mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 01:00:37 +00:00
9dceb6ca52
This commits add common elements for Ancillary Data and Closed Caption support in GStreamer: * A VBI (Video Blanking Interval) parser that supports detection and extraction of Ancillary data according to the SMPTE S291M specification. Currently supports the v210 and UYVY video formats. * A new GstMeta for Closed Caption : GstVideoCaptionMeta. This supports the two types of CC : CEA-608 and CEA-708, along with the 4 different ways they can be transported (other systems are super-set of those). https://bugzilla.gnome.org/show_bug.cgi?id=794901
229 lines
7.4 KiB
C
229 lines
7.4 KiB
C
/* GStreamer
|
|
* Copyright (C) <2018> Edward Hervey <edward@centricular.com>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __GST_VIDEO_ANC_H__
|
|
#define __GST_VIDEO_ANC_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/video/video-format.h>
|
|
#include <gst/video/video-info.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _GstVideoAncillary GstVideoAncillary;
|
|
|
|
/**
|
|
* GstVideoAncillary:
|
|
* @DID: The Data Identifier
|
|
* @SDID_block_number: The Secondary Data Identifier (if type 2) or the Data
|
|
* Block Number (if type 2)
|
|
* @data_count: The amount of data (in bytes) in @data (max 255 bytes)
|
|
* @data: (array length=data_count): The user data content of the Ancillary packet.
|
|
* Does not contain the ADF, DID, SDID nor CS.
|
|
*
|
|
* Video Ancillary data, according to SMPTE-291M specification.
|
|
*
|
|
* Note that the contents of the data are always stored as 8bit data (i.e. do not contain
|
|
* the parity check bits).
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
struct _GstVideoAncillary {
|
|
guint8 DID;
|
|
guint8 SDID_block_number;
|
|
guint8 data_count;
|
|
guint8 data[256];
|
|
|
|
/*< private >*/
|
|
/* Padding for future extension */
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
typedef enum {
|
|
GST_VIDEO_ANCILLARY_DID_UNDEFINED = 0x00,
|
|
GST_VIDEO_ANCILLARY_DID_DELETION = 0x80,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_3G_AUDIO_DATA_FIRST = 0xa0,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_3G_AUDIO_DATA_LAST = 0xa7,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_HDTV_AUDIO_DATA_FIRST = 0xe0,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_HDTV_AUDIO_DATA_LAST = 0xe7,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_1_FIRST = 0xec,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_1_LAST = 0xef,
|
|
GST_VIDEO_ANCILLARY_DID_CAMERA_POSITION = 0xf0,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_ERROR_DETECTION = 0xf4,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_2_FIRST = 0xf8,
|
|
GST_VIDEO_ANCILLARY_DID_HANC_SDTV_AUDIO_DATA_2_LAST = 0xff,
|
|
} GstVideoAncillaryDID;
|
|
|
|
/**
|
|
* GST_VIDEO_ANCILLARY_DID16:
|
|
* @anc: a #GstVideoAncillary
|
|
*
|
|
* Returns the #GstVideoAncillaryDID16 of the ancillary data.
|
|
*
|
|
* Since: 1.16
|
|
*
|
|
* Returns: a #GstVideoAncillaryDID16 identifier
|
|
*/
|
|
#define GST_VIDEO_ANCILLARY_DID16(anc) ((guint16)((anc)->DID) << 8 | (guint16)((anc)->SDID_block_number))
|
|
|
|
/**
|
|
* GstVideoAncillaryDID16:
|
|
* @GST_VIDEO_ANCILLARY_DID16_S334_EIA_708: CEA 708 Ancillary data according to SMPTE 334
|
|
* @GST_VIDEO_ANCILLARY_DID16_S334_EIA_608: CEA 608 Ancillary data according to SMPTE 334
|
|
*
|
|
* Some know types of Ancillary Data identifiers.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
typedef enum {
|
|
GST_VIDEO_ANCILLARY_DID16_S334_EIA_708 = 0x6101,
|
|
GST_VIDEO_ANCILLARY_DID16_S334_EIA_608 = 0x6102,
|
|
} GstVideoAncillaryDID16;
|
|
|
|
/* 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_CEA608_IN_CEA708_RAW
|
|
* if you wish to store CEA-608 from two fields.
|
|
* @GST_VIDEO_CAPTION_TYPE_CEA608_IN_CEA708_RAW: CEA-608 as cc_data byte triplets.
|
|
* The first byte of each triplet shall specify the field as in CEA-708
|
|
* (i.e: 0xFC for the first field or 0xFD for the second field.). The 2nd
|
|
* and 3rd byte of each triplet at the cc1 and cc2 bytes. Use this if
|
|
* there is *only* CEA-608 caption. If there is also CEA-708 caption,
|
|
* use @GST_VIDEO_CAPTION_TYPE_CEA708_RAW.
|
|
* @GST_VIDEO_CAPTION_TYPE_CEA708_RAW: CEA-708 as cc_data byte triplets. They
|
|
* can also contain 608-in-708.
|
|
* @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_IN_CEA708_RAW = 2,
|
|
GST_VIDEO_CAPTION_TYPE_CEA708_RAW = 3,
|
|
GST_VIDEO_CAPTION_TYPE_CEA708_CDP = 4
|
|
} GstVideoCaptionType;
|
|
|
|
/**
|
|
* 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: 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 occured
|
|
*
|
|
* 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);
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_VIDEO_ANC_H__ */
|