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649 lines
23 KiB
C
649 lines
23 KiB
C
/* GStreamer
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* Copyright (C) <2018> Edward Hervey <edward@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_VIDEO_ANC_H__
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#define __GST_VIDEO_ANC_H__
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#include <gst/gst.h>
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#include <gst/video/video-format.h>
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#include <gst/video/video-info.h>
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G_BEGIN_DECLS
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typedef struct _GstVideoAncillary GstVideoAncillary;
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/**
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* GstVideoAncillary:
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* @DID: The Data Identifier
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* @SDID_block_number: The Secondary Data Identifier (if type 2) or the Data
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* Block Number (if type 1)
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* @data_count: The amount of data (in bytes) in @data (max 255 bytes)
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* @data: (array length=data_count): The user data content of the Ancillary packet.
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* Does not contain the ADF, DID, SDID nor CS.
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*
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* Video Ancillary data, according to SMPTE-291M specification.
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*
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* Note that the contents of the data are always stored as 8bit data (i.e. do not contain
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* the parity check bits).
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*
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* Since: 1.16
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*/
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struct _GstVideoAncillary {
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guint8 DID;
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guint8 SDID_block_number;
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guint8 data_count;
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guint8 data[256];
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/*< private >*/
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/* Padding for future extension */
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gpointer _gst_reserved[GST_PADDING];
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};
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/**
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* GstVideoAncillaryDID:
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*
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* Since: 1.16
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*/
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typedef enum {
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GST_VIDEO_ANCILLARY_DID_UNDEFINED = 0x00,
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GST_VIDEO_ANCILLARY_DID_DELETION = 0x80,
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GST_VIDEO_ANCILLARY_DID_HANC_3G_AUDIO_DATA_FIRST = 0xa0,
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GST_VIDEO_ANCILLARY_DID_HANC_3G_AUDIO_DATA_LAST = 0xa7,
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GST_VIDEO_ANCILLARY_DID_HANC_HDTV_AUDIO_DATA_FIRST = 0xe0,
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GST_VIDEO_ANCILLARY_DID_HANC_HDTV_AUDIO_DATA_LAST = 0xe7,
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GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_1_FIRST = 0xec,
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GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_1_LAST = 0xef,
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GST_VIDEO_ANCILLARY_DID_CAMERA_POSITION = 0xf0,
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GST_VIDEO_ANCILLARY_DID_HANC_ERROR_DETECTION = 0xf4,
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GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_2_FIRST = 0xf8,
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GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_2_LAST = 0xff,
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} GstVideoAncillaryDID;
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/**
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* GST_VIDEO_ANCILLARY_DID16:
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* @anc: a #GstVideoAncillary
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*
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* Returns the #GstVideoAncillaryDID16 of the ancillary data.
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*
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* Since: 1.16
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*
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* Returns: a #GstVideoAncillaryDID16 identifier
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*/
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#define GST_VIDEO_ANCILLARY_DID16(anc) ((guint16)((anc)->DID) << 8 | (guint16)((anc)->SDID_block_number))
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/**
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* GstVideoAncillaryDID16:
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* @GST_VIDEO_ANCILLARY_DID16_S334_EIA_708: CEA 708 Ancillary data according to SMPTE 334
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* @GST_VIDEO_ANCILLARY_DID16_S334_EIA_608: CEA 608 Ancillary data according to SMPTE 334
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* @GST_VIDEO_ANCILLARY_DID16_S2016_3_AFD_BAR: AFD/Bar Ancillary data according to SMPTE 2016-3 (Since: 1.18)
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*
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* Some know types of Ancillary Data identifiers.
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*
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* Since: 1.16
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*/
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typedef enum {
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GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 = 0x6101,
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GST_VIDEO_ANCILLARY_DID16_S334_EIA_608 = 0x6102,
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GST_VIDEO_ANCILLARY_DID16_S2016_3_AFD_BAR = 0x4105,
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} GstVideoAncillaryDID16;
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/**
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* GstAncillaryMetaField:
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* @GST_ANCILLARY_META_FIELD_PROGRESSIVE: Progressive or no field specified (default)
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* @GST_ANCILLARY_META_FIELD_INTERLACED_FIRST: Interlaced first field
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* @GST_ANCILLARY_META_FIELD_INTERLACED_SECOND: Interlaced second field
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*
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* Location of a @GstAncillaryMeta.
