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tsdemux: Parse Audio Preselection Descriptor
For Dolby AC4 audio experience, parsing PMTs/APD from transport stream layer for all available presentations. Refer to ETSI EN 300 468 V1.16.1 (2019-05) 1. 6.4.1 Audio preselection descriptor 2. Table M.1: Mapping of codec specific values to the audio preselection descriptor Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1555>
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yychao
GStreamer Merge Bot
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commit
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3 changed files with 216 additions and 0 deletions
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@ -2460,3 +2460,116 @@ gst_mpegts_descriptor_parse_dvb_t2_delivery_system (const GstMpegtsDescriptor
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*desc = res;
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*desc = res;
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return TRUE;
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return TRUE;
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}
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}
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/**
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* gst_mpegts_descriptor_parse_audio_selection_list:
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* @descriptor: a %GST_MTS_DESC_EXT_DVB_AUDIO_PRESELECTION #GstMpegtsDescriptor
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* @list: (out) (transfer full) (element-type GstMpegtsAudioPreselectionDescriptor):
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* the list of audio preselection
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*
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*
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* Parses out a list of audio preselection 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_audio_preselection_list (const GstMpegtsDescriptor
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* descriptor, GPtrArray ** list)
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{
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guint8 *data;
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guint8 i, num_preselections, num_aux_components, future_extension_length;
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GstMpegtsAudioPreselectionDescriptor *item;
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g_return_val_if_fail (descriptor != NULL && list != NULL, FALSE);
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__common_desc_ext_check_base (descriptor,
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GST_MTS_DESC_EXT_DVB_AUDIO_PRESELECTION, FALSE);
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*list = g_ptr_array_new_with_free_func ((GDestroyNotify)
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gst_mpegts_descriptor_parse_audio_preselection_free);
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data = (guint8 *) descriptor->data + 3;
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num_preselections = (guint8) ((*data & 0xF8) >> 3);
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data += 1;
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for (i = 0; i < num_preselections; i++) {
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item = g_slice_new0 (GstMpegtsAudioPreselectionDescriptor);
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g_ptr_array_add (*list, item);
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item->preselection_id = (*data & 0xF8) >> 3;
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item->audio_rendering_indication = *data & 0x7;
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data += 1;
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item->audio_description = (*data & 0x80) >> 7;
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item->spoken_subtitles = (*data & 0x40) >> 6;
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item->dialogue_enhancement = (*data & 0x20) >> 5;
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item->interactivity_enabled = (*data & 0x10) >> 4;
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item->language_code_present = (*data & 0x08) >> 3;
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item->text_label_present = (*data & 0x04) >> 2;
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item->multi_stream_info_present = (*data & 0x02) >> 1;
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item->future_extension = (*data) & 0x01;
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data += 1;
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if (item->language_code_present == 1) {
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item->language_code = convert_lang_code (data);
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data += 3;
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}
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if (item->text_label_present == 1) {
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item->message_id = *data;
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data += 1;
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}
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if (item->multi_stream_info_present == 1) {
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num_aux_components = (*data & 0xE0) >> 5;
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data += 1;
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for (i = 0; i < num_aux_components; i++) {
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data += 1;
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}
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}
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if (item->future_extension == 1) {
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future_extension_length = *data & 0x1F;
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data += 1;
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for (i = 0; i < future_extension_length; i++) {
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data += 1;
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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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void gst_mpegts_descriptor_parse_audio_preselection_free
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(GstMpegtsAudioPreselectionDescriptor * source)
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{
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if (source->language_code_present == 1) {
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g_free (source->language_code);
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}
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g_slice_free (GstMpegtsAudioPreselectionDescriptor, source);
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}
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void gst_mpegts_descriptor_parse_audio_preselection_dump
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(GstMpegtsAudioPreselectionDescriptor * source)
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{
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GST_DEBUG ("[Audio Preselection Descriptor]");
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GST_DEBUG (" preselection_id: 0x%02x", source->preselection_id);
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GST_DEBUG ("audio_rendering_indication: 0x%02x",
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source->audio_rendering_indication);
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GST_DEBUG (" audio_description: %d", source->audio_description);
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GST_DEBUG (" spoken_subtitles: %d", source->spoken_subtitles);
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GST_DEBUG (" dialogue_enhancement: %d", source->dialogue_enhancement);
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GST_DEBUG (" interactivity_enabled: %d", source->interactivity_enabled);
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GST_DEBUG (" language_code_present: %d", source->language_code_present);
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GST_DEBUG (" text_label_present: %d", source->text_label_present);
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GST_DEBUG (" multi_stream_info_present: %d",
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source->multi_stream_info_present);
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GST_DEBUG (" future_extension: %d", source->future_extension);
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if (source->language_code_present == 1) {
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GST_DEBUG (" language_code: %s", source->language_code);
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}
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if (source->text_label_present == 1) {
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GST_DEBUG (" message_id: 0x%02x", source->message_id);
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}
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GST_DEBUG ("-------------------------------");
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}
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@ -152,6 +152,14 @@ typedef enum {
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GST_MTS_DESC_EXT_DVB_T2MI = 0x11,
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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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GST_MTS_DESC_EXT_DVB_URI_LINKAGE = 0x13,
