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mpegts: added metadata pointer descriptor
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6793>
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669a351c78
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2 changed files with 141 additions and 0 deletions
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@ -1477,3 +1477,67 @@ gst_buffer_add_mpegts_pes_metadata_meta (GstBuffer * buffer)
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GST_MPEGTS_PES_METADATA_META_INFO, NULL);
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return meta;
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}
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static GstMpegtsMetadataPointerDescriptor *
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_gst_mpegts_metadata_pointer_descriptor_copy (GstMpegtsMetadataPointerDescriptor
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* source)
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{
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GstMpegtsMetadataPointerDescriptor *copy =
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g_memdup2 (source, sizeof (GstMpegtsMetadataPointerDescriptor));
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return copy;
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}
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static void
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_gst_mpegts_metadata_pointer_descriptor_free (GstMpegtsMetadataPointerDescriptor
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* desc)
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{
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g_free (desc);
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}
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G_DEFINE_BOXED_TYPE (GstMpegtsMetadataPointerDescriptor,
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gst_mpegts_metadata_pointer_descriptor,
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(GBoxedCopyFunc) _gst_mpegts_metadata_pointer_descriptor_copy,
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(GFreeFunc) _gst_mpegts_metadata_pointer_descriptor_free);
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GstMpegtsDescriptor *
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gst_mpegts_descriptor_from_metadata_pointer (const
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GstMpegtsMetadataPointerDescriptor * metadata_pointer_descriptor)
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{
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g_return_val_if_fail (metadata_pointer_descriptor != NULL, NULL);
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int wr_size = 0;
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guint8 *add_info = NULL;
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GstByteWriter writer;
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// metadata_pointer_descriptor
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gst_byte_writer_init_with_size (&writer, 32, FALSE);
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gst_byte_writer_put_uint16_be (&writer,
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metadata_pointer_descriptor->metadata_application_format);
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if (metadata_pointer_descriptor->metadata_application_format ==
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GST_MPEGTS_METADATA_APPLICATION_FORMAT_IDENTIFIER_FIELD) {
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gst_byte_writer_put_uint32_be (&writer, metadata_pointer_descriptor->metadata_format_identifier); // metadata_application_format_identifier
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}
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gst_byte_writer_put_uint8 (&writer,
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metadata_pointer_descriptor->metadata_format);
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if (metadata_pointer_descriptor->metadata_format ==
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GST_MPEGTS_METADATA_FORMAT_IDENTIFIER_FIELD) {
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gst_byte_writer_put_uint32_be (&writer, metadata_pointer_descriptor->metadata_format_identifier); // metadata_format_identifier
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}
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gst_byte_writer_put_uint8 (&writer,
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metadata_pointer_descriptor->metadata_service_id);
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gst_byte_writer_put_uint8 (&writer, 0x1F); // metadata_locator_record_flag = 0, MPEG_carriage_flag = 00, reserved = 11111
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gst_byte_writer_put_uint16_be (&writer, metadata_pointer_descriptor->program_number); // program_number
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wr_size = gst_byte_writer_get_size (&writer);
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add_info = gst_byte_writer_reset_and_get_data (&writer);
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GstMpegtsDescriptor *descriptor =
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_new_descriptor (GST_MTS_DESC_METADATA_POINTER, wr_size);
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memcpy (descriptor->data + 2, add_info, wr_size);
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g_free (add_info);
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return descriptor;
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}
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@ -429,6 +429,43 @@ typedef enum
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GST_MPEGTS_METADATA_FORMAT_IDENTIFIER_FIELD = 0xff
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} GstMpegtsMetadataFormat;
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/**
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* GstMepgtsMetadataApplicationFormat:
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*
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* metadata_application_format valid values. See ISO/IEC 13818-1:2023(E) Table 2-84.
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*
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* Since: 1.26
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*/
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typedef enum
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{
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/**
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* GST_METADATA_APPLICATION_FORMAT_ISAN:
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*
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* ISO 15706-1 (ISAN) encoded in its binary form
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*
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* Since: 1.26
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*/
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GST_MPEGTS_METADATA_APPLICATION_FORMAT_ISAN = 0x0010,
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/**
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* GST_METADATA_APPLICATION_FORMAT_VSAN:
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*
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* ISO 15706-2 (V-ISAN) encoded in its binary form
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*
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* Since: 1.26
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*/
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GST_MPEGTS_METADATA_APPLICATION_FORMAT_VSAN = 0x0011,
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/**
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* GST_METADATA_APPLICATION_FORMAT_IDENTIFIER_FIELD:
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*
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* Defined by the metadata_application_format_identifier field
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*
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* Since: 1.26
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*/
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GST_MPEGTS_METADATA_APPLICATION_FORMAT_IDENTIFIER_FIELD = 0xffff,
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} GstMpegtsMetadataApplicationFormat;
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/* MPEG-TS Metadata Descriptor (0x26) */
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typedef struct _GstMpegtsMetadataDescriptor GstMpegtsMetadataDescriptor;
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@ -563,6 +600,46 @@ GST_MPEGTS_API
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GstMpegtsPESMetadataMeta *
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gst_buffer_add_mpegts_pes_metadata_meta(GstBuffer *buffer);
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/* MPEG-TS Metadata Descriptor (0x25) */
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typedef struct _GstMpegtsMetadataPointerDescriptor
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GstMpegtsMetadataPointerDescriptor;
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/**
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* GstMpegtsMetadataPointerDescriptor:
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* @metadata_application_format: specifies the application responsible for defining usage, syntax and semantics
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* @metadata_format: indicates the format and coding of the metadata
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* @metadata_format_identifier: format identifier (equivalent to registration descriptor), for example 0x4B4C4641 ('KLVA') to indicate SMPTE 336 KLV, or 0x49443320 ('ID3 ').
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* @metadata_service_id: metadata service to which this metadata descriptor applies, typically 0x00
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* @program_number: Indicates the program in which the metadata is carried.
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*
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* This structure is not complete. The following fields are missing in comparison to the standard (ISO/IEC 13818-1:2023 Section 2.6.58):
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* * metadata_locator_record_flag: hardcoded to 0. Indicating no metadata_locator_record present in the descriptor.
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* * MPEG_carriage_flags: hardcoded to 0b00, indicating the metadata is carried in the same transport steam.
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* * metadata_locator_record_length.
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* * transport_stream_location.
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* * transport_stream_id.
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*
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* See also: gst_mpegts_descriptor_from_metadata_pointer
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*
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* Since: 1.26
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*/
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struct _GstMpegtsMetadataPointerDescriptor
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{
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GstMpegtsMetadataApplicationFormat metadata_application_format;
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GstMpegtsMetadataFormat metadata_format;
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guint32 metadata_format_identifier;
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guint8 metadata_service_id;
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guint16 program_number;
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};
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#define GST_TYPE_MPEGTS_METADATA_POINTER_DESCRIPTOR \
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(gst_mpegts_metadata_pointer_descriptor_get_type())
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GST_MPEGTS_API
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GType gst_mpegts_metadata_pointer_descriptor_get_type(void);
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GST_MPEGTS_API
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GstMpegtsDescriptor *gst_mpegts_descriptor_from_metadata_pointer(const GstMpegtsMetadataPointerDescriptor *metadata_pointer_descriptor);
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G_END_DECLS
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