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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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1303 lines
36 KiB
C
1303 lines
36 KiB
C
/* GStreamer
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* Copyright (C) 2018 Edward Hervey <edward@centricular.com>
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* Copyright (C) 2018 Sebastian Dröge <sebastian@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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <gst/base/gstbytereader.h>
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#include "video-anc.h"
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#if !GLIB_CHECK_VERSION(2, 47, 4)
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#ifdef __GNUC__
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#define G_GNUC_CHECK_VERSION(major, minor) \
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((__GNUC__ > (major)) || \
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((__GNUC__ == (major)) && \
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(__GNUC_MINOR__ >= (minor))))
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#else
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#define G_GNUC_CHECK_VERSION(major, minor) 0
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#endif
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#endif
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/**
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* SECTION:gstvideoanc
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* @title: GstVideo Ancillary
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* @short_description: Utilities for Ancillary data, VBI and Closed Caption
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*
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* A collection of objects and methods to assist with handling Ancillary Data
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* present in Vertical Blanking Interval as well as Closed Caption.
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*/
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#ifndef GST_DISABLE_GST_DEBUG
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#define GST_CAT_DEFAULT ensure_debug_category()
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static GstDebugCategory *
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ensure_debug_category (void)
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{
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static gsize cat_gonce = 0;
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if (g_once_init_enter (&cat_gonce)) {
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gsize cat_done;
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cat_done = (gsize) _gst_debug_category_new ("video-anc", 0,
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"Ancillary data, VBI and CC utilities");
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g_once_init_leave (&cat_gonce, cat_done);
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}
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return (GstDebugCategory *) cat_gonce;
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}
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#else
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#define ensure_debug_category() /* NOOP */
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#endif /* GST_DISABLE_GST_DEBUG */
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struct _GstVideoVBIParser
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{
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GstVideoInfo info; /* format of the lines provided */
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guint8 *work_data; /* Converted line in planar 16bit format */
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guint32 work_data_size; /* Size in bytes of work_data */
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guint offset; /* Current offset (in bytes) in work_data */
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gboolean bit16; /* Data is stored as 16bit if TRUE. Else 8bit(without parity) */
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};
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G_DEFINE_BOXED_TYPE (GstVideoVBIParser, gst_video_vbi_parser,
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(GBoxedCopyFunc) gst_video_vbi_parser_copy,
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(GBoxedFreeFunc) gst_video_vbi_parser_free);
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GstVideoVBIParser *
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gst_video_vbi_parser_copy (const GstVideoVBIParser * parser)
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{
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GstVideoVBIParser *res;
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g_return_val_if_fail (parser != NULL, NULL);
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res = gst_video_vbi_parser_new (GST_VIDEO_INFO_FORMAT (&parser->info),
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parser->info.width);
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if (res) {
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memcpy (res->work_data, parser->work_data, parser->work_data_size);
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}
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return res;
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}
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/* See SMPTE S291 */
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static GstVideoVBIParserResult
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get_ancillary_16 (GstVideoVBIParser * parser, GstVideoAncillary * anc)
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{
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gboolean found = FALSE;
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const guint16 *data = (const guint16 *) parser->work_data;
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g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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/* 3 words are needed at least to detect what kind of packet we look at
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*
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* - ADF (SMPTE S291 3.2.1) in case of component ancillary format:
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* 0x000 0x3ff 0x3ff (followed by DID, SDID)
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* - ADF (SMPTE S291 3.2.2) in case of composite ancillary format:
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* 0x3fc DID SDID
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*/
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while (parser->offset + 3 < parser->work_data_size) {
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guint8 DID, SDID, DC;
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guint i = 0, j;
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guint checksum = 0;
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gboolean composite;
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/* Look for ADF */
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if (data[parser->offset] == 0x3fc) {
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/* composite */
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i += 1;
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composite = TRUE;
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} else if (data[parser->offset] == 0x000 &&
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data[parser->offset + 1] == 0x3ff &&
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data[parser->offset + 1] == 0x3ff) {
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/* component */
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i += 3;
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composite = FALSE;
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} else {
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parser->offset += 1;
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continue;
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}
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/* TODO: Might want to check parity bits here but the checksum in
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* the end should really be enough */
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/* 4 words: DID, SDID, DC, [DATA], checksum */
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if (parser->offset + i + 4 >= parser->work_data_size)
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goto not_enough_data;
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/* We have a valid ADF */
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DID = data[parser->offset + i] & 0xff;
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SDID = data[parser->offset + i + 1] & 0xff;
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DC = data[parser->offset + i + 2] & 0xff;
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i += 3;
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/* Check if we have enough room to get the User Data and checksum */
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if (parser->offset + i + DC + 1 >= parser->work_data_size)
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goto not_enough_data;
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/* We found a valid ANC \o/ */
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anc->DID = DID;
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anc->SDID_block_number = SDID;
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anc->data_count = DC;
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memset (anc->data, 0, 256);
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/* FIXME: We assume here the same data format for the user data as for the
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* DID/SDID: 10 bits with parity in the upper 2 bits. In theory some
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* standards could define this differently and even have full 10 bits of
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* user data but there does not seem to be a single such standard after
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* all these years.
