1 files changed, 472 insertions, 0 deletions
diff --git a/lib/libucsi/mpeg/metadata_descriptor.h b/lib/libucsi/mpeg/metadata_descriptor.h
new file mode 100644
index 0000000..5b91e05
--- /dev/null
+++ b/lib/libucsi/mpeg/metadata_descriptor.h
@@ -0,0 +1,472 @@
+/*
+ * 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_METADATA_DESCRIPTOR
+#define _UCSI_MPEG_METADATA_DESCRIPTOR 1
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <libucsi/descriptor.h>
+#include <libucsi/endianops.h>
+
+/**
+ * Values for the decoder_config_flags field.
+ */
+enum {
+	MPEG_DECODER_CONFIG_NONE				= 0x00,
+	MPEG_DECODER_CONFIG_IN_DECODER_CONFIG			= 0x01,
+	MPEG_DECODER_CONFIG_SAME_METADATA_SERVICE		= 0x02,
+	MPEG_DECODER_CONFIG_DSMCC				= 0x03,
+	MPEG_DECODER_CONFIG_SAME_PROGRAM			= 0x04,
+};
+
+/**
+ * mpeg_metadata_descriptor structure.
+ */
+struct mpeg_metadata_descriptor {
+	struct descriptor d;
+
+	uint16_t metadata_application_format;
+	/* struct mpeg_metadata_descriptor_application_format_identifier appid */
+	/* uint8_t metadata_format */
+	/* struct mpeg_metadata_descriptor_format_identifier formid */
+	/* struct mpeg_metadata_descriptor_flags flags */
+	/* struct mpeg_metadata_descriptor_service_identifier service_identifier */
+	/* struct mpeg_metadata_descriptor_decoder_config decoder_config */
+	/* struct mpeg_metadata_descriptor_decoder_config_id_record decoder_config_id_record */
+	/* struct mpeg_metadata_descriptor_decoder_config_service_id decoder_config_service_id */
+	/* struct mpeg_metadata_descriptor_decoder_config_reserved decoder_config_reserved */
+	/* uint8_t private_data[] */
+} __ucsi_packed;
+
+/**
+ * appid field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_application_format_identifier {
+	uint32_t id;
+} __ucsi_packed;
+
+/**
+ * formid field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_format_identifier {
+	uint32_t id;
+} __ucsi_packed;
+
+/**
+ * Flags field of a metadata_descriptor
+ */
+struct mpeg_metadata_descriptor_flags {
+	uint8_t metadata_service_id;
+  EBIT3(uint8_t decoder_config_flags				: 3;  ,
+	uint8_t dsm_cc_flag					: 1;  ,
+	uint8_t reserved					: 4;  );
+} __ucsi_packed;
+
+/**
+ * service_identifier field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_service_identifier {
+	uint8_t service_identification_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * decoder_config field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_decoder_config {
+	uint8_t decoder_config_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * decoder_config_id_record field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_decoder_config_id_record {
+	uint8_t decoder_config_id_record_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+/**
+ * decoder_config_service_id field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_decoder_config_service_id {
+	uint8_t decoder_config_metadata_service_id;
+} __ucsi_packed;
+
+/**
+ * decoder_config_reserved field of a metadata_descriptor.
+ */
+struct mpeg_metadata_descriptor_decoder_config_reserved {
+	uint8_t reserved_data_length;
+	/* uint8_t data[] */
+} __ucsi_packed;
+
+
+
+
+/**
+ * Process an mpeg_metadata_descriptor.
+ *
+ * @param d Generic descriptor.
