/* * gstmpegtsdescriptor.c - * Copyright (C) 2013 Edward Hervey * * Authors: * Edward Hervey * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #include #include #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])) /* 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 * * Fills 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); g_return_val_if_fail (size < 256, 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) */ static void _gst_mpegts_dvb_service_list_item_free (GstMpegTsDVBServiceListItem * item) { g_slice_free (GstMpegTsDVBServiceListItem, item); } /** * 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): 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_checks (descriptor, GST_MTS_DESC_DVB_STUFFING, 0, FALSE); data = (guint8 *) descriptor->data + 2; *stuffing_bytes = g_memdup (data, descriptor->length); return TRUE; } /* GST_MTS_DESC_DVB_SATELLITE_DELIVERY_SYSTEM (0x43) */ /** * 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) */ /** * 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 #GstMpgTsDescriptor or %NULL on fail */ GstMpegTsDescriptor * gst_mpegts_descriptor_from_dvb_service (GstMpegTsDVBServiceType service_type, const gchar * service_name, const gchar * service_provider) { GstMpegTsDescriptor *descriptor; 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); return NULL; } } if (provider_size >= 256) { g_free (conv_provider_name); g_return_val_if_reached (NULL); } 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); return NULL; } } if (service_size >= 256) { g_free (conv_provider_name); g_free (conv_service_name); g_return_val_if_reached (NULL); } descriptor = _new_descriptor (GST_MTS_DESC_DVB_SERVICE, 3 + provider_size + service_size); data = descriptor->data + 2; *data++ = service_type; *data++ = provider_size; memcpy (data, conv_provider_name, provider_size); data += provider_size; *data++ = service_size; memcpy (data, conv_service_name, service_size); g_free (conv_provider_name); g_free (conv_service_name); return descriptor; } /* GST_MTS_DESC_DVB_LINKAGE (0x4A) */ static void _gst_mpegts_dvb_linkage_extened_event_free (GstMpegTsDVBLinkageExtendedEvent * item) { g_slice_free (GstMpegTsDVBLinkageExtendedEvent, item); } /** * gst_mpegts_descriptor_parse_dvb_linkage: * @descriptor: a %GST_MTS_DESC_DVB_LINKAGE #GstMpegTsDescriptor * @res: (out) (transfer none): 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 * res) { guint8 *data, *end; g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE); __common_desc_checks (descriptor, GST_MTS_DESC_DVB_LINKAGE, 7, FALSE); data = (guint8 *) descriptor->data + 2; end = data + descriptor->length; 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) return FALSE; 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) { g_slice_free (GstMpegTsDVBLinkageMobileHandOver, hand_over); res->linkage_data = NULL; return FALSE; } hand_over->network_id = GST_READ_UINT16_BE (data); data += 2; } if (hand_over->origin_type == 0) { if (end - data < 2) { g_slice_free (GstMpegTsDVBLinkageMobileHandOver, hand_over); res->linkage_data = NULL; return FALSE; } 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) return FALSE; 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_extened_event_free); res->linkage_data = (gpointer) ext_events; for (guint8 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); return TRUE; fail: g_ptr_array_unref (res->linkage_data); res->linkage_data = NULL; return FALSE; } /* 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 = g_malloc0 (4); memcpy (*language_code, data, 3); } 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) (allow-none): a 4-byte gchar array to hold language * @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)[4], GstMpegTsDVBTeletextType * teletext_type, guint8 * magazine_number, guint8 * page_number) { guint8 *data; g_return_val_if_fail (descriptor != NULL, FALSE); __common_desc_checks (descriptor, GST_MTS_DESC_DVB_TELETEXT, 0, FALSE); if (descriptor->length / 5 <= idx) return FALSE; data = (guint8 *) descriptor->data + 2 + idx * 5; if (language_code) { memcpy (language_code, data, 3); (*language_code)[3] = 0; } 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_checks (descriptor, GST_MTS_DESC_DVB_TELETEXT, 0, 0); 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 none): 4-byte gchar array to hold 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)[4], guint8 * type, guint16 * composition_page_id, guint16 * ancillary_page_id) { guint8 *data; g_return_val_if_fail (descriptor != NULL && lang != NULL, FALSE); __common_desc_checks (descriptor, GST_MTS_DESC_DVB_SUBTITLING, 0, FALSE); /* If we went too far, return FALSE */ if (descriptor->length / 8 <= idx) return FALSE; data = (guint8 *) descriptor->data + 2 + idx * 8; memcpy (lang, data, 3); (*lang)[3] = 0; 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_checks (descriptor, GST_MTS_DESC_DVB_SUBTITLING, 0, 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 void _gst_mpegts_extended_event_item_free (GstMpegTsExtendedEventItem * item) { g_slice_free (GstMpegTsExtendedEventItem, item); } /** * gst_mpegts_descriptor_parse_dvb_extended_event: * @descriptor: a %GST_MTS_DESC_DVB_EXTENDED_EVENT #GstMpegTsDescriptor * @res: (out) (transfer none): 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 * res) { guint8 *data, *pdata; guint8 tmp, len_item; GstMpegTsExtendedEventItem *item; g_return_val_if_fail (descriptor != NULL && res != 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); data = (guint8 *) descriptor->data + 2; tmp = *data; res->descriptor_number = tmp >> 4; res->last_descriptor_number = tmp & 0x0f; data += 1; memcpy (res->language_code, data, 3); res->language_code[3] = 0; data += 3; len_item = *data; if (len_item > descriptor->length - 5) 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) return FALSE; res->text = get_encoding_and_convert ((const gchar *) data + 1, *data); return TRUE; } /* GST_MTS_DESC_DVB_COMPONENT (0x50) */ /** * gst_mpegts_descriptor_parse_dvb_component: * @descriptor: a %GST_MTS_DESC_DVB_COMPONENT #GstMpegTsDescriptor * @res: (out) (transfer none): 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; 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; res->stream_content = *data & 0x0f; data += 1; res->component_type = *data; data += 1; res->component_tag = *data; data += 1; memcpy (res->language_code, data, 3); res->language_code[3] = 0; data += 3; len = descriptor->length - 6; if (len) res->text = get_encoding_and_convert ((const gchar *) data, len); 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 none) (element-type guint16): This 16-bit field * 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; 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 (guint 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) */ static void _gst_mpegts_content_free (GstMpegTsContent * content) { g_slice_free (GstMpegTsContent, content); } /** * gst_mpegts_descriptor_parse_dvb_content: * @descriptor: a %GST_MTS_DESC_DVB_CONTENT #GstMpegTsDescriptor * @content: (out) (transfer none) (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_checks (descriptor, GST_MTS_DESC_DVB_CONTENT, 0, 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 void _gst_mpegts_dvb_parental_rating_item_free (GstMpegTsDVBParentalRatingItem * item) { g_slice_free (GstMpegTsDVBParentalRatingItem, item); } /** * gst_mpegts_descriptor_parse_dvb_parental_rating: * @descriptor: a %GST_MTS_DESC_DVB_PARENTAL_RATING #GstMpegTsDescriptor * @rating: (out) (transfer none) (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; g_return_val_if_fail (descriptor != NULL && rating != NULL, FALSE); __common_desc_checks (descriptor, GST_MTS_DESC_DVB_PARENTAL_RATING, 0, FALSE); data = (guint8 *) descriptor->data + 2; *rating = g_ptr_array_new_with_free_func ((GDestroyNotify) _gst_mpegts_dvb_parental_rating_item_free); for (guint8 i = 0; i < descriptor->length - 3; i += 4) { GstMpegTsDVBParentalRatingItem *item = g_slice_new0 (GstMpegTsDVBParentalRatingItem); g_ptr_array_add (*rating, item); memcpy (item->country_code, data, 3); item->country_code[3] = 0; 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) */ /** * 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 void _gst_mpegts_dvb_multilingual_network_name_item_free (GstMpegTsDvbMultilingualNetworkNameItem * item) { g_slice_free (GstMpegTsDvbMultilingualNetworkNameItem, item); } /** * gst_mpegts_descriptor_parse_dvb_multilingual_network_name: * @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_NETWORK_NAME * #GstMpegTsDescriptor * @network_name_items: (out) (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); memcpy (item->language_code, data, 3); 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 void _gst_mpegts_dvb_multilingual_bouquet_name_item_free (GstMpegTsDvbMultilingualBouquetNameItem * item) { g_slice_free (GstMpegTsDvbMultilingualBouquetNameItem, item); } /** * gst_mpegts_descriptor_parse_dvb_multilingual_bouquet_name: * @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_BOUQUET_NAME * #GstMpegTsDescriptor * @bouquet_name_items: (out) (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); memcpy (item->language_code, data, 3); 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 void _gst_mpegts_dvb_multilingual_service_name_item_free (GstMpegTsDvbMultilingualServiceNameItem * item) { g_slice_free (GstMpegTsDvbMultilingualServiceNameItem, item); } /** * gst_mpegts_descriptor_parse_dvb_multilingual_service_name: * @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_SERVICE_NAME * #GstMpegTsDescriptor * @service_name_items: (out) (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); memcpy (item->language_code, data, 3); 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 void _gst_mpegts_dvb_multilingual_component_item_free (GstMpegTsDvbMultilingualComponentItem * item) { g_slice_free (GstMpegTsDvbMultilingualComponentItem, item); } /** * gst_mpegts_descriptor_parse_dvb_multilingual_component: * @descriptor: a %GST_MTS_DESC_DVB_MULTILINGUAL_COMPONENT * #GstMpegTsDescriptor * @component_tag: the component tag * @component_description_items: (out) (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); memcpy (item->language_code, data, 3); 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) (allow-none): 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) (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; 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 (guint8 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) */ /** * gst_mpegts_descriptor_parse_dvb_data_broadcast: * @descriptor: a %GST_MTS_DESC_DVB_DATA_BROADCAST #GstMpegTsDescriptor * @res: (out) (transfer none): #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 * res) { guint8 *data; guint8 len; g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE); __common_desc_checks (descriptor, GST_MTS_DESC_DVB_DATA_BROADCAST, 8, FALSE); data = (guint8 *) descriptor->data + 2; res->data_broadcast_id = GST_READ_UINT16_BE (data); data += 2; res->component_tag = *data; data += 1; len = *data; data += 1; res->selector_bytes = g_memdup (data, len); data += len; memcpy (res->language_code, data, 3); data += 3; res->text = get_encoding_and_convert ((const gchar *) data + 1, *data); 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): 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 void _gst_mpegts_t2_delivery_system_cell_extension_free (GstMpegTsT2DeliverySystemCellExtension * ext) { g_slice_free (GstMpegTsT2DeliverySystemCellExtension, ext); } static void _gst_mpegts_t2_delivery_system_cell_free (GstMpegTsT2DeliverySystemCell * cell) { g_ptr_array_unref (cell->sub_cells); g_slice_free (GstMpegTsT2DeliverySystemCell, cell); } /** * gst_mpegts_descriptor_parse_dvb_t2_delivery_system: * @descriptor: a %GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM #GstMpegTsDescriptor * @res: (out) (transfer none): #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 * res) { guint8 *data; guint8 len, freq_len, sub_cell_len; guint32 tmp_freq; guint8 i; g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE); __common_desc_ext_checks (descriptor, GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM, 4, FALSE); data = (guint8 *) descriptor->data + 3; 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; } } } return TRUE; }