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*/
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/* i is at the beginning of the user data now */
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for (j = 0; j < anc->data_count; j++)
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anc->data[j] = data[parser->offset + i + j] & 0xff;
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i += DC;
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/* Checksum calculation SMPTE S291 3.2.1 */
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for (j = (composite ? 1 : 3); j < i; j++)
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checksum += data[parser->offset + j] & 0x1ff;
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checksum &= 0x1ff;
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checksum |= (!(checksum >> 8)) << 9;
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if (checksum != (data[parser->offset + i] & 0x3ff)) {
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GST_WARNING ("ADF checksum mismatch: expected 0x%03x, got 0x%03x",
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checksum, (data[parser->offset + i] & 0x3ff));
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parser->offset += 1;
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continue;
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}
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i += 1;
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found = TRUE;
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parser->offset += i;
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break;
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}
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if (found)
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return GST_VIDEO_VBI_PARSER_RESULT_OK;
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return GST_VIDEO_VBI_PARSER_RESULT_DONE;
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/* ERRORS */
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not_enough_data:
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{
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GST_WARNING ("ANC requires more User Data than available line size");
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/* Avoid further calls to go in the same error */
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parser->offset = parser->work_data_size;
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return GST_VIDEO_VBI_PARSER_RESULT_ERROR;
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}
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}
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/* See SMPTE S291 */
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static GstVideoVBIParserResult
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get_ancillary_8 (GstVideoVBIParser * parser, GstVideoAncillary * anc)
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{
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gboolean found = FALSE;
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const guint8 *data = parser->work_data;
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g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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/* 3 words are needed at least to detect what kind of packet we look at
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*
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* - ADF (SMPTE S291 3.2.1) in case of component ancillary format:
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* 0x000 0x3ff 0x3ff (followed by DID, SDID)
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* - ADF (SMPTE S291 3.2.2) in case of composite ancillary format:
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* 0x3fc DID SDID
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*/
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while (parser->offset + 3 < parser->work_data_size) {
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guint8 DID, SDID, DC;
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guint i = 0, j;
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gboolean composite;
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guint checksum = 0;
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/* Look for ADF */
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if (data[parser->offset] == 0xfc) {
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/* composite */
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composite = TRUE;
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i += 1;
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} else if (data[parser->offset] == 0x00 &&
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data[parser->offset + 1] == 0xff && data[parser->offset + 1] == 0xff) {
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/* component */
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composite = FALSE;
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i += 3;
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} else {
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parser->offset += 1;
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continue;
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}
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/* 4 words: DID, SDID, DC, [DATA], checksum */
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if (parser->offset + i + 4 >= parser->work_data_size)
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goto not_enough_data;
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/* We have a valid ADF */
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DID = data[parser->offset + i];
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SDID = data[parser->offset + i + 1];
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DC = data[parser->offset + i + 2];
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i += 3;
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/* Check if we have enough room to get the User Data and checksum */
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if (parser->offset + i + DC + 1 >= parser->work_data_size)
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goto not_enough_data;
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/* We found a valid ANC \o/ */
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anc->DID = DID;
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anc->SDID_block_number = SDID;
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anc->data_count = DC;
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memset (anc->data, 0, 256);
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/* i is at the beginning of the user data now */
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for (j = 0; j < anc->data_count; j++)
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anc->data[j] = data[parser->offset + i + j] & 0xff;
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i += DC;
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/* Checksum calculation SMPTE S291 3.2.1 */
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for (j = (composite ? 1 : 3); j < i; j++)
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checksum += data[parser->offset + j];
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checksum &= 0xff;
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if (checksum != data[parser->offset + i]) {
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GST_WARNING ("ADF checksum mismatch: expected 0x%02x, got 0x%02x",
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checksum, data[parser->offset + i]);
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parser->offset += 1;
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continue;
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}
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i += 1;
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found = TRUE;
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parser->offset += i;
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break;
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}
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if (found)
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return GST_VIDEO_VBI_PARSER_RESULT_OK;
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return GST_VIDEO_VBI_PARSER_RESULT_DONE;
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/* ERRORS */
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not_enough_data:
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{
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GST_WARNING ("ANC requires more User Data than available line size");
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/* Avoid further calls to go in the same error */
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parser->offset = parser->work_data_size;
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return GST_VIDEO_VBI_PARSER_RESULT_ERROR;
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}
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}
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/**
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* gst_video_vbi_parser_get_ancillary:
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* @parser: a #GstVideoVBIParser
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* @anc: (out caller-allocates): a #GstVideoAncillary to start the eventual ancillary data
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*
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* Parse the line provided previously by gst_video_vbi_parser_add_line().
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*
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* Since: 1.16
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*
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* Returns: %GST_VIDEO_VBI_PARSER_RESULT_OK if ancillary data was found and
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* @anc was filled. %GST_VIDEO_VBI_PARSER_RESULT_DONE if there wasn't any
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* data.
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*/
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GstVideoVBIParserResult
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gst_video_vbi_parser_get_ancillary (GstVideoVBIParser * parser,
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GstVideoAncillary * anc)
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{
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g_return_val_if_fail (parser != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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g_return_val_if_fail (anc != NULL, GST_VIDEO_VBI_PARSER_RESULT_ERROR);
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if (parser->bit16)
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return get_ancillary_16 (parser, anc);
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return get_ancillary_8 (parser, anc);
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}
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/**
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* gst_video_vbi_parser_new:
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* @format: a #GstVideoFormat
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* @pixel_width: The width in pixel to use
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*
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* Create a new #GstVideoVBIParser for the specified @format and @pixel_width.
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*
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* Since: 1.16
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*
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* Returns: The new #GstVideoVBIParser or %NULL if the @format and/or @pixel_width
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* is not supported.