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*
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* Since: 1.24
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*/
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typedef enum {
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GST_ANCILLARY_META_FIELD_PROGRESSIVE = 0x00,
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GST_ANCILLARY_META_FIELD_INTERLACED_FIRST = 0x10,
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GST_ANCILLARY_META_FIELD_INTERLACED_SECOND = 0x11,
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} GstAncillaryMetaField;
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/**
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* GstAncillaryMeta:
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* @meta: Parent #GstMeta
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* @field: The field where the ancillary data is located
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* @c_not_y_channel: Which channel (luminance or chrominance) the ancillary
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* data is located. 0 if content is SD or stored in the luminance channel
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* (default). 1 if HD and stored in the chrominance channel.
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* @line: The line on which the ancillary data is located (max 11bit). There
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* are two special values: 0x7ff if no line is specified (default), 0x7fe
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* to specify the ancillary data is on any valid line before active video
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* @offset: The location of the ancillary data packet in a SDI raster relative
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* to the start of active video (max 12bits). A value of 0 means the ADF of
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* the ancillary packet starts immediately following SAV. There are 3
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* special values: 0xfff: No specified location (default), 0xffe: within
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* HANC data space, 0xffd: within the ancillary data space located between
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* SAV and EAV
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* @DID: Data Identified
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* @SDID_block_number: Secondary Data identification (if type 2) or Data block
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* number (if type 1)
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* @data_count: The amount of user data
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* @data: The User data
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* @checksum: The checksum of the ADF
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*
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* #GstMeta for carrying SMPTE-291M Ancillary data. Note that all the ADF fields
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* (@DID to @checksum) are 10bit values with parity/non-parity high-bits set.
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*
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* Since: 1.24
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*/
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typedef struct {
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GstMeta meta;
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GstAncillaryMetaField field; /* Field location */
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gboolean c_not_y_channel; /* 1 if content is HD and the ANC data is stored
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in the chrominance channel. 0 if content is
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SD or the ANC data is stored in the luminance
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channel (default) */
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guint16 line; /* The line on which this ANC data is located.
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*
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* 11bit value
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*
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* Special values:
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* * 0x7ff : No line specified (default)
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* * 0x7fe : Any valid line before active video */
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guint16 offset; /* Location of the ANC data packet in a SDI
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* raster relative to SAV. A value of 0 means
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* the ADF of the ANC data packet beings
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* immediately following SAV.
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*
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* 12bits value
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*
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* The unit is 10-bit words of the indicated
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* data stream and data channel
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*
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* Special values:
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* * 0xfff: No specified horizontal location (default)
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* * 0xffe: Within HANC data space
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* * 0xffd: Within the ancillary data space located
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* between SAV and EAV
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*/
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/* EXCLUDED from ANC RTP are the multi-stream properties (ex: stereoscopic
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* video). That information should be conveyed by having separate VANC
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* streams */
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/* What follows are all the fields making up a ST 291 ADF packet. All of the
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* fields are stored as 10bit, including the parity/non-parity high-bits set.
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*
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* To access the 8bit content, just cast the value */
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guint16 DID; /* Data Identifier (10 bit) */
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guint16 SDID_block_number; /* Secondary data identification (If type 2) or
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* Data Block number (if type 1). Value is
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* 10bit */
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guint16 data_count; /* The amount of User Data. Only the low 8 bits are to be used */
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guint16 *data; /* The User Data (10bit) */
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guint16 checksum; /* The checksum (10bit) */
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} GstAncillaryMeta;
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GST_VIDEO_API GType gst_ancillary_meta_api_get_type(void);
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#define GST_ANCILLARY_META_API_TYPE (gst_ancillary_meta_api_get_type())
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GST_VIDEO_API const GstMetaInfo *gst_ancillary_meta_get_info(void);
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#define GST_ANCILLARY_META_INFO (gst_ancillary_meta_get_info())
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GST_VIDEO_API GstAncillaryMeta *
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gst_buffer_add_ancillary_meta(GstBuffer *buffer);
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/**
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* gst_buffer_get_ancillary_meta:
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* @b: A #GstBuffer
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*
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* Gets the #GstAncillaryMeta that might be present on @b.
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*
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* Note: It is quite likely that there might be more than one ancillary meta on
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* a given buffer. This function will only return the first one. See gst_buffer_iterate_ancillary_meta() for a way to iterate over all ancillary metas of the buffer.
