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mpegts: add dvb-t2 delivery system descriptor
Signed-off-by: Stefan Ringel <linuxtv@stefanringel.de> https://bugzilla.gnome.org/show_bug.cgi?id=727356
This commit is contained in:
Stefan Ringel
Edward Hervey
parent
e8c86e355f
commit
b7efacfe15
3 changed files with 307 additions and 0 deletions
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@ -1032,3 +1032,186 @@ gst_mpegts_descriptor_parse_dvb_data_broadcast (const GstMpegTsDescriptor
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return TRUE;
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}
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/* GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM (0x7F && 0x04) */
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static void
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_gst_mpegts_t2_delivery_system_cell_extension_free
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(GstMpegTsT2DeliverySystemCellExtension * ext)
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{
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g_slice_free (GstMpegTsT2DeliverySystemCellExtension, ext);
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}
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static void
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_gst_mpegts_t2_delivery_system_cell_free (GstMpegTsT2DeliverySystemCell * cell)
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{
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g_ptr_array_unref (cell->sub_cells);
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g_slice_free (GstMpegTsT2DeliverySystemCell, cell);
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}
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/**
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* gst_mpegts_descriptor_parse_dvb_t2_delivery_system:
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* @descriptor: a %GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM #GstMpegTsDescriptor
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* @res: (out) (transfer none): #GstMpegTsT2DeliverySystemDescriptor
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*
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* Parses out the DVB-T2 delivery system from the @descriptor.
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*
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* Returns: %TRUE if the parsing happened correctly, else %FALSE.
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*/
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gboolean
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gst_mpegts_descriptor_parse_dvb_t2_delivery_system (const GstMpegTsDescriptor
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* descriptor, GstMpegTsT2DeliverySystemDescriptor * res)
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{
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guint8 *data;
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guint8 len, freq_len, sub_cell_len;
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guint32 tmp_freq;
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g_return_val_if_fail (descriptor != NULL && res != NULL, FALSE);
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__common_desc_ext_checks (descriptor, GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM,
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4, FALSE);
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data = (guint8 *) descriptor->data + 3;
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res->plp_id = *data;
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data += 1;
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res->t2_system_id = GST_READ_UINT16_BE (data);
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data += 2;
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if (descriptor->length > 4) {
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// FIXME: siso / miso
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res->siso_miso = (*data >> 6) & 0x03;
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switch ((*data >> 2) & 0x0f) {
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case 0:
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res->bandwidth = 8000000;
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break;
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case 1:
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res->bandwidth = 7000000;
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break;
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case 2:
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res->bandwidth = 6000000;
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break;
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case 3:
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res->bandwidth = 5000000;
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break;
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case 4:
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res->bandwidth = 10000000;
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break;
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case 5:
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res->bandwidth = 1712000;
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break;
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default:
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res->bandwidth = 0;
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break;
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}
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data += 1;
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switch ((*data >> 5) & 0x07) {
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case 0:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_32;
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break;
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case 1:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_16;
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break;
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case 2:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_8;
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break;
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case 3:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_4;
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break;
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case 4:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_1_128;
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break;
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case 5:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_19_128;
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break;
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case 6:
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res->guard_interval = GST_MPEGTS_GUARD_INTERVAL_19_256;
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break;
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default:
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break;
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}
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switch ((*data >> 2) & 0x07) {
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case 0:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_2K;
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break;
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case 1:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_8K;
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break;
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case 2:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_4K;
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break;
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case 3:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_1K;
