mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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92e7e3a3bf
If the input alignment claims AU alignment, each received buffer should contain a complete video frame, so never hold over parts of buffers for later processing. Also reduces latency, as packets are parsed/converted and output immediately instead of 1 buffer later. Fixes a problem where an (arguably disallowed) padding byte on the end of a buffer is detected as an extra byte in the following start code, and messes up the timestamping that should apply to that start code.
139 lines
3.8 KiB
C
139 lines
3.8 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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/* 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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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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/* 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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};
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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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