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*
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* Since: 1.24
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*
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* Returns: The first #GstAncillaryMeta present on @b, or %NULL if none are
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* present.
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*/
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#define gst_buffer_get_ancillary_meta(b) \
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((GstAncillaryMeta*)gst_buffer_get_meta((b), GST_ANCILLARY_META_API_TYPE)
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/**
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* gst_buffer_iterate_ancillary_meta:
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* @b: A #GstBuffer
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* @s: (out caller-allocates): An opaque state pointer
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*
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* Retrieves the next #GstAncillaryMeta after the current one according to
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* @s. If @s points to %NULL, the first #GstAncillaryMeta will be returned (if
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* any).
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*
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* @s will be updated with an opaque state pointer.
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*
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* Since: 1.24
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*
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* Returns: (transfer none) (nullable): The next #GstAncillaryMeta present on @b
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* or %NULL when there are no more items.
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*/
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#define gst_buffer_iterate_ancillary_meta(b, s) \
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((GstAncillaryMeta*)gst_buffer_iterate_meta_filtered((b), (s), GST_ANCILLARY_META_API_TYPE))
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/**
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* GstVideoAFDValue:
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* @GST_VIDEO_AFD_UNAVAILABLE: Unavailable (see note 0 below).
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* @GST_VIDEO_AFD_16_9_TOP_ALIGNED: For 4:3 coded frame, letterbox 16:9 image,
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* at top of the coded frame. For 16:9 coded frame, full frame 16:9 image,
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* the same as the coded frame.
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* @GST_VIDEO_AFD_14_9_TOP_ALIGNED: For 4:3 coded frame, letterbox 14:9 image,
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* at top of the coded frame. For 16:9 coded frame, pillarbox 14:9 image,
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* horizontally centered in the coded frame.
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* @GST_VIDEO_AFD_GREATER_THAN_16_9: For 4:3 coded frame, letterbox image with an aspect ratio
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* greater than 16:9, vertically centered in the coded frame. For 16:9 coded frame,
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* letterbox image with an aspect ratio greater than 16:9.
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* @GST_VIDEO_AFD_4_3_FULL_16_9_FULL: For 4:3 coded frame, full frame 4:3 image,
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* the same as the coded frame. For 16:9 coded frame, full frame 16:9 image, the same as
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* the coded frame.
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* @GST_VIDEO_AFD_4_3_FULL_4_3_PILLAR: For 4:3 coded frame, full frame 4:3 image, the same as
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* the coded frame. For 16:9 coded frame, pillarbox 4:3 image, horizontally centered in the
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* coded frame.
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* @GST_VIDEO_AFD_16_9_LETTER_16_9_FULL: For 4:3 coded frame, letterbox 16:9 image, vertically centered in
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* the coded frame with all image areas protected. For 16:9 coded frame, full frame 16:9 image,
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* with all image areas protected.
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* @GST_VIDEO_AFD_14_9_LETTER_14_9_PILLAR: For 4:3 coded frame, letterbox 14:9 image, vertically centered in
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* the coded frame. For 16:9 coded frame, pillarbox 14:9 image, horizontally centered in the
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* coded frame.
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* @GST_VIDEO_AFD_4_3_FULL_14_9_CENTER: For 4:3 coded frame, full frame 4:3 image, with alternative 14:9
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* center. For 16:9 coded frame, pillarbox 4:3 image, with alternative 14:9 center.
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* @GST_VIDEO_AFD_16_9_LETTER_14_9_CENTER: For 4:3 coded frame, letterbox 16:9 image, with alternative 14:9
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* center. For 16:9 coded frame, full frame 16:9 image, with alternative 14:9 center.
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* @GST_VIDEO_AFD_16_9_LETTER_4_3_CENTER: For 4:3 coded frame, letterbox 16:9 image, with alternative 4:3
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* center. For 16:9 coded frame, full frame 16:9 image, with alternative 4:3 center.
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*
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* Enumeration of the various values for Active Format Description (AFD)
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*
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* AFD should be included in video user data whenever the rectangular
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* picture area containing useful information does not extend to the full height or width of the coded
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* frame. AFD data may also be included in user data when the rectangular picture area containing
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* useful information extends to the full height and width of the coded frame.
