gstreamer/gst/h264parse/gsth264parse.h
2011-05-18 13:38:09 -07:00

154 lines
3.9 KiB
C

/* GStreamer h264 parser
* Copyright (C) 2005 Michal Benes <michal.benes@itonis.tv>
*
* gsth264parse.h:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_H264_PARSE_H__
#define __GST_H264_PARSE_H__
#include <gst/gst.h>
#include <gst/base/gstadapter.h>
G_BEGIN_DECLS
#define GST_TYPE_H264PARSE \
(gst_h264_parse_get_type())
#define GST_H264PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_H264PARSE,GstH264Parse))
#define GST_H264PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_H264PARSE,GstH264ParseClass))
#define GST_IS_H264PARSE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_H264PARSE))
#define GST_IS_H264PARSE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_H264PARSE))
typedef struct _GstH264Parse GstH264Parse;
typedef struct _GstH264ParseClass GstH264ParseClass;
typedef struct _GstNalList GstNalList;
typedef struct _GstH264Sps GstH264Sps;
typedef struct _GstH264Pps GstH264Pps;
#define MAX_SPS_COUNT 32
#define MAX_PPS_COUNT 256
#define CLOCK_BASE 9LL
#define CLOCK_FREQ (CLOCK_BASE * 10000)
#define MPEGTIME_TO_GSTTIME(time) (gst_util_uint64_scale ((time), \
GST_MSECOND/10, CLOCK_BASE))
#define GSTTIME_TO_MPEGTIME(time) (gst_util_uint64_scale ((time), \
CLOCK_BASE, GST_MSECOND/10))
struct _GstH264Parse
{
GstElement element;
GstPad *sinkpad;
GstPad *srcpad;
gboolean split_packetized;
gboolean merge;
guint nal_length_size;
guint format;
guint interval;
GstClockTime last_report;
GstSegment segment;
gboolean packetized;
gboolean discont;
gint width, height;
gint fps_num, fps_den;
/* gather/decode queues for reverse playback */
GList *gather;
GstBuffer *prev;
GstNalList *decode;
gint decode_len;
gboolean have_sps;
gboolean have_pps;
gboolean have_i_frame;
GstAdapter *adapter;
/* SPS: sequential parameter set */
GstH264Sps *sps_buffers[MAX_SPS_COUNT];
GstH264Sps *sps; /* Current SPS */
/* PPS: sequential parameter set */
GstH264Pps *pps_buffers[MAX_PPS_COUNT];
GstH264Pps *pps; /* Current PPS */
/* slice header */
guint8 first_mb_in_slice;
guint8 slice_type;
guint8 pps_id;
guint32 frame_num;
gboolean field_pic_flag;
gboolean bottom_field_flag;
/* SEI: supplemental enhancement messages */
/* buffering period */
guint32 initial_cpb_removal_delay[32];
/* picture timing */
guint32 sei_cpb_removal_delay;
guint32 sei_dpb_output_delay;
guint8 sei_pic_struct;
guint8 sei_ct_type;
/* And more... */
/* cached timestamps */
GstClockTime dts;
GstClockTime last_outbuf_dts;
GstClockTime ts_trn_nb; /* dts of last buffering period */
GstClockTime cur_duration; /* duration of the current access unit */
/* for debug purpose */
guint32 frame_cnt;
/* NALU AU */
GstAdapter *picture_adapter;
gboolean picture_start;
gint idr_offset;
/* codec data NALUs to be inserted into stream */
GSList *codec_nals;
/* SPS and PPS NALUs collected from stream to form codec_data in caps */
GstBuffer *sps_nals[MAX_SPS_COUNT];
GstBuffer *pps_nals[MAX_PPS_COUNT];
GstCaps *src_caps;
GstEvent *pending_segment;
GList *pending_events;
};
struct _GstH264ParseClass
{
GstElementClass parent_class;
};
GType gst_h264_parse_get_type (void);
G_END_DECLS
#endif /* __GST_H264_PARSE_H__ */