mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
95c705ae8f
Unless the DASH client can compensate for the difference between its
clock and the clock used by the server, the client might request
fragments that either not yet on the server or fragments that have
already been expired from the server. This is an issue because these
requests can propagate all the way back to the origin
ISO/IEC 23009-1:2014/Amd 1 [PDAM1] defines a new UTCTiming element to allow
a DASH client to track the clock used by the server generating the
DASH stream. Multiple UTCTiming elements might be present, to indicate
support for multiple methods of UTC time gathering. Each element can
contain a white space separated list of URLs that can be contacted
to discover the UTC time from the server's perspective.
This commit provides parsing of UTCTiming elements, unit tests of this
parsing and a function to poll a time server. This function
supports the following methods:
urn:mpeg:dash:utc:ntp:2014
urn:mpeg:dash:utc:http-xsdate:2014
urn:mpeg:dash:utc:http-iso:2014
urn:mpeg:dash:utc:http-ntp:2014
The manifest update task is used to poll the clock time server,
to save having to create a new thread.
When choosing the starting fragment number and when waiting for a
fragment to become available, the difference between the server's idea
of UTC and the client's idea of UTC is taken into account. For example,
if the server's time is behind the client's idea of UTC, we wait for
longer before requesting a fragment
[PDAM1]: http://www.iso.org/iso/home/store/catalogue_tc/catalogue_detail.htm?csnumber=66068
dashdemux: support NTP time servers in UTCTiming elements
Use the gst_ntp_clock to support the use of an NTP server.
https://bugzilla.gnome.org/show_bug.cgi?id=752413
582 lines
19 KiB
C
582 lines
19 KiB
C
/*
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* DASH MPD parsing library
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*
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* gstmpdparser.h
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*
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* Copyright (C) 2012 STMicroelectronics
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*
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* Authors:
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* Gianluca Gennari <gennarone@gmail.com>
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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 2.1 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 (COPYING); if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_MPDPARSER_H__
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#define __GST_MPDPARSER_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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typedef struct _GstMpdClient GstMpdClient;
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typedef struct _GstActiveStream GstActiveStream;
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typedef struct _GstStreamPeriod GstStreamPeriod;
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typedef struct _GstMediaFragmentInfo GstMediaFragmentInfo;
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typedef struct _GstMediaSegment GstMediaSegment;
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typedef struct _GstMPDNode GstMPDNode;
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typedef struct _GstPeriodNode GstPeriodNode;
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typedef struct _GstRepresentationBaseType GstRepresentationBaseType;
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typedef struct _GstDescriptorType GstDescriptorType;
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typedef struct _GstContentComponentNode GstContentComponentNode;
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typedef struct _GstAdaptationSetNode GstAdaptationSetNode;
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typedef struct _GstRepresentationNode GstRepresentationNode;
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typedef struct _GstSubRepresentationNode GstSubRepresentationNode;
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typedef struct _GstSegmentListNode GstSegmentListNode;
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typedef struct _GstSegmentTemplateNode GstSegmentTemplateNode;
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typedef struct _GstSegmentURLNode GstSegmentURLNode;
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typedef struct _GstBaseURL GstBaseURL;
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typedef struct _GstRange GstRange;
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typedef struct _GstRatio GstRatio;
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typedef struct _GstFrameRate GstFrameRate;
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typedef struct _GstConditionalUintType GstConditionalUintType;
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typedef struct _GstSubsetNode GstSubsetNode;
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typedef struct _GstProgramInformationNode GstProgramInformationNode;
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typedef struct _GstMetricsRangeNode GstMetricsRangeNode;
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typedef struct _GstMetricsNode GstMetricsNode;
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typedef struct _GstUTCTimingNode GstUTCTimingNode;
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typedef struct _GstSNode GstSNode;
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typedef struct _GstSegmentTimelineNode GstSegmentTimelineNode;
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typedef struct _GstSegmentBaseType GstSegmentBaseType;
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typedef struct _GstURLType GstURLType;
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typedef struct _GstMultSegmentBaseType GstMultSegmentBaseType;
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#define GST_MPD_CLIENT_LOCK(c) g_mutex_lock (&c->lock);
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#define GST_MPD_CLIENT_UNLOCK(c) g_mutex_unlock (&c->lock);
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typedef enum
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{
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GST_STREAM_UNKNOWN,
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GST_STREAM_VIDEO, /* video stream (the main one) */
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GST_STREAM_AUDIO, /* audio stream (optional) */
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GST_STREAM_APPLICATION /* application stream (optional): for timed text/subtitles */
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} GstStreamMimeType;
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typedef enum
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{
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GST_MPD_FILE_TYPE_STATIC,
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GST_MPD_FILE_TYPE_DYNAMIC
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} GstMPDFileType;
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typedef enum
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{
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GST_SAP_TYPE_0 = 0,
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GST_SAP_TYPE_1,
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GST_SAP_TYPE_2,
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GST_SAP_TYPE_3,
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GST_SAP_TYPE_4,
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GST_SAP_TYPE_5,
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GST_SAP_TYPE_6
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} GstSAPType;
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typedef enum
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{
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GST_MPD_UTCTIMING_TYPE_UNKNOWN = 0x00,
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GST_MPD_UTCTIMING_TYPE_NTP = 0x01,
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GST_MPD_UTCTIMING_TYPE_SNTP = 0x02,
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GST_MPD_UTCTIMING_TYPE_HTTP_HEAD = 0x04,
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GST_MPD_UTCTIMING_TYPE_HTTP_XSDATE = 0x08,
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GST_MPD_UTCTIMING_TYPE_HTTP_ISO = 0x10,
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GST_MPD_UTCTIMING_TYPE_HTTP_NTP = 0x20,
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GST_MPD_UTCTIMING_TYPE_DIRECT = 0x40
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} GstMPDUTCTimingType;
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struct _GstBaseURL
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{
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gchar *baseURL;
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gchar *serviceLocation;