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*
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* For details, see Table 6.14 Active Format in:
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*
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* ATSC Digital Television Standard:
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* Part 4 – MPEG-2 Video System Characteristics
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* and Active Format Description in Complete list of AFD codes
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*
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* https://en.wikipedia.org/wiki/Active_Format_Description#Complete_list_of_AFD_codes
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*
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* and SMPTE ST2016-1
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*
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* Notes:
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*
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* 1) AFD 0 is undefined for ATSC and SMPTE ST2016-1, indicating that AFD data is not available:
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* If Bar Data is not present, AFD '0000' indicates that exact information
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* is not available and the active image should be assumed to be the same as the coded frame. AFD '0000'.
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* AFD '0000' accompanied by Bar Data signals that the active image’s aspect ratio is narrower than 16:9,
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* but is not 4:3 or 14:9. As the exact aspect ratio cannot be conveyed by AFD alone, wherever possible,
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* AFD ‘0000’ should be accompanied by Bar Data to define the exact vertical or horizontal extent
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* of the active image.
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* 2) AFD 0 is reserved for DVB/ETSI
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* 3) values 1, 5, 6, 7, and 12 are reserved for both ATSC and DVB/ETSI
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* 4) values 2 and 3 are not recommended for ATSC, but are valid for DVB/ETSI
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*
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* Since: 1.18
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*/
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typedef enum {
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GST_VIDEO_AFD_UNAVAILABLE = 0,
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GST_VIDEO_AFD_16_9_TOP_ALIGNED = 2,
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GST_VIDEO_AFD_14_9_TOP_ALIGNED = 3,
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GST_VIDEO_AFD_GREATER_THAN_16_9 = 4,
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GST_VIDEO_AFD_4_3_FULL_16_9_FULL = 8,
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GST_VIDEO_AFD_4_3_FULL_4_3_PILLAR = 9,
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GST_VIDEO_AFD_16_9_LETTER_16_9_FULL = 10,
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GST_VIDEO_AFD_14_9_LETTER_14_9_PILLAR = 11,
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GST_VIDEO_AFD_4_3_FULL_14_9_CENTER = 13,
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GST_VIDEO_AFD_16_9_LETTER_14_9_CENTER = 14,
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GST_VIDEO_AFD_16_9_LETTER_4_3_CENTER = 15
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} GstVideoAFDValue;
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/**
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* GstVideoAFDSpec:
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* @GST_VIDEO_AFD_SPEC_DVB_ETSI: AFD value is from DVB/ETSI standard
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* @GST_VIDEO_AFD_SPEC_ATSC_A53: AFD value is from ATSC A/53 standard
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* @GST_VIDEO_AFD_SPEC_SMPT_ST2016_1 : AFD value is from SMPTE ST2016-1 standard
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*
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* Enumeration of the different standards that may apply to AFD data:
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*
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* 0) ETSI/DVB:
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* https://www.etsi.org/deliver/etsi_ts/101100_101199/101154/02.01.01_60/ts_101154v020101p.pdf
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*
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* 1) ATSC A/53:
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* 2) SMPTE ST2016-1:
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*
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* Since: 1.18
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*/
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typedef enum {
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GST_VIDEO_AFD_SPEC_DVB_ETSI,
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GST_VIDEO_AFD_SPEC_ATSC_A53,
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GST_VIDEO_AFD_SPEC_SMPTE_ST2016_1
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} GstVideoAFDSpec;
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/**
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* GstVideoAFDMeta:
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* @meta: parent #GstMeta
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* @field: 0 for progressive or field 1 and 1 for field 2
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* @spec: #GstVideoAFDSpec that applies to @afd
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* @afd: #GstVideoAFDValue AFD value
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*
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* Active Format Description (AFD)
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*
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* For details, see Table 6.14 Active Format in:
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*
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* ATSC Digital Television Standard:
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* Part 4 – MPEG-2 Video System Characteristics
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*
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* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
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*
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* and Active Format Description in Complete list of AFD codes
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*
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* https://en.wikipedia.org/wiki/Active_Format_Description#Complete_list_of_AFD_codes
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*
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* and SMPTE ST2016-1
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*
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* Since: 1.18
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*/
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typedef struct {
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GstMeta meta;
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guint8 field;
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GstVideoAFDSpec spec;
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GstVideoAFDValue afd;
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} GstVideoAFDMeta;
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GST_VIDEO_API GType gst_video_afd_meta_api_get_type (void);
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#define GST_VIDEO_AFD_META_API_TYPE (gst_video_afd_meta_api_get_type())
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GST_VIDEO_API const GstMetaInfo *gst_video_afd_meta_get_info (void);
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#define GST_VIDEO_AFD_META_INFO (gst_video_afd_meta_get_info())
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/**
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* gst_buffer_get_video_afd_meta:
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* @b: A #GstBuffer
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*
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* Gets the #GstVideoAFDMeta that might be present on @b.
