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76f1ed15fb
Expose SEI data in the H.264 bitstream parser API and extract closed captions and other things that are not specified in the H.264 spec itself in the videoparser. Based on patch by: Mathieu Duponchelle <mathieu@centricular.com> https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/issues/940
157 lines
4.3 KiB
C
157 lines
4.3 KiB
C
/* GStreamer H.264 Parser
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* Copyright (C) <2010> Collabora ltd
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* Copyright (C) <2010> Nokia Corporation
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* Copyright (C) <2011> Intel Corporation
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*
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* Copyright (C) <2010> Mark Nauwelaerts <mark.nauwelaerts@collabora.co.uk>
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* Copyright (C) <2011> Thibault Saunier <thibault.saunier@collabora.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_H264_PARSE_H__
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#define __GST_H264_PARSE_H__
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#include <gst/gst.h>
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#include <gst/base/gstbaseparse.h>
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#include <gst/codecparsers/gsth264parser.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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typedef struct _H264Params H264Params;
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#define GST_TYPE_H264_PARSE \
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(gst_h264_parse_get_type())
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#define GST_H264_PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_H264_PARSE,GstH264Parse))
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#define GST_H264_PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_H264_PARSE,GstH264ParseClass))
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#define GST_IS_H264_PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_H264_PARSE))
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#define GST_IS_H264_PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_H264_PARSE))
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GType gst_h264_parse_get_type (void);
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typedef struct _GstH264Parse GstH264Parse;
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typedef struct _GstH264ParseClass GstH264ParseClass;
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struct _GstH264Parse
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{
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GstBaseParse baseparse;
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/* stream */
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gint width, height;
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gint fps_num, fps_den;
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gint upstream_par_n, upstream_par_d;
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gint parsed_par_n, parsed_par_d;
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gint parsed_fps_n, parsed_fps_d;
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/* current codec_data in output caps, if any */
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GstBuffer *codec_data;
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/* input codec_data, if any */
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GstBuffer *codec_data_in;
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guint nal_length_size;
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gboolean packetized;
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gboolean split_packetized;
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gboolean transform;
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/* state */
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GstH264NalParser *nalparser;
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guint state;
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guint in_align;
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guint align;
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guint format;
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gint current_off;
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/* True if input format and alignment match negotiated output */
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gboolean can_passthrough;
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GstClockTime last_report;
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gboolean push_codec;
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/* The following variables have a meaning in context of "have
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* SPS/PPS to push downstream", e.g. to update caps */
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gboolean have_sps;
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gboolean have_pps;
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/* per frame sps/pps check for periodic push codec decision */
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gboolean have_sps_in_frame;
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gboolean have_pps_in_frame;
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gboolean sent_codec_tag;
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/* collected SPS and PPS NALUs */
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GstBuffer *sps_nals[GST_H264_MAX_SPS_COUNT];
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GstBuffer *pps_nals[GST_H264_MAX_PPS_COUNT];
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/* collected SEI timestamps */
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guint num_clock_timestamp;
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GstH264ClockTimestamp clock_timestamp[3];
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/* Infos we need to keep track of */
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guint32 sei_cpb_removal_delay;
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guint8 sei_pic_struct;
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guint8 sei_pic_struct_pres_flag;
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guint field_pic_flag;
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/* cached timestamps */
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/* (trying to) track upstream dts and interpolate */
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GstClockTime dts;
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/* dts at start of last buffering period */
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GstClockTime ts_trn_nb;
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gboolean do_ts;
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gboolean discont;
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/* frame parsing */
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/*guint last_nal_pos;*/
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/*guint next_sc_pos;*/
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gint idr_pos, sei_pos;
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gboolean update_caps;
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GstAdapter *frame_out;
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gboolean keyframe;
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gboolean header;
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gboolean frame_start;
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/* AU state */
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gboolean picture_start;
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/* props */
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gint interval;
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GstClockTime pending_key_unit_ts;
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GstEvent *force_key_unit_event;
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/* Stereo / multiview info */
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GstVideoMultiviewMode multiview_mode;
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GstVideoMultiviewFlags multiview_flags;
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gboolean first_in_bundle;
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/* For insertion of AU Delimiter */
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gboolean aud_needed;
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gboolean aud_insert;
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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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};
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struct _GstH264ParseClass
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{
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GstBaseParseClass parent_class;
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};
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G_END_DECLS
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#endif
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