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GST_MTS_DESC_EXT_DVB_AC4 = 0x15,
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GST_MTS_DESC_EXT_DVB_AC4 = 0x15,
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/**
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* GST_MTS_DESC_EXT_DVB_AUDIO_PRESELECTION:
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*
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* Provide all avaliable audio programme for user selection
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*
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* Since: 1.20
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*/
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GST_MTS_DESC_EXT_DVB_AUDIO_PRESELECTION = 0x19
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} GstMpegtsDVBExtendedDescriptorType;
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} GstMpegtsDVBExtendedDescriptorType;
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/* GST_MTS_DESC_DVB_CAROUSEL_IDENTIFIER (0x13) */
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/* GST_MTS_DESC_DVB_CAROUSEL_IDENTIFIER (0x13) */
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@ -1055,6 +1063,75 @@ GST_MPEGTS_API
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gboolean gst_mpegts_descriptor_parse_dvb_t2_delivery_system (const GstMpegtsDescriptor
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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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*descriptor, GstMpegtsT2DeliverySystemDescriptor ** res);
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/**
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* GstMpegtsAudioPreselectionDescriptor:
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* @preselection_id: 5-bit
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* @audio_rendering_indication: 3-bit field
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* @audio_description: visually impaired
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* @spoken_subtitles:
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* @dialogue_enhancement:
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* @interactivity_enabled:
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* @language_code_present:
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* @text_label_present:
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* @multi_stream_info_present: indicates if this PID conveys a complete audio programme
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* @future_extension:
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* @language_code: NULL terminated ISO 639 language code.
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* @message_id:
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* @items: (element-type GstMpegtsExtendedEventItem): the #GstMpegtsExtendedEventItem
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* @text:
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*
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* Table 110: Audio Preselection Descriptor (ETSI EN 300 468 v1.16.1)
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*
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* Since: 1.20
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*/
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typedef struct _GstMpegtsAudioPreselectionDescriptor GstMpegtsAudioPreselectionDescriptor;
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struct _GstMpegtsAudioPreselectionDescriptor
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{
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guint8 preselection_id;
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guint8 audio_rendering_indication;
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gboolean audio_description;
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gboolean spoken_subtitles;
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gboolean dialogue_enhancement;
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gboolean interactivity_enabled;
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gboolean language_code_present;
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gboolean text_label_present;
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gboolean multi_stream_info_present;
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gboolean future_extension;
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gchar *language_code;
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guint8 message_id;
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};
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/**
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* gst_mpegts_descriptor_parse_audio_preselection_list:
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*
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* Since: 1.20
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*/
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GST_MPEGTS_API
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gboolean
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gst_mpegts_descriptor_parse_audio_preselection_list (const GstMpegtsDescriptor
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* descriptor, GPtrArray ** list);
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/**
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* gst_mpegts_descriptor_parse_audio_preselection_free:
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*
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* Since: 1.20
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*/
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GST_MPEGTS_API
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void
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gst_mpegts_descriptor_parse_audio_preselection_free (GstMpegtsAudioPreselectionDescriptor
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* source);
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/**
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* gst_mpegts_descriptor_parse_audio_preselection_dump:
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*
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* Since: 1.20
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*/
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GST_MPEGTS_API
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void
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gst_mpegts_descriptor_parse_audio_preselection_dump (GstMpegtsAudioPreselectionDescriptor
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* source);
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G_END_DECLS
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G_END_DECLS
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#endif /* GST_MPEGTS_DESCRIPTOR_H */
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#endif /* GST_MPEGTS_DESCRIPTOR_H */
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@ -1147,6 +1147,32 @@ gst_ts_demux_create_tags (TSDemuxStream * stream)
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g_free (lang_code);
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g_free (lang_code);
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}
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}
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}
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}
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if (bstream->stream_type == GST_MPEGTS_STREAM_TYPE_PRIVATE_PES_PACKETS) {
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desc = mpegts_get_descriptor_from_stream_with_extension (bstream,
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GST_MTS_DESC_DVB_EXTENSION, GST_MTS_DESC_EXT_DVB_AUDIO_PRESELECTION);
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if (desc) {
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GPtrArray *list;
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GstMpegtsAudioPreselectionDescriptor *item;
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if (gst_mpegts_descriptor_parse_audio_preselection_list (desc, &list)) {
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GST_DEBUG ("Found AUDIO PRESELECTION descriptor (%d entries)",
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list->len);
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for (i = 0; i < list->len; i++) {
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item = g_ptr_array_index (list, i);
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gst_mpegts_descriptor_parse_audio_preselection_dump (item);
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if (item->language_code_present) {
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add_iso639_language_to_tags (stream, item->language_code);
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break;
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}
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}
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g_ptr_array_unref (list);
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}
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}
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}
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}
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}
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static GstPad *
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static GstPad *
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