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77937f9398
The function does not free the structure but the data contained within. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1458>
207 lines
6.1 KiB
C
207 lines
6.1 KiB
C
/* GStreamer
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* Copyright (C) <2019> Aaron Boxer <aaron.boxer@collabora.com>
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* Copyright (C) <2019> Collabora Ltd.
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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 __VIDEO_PARSE_UTILS_H__
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#define __VIDEO_PARSE_UTILS_H__
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#include <gst/gst.h>
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#include <gst/base/gstbaseparse.h>
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#include <gst/base/gstbytereader.h>
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#include <gst/video/video-anc.h>
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#define GST_VIDEO_BAR_MAX_BYTES 9
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/* A53-4 Table 6.7 */
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#define A53_USER_DATA_ID_GA94 0x47413934
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#define A53_USER_DATA_ID_DTG1 0x44544731
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/* custom id for SCTE 20 608 */
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#define USER_DATA_ID_SCTE_20_CC 0xFFFFFFFE
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/* custom id for DirecTV */
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#define USER_DATA_ID_DIRECTV_CC 0xFFFFFFFF
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/* A53-4 Table 6.9 */
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#define A53_USER_DATA_TYPE_CODE_CC_DATA 0x03
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#define A53_USER_DATA_TYPE_CODE_BAR_DATA 0x06
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/* ANSI/SCTE 21 Additional EIA 608 Data
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* https://www.scte.org/documents/pdf/Standards/ANSISCTE212001R2006.pdf*/
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#define A53_USER_DATA_TYPE_CODE_SCTE_21_EIA_608_CC_DATA 0x04
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/* CEA-708 Table 2 */
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#define CEA_708_PROCESS_CC_DATA_FLAG 0x40
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#define CEA_708_PROCESS_EM_DATA_FLAG 0x80
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/* country codes */
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#define ITU_T_T35_COUNTRY_CODE_US 0xB5
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/* provider codes */
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#define ITU_T_T35_MANUFACTURER_US_ATSC 0x31
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#define ITU_T_T35_MANUFACTURER_US_DIRECTV 0x2F
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/*
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* GstVideoAFDAspectRatio:
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* @GST_VIDEO_AFD_ASPECT_RATIO_UNDEFINED: aspect ratio is undefined
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* @GST_VIDEO_AFD_ASPECT_RATIO_4_3: 4:3 aspect ratio
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* @GST_VIDEO_AFD_ASPECT_RATIO_16_9: 16:9 aspect ratio
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*
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* Enumeration of the different AFD aspect ratios (SMPTE ST2016-1 only)
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*/
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typedef enum {
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GST_VIDEO_AFD_ASPECT_RATIO_UNDEFINED,
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GST_VIDEO_AFD_ASPECT_RATIO_4_3,
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GST_VIDEO_AFD_ASPECT_RATIO_16_9
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} GstVideoAFDAspectRatio;
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/*
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* GstVideoParseUtilsField:
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* @GST_VIDEO_PARSE_UTILS_FIELD_1 progressive or field 1
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* @GST_VIDEO_PARSE_UTILS_FIELD_2 field 2
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*
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* Enumeration of fields
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*/
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typedef enum {
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GST_VIDEO_PARSE_UTILS_FIELD_1,
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GST_VIDEO_PARSE_UTILS_FIELD_2
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} GstVideoParseUtilsField;
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/*
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* GstVideoAFD:
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* @field: #GstVideoParseUtilsField for @afd
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* @aspect_ratio: #GstVideoAFDAspectRatio for frame
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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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typedef struct {
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GstVideoParseUtilsField field;
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GstVideoAFDAspectRatio aspect_ratio;
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GstVideoAFDSpec spec;
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GstVideoAFDValue afd;
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} GstVideoAFD;
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/*
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* GstVideoBarData:
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* @field: GstVideoParseUtilsField for bar data
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* @is_letterbox: if true then bar data specifies letterbox, otherwise pillarbox
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* @bar_data: An array of size 2. if @is_letterbox is true, then two values specify
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* last line of a horizontal letterbox bar area at top of reconstructed frame
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* and first line of a horizontal letterbox bar area at bottom of reconstructed frame
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* otherwise, two values specify
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* last horizontal luminance sample of a vertical pillarbox bar area at the left side
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* of the reconstructed frame, and first horizontal luminance sample of a vertical pillarbox
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* bar area at the right side of the reconstructed frame
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*
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* Bar data should be included in video user data
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* whenever the rectangular picture area containing useful information
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* does not extend to the full height or width of the coded frame
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* and AFD alone is insufficient to describe the extent of the image.
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*
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* Note: either vertical or horizontal bars are specified, but not both.
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*
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* For more details, see:
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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 SMPTE ST2016-1
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*/
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typedef struct {
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GstVideoParseUtilsField field;
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gboolean is_letterbox;
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guint bar_data[2];
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} GstVideoBarData;
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/*
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* GstVideoParseUserData
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*
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* Holds unparsed and parsed user data for closed captions, AFD and Bar data.
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*/
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typedef struct
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{
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GstVideoParseUtilsField field;
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/* pending closed captions */
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guint8 closedcaptions[96];
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guint closedcaptions_size;
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GstVideoCaptionType closedcaptions_type;
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/* pending bar data */
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guint8 bar_data[GST_VIDEO_BAR_MAX_BYTES];
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guint bar_data_size;
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gboolean has_bar_data;
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/* parsed bar data */
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GstVideoBarData bar_parsed;
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/* pending AFD data */
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guint8 afd;
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gboolean active_format_flag;
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GstVideoAFDSpec afd_spec;
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gboolean has_afd;
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/* parsed afd data */
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GstVideoAFD afd_parsed;
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} GstVideoParseUserData;
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/*
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* GstVideoParseUserDataUnregistered
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*
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* Holds unparsed User Data Unregistered.
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*/
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typedef struct
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{
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guint8 uuid[16];
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guint8 *data;
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gsize size;
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} GstVideoParseUserDataUnregistered;
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G_BEGIN_DECLS
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void gst_video_parse_user_data(GstElement * elt, GstVideoParseUserData * user_data,
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GstByteReader * br, guint8 field, guint16 provider_code);
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void gst_video_parse_user_data_unregistered(GstElement * elt, GstVideoParseUserDataUnregistered * user_data,
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GstByteReader * br, guint8 uuid[16]);
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void gst_video_user_data_unregistered_clear(GstVideoParseUserDataUnregistered * user_data);
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void gst_video_push_user_data(GstElement * elt, GstVideoParseUserData * user_data,
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GstBuffer * buf);
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void gst_video_push_user_data_unregistered(GstElement * elt, GstVideoParseUserDataUnregistered * user_data,
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GstBuffer * buf);
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G_END_DECLS
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#endif /* __VIDEO_PARSE_UTILS_H__ */
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