ETSI EN 301 775 (DVB-VBI)

dvb/vbi.h

@@ -0,0 +1,96 @@
+/*****************************************************************************
+ * vbi.h: ETSI EN 301 775 Carriage of VBI in DVB
+ *****************************************************************************
+ * Copyright (C) 2016 OpenHeadend
+ *
+ * Authors: Christophe Massiot <massiot@via.ecp.fr>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject
+ * to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+/*
+ * Normative references:
+ *  - ETSI EN 300 775 V1.2.1 (2003-05) (carriage of VBI in DVB)
+ */
+
+#ifndef __BITSTREAM_DVB_VBI_H__
+#define __BITSTREAM_DVB_VBI_H__
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/*****************************************************************************
+ * PES data field
+ *****************************************************************************/
+#define DVBVBI_HEADER_SIZE      1
+#define DVBVBI_UNIT_HEADER_SIZE 2
+#define DVBVBI_DATA_IDENTIFIER  0x10
+
+#define DVBVBI_ID_TTX_SUB       0x02
+#define DVBVBI_ID_TTX_NONSUB    0x03
+#define DVBVBI_ID_TTX_INVERTED  0xc0
+#define DVBVBI_ID_VPS           0xc3
+#define DVBVBI_ID_WSS           0xc4
+#define DVBVBI_ID_CEA608        0xc5
+#define DVBVBI_ID_RAWVBI        0xc6
+#define DVBVBI_ID_STUFFING      0xff
+
+#define DVBVBI_LENGTH           0x2c
+
+/*****************************************************************************
+ * Teletext data field
+ *****************************************************************************/
+#define DVBVBITTX_FRAMING_CODE  0xe4
+
+static inline void dvbvbittx_set_field(uint8_t *p, bool field)
+{
+    p[0] |= 0xc0;
+    if (field)
+        p[0] |= 0x20;
+    else
+        p[0] &= ~0x20;
+}
+
+static inline bool dvbvbittx_get_field(const uint8_t *p)
+{
+    return p[0] & 0x20;
+}
+
+static inline void dvbvbittx_set_line(uint8_t *p, uint8_t line)
+{
+    p[0] &= ~0x1f;
+    p[0] |= 0xc0 | (line & 0x1f);
+}
+
+static inline uint8_t dvbvbittx_get_line(const uint8_t *p)
+{
+    return p[0] & 0x1f;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif