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gstreamer/gst-libs/gst/mpegts/gst-dvb-descriptor.c

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/*
* gstmpegtsdescriptor.c -
* Copyright (C) 2013 Edward Hervey
*
* Authors:
* Edward Hervey <edward@collabora.com>
*
* 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 <stdlib.h>
#include <string.h>
#include "mpegts.h"
#include "gstmpegts-private.h"
/**
* SECTION:gst-dvb-descriptor
* @title: DVB variants of MPEG-TS descriptors
* @short_description: Descriptors for the various DVB specifications
* @include: gst/mpegts/mpegts.h
*
*/
/*
* TODO
*
* * Add common validation code for data presence and minimum/maximum expected
* size.
* * Add parsing methods for the following descriptors that were previously
* handled in mpegtsbase:
* * GST_MTS_DESC_DVB_DATA_BROADCAST_ID
* * GST_MTS_DESC_DVB_CAROUSEL_IDENTIFIER
*/
#define BCD_UN(a) ((a) & 0x0f)
#define BCD_DEC(a) (((a) >> 4) & 0x0f)
#define BCD(a) (BCD_UN(a) + 10 * BCD_DEC(a))
#define BCD_16(a) (BCD(a[1]) + 100 * BCD(a[0]))
#define BCD_28(a) (BCD_DEC(a[3]) + 10 * BCD(a[2]) + 1000 * BCD(a[1]) + 100000 * BCD(a[0]))
#define BCD_32(a) (BCD(a[3]) + 100 * BCD(a[2]) + 10000 * BCD(a[1]) + 1000000 * BCD(a[0]))
#define DEFINE_STATIC_COPY_FUNCTION(type, name) \
static type * _##name##_copy (type * source) \
{ \
return g_slice_dup (type, source); \
}
#define DEFINE_STATIC_FREE_FUNCTION(type, name) \
static void _##name##_free (type * source) \
{ \
g_slice_free (type, source); \
}
/* GST_MTS_DESC_DVB_NETWORK_NAME (0x40) */
/**
* gst_mpegts_descriptor_parse_dvb_network_name:
* @descriptor: a %GST_MTS_DESC_DVB_NETWORK_NAME #GstMpegtsDescriptor
* @name: (out) (transfer full): the extracted name
*
* Parses out the dvb network name from the @descriptor:
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_network_name (const GstMpegtsDescriptor *
descriptor, gchar ** name)
{
g_return_val_if_fail (descriptor != NULL && name != NULL, FALSE);
/* We need at least one byte of data for the string */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_NETWORK_NAME, 1, FALSE);
*name = get_encoding_and_convert ((gchar *) descriptor->data + 2,
descriptor->data[1]);
return TRUE;
}
/**
* gst_mpegts_descriptor_from_dvb_network_name:
* @name: the network name to set
*
* Creates a #GstMpegtsDescriptor to be a %GST_MTS_DESC_DVB_NETWORK_NAME,
* with the network name @name. The data field of the #GstMpegtsDescriptor
* will be allocated, and transferred to the caller.
*
* Returns: (transfer full): the #GstMpegtsDescriptor or %NULL on fail
*/
GstMpegtsDescriptor *
gst_mpegts_descriptor_from_dvb_network_name (const gchar * name)
{
GstMpegtsDescriptor *descriptor;
guint8 *converted_name;
gsize size;
g_return_val_if_fail (name != NULL, NULL);
converted_name = dvb_text_from_utf8 (name, &size);
if (size >= 256) {
g_free (converted_name);
return NULL;
}
if (!converted_name) {
GST_WARNING ("Could not find proper encoding for string `%s`", name);
return NULL;
}
descriptor = _new_descriptor (GST_MTS_DESC_DVB_NETWORK_NAME, size);
memcpy (descriptor->data + 2, converted_name, size);
g_free (converted_name);
return descriptor;
}
/* GST_MTS_DESC_DVB_SERVICE_LIST (0x41) */
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsDVBServiceListItem,
gst_mpegts_dvb_service_list_item);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsDVBServiceListItem,
gst_mpegts_dvb_service_list_item);
G_DEFINE_BOXED_TYPE (GstMpegtsDVBServiceListItem,
gst_mpegts_dvb_service_list_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_service_list_item_copy,
(GFreeFunc) _gst_mpegts_dvb_service_list_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_service_list:
* @descriptor: a %GST_MTS_DESC_DVB_SERVICE_LIST #GstMpegtsDescriptor
* @list: (out) (transfer full) (element-type GstMpegtsDVBServiceListItem):
* the list of services
*
* Parses out a list of services from the @descriptor:
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_service_list (const GstMpegtsDescriptor *
descriptor, GPtrArray ** list)
{
guint8 *data, i;
g_return_val_if_fail (descriptor != NULL && list != NULL, FALSE);
/* a entry has 3 bytes, 2 for service id, 1 for service type */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_SERVICE_LIST, 3, FALSE);
data = (guint8 *) descriptor->data + 2;
*list = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_service_list_item_free);
for (i = 0; i < descriptor->length - 2; i += 3) {
GstMpegtsDVBServiceListItem *item =
g_slice_new0 (GstMpegtsDVBServiceListItem);
g_ptr_array_add (*list, item);
item->service_id = GST_READ_UINT16_BE (data);
data += 2;
item->type = *data;
data += 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_STUFFING (0x42) */
/**
* gst_mpegts_descriptor_parse_dvb_stuffing:
* @descriptor: a %GST_MTS_DESC_DVB_STUFFING #GstMpegtsDescriptor
* @stuffing_bytes: (out) (transfer full): the stuffing bytes
*
* Parses out the stuffing bytes from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_stuffing (const GstMpegtsDescriptor *
descriptor, guint8 ** stuffing_bytes)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && stuffing_bytes != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_STUFFING, FALSE);
data = (guint8 *) descriptor->data + 2;
*stuffing_bytes = g_memdup (data, descriptor->length);
return TRUE;
}
/* GST_MTS_DESC_DVB_SATELLITE_DELIVERY_SYSTEM (0x43) */
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsSatelliteDeliverySystemDescriptor,
gst_mpegts_satellite_delivery_system_descriptor);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsSatelliteDeliverySystemDescriptor,
gst_mpegts_satellite_delivery_system_descriptor);
G_DEFINE_BOXED_TYPE (GstMpegtsSatelliteDeliverySystemDescriptor,
gst_mpegts_satellite_delivery_system_descriptor,
(GBoxedCopyFunc) _gst_mpegts_satellite_delivery_system_descriptor_copy,
(GFreeFunc) _gst_mpegts_satellite_delivery_system_descriptor_free);
/**
* gst_mpegts_descriptor_parse_satellite_delivery_system:
* @descriptor: a %GST_MTS_DESC_DVB_SATELLITE_DELIVERY_SYSTEM #GstMpegtsDescriptor
* @res: (out) (transfer none): the #GstMpegtsSatelliteDeliverySystemDescriptor to fill
*
* Extracts the satellite delivery system information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_satellite_delivery_system (const GstMpegtsDescriptor
* descriptor, GstMpegtsSatelliteDeliverySystemDescriptor * res)
{
guint8 *data;
guint8 tmp;
g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE);
/* This descriptor is always 11 bytes long */
__common_desc_checks_exact (descriptor,
GST_MTS_DESC_DVB_SATELLITE_DELIVERY_SYSTEM, 11, FALSE);
data = (guint8 *) descriptor->data + 2;
/* BCD coded frequency in GHz (decimal point occurs after the 3rd character)
* So direct BCD gives us units of (GHz / 100 000) = 10 kHz*/
res->frequency = BCD_32 (data) * 10;
data += 4;
/* BCD codec position in degrees (float pointer after the 3rd character) */
res->orbital_position = (BCD_16 (data)) / 10.0;
data += 2;
tmp = *data;
res->west_east = (tmp & 0x80) == 0x80;
res->polarization = (tmp >> 7) & 0x03;
res->modulation_system = (tmp & 0x04) == 0x04;
if (res->modulation_system)
res->roll_off = (tmp >> 3 & 0x03);
else
res->roll_off = GST_MPEGTS_ROLLOFF_AUTO;
switch (tmp & 0x03) {
case 0x00:
res->modulation_type = GST_MPEGTS_MODULATION_QAM_AUTO;
break;
case 0x01:
res->modulation_type = GST_MPEGTS_MODULATION_QPSK;
break;
case 0x02:
res->modulation_type = GST_MPEGTS_MODULATION_PSK_8;
break;
case 0x03:
res->modulation_type = GST_MPEGTS_MODULATION_QAM_16;
break;
default:
res->modulation_type = GST_MPEGTS_MODULATION_QAM_AUTO;
break;
}
data += 1;
/* symbol_rate is in Msymbols/ (decimal point occurs after 3rd character) */
/* So direct BCD gives us units of (Msymbol / 10 000) = 100 sym/s */
res->symbol_rate = BCD_28 (data) * 100;
data += 3;
/* fec_inner */
switch (*data >> 4) {
case 0x01:
res->fec_inner = GST_MPEGTS_FEC_1_2;
break;
case 0x02:
res->fec_inner = GST_MPEGTS_FEC_2_3;
break;
case 0x03:
res->fec_inner = GST_MPEGTS_FEC_3_4;
break;
case 0x04:
res->fec_inner = GST_MPEGTS_FEC_5_6;
break;
case 0x05:
res->fec_inner = GST_MPEGTS_FEC_7_8;
break;
case 0x06:
res->fec_inner = GST_MPEGTS_FEC_8_9;
break;
case 0x07:
res->fec_inner = GST_MPEGTS_FEC_3_5;
break;
case 0x08:
res->fec_inner = GST_MPEGTS_FEC_4_5;
break;
case 0x09:
res->fec_inner = GST_MPEGTS_FEC_9_10;
break;
case 0x0f:
res->fec_inner = GST_MPEGTS_FEC_NONE;
break;
default:
res->fec_inner = GST_MPEGTS_FEC_AUTO;
break;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_CABLE_DELIVERY_SYSTEM (0x44) */
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsCableDeliverySystemDescriptor,
gst_mpegts_dvb_cable_delivery_system_descriptor);
void gst_mpegts_dvb_cable_delivery_system_descriptor_free
(GstMpegtsCableDeliverySystemDescriptor * source)
{
g_slice_free (GstMpegtsCableDeliverySystemDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsCableDeliverySystemDescriptor,
gst_mpegts_dvb_cable_delivery_system_descriptor,
(GBoxedCopyFunc) _gst_mpegts_dvb_cable_delivery_system_descriptor_copy,
(GFreeFunc) gst_mpegts_dvb_cable_delivery_system_descriptor_free);
/**
* gst_mpegts_descriptor_parse_cable_delivery_system:
* @descriptor: a %GST_MTS_DESC_DVB_CABLE_DELIVERY_SYSTEM #GstMpegtsDescriptor
* @res: (out) (transfer none): the #GstMpegtsCableDeliverySystemDescriptor to fill
*
* Extracts the cable delivery system information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_cable_delivery_system (const GstMpegtsDescriptor *
descriptor, GstMpegtsCableDeliverySystemDescriptor * res)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE);
/* This descriptor is always 11 bytes long */
__common_desc_checks_exact (descriptor,
GST_MTS_DESC_DVB_CABLE_DELIVERY_SYSTEM, 11, FALSE);
data = (guint8 *) descriptor->data + 2;
/* BCD in MHz, decimal place after the fourth character */
res->frequency = BCD_32 (data) * 100;
data += 5;
/* fec_out (4bits) */
res->outer_fec = *data++ & 0x0f;
switch (*data) {
case 0x00:
res->modulation = GST_MPEGTS_MODULATION_NONE;
break;
case 0x01:
res->modulation = GST_MPEGTS_MODULATION_QAM_16;
break;
case 0x02:
res->modulation = GST_MPEGTS_MODULATION_QAM_32;
break;
case 0x03:
res->modulation = GST_MPEGTS_MODULATION_QAM_64;
break;
case 0x04:
res->modulation = GST_MPEGTS_MODULATION_QAM_128;
break;
case 0x05:
res->modulation = GST_MPEGTS_MODULATION_QAM_256;
break;
default:
GST_WARNING ("Unsupported cable modulation type: 0x%02x", *data);
res->modulation = GST_MPEGTS_MODULATION_NONE;
break;
}
data += 1;
/* symbol_rate is in Msymbols/ (decimal point occurs after 3rd character) */
/* So direct BCD gives us units of (Msymbol / 10 000) = 100 sym/s */
res->symbol_rate = BCD_28 (data) * 100;
data += 3;
/* fec_inner */
switch (*data & 0xf) {
case 0x00:
res->fec_inner = GST_MPEGTS_FEC_AUTO;
break;
case 0x01:
res->fec_inner = GST_MPEGTS_FEC_1_2;
break;
case 0x02:
res->fec_inner = GST_MPEGTS_FEC_2_3;
break;
case 0x03:
res->fec_inner = GST_MPEGTS_FEC_3_4;
break;
case 0x04:
res->fec_inner = GST_MPEGTS_FEC_5_6;
break;
case 0x05:
res->fec_inner = GST_MPEGTS_FEC_7_8;
break;
case 0x06:
res->fec_inner = GST_MPEGTS_FEC_8_9;
break;
case 0x07:
res->fec_inner = GST_MPEGTS_FEC_3_5;
break;
case 0x08:
res->fec_inner = GST_MPEGTS_FEC_4_5;
break;
case 0x09:
res->fec_inner = GST_MPEGTS_FEC_9_10;
break;
case 0x0f:
res->fec_inner = GST_MPEGTS_FEC_NONE;
break;
default:
res->fec_inner = GST_MPEGTS_FEC_AUTO;
break;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_BOUQUET_NAME (0x47) */
/**
* gst_mpegts_descriptor_parse_dvb_bouquet_name:
* @bouquet_name: (out) (transfer full) (allow-none): the bouquet name
*
* Extracts the bouquet name from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_bouquet_name (const GstMpegtsDescriptor *
descriptor, gchar ** bouquet_name)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && bouquet_name != NULL, FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_BOUQUET_NAME, 1, FALSE);
data = (guint8 *) descriptor->data + 2;
*bouquet_name =
get_encoding_and_convert ((const gchar *) data, descriptor->length);
return TRUE;
}
/* GST_MTS_DESC_DVB_SERVICE (0x48) */
/**
* gst_mpegts_descriptor_parse_dvb_service:
* @descriptor: a %GST_MTS_DESC_DVB_SERVICE #GstMpegtsDescriptor
* @service_type: (out) (allow-none): the service type
* @service_name: (out) (transfer full) (allow-none): the service name
* @provider_name: (out) (transfer full) (allow-none): the provider name
*
* Extracts the dvb service information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_service (const GstMpegtsDescriptor *
descriptor, GstMpegtsDVBServiceType * service_type, gchar ** service_name,
gchar ** provider_name)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL, FALSE);
/* Need at least 3 bytes (type and 2 bytes for the string length) */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_SERVICE, 3, FALSE);
data = (guint8 *) descriptor->data + 2;
if (service_type)
*service_type = *data;
data += 1;
if (provider_name)
*provider_name = get_encoding_and_convert ((const gchar *) data + 1, *data);
data += *data + 1;
if (service_name)
*service_name = get_encoding_and_convert ((const gchar *) data + 1, *data);
return TRUE;
}
/**
* gst_mpegts_descriptor_from_dvb_service:
* @service_type: Service type defined as a #GstMpegtsDVBServiceType
* @service_name: (allow-none): Name of the service
* @service_provider: (allow-none): Name of the service provider
*
* Fills a #GstMpegtsDescriptor to be a %GST_MTS_DESC_DVB_SERVICE.
* The data field of the #GstMpegtsDescriptor will be allocated,
* and transferred to the caller.
