gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux-stream.h

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/* 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_STREAM_H_
#define _GST_ADAPTIVE_DEMUX_STREAM_H_
#include <gst/gst.h>
#include "gstadaptivedemux-types.h"
#include "downloadrequest.h"
G_BEGIN_DECLS
#define GST_TYPE_ADAPTIVE_DEMUX2_STREAM \
(gst_adaptive_demux2_stream_get_type())
#define GST_ADAPTIVE_DEMUX2_STREAM(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ADAPTIVE_DEMUX2_STREAM,GstAdaptiveDemux2Stream))
#define GST_ADAPTIVE_DEMUX2_STREAM_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ADAPTIVE_DEMUX2_STREAM,GstAdaptiveDemux2StreamClass))
#define GST_ADAPTIVE_DEMUX2_STREAM_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_ADAPTIVE_DEMUX2_STREAM,GstAdaptiveDemux2StreamClass))
#define GST_IS_ADAPTIVE_DEMUX2_STREAM(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ADAPTIVE_DEMUX2_STREAM))
#define GST_IS_ADAPTIVE_DEMUX2_STREAM_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ADAPTIVE_DEMUX2_STREAM))
#define GST_ADAPTIVE_DEMUX2_STREAM_CAST(obj) ((GstAdaptiveDemux2Stream *)obj)
#define GST_ADAPTIVE_DEMUX2_STREAM_NEED_HEADER(obj) (((GstAdaptiveDemux2Stream *) (obj))->need_header)
typedef enum _GstAdaptiveDemux2StreamState GstAdaptiveDemux2StreamState;
typedef struct _GstAdaptiveDemux2StreamFragment GstAdaptiveDemux2StreamFragment;
struct _GstAdaptiveDemux2StreamFragment
{
/* The period-local stream time for the given fragment. */
GstClockTimeDiff stream_time;
GstClockTime duration;
gchar *uri;
gint64 range_start;
gint64 range_end;
/* when chunked downloading is used, may be be updated need_another_chunk() */
gint chunk_size;
/* when headers are needed */
gchar *header_uri;
gint64 header_range_start;
gint64 header_range_end;
/* when index is needed */
gchar *index_uri;
gint64 index_range_start;
gint64 index_range_end;
gboolean finished;
};
enum _GstAdaptiveDemux2StreamState {
GST_ADAPTIVE_DEMUX2_STREAM_STATE_STOPPED, /* Stream was stopped */
GST_ADAPTIVE_DEMUX2_STREAM_STATE_RESTART, /* Stream stopped but needs restart logic */
GST_ADAPTIVE_DEMUX2_STREAM_STATE_START_FRAGMENT,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_PREPARE, /* Sub-class is busy and can't update_fragment_info() yet */
GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_LIVE,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_OUTPUT_SPACE,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_MANIFEST_UPDATE,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_BEFORE_DOWNLOAD, /* Ready, but not allowed to download yet */
GST_ADAPTIVE_DEMUX2_STREAM_STATE_DOWNLOADING,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_EOS,
GST_ADAPTIVE_DEMUX2_STREAM_STATE_ERRORED
};
struct _GstAdaptiveDemux2StreamClass
{
GstObjectClass parent_class;
/**
* update_fragment_info:
* @stream: #GstAdaptiveDemux2Stream
*
* Requests the stream to set the information about the current fragment to its
* current fragment struct
*
* Returns: #GST_FLOW_OK in success, #GST_FLOW_ERROR on error, #GST_FLOW_EOS
* if there is no fragment, or the custom GST_ADAPTIVE_DEMUX_FLOW_BUSY
* if the sub-class is still preparing.
*/
GstFlowReturn (*update_fragment_info) (GstAdaptiveDemux2Stream * stream);
/**
* submit_request:
* @stream: #GstAdaptiveDemux2Stream
* @download_req: #DownloadRequest
*
* Requests the stream submit the provided download request for processing,
* either through the DownloadHelper (default), or through some sub-class
* mechanism
*
* Returns: #GST_FLOW_OK in success, #GST_FLOW_ERROR on error
*/
GstFlowReturn (*submit_request) (GstAdaptiveDemux2Stream * stream, DownloadRequest * download_req);
/**
* finish_fragment:
* @stream: #GstAdaptiveDemux2Stream
*
* Notifies the subclass that a fragment download was finished.
* It can be used to cleanup internal state after a fragment and
* also push any pending data before moving to the next fragment.
*/
GstFlowReturn (*finish_fragment) (GstAdaptiveDemux2Stream * stream);
/**
* data_received:
* @stream: #GstAdaptiveDemux2Stream
* @buffer: #GstBuffer
*
* Notifies the subclass that a fragment chunk was downloaded. The subclass
* can look at the data and modify/push data as desired.
*
* Returns: #GST_FLOW_OK if successful, #GST_FLOW_ERROR in case of error.
*/
GstFlowReturn (*data_received) (GstAdaptiveDemux2Stream * stream, GstBuffer * buffer);
gboolean (*has_next_fragment) (GstAdaptiveDemux2Stream * stream);
GstFlowReturn (*advance_fragment) (GstAdaptiveDemux2Stream * stream);
GstFlowReturn (*stream_seek) (GstAdaptiveDemux2Stream * stream,
gboolean forward,
GstSeekFlags flags,
GstClockTimeDiff target_ts,
GstClockTimeDiff * final_ts);
/**
* start:
* @stream: a #GstAdaptiveDemux2Stream
*
* Called to start downloading a @stream, sub-classes should chain up to the default
* implementation. Sub-classes can return %FALSE if more
* information is required before the stream can be started. In that case, sub-classes
* will have to call gst_adaptive_demux2_stream_start() again when the stream should
* be started.
*/
void (*start) (GstAdaptiveDemux2Stream *stream);
/**
* stop:
* @stream: a #GstAdaptiveDemux2Stream
*
* Called to stop downloading a @stream, sub-classes should chain up to the default
* implementation.
*/
void (*stop) (GstAdaptiveDemux2Stream *stream);
/**
* create_tracks:
* @stream: A #GstAdaptiveDemux2Stream
*
* Called whenever the base class collected a @collection on a @stream which has
* pending tracks to be created. Subclasses should override this if they
* create streams without tracks.
*
* * create the various tracks by analyzing the @stream stream_collection
* * Set the track upstream_stream_id to the corresponding stream_id from the collection
*/
void (*create_tracks) (GstAdaptiveDemux2Stream *stream);
/**
* need_another_chunk:
* @stream: #GstAdaptiveDemux2Stream
*
* If chunked downloading is used (chunk_size != 0) this is called once a
* chunk is finished to decide whether more has to be downloaded or not.
* May update chunk_size to a different value
*/
gboolean (*need_another_chunk) (GstAdaptiveDemux2Stream * stream);
/**
* select_bitrate:
* @stream: #GstAdaptiveDemux2Stream
* @bitrate: the bitrate to select (in bytes per second)
*
* The stream should try to select the bitrate that is the greater, but not
* greater than the requested bitrate. If it needs a codec change it should
* create the new stream using gst_adaptive_demux2_stream_new(). If it only
* needs a caps change it should set the new caps using
* gst_adaptive_demux2_stream_set_caps().
*
* Returns: %TRUE if the stream changed bitrate, %FALSE otherwise
*/
gboolean (*select_bitrate) (GstAdaptiveDemux2Stream * stream, guint64 bitrate);
/**
* get_fragment_waiting_time:
* @stream: #GstAdaptiveDemux2Stream
*
* For live streams, requests how much time should be waited before starting
* to download the fragment. This is useful to avoid downloading a fragment that
* isn't available yet.
*
* Returns: The waiting time in as a #GstClockTime
*/
GstClockTime (*get_fragment_waiting_time) (GstAdaptiveDemux2Stream * stream);
/**
* start_fragment:
* @stream: #GstAdaptiveDemux2Stream
*
* Notifies the subclass that the given stream is starting the download
* of a new fragment. Can be used to reset/init internal state that is
* needed before each fragment, like decryption engines.
*
* Returns: %TRUE if successful.
*/
gboolean (*start_fragment) (GstAdaptiveDemux2Stream * stream);
/**
* get_presentation_offset:
* @stream: #GstAdaptiveDemux2Stream
*
* Gets the delay to apply to @stream.
*
* Return: a #GstClockTime representing the (positive) time offset to apply to
* @stream.
*/
GstClockTime (*get_presentation_offset) (GstAdaptiveDemux2Stream *stream);
};
struct _GstAdaptiveDemux2Stream
{
GstObject object;
/* FIXME : transition to gstobject->parent */
GstAdaptiveDemux *demux;
/* The period to which the stream belongs, set when adding the stream to the
* demuxer */
GstAdaptiveDemuxPeriod *period;
/* The tracks this stream targets */
GList *tracks;
/* The internal parsebin, forward data to track */
GstElement *parsebin;
GstPad *parsebin_sink;
gulong pad_added_id, pad_removed_id;
GstSegment parse_segment;
/* TRUE if the current stream GstSegment should be sent downstream */
gboolean send_segment;
/* TRUE if the stream GstSegment requires recalculation (from demuxer
segment) */
gboolean compute_segment;
/* first_and_live applies to compute_segment */
gboolean first_and_live;
/* When restarting, what is the target position (in demux segment) to
* begin at */
GstClockTime start_position;
/* Track the current position (in demux segment) of the current fragment */
GstClockTime current_position;
GstCaps *pending_caps;
GstTagList *pending_tags;
GList *pending_events;
GstFlowReturn last_ret;
GError *last_error;
gboolean discont;
/* download tooling */
gboolean need_header;
gboolean need_index;
gboolean downloading_header;
gboolean downloading_index;
/* persistent, reused download request for fragment data */
DownloadRequest *download_request;
GstAdaptiveDemux2StreamState state;
guint pending_cb_id;
gboolean download_active;
GMutex prepare_lock;
GCond prepare_cond;
/* The (global output) time at which this stream should be woken
* to download more input */
GstClockTimeDiff next_input_wakeup_time;
guint last_status_code;
gboolean pending_tracks; /* if we need to discover tracks dynamically for this stream */
gboolean download_finished;
gboolean starting_fragment;
gboolean first_fragment_buffer;
gint64 download_start_time;
gint64 download_total_bytes;
gint64 download_end_offset;
guint64 current_download_rate;
/* bitrate of the previous fragment (pre-queue2) */
guint64 last_bitrate;
/* Total last download time, from request to completion */
GstClockTime last_download_time;
/* Average for the last fragments */
guint64 moving_bitrate;
guint moving_index;
guint64 *fragment_bitrates;
GstAdaptiveDemux2StreamFragment fragment;
gboolean download_error_retry;
guint download_error_count;
/* Last collection provided by parsebin */
GstStreamCollection *stream_collection;
/* OR'd set of stream types in this stream */
GstStreamType stream_type;
/* The buffering threshold recommended by the subclass */
GstClockTime recommended_buffering_threshold;
};
GType gst_adaptive_demux2_stream_get_type (void);
void gst_adaptive_demux2_stream_start (GstAdaptiveDemux2Stream * stream);
void gst_adaptive_demux2_stream_queue_event (GstAdaptiveDemux2Stream * stream,
GstEvent * event);
gboolean gst_adaptive_demux2_stream_is_selected (GstAdaptiveDemux2Stream *stream);
gboolean gst_adaptive_demux2_stream_is_running (GstAdaptiveDemux2Stream * stream);
void gst_adaptive_demux2_stream_set_caps (GstAdaptiveDemux2Stream * stream,
GstCaps * caps);
void gst_adaptive_demux2_stream_set_tags (GstAdaptiveDemux2Stream * stream,
GstTagList * tags);
GstFlowReturn gst_adaptive_demux2_stream_push_buffer (GstAdaptiveDemux2Stream * stream,
GstBuffer * buffer);
GstFlowReturn gst_adaptive_demux2_stream_advance_fragment (GstAdaptiveDemux2Stream * stream,
GstClockTime duration);
gboolean gst_adaptive_demux2_stream_handle_collection (GstAdaptiveDemux2Stream *stream,
GstStreamCollection *collection, gboolean *had_pending_tracks);
void gst_adaptive_demux2_stream_mark_prepared(GstAdaptiveDemux2Stream *stream);
gboolean gst_adaptive_demux2_stream_wait_prepared(GstAdaptiveDemux2Stream *stream);
void gst_adaptive_demux2_stream_fragment_clear (GstAdaptiveDemux2StreamFragment * f);
G_END_DECLS
#endif