gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux.h
Jan Schmidt 565f47b4f3 adaptivedemux2: Move stream_seek() to the Stream class
Move the last stream specific vfunc from the demux
class to the stream class.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3314>
2022-11-05 04:00:31 +11:00

477 lines
14 KiB
C

/* GStreamer
*
* Copyright (C) 2014 Samsung Electronics. All rights reserved.
* Author: Thiago Santos <thiagoss@osg.samsung.com>
*
* Copyright (C) 2021-2022 Centricular Ltd
* Author: Edward Hervey <edward@centricular.com>
* Author: Jan Schmidt <jan@centricular.com>
*
* 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.
*/
#ifndef _GST_ADAPTIVE_DEMUX_H_
#define _GST_ADAPTIVE_DEMUX_H_
#include <gst/gst.h>
#include <gst/base/gstqueuearray.h>
#include <gst/app/gstappsrc.h>
#include "downloadhelper.h"
#include "downloadrequest.h"
#include "gstadaptivedemuxutils.h"
#include "gstadaptivedemux-types.h"
#include "gstadaptivedemux-stream.h"
G_BEGIN_DECLS
/**
* GST_ADAPTIVE_DEMUX_SINK_NAME:
*
* The name of the templates for the sink pad.
*/
#define GST_ADAPTIVE_DEMUX_SINK_NAME "sink"
/**
* GST_ADAPTIVE_DEMUX_SINK_PAD:
* @obj: a #GstAdaptiveDemux
*
* Gives the pointer to the sink #GstPad object of the element.
*/
#define GST_ADAPTIVE_DEMUX_SINK_PAD(obj) (((GstAdaptiveDemux *) (obj))->sinkpad)
#define GST_ADAPTIVE_DEMUX_IN_TRICKMODE_KEY_UNITS(obj) ((((GstAdaptiveDemux*)(obj))->segment.flags & GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS) == GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS)
/**
* GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME:
*
* Name of the ELEMENT type messages posted by dashdemux with statistics.
*
* Since: 1.6
*/
#define GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME "adaptive-streaming-statistics"
#define GST_ELEMENT_ERROR_FROM_ERROR(el, msg, err) G_STMT_START { \
gchar *__dbg = g_strdup_printf ("%s: %s", msg, err->message); \
GST_WARNING_OBJECT (el, "error: %s", __dbg); \
gst_element_message_full (GST_ELEMENT(el), GST_MESSAGE_ERROR, \
err->domain, err->code, \
NULL, __dbg, __FILE__, GST_FUNCTION, __LINE__); \
g_clear_error (&err); \
} G_STMT_END
/* DEPRECATED */
#define GST_ADAPTIVE_DEMUX_FLOW_END_OF_FRAGMENT GST_FLOW_CUSTOM_SUCCESS_1
/* Current fragment download should be aborted and restarted. The parent class
* will call ::update_fragment_info() on the stream again to get the updated information.
*/
#define GST_ADAPTIVE_DEMUX_FLOW_RESTART_FRAGMENT GST_FLOW_CUSTOM_SUCCESS_2
/* The live stream has lost synchronization and the demuxer needs to be resetted */
#define GST_ADAPTIVE_DEMUX_FLOW_LOST_SYNC GST_FLOW_CUSTOM_SUCCESS_2 + 1
typedef struct _GstAdaptiveDemuxPrivate GstAdaptiveDemuxPrivate;
struct _GstAdaptiveDemuxTrack
{
gint ref_count;
/* Demux */
GstAdaptiveDemux *demux;
/* Stream type */
GstStreamType type;
/* Stream flags */
GstStreamFlags flags;
/* Unique identifier */
gchar *stream_id;
/* Period number this track belongs
* to (MAXINT if not assigned to a period yet)
*/
guint period_num;
/* Unique identifier of the internal stream produced
* by parsebin for the Stream this track comes from */
gchar *upstream_stream_id;
/* Generic *elementary stream* caps */
GstCaps *generic_caps;
/* Generic metadata */
GstTagList *tags;
/* The stream object */
GstStream *stream_object;
/* If TRUE, this track should be filled */
gboolean selected;
/* If TRUE, this track is currently being outputted */
gboolean active;
/* If TRUE, it is no longer selected but still being outputted. */
gboolean draining;
/* FIXME : Replace by actual track element */
GstElement *element;
/* The level at which 100% buffering is achieved */
GstClockTime buffering_threshold;
/* The sinkpad receives parsed elementary stream */
GstPad *sinkpad;
/* The pending parsebin source pad (used in case streams from parsebin get updated) (ref taken) */
GstPad *pending_srcpad;
/* Data storage */
GstQueueArray *queue;
/* Sticky event storage for this track */
GstEventStore sticky_events;
/* ============== */
/* Input tracking */
/* The track received EOS */
gboolean eos;
/* Input segment and time (in running time) */
GstSegment input_segment;
GstClockTimeDiff input_time;
GstClockTimeDiff lowest_input_time;
guint64 input_segment_seqnum;
/* ================= */
/* Contents tracking */
/* Current level of queue in bytes and time */
guint64 level_bytes;
GstClockTime level_time;
/* =============== */
/* Output tracking */
/* Is the output thread waiting for data on this track ? */
gboolean waiting_add;
/* If TRUE, the next pending GstSegment running time should be updated to the
* time stored in update_next_segment_run_ts */
gboolean update_next_segment;
/* Output segment and time (in running time) */
GstSegment output_segment;
GstClockTimeDiff output_time;
/* Track position and duration for emitting gap
* events */
GstClockTime gap_position;
GstClockTime gap_duration;
/* Next running time position pending in queue */
GstClockTimeDiff next_position;
/* If the next output buffer should be marked discont */
gboolean output_discont;
};
/**
* GstAdaptiveDemuxPeriod:
*
* The opaque #GstAdaptiveDemuxPeriod data structure. */
struct _GstAdaptiveDemuxPeriod
{
gint ref_count;
GstAdaptiveDemux *demux;
/* TRUE if the streams of this period were prepared and can be started */
gboolean prepared;
/* TRUE if there is another period after this one */
gboolean has_next_period;
/* An increasing unique identifier for the period.
*
* Note: unrelated to dash period id (which can be identical across
* periods) */
guint period_num;
/* The list of GstAdaptiveDemux2Stream (ref hold) */
GList *streams;
/* Current collection */
GstStreamCollection *collection;
/* List of available GstAdaptiveDemuxTrack (ref hold) */
GList *tracks;
/* Whether tracks were changed and need re-matching against outputs */
gboolean tracks_changed;
/* The time at which to wake up input streams for more
* data - the earliest of all waiting input stream thresholds,
* or GST_CLOCK_STIME_NONE if noone is waiting */
GstClockTimeDiff next_input_wakeup_time;
};
/**
* GstAdaptiveDemux:
*
* The opaque #GstAdaptiveDemux data structure.
*/
struct _GstAdaptiveDemux
{
/*< private >*/
GstBin bin;
gint running;
/*< protected >*/
GstPad *sinkpad;
DownloadHelper *download_helper;
/* Protected by TRACKS_LOCK */
/* Period used for output */
GstAdaptiveDemuxPeriod *output_period;
/* Period used for input */
GstAdaptiveDemuxPeriod *input_period;
GstSegment segment;
gdouble instant_rate_multiplier; /* 1.0 by default, or from instant-rate seek */
gchar *manifest_uri;
gchar *manifest_base_uri;
/* Properties */
gfloat bandwidth_target_ratio; /* ratio of the available bitrate to use */
guint connection_speed; /* Available / bandwidth to use set by the application */
guint min_bitrate; /* Minimum bitrate to choose */
guint max_bitrate; /* Maximum bitrate to choose */
guint current_download_rate; /* Current estimate of download bitrate */
/* Buffering levels */
GstClockTime max_buffering_time;
GstClockTime buffering_high_watermark_time;
GstClockTime buffering_low_watermark_time;
gdouble buffering_high_watermark_fragments;
gdouble buffering_low_watermark_fragments;
/* video/audio buffer level as minimum of the appropriate streams */
GstClockTime current_level_time_video;
GstClockTime current_level_time_audio;
gboolean have_group_id;
guint group_id;
guint next_stream_id;
/* Realtime clock */
GstAdaptiveDemuxClock *realtime_clock;
/* < private > */
GstAdaptiveDemuxPrivate *priv;
};
/**
* GstAdaptiveDemuxClass:
*
*/
struct _GstAdaptiveDemuxClass
{
/*< private >*/
GstBinClass bin_class;
/*< public >*/
/**
* process_manifest: Parse the manifest
* @demux: #GstAdaptiveDemux
* @manifest: the manifest to be parsed
*
* Parse the manifest and add the created streams using
* gst_adaptive_demux2_stream_new()
*
* Returns: %TRUE if successful
*/
gboolean (*process_manifest) (GstAdaptiveDemux * demux, GstBuffer * manifest);
/**
* get_manifest_update_interval:
* @demux: #GstAdaptiveDemux
*
* Used during live streaming, the subclass should return the interval
* between successive manifest updates
*
* Returns: the update interval in microseconds
*/
gint64 (*get_manifest_update_interval) (GstAdaptiveDemux * demux);
/**
* update_manifest:
* @demux: #GstAdaptiveDemux
*
* During live streaming, this will be called for the subclass to update its
* manifest with the new version. By default it fetches the manifest URI
* and passes it to GstAdaptiveDemux::update_manifest_data().
*
* Returns: #GST_FLOW_OK is all succeeded, #GST_FLOW_EOS if the stream ended
* or #GST_FLOW_ERROR if an error happened
*/
GstFlowReturn (*update_manifest) (GstAdaptiveDemux * demux);
/**
* update_manifest_data:
* @demux: #GstAdaptiveDemux
* @buf: Downloaded manifest data
*
* During live streaming, this will be called for the subclass to update its
* manifest with the new version
*
* Returns: #GST_FLOW_OK is all succeeded, #GST_FLOW_EOS if the stream ended
* or #GST_FLOW_ERROR if an error happened
*/
GstFlowReturn (*update_manifest_data) (GstAdaptiveDemux * demux, GstBuffer * buf);
gboolean (*is_live) (GstAdaptiveDemux * demux);
GstClockTime (*get_duration) (GstAdaptiveDemux * demux);
/**
* reset:
* @demux: #GstAdaptiveDemux
*
* Reset the internal state of the subclass, getting ready to restart with
* a new stream afterwards
*/
void (*reset) (GstAdaptiveDemux * demux);
/**
* seek:
* @demux: #GstAdaptiveDemux
* @seek: a seek #GstEvent
*
* The demuxer should seek on all its streams to the specified position
* in the seek event
*
* Returns: %TRUE if successful
*/
gboolean (*seek) (GstAdaptiveDemux * demux, GstEvent * seek);
/**
* has_next_period:
* @demux: #GstAdaptiveDemux
*
* Checks if there is a next period following the current one.
* DASH can have multiple medias chained in its manifest, when one finishes
* this function is called to verify if there is a new period to be played
* in sequence.
*
* Returns: %TRUE if there is another period
*/
gboolean (*has_next_period) (GstAdaptiveDemux * demux);
/**
* advance_period:
* @demux: #GstAdaptiveDemux
*
* Advances the manifest to the next period. New streams should be created
* using gst_adaptive_demux2_stream_new().
*/
void (*advance_period) (GstAdaptiveDemux * demux);
/**
* get_live_seek_range:
* @demux: #GstAdaptiveDemux
* @start: pointer to put the start position allowed to seek to
* @stop: pointer to put the stop position allowed to seek to
*
* Gets the allowed seek start and stop positions for the current live stream
*
* Return: %TRUE if successful
*/
gboolean (*get_live_seek_range) (GstAdaptiveDemux * demux, gint64 * start, gint64 * stop);
/**
* get_period_start_time:
* @demux: #GstAdaptiveDemux
*
* Gets the start time of the current period. Timestamps are resetting to 0
* after each period but we have to maintain a continuous stream and running
* time so need to know the start time of the current period.
*
* Return: a #GstClockTime representing the start time of the currently
* selected period.
*/
GstClockTime (*get_period_start_time) (GstAdaptiveDemux *demux);
/**
* requires_periodical_playlist_update:
* @demux: #GstAdaptiveDemux
*
* Some adaptive streaming protocols allow the client to download
* the playlist once and build up the fragment list based on the
* current fragment metadata. For those protocols the demuxer
* doesn't need to periodically refresh the playlist. This vfunc
* is relevant only for live playback scenarios.
*
* Return: %TRUE if the playlist needs to be refreshed periodically by the demuxer.
*/
gboolean (*requires_periodical_playlist_update) (GstAdaptiveDemux * demux);
};
GType gst_adaptive_demux_ng_get_type (void);
gboolean gst_adaptive_demux2_add_stream (GstAdaptiveDemux *demux,
GstAdaptiveDemux2Stream *stream);
gboolean gst_adaptive_demux2_stream_add_track (GstAdaptiveDemux2Stream *stream,
GstAdaptiveDemuxTrack *track);
GstAdaptiveDemuxTrack *gst_adaptive_demux_track_new (GstAdaptiveDemux *demux,
GstStreamType type,
GstStreamFlags flags,
gchar *stream_id,
GstCaps *caps,
GstTagList *tags);
GstAdaptiveDemuxTrack *gst_adaptive_demux_track_ref (GstAdaptiveDemuxTrack *track);
void gst_adaptive_demux_track_unref (GstAdaptiveDemuxTrack *track);
gboolean gst_adaptive_demux_start_new_period (GstAdaptiveDemux * demux);
GstClockTime gst_adaptive_demux2_get_monotonic_time (GstAdaptiveDemux * demux);
GDateTime *gst_adaptive_demux2_get_client_now_utc (GstAdaptiveDemux * demux);
gboolean gst_adaptive_demux2_is_running (GstAdaptiveDemux * demux);
GstClockTime gst_adaptive_demux2_get_qos_earliest_time (GstAdaptiveDemux *demux);
GstCaps * gst_codec_utils_caps_from_iso_rfc6831 (gchar * codec);
gdouble gst_adaptive_demux_play_rate (GstAdaptiveDemux *demux);
G_END_DECLS
#endif