*
* Returns: (transfer full): the #GstMpegtsDescriptor or %NULL on fail
*/
GstMpegtsDescriptor *
gst_mpegts_descriptor_from_dvb_service (GstMpegtsDVBServiceType service_type,
const gchar * service_name, const gchar * service_provider)
{
GstMpegtsDescriptor *descriptor = NULL;
guint8 *conv_provider_name = NULL, *conv_service_name = NULL;
gsize provider_size = 0, service_size = 0;
guint8 *data;
if (service_provider) {
conv_provider_name = dvb_text_from_utf8 (service_provider, &provider_size);
if (!conv_provider_name) {
GST_WARNING ("Could not find proper encoding for string `%s`",
service_provider);
goto beach;
}
}
if (provider_size >= 256) {
GST_WARNING ("Service provider string too big (%" G_GSIZE_FORMAT " > 256)",
provider_size);
goto beach;
}
if (service_name) {
conv_service_name = dvb_text_from_utf8 (service_name, &service_size);
if (!conv_service_name) {
GST_WARNING ("Could not find proper encoding for string `%s`",
service_name);
goto beach;
}
}
if (service_size >= 256) {
GST_WARNING ("Service name string too big (%" G_GSIZE_FORMAT " > 256)",
service_size);
goto beach;
}
descriptor =
_new_descriptor (GST_MTS_DESC_DVB_SERVICE,
3 + provider_size + service_size);
data = descriptor->data + 2;
*data++ = service_type;
*data++ = provider_size;
if (conv_provider_name)
memcpy (data, conv_provider_name, provider_size);
data += provider_size;
*data++ = service_size;
if (conv_service_name)
memcpy (data, conv_service_name, service_size);
beach:
g_free (conv_service_name);
g_free (conv_provider_name);
return descriptor;
}
/* GST_MTS_DESC_DVB_LINKAGE (0x4A) */
static GstMpegtsDVBLinkageDescriptor *
_gst_mpegts_dvb_linkage_descriptor_copy (GstMpegtsDVBLinkageDescriptor * source)
{
GstMpegtsDVBLinkageDescriptor *copy;
copy = g_slice_dup (GstMpegtsDVBLinkageDescriptor, source);
switch (source->linkage_type) {
case GST_MPEGTS_DVB_LINKAGE_MOBILE_HAND_OVER:
copy->linkage_data = g_slice_dup (GstMpegtsDVBLinkageMobileHandOver,
source->linkage_data);
break;
case GST_MPEGTS_DVB_LINKAGE_EVENT:
copy->linkage_data = g_slice_dup (GstMpegtsDVBLinkageEvent,
source->linkage_data);
break;
case GST_MPEGTS_DVB_LINKAGE_EXTENDED_EVENT:
copy->linkage_data = g_ptr_array_ref (source->linkage_data);
break;
default:
break;
}
copy->private_data_bytes = g_memdup (source->private_data_bytes,
source->private_data_length);
return copy;
}
void
gst_mpegts_dvb_linkage_descriptor_free (GstMpegtsDVBLinkageDescriptor * source)
{
if (source->linkage_data)
switch (source->linkage_type) {
case GST_MPEGTS_DVB_LINKAGE_MOBILE_HAND_OVER:
g_slice_free (GstMpegtsDVBLinkageMobileHandOver, source->linkage_data);
break;
case GST_MPEGTS_DVB_LINKAGE_EVENT:
g_slice_free (GstMpegtsDVBLinkageEvent, source->linkage_data);
break;
case GST_MPEGTS_DVB_LINKAGE_EXTENDED_EVENT:
g_ptr_array_unref (source->linkage_data);
break;
default:
break;
}
g_free (source->private_data_bytes);
g_slice_free (GstMpegtsDVBLinkageDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDVBLinkageDescriptor,
gst_mpegts_dvb_linkage_descriptor,
(GBoxedCopyFunc) _gst_mpegts_dvb_linkage_descriptor_copy,
(GFreeFunc) gst_mpegts_dvb_linkage_descriptor_free);
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsDVBLinkageMobileHandOver,
gst_mpegts_dvb_linkage_mobile_hand_over);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsDVBLinkageMobileHandOver,
gst_mpegts_dvb_linkage_mobile_hand_over);
G_DEFINE_BOXED_TYPE (GstMpegtsDVBLinkageMobileHandOver,
gst_mpegts_dvb_linkage_mobile_hand_over,
(GBoxedCopyFunc) _gst_mpegts_dvb_linkage_mobile_hand_over_copy,
(GFreeFunc) _gst_mpegts_dvb_linkage_mobile_hand_over_free);
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsDVBLinkageEvent,
gst_mpegts_dvb_linkage_event);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsDVBLinkageEvent,
gst_mpegts_dvb_linkage_event);
G_DEFINE_BOXED_TYPE (GstMpegtsDVBLinkageEvent,
gst_mpegts_dvb_linkage_event,
(GBoxedCopyFunc) _gst_mpegts_dvb_linkage_event_copy,
(GFreeFunc) _gst_mpegts_dvb_linkage_event_free);
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsDVBLinkageExtendedEvent,
gst_mpegts_dvb_linkage_extended_event);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsDVBLinkageExtendedEvent,
gst_mpegts_dvb_linkage_extended_event);
G_DEFINE_BOXED_TYPE (GstMpegtsDVBLinkageExtendedEvent,
gst_mpegts_dvb_linkage_extended_event,
(GBoxedCopyFunc) _gst_mpegts_dvb_linkage_extended_event_copy,
(GFreeFunc) _gst_mpegts_dvb_linkage_extended_event_free);
/**
* gst_mpegts_descriptor_parse_dvb_linkage:
* @descriptor: a %GST_MTS_DESC_DVB_LINKAGE #GstMpegtsDescriptor
* @res: (out) (transfer full): the #GstMpegtsDVBLinkageDescriptor to fill
*
* Extracts the DVB linkage information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_linkage (const GstMpegtsDescriptor * descriptor,
GstMpegtsDVBLinkageDescriptor ** desc)
{
guint i;
guint8 *data, *end;
GstMpegtsDVBLinkageDescriptor *res;
g_return_val_if_fail (descriptor != NULL && desc != NULL, FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_LINKAGE, 7, FALSE);
data = (guint8 *) descriptor->data + 2;
end = data + descriptor->length;
res = g_slice_new0 (GstMpegtsDVBLinkageDescriptor);
res->transport_stream_id = GST_READ_UINT16_BE (data);
data += 2;
res->original_network_id = GST_READ_UINT16_BE (data);
data += 2;
res->service_id = GST_READ_UINT16_BE (data);
data += 2;
res->linkage_type = *data;
data += 1;
switch (res->linkage_type) {
case GST_MPEGTS_DVB_LINKAGE_MOBILE_HAND_OVER:{
GstMpegtsDVBLinkageMobileHandOver *hand_over;
if (end - data < 1)
goto fail;
hand_over = g_slice_new0 (GstMpegtsDVBLinkageMobileHandOver);
res->linkage_data = (gpointer) hand_over;
hand_over->origin_type = (*data) & 0x01;
hand_over->hand_over_type = (*data >> 4) & 0x0f;
data += 1;
if (hand_over->hand_over_type ==
GST_MPEGTS_DVB_LINKAGE_HAND_OVER_IDENTICAL
|| hand_over->hand_over_type ==
GST_MPEGTS_DVB_LINKAGE_HAND_OVER_LOCAL_VARIATION
|| hand_over->hand_over_type ==
GST_MPEGTS_DVB_LINKAGE_HAND_OVER_ASSOCIATED) {
if (end - data < 2)
goto fail;
hand_over->network_id = GST_READ_UINT16_BE (data);
data += 2;
}
if (hand_over->origin_type == 0) {
if (end - data < 2)
goto fail;
hand_over->initial_service_id = GST_READ_UINT16_BE (data);
data += 2;
}
break;
}
case GST_MPEGTS_DVB_LINKAGE_EVENT:{
GstMpegtsDVBLinkageEvent *event;
if (end - data < 3)
goto fail;
event = g_slice_new0 (GstMpegtsDVBLinkageEvent);
res->linkage_data = (gpointer) event;
event->target_event_id = GST_READ_UINT16_BE (data);
data += 2;
event->target_listed = *data & 0x01;
event->event_simulcast = (*data >> 1) & 0x01;
data += 1;
break;
}
case GST_MPEGTS_DVB_LINKAGE_EXTENDED_EVENT:{
GPtrArray *ext_events;
ext_events = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_linkage_extended_event_free);
res->linkage_data = (gpointer) ext_events;
for (i = 0; i < *data++;) {
GstMpegtsDVBLinkageExtendedEvent *ext_event;
if (end - data < 3)
goto fail;
ext_event = g_slice_new0 (GstMpegtsDVBLinkageExtendedEvent);
g_ptr_array_add (res->linkage_data, ext_event);
ext_event->target_event_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
ext_event->target_listed = *data & 0x01;
ext_event->event_simulcast = (*data >> 1) & 0x01;
ext_event->link_type = (*data >> 3) & 0x03;
ext_event->target_id_type = (*data >> 5) & 0x03;
ext_event->original_network_id_flag = (*data >> 6) & 0x01;
ext_event->service_id_flag = (*data >> 7) & 0x01;
data += 1;
i += 1;
if (ext_event->target_id_type == 3) {
if (end - data < 2)
goto fail;
ext_event->user_defined_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
} else {
if (ext_event->target_id_type == 1) {
if (end - data < 2)
goto fail;
ext_event->target_transport_stream_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
}
if (ext_event->original_network_id_flag) {
if (end - data < 2)
goto fail;
ext_event->target_original_network_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
}
if (ext_event->service_id_flag) {
if (end - data < 2)
goto fail;
ext_event->target_service_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
}
}
}
break;
}
default:
break;
}
res->private_data_length = end - data;
res->private_data_bytes = g_memdup (data, res->private_data_length);
*desc = res;
return TRUE;
fail:
gst_mpegts_dvb_linkage_descriptor_free (res);
return FALSE;
}
/**
* gst_mpegts_dvb_linkage_descriptor_get_mobile_hand_over:
* @desc: the #GstMpegtsDVBLinkageDescriptor
*
* Returns: The #GstMpegtsDVBLinkageMobileHandOver or %NULL if an error happened
*/
const GstMpegtsDVBLinkageMobileHandOver *
gst_mpegts_dvb_linkage_descriptor_get_mobile_hand_over (const
GstMpegtsDVBLinkageDescriptor * desc)
{
g_return_val_if_fail (desc != NULL, NULL);
g_return_val_if_fail (desc->linkage_type ==
GST_MPEGTS_DVB_LINKAGE_MOBILE_HAND_OVER, NULL);
return (const GstMpegtsDVBLinkageMobileHandOver *) desc->linkage_data;
}
/**
* gst_mpegts_dvb_linkage_descriptor_get_event:
* @desc: the #GstMpegtsDVBLinkageDescriptor
*
* Returns: The #GstMpegtsDVBLinkageEvent or %NULL if an error happened
*/
const GstMpegtsDVBLinkageEvent *
gst_mpegts_dvb_linkage_descriptor_get_event (const GstMpegtsDVBLinkageDescriptor
* desc)
{
g_return_val_if_fail (desc != NULL, NULL);
g_return_val_if_fail (desc->linkage_type ==
GST_MPEGTS_DVB_LINKAGE_EVENT, NULL);
return (const GstMpegtsDVBLinkageEvent *) desc->linkage_data;
}
/**
* gst_mpegts_dvb_linkage_descriptor_get_extended_event:
* @desc: the #GstMpegtsDVBLinkageDescriptor
*
* Returns: (element-type GstMpegtsDVBLinkageExtendedEvent): an #GstMpegtsDVBLinkageExtendedEvent array or %NULL if an error happened
*/
const GPtrArray *
gst_mpegts_dvb_linkage_descriptor_get_extended_event (const
GstMpegtsDVBLinkageDescriptor * desc)
{
g_return_val_if_fail (desc != NULL, NULL);
g_return_val_if_fail (desc->linkage_type ==
GST_MPEGTS_DVB_LINKAGE_EXTENDED_EVENT, NULL);
return (const GPtrArray *) desc->linkage_data;
}
/* GST_MTS_DESC_DVB_SHORT_EVENT (0x4D) */
/**
* gst_mpegts_descriptor_parse_dvb_short_event:
* @descriptor: a %GST_MTS_DESC_DVB_SHORT_EVENT #GstMpegtsDescriptor
* @language_code: (out) (transfer full) (allow-none): the language code
* @event_name: (out) (transfer full) (allow-none): the event name
* @text: (out) (transfer full) (allow-none): the event text
*
* Extracts the DVB short event information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_short_event (const GstMpegtsDescriptor *
descriptor, gchar ** language_code, gchar ** event_name, gchar ** text)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL, FALSE);
/* Need at least 5 bytes (3 for language code, 2 for each string length) */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_SHORT_EVENT, 5, FALSE);
data = (guint8 *) descriptor->data + 2;
if (language_code)
*language_code = convert_lang_code (data);
data += 3;
if (event_name)
*event_name = get_encoding_and_convert ((const gchar *) data + 1, *data);
data += *data + 1;
if (text)
*text = get_encoding_and_convert ((const gchar *) data + 1, *data);
return TRUE;
}
/* GST_MTS_DESC_DVB_TELETEXT (0x56) */
/**
* gst_mpegts_descriptor_parse_dvb_teletext_idx:
* @descriptor: a %GST_MTS_DESC_DVB_TELETEXT #GstMpegtsDescriptor
* @idx: The id of the teletext to get
* @language_code: (out) (transfer full) (allow-none): a null-terminated string
* @teletext_type: (out) (allow-none): #GstMpegtsDVBTeletextType
* @magazine_number: (out) (allow-none):
* @page_number: (out) (allow-none):
*
* Parses teletext number @idx in the @descriptor. The language is in ISO639 format.
