Imported Debian patch 1.1.1+rev1207-1debian/1.1.1+rev1207-1

1 files changed, 356 insertions, 0 deletions

diff --git a/lib/libucsi/mpeg/content_labelling_descriptor.h b/lib/libucsi/mpeg/content_labelling_descriptor.h
new file mode 100644
index 0000000..06738ab
--- /dev/null
+++ b/lib/libucsi/mpeg/content_labelling_descriptor.h
@@ -0,0 +1,356 @@
+/*
+ * 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_CONTENT_LABELLING_DESCRIPTOR
+#define _UCSI_MPEG_CONTENT_LABELLING_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * Possible values for content_time_base_indicator.
+ */
+enum {
+	MPEG_CONTENT_TIME_BASE_STC			= 0x01,
+	MPEG_CONTENT_TIME_BASE_NPT			= 0x02,
+};
+
+/**
+ * mpeg_content_labelling_descriptor structure.
+ */
+struct mpeg_content_labelling_descriptor {
+	struct descriptor d;
+
+	uint16_t metadata_application_format;
+	/* struct mpeg_content_labelling_descriptor_application_format_identifier id */
+	/* struct mpeg_content_labelling_descriptor_flags flags */
+	/* struct mpeg_content_labelling_descriptor_reference_id reference_id */
+	/* struct mpeg_content_labelling_descriptor_time_base time_base */
+	/* struct mpeg_content_labelling_descriptor_content_id content_id */
+	/* struct mpeg_content_labelling_descriptor_time_base_association time_base_assoc */
+	/* uint8_t private_data[] */
+} __ucsi_packed;
+
+/**
+ * id field of a content_labelling_descriptor.
+ */
+struct mpeg_content_labelling_descriptor_application_format_identifier {
+	uint32_t id;
+} __ucsi_packed;
+
+/**
+ * Flags field of a content_labelling_descriptor
+ */
+struct mpeg_content_labelling_descriptor_flags {
+  EBIT3(uint8_t content_reference_id_record_flag		: 1;  ,
+	uint8_t content_time_base_indicator			: 4;  ,
+	uint8_t reserved					: 3;  );
+} __ucsi_packed;
+
+/**
+ * Reference_id field of a content_labelling_descriptor.
+ */
+struct mpeg_content_labelling_descriptor_reference_id {
+	uint8_t content_reference_id_record_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * time_base field of a content_labelling_descriptor.
+ */
+struct mpeg_content_labelling_descriptor_time_base {
+  EBIT2(uint64_t reserved_1					: 7;  ,
+	uint64_t content_time_base_value			:33;  );
+  EBIT2(uint64_t reserved_2					: 7;  ,
+	uint64_t metadata_time_base_value			:33;  );
+} __ucsi_packed;
+
+/**
+ * content_id field of a content_labelling_descriptor.
+ */
+struct mpeg_content_labelling_descriptor_content_id {
+  EBIT2(uint8_t reserved					: 1;  ,
+	uint8_t contentId					: 7;  );
+} __ucsi_packed;
+
+/**
+ * time_base_assoc field of a content_labelling_descriptor.
+ */
+struct mpeg_content_labelling_descriptor_time_base_association {
+	uint8_t time_base_association_data_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+
+
+/**
+ * Process an mpeg_content_labelling_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return Pointer to an mpeg_content_labelling_descriptor, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor*
+	mpeg_content_labelling_descriptor_codec(struct descriptor* d)
+{
+	uint32_t pos = 2;
+	uint8_t *buf = (uint8_t*) d;
+	uint32_t len = d->len + 2;
+	struct mpeg_content_labelling_descriptor_flags *flags;
+	int id;
+
+	if (len < sizeof(struct mpeg_content_labelling_descriptor))
+		return NULL;
+
+	bswap16(buf + pos);
+	id = *((uint16_t*) (buf+pos));
+	pos += 2;
+
+	if (id == 0xffff) {
+		if (len < (pos+4))
+			return NULL;
+		bswap32(buf+pos);
+		pos += 4;
+	}
+
+	if (len < (pos + sizeof(struct mpeg_content_labelling_descriptor_flags)))
+		return NULL;
+	flags = (struct mpeg_content_labelling_descriptor_flags*) (buf+pos);
+	pos += sizeof(struct mpeg_content_labelling_descriptor_flags);
+
+	if (flags->content_reference_id_record_flag == 1) {
+		if (len < (pos+1))
+			return NULL;
+		if (len < (pos+1+buf[pos]))
+			return NULL;
+		pos += 1 + buf[pos];
+	}
+
+	if ((flags->content_time_base_indicator == 1) ||
+	    (flags->content_time_base_indicator == 2)) {
+		if (len < (pos + sizeof(struct mpeg_content_labelling_descriptor_time_base)))
+			return NULL;
+		bswap40(buf+pos);
+		bswap40(buf+pos+5);
+		pos += sizeof(struct mpeg_content_labelling_descriptor_time_base);
+	}
+
+	if (flags->content_time_base_indicator == 2) {
+		if (len < (pos + sizeof(struct mpeg_content_labelling_descriptor_content_id)))
+			return NULL;
+		pos += sizeof(struct mpeg_content_labelling_descriptor_content_id);
+	}
+
+	if (flags->content_time_base_indicator > 2) {
+		if (len < (pos+1))
+			return NULL;
+		if (len < (pos+1+buf[pos]))
+			return NULL;
+		pos += 1 + buf[pos];
+	}
+
+	if (len < pos)
+		return NULL;
+
+	return (struct mpeg_content_labelling_descriptor*) d;
+}
+
+/**
+ * Accessor for pointer to id field of an mpeg_content_labelling_descriptor.
