  GST_MPEGTS_DVB_SCRAMBLING_MODE_ATIS_F                = 0x7f,
+} GstMpegTsDVBScramblingModeType;
+
+gboolean gst_mpegts_descriptor_parse_dvb_scrambling (const GstMpegTsDescriptor * descriptor,
+       GstMpegTsDVBScramblingModeType * scrambling_mode);
+
 /* GST_MTS_DESC_DVB_DATA_BROADCAST_ID (0x66) */
 gboolean gst_mpegts_descriptor_parse_dvb_data_broadcast_id (const GstMpegTsDescriptor
        * descriptor, guint16 * data_broadcast_id, guint8 ** id_selector_bytes, guint8 * len);