*
* Returns: FALSE on out-of-bounds and errors
*/
gboolean
gst_mpegts_descriptor_parse_dvb_teletext_idx (const GstMpegtsDescriptor *
descriptor, guint idx, gchar ** language_code,
GstMpegtsDVBTeletextType * teletext_type, guint8 * magazine_number,
guint8 * page_number)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_TELETEXT, FALSE);
if (descriptor->length / 5 <= idx)
return FALSE;
data = (guint8 *) descriptor->data + 2 + idx * 5;
if (language_code)
*language_code = convert_lang_code (data);
if (teletext_type)
*teletext_type = data[3] >> 3;
if (magazine_number)
*magazine_number = data[3] & 0x07;
if (page_number)
*page_number = data[4];
return TRUE;
}
/**
* gst_mpegts_descriptor_parse_dvb_teletext_nb:
* @descriptor: a %GST_MTS_DESC_DVB_TELETEXT #GstMpegtsDescriptor
*
* Find the number of teletext entries in @descriptor
*
* Returns: Number of teletext entries
*/
guint
gst_mpegts_descriptor_parse_dvb_teletext_nb (const GstMpegtsDescriptor *
descriptor)
{
g_return_val_if_fail (descriptor != NULL, 0);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_TELETEXT, FALSE);
return descriptor->length / 5;
}
/* GST_MTS_DESC_DVB_SUBTITLING (0x59) */
/**
* gst_mpegts_descriptor_parse_dvb_subtitling_idx:
* @descriptor: a %GST_MTS_DESC_DVB_SUBTITLING #GstMpegtsDescriptor
* @idx: Table id of the entry to parse
* @lang: (out) (transfer full): the language code
* @type: (out) (transfer none) (allow-none): the type of subtitling
* @composition_page_id: (out) (transfer none) (allow-none): the composition page id
* @ancillary_page_id: (out) (transfer none) (allow-none): the ancillary page id
*
* Extracts the DVB subtitling informatio from specific table id in @descriptor.
*
* Note: Use #gst_tag_get_language_code if you want to get the the
* ISO 639-1 language code from the returned ISO 639-2 one.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_subtitling_idx (const GstMpegtsDescriptor *
descriptor, guint idx, gchar ** lang, guint8 * type,
guint16 * composition_page_id, guint16 * ancillary_page_id)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && lang != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_SUBTITLING, FALSE);
/* If we went too far, return FALSE */
if (descriptor->length / 8 <= idx)
return FALSE;
data = (guint8 *) descriptor->data + 2 + idx * 8;
*lang = convert_lang_code (data);
data += 3;
if (type)
*type = *data;
data += 1;
if (composition_page_id)
*composition_page_id = GST_READ_UINT16_BE (data);
data += 2;
if (ancillary_page_id)
*ancillary_page_id = GST_READ_UINT16_BE (data);
return TRUE;
}
/**
* gst_mpegts_descriptor_parse_dvb_subtitling_nb:
* @descriptor: a %GST_MTS_DESC_DVB_SUBTITLING #GstMpegtsDescriptor
*
* Returns: The number of entries in @descriptor
*/
guint
gst_mpegts_descriptor_parse_dvb_subtitling_nb (const GstMpegtsDescriptor *
descriptor)
{
g_return_val_if_fail (descriptor != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_SUBTITLING, FALSE);
return descriptor->length / 8;
}
/**
* gst_mpegts_descriptor_from_dvb_subtitling:
* @lang: (transfer none): a string containing the ISO639 language
* @type: subtitling type
* @composition: composition page id
* @ancillary: ancillary page id
*/
GstMpegtsDescriptor *
gst_mpegts_descriptor_from_dvb_subtitling (const gchar * lang,
guint8 type, guint16 composition, guint16 ancillary)
{
GstMpegtsDescriptor *descriptor;
guint8 *data;
g_return_val_if_fail (lang != NULL, NULL);
descriptor = _new_descriptor (GST_MTS_DESC_DVB_SUBTITLING, 8);
data = descriptor->data + 2;
memcpy (data, lang, 3);
data += 3;
*data++ = type;
GST_WRITE_UINT16_BE (data, composition);
data += 2;
GST_WRITE_UINT16_BE (data, ancillary);
return descriptor;
}
/* GST_MTS_DESC_DVB_EXTENDED_EVENT (0x4E) */
static GstMpegtsExtendedEventDescriptor *
_gst_mpegts_extended_event_descriptor_copy (GstMpegtsExtendedEventDescriptor *
source)
{
GstMpegtsExtendedEventDescriptor *copy;
copy = g_slice_dup (GstMpegtsExtendedEventDescriptor, source);
copy->items = g_ptr_array_ref (source->items);
copy->text = g_strdup (source->text);
return copy;
}
void
gst_mpegts_extended_event_descriptor_free (GstMpegtsExtendedEventDescriptor *
source)
{
g_free (source->text);
g_free (source->language_code);
g_ptr_array_unref (source->items);
g_slice_free (GstMpegtsExtendedEventDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsExtendedEventDescriptor,
gst_mpegts_extended_event_descriptor,
(GBoxedCopyFunc) _gst_mpegts_extended_event_descriptor_copy,
(GFreeFunc) gst_mpegts_extended_event_descriptor_free);
static GstMpegtsExtendedEventItem *
_gst_mpegts_extended_event_item_copy (GstMpegtsExtendedEventItem * source)
{
GstMpegtsExtendedEventItem *copy =
g_slice_dup (GstMpegtsExtendedEventItem, source);
copy->item_description = g_strdup (source->item_description);
copy->item = g_strdup (source->item);
return copy;
}
static void
_gst_mpegts_extended_event_item_free (GstMpegtsExtendedEventItem * item)
{
g_free (item->item);
g_free (item->item_description);
g_slice_free (GstMpegtsExtendedEventItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsExtendedEventItem,
gst_mpegts_extended_event_item,
(GBoxedCopyFunc) _gst_mpegts_extended_event_item_copy,
(GFreeFunc) _gst_mpegts_extended_event_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_extended_event:
* @descriptor: a %GST_MTS_DESC_DVB_EXTENDED_EVENT #GstMpegtsDescriptor
* @res: (out) (transfer full): the #GstMpegtsExtendedEventDescriptor to fill
*
* Extracts the DVB extended event information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_extended_event (const GstMpegtsDescriptor
* descriptor, GstMpegtsExtendedEventDescriptor ** desc)
{
guint8 *data, *pdata;
guint8 tmp, len_item;
GstMpegtsExtendedEventItem *item;
GstMpegtsExtendedEventDescriptor *res;
g_return_val_if_fail (descriptor != NULL && desc != NULL, FALSE);
/* Need at least 6 bytes (1 for desc number, 3 for language code, 2 for the loop length) */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_EXTENDED_EVENT, 6, FALSE);
res = g_slice_new0 (GstMpegtsExtendedEventDescriptor);
data = (guint8 *) descriptor->data + 2;
tmp = *data;
res->descriptor_number = tmp >> 4;
res->last_descriptor_number = tmp & 0x0f;
data += 1;
res->language_code = convert_lang_code (data);
data += 3;
len_item = *data;
if (len_item > descriptor->length - 5) {
gst_mpegts_extended_event_descriptor_free (res);
return FALSE;
}
data += 1;
res->items = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_extended_event_item_free);
pdata = data + len_item;
while (data < pdata) {
item = g_slice_new0 (GstMpegtsExtendedEventItem);
item->item_description =
get_encoding_and_convert ((const gchar *) data + 1, *data);
data += *data + 1;
item->item = get_encoding_and_convert ((const gchar *) data + 1, *data);
data += *data + 1;
g_ptr_array_add (res->items, item);
}
if (pdata != data) {
gst_mpegts_extended_event_descriptor_free (res);
return FALSE;
}
res->text = get_encoding_and_convert ((const gchar *) data + 1, *data);
*desc = res;
return TRUE;
}
/* GST_MTS_DESC_DVB_COMPONENT (0x50) */
static GstMpegtsComponentDescriptor *
_gst_mpegts_dvb_component_descriptor_copy (GstMpegtsComponentDescriptor *
source)
{
GstMpegtsComponentDescriptor *copy;
copy = g_slice_dup (GstMpegtsComponentDescriptor, source);
copy->language_code = g_strdup (source->language_code);
copy->text = g_strdup (source->text);
return copy;
}
void
gst_mpegts_dvb_component_descriptor_free (GstMpegtsComponentDescriptor * source)
{
g_free (source->language_code);
g_free (source->text);
g_slice_free (GstMpegtsComponentDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsComponentDescriptor,
gst_mpegts_component_descriptor,
(GBoxedCopyFunc) _gst_mpegts_dvb_component_descriptor_copy,
(GFreeFunc) gst_mpegts_dvb_component_descriptor_free);
/**
* gst_mpegts_descriptor_parse_dvb_component:
* @descriptor: a %GST_MTS_DESC_DVB_COMPONENT #GstMpegtsDescriptor
* @res: (out) (transfer full): the #GstMpegtsComponentDescriptor to fill
*
* Extracts the DVB component information from @descriptor.