+ * @return Pointer to an mpeg_metadata_descriptor, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor*
+	mpeg_metadata_descriptor_codec(struct descriptor* d)
+{
+	uint32_t pos = 2;
+	uint8_t *buf = (uint8_t*) d;
+	uint32_t len = d->len + 2;
+	struct mpeg_metadata_descriptor_flags *flags;
+	int id;
+
+	if (len < sizeof(struct mpeg_metadata_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+1))
+		return NULL;
+
+	id = buf[pos];
+	pos++;
+	if (id == 0xff) {
+		if (len < (pos+4))
+			return NULL;
+		bswap32(buf+pos);
+		pos += 4;
+	}
+
+	if (len < (pos + sizeof(struct mpeg_metadata_descriptor_flags)))
+		return NULL;
+	flags = (struct mpeg_metadata_descriptor_flags*) (buf+pos);
+	pos += sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if (flags->dsm_cc_flag == 1) {
+		if (len < (pos+1))
+			return NULL;
+		if (len < (pos+1+buf[pos]))
+			return NULL;
+		pos += 1 + buf[pos];
+	}
+
+	if (flags->decoder_config_flags == 1) {
+		if (len < (pos+1))
+			return NULL;
+		if (len < (pos+1+buf[pos]))
+			return NULL;
+		pos += 1 + buf[pos];
+	}
+
+	if (flags->decoder_config_flags == 3) {
+		if (len < (pos+1))
+			return NULL;
+		if (len < (pos+1+buf[pos]))
+			return NULL;
+		pos += 1 + buf[pos];
+	}
+
+	if (flags->decoder_config_flags == 4) {
+		if (len < (pos+1))
+			return NULL;
+		pos++;
+	}
+
+	if ((flags->decoder_config_flags == 5) ||
+	    (flags->decoder_config_flags == 6)) {
+		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_metadata_descriptor*) d;
+}
+
+/**
+ * Accessor for pointer to appid field of an mpeg_metadata_descriptor.
+ *
+ * @param d The mpeg_metadata_descriptor structure.
+ * @return The pointer, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_application_format_identifier*
+	mpeg_metadata_descriptor_appid(struct mpeg_metadata_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor);
+
+	if (d->metadata_application_format != 0xffff)
+		return NULL;
+	return (struct mpeg_metadata_descriptor_application_format_identifier*) buf;
+}
+
+/**
+ * Accessor for metadata_format field of an mpeg_metadata_descriptor.
+ *
+ * @param d The mpeg_metadata_descriptor structure.
+ * @return The pointer, or NULL on error.
+ */
+static inline uint8_t
+	mpeg_metadata_descriptor_metadata_format(struct mpeg_metadata_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor);
+
+	if (d->metadata_application_format == 0xffff)
+		buf+=4;
+	return *buf;
+}
+
+/**
+ * Accessor for pointer to formid field of an mpeg_metadata_descriptor.
+ *
+ * @param d The mpeg_metadata_descriptor structure.
+ * @return The pointer, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_format_identifier*
+        mpeg_metadata_descriptor_formid(struct mpeg_metadata_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor);
+
+	if (d->metadata_application_format == 0xffff)
+		buf+=4;
+	if (*buf != 0xff)
+		return NULL;
+
+	return (struct mpeg_metadata_descriptor_format_identifier*) (buf+1);
+}
+
+/**
+ * Accessor for flags field of an mpeg_metadata_descriptor.
+ *
+ * @param d The mpeg_metadata_descriptor structure.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_flags*
+	mpeg_metadata_descriptor_flags(struct mpeg_metadata_descriptor *d)
+{
+	uint8_t *buf = (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor);
+
+	if (d->metadata_application_format == 0xffff)
+		buf+=4;
+	if (*buf == 0xff)
+		buf+=4;
+
+	return (struct mpeg_metadata_descriptor_flags*) buf;
+}
+
+
+/**
+ * Accessor for service_identifier field of an mpeg_metadata_descriptor.
+ *
+ * @param flags Pointer to the mpeg_metadata_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_service_identifier*
+ 	mpeg_metadata_descriptor_sevice_identifier(struct mpeg_metadata_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if (flags->dsm_cc_flag!=1)
+		return NULL;
+
+	return (struct mpeg_metadata_descriptor_service_identifier *) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_metadata_descriptor_service_identifier.
+ *
+ * @param d The mpeg_metadata_descriptor_service_identifier structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_metadata_descriptor_service_identifier_data(struct mpeg_metadata_descriptor_service_identifier *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor_service_identifier);
+}
+
+/**
+ * Accessor for decoder_config field of an mpeg_metadata_descriptor.
+ *
+ * @param flags Pointer to the mpeg_metadata_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_decoder_config*
+	mpeg_metadata_descriptor_decoder_config(struct mpeg_metadata_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if (flags->decoder_config_flags != 1)
+		return NULL;
+
+	if (flags->dsm_cc_flag==1)
+		buf += 1 + buf[1];
+
+	return (struct mpeg_metadata_descriptor_decoder_config*) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_metadata_descriptor_service_identifier.
