add support for the MPEG MultiplexBuffer descriptor

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

misc/dr.xml

@@ -148,6 +148,11 @@
     <integer name="i_ext_es_id" bitcount="16" default="0"/>
   </descriptor>
 
+  <descriptor name="MultiplexBuffer" sname="mpeg_mux_buf" gen_args="1">
+    <integer name="i_mb_buf_size" bitcount="24" default="0"/>
+    <integer name="i_tb_leak_rate" bitcount="24" default="0"/>
+  </descriptor>
+
   <descriptor name="network name" sname="dvb_network_name">
     <array name="i_name_byte" len_name="i_name_length" min_size="0" />
   </descriptor>

misc/test_dr.c

@@ -950,6 +950,40 @@ static int main_mpeg_ext_es_id_0(void)
   return i_err;
 }
 
+/* MultiplexBuffer */
+static int main_mpeg_mux_buf_0(void)
+{
+  BOZO_VARS(mpeg_mux_buf);
+  BOZO_START(MultiplexBuffer);
+
+
+  #define dvbpsi_gen_mpeg_mux_buf_dr(x,y) \
+    dvbpsi_gen_mpeg_mux_buf_dr(x)
+
+  /* check i_mb_buf_size */
+  BOZO_init_integer(i_mb_buf_size, 0);
+  BOZO_init_integer(i_tb_leak_rate, 0);
+  BOZO_begin_integer(i_mb_buf_size, 24)
+    BOZO_DOJOB(mpeg_mux_buf);
+    BOZO_check_integer(i_mb_buf_size, 24)
+    BOZO_CLEAN();
+  BOZO_end_integer(i_mb_buf_size, 24)
+
+  /* check i_tb_leak_rate */
+  BOZO_init_integer(i_mb_buf_size, 0);
+  BOZO_init_integer(i_tb_leak_rate, 0);
+  BOZO_begin_integer(i_tb_leak_rate, 24)
+    BOZO_DOJOB(mpeg_mux_buf);
+    BOZO_check_integer(i_tb_leak_rate, 24)
+    BOZO_CLEAN();
+  BOZO_end_integer(i_tb_leak_rate, 24)
+
+
+  BOZO_END(MultiplexBuffer);
+
+  return i_err;
+}
+
 /* network name */
 static int main_dvb_network_name_0(void)
 {
@@ -2620,6 +2654,7 @@ int main(void)
   i_err |= main_mpeg_sl_0();
   i_err |= main_mpeg_fmc_0();
   i_err |= main_mpeg_ext_es_id_0();
+  i_err |= main_mpeg_mux_buf_0();
   i_err |= main_dvb_network_name_0();
   i_err |= main_dvb_service_list_0();
   i_err |= main_dvb_stuffing_0();

src/Makefile.am

@@ -50,6 +50,7 @@ mpegdrinclude_HEADERS = descriptors/mpeg/dr_02.h \
                      descriptors/mpeg/dr_1e.h \
                      descriptors/mpeg/dr_1f.h \
                      descriptors/mpeg/dr_20.h \
+                     descriptors/mpeg/dr_23.h \
                      descriptors/mpeg/dr_24.h
 
 dvbdrincludedir = $(pkgincludedir)/dvb
@@ -126,6 +127,7 @@ descriptors_src = descriptors/mpeg/dr_02.c \
                   descriptors/mpeg/dr_1e.c \
                   descriptors/mpeg/dr_1f.c \
                   descriptors/mpeg/dr_20.c \
+                  descriptors/mpeg/dr_23.c \
                   descriptors/mpeg/dr_24.c \
 		  descriptors/dvb/dr_40.c \
 		  descriptors/dvb/dr_41.c \

src/descriptors/dr.h

@@ -92,6 +92,7 @@
 #include "mpeg/dr_1e.h"
 #include "mpeg/dr_1f.h"
 #include "mpeg/dr_20.h"
+#include "mpeg/dr_23.h"
 #include "mpeg/dr_24.h"
 #include "custom/dr_83_eacem.h"
 #include "custom/dr_8a_scte.h"