*
* Returns: %TRUE if parsing succeeded, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_component (const GstMpegtsDescriptor
* descriptor, GstMpegtsComponentDescriptor ** res)
{
guint8 *data;
guint8 len;
GstMpegtsComponentDescriptor *desc;
g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE);
/* Need 6 bytes at least (1 for content, 1 for type, 1 for tag, 3 for language code) */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_COMPONENT, 6, FALSE);
data = (guint8 *) descriptor->data + 2;
desc = g_slice_new0 (GstMpegtsComponentDescriptor);
desc->stream_content = *data & 0x0f;
data += 1;
desc->component_type = *data;
data += 1;
desc->component_tag = *data;
data += 1;
desc->language_code = convert_lang_code (data);
data += 3;
len = descriptor->length - 6;
if (len)
desc->text = get_encoding_and_convert ((const gchar *) data, len);
*res = desc;
return TRUE;
}
/* GST_MTS_DESC_DVB_STREAM_IDENTIFIER (0x52) */
/**
* gst_mpegts_descriptor_parse_dvb_stream_identifier:
* @descriptor: a %GST_MTS_DESC_DVB_CONTENT #GstMpegtsDescriptor
* @component_tag: (out) (transfer none): the component tag
*
* Extracts the component tag from @descriptor.
*
* Returns: %TRUE if the parsing happended correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_stream_identifier (const GstMpegtsDescriptor
* descriptor, guint8 * component_tag)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && component_tag != NULL, FALSE);
__common_desc_checks_exact (descriptor, GST_MTS_DESC_DVB_STREAM_IDENTIFIER,
1, FALSE);
data = (guint8 *) descriptor->data + 2;
*component_tag = *data;
return TRUE;
}
/* GST_MTS_DESC_DVB_CA_IDENTIFIER (0x53) */
/**
* gst_mpegts_descriptor_parse_dvb_ca_identifier:
* @descriptor: a %GST_MTS_DESC_DVB_CA_IDENTIFIER #GstMpegtsDescriptor
* @list: (out) (transfer full) (element-type guint16): a list of ca identifier.
* Edge entry identifies the CA system. Allocations of the value of this field
* are found in http://www.dvbservices.com
*
* Extracts ca id's from @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_ca_identifier (const GstMpegtsDescriptor *
descriptor, GArray ** list)
{
guint8 *data;
guint16 tmp;
guint i;
g_return_val_if_fail (descriptor != NULL && list != NULL, FALSE);
/* 2 bytes = one entry */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_CA_IDENTIFIER, 2, FALSE);
data = (guint8 *) descriptor->data + 2;
*list = g_array_new (FALSE, FALSE, sizeof (guint16));
for (i = 0; i < descriptor->length - 1; i += 2) {
tmp = GST_READ_UINT16_BE (data);
g_array_append_val (*list, tmp);
data += 2;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_CONTENT (0x54) */
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsContent, gst_mpegts_content);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsContent, gst_mpegts_content);
G_DEFINE_BOXED_TYPE (GstMpegtsContent,
gst_mpegts_content,
(GBoxedCopyFunc) _gst_mpegts_content_copy,
(GFreeFunc) _gst_mpegts_content_free);
/**
* gst_mpegts_descriptor_parse_dvb_content:
* @descriptor: a %GST_MTS_DESC_DVB_CONTENT #GstMpegtsDescriptor
* @content: (out) (transfer full) (element-type GstMpegtsContent): #GstMpegtsContent
*
* Extracts the DVB content information from @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_content (const GstMpegtsDescriptor
* descriptor, GPtrArray ** content)
{
guint8 *data;
guint8 len, tmp;
guint8 i;
g_return_val_if_fail (descriptor != NULL && content != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_CONTENT, FALSE);
data = (guint8 *) descriptor->data + 2;
len = descriptor->length;
*content = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_content_free);
for (i = 0; i < len;) {
GstMpegtsContent *cont = g_slice_new0 (GstMpegtsContent);
tmp = *data;
cont->content_nibble_1 = (tmp & 0xf0) >> 4;
cont->content_nibble_2 = tmp & 0x0f;
data += 1;
cont->user_byte = *data;
data += 1;
i += 2;
g_ptr_array_add (*content, cont);
}
return TRUE;
}
/* GST_MTS_DESC_DVB_PARENTAL_RATING (0x55) */
static GstMpegtsDVBParentalRatingItem *
_gst_mpegts_dvb_parental_rating_item_copy (GstMpegtsDVBParentalRatingItem *
source)
{
GstMpegtsDVBParentalRatingItem *copy =
g_slice_dup (GstMpegtsDVBParentalRatingItem, source);
copy->country_code = g_strdup (source->country_code);
return copy;
}
static void
_gst_mpegts_dvb_parental_rating_item_free (GstMpegtsDVBParentalRatingItem *
item)
{
g_free (item->country_code);
g_slice_free (GstMpegtsDVBParentalRatingItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDVBParentalRatingItem,
gst_mpegts_dvb_parental_rating_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_parental_rating_item_copy,
(GFreeFunc) _gst_mpegts_dvb_parental_rating_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_parental_rating:
* @descriptor: a %GST_MTS_DESC_DVB_PARENTAL_RATING #GstMpegtsDescriptor
* @rating: (out) (transfer full) (element-type GstMpegtsDVBParentalRatingItem):
* #GstMpegtsDVBParentalRatingItem
*
* Extracts the DVB parental rating information from @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_parental_rating (const GstMpegtsDescriptor
* descriptor, GPtrArray ** rating)
{
guint8 *data;
guint i;
g_return_val_if_fail (descriptor != NULL && rating != NULL, FALSE);
__common_desc_check_base (descriptor, GST_MTS_DESC_DVB_PARENTAL_RATING,
FALSE);
data = (guint8 *) descriptor->data + 2;
*rating = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_parental_rating_item_free);
for (i = 0; i < descriptor->length - 3; i += 4) {
GstMpegtsDVBParentalRatingItem *item =
g_slice_new0 (GstMpegtsDVBParentalRatingItem);
g_ptr_array_add (*rating, item);
item->country_code = convert_lang_code (data);
data += 3;
if (g_strcmp0 (item->country_code, "BRA") == 0) {
/* brasil */
switch (*data & 0xf) {
case 1:
item->rating = 6;
break;
case 2:
item->rating = 10;
break;
case 3:
item->rating = 12;
break;
case 4:
item->rating = 14;
break;
case 5:
item->rating = 16;
break;
case 6:
item->rating = 18;
break;
default:
item->rating = 0;
break;
}
} else {
item->rating = (*data & 0xf) + 3;
}
data += 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM (0x5A) */
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsTerrestrialDeliverySystemDescriptor,
gst_mpegts_terrestrial_delivery_system_descriptor);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsTerrestrialDeliverySystemDescriptor,
gst_mpegts_terrestrial_delivery_system_descriptor);
G_DEFINE_BOXED_TYPE (GstMpegtsTerrestrialDeliverySystemDescriptor,
gst_mpegts_terrestrial_delivery_system_descriptor,
(GBoxedCopyFunc) _gst_mpegts_terrestrial_delivery_system_descriptor_copy,
(GFreeFunc) _gst_mpegts_terrestrial_delivery_system_descriptor_free);
/**
* gst_mpegts_descriptor_parse_terrestrial_delivery_system:
* @descriptor: a %GST_MTS_DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM #GstMpegtsDescriptor
* @res: (out) (transfer none): #GstMpegtsTerrestrialDeliverySystemDescriptor
*
* Parses out the terrestrial delivery system from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_terrestrial_delivery_system (const
GstMpegtsDescriptor * descriptor,
GstMpegtsTerrestrialDeliverySystemDescriptor * res)
{
guint8 *data;
guint8 tmp;
g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE);
/* Descriptor is always 11 bytes long */
__common_desc_checks_exact (descriptor,
GST_MTS_DESC_DVB_TERRESTRIAL_DELIVERY_SYSTEM, 11, FALSE);
data = (guint8 *) descriptor->data + 2;
res->frequency = 0;
res->frequency = GST_READ_UINT32_BE (data);
res->frequency *= 10;
data += 4;
tmp = *data;
switch ((tmp >> 5) & 0x07) {
case 0:
res->bandwidth = 8000000;
break;
case 1:
res->bandwidth = 7000000;
break;
case 2:
res->bandwidth = 6000000;
break;
case 3:
res->bandwidth = 5000000;
break;
default:
res->bandwidth = 0;
break;
}
res->priority = (tmp >> 4) & 0x01;
res->time_slicing = (tmp >> 3) & 0x01;
res->mpe_fec = (tmp >> 2) & 0x01;
data += 1;
tmp = *data;
switch ((tmp >> 6) & 0x03) {
case 0:
res->constellation = GST_MPEGTS_MODULATION_QPSK;
break;
case 1:
res->constellation = GST_MPEGTS_MODULATION_QAM_16;
break;
case 2:
res->constellation = GST_MPEGTS_MODULATION_QAM_64;
break;
default:
break;
}
switch ((tmp >> 3) & 0x07) {
case 0:
res->hierarchy = GST_MPEGTS_HIERARCHY_NONE;
break;
case 1:
res->hierarchy = GST_MPEGTS_HIERARCHY_1;
break;
case 2:
res->hierarchy = GST_MPEGTS_HIERARCHY_2;
break;
case 3:
res->hierarchy = GST_MPEGTS_HIERARCHY_4;
break;
case 4:
res->hierarchy = GST_MPEGTS_HIERARCHY_NONE;
break;
case 5:
res->hierarchy = GST_MPEGTS_HIERARCHY_1;
break;
case 6:
res->hierarchy = GST_MPEGTS_HIERARCHY_2;
break;
case 7:
res->hierarchy = GST_MPEGTS_HIERARCHY_4;
break;
default:
break;
}
switch (tmp & 0x07) {
case 0:
res->code_rate_hp = GST_MPEGTS_FEC_1_2;
break;
case 1:
res->code_rate_hp = GST_MPEGTS_FEC_2_3;
break;
case 2:
res->code_rate_hp = GST_MPEGTS_FEC_3_4;
break;
case 3:
res->code_rate_hp = GST_MPEGTS_FEC_5_6;
break;
case 4:
res->code_rate_hp = GST_MPEGTS_FEC_7_8;
break;
default:
break;
}
data += 1;
tmp = *data;
switch ((tmp >> 5) & 0x07) {
case 0:
res->code_rate_lp = GST_MPEGTS_FEC_1_2;
break;
case 1:
res->code_rate_lp = GST_MPEGTS_FEC_2_3;
break;
case 2:
res->code_rate_lp = GST_MPEGTS_FEC_3_4;
break;
case 3:
res->code_rate_lp = GST_MPEGTS_FEC_5_6;
break;
case 4:
res->code_rate_lp = GST_MPEGTS_FEC_7_8;
break;
default:
break;
}
switch ((tmp >> 3) & 0x03) {
case 0:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_32;
break;
case 1:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_16;
break;
case 2:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_8;
break;
case 3:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_4;
break;
default:
break;
}
switch ((tmp >> 1) & 0x03) {
case 0:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_2K;
break;
case 1:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_8K;
break;
case 2:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_4K;
break;
default:
break;
}
res->other_frequency = tmp & 0x01;
return TRUE;
}
/* GST_MTS_DESC_DVB_MULTILINGUAL_NETWORK_NAME (0x5B) */
static GstMpegtsDvbMultilingualNetworkNameItem
* _gst_mpegts_dvb_multilingual_network_name_item_copy
(GstMpegtsDvbMultilingualNetworkNameItem * source)
{
GstMpegtsDvbMultilingualNetworkNameItem *copy =
g_slice_dup (GstMpegtsDvbMultilingualNetworkNameItem, source);
copy->language_code = g_strdup (source->language_code);
copy->network_name = g_strdup (source->network_name);
return copy;
}
static void
_gst_mpegts_dvb_multilingual_network_name_item_free
(GstMpegtsDvbMultilingualNetworkNameItem * item)
{
g_free (item->network_name);
g_free (item->language_code);
g_slice_free (GstMpegtsDvbMultilingualNetworkNameItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDvbMultilingualNetworkNameItem,
gst_mpegts_dvb_multilingual_network_name_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_multilingual_network_name_item_copy,
(GFreeFunc) _gst_mpegts_dvb_multilingual_network_name_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_multilingual_network_name:
* @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_NETWORK_NAME
* #GstMpegtsDescriptor
* @network_name_items: (out) (transfer full) (element-type GstMpegtsDvbMultilingualNetworkNameItem):
* a #GstMpegtsDvbMultilingualNetworkNameItem
*
* Parses out the multilingual network name from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_multilingual_network_name (const
GstMpegtsDescriptor * descriptor, GPtrArray ** network_name_items)
{
guint8 *data, i, len;
GstMpegtsDvbMultilingualNetworkNameItem *item;
g_return_val_if_fail (descriptor != NULL && network_name_items != NULL,
FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_MULTILINGUAL_NETWORK_NAME,
5, FALSE);
data = (guint8 *) descriptor->data + 2;
*network_name_items = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_multilingual_network_name_item_free);
for (i = 0; i < descriptor->length - 3;) {
item = g_slice_new0 (GstMpegtsDvbMultilingualNetworkNameItem);
g_ptr_array_add (*network_name_items, item);
item->language_code = convert_lang_code (data);
data += 3;
i += 3;
len = *data;
item->network_name =
get_encoding_and_convert ((const gchar *) data + 1, len);
data += len + 1;
i += len + 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_MULTILINGUAL_BOUQUET_NAME (0x5C) */
static GstMpegtsDvbMultilingualBouquetNameItem
* _gst_mpegts_dvb_multilingual_bouquet_name_item_copy
(GstMpegtsDvbMultilingualBouquetNameItem * source)
{
GstMpegtsDvbMultilingualBouquetNameItem *copy =
g_slice_dup (GstMpegtsDvbMultilingualBouquetNameItem, source);
copy->bouquet_name = g_strdup (source->bouquet_name);
copy->language_code = g_strdup (source->language_code);
return copy;
}
static void
_gst_mpegts_dvb_multilingual_bouquet_name_item_free
(GstMpegtsDvbMultilingualBouquetNameItem * item)
{
g_free (item->language_code);
g_free (item->bouquet_name);
g_slice_free (GstMpegtsDvbMultilingualBouquetNameItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDvbMultilingualBouquetNameItem,
gst_mpegts_dvb_multilingual_bouquet_name_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_multilingual_bouquet_name_item_copy,
(GFreeFunc) _gst_mpegts_dvb_multilingual_bouquet_name_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_multilingual_bouquet_name:
* @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_BOUQUET_NAME
* #GstMpegtsDescriptor
* @bouquet_name_items: (out) (transfer full) (element-type GstMpegtsDvbMultilingualBouquetNameItem):
* a #GstMpegtsDvbMultilingualBouquetNameItem
*
* Parses out the multilingual bouquet name from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_multilingual_bouquet_name (const
GstMpegtsDescriptor * descriptor, GPtrArray ** bouquet_name_items)
{
guint8 *data, i, len;
GstMpegtsDvbMultilingualBouquetNameItem *item;
g_return_val_if_fail (descriptor != NULL && bouquet_name_items != NULL,
FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_MULTILINGUAL_BOUQUET_NAME,
5, FALSE);
data = (guint8 *) descriptor->data + 2;
*bouquet_name_items = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_multilingual_bouquet_name_item_free);
for (i = 0; i < descriptor->length - 3;) {
item = g_slice_new0 (GstMpegtsDvbMultilingualBouquetNameItem);
g_ptr_array_add (*bouquet_name_items, item);
item->language_code = convert_lang_code (data);
data += 3;
i += 3;
len = *data;
item->bouquet_name =
get_encoding_and_convert ((const gchar *) data + 1, len);
data += len + 1;
i += len + 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_MULTILINGUAL_SERVICE_NAME (0x5D) */
static GstMpegtsDvbMultilingualServiceNameItem
* _gst_mpegts_dvb_multilingual_service_name_item_copy
(GstMpegtsDvbMultilingualServiceNameItem * source)
{
GstMpegtsDvbMultilingualServiceNameItem *copy =
g_slice_dup (GstMpegtsDvbMultilingualServiceNameItem, source);
copy->language_code = g_strdup (source->language_code);
copy->service_name = g_strdup (source->service_name);
copy->provider_name = g_strdup (source->provider_name);
return copy;
}
static void
_gst_mpegts_dvb_multilingual_service_name_item_free
(GstMpegtsDvbMultilingualServiceNameItem * item)
{
g_free (item->provider_name);
g_free (item->service_name);
g_free (item->language_code);
g_slice_free (GstMpegtsDvbMultilingualServiceNameItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDvbMultilingualServiceNameItem,
gst_mpegts_dvb_multilingual_service_name_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_multilingual_service_name_item_copy,
(GFreeFunc) _gst_mpegts_dvb_multilingual_service_name_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_multilingual_service_name:
* @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_SERVICE_NAME
* #GstMpegtsDescriptor
* @service_name_items: (out) (transfer full) (element-type GstMpegtsDvbMultilingualServiceNameItem):
* a #GstMpegtsDvbMultilingualServiceNameItem
*
* Parses out the multilingual service name from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_multilingual_service_name (const
GstMpegtsDescriptor * descriptor, GPtrArray ** service_name_items)
{
guint8 *data, i, len;
GstMpegtsDvbMultilingualServiceNameItem *item;
g_return_val_if_fail (descriptor != NULL && service_name_items != NULL,
FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_MULTILINGUAL_SERVICE_NAME,
7, FALSE);
data = (guint8 *) descriptor->data + 2;
*service_name_items = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_multilingual_service_name_item_free);
for (i = 0; i < descriptor->length - 3;) {
item = g_slice_new0 (GstMpegtsDvbMultilingualServiceNameItem);
g_ptr_array_add (*service_name_items, item);
item->language_code = convert_lang_code (data);
data += 3;
i += 3;
len = *data;
item->provider_name =
get_encoding_and_convert ((const gchar *) data + 1, len);
data += len + 1;
i += len + 1;
len = *data;
item->service_name =
get_encoding_and_convert ((const gchar *) data + 1, len);
data += len + 1;
i += len + 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT (0x5E) */
static GstMpegtsDvbMultilingualComponentItem
* _gst_mpegts_dvb_multilingual_component_item_copy
(GstMpegtsDvbMultilingualComponentItem * source)
{
GstMpegtsDvbMultilingualComponentItem *copy =
g_slice_dup (GstMpegtsDvbMultilingualComponentItem, source);
copy->description = g_strdup (source->description);
copy->language_code = g_strdup (source->language_code);
return copy;
}
static void
_gst_mpegts_dvb_multilingual_component_item_free
(GstMpegtsDvbMultilingualComponentItem * item)
{
g_free (item->language_code);
g_free (item->description);
g_slice_free (GstMpegtsDvbMultilingualComponentItem, item);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDvbMultilingualComponentItem,
gst_mpegts_dvb_multilingual_component_item,
(GBoxedCopyFunc) _gst_mpegts_dvb_multilingual_component_item_copy,
(GFreeFunc) _gst_mpegts_dvb_multilingual_component_item_free);
/**
* gst_mpegts_descriptor_parse_dvb_multilingual_component:
* @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT
* #GstMpegtsDescriptor
* @component_tag: (out): the component tag
* @component_description_items: (out) (transfer full) (element-type GstMpegtsDvbMultilingualComponentItem):
* a #GstMpegtsDvbMultilingualComponentItem
*
* Parses out the multilingual component from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_multilingual_component (const
GstMpegtsDescriptor * descriptor, guint8 * component_tag,
GPtrArray ** component_description_items)
{
guint8 *data, i, len;
GstMpegtsDvbMultilingualComponentItem *item;
g_return_val_if_fail (descriptor != NULL
&& component_description_items != NULL && component_tag != NULL, FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT, 6,
FALSE);
data = (guint8 *) descriptor->data + 2;
*component_tag = *data;
data += 1;
*component_description_items =
g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_dvb_multilingual_component_item_free);
for (i = 0; i < descriptor->length - 3;) {
item = g_slice_new0 (GstMpegtsDvbMultilingualComponentItem);
g_ptr_array_add (*component_description_items, item);
item->language_code = convert_lang_code (data);
data += 3;
i += 3;
len = *data;
item->description =
get_encoding_and_convert ((const gchar *) data + 1, len);
data += len + 1;
i += len + 1;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_PRIVATE_DATA_SPECIFIER (0x5F) */
/**
* gst_mpegts_descriptor_parse_dvb_private_data_specifier:
* @descriptor: a %GST_MTS_DESC_DVB_PRIVATE_DATA_SPECIFIER #GstMpegtsDescriptor
* @private_data_specifier: (out): the private data specifier id
* registered by http://www.dvbservices.com/
* @private_data: (out) (transfer full) (allow-none) (array length=length): additional data or NULL
* @length: (out) (allow-none): length of %private_data
*
* Parses out the private data specifier from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_private_data_specifier (const
GstMpegtsDescriptor * descriptor, guint32 * private_data_specifier,
guint8 ** private_data, guint8 * length)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL
&& private_data_specifier != NULL, FALSE);
__common_desc_checks (descriptor,
GST_MTS_DESC_DVB_PRIVATE_DATA_SPECIFIER, 4, FALSE);
data = (guint8 *) descriptor->data + 2;
*private_data_specifier = GST_READ_UINT32_BE (data);
if (length && private_data) {
*length = descriptor->length - 4;
*private_data = g_memdup (data + 4, *length);
}
return TRUE;
}
/* GST_MTS_DESC_DVB_FREQUENCY_LIST (0x62) */
/**
* gst_mpegts_descriptor_parse_dvb_frequency_list:
* @descriptor: a %GST_MTS_DESC_DVB_FREQUENCY_LIST #GstMpegtsDescriptor
* @offset: (out): %FALSE in Hz, %TRUE in kHz
* @list: (out) (transfer full) (element-type guint32): a list of all frequencies in Hz/kHz
* depending on %offset
*
* Parses out a list of frequencies from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_frequency_list (const GstMpegtsDescriptor
* descriptor, gboolean * offset, GArray ** list)
{
guint8 *data, type, len;
guint32 freq;
guint i;
g_return_val_if_fail (descriptor != NULL && offset != NULL &&
list != NULL, FALSE);
/* 1 byte coding system, 4 bytes each frequency entry */
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_FREQUENCY_LIST, 5, FALSE);
data = (guint8 *) descriptor->data + 2;
type = *data & 0x03;
data += 1;
if (type == 1) {
/* satellite */
*offset = TRUE;
} else {
/* cable, terrestrial */
*offset = FALSE;
}
*list = g_array_new (FALSE, FALSE, sizeof (guint32));
len = descriptor->length - 1;
for (i = 0; i < len - 3; i += 4) {
switch (type) {
case 1:
freq = BCD_32 (data) * 10;
break;
case 2:
freq = BCD_32 (data) * 100;
break;
case 3:
freq = GST_READ_UINT32_BE (data) * 10;
break;
default:
break;
}
g_array_append_val (*list, freq);
data += 4;
}
return TRUE;
}
/* GST_MTS_DESC_DVB_DATA_BROADCAST (0x64) */
static GstMpegtsDataBroadcastDescriptor *
_gst_mpegts_dvb_data_broadcast_descriptor_copy (GstMpegtsDataBroadcastDescriptor
* source)
{
GstMpegtsDataBroadcastDescriptor *copy;
copy = g_slice_dup (GstMpegtsDataBroadcastDescriptor, source);
copy->selector_bytes = g_memdup (source->selector_bytes, source->length);
copy->language_code = g_strdup (source->language_code);
copy->text = g_strdup (source->text);
return copy;
}
void
gst_mpegts_dvb_data_broadcast_descriptor_free (GstMpegtsDataBroadcastDescriptor
* source)
{
g_free (source->selector_bytes);
g_free (source->language_code);
g_free (source->text);
g_slice_free (GstMpegtsDataBroadcastDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsDataBroadcastDescriptor,
gst_mpegts_dvb_data_broadcast_descriptor,
(GBoxedCopyFunc) _gst_mpegts_dvb_data_broadcast_descriptor_copy,
(GFreeFunc) gst_mpegts_dvb_data_broadcast_descriptor_free);
/**
* gst_mpegts_descriptor_parse_dvb_data_broadcast:
* @descriptor: a %GST_MTS_DESC_DVB_DATA_BROADCAST #GstMpegtsDescriptor
* @res: (out) (transfer full): #GstMpegtsDataBroadcastDescriptor
*
* Parses out the data broadcast from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_data_broadcast (const GstMpegtsDescriptor
* descriptor, GstMpegtsDataBroadcastDescriptor ** desc)
{
guint8 *data;
GstMpegtsDataBroadcastDescriptor *res;
g_return_val_if_fail (descriptor != NULL && desc != NULL, FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_DATA_BROADCAST, 8, FALSE);
data = (guint8 *) descriptor->data + 2;
res = g_slice_new0 (GstMpegtsDataBroadcastDescriptor);
res->data_broadcast_id = GST_READ_UINT16_BE (data);
data += 2;
res->component_tag = *data;
data += 1;
res->length = *data;
data += 1;
res->selector_bytes = g_memdup (data, res->length);
data += res->length;
res->language_code = convert_lang_code (data);
data += 3;
res->text = get_encoding_and_convert ((const gchar *) data + 1, *data);
*desc = res;
return TRUE;
}
/* GST_MTS_DESC_DVB_SCRAMBLING (0x65) */
/**
* gst_mpegts_descriptor_parse_dvb_scrambling:
* @descriptor: a %GST_MTS_DESC_DVB_SCRAMBLING #GstMpegtsDescriptor
* @scrambling_mode: (out): This 8-bit field identifies the selected
* mode of the scrambling algorithm (#GstMpegtsDVBScramblingModeType).
* The technical details of the scrambling algorithm are available only
* to bona-fide users upon signature of a Non Disclosure Agreement (NDA)
* administered by the DVB Common Scrambling Algorithm Custodian.
*
* Parses out the scrambling mode from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_scrambling (const GstMpegtsDescriptor *
descriptor, GstMpegtsDVBScramblingModeType * scrambling_mode)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && scrambling_mode != NULL, FALSE);
__common_desc_checks_exact (descriptor, GST_MTS_DESC_DVB_SCRAMBLING, 1,
FALSE);
data = (guint8 *) descriptor->data + 2;
*scrambling_mode = *data;
return TRUE;
}
/* GST_MTS_DESC_DVB_DATA_BROADCAST_ID (0x66) */
/**
* gst_mpegts_descriptor_parse_dvb_data_broadcast_id:
* @descriptor: a %GST_MTS_DESC_DVB_DATA_BROADCAST_ID #GstMpegtsDescriptor
* @data_broadcast_id: (out): the data broadcast id
* @id_selector_bytes: (out) (transfer full) (array length=len): the selector bytes, if present
* @len: (out): the length of #id_selector_bytes
*
* Parses out the data broadcast id from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_data_broadcast_id (const GstMpegtsDescriptor
* descriptor, guint16 * data_broadcast_id, guint8 ** id_selector_bytes,
guint8 * len)
{
guint8 *data;
g_return_val_if_fail (descriptor != NULL && data_broadcast_id != NULL &&
id_selector_bytes != NULL, FALSE);
__common_desc_checks (descriptor, GST_MTS_DESC_DVB_DATA_BROADCAST_ID, 2,
FALSE);
data = (guint8 *) descriptor->data + 2;
*data_broadcast_id = GST_READ_UINT16_BE (data);
data += 2;
*len = descriptor->length - 2;
*id_selector_bytes = g_memdup (data, *len);
return TRUE;
}
/* GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM (0x7F && 0x04) */
static GstMpegtsT2DeliverySystemDescriptor
* _gst_mpegts_t2_delivery_system_descriptor_copy
(GstMpegtsT2DeliverySystemDescriptor * source)
{
GstMpegtsT2DeliverySystemDescriptor *copy;
copy = g_slice_dup (GstMpegtsT2DeliverySystemDescriptor, source);
copy->cells = g_ptr_array_ref (source->cells);
return copy;
}
void gst_mpegts_t2_delivery_system_descriptor_free
(GstMpegtsT2DeliverySystemDescriptor * source)
{
g_ptr_array_unref (source->cells);
g_slice_free (GstMpegtsT2DeliverySystemDescriptor, source);
}
G_DEFINE_BOXED_TYPE (GstMpegtsT2DeliverySystemDescriptor,
gst_mpegts_t2_delivery_system_descriptor,
(GBoxedCopyFunc) _gst_mpegts_t2_delivery_system_descriptor_copy,
(GFreeFunc) gst_mpegts_t2_delivery_system_descriptor_free);
DEFINE_STATIC_COPY_FUNCTION (GstMpegtsT2DeliverySystemCellExtension,
gst_mpegts_t2_delivery_system_cell_extension);
DEFINE_STATIC_FREE_FUNCTION (GstMpegtsT2DeliverySystemCellExtension,
gst_mpegts_t2_delivery_system_cell_extension);
G_DEFINE_BOXED_TYPE (GstMpegtsT2DeliverySystemCellExtension,
gst_mpegts_t2_delivery_system_cell_extension,
(GBoxedCopyFunc) _gst_mpegts_t2_delivery_system_cell_extension_copy,
(GFreeFunc) _gst_mpegts_t2_delivery_system_cell_extension_free);
static GstMpegtsT2DeliverySystemCell *
_gst_mpegts_t2_delivery_system_cell_copy (GstMpegtsT2DeliverySystemCell
* source)
{
GstMpegtsT2DeliverySystemCell *copy =
g_slice_dup (GstMpegtsT2DeliverySystemCell, source);
copy->centre_frequencies = g_array_ref (source->centre_frequencies);
copy->sub_cells = g_ptr_array_ref (source->sub_cells);
return copy;
}
static void
_gst_mpegts_t2_delivery_system_cell_free (GstMpegtsT2DeliverySystemCell * cell)
{
g_ptr_array_unref (cell->sub_cells);
g_array_unref (cell->centre_frequencies);
g_slice_free (GstMpegtsT2DeliverySystemCell, cell);
}
G_DEFINE_BOXED_TYPE (GstMpegtsT2DeliverySystemCell,
gst_mpegts_t2_delivery_system_cell,
(GBoxedCopyFunc) _gst_mpegts_t2_delivery_system_cell_copy,
(GFreeFunc) _gst_mpegts_t2_delivery_system_cell_free);
/**
* gst_mpegts_descriptor_parse_dvb_t2_delivery_system:
* @descriptor: a %GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM #GstMpegtsDescriptor
* @res: (out) (transfer full): #GstMpegtsT2DeliverySystemDescriptor
*
* Parses out the DVB-T2 delivery system from the @descriptor.
*
* Returns: %TRUE if the parsing happened correctly, else %FALSE.
*/
gboolean
gst_mpegts_descriptor_parse_dvb_t2_delivery_system (const GstMpegtsDescriptor
* descriptor, GstMpegtsT2DeliverySystemDescriptor ** desc)
{
guint8 *data;
guint8 len, freq_len, sub_cell_len;
guint32 tmp_freq;
guint8 i;
GstMpegtsT2DeliverySystemDescriptor *res;
g_return_val_if_fail (descriptor != NULL && desc != NULL, FALSE);
__common_desc_ext_checks (descriptor, GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM,
4, FALSE);
data = (guint8 *) descriptor->data + 3;
res = g_slice_new0 (GstMpegtsT2DeliverySystemDescriptor);
res->plp_id = *data;
data += 1;
res->t2_system_id = GST_READ_UINT16_BE (data);
data += 2;
if (descriptor->length > 4) {
// FIXME: siso / miso
res->siso_miso = (*data >> 6) & 0x03;
switch ((*data >> 2) & 0x0f) {
case 0:
res->bandwidth = 8000000;
break;
case 1:
res->bandwidth = 7000000;
break;
case 2:
res->bandwidth = 6000000;
break;
case 3:
res->bandwidth = 5000000;
break;
case 4:
res->bandwidth = 10000000;
break;
case 5:
res->bandwidth = 1712000;
break;
default:
res->bandwidth = 0;
break;
}
data += 1;
switch ((*data >> 5) & 0x07) {
case 0:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_32;
break;
case 1:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_16;
break;
case 2:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_8;
break;
case 3:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_4;
break;
case 4:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_128;
break;
case 5:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_19_128;
break;
case 6:
res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_19_256;
break;
default:
break;
}
switch ((*data >> 2) & 0x07) {
case 0:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_2K;
break;
case 1:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_8K;
break;
case 2:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_4K;
break;
case 3:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_1K;
break;
case 4:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_16K;
break;
case 5:
res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_32K;
break;
default:
break;
}
res->other_frequency = (*data >> 1) & 0x01;
res->tfs = (*data) & 0x01;
data += 1;
len = descriptor->length - 6;
res->cells = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_t2_delivery_system_cell_free);
for (i = 0; i < len;) {
GstMpegtsT2DeliverySystemCell *cell;
guint8 j, k;
cell = g_slice_new0 (GstMpegtsT2DeliverySystemCell);
g_ptr_array_add (res->cells, cell);
cell->cell_id = GST_READ_UINT16_BE (data);
data += 2;
i += 2;
cell->centre_frequencies = g_array_new (FALSE, FALSE, sizeof (guint32));
if (res->tfs == TRUE) {
freq_len = *data;
data += 1;
i += 1;
for (j = 0; j < freq_len;) {
tmp_freq = GST_READ_UINT32_BE (data) * 10;
g_array_append_val (cell->centre_frequencies, tmp_freq);
data += 4;
j += 4;
i += 4;
}
} else {
tmp_freq = GST_READ_UINT32_BE (data) * 10;
g_array_append_val (cell->centre_frequencies, tmp_freq);
data += 4;
i += 4;
}
sub_cell_len = (*data);
data += 1;
i += 1;
cell->sub_cells = g_ptr_array_new_with_free_func ((GDestroyNotify)
_gst_mpegts_t2_delivery_system_cell_extension_free);
for (k = 0; k < sub_cell_len;) {
GstMpegtsT2DeliverySystemCellExtension *cell_ext;
cell_ext = g_slice_new0 (GstMpegtsT2DeliverySystemCellExtension);
g_ptr_array_add (cell->sub_cells, cell_ext);
cell_ext->cell_id_extension = *data;
data += 1;
cell_ext->transposer_frequency = GST_READ_UINT32_BE (data) * 10;
data += 4;
i += 5;
k += 5;
}
}
}
*desc = res;
return TRUE;
}
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