New descriptor 0x69 (Program Delivery Control PDC). Programme Delivery Control...

New descriptor 0x69 (Program Delivery Control PDC). Programme Delivery Control (PDC) is a standard (ETS 300 231) to control video recorders using hidden codes in the teletext service. The PDC data indicates to the recorder when a show or program starts. PDC is often used together with StarText, enabling the user to select a programme to record using specially coded teletext programme listings. The combination of features is often called PDC/StarText. More information on: http://en.wikipedia.org/wiki/Programme_Delivery_Control.

src/Makefile.am

@@ -39,6 +39,7 @@ pkginclude_HEADERS = dvbpsi.h psi.h descriptor.h demux.h \
                      descriptors/dr_55.h \
                      descriptors/dr_56.h \
                      descriptors/dr_59.h \
+                     descriptors/dr_69.h \
                      descriptors/dr.h
 
 descriptors_src = descriptors/dr_02.c \
@@ -63,7 +64,8 @@ descriptors_src = descriptors/dr_02.c \
                   descriptors/dr_52.c \
                   descriptors/dr_55.c \
                   descriptors/dr_56.c \
-                  descriptors/dr_59.c
+                  descriptors/dr_59.c \
+                  descriptors/dr_69.c
 
 tables_src = tables/pat.c tables/pat_private.h \
              tables/pmt.c tables/pmt_private.h \

src/descriptors/dr_69.c

+/*****************************************************************************
+ * dr_69.c
+ * (c)2007 VideoLAN
+ * $Id$
+ *
+ * Authors: Jiri Pinkava <master_up@post.cz>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ *****************************************************************************/
+
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.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_69.h"
+
+
+/*****************************************************************************
+ * dvbpsi_DecodePDCDr
+ *****************************************************************************/
+dvbpsi_PDC_dr_t * dvbpsi_DecodePDCDr(dvbpsi_descriptor_t * p_descriptor)
+{
+  dvbpsi_PDC_dr_t * p_decoded;
+
+  /* Check the tag */
+  if(p_descriptor->i_tag != 0x69)
+  {
+    DVBPSI_ERROR_ARG("dr_69 decoder", "bad tag (0x%x)", p_descriptor->i_tag);
+    return NULL;
+  }
+
+  /* Don't decode twice */
+  if(p_descriptor->p_decoded)
+    return p_descriptor->p_decoded;
+
+  /* Decode data and check the length */
+  if( p_descriptor->i_length != 3)
+  {
+    DVBPSI_ERROR_ARG("dr_69 decoder", "bad length (%d)",
+                     p_descriptor->i_length);
+    return NULL;
+  }
+
+  /* Allocate memory */
+  p_decoded = (dvbpsi_PDC_dr_t*)malloc(sizeof(dvbpsi_PDC_dr_t));
+  if(!p_decoded)
+  {
+    DVBPSI_ERROR("dr_69 decoder", "out of memory");
+    return NULL;
+  }
+
+  p_decoded->i_PDC[0] = ((p_descriptor->p_data[0] & 0x0f) << 1) |
+      (p_descriptor->p_data[1] >> 7);
+  p_decoded->i_PDC[1] = ((p_descriptor->p_data[1] >> 3) & 0x0f);
+  p_decoded->i_PDC[2] = ((p_descriptor->p_data[1] << 2) & 0x1c) | 
+      (p_descriptor->p_data[2] >> 6);
+  p_decoded->i_PDC[3] = p_descriptor->p_data[2] & 0x3f;
+
+  p_descriptor->p_decoded = (void*)p_decoded;
+
+  return p_decoded;
+}
+
+
+/*****************************************************************************
+ * dvbpsi_GenPDCDr
+ *****************************************************************************/
+dvbpsi_descriptor_t * dvbpsi_GenPDCDr(dvbpsi_PDC_dr_t * p_decoded,
+                                          int b_duplicate)
+{
+  /* Create the descriptor */
+  dvbpsi_descriptor_t * p_descriptor =
+                dvbpsi_NewDescriptor(0x69, 3, NULL);
+
+  if(p_descriptor)
+  {
+    /* Encode data */
+    p_descriptor->p_data[0] = 0xf0 | (p_decoded->i_PDC[0] >> 1);
+    p_descriptor->p_data[1] = (p_decoded->i_PDC[0] << 7) | 
+        (p_decoded->i_PDC[1] << 3) | (p_decoded->i_PDC[2] >> 2);
+    p_descriptor->p_data[2] = (p_decoded->i_PDC[2] << 6 ) | 
+        p_decoded->i_PDC[3];
+
+    if(b_duplicate)
+    {
+      /* Duplicate decoded data */
+      dvbpsi_PDC_dr_t * p_dup_decoded =
+                (dvbpsi_PDC_dr_t*)malloc(sizeof(dvbpsi_PDC_dr_t));
+      if(p_dup_decoded)
+        memcpy(p_dup_decoded, p_decoded, sizeof(dvbpsi_PDC_dr_t));
+
+      p_descriptor->p_decoded = (void*)p_dup_decoded;
+    }
+  }
+
+  return p_descriptor;
+}
+

src/descriptors/dr_69.h

+/*****************************************************************************
+ * dr_69.h
+ * (c)2007 VideoLAN
+ * $Id$
+ *
+ * Authors: Pinkava Jiri <master_up@post.cz>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ *****************************************************************************/
+
+/*!
+ * \file <dr_69.h>
+ * \author Jiri Pinkava <master_up@post.cz>
+ * \brief Application interface for the PDC (Programme Delivery Control)
+ * descriptor decoder and generator.
+ *
+ * Application interface for the MPEG 2 TS PDC descriptor decoder and generator
+ * This descriptor's definition can be found in ETSC EN 300 231
+ */
+
+#ifndef _DVBPSI_DR_69_H_
+#define _DVBPSI_DR_69_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/*****************************************************************************
+ * dvbpsi_PDC_dr_t
+ *****************************************************************************/
+/*!
+ * \struct dvbpsi_PDC_dr_s
+ * \brief PDC descriptor structure.
+ *
+ * This structure is used to store a decoded PDC descriptor.
+ * (ETSI EN 300 231).
+ */
+/*!
+ * \typedef struct dvbpsi_PDC_dr_s dvbpsi_PDC_dr_t
+ * \brief dvbpsi_PDC_dr_t type definition.
+ */
+typedef struct dvbpsi_PDC_dr_s
+{
+  /* pdc[0] ~= day; PDC[1] ~= month; PDC[2] ~= hour; PDC[3] ~= min; */
+  uint8_t   i_PDC[4];          /*!< PDC */
+} dvbpsi_PDC_dr_t;
+
+
+/*****************************************************************************
+ * dvbpsi_DecodePDCDr
+ *****************************************************************************/
+/*!
+ * \fn dvbpsi_PDC_dr_t * dvbpsi_DecodePDCDr(
+                                        dvbpsi_descriptor_t * p_descriptor)
+ * \brief PDC descriptor decoder.
+ * \param p_descriptor pointer to the descriptor structure
+ * \return a pointer to a new "video stream" descriptor structure which
+ * contains the decoded data.
+ */
+dvbpsi_PDC_dr_t* dvbpsi_DecodePDCDr(dvbpsi_descriptor_t * p_descriptor);
+
+
+/*****************************************************************************
+ * dvbpsi_GenPDCDr
+ *****************************************************************************/
+/*!
+ * \fn dvbpsi_descriptor_t * dvbpsi_GenVStreamDr(
+                        dvbpsi_PDC_dr_t * p_decoded, int b_duplicate)
+ * \brief PDC descriptor generator.
+ * \param p_decoded pointer to a decoded PDC 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_GenPDCDr(dvbpsi_PDC_dr_t * p_decoded,
+                                          int b_duplicate);
+
+
+#ifdef __cplusplus
+};
+#endif
+
+#else
+#error "Multiple inclusions of dr_69.h"
+#endif
+