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*
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* Note: there may be two #GstVideoAFDMeta structs for interlaced video.
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*
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* Since: 1.18
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*
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* Returns: (nullable): The first #GstVideoAFDMeta present on @b, or %NULL if
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* no #GstVideoAFDMeta are present
|
||
*/
|
||
#define gst_buffer_get_video_afd_meta(b) \
|
||
((GstVideoAFDMeta*)gst_buffer_get_meta((b),GST_VIDEO_AFD_META_API_TYPE))
|
||
|
||
GST_VIDEO_API
|
||
GstVideoAFDMeta *gst_buffer_add_video_afd_meta (GstBuffer * buffer, guint8 field,
|
||
GstVideoAFDSpec spec,
|
||
GstVideoAFDValue afd);
|
||
/**
|
||
* GstVideoBarMeta:
|
||
* @meta: parent #GstMeta
|
||
* @field: 0 for progressive or field 1 and 1 for field 2
|
||
* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
|
||
* @bar_data1: If @is_letterbox is true, then the value specifies the
|
||
* last line of a horizontal letterbox bar area at top of reconstructed frame.
|
||
* Otherwise, it specifies the last horizontal luminance sample of a vertical pillarbox
|
||
* bar area at the left side of the reconstructed frame
|
||
* @bar_data2: If @is_letterbox is true, then the value specifies the
|
||
* first line of a horizontal letterbox bar area at bottom of reconstructed frame.
|
||
* Otherwise, it specifies the first horizontal
|
||
* luminance sample of a vertical pillarbox bar area at the right side of the reconstructed frame.
|
||
*
|
||
* Bar data should be included in video user data
|
||
* whenever the rectangular picture area containing useful information
|
||
* does not extend to the full height or width of the coded frame
|
||
* and AFD alone is insufficient to describe the extent of the image.
|
||
*
|
||
* Note: either vertical or horizontal bars are specified, but not both.
|
||
*
|
||
* For more details, see:
|
||
*
|
||
* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
|
||
*
|
||
* and SMPTE ST2016-1
|
||
*
|
||
* Since: 1.18
|
||
*/
|
||
typedef struct {
|
||
GstMeta meta;
|
||
|
||
guint8 field;
|
||
gboolean is_letterbox;
|
||
guint bar_data1;
|
||
guint bar_data2;
|
||
} GstVideoBarMeta;
|
||
|
||
GST_VIDEO_API GType gst_video_bar_meta_api_get_type (void);
|
||
#define GST_VIDEO_BAR_META_API_TYPE (gst_video_bar_meta_api_get_type())
|
||
|
||
GST_VIDEO_API const GstMetaInfo *gst_video_bar_meta_get_info (void);
|
||
#define GST_VIDEO_BAR_META_INFO (gst_video_bar_meta_get_info())
|
||
/**
|
||
* gst_buffer_get_video_bar_meta:
|
||
* @b: A #GstBuffer
|
||
*
|
||
* Gets the #GstVideoBarMeta that might be present on @b.
|
||
*
|
||
* Since: 1.18
|
||
*
|
||
* Returns: (nullable): The first #GstVideoBarMeta present on @b, or %NULL if
|
||
* no #GstVideoBarMeta are present
|
||
*/
|
||
#define gst_buffer_get_video_bar_meta(b) \
|
||
((GstVideoBarMeta*)gst_buffer_get_meta((b),GST_VIDEO_BAR_META_API_TYPE))
|
||
|
||
GST_VIDEO_API
|
||
GstVideoBarMeta *gst_buffer_add_video_bar_meta (GstBuffer * buffer, guint8 field,
|
||
gboolean is_letterbox, guint bar_data1, guint bar_data2);
|
||
|
||
/* Closed Caption support */
|
||
/**
|
||
* GstVideoCaptionType:
|
||
* @GST_VIDEO_CAPTION_TYPE_UNKNOWN: Unknown type of CC
|
||
* @GST_VIDEO_CAPTION_TYPE_CEA608_RAW: CEA-608 as byte pairs. Note that
|
||
* this format is not recommended since is does not specify to
|
||
* which field the caption comes from and therefore assumes
|
||
* it comes from the first field (and that there is no information
|
||
* on the second field). Use @GST_VIDEO_CAPTION_TYPE_CEA708_RAW
|
||
* if you wish to store CEA-608 from two fields and prefix each byte pair
|
||
* with 0xFC for the first field and 0xFD for the second field.
|
||
* @GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A: CEA-608 as byte triplets as defined
|
||
* in SMPTE S334-1 Annex A. The second and third byte of the byte triplet
|
||
* is the raw CEA608 data, the first byte is a bitfield: The top/7th bit is
|
||
* 0 for the second field, 1 for the first field, bit 6 and 5 are 0 and
|
||
* bits 4 to 0 are a 5 bit unsigned integer that represents the line
|
||
* offset relative to the base-line of the original image format (line 9
|
||
* for 525-line field 1, line 272 for 525-line field 2, line 5 for
|
||
* 625-line field 1 and line 318 for 625-line field 2).
|
||
* @GST_VIDEO_CAPTION_TYPE_CEA708_RAW: CEA-708 as cc_data byte triplets. They
|
||
* can also contain 608-in-708 and the first byte of each triplet has to
|
||
* be inspected for detecting the type.
|
||
* @GST_VIDEO_CAPTION_TYPE_CEA708_CDP: CEA-708 (and optionally CEA-608) in
|
||
* a CDP (Caption Distribution Packet) defined by SMPTE S-334-2.
|
||
* Contains the whole CDP (starting with 0x9669).
|
||
*
|
||
* The various known types of Closed Caption (CC).
|
||
*
|
||
* Since: 1.16
|
||
*/
|
||
typedef enum {
|
||
GST_VIDEO_CAPTION_TYPE_UNKNOWN = 0,
|
||
GST_VIDEO_CAPTION_TYPE_CEA608_RAW = 1,
|
||
GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A = 2,
|
||
GST_VIDEO_CAPTION_TYPE_CEA708_RAW = 3,
|
||
GST_VIDEO_CAPTION_TYPE_CEA708_CDP = 4
|
||
} GstVideoCaptionType;
|
||
|
||
GST_VIDEO_API
|
||
GstVideoCaptionType
|
||
gst_video_caption_type_from_caps (const GstCaps *caps);
|
||
|
||
GST_VIDEO_API
|
||
GstCaps *
|
||
gst_video_caption_type_to_caps (GstVideoCaptionType type);
|
||
|
||
/**
|
||
* GstVideoCaptionMeta:
|
||
* @meta: parent #GstMeta
|
||
* @caption_type: The type of Closed Caption contained in the meta.
|
||
* @data: (array length=size): The Closed Caption data.
|
||
* @size: The size in bytes of @data
|
||
*
|
||
* Extra buffer metadata providing Closed Caption.
|
||
*
|
||
* Since: 1.16
|
||
*/
|
||
typedef struct {
|
||
GstMeta meta;
|
||
|
||
GstVideoCaptionType caption_type;
|
||
guint8 *data;
|
||
gsize size;
|
||
} GstVideoCaptionMeta;
|
||
|
||
GST_VIDEO_API
|
||
GType gst_video_caption_meta_api_get_type (void);
|
||
#define GST_VIDEO_CAPTION_META_API_TYPE (gst_video_caption_meta_api_get_type())
|
||
|
||
GST_VIDEO_API
|
||
const GstMetaInfo *gst_video_caption_meta_get_info (void);
|
||
#define GST_VIDEO_CAPTION_META_INFO (gst_video_caption_meta_get_info())
|
||
|
||
/**
|
||
* gst_buffer_get_video_caption_meta:
|
||
* @b: A #GstBuffer
|
||
*
|
||
* Gets the #GstVideoCaptionMeta that might be present on @b.