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*/
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GstVideoVBIParser *
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gst_video_vbi_parser_new (GstVideoFormat format, guint32 pixel_width)
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{
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GstVideoVBIParser *parser;
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g_return_val_if_fail (pixel_width > 0, NULL);
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switch (format) {
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case GST_VIDEO_FORMAT_v210:
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parser = g_new0 (GstVideoVBIParser, 1);
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parser->bit16 = TRUE;
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break;
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case GST_VIDEO_FORMAT_UYVY:
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parser = g_new0 (GstVideoVBIParser, 1);
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parser->bit16 = FALSE;
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break;
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default:
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GST_WARNING ("Format not supported by GstVideoVBIParser");
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return NULL;
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}
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gst_video_info_init (&parser->info);
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if (!gst_video_info_set_format (&parser->info, format, pixel_width, 1)) {
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GST_ERROR ("Could not create GstVideoInfo");
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g_free (parser);
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return NULL;
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}
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/* Allocate the workspace which is going to be 2 * pixel_width big
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* 2 : number of pixels per "component" (we only deal with 4:2:2)
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* We use 1 or 2 bytes per pixel depending on whether we are internally
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* working in 8 or 16bit */
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parser->work_data_size = 2 * pixel_width;
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if (parser->bit16)
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parser->work_data = g_malloc0 (parser->work_data_size * 2);
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else
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parser->work_data = g_malloc0 (parser->work_data_size);
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parser->offset = 0;
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return parser;
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}
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/**
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* gst_video_vbi_parser_free:
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* @parser: a #GstVideoVBIParser
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*
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* Frees the @parser.
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*
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* Since: 1.16
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*/
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void
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gst_video_vbi_parser_free (GstVideoVBIParser * parser)
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{
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g_return_if_fail (parser != NULL);
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g_free (parser->work_data);
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g_free (parser);
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}
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static void
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convert_line_from_uyvy (GstVideoVBIParser * parser, const guint8 * data)
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{
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guint i;
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guint8 *y = parser->work_data;
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/* Data is stored differently in SD, making no distinction between Y and UV */
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if (parser->info.width < 1280) {
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for (i = 0; i < parser->info.width - 3; i += 4) {
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*y++ = data[(i / 4) * 4 + 0];
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*y++ = data[(i / 4) * 4 + 1];
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*y++ = data[(i / 4) * 4 + 2];
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*y++ = data[(i / 4) * 4 + 3];
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}
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} else {
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guint8 *uv = y + parser->info.width;
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for (i = 0; i < parser->info.width - 3; i += 4) {
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*uv++ = data[(i / 4) * 4 + 0];
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*y++ = data[(i / 4) * 4 + 1];
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*uv++ = data[(i / 4) * 4 + 2];
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*y++ = data[(i / 4) * 4 + 3];
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}
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}
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GST_MEMDUMP ("Converted line", parser->work_data, 128);
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}
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static void
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gst_info_dump_mem16_line (gchar * linebuf, gsize linebuf_size,
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const guint16 * mem, gsize mem_offset, gsize mem_size)
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{
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gchar hexstr[50], digitstr[6];
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if (mem_size > 8)
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mem_size = 8;
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hexstr[0] = '\0';
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if (mem != NULL) {
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guint i = 0;
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mem += mem_offset;
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while (i < mem_size) {
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g_snprintf (digitstr, sizeof (digitstr), "%04x ", mem[i]);
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g_strlcat (hexstr, digitstr, sizeof (hexstr));
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++i;
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}
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}
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g_snprintf (linebuf, linebuf_size, "%08x: %-48.48s",
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(guint) mem_offset, hexstr);
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}
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static void
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convert_line_from_v210 (GstVideoVBIParser * parser, const guint8 * data)
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{
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guint i;
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guint16 *y = (guint16 *) parser->work_data;
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guint32 a, b, c, d;
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/* Data is stored differently in SD, making no distinction between Y and UV */
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if (parser->info.width < 1280) {
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/* Convert the line */
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for (i = 0; i < parser->info.width - 5; i += 6) {
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a = GST_READ_UINT32_LE (data + (i / 6) * 16 + 0);
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b = GST_READ_UINT32_LE (data + (i / 6) * 16 + 4);
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c = GST_READ_UINT32_LE (data + (i / 6) * 16 + 8);
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d = GST_READ_UINT32_LE (data + (i / 6) * 16 + 12);
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*y++ = (a >> 0) & 0x3ff;
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*y++ = (a >> 10) & 0x3ff;
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*y++ = (a >> 20) & 0x3ff;
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*y++ = (b >> 0) & 0x3ff;
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*y++ = (b >> 10) & 0x3ff;
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*y++ = (b >> 20) & 0x3ff;
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*y++ = (c >> 0) & 0x3ff;
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*y++ = (c >> 10) & 0x3ff;
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*y++ = (c >> 20) & 0x3ff;
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*y++ = (d >> 0) & 0x3ff;
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*y++ = (d >> 10) & 0x3ff;
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*y++ = (d >> 20) & 0x3ff;
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}
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} else {
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guint16 *uv = y + parser->info.width;
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/* Convert the line */
|
|
for (i = 0; i < parser->info.width - 5; i += 6) {
|
|
a = GST_READ_UINT32_LE (data + (i / 6) * 16 + 0);
|
|
b = GST_READ_UINT32_LE (data + (i / 6) * 16 + 4);
|
|
c = GST_READ_UINT32_LE (data + (i / 6) * 16 + 8);
|
|
d = GST_READ_UINT32_LE (data + (i / 6) * 16 + 12);
|
|
|
|
*uv++ = (a >> 0) & 0x3ff;
|
|
*y++ = (a >> 10) & 0x3ff;
|
|
*uv++ = (a >> 20) & 0x3ff;
|
|
*y++ = (b >> 0) & 0x3ff;
|
|
|
|
*uv++ = (b >> 10) & 0x3ff;
|
|
*y++ = (b >> 20) & 0x3ff;
|
|
*uv++ = (c >> 0) & 0x3ff;
|
|
*y++ = (c >> 10) & 0x3ff;
|
|
|
|
*uv++ = (c >> 20) & 0x3ff;
|
|
*y++ = (d >> 0) & 0x3ff;
|
|
*uv++ = (d >> 10) & 0x3ff;
|
|
*y++ = (d >> 20) & 0x3ff;
|
|
}
|
|
}
|
|
|
|
if (0) {
|
|
guint off = 0;
|
|
gsize length = parser->info.width * 2;
|
|
|
|
GST_TRACE ("--------"
|
|
"-------------------------------------------------------------------");
|
|
|
|
while (off < length) {
|
|
gchar buf[128];
|
|
|
|
/* gst_info_dump_mem_line will process 16 bytes (8 16bit chunks) at most */
|
|
gst_info_dump_mem16_line (buf, sizeof (buf),
|
|
(guint16 *) parser->work_data, off, length - off);
|
|
GST_TRACE ("%s", buf);
|
|
off += 8;
|
|
}
|
|
GST_TRACE ("--------"
|
|
"-------------------------------------------------------------------");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_video_vbi_parser_add_line:
|
|
* @parser: a #GstVideoVBIParser
|
|
* @data: (array) (transfer none): The line of data to parse
|
|
*
|
|
* Provide a new line of data to the @parser. Call gst_video_vbi_parser_get_ancillary()
|
|
* to get the Ancillary data that might be present on that line.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
void
|
|
gst_video_vbi_parser_add_line (GstVideoVBIParser * parser, const guint8 * data)
|
|
{
|
|
g_return_if_fail (parser != NULL);
|
|
g_return_if_fail (data != NULL);
|
|
|
|
/* Reset offset */
|
|
parser->offset = 0;
|
|
|
|
switch (GST_VIDEO_INFO_FORMAT (&parser->info)) {
|
|
case GST_VIDEO_FORMAT_v210:
|
|
convert_line_from_v210 (parser, data);
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
convert_line_from_uyvy (parser, data);
|
|
break;
|
|
default:
|
|
GST_ERROR ("UNSUPPORTED FORMAT !");
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
}
|
|
|
|
struct _GstVideoVBIEncoder
|
|
{
|
|
GstVideoInfo info; /* format of the lines provided */
|
|
guint8 *work_data; /* Converted line in planar 16bit format */
|
|
guint32 work_data_size; /* Size in bytes of work_data */
|
|
guint offset; /* Current offset (in bytes) in work_data */
|
|
gboolean bit16; /* Data is stored as 16bit if TRUE. Else 8bit(without parity) */
|
|
};
|
|
|
|
G_DEFINE_BOXED_TYPE (GstVideoVBIEncoder, gst_video_vbi_encoder,
|
|
(GBoxedCopyFunc) gst_video_vbi_encoder_copy,
|
|
(GBoxedFreeFunc) gst_video_vbi_encoder_free);
|
|
|
|
GstVideoVBIEncoder *
|
|
gst_video_vbi_encoder_copy (const GstVideoVBIEncoder * encoder)
|
|
{
|
|
GstVideoVBIEncoder *res;
|
|
|
|
g_return_val_if_fail (encoder != NULL, NULL);
|
|
|
|
res = gst_video_vbi_encoder_new (GST_VIDEO_INFO_FORMAT (&encoder->info),
|
|
encoder->info.width);
|
|
if (res) {
|
|
memcpy (res->work_data, encoder->work_data, encoder->work_data_size);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* gst_video_vbi_encoder_free:
|
|
* @encoder: a #GstVideoVBIEncoder
|
|
*
|
|
* Frees the @encoder.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
void
|
|
gst_video_vbi_encoder_free (GstVideoVBIEncoder * encoder)
|
|
{
|
|
g_return_if_fail (encoder != NULL);
|
|
|
|
g_free (encoder->work_data);
|
|
g_free (encoder);
|
|
}
|
|
|
|
/**
|
|
* gst_video_vbi_encoder_new:
|
|
* @format: a #GstVideoFormat
|
|
* @pixel_width: The width in pixel to use
|
|
*
|
|
* Create a new #GstVideoVBIEncoder for the specified @format and @pixel_width.
|
|
*
|
|
* Since: 1.16
|
|
*
|
|
* Returns: The new #GstVideoVBIEncoder or %NULL if the @format and/or @pixel_width
|
|
* is not supported.
|
|
*/
|
|
GstVideoVBIEncoder *
|
|
gst_video_vbi_encoder_new (GstVideoFormat format, guint32 pixel_width)
|
|
{
|
|
GstVideoVBIEncoder *encoder;
|
|
|
|
g_return_val_if_fail (pixel_width > 0, NULL);
|
|
|
|
switch (format) {
|
|
case GST_VIDEO_FORMAT_v210:
|
|
encoder = g_new0 (GstVideoVBIEncoder, 1);
|
|
encoder->bit16 = TRUE;
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
encoder = g_new0 (GstVideoVBIEncoder, 1);
|
|
encoder->bit16 = FALSE;
|
|
break;
|
|
default:
|
|
GST_WARNING ("Format not supported by GstVideoVBIEncoder");
|
|
return NULL;
|
|
}
|
|
|
|
gst_video_info_init (&encoder->info);
|
|
if (!gst_video_info_set_format (&encoder->info, format, pixel_width, 1)) {
|
|
GST_ERROR ("Could not create GstVideoInfo");
|
|
g_free (encoder);
|
|
return NULL;
|
|
}
|
|
|
|
/* Allocate the workspace which is going to be 2 * pixel_width big
|
|
* 2 : number of pixels per "component" (we only deal with 4:2:2)
|
|
* We use 1 or 2 bytes per pixel depending on whether we are internally
|
|
* working in 8 or 16bit */
|
|
encoder->work_data_size = 2 * pixel_width;
|
|
if (encoder->bit16)
|
|
encoder->work_data = g_malloc0 (encoder->work_data_size * 2);
|
|
else
|
|
encoder->work_data = g_malloc0 (encoder->work_data_size);
|
|
encoder->offset = 0;
|
|
|
|
return encoder;
|
|
}
|
|
|
|
#if G_GNUC_CHECK_VERSION(3,4)
|
|
static inline guint
|
|
parity (guint8 x)
|
|
{
|
|
return __builtin_parity (x);
|
|
}
|
|
#else
|
|
static guint
|
|
parity (guint8 x)
|
|
{
|
|
guint count = 0;
|
|
|
|
while (x) {
|
|
count += x & 1;
|
|
x >>= 1;
|
|
}
|
|
|
|
return count & 1;
|
|
}
|
|
#endif
|
|
|
|
/* Odd/even parity in the upper two bits */
|
|
#define SET_WITH_PARITY(buf, val) G_STMT_START { \
|
|
*(buf) = val; \
|
|
if (parity (val)) \
|
|
*(buf) |= 0x100; \
|
|
else \
|
|
*(buf) |= 0x200; \
|
|
} G_STMT_END;
|
|
|
|
/**
|
|
* gst_video_vbi_encoder_add_ancillary:
|
|
* @encoder: a #GstVideoVBIEncoder
|
|
* @composite: %TRUE if composite ADF should be created, component otherwise
|
|
* @DID: The Data Identifier
|
|
* @SDID_block_number: The Secondary Data Identifier (if type 2) or the Data
|
|
* Block Number (if type 1)
|
|
* @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.
|
|
*
|
|
* Stores Video Ancillary data, according to SMPTE-291M specification.
|
|
*
|
|
* Note that the contents of the data are always read as 8bit data (i.e. do not contain
|
|
* the parity check bits).
|
|
*
|
|
* Since: 1.16
|
|
*
|
|
* Returns: %TRUE if enough space was left in the current line, %FALSE
|
|
* otherwise.
|
|
*/
|
|
gboolean
|
|
gst_video_vbi_encoder_add_ancillary (GstVideoVBIEncoder * encoder,
|
|
gboolean composite, guint8 DID, guint8 SDID_block_number,
|
|
const guint8 * data, guint data_count)
|
|
{
|
|
g_return_val_if_fail (encoder != NULL, FALSE);
|
|
g_return_val_if_fail (data != NULL, FALSE);
|
|
g_return_val_if_fail (data_count < 256, FALSE);
|
|
|
|
/* Doesn't fit into this line anymore */
|
|
if (encoder->offset + data_count + (composite ? 5 : 7) >
|
|
encoder->work_data_size)
|
|
return FALSE;
|
|
|
|
if (encoder->bit16) {
|
|
guint16 *work_data = ((guint16 *) encoder->work_data) + encoder->offset;
|
|
guint i = 0, j;
|
|
guint checksum = 0;
|
|
|
|
/* Write ADF */
|
|
if (composite) {
|
|
work_data[i] = 0x3fc;
|
|
i += 1;
|
|
} else {
|
|
work_data[i] = 0x000;
|
|
work_data[i + 1] = 0x3ff;
|
|
work_data[i + 2] = 0x3ff;
|
|
i += 3;
|
|
}
|
|
|
|
SET_WITH_PARITY (&work_data[i], DID);
|
|
SET_WITH_PARITY (&work_data[i + 1], SDID_block_number);
|
|
SET_WITH_PARITY (&work_data[i + 2], data_count);
|
|
i += 3;
|
|
|
|
for (j = 0; j < data_count; j++)
|
|
SET_WITH_PARITY (&work_data[i + j], data[j]);
|
|
i += data_count;
|
|
|
|
for (j = (composite ? 1 : 3); j < i; j++)
|
|
checksum += work_data[j];
|
|
checksum &= 0x1ff;
|
|
checksum |= (!(checksum >> 8)) << 9;
|
|
|
|
work_data[i] = checksum;
|
|
i += 1;
|
|
|
|
encoder->offset += i;
|
|
} else {
|
|
guint8 *work_data = ((guint8 *) encoder->work_data) + encoder->offset;
|
|
guint i = 0, j;
|
|
guint checksum = 0;
|
|
|
|
/* Write ADF */
|
|
if (composite) {
|
|
work_data[i] = 0xfc;
|
|
i += 1;
|
|
} else {
|
|
work_data[i] = 0x00;
|
|
work_data[i + 1] = 0xff;
|
|
work_data[i + 2] = 0xff;
|
|
i += 3;
|
|
}
|
|
|
|
work_data[i] = DID;
|
|
work_data[i + 1] = SDID_block_number;
|
|
work_data[i + 2] = data_count;
|
|
i += 3;
|
|
|
|
for (j = 0; j < data_count; j++)
|
|
work_data[i + j] = data[j];
|
|
i += data_count;
|
|
|
|
for (j = (composite ? 1 : 3); j < i; j++)
|
|
checksum += work_data[j];
|
|
checksum &= 0xff;
|
|
|
|
work_data[i] = checksum;
|
|
i += 1;
|
|
|
|
encoder->offset += i;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
convert_line_to_v210 (GstVideoVBIEncoder * encoder, guint8 * data)
|
|
{
|
|
guint i;
|
|
const guint16 *y = (const guint16 *) encoder->work_data;
|
|
guint32 a, b, c, d;
|
|
|
|
/* Data is stored differently in SD, making no distinction between Y and UV */
|
|
if (encoder->info.width < 1280) {
|
|
/* Convert the line */
|
|
for (i = 0; i < encoder->info.width - 5; i += 6) {
|
|
a = ((y[0] & 0x3ff) << 0)
|
|
| ((y[1] & 0x3ff) << 10)
|
|
| ((y[2] & 0x3ff) << 20);
|
|
y += 3;
|
|
|
|
b = ((y[0] & 0x3ff) << 0)
|
|
| ((y[1] & 0x3ff) << 10)
|
|
| ((y[2] & 0x3ff) << 20);
|
|
y += 3;
|
|
|
|
c = ((y[0] & 0x3ff) << 0)
|
|
| ((y[1] & 0x3ff) << 10)
|
|
| ((y[2] & 0x3ff) << 20);
|
|
y += 3;
|
|
|
|
d = ((y[0] & 0x3ff) << 0)
|
|
| ((y[1] & 0x3ff) << 10)
|
|
| ((y[2] & 0x3ff) << 20);
|
|
y += 3;
|
|
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 0, a);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 4, b);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 8, c);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 12, d);
|
|
}
|
|
} else {
|
|
const guint16 *uv = y + encoder->info.width;
|
|
|
|
/* Convert the line */
|
|
for (i = 0; i < encoder->info.width - 5; i += 6) {
|
|
a = ((uv[0] & 0x3ff) << 0)
|
|
| ((y[0] & 0x3ff) << 10)
|
|
| ((uv[1] & 0x3ff) << 20);
|
|
uv += 2;
|
|
y++;
|
|
|
|
b = ((y[0] & 0x3ff) << 0)
|
|
| ((uv[0] & 0x3ff) << 10)
|
|
| ((y[1] & 0x3ff) << 20);
|
|
y += 2;
|
|
uv++;
|
|
|
|
c = ((uv[0] & 0x3ff) << 0)
|
|
| ((y[0] & 0x3ff) << 10)
|
|
| ((uv[1] & 0x3ff) << 20);
|
|
uv += 2;
|
|
y++;
|
|
|
|
d = ((y[0] & 0x3ff) << 0)
|
|
| ((uv[0] & 0x3ff) << 10)
|
|
| ((y[1] & 0x3ff) << 20);
|
|
y += 2;
|
|
uv++;
|
|
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 0, a);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 4, b);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 8, c);
|
|
GST_WRITE_UINT32_LE (data + (i / 6) * 16 + 12, d);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
convert_line_to_uyvy (GstVideoVBIEncoder * encoder, guint8 * data)
|
|
{
|
|
guint i;
|
|
const guint8 *y = encoder->work_data;
|
|
|
|
/* Data is stored differently in SD, making no distinction between Y and UV */
|
|
if (encoder->info.width < 1280) {
|
|
for (i = 0; i < encoder->info.width - 3; i += 4) {
|
|
data[(i / 4) * 4 + 0] = *y++;
|
|
data[(i / 4) * 4 + 1] = *y++;
|
|
data[(i / 4) * 4 + 2] = *y++;
|
|
data[(i / 4) * 4 + 3] = *y++;
|
|
}
|
|
} else {
|
|
const guint8 *uv = y + encoder->info.width;
|
|
|
|
for (i = 0; i < encoder->info.width - 3; i += 4) {
|
|
data[(i / 4) * 4 + 0] = *uv++;
|
|
data[(i / 4) * 4 + 1] = *y++;
|
|
data[(i / 4) * 4 + 2] = *uv++;
|
|
data[(i / 4) * 4 + 3] = *y++;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_video_vbi_encoder_write_line (GstVideoVBIEncoder * encoder, guint8 * data)
|
|
{
|
|
g_return_if_fail (encoder != NULL);
|
|
g_return_if_fail (data != NULL);
|
|
|
|
/* nothing to write? just exit early */
|
|
if (!encoder->offset)
|
|
return;
|
|
|
|
switch (GST_VIDEO_INFO_FORMAT (&encoder->info)) {
|
|
case GST_VIDEO_FORMAT_v210:
|
|
convert_line_to_v210 (encoder, data);
|
|
break;
|
|
case GST_VIDEO_FORMAT_UYVY:
|
|
convert_line_to_uyvy (encoder, data);
|
|
break;
|
|
default:
|
|
GST_ERROR ("UNSUPPORTED FORMAT !");
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
encoder->offset = 0;
|
|
memset (encoder->work_data, 0,
|
|
encoder->work_data_size * (encoder->bit16 ? 2 : 1));
|
|
}
|
|
|
|
/* Closed Caption Meta implementation *******************************************/
|
|
|
|
GType
|
|
gst_video_caption_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
static const gchar *tags[] = { NULL };
|
|
GType _type = gst_meta_api_type_register ("GstVideoCaptionMetaAPI", tags);
|
|
GST_INFO ("registering");
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
|
|
static gboolean
|
|
gst_video_caption_meta_transform (GstBuffer * dest, GstMeta * meta,
|
|
GstBuffer * buffer, GQuark type, gpointer data)
|
|
{
|
|
GstVideoCaptionMeta *dmeta, *smeta;
|
|
|
|
/* We always copy over the caption meta */
|
|
smeta = (GstVideoCaptionMeta *) meta;
|
|
|
|
GST_DEBUG ("copy caption metadata");
|
|
dmeta =
|
|
gst_buffer_add_video_caption_meta (dest, smeta->caption_type,
|
|
smeta->data, smeta->size);
|
|
if (!dmeta)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_caption_meta_init (GstMeta * meta, gpointer params,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
|
|
|
|
emeta->caption_type = GST_VIDEO_CAPTION_TYPE_UNKNOWN;
|
|
emeta->data = NULL;
|
|
emeta->size = 0;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_video_caption_meta_free (GstMeta * meta, GstBuffer * buffer)
|
|
{
|
|
GstVideoCaptionMeta *emeta = (GstVideoCaptionMeta *) meta;
|
|
|
|
g_free (emeta->data);
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_video_caption_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
|
|
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_CAPTION_META_API_TYPE,
|
|
"GstVideoCaptionMeta",
|
|
sizeof (GstVideoCaptionMeta),
|
|
gst_video_caption_meta_init,
|
|
gst_video_caption_meta_free,
|
|
gst_video_caption_meta_transform);
|
|
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_video_caption_meta:
|
|
* @buffer: a #GstBuffer
|
|
* @caption_type: The type of Closed Caption to add
|
|
* @data: (array length=size) (transfer none): The Closed Caption data
|
|
* @size: The size of @data in bytes
|
|
*
|
|
* Attaches #GstVideoCaptionMeta metadata to @buffer with the given
|
|
* parameters.
