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154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/* GStreamer h264 parser
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* Copyright (C) 2005 Michal Benes <michal.benes@itonis.tv>
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*
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* gsth264parse.h:
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, 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/gstadapter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_H264PARSE \
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(gst_h264_parse_get_type())
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#define GST_H264PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_H264PARSE,GstH264Parse))
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#define GST_H264PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_H264PARSE,GstH264ParseClass))
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#define GST_IS_H264PARSE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_H264PARSE))
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#define GST_IS_H264PARSE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_H264PARSE))
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typedef struct _GstH264Parse GstH264Parse;
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typedef struct _GstH264ParseClass GstH264ParseClass;
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typedef struct _GstNalList GstNalList;
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typedef struct _GstH264Sps GstH264Sps;
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typedef struct _GstH264Pps GstH264Pps;
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#define MAX_SPS_COUNT 32
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#define MAX_PPS_COUNT 256
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#define CLOCK_BASE 9LL
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#define CLOCK_FREQ (CLOCK_BASE * 10000)
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#define MPEGTIME_TO_GSTTIME(time) (gst_util_uint64_scale ((time), \
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GST_MSECOND/10, CLOCK_BASE))
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#define GSTTIME_TO_MPEGTIME(time) (gst_util_uint64_scale ((time), \
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CLOCK_BASE, GST_MSECOND/10))
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struct _GstH264Parse
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{
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GstElement element;
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GstPad *sinkpad;
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GstPad *srcpad;
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gboolean split_packetized;
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gboolean merge;
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guint nal_length_size;
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guint format;
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guint interval;
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GstClockTime last_report;
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GstSegment segment;
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gboolean packetized;
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gboolean discont;
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gint width, height;
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gint fps_num, fps_den;
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/* gather/decode queues for reverse playback */
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GList *gather;
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GstBuffer *prev;
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GstNalList *decode;
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gint decode_len;
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gboolean have_sps;
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gboolean have_pps;
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gboolean have_i_frame;
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GstAdapter *adapter;
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/* SPS: sequential parameter set */
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GstH264Sps *sps_buffers[MAX_SPS_COUNT];
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GstH264Sps *sps; /* Current SPS */
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/* PPS: sequential parameter set */
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GstH264Pps *pps_buffers[MAX_PPS_COUNT];
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GstH264Pps *pps; /* Current PPS */
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/* slice header */
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guint8 first_mb_in_slice;
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guint8 slice_type;
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guint8 pps_id;
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guint32 frame_num;
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gboolean field_pic_flag;
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gboolean bottom_field_flag;
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/* SEI: supplemental enhancement messages */
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/* buffering period */
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guint32 initial_cpb_removal_delay[32];
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/* picture timing */
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guint32 sei_cpb_removal_delay;
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guint32 sei_dpb_output_delay;
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guint8 sei_pic_struct;
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guint8 sei_ct_type;
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/* And more... */
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/* cached timestamps */
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GstClockTime dts;
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GstClockTime last_outbuf_dts;
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GstClockTime ts_trn_nb; /* dts of last buffering period */
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GstClockTime cur_duration; /* duration of the current access unit */
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/* for debug purpose */
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guint32 frame_cnt;
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/* NALU AU */
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GstAdapter *picture_adapter;
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gboolean picture_start;
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gint idr_offset;
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/* codec data NALUs to be inserted into stream */
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GSList *codec_nals;
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/* SPS and PPS NALUs collected from stream to form codec_data in caps */
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GstBuffer *sps_nals[MAX_SPS_COUNT];
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GstBuffer *pps_nals[MAX_PPS_COUNT];
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GstCaps *src_caps;
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GstEvent *pending_segment;
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GList *pending_events;
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};
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struct _GstH264ParseClass
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{
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GstElementClass parent_class;
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};
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GType gst_h264_parse_get_type (void);
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G_END_DECLS
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#endif /* __GST_H264_PARSE_H__ */
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