src/descriptors/mpeg/dr_23.c

+/*
+Copyright (C) 2016 Daniel Kamil Kozar
+
+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 <stdlib.h>
+#include <stdbool.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_23.h"
+
+dvbpsi_mpeg_mux_buf_dr_t* dvbpsi_decode_mpeg_mux_buf_dr(
+                                      dvbpsi_descriptor_t * p_descriptor)
+{
+    dvbpsi_mpeg_mux_buf_dr_t * p_decoded;
+
+    /* check the tag. */
+    if (!dvbpsi_CanDecodeAsDescriptor(p_descriptor, 0x23))
+        return NULL;
+
+    /* don't decode twice. */
+    if (dvbpsi_IsDescriptorDecoded(p_descriptor))
+        return p_descriptor->p_decoded;
+
+    /* all descriptors of this type must have 6 bytes of payload. */
+    if (p_descriptor->i_length != 6)
+        return NULL;
+
+    p_decoded = malloc(sizeof(*p_decoded));
+    if (!p_decoded)
+        return NULL;
+
+    p_decoded->i_mb_buf_size =  ((p_descriptor->p_data[0] & 0xff) << 16)
+                              | ((p_descriptor->p_data[1] & 0xff) << 8)
+                              | p_descriptor->p_data[2];
+
+    p_decoded->i_tb_leak_rate =  ((p_descriptor->p_data[3] & 0xff) << 16)
+                               | ((p_descriptor->p_data[4] & 0xff) << 8)
+                               | p_descriptor->p_data[5];
+
+    p_descriptor->p_decoded = p_decoded;
+
+    return p_decoded;
+}
+
+dvbpsi_descriptor_t * dvbpsi_gen_mpeg_mux_buf_dr(
+                                      dvbpsi_mpeg_mux_buf_dr_t * p_decoded)
+{
+    dvbpsi_descriptor_t * p_descriptor = dvbpsi_NewDescriptor(0x23, 6, NULL);
+    if (!p_descriptor)
+        return NULL;
+
+    /* encode the data. */
+    p_descriptor->p_data[0] = p_decoded->i_mb_buf_size >> 16;
+    p_descriptor->p_data[1] = p_decoded->i_mb_buf_size >> 8;
+    p_descriptor->p_data[2] = p_decoded->i_mb_buf_size;
+    p_descriptor->p_data[3] = p_decoded->i_tb_leak_rate >> 16;
+    p_descriptor->p_data[4] = p_decoded->i_tb_leak_rate >> 8;
+    p_descriptor->p_data[5] = p_decoded->i_tb_leak_rate;
+
+    return p_descriptor;
+}

src/descriptors/mpeg/dr_23.h

+/*
+Copyright (C) 2016 Daniel Kamil Kozar
+
+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_23.h>
+ * \author Daniel Kamil Kozar <dkk089@gmail.com>
+ * \brief Application interface for the MultiplexBuffer descriptor decoder and
+ * generator.
+ *
+ * Application interface for the MultiplexBuffer descriptor decoder and
+ * generator. This descriptor's definition can be found in ISO/IEC 13818-1
+ * revision 2014/10 section 2.6.52.
+ */
+
+#ifndef _DVBPSI_DR_23_H_
+#define _DVBPSI_DR_23_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*!
+ * \struct dvbpsi_mpeg_mux_buf_dr_s
+ * \brief MultiplexBuffer descriptor structure.
+ *
+ * This structure is used to store a decoded MultiplexBuffer descriptor.
+ * (ISO/IEC 13818-1 section 2.6.52).
+ */
+
+/*!
+ * \typedef struct dvbpsi_mpeg_mux_buf_dr_s dvbpsi_mpeg_mux_buf_dr_t
+ * \brief dvbpsi_mpeg_mux_buf_dr_t type definition.
+ */
+typedef struct dvbpsi_mpeg_mux_buf_dr_s {
+    uint32_t    i_mb_buf_size; /*< MB_buffer_size */
+    uint32_t    i_tb_leak_rate; /*< TB_leak_rate */
+} dvbpsi_mpeg_mux_buf_dr_t;
+
+/*!
+ * \brief MultiplexBuffer descriptor decoder.
+ * \param p_descriptor pointer to the descriptor structure
+ * \return A pointer to a new MultiplexBuffer descriptor structure which contains
+ * the decoded data.
+ */
+dvbpsi_mpeg_mux_buf_dr_t* dvbpsi_decode_mpeg_mux_buf_dr(
+                                      dvbpsi_descriptor_t * p_descriptor);
+
+/*!
+ * \brief MultiplexBuffer descriptor generator.
+ * \param p_decoded pointer to a decoded MultiplexBuffer descriptor structure.
+ * \return a pointer to a new descriptor structure which contains encoded data.
+ */
+dvbpsi_descriptor_t * dvbpsi_gen_mpeg_mux_buf_dr(
+                                      dvbpsi_mpeg_mux_buf_dr_t * p_decoded);
+
+#ifdef __cplusplus
+}
+#endif
+
+#else
+#error "Multiple inclusions of dr_23.h"
+#endif