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hlsdemux2: Add HLS playlist loader
Add a helper that asynchronously loads and refreshes the playlist for HLS streams. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
This commit is contained in:
Edward Hervey
GStreamer Marge Bot
parent
52d577eee1
commit
2c822735ba
5 changed files with 792 additions and 1 deletions
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@ -0,0 +1,678 @@
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/* GStreamer
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*
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* Copyright (C) 2014 Samsung Electronics. All rights reserved.
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* Author: Thiago Santos <thiagoss@osg.samsung.com>
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*
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* Copyright (C) 2021-2022 Centricular Ltd
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* Author: Edward Hervey <edward@centricular.com>
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* Author: Jan Schmidt <jan@centricular.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 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; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gsthlsdemux.h"
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#include "gsthlsdemux-playlist-loader.h"
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#include "m3u8.h"
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GST_DEBUG_CATEGORY_EXTERN (gst_hls_demux2_debug);
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#define GST_CAT_DEFAULT gst_hls_demux2_debug
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typedef enum _PlaylistLoaderState PlaylistLoaderState;
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enum _PlaylistLoaderState
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{
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PLAYLIST_LOADER_STATE_STOPPED = 0,
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PLAYLIST_LOADER_STATE_STARTING,
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PLAYLIST_LOADER_STATE_LOADING,
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PLAYLIST_LOADER_STATE_WAITING,
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};
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struct _GstHLSDemuxPlaylistLoaderPrivate
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{
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GstAdaptiveDemux *demux;
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gboolean llhls_enabled;
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GstHLSDemuxPlaylistLoaderSuccessCallback success_cb;
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GstHLSDemuxPlaylistLoaderErrorCallback error_cb;
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gpointer userdata;
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GstAdaptiveDemuxLoop *scheduler_task;
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DownloadHelper *download_helper;
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DownloadRequest *download_request;
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PlaylistLoaderState state;
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guint pending_cb_id;
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gchar *base_uri;
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gchar *target_playlist_uri;
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gchar *loading_playlist_uri;
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gboolean delta_merge_failed;
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gchar *current_playlist_uri;
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GstHLSMediaPlaylist *current_playlist;
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};
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#define gst_hls_demux_playlist_loader_parent_class parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstHLSDemuxPlaylistLoader,
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gst_hls_demux_playlist_loader, GST_TYPE_OBJECT);
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static void gst_hls_demux_playlist_loader_finalize (GObject * object);
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static gboolean gst_hls_demux_playlist_loader_update (GstHLSDemuxPlaylistLoader
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* pl);
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static void start_playlist_download (GstHLSDemuxPlaylistLoader * pl,
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GstHLSDemuxPlaylistLoaderPrivate * priv);
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/* Takes ownership of the loop ref */
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GstHLSDemuxPlaylistLoader *
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gst_hls_demux_playlist_loader_new (GstAdaptiveDemux * demux,
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DownloadHelper * download_helper, gboolean llhls_enabled)
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{
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GstHLSDemuxPlaylistLoader *pl =
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g_object_new (GST_TYPE_HLS_DEMUX_PLAYLIST_LOADER, NULL);
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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priv->demux = demux;
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priv->llhls_enabled = llhls_enabled;
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priv->scheduler_task = gst_adaptive_demux_get_loop (demux);
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priv->download_helper = download_helper;
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return pl;
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}
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void
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gst_hls_demux_playlist_loader_set_callbacks (GstHLSDemuxPlaylistLoader * pl,
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GstHLSDemuxPlaylistLoaderSuccessCallback success_cb,
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GstHLSDemuxPlaylistLoaderErrorCallback error_cb, gpointer userdata)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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priv->success_cb = success_cb;
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priv->error_cb = error_cb;
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priv->userdata = userdata;
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}
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static void
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gst_hls_demux_playlist_loader_class_init (GstHLSDemuxPlaylistLoaderClass *
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klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->finalize = gst_hls_demux_playlist_loader_finalize;
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}
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static void
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gst_hls_demux_playlist_loader_init (GstHLSDemuxPlaylistLoader * pl)
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{
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pl->priv = gst_hls_demux_playlist_loader_get_instance_private (pl);
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}
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static void
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gst_hls_demux_playlist_loader_finalize (GObject * object)
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{
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GstHLSDemuxPlaylistLoader *pl = GST_HLS_DEMUX_PLAYLIST_LOADER (object);
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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if (priv->pending_cb_id != 0) {
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gst_adaptive_demux_loop_cancel_call (priv->scheduler_task,
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priv->pending_cb_id);
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priv->pending_cb_id = 0;
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}
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if (priv->download_request) {
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downloadhelper_cancel_request (priv->download_helper,
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priv->download_request);
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download_request_unref (priv->download_request);
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priv->download_request = NULL;
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}
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if (priv->scheduler_task)
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gst_adaptive_demux_loop_unref (priv->scheduler_task);
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g_free (priv->base_uri);
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g_free (priv->target_playlist_uri);
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g_free (priv->loading_playlist_uri);
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if (priv->current_playlist)
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gst_hls_media_playlist_unref (priv->current_playlist);
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g_free (priv->current_playlist_uri);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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schedule_state_update (GstHLSDemuxPlaylistLoader * pl,
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GstHLSDemuxPlaylistLoaderPrivate * priv)
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{
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g_assert (priv->pending_cb_id == 0);
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priv->pending_cb_id =
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gst_adaptive_demux_loop_call (priv->scheduler_task,
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(GSourceFunc) gst_hls_demux_playlist_loader_update,
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gst_object_ref (pl), (GDestroyNotify) gst_object_unref);