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gchar *byteRange;
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};
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struct _GstRange
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{
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guint64 first_byte_pos;
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guint64 last_byte_pos;
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};
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struct _GstRatio
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{
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guint num;
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guint den;
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};
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struct _GstFrameRate
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{
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guint num;
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guint den;
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};
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struct _GstConditionalUintType
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{
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gboolean flag;
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guint value;
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};
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struct _GstSNode
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{
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guint64 t;
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guint64 d;
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guint r;
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};
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struct _GstSegmentTimelineNode
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{
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/* list of S nodes */
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GQueue S;
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};
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struct _GstURLType
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{
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gchar *sourceURL;
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GstRange *range;
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};
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struct _GstSegmentBaseType
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{
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guint timescale;
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guint64 presentationTimeOffset;
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GstRange *indexRange;
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gboolean indexRangeExact;
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/* Initialization node */
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GstURLType *Initialization;
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/* RepresentationIndex node */
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GstURLType *RepresentationIndex;
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};
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struct _GstMultSegmentBaseType
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{
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guint duration; /* in seconds */
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guint startNumber;
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/* SegmentBaseType extension */
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GstSegmentBaseType *SegBaseType;
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/* SegmentTimeline node */
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GstSegmentTimelineNode *SegmentTimeline;
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/* BitstreamSwitching node */
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GstURLType *BitstreamSwitching;
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};
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struct _GstSegmentListNode
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{
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/* extension */
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GstMultSegmentBaseType *MultSegBaseType;
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/* list of SegmentURL nodes */
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GList *SegmentURL;
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};
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struct _GstSegmentTemplateNode
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{
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/* extension */
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GstMultSegmentBaseType *MultSegBaseType;
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gchar *media;
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gchar *index;
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gchar *initialization;
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gchar *bitstreamSwitching;
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};
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struct _GstSegmentURLNode
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{
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gchar *media;
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GstRange *mediaRange;
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gchar *index;
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GstRange *indexRange;
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};
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struct _GstRepresentationBaseType
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{
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gchar *profiles;
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guint width;
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guint height;
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GstRatio *sar;
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GstFrameRate *frameRate;
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gchar *audioSamplingRate;
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gchar *mimeType;
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gchar *segmentProfiles;
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gchar *codecs;
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gdouble maximumSAPPeriod;
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GstSAPType startWithSAP;
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gdouble maxPlayoutRate;
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gboolean codingDependency;
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gchar *scanType;
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/* list of FramePacking DescriptorType nodes */
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GList *FramePacking;
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/* list of AudioChannelConfiguration DescriptorType nodes */
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GList *AudioChannelConfiguration;
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/* list of ContentProtection DescriptorType nodes */
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GList *ContentProtection;
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};
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struct _GstSubRepresentationNode
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{
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/* RepresentationBase extension */
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GstRepresentationBaseType *RepresentationBase;
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guint level;
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guint *dependencyLevel; /* UIntVectorType */
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guint size; /* size of "dependencyLevel" array */
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guint bandwidth;
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gchar **contentComponent; /* StringVectorType */
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};
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struct _GstRepresentationNode
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{
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gchar *id;
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guint bandwidth;
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guint qualityRanking;
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gchar **dependencyId; /* StringVectorType */
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gchar **mediaStreamStructureId; /* StringVectorType */
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/* RepresentationBase extension */
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GstRepresentationBaseType *RepresentationBase;