+ *
+ * @param d The mpeg_metadata_descriptor_service_identifier structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_metadata_descriptor_decoder_config_data(struct mpeg_metadata_descriptor_decoder_config *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor_decoder_config);
+}
+
+/**
+ * Accessor for decoder_config_id_record field of an mpeg_metadata_descriptor.
+ *
+ * @param flags Pointer to the mpeg_metadata_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_decoder_config_id_record*
+	mpeg_metadata_descriptor_decoder_config_id_record(struct mpeg_metadata_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if (flags->decoder_config_flags != 3)
+		return NULL;
+
+	if (flags->dsm_cc_flag==1)
+		buf += 1 + buf[1];
+
+	return (struct mpeg_metadata_descriptor_decoder_config_id_record *) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_metadata_descriptor_decoder_config_id_record.
+ *
+ * @param d The mpeg_metadata_descriptor_decoder_config_id_record structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_metadata_descriptor_decoder_config_id_record_data(struct mpeg_metadata_descriptor_decoder_config_id_record *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor_decoder_config_id_record);
+}
+
+/**
+ * Accessor for decoder_config_service_id field of an mpeg_metadata_descriptor.
+ *
+ * @param flags Pointer to the mpeg_metadata_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_decoder_config_service_id*
+	mpeg_metadata_descriptor_decoder_config_service_id(struct mpeg_metadata_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if (flags->decoder_config_flags != 4)
+		return NULL;
+
+	if (flags->dsm_cc_flag==1)
+		buf += 1 + buf[1];
+
+	return (struct mpeg_metadata_descriptor_decoder_config_service_id *) buf;
+}
+
+/**
+ * Accessor for decoder_config_reserved field of an mpeg_metadata_descriptor.
+ *
+ * @param flags Pointer to the mpeg_metadata_descriptor_flags.
+ * @return Pointer to the field, or NULL on error.
+ */
+static inline struct mpeg_metadata_descriptor_decoder_config_reserved*
+	mpeg_metadata_descriptor_decoder_config_reserved(struct mpeg_metadata_descriptor_flags *flags)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+
+	if ((flags->decoder_config_flags != 5) && (flags->decoder_config_flags != 6))
+		return NULL;
+
+	if (flags->dsm_cc_flag==1)
+		buf += 1 + buf[1];
+
+	return (struct mpeg_metadata_descriptor_decoder_config_reserved *) buf;
+}
+
+/**
+ * Accessor for data field of an mpeg_metadata_descriptor_decoder_config_reserved.
+ *
+ * @param d The mpeg_metadata_descriptor_decoder_config_reserved structure.
+ * @return Pointer to the field.
+ */
+static inline uint8_t*
+	mpeg_metadata_descriptor_decoder_config_reserved_data(struct mpeg_metadata_descriptor_decoder_config_reserved *d)
+{
+	return (uint8_t*) d + sizeof(struct mpeg_metadata_descriptor_decoder_config_reserved);
+}
+
+/**
+ * Accessor for private_data field of an mpeg_metadata_descriptor.
+ *
+ * @param d The mpeg_metadata_descriptor structure.
+ * @param flags Pointer to the mpeg_metadata_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_metadata_descriptor_private_data(struct mpeg_metadata_descriptor *d,
+					      struct mpeg_metadata_descriptor_flags *flags,
+					      int *length)
+{
+	uint8_t *buf = (uint8_t*) flags + sizeof(struct mpeg_metadata_descriptor_flags);
+	uint8_t *end = (uint8_t*) d + d->d.len + 2;
+
+
+	if (flags->dsm_cc_flag==1)
+		buf += 1 + buf[1];
+	if (flags->decoder_config_flags==1)
+		buf += 1 + buf[1];
+	if (flags->decoder_config_flags==3)
+		buf += 1 + buf[1];
+	if (flags->decoder_config_flags==4)
+		buf++;
+	if ((flags->decoder_config_flags==5)||(flags->decoder_config_flags==6))
+		buf += 1 + buf[1];
+
+	*length = end - buf;
+	return buf;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif