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gstreamer/subprojects/gst-plugins-bad/gst/mpegtsmux/gstbasetsmux.h
Edward Hervey 244b00ac08 mpegts: Add custom mapping for vp9 
This is a custom mapping. There isn't much needed apart from that to store vp9
in mpeg-ts since the bitstream is self contained.

Since there are no official specification we don't want people to be mistaken in
believing that. Therefore that mapping is only used in the muxer if the (new)
property `enable-custom-mappings` is set to TRUE.

* The MPEG-TS Stream Type is Private Data (0x6) with the registration descriptor
  set to `VP09`.
* The Access Unit are VP9 frames stored in PES packets
* As there is no emulation prevention byte in VP9 elementary stream, the can be
  misdetection of PES start code. To avoid this, the start of a PES packet must
  be signalled using the Payload Unit Start Indicator in the transport packet
  header

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7707>
2024-11-13 08:28:36 +01:00

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/*
* 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 3 different licenses and you
* can choose to use it under the terms of any one of them. The
* three licenses are the MPL 1.1, the LGPL 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.
*
* MIT:
*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* 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
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MPL-1.1 OR MIT OR LGPL-2.0-or-later
*/
#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;
gint bitrate;
gint max_bitrate;
gint stream_number;
};
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;
guint32 last_scte35_event_seqnum;
gboolean enable_custom_mappings;
/* 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;
GstClockTimeDiff output_ts_offset;
/* protects the tsmux object, the programs hash table, and pad streams */
GMutex lock;
};
/**
* 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
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