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-rw-r--r--lib/libucsi/mpeg/ca_descriptor.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/ca_descriptor.h b/lib/libucsi/mpeg/ca_descriptor.h
new file mode 100644
index 0000000..88a65dd
--- /dev/null
+++ b/lib/libucsi/mpeg/ca_descriptor.h
@@ -0,0 +1,91 @@
+/*
+ * section and descriptor parser
+ *
+ * Copyright (C) 2005 Kenneth Aafloy (kenneth@linuxtv.org)
+ * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#ifndef _UCSI_MPEG_CA_DESCRIPTOR
+#define _UCSI_MPEG_CA_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * mpeg_ca_descriptor structure
+ */
+struct mpeg_ca_descriptor {
+ struct descriptor d;
+
+ uint16_t ca_system_id;
+ EBIT2(uint16_t reserved : 3; ,
+ uint16_t ca_pid : 13; );
+ /* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * Process an mpeg_ca_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return Pointer to an mpeg_ca_descriptor, or NULL on error.
+ */
+static inline struct mpeg_ca_descriptor*
+ mpeg_ca_descriptor_codec(struct descriptor* d)
+{
+ if (d->len < (sizeof(struct mpeg_ca_descriptor) - 2))
+ return NULL;
+
+ bswap16((uint8_t*) d + 2);
+ bswap16((uint8_t*) d + 4);
+
+ return (struct mpeg_ca_descriptor*) d;
+}
+
+/**
+ * Accessor for pointer to data field of an mpeg_ca_descriptor.
+ *
+ * @param d The mpeg_ca_descriptor structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t *
+ mpeg_ca_descriptor_data(struct mpeg_ca_descriptor *d)
+{
+ return (uint8_t *) d + sizeof(struct mpeg_ca_descriptor);
+}
+
+/**
+ * Determine length of data field of an mpeg_ca_descriptor.
+ *
+ * @param d The mpeg_ca_descriptor structure.
+ * @return Length of the field in bytes.
+ */
+static inline int
+ mpeg_ca_descriptor_data_length(struct mpeg_ca_descriptor *d)
+{
+ return d->d.len - 4;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif