mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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80dd130fb0
This reverts commit e14e310f71.
Would be better move the packetizer flushing to FLUSH_STOP and avoid
the race that way. Without introducing a memory barrier that could
have impact in the performance.
206 lines
6.9 KiB
C
206 lines
6.9 KiB
C
/*
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* mpegtsbase.h - GStreamer MPEG transport stream base class
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2007 Alessandro Decina
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* Copyright (C) 2011, Hewlett-Packard Development Company, L.P.
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* Author: Youness Alaoui <youness.alaoui@collabora.co.uk>, Collabora Ltd.
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* Author: Sebastian Dröge <sebastian.droege@collabora.co.uk>, Collabora Ltd.
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*
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* Authors:
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* Alessandro Decina <alessandro@nnva.org>
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* Edward Hervey <edward.hervey@collabora.co.uk>
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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_MPEG_TS_BASE_H
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#define GST_MPEG_TS_BASE_H
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#include <gst/gst.h>
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#include "mpegtspacketizer.h"
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G_BEGIN_DECLS
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#define GST_TYPE_MPEGTS_BASE \
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(mpegts_base_get_type())
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#define GST_MPEGTS_BASE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MPEGTS_BASE,MpegTSBase))
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#define GST_MPEGTS_BASE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MPEGTS_BASE,MpegTSBaseClass))
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#define GST_IS_MPEGTS_BASE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MPEGTS_BASE))
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#define GST_IS_MPEGTS_BASE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MPEGTS_BASE))
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#define GST_MPEGTS_BASE_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_MPEGTS_BASE, MpegTSBaseClass))
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#define MPEG_TS_BASE_PACKETIZER(b) (((MpegTSBase*)b)->packetizer)
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typedef struct _MpegTSBase MpegTSBase;
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typedef struct _MpegTSBaseClass MpegTSBaseClass;
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typedef struct _MpegTSBaseStream MpegTSBaseStream;
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typedef struct _MpegTSBaseProgram MpegTSBaseProgram;
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struct _MpegTSBaseStream
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{
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guint16 pid;
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guint8 stream_type;
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GstStructure* stream_info;
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};
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struct _MpegTSBaseProgram
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{
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gint program_number;
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guint16 pmt_pid;
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guint16 pcr_pid;
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GstStructure *pmt_info;
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MpegTSBaseStream **streams;
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GList *stream_list;
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gint patcount;
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/* Pending Tags for the program */
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GstTagList *tags;
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guint event_id;
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/* TRUE if the program is currently being used */
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gboolean active;
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/* TRUE if this is the first program created */
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gboolean initial_program;
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};
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typedef enum {
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/* PULL MODE */
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BASE_MODE_SCANNING, /* Looking for PAT/PMT */
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BASE_MODE_SEEKING, /* Seeking */
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BASE_MODE_STREAMING, /* Normal mode (pushing out data) */
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/* PUSH MODE */
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BASE_MODE_PUSHING
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} MpegTSBaseMode;
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struct _MpegTSBase {
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GstElement element;
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GstPad *sinkpad;
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/* pull-based behaviour */
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MpegTSBaseMode mode;
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/* Current pull offset (also set by seek handler) */
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guint64 seek_offset;
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/* Cached packetsize */
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guint16 packetsize;
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/* the following vars must be protected with the OBJECT_LOCK as they can be
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* accessed from the application thread and the streaming thread */
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GHashTable *programs;
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GstStructure *pat;
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MpegTSPacketizer2 *packetizer;
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/* arrays that say whether a pid is a known psi pid or a pes pid */
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/* Use MPEGTS_BIT_* to set/unset/check the values */
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guint8 *known_psi;
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guint8 *is_pes;
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gboolean disposed;
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/* size of the MpegTSBaseProgram structure, can be overridden
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* by subclasses if they have their own MpegTSBaseProgram subclasses. */
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gsize program_size;
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/* size of the MpegTSBaseStream structure, can be overridden
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* by subclasses if they have their own MpegTSBaseStream subclasses */
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gsize stream_size;
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/* Whether we saw a PAT yet */
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gboolean seen_pat;
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/* Whether upstream is live or not */
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gboolean upstream_live;
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/* Whether we queried the upstream latency or not */
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gboolean queried_latency;
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/* Upstream segment */
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GstSegment segment;
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};
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struct _MpegTSBaseClass {
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GstElementClass parent_class;
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/* Virtual methods */
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void (*reset) (MpegTSBase *base);
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GstFlowReturn (*push) (MpegTSBase *base, MpegTSPacketizerPacket *packet, MpegTSPacketizerSection * section);
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/* takes ownership of @event */
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gboolean (*push_event) (MpegTSBase *base, GstEvent * event);
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/* program_started gets called when program's pmt arrives for first time */
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void (*program_started) (MpegTSBase *base, MpegTSBaseProgram *program);
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/* program_stopped gets called when pat no longer has program's pmt */
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void (*program_stopped) (MpegTSBase *base, MpegTSBaseProgram *program);
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/* stream_added is called whenever a new stream has been identified */
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void (*stream_added) (MpegTSBase *base, MpegTSBaseStream *stream, MpegTSBaseProgram *program);
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/* stream_removed is called whenever a stream is no longer referenced */
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void (*stream_removed) (MpegTSBase *base, MpegTSBaseStream *stream);
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/* find_timestamps is called to find PCR */
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GstFlowReturn (*find_timestamps) (MpegTSBase * base, guint64 initoff, guint64 *offset);
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/* seek is called to wait for seeking */
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GstFlowReturn (*seek) (MpegTSBase * base, GstEvent * event);
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/* flush all streams */
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void (*flush) (MpegTSBase * base);
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/* Notifies subclasses input buffer has been handled */
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GstFlowReturn (*input_done) (MpegTSBase *base, GstBuffer *buffer);
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/* signals */
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void (*pat_info) (GstStructure *pat);
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void (*pmt_info) (GstStructure *pmt);
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void (*nit_info) (GstStructure *nit);
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void (*sdt_info) (GstStructure *sdt);
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void (*eit_info) (GstStructure *eit);
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};
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#define MPEGTS_BIT_SET(field, offs) ((field)[(offs) >> 3] |= (1 << ((offs) & 0x7)))
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#define MPEGTS_BIT_UNSET(field, offs) ((field)[(offs) >> 3] &= ~(1 << ((offs) & 0x7)))
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#define MPEGTS_BIT_IS_SET(field, offs) ((field)[(offs) >> 3] & (1 << ((offs) & 0x7)))
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G_GNUC_INTERNAL GType mpegts_base_get_type(void);
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G_GNUC_INTERNAL MpegTSBaseProgram *mpegts_base_get_program (MpegTSBase * base, gint program_number);
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G_GNUC_INTERNAL MpegTSBaseProgram *mpegts_base_add_program (MpegTSBase * base, gint program_number, guint16 pmt_pid);
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G_GNUC_INTERNAL guint8 *mpegts_get_descriptor_from_stream (MpegTSBaseStream * stream, guint8 tag);
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G_GNUC_INTERNAL guint8 *mpegts_get_descriptor_from_program (MpegTSBaseProgram * program, guint8 tag);
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G_GNUC_INTERNAL gboolean
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mpegts_base_handle_seek_event(MpegTSBase * base, GstPad * pad, GstEvent * event);
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G_GNUC_INTERNAL gboolean gst_mpegtsbase_plugin_init (GstPlugin * plugin);
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G_GNUC_INTERNAL gboolean mpegts_base_handle_psi (MpegTSBase * base, MpegTSPacketizerSection * section);
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G_GNUC_INTERNAL void mpegts_base_program_remove_stream (MpegTSBase * base, MpegTSBaseProgram * program, guint16 pid);
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G_GNUC_INTERNAL void mpegts_base_remove_program(MpegTSBase *base, gint program_number);
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G_END_DECLS
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#endif /* GST_MPEG_TS_BASE_H */
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