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break;
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case 4:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_16K;
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break;
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case 5:
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res->transmission_mode = GST_MPEGTS_TRANSMISSION_MODE_32K;
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break;
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default:
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break;
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}
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res->other_frequency = (*data >> 1) & 0x01;
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res->tfs = (*data) & 0x01;
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data += 1;
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len = descriptor->length - 6;
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res->cells = g_ptr_array_new_with_free_func ((GDestroyNotify)
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_gst_mpegts_t2_delivery_system_cell_free);
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for (guint8 i = 0; i < len;) {
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GstMpegTsT2DeliverySystemCell *cell;
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cell = g_slice_new0 (GstMpegTsT2DeliverySystemCell);
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g_ptr_array_add (res->cells, cell);
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cell->cell_id = GST_READ_UINT16_BE (data);
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data += 2;
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i += 2;
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cell->centre_frequencies = g_array_new (FALSE, FALSE, sizeof (guint32));
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if (res->tfs == TRUE) {
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freq_len = *data;
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data += 1;
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i += 1;
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for (guint8 j = 0; j < freq_len;) {
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tmp_freq = GST_READ_UINT32_BE (data) * 10;
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g_array_append_val (cell->centre_frequencies, tmp_freq);
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data += 4;
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j += 4;
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i += 4;
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}
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} else {
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tmp_freq = GST_READ_UINT32_BE (data) * 10;
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g_array_append_val (cell->centre_frequencies, tmp_freq);
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data += 4;
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i += 4;
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}
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sub_cell_len = (*data);
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data += 1;
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i += 1;
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cell->sub_cells = g_ptr_array_new_with_free_func ((GDestroyNotify)
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_gst_mpegts_t2_delivery_system_cell_extension_free);
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for (guint8 k = 0; k < sub_cell_len;) {
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GstMpegTsT2DeliverySystemCellExtension *cell_ext;
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cell_ext = g_slice_new0 (GstMpegTsT2DeliverySystemCellExtension);
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cell_ext->cell_id_extension = *data;
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data += 1;
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cell_ext->transposer_frequency = GST_READ_UINT32_BE (data) * 10;
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data += 4;
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i += 5;
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k += 5;
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}
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}
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}
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return TRUE;
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}
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@ -116,6 +116,42 @@ typedef enum {
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GST_MTS_DESC_DVB_EXTENSION = 0x7F,
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} GstMpegTsDVBDescriptorType;
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/**
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* GstMpegTsDVBExtendedDescriptorType:
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*
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* The type of #GstMpegTsDescriptor
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*
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* These values correspond to the registered extended descriptor
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* type from the various DVB specifications.
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*
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* Consult the relevant specifications for more details.
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*/
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typedef enum {
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/* 00 - 0x7F DVB extended tags ETSI EN 300 468
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* (Specification for Service Information (SI) in DVB systems)
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*/
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GST_MTS_DESC_EXT_DVB_IMAGE_ICON = 0x00,
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/* TS/TR 102 825 */
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GST_MTS_DESC_EXT_DVB_CPCM_DELIVERY_SIGNALLING = 0x01,
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GST_MTS_DESC_EXT_DVB_CP = 0x02,
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GST_MTS_DESC_EXT_DVB_CP_IDENTIFIER = 0x03,
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GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM = 0x04,
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GST_MTS_DESC_EXT_DVB_SH_DELIVERY_SYSTEM = 0x05,
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GST_MTS_DESC_EXT_DVB_SUPPLEMENTARY_AUDIO = 0x06,
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GST_MTS_DESC_EXT_DVB_NETWORK_CHANGE_NOTIFY = 0x07,
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GST_MTS_DESC_EXT_DVB_MESSAGE = 0x08,
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GST_MTS_DESC_EXT_DVB_TARGET_REGION = 0x09,
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GST_MTS_DESC_EXT_DVB_TARGET_REGION_NAME = 0x0A,
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GST_MTS_DESC_EXT_DVB_SERVICE_RELOCATED = 0x0B,
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GST_MTS_DESC_EXT_DVB_XAIT_PID = 0x0C,
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GST_MTS_DESC_EXT_DVB_C2_DELIVERY_SYSTEM = 0x0D,
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GST_MTS_DESC_EXT_DVB_DTS_HD_AUDIO_STREAM = 0x0E,
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GST_MTS_DESC_EXT_DVB_DTS_NEUTRAL = 0x0F,
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GST_MTS_DESC_EXT_DVB_VIDEO_DEPTH_RANGE = 0x10,
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GST_MTS_DESC_EXT_DVB_T2MI = 0x11,
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GST_MTS_DESC_EXT_DVB_URI_LINKAGE = 0x13,
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} GstMpegTsDVBExtendedDescriptorType;
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/* GST_MTS_DESC_DVB_CAROUSEL_IDENTIFIER (0x13) */
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/* FIXME : Implement */
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@ -508,6 +544,68 @@ gboolean gst_mpegts_descriptor_parse_dvb_data_broadcast (const GstMpegTsDescript
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/* GST_MTS_DESC_DVB_AC3 (0x6a) */
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/* FIXME : Implement */
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/* GST_MTS_DESC_EXT_DVB_T2_DELIVERY_SYSTEM (0x7F && 0x04) */
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typedef struct _GstMpegTsT2DeliverySystemCellExtension GstMpegTsT2DeliverySystemCellExtension;
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/**
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* GstMpegTsT2DeliverySystemCellExtension:
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* @cell_id_extension: id of the sub cell
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* @transposer_frequency: centre frequency of the sub cell in Hz
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*/
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struct _GstMpegTsT2DeliverySystemCellExtension
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{
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guint8 cell_id_extension;
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guint32 transposer_frequency;
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};
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typedef struct _GstMpegTsT2DeliverySystemCell GstMpegTsT2DeliverySystemCell;
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/**
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* GstMpegTsT2DeliverySystemCell:
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* @cell_id: id of the cell
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* @centre_frequencies: centre frequencies in Hz
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* @sub_cells: (element-type GstMpegTsT2DeliverySystemCellExtension):
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*/
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struct _GstMpegTsT2DeliverySystemCell
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{
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guint16 cell_id;
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GArray *centre_frequencies;
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GPtrArray *sub_cells;
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};
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typedef struct _GstMpegTsT2DeliverySystemDescriptor GstMpegTsT2DeliverySystemDescriptor;
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/**
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* GstMpegTsT2DeliverySystemDescriptor:
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* @plp_id:
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* @t2_system_id:
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* @siso_miso:
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* @bandwidth:
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* @guard_interval:
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* @transmission_mode:
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* @other_frequency:
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* @tfs:
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* @cells: (element-type GstMpegTsT2DeliverySystemCell):
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*
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* describe DVB-T2 transmissions according to EN 302 755
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*/
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struct _GstMpegTsT2DeliverySystemDescriptor
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{
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guint8 plp_id;
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guint16 t2_system_id;
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/* FIXME: */
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guint8 siso_miso;
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guint32 bandwidth;
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GstMpegTsTerrestrialGuardInterval guard_interval;
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GstMpegTsTerrestrialTransmissionMode transmission_mode;
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gboolean other_frequency;
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gboolean tfs;
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GPtrArray *cells;
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};
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gboolean gst_mpegts_descriptor_parse_dvb_t2_delivery_system (const GstMpegTsDescriptor
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*descriptor, GstMpegTsT2DeliverySystemDescriptor * res);
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G_END_DECLS
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#endif /* GST_MPEGTS_DESCRIPTOR_H */
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@ -74,6 +74,32 @@ G_GNUC_INTERNAL gpointer __common_section_checks (GstMpegTsSection *section,
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return retval; \
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}
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#define __common_desc_ext_check_base(desc, tagexttype, retval) \
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if (G_UNLIKELY ((desc)->data == NULL)) { \
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GST_WARNING ("Descriptor is empty (data field == NULL)"); \
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return retval; \
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} \
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if (G_UNLIKELY ((desc)->tag != 0x7f) || \
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((desc)->tag_extension != (tagexttype))) { \
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GST_WARNING ("Wrong descriptor type (Got 0x%02x, expected 0x%02x)", \
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(desc)->tag_extension, tagexttype); \
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return retval; \
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}
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#define __common_desc_ext_checks(desc, tagexttype, minlen, retval) \
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__common_desc_ext_check_base(desc, tagexttype, retval); \
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if (G_UNLIKELY ((desc)->length < (minlen))) { \
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GST_WARNING ("Descriptor too small (Got %d, expected at least %d)", \
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(desc)->length, minlen); \
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return retval; \
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}
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#define __common_desc_ext_checks_exact(desc, tagexttype, len, retval) \
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__common_desc_ext_check_base(desc, tagexttype, retval); \
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if (G_UNLIKELY ((desc)->length != (len))) { \
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GST_WARNING ("Wrong descriptor size (Got %d, expected %d)", \
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(desc)->length, len); \
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return retval; \
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}
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G_END_DECLS
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#endif /* _GST_MPEGTS_PRIVATE_H_ */
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