[libdvbpsi-devel] Add 0x41 descriptor support
Roberto Corno
git at videolan.org
Wed May 30 16:17:55 CEST 2012
libdvbpsi | branch: master | Roberto Corno <corno.roberto at gmail.com> | Tue May 22 10:56:29 2012 +0200| [943165fe6bcee8c70ecd5f2f7a63755b099da1da] | committer: Jean-Paul Saman
Add 0x41 descriptor support
Slightly modified before applying.
Signed-off-by: Jean-Paul Saman <jean-paul.saman at m2x.nl>
> http://git.videolan.org/gitweb.cgi/libdvbpsi.git/?a=commit;h=943165fe6bcee8c70ecd5f2f7a63755b099da1da
---
src/Makefile.am | 2 +
src/descriptors/dr.h | 1 +
src/descriptors/dr_41.c | 120 +++++++++++++++++++++++++++++++++++++++++++++++
src/descriptors/dr_41.h | 104 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 227 insertions(+)
diff --git a/src/Makefile.am b/src/Makefile.am
index 0d5b3f3..87c2fa9 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -37,6 +37,7 @@ pkginclude_HEADERS = dvbpsi.h psi.h descriptor.h demux.h \
descriptors/dr_13.h \
descriptors/dr_14.h \
descriptors/dr_40.h \
+ descriptors/dr_41.h \
descriptors/dr_42.h \
descriptors/dr_43.h \
descriptors/dr_44.h \
@@ -77,6 +78,7 @@ descriptors_src = descriptors/dr_02.c \
descriptors/dr_13.c \
descriptors/dr_14.c \
descriptors/dr_40.c \
+ descriptors/dr_41.c \
descriptors/dr_42.c \
descriptors/dr_43.c \
descriptors/dr_44.c \
diff --git a/src/descriptors/dr.h b/src/descriptors/dr.h
index 93b27ee..5e71541 100644
--- a/src/descriptors/dr.h
+++ b/src/descriptors/dr.h
@@ -47,6 +47,7 @@
#include "dr_0e.h"
#include "dr_0f.h"
#include "dr_40.h"
+#include "dr_41.h"
#include "dr_42.h"
#include "dr_43.h"
#include "dr_44.h"
diff --git a/src/descriptors/dr_41.c b/src/descriptors/dr_41.c
new file mode 100644
index 0000000..e30e422
--- /dev/null
+++ b/src/descriptors/dr_41.c
@@ -0,0 +1,120 @@
+/*
+ * dr_41.c
+ * Copyright (C) 2012 VideoLAN
+ *
+ * Authors: rcorno (May 21, 2012)
+ *
+ * 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
+ *
+ *****************************************************************************/
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+
+#if defined(HAVE_INTTYPES_H)
+#include <inttypes.h>
+#elif defined(HAVE_STDINT_H)
+#include <stdint.h>
+#endif
+
+#include "../dvbpsi.h"
+#include "../dvbpsi_private.h"
+#include "../descriptor.h"
+
+#include "dr_41.h"
+
+/*****************************************************************************
+ * dvbpsi_DecodeServiceListDr
+ *****************************************************************************/
+dvbpsi_service_list_dr_t* dvbpsi_DecodeServiceListDr(
+ dvbpsi_descriptor_t * p_descriptor)
+{
+ dvbpsi_service_list_dr_t * p_decoded;
+
+ /* Check the tag */
+ if (p_descriptor->i_tag != 0x41)
+ return NULL;
+
+ /* Don't decode twice */
+ if (p_descriptor->p_decoded)
+ return p_descriptor->p_decoded;
+
+ /* Check the length */
+ unsigned int service_count = p_descriptor->i_length / 3;
+ if ((p_descriptor->i_length < 1) ||
+ (p_descriptor->i_length % 3 != 0) ||
+ (service_count>63))
+ return NULL;
+
+ /* Allocate memory */
+ p_decoded = (dvbpsi_service_list_dr_t*)calloc(1, sizeof(dvbpsi_service_list_dr_t));
+ if (!p_decoded)
+ return NULL;
+
+ /* Decode data */
+ p_decoded->i_service_count = service_count;
+
+ for (uint8_t i = 0; i < p_decoded->i_service_count; i++ )
+ {
+ p_decoded->i_service[i].i_service_id = ((uint16_t)(p_descriptor->p_data[i*3]) << 8)
+ | p_descriptor->p_data[i*3+1];
+ p_decoded->i_service[i].i_service_type = p_descriptor->p_data[i*3+2];
+ }
+
+ p_descriptor->p_decoded = (void*)p_decoded;
+
+ return p_decoded;
+}
+
+
+/*****************************************************************************
+ * dvbpsi_GenServiceListDr
+ *****************************************************************************/
+dvbpsi_descriptor_t * dvbpsi_GenServiceListDr(
+ dvbpsi_service_list_dr_t * p_decoded,
+ bool b_duplicate)
+{
+ /* Check the length */
+ if (p_decoded->i_service_count > 63)
+ return NULL;
+
+ /* Create the descriptor */
+ dvbpsi_descriptor_t * p_descriptor =
+ dvbpsi_NewDescriptor(0x83, p_decoded->i_service_count*3, NULL);
+ if (!p_descriptor)
+ return NULL;
+
+ /* Encode data */
+ for (uint8_t i = 0; i < p_decoded->i_service_count; i++)
+ {
+ p_descriptor->p_data[i*3] = p_decoded->i_service[i].i_service_id >> 8;
+ p_descriptor->p_data[i*3+1] = p_decoded->i_service[i].i_service_id;
+ p_descriptor->p_data[i*3+2] = p_decoded->i_service[i].i_service_type;
+ }
+
+ if (b_duplicate)
+ {
+ /* Duplicate decoded data */
+ p_descriptor->p_decoded =
+ dvbpsi_DuplicateDecodedDescriptor(p_descriptor->p_decoded,
+ sizeof(dvbpsi_service_list_dr_t));
+ }
+
+ return p_descriptor;
+}
diff --git a/src/descriptors/dr_41.h b/src/descriptors/dr_41.h
new file mode 100644
index 0000000..dc7b171
--- /dev/null
+++ b/src/descriptors/dr_41.h
@@ -0,0 +1,104 @@
+/*****************************************************************************
+ * dr_41.h
+ * Copyright (C) 2012 VideoLAN
+ *
+ * Authors: rcorno (May 21, 2012)
+ *
+ * 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
+ *
+ *****************************************************************************/
+
+/*!
+ * \file <dr_41.h>
+ * \author Corno Roberto <corno.roberto at gmail.com>
+ * \brief Application interface for the DVB "service list"
+ * descriptor decoder and generator.
+ *
+ * Application interface for the DVB "service list" descriptor
+ * decoder and generator. This descriptor's definition can be found in
+ * ETSI EN 300 468 section 6.2.35.
+ */
+
+#ifndef DR_41_H_
+#define DR_41_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*****************************************************************************
+ * dvbpsi_network_name_dr_t
+ *****************************************************************************/
+/*!
+ * \struct dvbpsi_service_list_dr_t
+ * \brief "service list" descriptor structure.
+ *
+ * This structure is used to store a decoded "service list"
+ * descriptor. (ETSI EN 300 468 section 6.2.35).
+ */
+/*!
+ * \typedef struct dvbpsi_service_list_dr_s dvbpsi_service_list_dr_t
+ * \brief dvbpsi_service_list_dr_t type definition.
+ */
+typedef struct dvbpsi_service_list_dr_s
+{
+ uint8_t i_service_count; /*!< length of the i_service_list
+ array */
+ struct {
+ uint16_t i_service_id; /*!< service id */
+ uint8_t i_service_type; /*!< service type */
+ } i_service[64];
+
+} dvbpsi_service_list_dr_t;
+
+/*****************************************************************************
+ * dvbpsi_DecodeServiceListDr
+ *****************************************************************************/
+/*!
+ * \fn dvbpsi_service_list_dr_t * dvbpsi_DecodeServiceListDr(
+ dvbpsi_descriptor_t * p_descriptor)
+ * \brief "service list" descriptor decoder.
+ * \param p_descriptor pointer to the descriptor structure
+ * \return a pointer to a new "service list" descriptor structure
+ * which contains the decoded data.
+ */
+dvbpsi_service_list_dr_t* dvbpsi_DecodeServiceListDr(
+ dvbpsi_descriptor_t * p_descriptor);
+
+
+/*****************************************************************************
+ * dvbpsi_GenServiceListDr
+ *****************************************************************************/
+/*!
+ * \fn dvbpsi_descriptor_t * dvbpsi_GenServiceListDr(
+ dvbpsi_service_list_dr_t * p_decoded, int b_duplicate)
+ * \brief "service list" descriptor generator.
+ * \param p_decoded pointer to a decoded "service list" descriptor
+ * structure
+ * \param b_duplicate if non zero then duplicate the p_decoded structure into
+ * the descriptor
+ * \return a pointer to a new descriptor structure which contains encoded data.
+ */
+dvbpsi_descriptor_t * dvbpsi_GenServiceListDr(
+ dvbpsi_service_list_dr_t * p_decoded,
+ bool b_duplicate);
+
+#ifdef __cplusplus
+};
+#endif
+
+#else
+#error "Multiple inclusions of dr_41.h"
+#endif /* DR_41_H_ */
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