gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/mpegts/gst-atsc-section.c

1762 lines
45 KiB
C

/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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
*
* The list of section types defined and used by the ATSC specifications can be
* seen in %GstMpegtsSectionATSCTableID.
*
* # Supported ATSC MPEG-TS sections
* These are the sections for which parsing and packetizing code exists.
*
* ## Master Guide Table (MGT)
* See:
* * gst_mpegts_section_get_atsc_mgt()
* * %GstMpegtsAtscMGT
* * %GstMpegtsAtscMGTTable
* * gst_mpegts_atsc_mgt_new()
*
* ## Terrestrial (TVCT) and Cable (CVCT) Virtual Channel Table
* See:
* * gst_mpegts_section_get_atsc_tvct()
* * gst_mpegts_section_get_atsc_cvct()
* * %GstMpegtsAtscVCT
* * %GstMpegtsAtscVCTSource
*
* ## Rating Region Table (RRT)
* See:
* * gst_mpegts_section_get_atsc_rrt()
* * %GstMpegtsAtscRRT
* * gst_mpegts_atsc_rrt_new()
*
* ## Event Information Table (EIT)
* See:
* * gst_mpegts_section_get_atsc_eit()
* * %GstMpegtsAtscEIT
* * %GstMpegtsAtscEITEvent
*
* ## Extended Text Table (ETT)
* See:
* * gst_mpegts_section_get_atsc_ett()
* * %GstMpegtsAtscETT
*
* ## System Time Table (STT)
* See:
* * gst_mpegts_section_get_atsc_stt()
* * %GstMpegtsAtscSTT
* * gst_mpegts_atsc_stt_new()
*
* # API
*/
/* Terrestrial/Cable Virtual Channel Table TVCT/CVCT */
static GstMpegtsAtscVCTSource *
_gst_mpegts_atsc_vct_source_copy (GstMpegtsAtscVCTSource * source)
{
GstMpegtsAtscVCTSource *copy;
copy = g_slice_dup (GstMpegtsAtscVCTSource, source);
copy->descriptors = g_ptr_array_ref (source->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_vct_source_free (GstMpegtsAtscVCTSource * source)
{
g_free (source->short_name);
if (source->descriptors)
g_ptr_array_unref (source->descriptors);
g_slice_free (GstMpegtsAtscVCTSource, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscVCTSource, gst_mpegts_atsc_vct_source,
(GBoxedCopyFunc) _gst_mpegts_atsc_vct_source_copy,
(GFreeFunc) _gst_mpegts_atsc_vct_source_free);
static GstMpegtsAtscVCT *
_gst_mpegts_atsc_vct_copy (GstMpegtsAtscVCT * vct)
{
GstMpegtsAtscVCT *copy;
copy = g_slice_dup (GstMpegtsAtscVCT, vct);
copy->sources = g_ptr_array_ref (vct->sources);
copy->descriptors = g_ptr_array_ref (vct->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_vct_free (GstMpegtsAtscVCT * vct)
{
if (vct->sources)
g_ptr_array_unref (vct->sources);
if (vct->descriptors)
g_ptr_array_unref (vct->descriptors);
g_slice_free (GstMpegtsAtscVCT, vct);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscVCT, gst_mpegts_atsc_vct,
(GBoxedCopyFunc) _gst_mpegts_atsc_vct_copy,
(GFreeFunc) _gst_mpegts_atsc_vct_free);
static gpointer
_parse_atsc_vct (GstMpegtsSection * section)
{
GstMpegtsAtscVCT *vct = NULL;
guint8 *data, *end, source_nb;
guint32 tmp32;
guint16 descriptors_loop_length, tmp16;
guint i;
GError *err = NULL;
vct = g_slice_new0 (GstMpegtsAtscVCT);
data = section->data;
end = data + section->section_length;
vct->transport_stream_id = section->subtable_extension;
/* Skip already parsed data */
data += 8;
/* minimum size */
if (end - data < 2 + 2 + 4)
goto error;
vct->protocol_version = *data;
data += 1;
source_nb = *data;
data += 1;
vct->sources = g_ptr_array_new_full (source_nb,
(GDestroyNotify) _gst_mpegts_atsc_vct_source_free);
for (i = 0; i < source_nb; i++) {
GstMpegtsAtscVCTSource *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 (GstMpegtsAtscVCTSource);
g_ptr_array_add (vct->sources, source);
source->short_name =
g_convert ((gchar *) data, 14, "utf-8", "utf-16be", NULL, NULL, &err);
if (err) {
GST_WARNING ("Failed to convert VCT Source short_name to utf-8: %d %s",
err->code, err->message);
GST_MEMDUMP ("UTF-16 string", data, 14);
g_error_free (err);
}
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;
/* only used in CVCT */
source->path_select = (tmp16 >> 11) & 0x1;
source->out_of_band = (tmp16 >> 10) & 0x1;
source->hide_guide = (tmp16 >> 9) & 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;
vct->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
if (vct->descriptors == NULL)
goto error;
return (gpointer) vct;
error:
_gst_mpegts_atsc_vct_free (vct);
return NULL;
}
/**
* gst_mpegts_section_get_atsc_tvct:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_TVCT
*
* Returns the #GstMpegtsAtscVCT contained in the @section
*
* Returns: The #GstMpegtsAtscVCT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscVCT *
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_vct,
(GDestroyNotify) _gst_mpegts_atsc_vct_free);
return (const GstMpegtsAtscVCT *) section->cached_parsed;
}
/**
* gst_mpegts_section_get_atsc_cvct:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_CVCT
*
* Returns the #GstMpegtsAtscVCT contained in the @section
*
* Returns: The #GstMpegtsAtscVCT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscVCT *
gst_mpegts_section_get_atsc_cvct (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_CVCT,
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_vct,
(GDestroyNotify) _gst_mpegts_atsc_vct_free);
return (const GstMpegtsAtscVCT *) section->cached_parsed;
}
/* MGT */
static GstMpegtsAtscMGTTable *
_gst_mpegts_atsc_mgt_table_copy (GstMpegtsAtscMGTTable * mgt_table)
{
GstMpegtsAtscMGTTable *copy;
copy = g_slice_dup (GstMpegtsAtscMGTTable, mgt_table);
copy->descriptors = g_ptr_array_ref (mgt_table->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_mgt_table_free (GstMpegtsAtscMGTTable * mgt_table)
{
g_ptr_array_unref (mgt_table->descriptors);
g_slice_free (GstMpegtsAtscMGTTable, mgt_table);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscMGTTable, gst_mpegts_atsc_mgt_table,
(GBoxedCopyFunc) _gst_mpegts_atsc_mgt_table_copy,
(GFreeFunc) _gst_mpegts_atsc_mgt_table_free);
static GstMpegtsAtscMGT *
_gst_mpegts_atsc_mgt_copy (GstMpegtsAtscMGT * mgt)
{
GstMpegtsAtscMGT *copy;
copy = g_slice_dup (GstMpegtsAtscMGT, mgt);
copy->tables = g_ptr_array_ref (mgt->tables);
copy->descriptors = g_ptr_array_ref (mgt->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_mgt_free (GstMpegtsAtscMGT * mgt)
{
g_ptr_array_unref (mgt->tables);
g_ptr_array_unref (mgt->descriptors);
g_slice_free (GstMpegtsAtscMGT, mgt);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscMGT, gst_mpegts_atsc_mgt,
(GBoxedCopyFunc) _gst_mpegts_atsc_mgt_copy,
(GFreeFunc) _gst_mpegts_atsc_mgt_free);
static gpointer
_parse_atsc_mgt (GstMpegtsSection * section)
{
GstMpegtsAtscMGT *mgt = NULL;
guint i = 0;
guint8 *data, *end;
guint16 descriptors_loop_length;
mgt = g_slice_new0 (GstMpegtsAtscMGT);
data = section->data;
end = data + section->section_length;
/* Skip already parsed data */
data += 8;
mgt->protocol_version = GST_READ_UINT8 (data);
data += 1;
mgt->tables_defined = GST_READ_UINT16_BE (data);
data += 2;
mgt->tables = g_ptr_array_new_full (mgt->tables_defined,
(GDestroyNotify) _gst_mpegts_atsc_mgt_table_free);
for (i = 0; i < mgt->tables_defined && data + 11 < end; i++) {
GstMpegtsAtscMGTTable *mgt_table;
if (data + 11 >= end) {
GST_WARNING ("MGT data too short to parse inner table num %d", i);
goto error;
}
mgt_table = g_slice_new0 (GstMpegtsAtscMGTTable);
g_ptr_array_add (mgt->tables, mgt_table);
mgt_table->table_type = GST_READ_UINT16_BE (data);
data += 2;
mgt_table->pid = GST_READ_UINT16_BE (data) & 0x1FFF;
data += 2;
mgt_table->version_number = GST_READ_UINT8 (data) & 0x1F;
data += 1;
mgt_table->number_bytes = GST_READ_UINT32_BE (data);
data += 4;
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x0FFF;
data += 2;
if (data + descriptors_loop_length >= end) {
GST_WARNING ("MGT data too short to parse inner table descriptors (table "
"num %d", i);
goto error;
}
mgt_table->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
data += descriptors_loop_length;
}
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0xFFF;
data += 2;
if (data + descriptors_loop_length >= end) {
GST_WARNING ("MGT data too short to parse descriptors");
goto error;
}
mgt->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
return (gpointer) mgt;
error:
_gst_mpegts_atsc_mgt_free (mgt);
return NULL;
}
static gboolean
_packetize_mgt (GstMpegtsSection * section)
{
const GstMpegtsAtscMGT *mgt;
guint8 *pos, *data;
gsize length;
guint i, j;
mgt = gst_mpegts_section_get_atsc_mgt (section);
if (mgt == NULL)
return FALSE;
if (mgt->tables_defined != mgt->tables->len)
return FALSE;
/* 8 byte common section fields
* 1 byte protocol version
* 2 byte tables_defined
* 2 byte reserved / descriptors_length
* 4 byte CRC
*/
length = 17;
for (i = 0; i < mgt->tables->len; i++) {
GstMpegtsAtscMGTTable *mgt_table = g_ptr_array_index (mgt->tables, 1);
/* 2 byte table_type
* 2 byte reserved / table_type_PID
* 1 byte reserved / table_type_version_number
* 4 byte number bytes
* 2 byte reserved / table_type_descriptors_length
*/
length += 11;
if (mgt_table->descriptors) {
for (j = 0; j < mgt_table->descriptors->len; j++) {
GstMpegtsDescriptor *descriptor =
g_ptr_array_index (mgt_table->descriptors, j);
length += descriptor->length + 2;
}
}
}
if (mgt->descriptors) {
for (i = 0; i < mgt->descriptors->len; i++) {
GstMpegtsDescriptor *descriptor = g_ptr_array_index (mgt->descriptors, i);
length += descriptor->length + 2;
}
}
_packetize_common_section (section, length);
data = section->data + 8;
/* protocol_version - 8 bit */
GST_WRITE_UINT8 (data, mgt->protocol_version);
data += 1;
/* tables_defined - 16 bit uimsbf */
GST_WRITE_UINT16_BE (data, mgt->tables_defined);
data += 2;
for (i = 0; i < mgt->tables_defined; i++) {
GstMpegtsAtscMGTTable *mgt_table = g_ptr_array_index (mgt->tables, 1);
/* table_type - 16 bit uimsbf */
GST_WRITE_UINT16_BE (data, mgt_table->table_type);
data += 2;
/* 3 bit reserved, 13 bit table_type_PID uimsbf */
GST_WRITE_UINT16_BE (data, mgt_table->pid | 0xe000);
data += 2;
/* 3 bit reserved, 5 bit table_type_version_number uimsbf */
GST_WRITE_UINT8 (data, mgt_table->version_number | 0xe0);
data += 1;
/* 4 bit reserved, 12 bit table_type_descriptor_length uimsbf */
pos = data;
*data++ = 0xF0;
*data++ = 0x00;
_packetize_descriptor_array (mgt_table->descriptors, &data);
/* Go back and update the descriptor length */
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xF000);
}
/* 4 bit reserved, 12 bit descriptor_length uimsbf */
pos = data;
*data++ = 0xF0;
*data++ = 0x00;
_packetize_descriptor_array (mgt->descriptors, &data);
/* Go back and update the descriptor length */
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xF000);
return TRUE;
}
/**
* gst_mpegts_section_from_atsc_mgt:
* @mgt: (transfer full): a #GstMpegtsAtscMGT to create the #GstMpegtsSection from
*
* Returns: (transfer full): the #GstMpegtsSection
* Since: 1.18
*/
GstMpegtsSection *
gst_mpegts_section_from_atsc_mgt (GstMpegtsAtscMGT * mgt)
{
GstMpegtsSection *section;
g_return_val_if_fail (mgt != NULL, NULL);
section = _gst_mpegts_section_init (0x1ffb,
GST_MTS_TABLE_ID_ATSC_MASTER_GUIDE);
section->subtable_extension = 0x0000;
section->cached_parsed = (gpointer) mgt;
section->packetizer = _packetize_mgt;
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_mgt_free;
return section;
}
/**
* gst_mpegts_section_get_atsc_mgt:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_MGT
*
* Returns the #GstMpegtsAtscMGT contained in the @section.
*
* Returns: The #GstMpegtsAtscMGT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscMGT *
gst_mpegts_section_get_atsc_mgt (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_MGT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed =
__common_section_checks (section, 17, _parse_atsc_mgt,
(GDestroyNotify) _gst_mpegts_atsc_mgt_free);
return (const GstMpegtsAtscMGT *) section->cached_parsed;
}
/**
* gst_mpegts_section_atsc_mgt_new:
*
* Returns: (transfer full): #GstMpegtsAtscMGT
* Since: 1.18
*/
GstMpegtsAtscMGT *
gst_mpegts_atsc_mgt_new (void)
{
GstMpegtsAtscMGT *mgt;
mgt = g_slice_new0 (GstMpegtsAtscMGT);
mgt->tables = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_mgt_table_free);
mgt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
gst_mpegts_descriptor_free);
return mgt;
}
/* Multi string structure */
static GstMpegtsAtscStringSegment *
_gst_mpegts_atsc_string_segment_copy (GstMpegtsAtscStringSegment * seg)
{
GstMpegtsAtscStringSegment *copy;
copy = g_slice_dup (GstMpegtsAtscStringSegment, seg);
return copy;
}
static void
_gst_mpegts_atsc_string_segment_free (GstMpegtsAtscStringSegment * seg)
{
g_free (seg->cached_string);
g_slice_free (GstMpegtsAtscStringSegment, seg);
}
static void
_gst_mpegts_atsc_string_segment_decode_string (GstMpegtsAtscStringSegment * seg)
{
const gchar *from_encoding;
g_return_if_fail (seg->cached_string == NULL);
if (seg->compression_type != 0) {
GST_FIXME ("Compressed strings not yet supported");
return;
}
/* FIXME add more encodings */
switch (seg->mode) {
case 0x3F:
from_encoding = "UTF-16BE";
break;
default:
from_encoding = NULL;
break;
}
if (from_encoding != NULL && seg->compressed_data_size > 0) {
GError *err = NULL;
seg->cached_string =
g_convert ((gchar *) seg->compressed_data,
(gssize) seg->compressed_data_size, "UTF-8", from_encoding, NULL, NULL,
&err);
if (err) {
GST_WARNING ("Failed to convert input string from codeset %s",
from_encoding);
g_error_free (err);
}
} else {
seg->cached_string =
g_strndup ((gchar *) seg->compressed_data, seg->compressed_data_size);
}
}
const gchar *
gst_mpegts_atsc_string_segment_get_string (GstMpegtsAtscStringSegment * seg)
{
if (!seg->cached_string)
_gst_mpegts_atsc_string_segment_decode_string (seg);
return seg->cached_string;
}
gboolean
gst_mpegts_atsc_string_segment_set_string (GstMpegtsAtscStringSegment * seg,
gchar * string, guint8 compression_type, guint8 mode)
{
const gchar *to_encoding = NULL;
gboolean ret = FALSE;
gsize written;
GError *err = NULL;
unsigned long len;
if (compression_type) {
GST_FIXME ("Compressed strings not yet supported");
goto done;
}
switch (mode) {
case 0x3f:
to_encoding = "UTF-16BE";
break;
default:
break;
}
if (seg->cached_string)
g_free (seg->cached_string);
if (seg->compressed_data)
g_free (seg->compressed_data);
seg->cached_string = g_strdup (string);
seg->compression_type = compression_type;
seg->mode = mode;
len = strlen (string);
if (to_encoding && len) {
gchar *converted = g_convert (string, len, to_encoding, "UTF-8",
NULL, &written, &err);
if (err) {
GST_WARNING ("Failed to convert input string to codeset %s (%s)",
to_encoding, err->message);
g_error_free (err);
goto done;
}
seg->compressed_data = (guint8 *) g_strndup (converted, written);
seg->compressed_data_size = written;
g_free (converted);
} else {
seg->compressed_data = (guint8 *) g_strndup (string, len);
seg->compressed_data_size = len;
}
ret = TRUE;
done:
return ret;
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscStringSegment, gst_mpegts_atsc_string_segment,
(GBoxedCopyFunc) _gst_mpegts_atsc_string_segment_copy,
(GFreeFunc) _gst_mpegts_atsc_string_segment_free);
static GstMpegtsAtscMultString *
_gst_mpegts_atsc_mult_string_copy (GstMpegtsAtscMultString * mstring)
{
GstMpegtsAtscMultString *copy;
copy = g_slice_dup (GstMpegtsAtscMultString, mstring);
copy->segments = g_ptr_array_ref (mstring->segments);
return copy;
}
static void
_gst_mpegts_atsc_mult_string_free (GstMpegtsAtscMultString * mstring)
{
g_ptr_array_unref (mstring->segments);
g_slice_free (GstMpegtsAtscMultString, mstring);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscMultString, gst_mpegts_atsc_mult_string,
(GBoxedCopyFunc) _gst_mpegts_atsc_mult_string_copy,
(GFreeFunc) _gst_mpegts_atsc_mult_string_free);
static GPtrArray *
_parse_atsc_mult_string (guint8 * data, guint datasize)
{
guint8 num_strings;
GPtrArray *res = NULL;
guint8 *end = data + datasize;
gint i;
if (datasize > 0) {
/* 1 is the minimum entry size, so no need to check here */
num_strings = GST_READ_UINT8 (data);
data += 1;
res =
g_ptr_array_new_full (num_strings,
(GDestroyNotify) _gst_mpegts_atsc_mult_string_free);
for (i = 0; i < num_strings; i++) {
GstMpegtsAtscMultString *mstring;
guint8 num_segments;
gint j;
mstring = g_slice_new0 (GstMpegtsAtscMultString);
g_ptr_array_add (res, mstring);
mstring->segments =
g_ptr_array_new_full (num_strings,
(GDestroyNotify) _gst_mpegts_atsc_string_segment_free);
/* each entry needs at least 4 bytes (lang code and segments number) */
if (end - data < 4) {
GST_WARNING ("Data too short for multstring parsing %d",
(gint) (end - data));
goto error;
}
mstring->iso_639_langcode[0] = GST_READ_UINT8 (data);
data += 1;
mstring->iso_639_langcode[1] = GST_READ_UINT8 (data);
data += 1;
mstring->iso_639_langcode[2] = GST_READ_UINT8 (data);
data += 1;
num_segments = GST_READ_UINT8 (data);
data += 1;
for (j = 0; j < num_segments; j++) {
GstMpegtsAtscStringSegment *seg;
seg = g_slice_new0 (GstMpegtsAtscStringSegment);
g_ptr_array_add (mstring->segments, seg);
/* each entry needs at least 3 bytes */
if (end - data < 3) {
GST_WARNING ("Data too short for multstring parsing %d", datasize);
goto error;
}
seg->compression_type = GST_READ_UINT8 (data);
data += 1;
seg->mode = GST_READ_UINT8 (data);
data += 1;
seg->compressed_data_size = GST_READ_UINT8 (data);
data += 1;
if (end - data < seg->compressed_data_size) {
GST_WARNING ("Data too short for multstring parsing %d", datasize);
goto error;
}
if (seg->compressed_data_size)
seg->compressed_data = data;
data += seg->compressed_data_size;
}
}
}
return res;
error:
if (res)
g_ptr_array_unref (res);
return NULL;
}
static void
_packetize_atsc_mult_string (GPtrArray * strings, guint8 ** data)
{
guint i;
if (strings == NULL)
return;
/* 8 bit number_strings */
GST_WRITE_UINT8 (*data, strings->len);
*data += 1;
for (i = 0; i < strings->len; i++) {
GstMpegtsAtscMultString *string;
guint j;
string = g_ptr_array_index (strings, i);
/* 24 bit ISO_639_langcode */
GST_WRITE_UINT8 (*data, string->iso_639_langcode[0]);
*data += 1;
GST_WRITE_UINT8 (*data, string->iso_639_langcode[1]);
*data += 1;
GST_WRITE_UINT8 (*data, string->iso_639_langcode[2]);
*data += 1;
/* 8 bit number_segments */
GST_WRITE_UINT8 (*data, string->segments->len);
*data += 1;
for (j = 0; j < string->segments->len; j++) {
GstMpegtsAtscStringSegment *seg;
seg = g_ptr_array_index (string->segments, j);
/* 8 bit compression_type */
GST_WRITE_UINT8 (*data, seg->compression_type);
*data += 1;
/* 8 bit mode */
GST_WRITE_UINT8 (*data, seg->mode);
*data += 1;
/* 8 bit number_bytes */
GST_WRITE_UINT8 (*data, seg->compressed_data_size);
*data += 1;
/* number_bytes compressed string */
memcpy (*data, seg->compressed_data, seg->compressed_data_size);
*data += seg->compressed_data_size;
}
}
}
static gsize
_get_atsc_mult_string_packetized_length (GPtrArray * strings)
{
gsize length = 1;
guint i;
for (i = 0; i < strings->len; i++) {
GstMpegtsAtscMultString *string;
guint j;
string = g_ptr_array_index (strings, i);
length += 4;
for (j = 0; j < string->segments->len; j++) {
GstMpegtsAtscStringSegment *seg;
seg = g_ptr_array_index (string->segments, j);
length += 3 + seg->compressed_data_size;
}
}
return length;
}
/* EIT */
static GstMpegtsAtscEITEvent *
_gst_mpegts_atsc_eit_event_copy (GstMpegtsAtscEITEvent * event)
{
GstMpegtsAtscEITEvent *copy;
copy = g_slice_dup (GstMpegtsAtscEITEvent, event);
copy->titles = g_ptr_array_ref (event->titles);
copy->descriptors = g_ptr_array_ref (event->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_eit_event_free (GstMpegtsAtscEITEvent * event)
{
if (event->titles)
g_ptr_array_unref (event->titles);
if (event->descriptors)
g_ptr_array_unref (event->descriptors);
g_slice_free (GstMpegtsAtscEITEvent, event);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscEITEvent, gst_mpegts_atsc_eit_event,
(GBoxedCopyFunc) _gst_mpegts_atsc_eit_event_copy,
(GFreeFunc) _gst_mpegts_atsc_eit_event_free);
static GstMpegtsAtscEIT *
_gst_mpegts_atsc_eit_copy (GstMpegtsAtscEIT * eit)
{
GstMpegtsAtscEIT *copy;
copy = g_slice_dup (GstMpegtsAtscEIT, eit);
copy->events = g_ptr_array_ref (eit->events);
return copy;
}
static void
_gst_mpegts_atsc_eit_free (GstMpegtsAtscEIT * eit)
{
if (eit->events)
g_ptr_array_unref (eit->events);
g_slice_free (GstMpegtsAtscEIT, eit);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscEIT, gst_mpegts_atsc_eit,
(GBoxedCopyFunc) _gst_mpegts_atsc_eit_copy,
(GFreeFunc) _gst_mpegts_atsc_eit_free);
static gpointer
_parse_atsc_eit (GstMpegtsSection * section)
{
GstMpegtsAtscEIT *eit = NULL;
guint i = 0;
guint8 *data, *end;
guint8 num_events;
eit = g_slice_new0 (GstMpegtsAtscEIT);
data = section->data;
end = data + section->section_length;
eit->source_id = section->subtable_extension;
/* Skip already parsed data */
data += 8;
eit->protocol_version = GST_READ_UINT8 (data);
data += 1;
num_events = GST_READ_UINT8 (data);
data += 1;
eit->events = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_eit_event_free);
for (i = 0; i < num_events; i++) {
GstMpegtsAtscEITEvent *event;
guint32 tmp;
guint8 text_length;
guint16 descriptors_loop_length;
if (end - data < 12) {
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
section->pid, (gint) (end - 4 - data), num_events);
goto error;
}
event = g_slice_new0 (GstMpegtsAtscEITEvent);
g_ptr_array_add (eit->events, event);
event->event_id = GST_READ_UINT16_BE (data) & 0x3FFF;
data += 2;
event->start_time = GST_READ_UINT32_BE (data);
data += 4;
tmp = GST_READ_UINT32_BE (data);
data += 4;
event->etm_location = (tmp >> 28) & 0x3;
event->length_in_seconds = (tmp >> 8) & 0x0FFFFF;
text_length = tmp & 0xFF;
if (text_length > end - data - 4 - 2) {
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
section->pid, (gint) (end - 4 - data), num_events);
goto error;
}
event->titles = _parse_atsc_mult_string (data, text_length);
data += text_length;
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x0FFF;
data += 2;
if (end - data - 4 < descriptors_loop_length) {
GST_WARNING ("PID %d invalid EIT entry length %d with %u events",
section->pid, (gint) (end - 4 - data), num_events);
goto error;
}
event->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
data += descriptors_loop_length;
}
if (data != end - 4) {
GST_WARNING ("PID %d invalid EIT parsed %d length %d",
section->pid, (gint) (data - section->data), section->section_length);
goto error;
}
return (gpointer) eit;
error:
_gst_mpegts_atsc_eit_free (eit);
return NULL;
}
/**
* gst_mpegts_section_get_atsc_eit:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_EIT
*
* Returns the #GstMpegtsAtscEIT contained in the @section.
*
* Returns: The #GstMpegtsAtscEIT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscEIT *
gst_mpegts_section_get_atsc_eit (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_EIT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed =
__common_section_checks (section, 14, _parse_atsc_eit,
(GDestroyNotify) _gst_mpegts_atsc_eit_free);
return (const GstMpegtsAtscEIT *) section->cached_parsed;
}
static GstMpegtsAtscETT *
_gst_mpegts_atsc_ett_copy (GstMpegtsAtscETT * ett)
{
GstMpegtsAtscETT *copy;
copy = g_slice_dup (GstMpegtsAtscETT, ett);
copy->messages = g_ptr_array_ref (ett->messages);
return copy;
}
static void
_gst_mpegts_atsc_ett_free (GstMpegtsAtscETT * ett)
{
if (ett->messages)
g_ptr_array_unref (ett->messages);
g_slice_free (GstMpegtsAtscETT, ett);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscETT, gst_mpegts_atsc_ett,
(GBoxedCopyFunc) _gst_mpegts_atsc_ett_copy,
(GFreeFunc) _gst_mpegts_atsc_ett_free);
static gpointer
_parse_ett (GstMpegtsSection * section)
{
GstMpegtsAtscETT *ett = NULL;
guint8 *data, *end;
ett = g_slice_new0 (GstMpegtsAtscETT);
data = section->data;
end = data + section->section_length;
ett->ett_table_id_extension = section->subtable_extension;
/* Skip already parsed data */
data += 8;
ett->protocol_version = GST_READ_UINT8 (data);
data += 1;
ett->etm_id = GST_READ_UINT32_BE (data);
data += 4;
ett->messages = _parse_atsc_mult_string (data, end - data - 4);
data += end - data - 4;
if (data != end - 4) {
GST_WARNING ("PID %d invalid ETT parsed %d length %d",
section->pid, (gint) (data - section->data), section->section_length);
goto error;
}
return (gpointer) ett;
error:
_gst_mpegts_atsc_ett_free (ett);
return NULL;
}
/**
* gst_mpegts_section_get_atsc_ett:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_ETT
*
* Returns the #GstMpegtsAtscETT contained in the @section.
*
* Returns: The #GstMpegtsAtscETT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscETT *
gst_mpegts_section_get_atsc_ett (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_ETT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed = __common_section_checks (section, 17, _parse_ett,
(GDestroyNotify) _gst_mpegts_atsc_ett_free);
return (const GstMpegtsAtscETT *) section->cached_parsed;
}
/* STT */
static GstMpegtsAtscSTT *
_gst_mpegts_atsc_stt_copy (GstMpegtsAtscSTT * stt)
{
GstMpegtsAtscSTT *copy;
copy = g_slice_dup (GstMpegtsAtscSTT, stt);
copy->descriptors = g_ptr_array_ref (stt->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_stt_free (GstMpegtsAtscSTT * stt)
{
if (stt->descriptors)
g_ptr_array_unref (stt->descriptors);
if (stt->utc_datetime)
gst_date_time_unref (stt->utc_datetime);
g_slice_free (GstMpegtsAtscSTT, stt);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscSTT, gst_mpegts_atsc_stt,
(GBoxedCopyFunc) _gst_mpegts_atsc_stt_copy,
(GFreeFunc) _gst_mpegts_atsc_stt_free);
static gpointer
_parse_atsc_stt (GstMpegtsSection * section)
{
GstMpegtsAtscSTT *stt = NULL;
guint8 *data, *end;
guint16 daylight_saving;
stt = g_slice_new0 (GstMpegtsAtscSTT);
data = section->data;
end = data + section->section_length;
/* Skip already parsed data */
data += 8;
stt->protocol_version = GST_READ_UINT8 (data);
data += 1;
stt->system_time = GST_READ_UINT32_BE (data);
data += 4;
stt->gps_utc_offset = GST_READ_UINT8 (data);
data += 1;
daylight_saving = GST_READ_UINT16_BE (data);
data += 2;
stt->ds_status = daylight_saving >> 15;
stt->ds_dayofmonth = (daylight_saving >> 8) & 0x1F;
stt->ds_hour = daylight_saving & 0xFF;
stt->descriptors = gst_mpegts_parse_descriptors (data, end - data - 4);
if (stt->descriptors == NULL)
goto error;
return (gpointer) stt;
error:
_gst_mpegts_atsc_stt_free (stt);
return NULL;
}
static gboolean
_packetize_stt (GstMpegtsSection * section)
{
const GstMpegtsAtscSTT *stt;
guint8 *data;
gsize length;
guint i;
stt = gst_mpegts_section_get_atsc_stt (section);
if (stt == NULL)
return FALSE;
/* 8 byte common section fields
* 1 byte protocol version
* 4 byte system time
* 1 byte GPS_UTC_offset
* 2 byte daylight saving
* 4 byte CRC
*/
length = 20;
if (stt->descriptors) {
for (i = 0; i < stt->descriptors->len; i++) {
GstMpegtsDescriptor *descriptor = g_ptr_array_index (stt->descriptors, i);
length += descriptor->length + 2;
}
}
_packetize_common_section (section, length);
data = section->data + 8;
/* protocol_version - 8 bit */
GST_WRITE_UINT8 (data, stt->protocol_version);
data += 1;
/* system time - 32 bit uimsbf */
GST_WRITE_UINT32_BE (data, stt->system_time);
data += 4;
/* GPS_UTC_offset - 8 bit */
GST_WRITE_UINT8 (data, stt->gps_utc_offset);
data += 1;
/* daylight_saving - 16 bit uimsbf */
GST_WRITE_UINT8 (data,
(stt->ds_status << 7) | 0x60 | (stt->ds_dayofmonth & 0x1f));
data += 1;
GST_WRITE_UINT8 (data, stt->ds_hour);
data += 1;
_packetize_descriptor_array (stt->descriptors, &data);
return TRUE;
}
/**
* gst_mpegts_section_section_from_atsc_stt:
* @stt: (transfer full): a #GstMpegtsAtscSTT to create the #GstMpegtsSection from
*
* Returns: (transfer full): the #GstMpegtsSection
* Since: 1.18
*/
GstMpegtsSection *
gst_mpegts_section_from_atsc_stt (GstMpegtsAtscSTT * stt)
{
GstMpegtsSection *section;
g_return_val_if_fail (stt != NULL, NULL);
section = _gst_mpegts_section_init (0x1ffb,
GST_MTS_TABLE_ID_ATSC_SYSTEM_TIME);
section->subtable_extension = 0x0000;
section->cached_parsed = (gpointer) stt;
section->packetizer = _packetize_stt;
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_stt_free;
return section;
}
/**
* gst_mpegts_section_get_atsc_stt:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_STT
*
* Returns the #GstMpegtsAtscSTT contained in the @section.
*
* Returns: The #GstMpegtsAtscSTT contained in the section, or %NULL if an error
* happened.
*/
const GstMpegtsAtscSTT *
gst_mpegts_section_get_atsc_stt (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_STT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed =
__common_section_checks (section, 20, _parse_atsc_stt,
(GDestroyNotify) _gst_mpegts_atsc_stt_free);
return (const GstMpegtsAtscSTT *) section->cached_parsed;
}
/**
* gst_mpegts_section_atsc_stt_new:
*
* Returns: (transfer full): #GstMpegtsAtscSTT
* Since: 1.18
*/
GstMpegtsAtscSTT *
gst_mpegts_atsc_stt_new (void)
{
GstMpegtsAtscSTT *stt;
stt = g_slice_new0 (GstMpegtsAtscSTT);
stt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
gst_mpegts_descriptor_free);
return stt;
}
#define GPS_TO_UTC_TICKS G_GINT64_CONSTANT(315964800)
static GstDateTime *
_gst_mpegts_atsc_gps_time_to_datetime (guint32 systemtime, guint8 gps_offset)
{
return gst_date_time_new_from_unix_epoch_utc (systemtime - gps_offset +
GPS_TO_UTC_TICKS);
}
GstDateTime *
gst_mpegts_atsc_stt_get_datetime_utc (GstMpegtsAtscSTT * stt)
{
if (stt->utc_datetime == NULL)
stt->utc_datetime = _gst_mpegts_atsc_gps_time_to_datetime (stt->system_time,
stt->gps_utc_offset);
if (stt->utc_datetime)
return gst_date_time_ref (stt->utc_datetime);
return NULL;
}
/* RRT */
static GstMpegtsAtscRRTDimensionValue *
_gst_mpegts_atsc_rrt_dimension_value_copy (GstMpegtsAtscRRTDimensionValue *
value)
{
GstMpegtsAtscRRTDimensionValue *copy;
copy = g_slice_dup (GstMpegtsAtscRRTDimensionValue, value);
copy->abbrev_ratings = g_ptr_array_ref (value->abbrev_ratings);
copy->ratings = g_ptr_array_ref (value->ratings);
return copy;
}
static void
_gst_mpegts_atsc_rrt_dimension_value_free (GstMpegtsAtscRRTDimensionValue *
value)
{
if (value->abbrev_ratings)
g_ptr_array_unref (value->abbrev_ratings);
if (value->ratings)
g_ptr_array_unref (value->ratings);
g_slice_free (GstMpegtsAtscRRTDimensionValue, value);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRTDimensionValue,
gst_mpegts_atsc_rrt_dimension_value,
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_dimension_value_copy,
(GFreeFunc) _gst_mpegts_atsc_rrt_dimension_value_free);
static GstMpegtsAtscRRTDimension *
_gst_mpegts_atsc_rrt_dimension_copy (GstMpegtsAtscRRTDimension * dim)
{
GstMpegtsAtscRRTDimension *copy;
copy = g_slice_dup (GstMpegtsAtscRRTDimension, dim);
copy->names = g_ptr_array_ref (dim->names);
copy->values = g_ptr_array_ref (dim->values);
return copy;
}
static void
_gst_mpegts_atsc_rrt_dimension_free (GstMpegtsAtscRRTDimension * dim)
{
if (dim->names)
g_ptr_array_unref (dim->names);
if (dim->values)
g_ptr_array_unref (dim->values);
g_slice_free (GstMpegtsAtscRRTDimension, dim);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRTDimension, gst_mpegts_atsc_rrt_dimension,
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_dimension_copy,
(GFreeFunc) _gst_mpegts_atsc_rrt_dimension_free);
static GstMpegtsAtscRRT *
_gst_mpegts_atsc_rrt_copy (GstMpegtsAtscRRT * rrt)
{
GstMpegtsAtscRRT *copy;
copy = g_slice_dup (GstMpegtsAtscRRT, rrt);
copy->names = g_ptr_array_ref (rrt->names);
copy->dimensions = g_ptr_array_ref (rrt->dimensions);
copy->descriptors = g_ptr_array_ref (rrt->descriptors);
return copy;
}
static void
_gst_mpegts_atsc_rrt_free (GstMpegtsAtscRRT * rrt)
{
if (rrt->names)
g_ptr_array_unref (rrt->names);
if (rrt->dimensions)
g_ptr_array_unref (rrt->dimensions);
if (rrt->descriptors)
g_ptr_array_unref (rrt->descriptors);
g_slice_free (GstMpegtsAtscRRT, rrt);
}
G_DEFINE_BOXED_TYPE (GstMpegtsAtscRRT, gst_mpegts_atsc_rrt,
(GBoxedCopyFunc) _gst_mpegts_atsc_rrt_copy,
(GFreeFunc) _gst_mpegts_atsc_rrt_free);
static gpointer
_parse_rrt (GstMpegtsSection * section)
{
GstMpegtsAtscRRT *rrt = NULL;
guint i = 0;
guint8 *data;
guint16 descriptors_loop_length;
guint8 text_length;
rrt = g_slice_new0 (GstMpegtsAtscRRT);
data = section->data;
/* Skip already parsed data */
data += 8;
rrt->protocol_version = GST_READ_UINT8 (data);
data += 1;
text_length = GST_READ_UINT8 (data);
data += 1;
rrt->names = _parse_atsc_mult_string (data, text_length);
data += text_length;
rrt->dimensions_defined = GST_READ_UINT8 (data);
data += 1;
rrt->dimensions = g_ptr_array_new_full (rrt->dimensions_defined,
(GDestroyNotify) _gst_mpegts_atsc_rrt_dimension_free);
for (i = 0; i < rrt->dimensions_defined; i++) {
GstMpegtsAtscRRTDimension *dim;
guint8 tmp;
guint j = 0;
dim = g_slice_new0 (GstMpegtsAtscRRTDimension);
g_ptr_array_add (rrt->dimensions, dim);
text_length = GST_READ_UINT8 (data);
data += 1;
dim->names = _parse_atsc_mult_string (data, text_length);
data += text_length;
tmp = GST_READ_UINT8 (data);
data += 1;
dim->graduated_scale = tmp & 0x10;
dim->values_defined = tmp & 0x0f;
dim->values = g_ptr_array_new_full (dim->values_defined,
(GDestroyNotify) _gst_mpegts_atsc_rrt_dimension_value_free);
for (j = 0; j < dim->values_defined; j++) {
GstMpegtsAtscRRTDimensionValue *val;
val = g_slice_new0 (GstMpegtsAtscRRTDimensionValue);
g_ptr_array_add (dim->values, val);
text_length = GST_READ_UINT8 (data);
data += 1;
val->abbrev_ratings = _parse_atsc_mult_string (data, text_length);
data += text_length;
text_length = GST_READ_UINT8 (data);
data += 1;
val->ratings = _parse_atsc_mult_string (data, text_length);
data += text_length;
}
}
descriptors_loop_length = GST_READ_UINT16_BE (data) & 0x3FF;
data += 2;
rrt->descriptors =
gst_mpegts_parse_descriptors (data, descriptors_loop_length);
return (gpointer) rrt;
}
static gboolean
_packetize_rrt (GstMpegtsSection * section)
{
const GstMpegtsAtscRRT *rrt;
guint8 *data, *pos;
gsize length;
gsize names_length;
guint i, j;
rrt = gst_mpegts_section_get_atsc_rrt (section);
if (rrt == NULL)
return FALSE;
names_length = _get_atsc_mult_string_packetized_length (rrt->names);
/* 8 byte common section fields
* 1 byte protocol version
* 1 byte rating_region_name_length
* name_length bytes
* 1 byte dimensions_defined
* 2 byte reserved / descriptors_length
* 4 byte CRC
*/
length = names_length + 17;
for (i = 0; i < rrt->dimensions->len; i++) {
GstMpegtsAtscRRTDimension *dim = g_ptr_array_index (rrt->dimensions, i);
/* 1 byte dimension_name_length
* 1 byte reserved / graduated_scale / values_defined
*/
length += 2;
length += _get_atsc_mult_string_packetized_length (dim->names);
for (j = 0; j < dim->values->len; j++) {
GstMpegtsAtscRRTDimensionValue *val = g_ptr_array_index (dim->values, j);
/* 1 byte abbrev_rating_value_length
* 1 byte rating_value_length
*/
length += 2;
length += _get_atsc_mult_string_packetized_length (val->abbrev_ratings);
length += _get_atsc_mult_string_packetized_length (val->ratings);
}
}
if (rrt->descriptors) {
for (i = 0; i < rrt->descriptors->len; i++) {
GstMpegtsDescriptor *descriptor = g_ptr_array_index (rrt->descriptors, i);
length += descriptor->length + 2;
}
}
if (length > 1024) {
GST_WARNING ("RRT size can not exceed 1024");
return FALSE;
}
_packetize_common_section (section, length);
data = section->data + 8;
/* protocol_version - 8 bit */
GST_WRITE_UINT8 (data, rrt->protocol_version);
data += 1;
/* rating_region_name_length - 8 bit */
GST_WRITE_UINT8 (data, names_length);
data += 1;
_packetize_atsc_mult_string (rrt->names, &data);
for (i = 0; i < rrt->dimensions->len; i++) {
GstMpegtsAtscRRTDimension *dim = g_ptr_array_index (rrt->dimensions, i);
/* dimension_name_length - 8 bit */
GST_WRITE_UINT8 (data,
_get_atsc_mult_string_packetized_length (dim->names));
data += 1;
_packetize_atsc_mult_string (rrt->names, &data);
/* 3 bit reserved / 1 bit graduated_scale / 4 bit values_defined */
GST_WRITE_UINT8 (data,
0xe0 | ((dim->graduated_scale ? 1 : 0) << 4) | (dim->
values_defined & 0x0f));
data += 1;
for (j = 0; j < dim->values->len; j++) {
GstMpegtsAtscRRTDimensionValue *val = g_ptr_array_index (dim->values, j);
/* abbrev_rating_value_length - 8 bit */
GST_WRITE_UINT8 (data,
_get_atsc_mult_string_packetized_length (val->abbrev_ratings));
data += 1;
_packetize_atsc_mult_string (val->abbrev_ratings, &data);
/* rating_value_length - 8 bit */
GST_WRITE_UINT8 (data,
_get_atsc_mult_string_packetized_length (val->ratings));
data += 1;
_packetize_atsc_mult_string (val->ratings, &data);
}
}
/* 6 bit reserved, 10 bit descriptor_length uimsbf */
pos = data;
*data++ = 0xFC;
*data++ = 0x00;
_packetize_descriptor_array (rrt->descriptors, &data);
/* Go back and update the descriptor length */
GST_WRITE_UINT16_BE (pos, (data - pos - 2) | 0xFC00);
return TRUE;
}
/**
* gst_mpegts_section_section_from_atsc_rrt:
* @rrt: (transfer full): a #GstMpegtsAtscRRT to create the #GstMpegtsSection from
*
* Returns: (transfer full): the #GstMpegtsSection
* Since: 1.18
*/
GstMpegtsSection *
gst_mpegts_section_from_atsc_rrt (GstMpegtsAtscRRT * rrt)
{
GstMpegtsSection *section;
g_return_val_if_fail (rrt != NULL, NULL);
section = _gst_mpegts_section_init (0x1ffb,
GST_MTS_TABLE_ID_ATSC_RATING_REGION);
/* FIXME random rating_region, what should be the default? */
section->subtable_extension = 0xff01;
section->cached_parsed = (gpointer) rrt;
section->packetizer = _packetize_rrt;
section->destroy_parsed = (GDestroyNotify) _gst_mpegts_atsc_rrt_free;
return section;
}
/**
* gst_mpegts_section_get_atsc_rrt:
* @section: a #GstMpegtsSection of type %GST_MPEGTS_SECTION_ATSC_RRT
*
* Returns the #GstMpegtsAtscRRT contained in the @section.
*
* Returns: The #GstMpegtsAtscRRT contained in the section, or %NULL if an error
* happened.
* Since: 1.18
*/
const GstMpegtsAtscRRT *
gst_mpegts_section_get_atsc_rrt (GstMpegtsSection * section)
{
g_return_val_if_fail (section->section_type == GST_MPEGTS_SECTION_ATSC_RRT,
NULL);
g_return_val_if_fail (section->cached_parsed || section->data, NULL);
if (!section->cached_parsed)
section->cached_parsed =
__common_section_checks (section, 17, _parse_rrt,
(GDestroyNotify) _gst_mpegts_atsc_rrt_free);
return (const GstMpegtsAtscRRT *) section->cached_parsed;
}
/**
* gst_mpegts_section_atsc_rrt_dimension_value_new:
*
* Returns: (transfer full): #GstMpegtsAtscRRTDimensionValue
* Since: 1.18
*/
GstMpegtsAtscRRTDimensionValue *
gst_mpegts_atsc_rrt_dimension_value_new (void)
{
GstMpegtsAtscRRTDimensionValue *val;
val = g_slice_new0 (GstMpegtsAtscRRTDimensionValue);
val->abbrev_ratings = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_mult_string_free);
val->ratings = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_mult_string_free);
return val;
}
/**
* gst_mpegts_section_atsc_rrt_dimension_new:
*
* Returns: (transfer full): #GstMpegtsAtscRRTDimension
* Since: 1.18
*/
GstMpegtsAtscRRTDimension *
gst_mpegts_atsc_rrt_dimension_new (void)
{
GstMpegtsAtscRRTDimension *dim;
dim = g_slice_new0 (GstMpegtsAtscRRTDimension);
dim->names = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_mult_string_free);
dim->values = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_rrt_dimension_value_free);
return dim;
}
/**
* gst_mpegts_section_atsc_rrt_new:
*
* Returns: (transfer full): #GstMpegtsAtscRRT
* Since: 1.18
*/
GstMpegtsAtscRRT *
gst_mpegts_atsc_rrt_new (void)
{
GstMpegtsAtscRRT *rrt;
rrt = g_slice_new0 (GstMpegtsAtscRRT);
rrt->names = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_mult_string_free);
rrt->dimensions = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_atsc_rrt_dimension_free);
rrt->descriptors = g_ptr_array_new_with_free_func ((GDestroyNotify)
gst_mpegts_descriptor_free);
return rrt;
}