|
|
*
|
|
* Returns: (transfer none): the #GstVideoCaptionMeta on @buffer.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
GstVideoCaptionMeta *
|
|
gst_buffer_add_video_caption_meta (GstBuffer * buffer,
|
|
GstVideoCaptionType caption_type, const guint8 * data, gsize size)
|
|
{
|
|
GstVideoCaptionMeta *meta;
|
|
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
g_return_val_if_fail (data != NULL, NULL);
|
|
g_return_val_if_fail (size > 0, NULL);
|
|
|
|
switch (caption_type) {
|
|
case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:
|
|
case GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A:
|
|
case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:
|
|
case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:
|
|
break;
|
|
default:
|
|
GST_ERROR ("Unknown caption type !");
|
|
return NULL;
|
|
}
|
|
/* FIXME : Add checks for content ? */
|
|
|
|
meta = (GstVideoCaptionMeta *) gst_buffer_add_meta (buffer,
|
|
GST_VIDEO_CAPTION_META_INFO, NULL);
|
|
g_return_val_if_fail (meta != NULL, NULL);
|
|
|
|
meta->caption_type = caption_type;
|
|
meta->data = g_memdup (data, size);
|
|
meta->size = size;
|
|
|
|
return meta;
|
|
}
|
|
|
|
/**
|
|
* gst_video_caption_type_from_caps:
|
|
* @caps: Fixed #GstCaps to parse
|
|
*
|
|
* Parses fixed Closed Caption #GstCaps and returns the corresponding caption
|
|
* type, or %GST_VIDEO_CAPTION_TYPE_UNKNOWN.
|
|
*
|
|
* Returns: #GstVideoCaptionType.
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
GstVideoCaptionType
|
|
gst_video_caption_type_from_caps (const GstCaps * caps)
|
|
{
|
|
const GstStructure *s;
|
|
const gchar *format;
|
|
|
|
g_return_val_if_fail (gst_caps_is_fixed (caps),
|
|
GST_VIDEO_CAPTION_TYPE_UNKNOWN);
|
|
|
|
s = gst_caps_get_structure (caps, 0);
|
|
g_return_val_if_fail (s != NULL, GST_VIDEO_CAPTION_TYPE_UNKNOWN);
|
|
|
|
format = gst_structure_get_string (s, "format");
|
|
if (gst_structure_has_name (s, "closedcaption/x-cea-608")) {
|
|
if (g_strcmp0 (format, "raw") == 0) {
|
|
return GST_VIDEO_CAPTION_TYPE_CEA608_RAW;
|
|
} else if (g_strcmp0 (format, "s334-1a") == 0) {
|
|
return GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A;
|
|
}
|
|
} else if (gst_structure_has_name (s, "closedcaption/x-cea-708")) {
|
|
if (g_strcmp0 (format, "cc_data") == 0) {
|
|
return GST_VIDEO_CAPTION_TYPE_CEA708_RAW;
|
|
} else if (g_strcmp0 (format, "cdp") == 0) {
|
|
return GST_VIDEO_CAPTION_TYPE_CEA708_CDP;
|
|
}
|
|
}
|
|
return GST_VIDEO_CAPTION_TYPE_UNKNOWN;
|
|
}
|
|
|
|
/**
|
|
* gst_video_caption_type_to_caps:
|
|
* @type: #GstVideoCaptionType
|
|
*
|
|
* Creates new caps corresponding to @type.