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/* list of BaseURL nodes */
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GList *BaseURLs;
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/* list of SubRepresentation nodes */
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GList *SubRepresentations;
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/* SegmentBase node */
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GstSegmentBaseType *SegmentBase;
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/* SegmentTemplate node */
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GstSegmentTemplateNode *SegmentTemplate;
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/* SegmentList node */
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GstSegmentListNode *SegmentList;
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};
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struct _GstDescriptorType
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{
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gchar *schemeIdUri;
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gchar *value;
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};
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struct _GstContentComponentNode
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{
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guint id;
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gchar *lang; /* LangVectorType RFC 5646 */
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gchar *contentType;
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GstRatio *par;
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/* list of Accessibility DescriptorType nodes */
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GList *Accessibility;
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/* list of Role DescriptorType nodes */
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GList *Role;
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/* list of Rating DescriptorType nodes */
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GList *Rating;
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/* list of Viewpoint DescriptorType nodes */
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GList *Viewpoint;
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};
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struct _GstAdaptationSetNode
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{
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guint id;
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guint group;
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gchar *lang; /* LangVectorType RFC 5646 */
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gchar *contentType;
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GstRatio *par;
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guint minBandwidth;
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guint maxBandwidth;
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guint minWidth;
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guint maxWidth;
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guint minHeight;
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guint maxHeight;
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GstFrameRate *minFrameRate;
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GstFrameRate *maxFrameRate;
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GstConditionalUintType *segmentAlignment;
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GstConditionalUintType *subsegmentAlignment;
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GstSAPType subsegmentStartsWithSAP;
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gboolean bitstreamSwitching;
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/* list of Accessibility DescriptorType nodes */
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GList *Accessibility;
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/* list of Role DescriptorType nodes */
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GList *Role;
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/* list of Rating DescriptorType nodes */
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GList *Rating;
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/* list of Viewpoint DescriptorType nodes */
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GList *Viewpoint;
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/* RepresentationBase extension */
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GstRepresentationBaseType *RepresentationBase;
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/* SegmentBase node */
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GstSegmentBaseType *SegmentBase;
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/* SegmentList node */
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GstSegmentListNode *SegmentList;
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/* SegmentTemplate node */
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GstSegmentTemplateNode *SegmentTemplate;
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/* list of BaseURL nodes */
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GList *BaseURLs;
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/* list of Representation nodes */
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GList *Representations;
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/* list of ContentComponent nodes */
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GList *ContentComponents;
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};
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struct _GstSubsetNode
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{
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guint *contains; /* UIntVectorType */
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guint size; /* size of the "contains" array */
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};
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struct _GstPeriodNode
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{
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gchar *id;
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gint64 start; /* [ms] */
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gint64 duration; /* [ms] */
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gboolean bitstreamSwitching;
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/* SegmentBase node */
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GstSegmentBaseType *SegmentBase;
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/* SegmentList node */
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GstSegmentListNode *SegmentList;
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/* SegmentTemplate node */
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GstSegmentTemplateNode *SegmentTemplate;
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/* list of Adaptation Set nodes */
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GList *AdaptationSets;
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/* list of Representation nodes */
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GList *Subsets;
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/* list of BaseURL nodes */
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GList *BaseURLs;
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};
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struct _GstProgramInformationNode
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{
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gchar *lang; /* LangVectorType RFC 5646 */
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gchar *moreInformationURL;
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/* children nodes */
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gchar *Title;
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gchar *Source;
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gchar *Copyright;
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};
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struct _GstMetricsRangeNode
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{
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gint64 starttime; /* [ms] */
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gint64 duration; /* [ms] */
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};
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struct _GstMetricsNode
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{
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gchar *metrics;
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/* list of Metrics Range nodes */
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GList *MetricsRanges;
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/* list of Reporting nodes */
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GList *Reportings;
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};
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struct _GstUTCTimingNode {
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GstMPDUTCTimingType method;
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/* NULL terminated array of strings */
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gchar **urls;
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};
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struct _GstMPDNode
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{
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gchar *default_namespace;
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gchar *namespace_xsi;
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gchar *namespace_ext;
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gchar *schemaLocation;
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gchar *id;
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gchar *profiles;
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GstMPDFileType type;
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GstDateTime *availabilityStartTime;
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GstDateTime *availabilityEndTime;
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gint64 mediaPresentationDuration; /* [ms] */
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gint64 minimumUpdatePeriod; /* [ms] */
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gint64 minBufferTime; /* [ms] */
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gint64 timeShiftBufferDepth; /* [ms] */
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gint64 suggestedPresentationDelay; /* [ms] */
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gint64 maxSegmentDuration; /* [ms] */
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gint64 maxSubsegmentDuration; /* [ms] */
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/* list of BaseURL nodes */
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GList *BaseURLs;
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/* list of Location nodes */
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GList *Locations;
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/* List of ProgramInformation nodes */
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GList *ProgramInfo;
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/* list of Periods nodes */
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GList *Periods;
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/* list of Metrics nodes */
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GList *Metrics;
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/* list of GstUTCTimingNode nodes */
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GList *UTCTiming;
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};
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/**
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* GstStreamPeriod:
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*
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* Stream period data structure
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*/
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struct _GstStreamPeriod
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{
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GstPeriodNode *period; /* Stream period */
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guint number; /* Period number */
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GstClockTime start; /* Period start time */
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GstClockTime duration; /* Period duration */
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};
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/**
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* GstMediaSegment:
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*
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* Media segment data structure
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*/
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struct _GstMediaSegment
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{
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GstSegmentURLNode *SegmentURL; /* this is NULL when using a SegmentTemplate */
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guint number; /* segment number */
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gint repeat; /* number of extra repetitions (0 = played only once) */
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gint64 scale_start; /* start time in timescale units */
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gint64 scale_duration; /* duration in timescale units */
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GstClockTime start; /* segment start time */
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GstClockTime duration; /* segment duration */
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};
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struct _GstMediaFragmentInfo
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{
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gchar *uri;
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gint64 range_start;
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gint64 range_end;
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gchar *index_uri;
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gint64 index_range_start;
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gint64 index_range_end;
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gboolean discontinuity;
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GstClockTime timestamp;
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GstClockTime duration;
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};
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/**
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* GstActiveStream:
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*
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* Active stream data structure
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*/
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struct _GstActiveStream
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{
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GstStreamMimeType mimeType; /* video/audio/application */
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guint baseURL_idx; /* index of the baseURL used for last request */
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gchar *baseURL; /* active baseURL used for last request */
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gchar *queryURL; /* active queryURL used for last request */
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guint max_bandwidth; /* max bandwidth allowed for this mimeType */
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GstAdaptationSetNode *cur_adapt_set; /* active adaptation set */
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gint representation_idx; /* index of current representation */
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GstRepresentationNode *cur_representation; /* active representation */
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GstSegmentBaseType *cur_segment_base; /* active segment base */
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GstSegmentListNode *cur_segment_list; /* active segment list */
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GstSegmentTemplateNode *cur_seg_template; /* active segment template */
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gint segment_index; /* index of next sequence chunk */
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guint segment_repeat_index; /* index of the repeat count of a segment */
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GPtrArray *segments; /* array of GstMediaSegment */
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GstClockTime presentationTimeOffset; /* presentation time offset of the current segment */
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};
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struct _GstMpdClient
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{
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GstMPDNode *mpd_node; /* active MPD manifest file */
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GList *periods; /* list of GstStreamPeriod */
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guint period_idx; /* index of current Period */
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GList *active_streams; /* list of GstActiveStream */
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guint update_failed_count;
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gchar *mpd_uri; /* manifest file URI */
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gchar *mpd_base_uri; /* base URI for resolving relative URIs.