|
||
*
|
||
* Since: 1.16
|
||
*
|
||
* Returns: (nullable): The first #GstVideoCaptionMeta present on @b, or %NULL if
|
||
* no #GstVideoCaptionMeta are present
|
||
*/
|
||
#define gst_buffer_get_video_caption_meta(b) \
|
||
((GstVideoCaptionMeta*)gst_buffer_get_meta((b),GST_VIDEO_CAPTION_META_API_TYPE))
|
||
|
||
GST_VIDEO_API
|
||
GstVideoCaptionMeta *gst_buffer_add_video_caption_meta (GstBuffer * buffer,
|
||
GstVideoCaptionType caption_type,
|
||
const guint8 *data,
|
||
gsize size);
|
||
|
||
/**
|
||
* GstVideoVBIParser:
|
||
*
|
||
* A parser for detecting and extracting @GstVideoAncillary data from
|
||
* Vertical Blanking Interval lines of component signals.
|
||
*
|
||
* Since: 1.16
|
||
*/
|
||
|
||
typedef struct _GstVideoVBIParser GstVideoVBIParser;
|
||
|
||
GST_VIDEO_API
|
||
GType gst_video_vbi_parser_get_type (void);
|
||
|
||
/**
|
||
* GstVideoVBIParserResult:
|
||
* @GST_VIDEO_VBI_PARSER_RESULT_DONE: No line were provided, or no more Ancillary data was found.
|
||
* @GST_VIDEO_VBI_PARSER_RESULT_OK: A #GstVideoAncillary was found.
|
||
* @GST_VIDEO_VBI_PARSER_RESULT_ERROR: An error occurred
|
||
*
|
||
* Return values for #GstVideoVBIParser
|
||
*
|
||
* Since: 1.16
|
||
*/
|
||
typedef enum {
|
||
GST_VIDEO_VBI_PARSER_RESULT_DONE = 0,
|
||
GST_VIDEO_VBI_PARSER_RESULT_OK = 1,
|
||
GST_VIDEO_VBI_PARSER_RESULT_ERROR = 2
|
||
} GstVideoVBIParserResult;
|
||
|
||
GST_VIDEO_API
|
||
GstVideoVBIParserResult gst_video_vbi_parser_get_ancillary(GstVideoVBIParser *parser,
|
||
GstVideoAncillary *anc);
|
||
|
||
GST_VIDEO_API
|
||
GstVideoVBIParser *gst_video_vbi_parser_new (GstVideoFormat format, guint32 pixel_width);
|
||
|
||
GST_VIDEO_API
|
||
GstVideoVBIParser *gst_video_vbi_parser_copy (const GstVideoVBIParser *parser);
|
||
|
||
GST_VIDEO_API
|
||
void gst_video_vbi_parser_free (GstVideoVBIParser *parser);
|
||
|
||
GST_VIDEO_API
|
||
void gst_video_vbi_parser_add_line (GstVideoVBIParser *parser, const guint8 *data);
|
||
|
||
/**
|
||
* GstVideoVBIEncoder:
|
||
*
|
||
* An encoder for writing ancillary data to the
|
||
* Vertical Blanking Interval lines of component signals.
|
||
*
|
||
* Since: 1.16
|
||
*/
|
||
|
||
typedef struct _GstVideoVBIEncoder GstVideoVBIEncoder;
|
||
|
||
GST_VIDEO_API
|
||
GType gst_video_vbi_encoder_get_type (void);
|
||
|
||
GST_VIDEO_API
|
||
GstVideoVBIEncoder *gst_video_vbi_encoder_new (GstVideoFormat format, guint32 pixel_width);
|
||
|
||
GST_VIDEO_API
|
||
GstVideoVBIEncoder *gst_video_vbi_encoder_copy (const GstVideoVBIEncoder *encoder);
|
||
|
||
GST_VIDEO_API
|
||
void gst_video_vbi_encoder_free (GstVideoVBIEncoder *encoder);
|
||
|
||
GST_VIDEO_API
|
||
gboolean gst_video_vbi_encoder_add_ancillary (GstVideoVBIEncoder *encoder,
|
||
gboolean composite,
|
||
guint8 DID,
|
||
guint8 SDID_block_number,
|
||
const guint8 *data,
|
||
guint data_count);
|
||
|
||
GST_VIDEO_API
|
||
void gst_video_vbi_encoder_write_line (GstVideoVBIEncoder *encoder, guint8 *data);
|
||
|
||
G_END_DECLS
|
||
|
||
#endif /* __GST_VIDEO_ANC_H__ */
|