gstreamer/gst/mpegtsmux/gstbasetsmux.h
Jan Alexander Steffens (heftig) 66f9d37c37 mpegtsmux: Make handling of sinkpads thread-safe
Ensure we take the object lock while accessing `GstElement.sinkpads`.
Use an iterator when the code isn't simple to avoid deadlock.

When we find the best pad, take a reference so a concurrent pad
release doesn't destroy the pad before we're done with it.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1553>
2020-09-09 02:25:40 +00:00

272 lines
9.2 KiB
C

/*
* Copyright 2006, 2007, 2008, 2009, 2010 Fluendo S.A.
* Authors: Jan Schmidt <jan@fluendo.com>
* Kapil Agrawal <kapil@fluendo.com>
* Julien Moutte <julien@fluendo.com>
*
* This library is licensed under 4 different licenses and you
* can choose to use it under the terms of any one of them. The
* four licenses are the MPL 1.1, the LGPL, the GPL and the MIT
* license.
*
* MPL:
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
* License for the specific language governing rights and limitations
* under the License.
*
* LGPL:
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* GPL:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
*
* MIT:
*
* Unless otherwise indicated, Source Code is licensed under MIT license.
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* LICENSE).
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
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* SOFTWARE.
*
*/
#ifndef __BASETSMUX_H__
#define __BASETSMUX_H__
#include <gst/gst.h>
#include <gst/base/gstcollectpads.h>
#include <gst/base/gstadapter.h>
#include <gst/base/gstaggregator.h>
G_BEGIN_DECLS
#include "tsmux/tsmux.h"
#define GST_TYPE_BASE_TS_MUX_PAD (gst_base_ts_mux_pad_get_type())
#define GST_BASE_TS_MUX_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASE_TS_MUX_PAD, GstBaseTsMuxPad))
#define GST_BASE_TS_MUX_PAD_CAST(obj) ((GstBaseTsMuxPad *)(obj))
#define GST_BASE_TS_MUX_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASE_TS_MUX_PAD, GstBaseTsMuxPadClass))
#define GST_IS_BASE_TS_MUX_PAD(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASE_TS_MUX_PAD))
#define GST_IS_BASE_TS_MUX_PAD_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASE_TS_MUX_PAD))
#define GST_BASE_TS_MUX_PAD_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_BASE_TS_MUX_PAD,GstBaseTsMuxPadClass))
typedef struct _GstBaseTsMuxPad GstBaseTsMuxPad;
typedef struct _GstBaseTsMuxPadClass GstBaseTsMuxPadClass;
typedef struct _GstBaseTsMuxPadPrivate GstBaseTsMuxPadPrivate;
typedef struct GstBaseTsMux GstBaseTsMux;
typedef struct GstBaseTsMuxClass GstBaseTsMuxClass;
typedef struct GstBaseTsPadData GstBaseTsPadData;
typedef GstBuffer * (*GstBaseTsMuxPadPrepareFunction) (GstBuffer * buf,
GstBaseTsMuxPad * data, GstBaseTsMux * mux);
typedef void (*GstBaseTsMuxPadFreePrepareDataFunction) (gpointer prepare_data);
struct _GstBaseTsMuxPad
{
GstAggregatorPad parent;
gint pid;
TsMuxStream *stream;
/* most recent DTS */
gint64 dts;
/* optional codec data available in the caps */
GstBuffer *codec_data;
/* Opaque data pointer to a structure used by the prepare function */
gpointer prepare_data;
/* handler to prepare input data */
GstBaseTsMuxPadPrepareFunction prepare_func;
/* handler to free the private data */
GstBaseTsMuxPadFreePrepareDataFunction free_func;
/* program id to which it is attached to (not program pid) */
gint prog_id;
/* program this stream belongs to */
TsMuxProgram *prog;
gchar *language;
};
struct _GstBaseTsMuxPadClass
{
GstAggregatorPadClass parent_class;
};
GType gst_base_ts_mux_pad_get_type (void);
#define GST_TYPE_BASE_TS_MUX (gst_base_ts_mux_get_type())
#define GST_BASE_TS_MUX(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_BASE_TS_MUX, GstBaseTsMux))
#define GST_BASE_TS_MUX_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BASE_TS_MUX, GstBaseTsMuxClass))
#define GST_BASE_TS_MUX_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj),GST_TYPE_BASE_TS_MUX,GstBaseTsMuxClass))
#define GST_BASE_TS_MUX_NORMAL_PACKET_LENGTH 188
struct GstBaseTsMux {
GstAggregator parent;
TsMux *tsmux;
GHashTable *programs;
/* properties */
GstStructure *prog_map;
guint pat_interval;
guint pmt_interval;
gint alignment;
guint si_interval;
guint64 bitrate;
guint pcr_interval;
guint scte35_pid;
guint scte35_null_interval;
/* state */
gboolean first;
GstClockTime pending_key_unit_ts;
GstEvent *force_key_unit_event;
GstMpegtsSection *pending_scte35_section;
/* write callback handling/state */
GstFlowReturn last_flow_ret;
GQueue streamheader;
gboolean streamheader_sent;
gboolean is_delta;
gboolean is_header;
GstClockTime last_ts;
gsize packet_size;
gsize automatic_alignment;
/* output buffer aggregation */
GstAdapter *out_adapter;
GstBuffer *out_buffer;
};
/**
* GstBaseTsMuxClass:
* @create_ts_mux: Optional.
* Called in order to create the #TsMux object.
* @handle_media_type: Optional.
* Called in order to determine the stream-type for a given
* @media_type (eg. video/x-h264).
* @allocate_packet: Optional.
* Called when the underlying #TsMux object needs a packet
* to write into.
* @output_packet: Optional.
* Called when the underlying #TsMux object has a packet
* ready to output.
* @reset: Optional.
* Called when the subclass needs to reset.
* @drain: Optional.
* Called at EOS, if the subclass has data it needs to drain.
*/
struct GstBaseTsMuxClass {
GstAggregatorClass parent_class;
TsMux * (*create_ts_mux) (GstBaseTsMux *mux);
guint (*handle_media_type) (GstBaseTsMux *mux, const gchar *media_type, GstBaseTsMuxPad * pad);
void (*allocate_packet) (GstBaseTsMux *mux, GstBuffer **buffer);
gboolean (*output_packet) (GstBaseTsMux *mux, GstBuffer *buffer, gint64 new_pcr);
void (*reset) (GstBaseTsMux *mux);
gboolean (*drain) (GstBaseTsMux *mux);
};
void gst_base_ts_mux_set_packet_size (GstBaseTsMux *mux, gsize size);
void gst_base_ts_mux_set_automatic_alignment (GstBaseTsMux *mux, gsize alignment);
typedef GstBuffer * (*GstBaseTsPadDataPrepareFunction) (GstBuffer * buf,
GstBaseTsPadData * data, GstBaseTsMux * mux);
typedef void (*GstBaseTsPadDataFreePrepareDataFunction) (gpointer prepare_data);
struct GstBaseTsPadData {
/* parent */
GstCollectData collect;
gint pid;
TsMuxStream *stream;
/* most recent DTS */
gint64 dts;
/* optional codec data available in the caps */
GstBuffer *codec_data;
/* Opaque data pointer to a structure used by the prepare function */
gpointer prepare_data;
/* handler to prepare input data */
GstBaseTsPadDataPrepareFunction prepare_func;
/* handler to free the private data */
GstBaseTsPadDataFreePrepareDataFunction free_func;
/* program id to which it is attached to (not program pid) */
gint prog_id;
/* program this stream belongs to */
TsMuxProgram *prog;
gchar *language;
};
GType gst_base_ts_mux_get_type (void);
G_END_DECLS
#endif