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* this will be different for redirects */
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/* profiles */
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gboolean profile_isoff_ondemand;
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};
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|
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/* Basic initialization/deinitialization functions */
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GstMpdClient *gst_mpd_client_new (void);
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void gst_active_streams_free (GstMpdClient * client);
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void gst_mpd_client_free (GstMpdClient * client);
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void gst_media_fragment_info_clear (GstMediaFragmentInfo * fragment);
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/* MPD file parsing */
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gboolean gst_mpd_parse (GstMpdClient *client, const gchar *data, gint size);
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/* Streaming management */
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gboolean gst_mpd_client_setup_media_presentation (GstMpdClient *client);
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gboolean gst_mpd_client_setup_streaming (GstMpdClient * client, GstAdaptationSetNode * adapt_set);
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gboolean gst_mpd_client_setup_representation (GstMpdClient *client, GstActiveStream *stream, GstRepresentationNode *representation);
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GstClockTime gst_mpd_client_get_next_fragment_duration (GstMpdClient * client, GstActiveStream * stream);
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GstClockTime gst_mpd_client_get_media_presentation_duration (GstMpdClient *client);
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gboolean gst_mpd_client_get_last_fragment_timestamp_end (GstMpdClient * client, guint stream_idx, GstClockTime * ts);
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gboolean gst_mpd_client_get_next_fragment_timestamp (GstMpdClient * client, guint stream_idx, GstClockTime * ts);
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gboolean gst_mpd_client_get_next_fragment (GstMpdClient *client, guint indexStream, GstMediaFragmentInfo * fragment);
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gboolean gst_mpd_client_get_next_header (GstMpdClient *client, gchar **uri, guint stream_idx, gint64 * range_start, gint64 * range_end);
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gboolean gst_mpd_client_get_next_header_index (GstMpdClient *client, gchar **uri, guint stream_idx, gint64 * range_start, gint64 * range_end);
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gboolean gst_mpd_client_is_live (GstMpdClient * client);
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gboolean gst_mpd_client_stream_seek (GstMpdClient * client, GstActiveStream * stream, GstClockTime ts);
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gboolean gst_mpd_client_seek_to_time (GstMpdClient * client, GDateTime * time);
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gint gst_mpd_client_check_time_position (GstMpdClient * client, GstActiveStream * stream, GstClockTime ts, gint64 * diff);
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GstClockTime gst_mpd_parser_get_stream_presentation_offset (GstMpdClient *client, guint stream_idx);
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gchar** gst_mpd_client_get_utc_timing_sources (GstMpdClient *client, guint methods, GstMPDUTCTimingType *selected_method);
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/* Period selection */
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guint gst_mpd_client_get_period_index_at_time (GstMpdClient * client, GstDateTime * time);
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gboolean gst_mpd_client_set_period_index (GstMpdClient *client, guint period_idx);
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gboolean gst_mpd_client_set_period_id (GstMpdClient *client, const gchar * period_id);
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guint gst_mpd_client_get_period_index (GstMpdClient *client);
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const gchar *gst_mpd_client_get_period_id (GstMpdClient *client);
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gboolean gst_mpd_client_has_next_period (GstMpdClient *client);
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gboolean gst_mpd_client_has_previous_period (GstMpdClient * client);
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/* Representation selection */
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gint gst_mpdparser_get_rep_idx_with_max_bandwidth (GList *Representations, gint max_bandwidth);
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gint gst_mpdparser_get_rep_idx_with_min_bandwidth (GList * Representations);
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/* URL management */
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const gchar *gst_mpdparser_get_baseURL (GstMpdClient *client, guint indexStream);
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gboolean gst_mpdparser_get_chunk_by_index (GstMpdClient *client, guint indexStream, guint indexChunk, GstMediaSegment * segment);
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/* Active stream */
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guint gst_mpdparser_get_nb_active_stream (GstMpdClient *client);
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GstActiveStream *gst_mpdparser_get_active_stream_by_index (GstMpdClient *client, guint stream_idx);
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/* AdaptationSet */
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guint gst_mpdparser_get_nb_adaptationSet (GstMpdClient *client);
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GList * gst_mpd_client_get_adaptation_sets (GstMpdClient * client);
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/* Segment */
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gboolean gst_mpd_client_has_next_segment (GstMpdClient * client, GstActiveStream * stream, gboolean forward);
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GstFlowReturn gst_mpd_client_advance_segment (GstMpdClient * client, GstActiveStream * stream, gboolean forward);
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void gst_mpd_client_seek_to_first_segment (GstMpdClient * client);
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GstDateTime *gst_mpd_client_get_next_segment_availability_end_time (GstMpdClient * client, GstActiveStream * stream);
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/* Get audio/video stream parameters (mimeType, width, height, rate, number of channels) */
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const gchar *gst_mpd_client_get_stream_mimeType (GstActiveStream * stream);
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gboolean gst_mpd_client_get_bitstream_switching_flag (GstActiveStream * stream);
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guint gst_mpd_client_get_video_stream_width (GstActiveStream * stream);
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guint gst_mpd_client_get_video_stream_height (GstActiveStream * stream);
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guint gst_mpd_client_get_audio_stream_rate (GstActiveStream * stream);
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guint gst_mpd_client_get_audio_stream_num_channels (GstActiveStream * stream);
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/* Support multi language */
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guint gst_mpdparser_get_list_and_nb_of_audio_language (GstMpdClient *client, GList **lang);
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gint64 gst_mpd_client_calculate_time_difference (const GstDateTime * t1, const GstDateTime * t2);
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GstDateTime *gst_mpd_client_add_time_difference (GstDateTime * t1, gint64 usecs);
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/* profiles */
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gboolean gst_mpd_client_has_isoff_ondemand_profile (GstMpdClient *client);
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G_END_DECLS
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#endif /* __GST_MPDPARSER_H__ */
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