+ *
+ * @param d The mpeg_content_labelling_descriptor structure.
+ * @return The pointer, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_application_format_identifier*
+	mpeg_content_labelling_descriptor_id(struct mpeg_content_labelling_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d;
+
+	if (d->metadata_application_format != 0xffff)
+		return NULL;
+	return (struct mpeg_content_labelling_descriptor_application_format_identifier*)
+		(buf + sizeof(struct mpeg_content_labelling_descriptor));
+}
+
+/**
+ * Accessor for pointer to flags field of an mpeg_content_labelling_descriptor.
+ *
+ * @param d The mpeg_content_labelling_descriptor structure.
+ * @return The pointer, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_flags*
+        mpeg_content_labelling_descriptor_flags(struct mpeg_content_labelling_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d + sizeof(struct mpeg_content_labelling_descriptor);
+
+	if (d->metadata_application_format != 0xffff)
+		buf += 4;
+
+	return (struct mpeg_content_labelling_descriptor_flags *) buf;
+}
+
+/**
+ * Accessor for reference_id field of an mpeg_content_labelling_descriptor.
+ *
+ * @param flags Pointer to the mpeg_content_labelling_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_reference_id*
+	mpeg_content_labelling_descriptor_reference_id(struct mpeg_content_labelling_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_content_labelling_descriptor_flags);
+
+	if (flags->content_reference_id_record_flag != 1)
+		return NULL;
+
+	return (struct mpeg_content_labelling_descriptor_reference_id *) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_content_reference_id.
+ *
+ * @param d The mpeg_content_reference_id structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_content_reference_id_data(struct mpeg_content_labelling_descriptor_reference_id *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_content_labelling_descriptor_reference_id);
+}
+
+/**
+ * Accessor for time_base field of an mpeg_content_labelling_descriptor.
+ *
+ * @param flags Pointer to the mpeg_content_labelling_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_time_base*
+	mpeg_content_labelling_descriptor_time_base(struct mpeg_content_labelling_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_content_labelling_descriptor_flags);
+
+	if ((flags->content_time_base_indicator!=1) && (flags->content_time_base_indicator!=2))
+		return NULL;
+
+	if (flags->content_reference_id_record_flag == 1)
+		buf += 1 + buf[1];
+
+	return (struct mpeg_content_labelling_descriptor_time_base *) buf;
+}
+
+/**
+ * Accessor for content_id field of an mpeg_content_labelling_descriptor.
+ *
+ * @param flags Pointer to the mpeg_content_labelling_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_content_id*
+	mpeg_content_labelling_descriptor_content_id(struct mpeg_content_labelling_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_content_labelling_descriptor_flags);
+
+	if (flags->content_time_base_indicator!=2)
+		return NULL;
+
+	if (flags->content_reference_id_record_flag == 1)
+		buf += 1 + buf[1];
+	if ((flags->content_time_base_indicator==1) || (flags->content_time_base_indicator==2))
+		buf += sizeof(struct mpeg_content_labelling_descriptor_time_base);
+
+	return (struct mpeg_content_labelling_descriptor_content_id *) buf;
+}
+
+/**
+ * Accessor for time_base_association field of an mpeg_content_labelling_descriptor.
+ *
+ * @param flags Pointer to the mpeg_content_labelling_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_content_labelling_descriptor_time_base_association*
+	mpeg_content_labelling_descriptor_time_base_assoc(struct mpeg_content_labelling_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_content_labelling_descriptor_flags);
+
+	if (flags->content_time_base_indicator<3)
+		return NULL;
+
+	if (flags->content_reference_id_record_flag == 1)
+		buf += 1 + buf[1];
+	if ((flags->content_time_base_indicator==1) || (flags->content_time_base_indicator==2))
+		buf += sizeof(struct mpeg_content_labelling_descriptor_time_base);
+	if (flags->content_time_base_indicator==2)
+		buf += sizeof(struct mpeg_content_labelling_descriptor_content_id);
+
+	return (struct mpeg_content_labelling_descriptor_time_base_association *) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_time_base_association.
+ *
+ * @param d The mpeg_time_base_association structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_time_base_association_data(struct mpeg_content_labelling_descriptor_time_base_association *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_content_labelling_descriptor_time_base_association);
+}
+
+
+/**
+ * Accessor for private_data field of an mpeg_content_labelling_descriptor.
+ *
+ * @param d The mpeg_content_labelling_descriptor structure.
+ * @param flags Pointer to the mpeg_content_labelling_descriptor_flags.
+ * @param length Where the number of bytes in the field should be stored.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_content_labelling_descriptor_data(struct mpeg_content_labelling_descriptor *d,
+					       struct mpeg_content_labelling_descriptor_flags *flags,
+					       int *length)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_content_labelling_descriptor_flags);
+	uint8_t *end = (uint8_t*) d + d->d.len + 2;
+
+	if (flags->content_reference_id_record_flag == 1)
+		buf += 1 + buf[1];
+	if ((flags->content_time_base_indicator==1) || (flags->content_time_base_indicator==2))
+		buf += sizeof(struct mpeg_content_labelling_descriptor_time_base);
+	if (flags->content_time_base_indicator==2)
+		buf += sizeof(struct mpeg_content_labelling_descriptor_content_id);
+	if (flags->content_time_base_indicator<3)
+		buf += 1 + buf[1];
+
+	*length = end - buf;
+
+	return buf;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif