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mpegts: add atsc terrestrial virtual channel table

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=727460
This commit is contained in:
Stefan Ringel 2014-04-09 10:04:46 +02:00 committed by Sebastian Dröge
parent 7d97a4b20b
commit f566d17202
6 changed files with 273 additions and 11 deletions
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4
docs/libs/gst-plugins-bad-libs-sections.txt
View file

@ -363,6 +363,10 @@ gst_mpeg_ts_stream_type_get_type
<SECTION>
<FILE>gst-atsc-section</FILE>
GstMpegTsSectionATSCTableID
<SUBSECTION tvct>
GstMpegTsAtscTVCTSource
GstMpegTsAtscTVCT
gst_mpegts_section_get_atsc_tvct
<SUBSECTION Standard>
GST_TYPE_MPEG_TS_SECTION_ATSC_TABLE_ID
gst_mpeg_ts_section_atsc_table_id_get_type

3
gst-libs/gst/mpegts/Makefile.am
View file

@ -4,7 +4,8 @@ libgstmpegts_@GST_API_VERSION@_la_SOURCES = \
gstmpegtssection.c \
gstmpegtsdescriptor.c \
gst-dvb-descriptor.c \
gst-dvb-section.c
gst-dvb-section.c \
gst-atsc-section.c
libgstmpegts_@GST_API_VERSION@includedir = \
$(includedir)/gstreamer-@GST_API_VERSION@/gst/mpegts

213
gst-libs/gst/mpegts/gst-atsc-section.c Normal file
View file

@ -0,0 +1,213 @@
/*
* Copyright (C) 2014 Stefan Ringel
*
* Authors:
* Stefan Ringel <linuxtv@stefanringel.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <string.h>
#include <stdlib.h>
#include "mpegts.h"
#include "gstmpegts-private.h"
/**
* SECTION:gst-atsc-section
* @title: ATSC variants of MPEG-TS sections
* @short_description: Sections for the various ATSC specifications
* @include: gst/mpegts/mpegts.h
*
*/
/* Terrestrial Virtual Channel Table TVCT */
static GstMpegTsAtscTVCTSource *
_gst_mpegts_atsc_tvct_source_copy (GstMpegTsAtscTVCTSource * source)
{
GstMpegTsAtscTVCTSource *copy;
copy = g_slice_dup (GstMpegTsAtscTVCTSource, source);
copy->descriptors = g_ptr_array_ref (source->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_tvct_source_free (GstMpegTsAtscTVCTSource * source)
{
g_ptr_array_unref (source->descriptors);
g_slice_free (GstMpegTsAtscTVCTSource, source);
}
G_DEFINE_BOXED_TYPE (GstMpegTsAtscTVCTSource, gst_mpegts_atsc_tvct_source,
(GBoxedCopyFunc) _gst_mpegts_atsc_tvct_source_copy,
(GFreeFunc) _gst_mpegts_atsc_tvct_source_free);
static GstMpegTsAtscTVCT *
_gst_mpegts_atsc_tvct_copy (GstMpegTsAtscTVCT * tvct)
{
GstMpegTsAtscTVCT *copy;
copy = g_slice_dup (GstMpegTsAtscTVCT, tvct);
copy->sources = g_ptr_array_ref (tvct->sources);
copy->descriptors = g_ptr_array_ref (tvct->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_tvct_free (GstMpegTsAtscTVCT * tvct)
{
g_ptr_array_unref (tvct->sources);
g_ptr_array_unref (tvct->descriptors);
g_slice_free (GstMpegTsAtscTVCT, tvct);
}
G_DEFINE_BOXED_TYPE (GstMpegTsAtscTVCT, gst_mpegts_atsc_tvct,
(GBoxedCopyFunc) _gst_mpegts_atsc_tvct_copy,
(GFreeFunc) _gst_mpegts_atsc_tvct_free);
static gpointer
_parse_atsc_tvct (GstMpegTsSection * section)
{
GstMpegTsAtscTVCT *tvct = NULL;
guint8 *data, *end, source_nb;
guint32 tmp32;
guint16 descriptors_loop_length, tmp16;
tvct = g_slice_new0 (GstMpegTsAtscTVCT);
data = section->data;
end = data + section->section_length;
tvct->transport_stream_id = section->subtable_extension;
/* Skip already parsed data */
data += 8;
/* minimum size */
if (data - end < 2 + 2 + 4)
goto error;
tvct->protocol_version = *data;
data += 1;
source_nb = *data;
data += 1;
tvct->sources = g_ptr_array_new_full (source_nb,
(GDestroyNotify) _gst_mpegts_atsc_tvct_source_free);
for (guint i = 0; i < source_nb; i++) {
GstMpegTsAtscTVCTSource *source;
/* minimum 32 bytes for a entry, 2 bytes second descriptor
loop-length, 4 bytes crc */
if (end - data < 32 + 2 + 4)
goto error;
source = g_slice_new0 (GstMpegTsAtscTVCTSource);
g_ptr_array_add (tvct->sources, source);
/* FIXME: 7 utf16 charater
GST_READ_UINT16_BE x 7 or extern method ? */
source->short_name = g_memdup (data, 14);
data += 14;
tmp32 = GST_READ_UINT32_BE (data);
source->major_channel_number = (tmp32 >> 18) & 0x03FF;
source->minor_channel_number = (tmp32 >> 8) & 0x03FF;
source->modulation_mode = tmp32 & 0xF;
data += 4;
source->carrier_frequency = GST_READ_UINT32_BE (data);
data += 4;
source->channel_TSID = GST_READ_UINT16_BE (data);
data += 2;
source->program_number = GST_READ_UINT16_BE (data);
data += 2;
tmp16 = GST_READ_UINT16_BE (data);
source->ETM_location = (tmp16 >> 14) & 0x3;
source->access_controlled = (tmp16 >> 13) & 0x1;
source->hidden = (tmp16 >> 12) & 0x1;
source->hide_guide = (tmp16 >> 10) & 0x1;
source->service_type = tmp16 & 0x3f;
data += 2;
source->source_id = GST_READ_UINT16_BE (data);
data += 2;
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x03FF;
data += 2;
if (end - data < descriptors_loop_length + 6)
goto error;
source->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
if (source->descriptors == NULL)
goto error;
data += descriptors_loop_length;
}
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x03FF;
data += 2;
if (end - data < descriptors_loop_length + 4)
goto error;
tvct->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
if (tvct->descriptors == NULL)
goto error;
data += descriptors_loop_length;
return (gpointer) tvct;
error:
if (tvct)
_gst_mpegts_atsc_tvct_free (tvct);
return NULL;
}
/**
* gst_mpegts_section_get_atsc_tvct:
* @section: a #GstMpegTsSection of type %GST_MPEGTS_SECTION_ATSC_TVCT
*
* Returns the #GstMpegTsAtscTVCT contained in the @section
*
* Returns: The #GstMpegTsAtscTVCT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegTsAtscTVCT *
gst_mpegts_section_get_atsc_tvct (GstMpegTsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_TVCT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed =
__common_section_checks (section, 16, _parse_atsc_tvct,
(GDestroyNotify) _gst_mpegts_atsc_tvct_free);
return (const GstMpegTsAtscTVCT *) section->cached_parsed;
}

51
gst-libs/gst/mpegts/gst-atsc-section.h
View file

@ -66,6 +66,57 @@ typedef enum {
GST_MTS_TABLE_ID_ATSC_SATELLITE_VIRTUAL_CHANNEL = 0xDA,
} GstMpegTsSectionATSCTableID;
/* TVCT */
#define GST_TYPE_MPEGTS_ATSC_TVCT (gst_mpegts_atsc_tvct_get_type ())
#define GST_TYPE_MPEGTS_ATSC_TVCT_SOURCE (gst_mpegts_atsc_tvct_source_get_type ())
typedef struct _GstMpegTsAtscTVCTSource GstMpegTsAtscTVCTSource;
typedef struct _GstMpegTsAtscTVCT GstMpegTsAtscTVCT;
/**
* GstMpegTsAtscTVCTSource:
*
* Source from a @GstMpegTsAtscTVCT
*/
struct _GstMpegTsAtscTVCTSource
{
gunichar2 *short_name;
guint16 major_channel_number;
guint16 minor_channel_number;
guint8 modulation_mode;
guint32 carrier_frequency;
guint16 channel_TSID;
guint16 program_number;
/* FIXME: */
guint8 ETM_location;
gboolean access_controlled;
gboolean hidden;
gboolean hide_guide;
/* FIXME: */
guint8 service_type;
guint16 source_id;
GPtrArray *descriptors;
};
/**
* GstMpegTsAtscTVCT:
*
* Terrestrial Virtual Channel Table (A65)
*
*/
struct _GstMpegTsAtscTVCT
{
guint16 transport_stream_id;
guint8 protocol_version;
GPtrArray *sources;
GPtrArray *descriptors;
};
GType gst_mpegts_atsc_tvct_get_type (void);
GType gst_mpegts_atsc_tvct_source_get_type (void);
const GstMpegTsAtscTVCT * gst_mpegts_section_get_atsc_tvct (GstMpegTsSection * section);
G_END_DECLS
#endif /* GST_MPEGTS_SECTION_H */

9
gst-libs/gst/mpegts/gstmpegtssection.c
View file

@ -52,15 +52,6 @@
* and other specifications mentionned in the documentation.
*/
/* FIXME : Move this to proper file once we have a C file for it */
/**
* SECTION:gst-atsc-section
* @title: ATSC variants of MPEG-TS sections
* @short_description: Sections for the various ATSC specifications
* @include: gst/mpegts/mpegts.h
*
*/
/*
* TODO
*

4
gst-libs/gst/mpegts/gstmpegtssection.h
View file

@ -51,6 +51,7 @@ GType gst_mpegts_section_get_type (void);
* @GST_MPEGTS_SECTION_SDT: Service Description Table (EN 300 468)
* @GST_MPEGTS_SECTION_TDT: Time and Date Table (EN 300 468)
* @GST_MPEGTS_SECTION_TOT: Time Offset Table (EN 300 468)
* @GST_MPEGTS_SECTION_ATSC_TVCT: ATSC Terrestrial Virtual Channel Table (A65)
*
* Types of #GstMpegTsSection that the library handles.
*/
@ -65,7 +66,8 @@ typedef enum {
GST_MPEGTS_SECTION_BAT,
GST_MPEGTS_SECTION_SDT,
GST_MPEGTS_SECTION_TDT,
GST_MPEGTS_SECTION_TOT
GST_MPEGTS_SECTION_TOT,
GST_MPEGTS_SECTION_ATSC_TVCT
} GstMpegTsSectionType;
/**