|
|
*
|
|
* Returns: (transfer full): new #GstCaps
|
|
*
|
|
* Since: 1.16
|
|
*/
|
|
GstCaps *
|
|
gst_video_caption_type_to_caps (GstVideoCaptionType type)
|
|
{
|
|
GstCaps *caption_caps;
|
|
|
|
g_return_val_if_fail (type != GST_VIDEO_CAPTION_TYPE_UNKNOWN, NULL);
|
|
|
|
switch (type) {
|
|
case GST_VIDEO_CAPTION_TYPE_CEA608_RAW:
|
|
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-608",
|
|
"format", G_TYPE_STRING, "raw", NULL);
|
|
break;
|
|
case GST_VIDEO_CAPTION_TYPE_CEA608_S334_1A:
|
|
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-608",
|
|
"format", G_TYPE_STRING, "s334-1a", NULL);
|
|
break;
|
|
case GST_VIDEO_CAPTION_TYPE_CEA708_RAW:
|
|
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-708",
|
|
"format", G_TYPE_STRING, "cc_data", NULL);
|
|
break;
|
|
case GST_VIDEO_CAPTION_TYPE_CEA708_CDP:
|
|
caption_caps = gst_caps_new_simple ("closedcaption/x-cea-708",
|
|
"format", G_TYPE_STRING, "cdp", NULL);
|
|
break;
|
|
default:
|
|
g_return_val_if_reached (NULL);
|
|
break;
|
|
}
|
|
|
|
return caption_caps;
|
|
}
|
|
|
|
/* Active Format Description (AFD) Meta implementation */
|
|
|
|
GType
|
|
gst_video_afd_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
static const gchar *tags[] = {
|
|
GST_META_TAG_VIDEO_SIZE_STR,
|
|
GST_META_TAG_VIDEO_ORIENTATION_STR,
|
|
GST_META_TAG_VIDEO_STR
|
|
};
|
|
GType _type = gst_meta_api_type_register ("GstVideoAFDMetaAPI", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
static gboolean
|
|
gst_video_afd_meta_init (GstMeta * meta, gpointer params, GstBuffer * buffer)
|
|
{
|
|
GstVideoAFDMeta *emeta = (GstVideoAFDMeta *) meta;
|
|
|
|
emeta->field = 0;
|
|
emeta->spec = GST_VIDEO_AFD_SPEC_ATSC_A53;
|
|
emeta->afd = GST_VIDEO_AFD_UNAVAILABLE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_video_afd_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
|
|
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_AFD_META_API_TYPE,
|
|
"GstVideoAFDMeta",
|
|
sizeof (GstVideoAFDMeta),
|
|
gst_video_afd_meta_init,
|
|
NULL,
|
|
NULL);
|
|
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_video_afd_meta:
|
|
* @buffer: a #GstBuffer
|
|
* @field: 0 for progressive or field 1 and 1 for field 2
|
|
* @spec: #GstVideoAFDSpec that applies to AFD value
|
|
* @afd: #GstVideoAFDValue AFD enumeration
|
|
*
|
|
* Attaches #GstVideoAFDMeta metadata to @buffer with the given
|
|
* parameters.
|
|
*
|
|
* Returns: (transfer none): the #GstVideoAFDMeta on @buffer.
|
|
*
|
|
* Since: 1.18
|
|
*/
|
|
GstVideoAFDMeta *
|
|
gst_buffer_add_video_afd_meta (GstBuffer * buffer, guint8 field,
|
|
GstVideoAFDSpec spec, GstVideoAFDValue afd)
|
|
{
|
|
GstVideoAFDMeta *meta;
|
|
gint8 afd_data = (gint8) afd;
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
g_return_val_if_fail (field <= 1, NULL);
|
|
g_return_val_if_fail ((guint8) spec <= 2, NULL);
|
|
/* AFD is stored in a nybble */
|
|
g_return_val_if_fail (afd_data <= 0xF, NULL);
|
|
/* reserved values for all specifications */
|
|
g_return_val_if_fail (afd_data != 1 && (afd_data < 5 || afd_data > 7)
|
|
&& afd_data != 12, NULL);
|
|
/* reserved for DVB/ETSI */
|
|
g_return_val_if_fail ((spec != GST_VIDEO_AFD_SPEC_DVB_ETSI)
|
|
|| (afd_data != 0), NULL);
|
|
|
|
meta = (GstVideoAFDMeta *) gst_buffer_add_meta (buffer,
|
|
GST_VIDEO_AFD_META_INFO, NULL);
|
|
g_assert (meta != NULL);
|
|
|
|
meta->field = field;
|
|
meta->spec = spec;
|
|
meta->afd = afd;
|
|
|
|
return meta;
|
|
}
|
|
|
|
/* Bar Meta implementation */
|
|
|
|
GType
|
|
gst_video_bar_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
static const gchar *tags[] = {
|
|
GST_META_TAG_VIDEO_SIZE_STR,
|
|
GST_META_TAG_VIDEO_ORIENTATION_STR,
|
|
GST_META_TAG_VIDEO_STR
|
|
};
|
|
GType _type = gst_meta_api_type_register ("GstVideoBarMetaAPI", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_video_bar_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
|
|
const GstMetaInfo *mi = gst_meta_register (GST_VIDEO_BAR_META_API_TYPE,
|
|
"GstVideoBarMeta",
|
|
sizeof (GstVideoBarMeta),
|
|
NULL,
|
|
NULL,
|
|
NULL);
|
|
g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_video_bar_meta:
|
|
* @buffer: a #GstBuffer
|
|
* @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.
|
|
*
|
|
* Attaches #GstVideoBarMeta metadata to @buffer with the given
|
|
* parameters.
|
|
*
|
|
* Returns: (transfer none): the #GstVideoBarMeta on @buffer.
|
|
*
|
|
* See Table 6.11 Bar Data Syntax
|
|
*
|
|
* https://www.atsc.org/wp-content/uploads/2015/03/a_53-Part-4-2009.pdf
|
|
*
|
|
* Since: 1.18
|
|
*/
|
|
GstVideoBarMeta *
|
|
gst_buffer_add_video_bar_meta (GstBuffer * buffer, guint8 field,
|
|
gboolean is_letterbox, guint bar_data1, guint bar_data2)
|
|
{
|
|
GstVideoBarMeta *meta;
|
|
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
g_return_val_if_fail (field <= 1, NULL);
|
|
|
|
meta = (GstVideoBarMeta *) gst_buffer_add_meta (buffer,
|
|
GST_VIDEO_BAR_META_INFO, NULL);
|
|
g_assert (meta != NULL);
|
|
|
|
meta->field = field;
|
|
meta->is_letterbox = is_letterbox;
|
|
meta->bar_data1 = bar_data1;
|
|
meta->bar_data2 = bar_data2;
|
|
return meta;
|
|
}
|