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}
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static void
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schedule_next_playlist_load (GstHLSDemuxPlaylistLoader * pl,
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GstHLSDemuxPlaylistLoaderPrivate * priv, GstClockTime next_load_interval)
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{
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GST_LOG_OBJECT (pl, "Scheduling next playlist reload");
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g_assert (priv->pending_cb_id == 0);
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priv->state = PLAYLIST_LOADER_STATE_WAITING;
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priv->pending_cb_id =
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gst_adaptive_demux_loop_call_delayed (priv->scheduler_task,
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next_load_interval,
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(GSourceFunc) gst_hls_demux_playlist_loader_update,
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gst_object_ref (pl), (GDestroyNotify) gst_object_unref);
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}
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void
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gst_hls_demux_playlist_loader_start (GstHLSDemuxPlaylistLoader * pl)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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if (priv->state != PLAYLIST_LOADER_STATE_STOPPED)
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return; /* Already active */
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GST_DEBUG_OBJECT (pl, "Starting playlist loading");
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priv->state = PLAYLIST_LOADER_STATE_STARTING;
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schedule_state_update (pl, priv);
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}
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void
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gst_hls_demux_playlist_loader_stop (GstHLSDemuxPlaylistLoader * pl)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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if (priv->state == PLAYLIST_LOADER_STATE_STOPPED)
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return; /* Not runnning */
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GST_DEBUG_OBJECT (pl, "Stopping playlist loading");
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if (priv->pending_cb_id != 0) {
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gst_adaptive_demux_loop_cancel_call (priv->scheduler_task,
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priv->pending_cb_id);
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priv->pending_cb_id = 0;
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}
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if (priv->download_request) {
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downloadhelper_cancel_request (priv->download_helper,
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priv->download_request);
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download_request_unref (priv->download_request);
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priv->download_request = NULL;
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}
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}
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void
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gst_hls_demux_playlist_loader_set_playlist_uri (GstHLSDemuxPlaylistLoader * pl,
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const gchar * base_uri, const gchar * new_playlist_uri)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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gboolean playlist_uri_change = (priv->target_playlist_uri == NULL
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|| g_strcmp0 (new_playlist_uri, priv->target_playlist_uri) != 0);
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if (!playlist_uri_change)
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return;
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GST_DEBUG_OBJECT (pl, "Setting target playlist URI to %s", new_playlist_uri);
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g_free (priv->base_uri);
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g_free (priv->target_playlist_uri);
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priv->base_uri = g_strdup (base_uri);
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priv->target_playlist_uri = g_strdup (new_playlist_uri);
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priv->delta_merge_failed = FALSE;
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switch (priv->state) {
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case PLAYLIST_LOADER_STATE_STOPPED:
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return; /* Not runnning */
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case PLAYLIST_LOADER_STATE_STARTING:
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case PLAYLIST_LOADER_STATE_LOADING:
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/* If there's no pending state check, trigger one */
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if (priv->pending_cb_id == 0) {
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GST_LOG_OBJECT (pl, "Scheduling state update from state %d",
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priv->state);
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schedule_state_update (pl, priv);
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}
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break;
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case PLAYLIST_LOADER_STATE_WAITING:
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return; /* Already waiting for the next time to load a live playlist */
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}
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}
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/* Check that the current playlist matches the target URI, and return
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* a ref to it if so */
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GstHLSMediaPlaylist *
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gst_hls_demux_stream_get_playlist_for_uri (GstHLSDemuxPlaylistLoader * pl,
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const gchar * target_playlist_uri)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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if (priv->current_playlist == NULL
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|| !g_str_equal (target_playlist_uri, priv->current_playlist_uri))
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return NULL;
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return gst_hls_media_playlist_ref (priv->current_playlist);
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}
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enum PlaylistDownloadParamFlags
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{
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PLAYLIST_DOWNLOAD_FLAG_SKIP_V1 = (1 << 0),
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PLAYLIST_DOWNLOAD_FLAG_SKIP_V2 = (1 << 1), /* V2 also skips date-ranges */
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PLAYLIST_DOWNLOAD_FLAG_BLOCKING_REQUEST = (1 << 2),
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};
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struct PlaylistDownloadParams
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{
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enum PlaylistDownloadParamFlags flags;
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gint64 next_msn, next_part;
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};
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#define HLS_SKIP_QUERY_KEY "_HLS_skip"
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#define HLS_MSN_QUERY_KEY "_HLS_msn"
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#define HLS_PART_QUERY_KEY "_HLS_part"
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static gchar *
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apply_directives_to_uri (GstHLSDemuxPlaylistLoader * pl,
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const gchar * playlist_uri, struct PlaylistDownloadParams *dl_params)
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{
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GstUri *uri = gst_uri_from_string (playlist_uri);
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if (dl_params->flags & PLAYLIST_DOWNLOAD_FLAG_SKIP_V1) {
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GST_LOG_OBJECT (pl, "Doing HLS skip (v1) request");
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gst_uri_set_query_value (uri, HLS_SKIP_QUERY_KEY, "YES");
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} else if (dl_params->flags & PLAYLIST_DOWNLOAD_FLAG_SKIP_V2) {
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GST_LOG_OBJECT (pl, "Doing HLS skip (v2) request");
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gst_uri_set_query_value (uri, HLS_SKIP_QUERY_KEY, "v2");
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} else {
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gst_uri_remove_query_key (uri, HLS_SKIP_QUERY_KEY);
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}
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if (dl_params->flags & PLAYLIST_DOWNLOAD_FLAG_BLOCKING_REQUEST
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&& dl_params->next_msn != -1) {
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GST_LOG_OBJECT (pl,
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"Doing HLS blocking request for URI %s with MSN %" G_GINT64_FORMAT
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" part %" G_GINT64_FORMAT, playlist_uri, dl_params->next_msn,
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dl_params->next_part);
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gchar *next_msn_str =
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g_strdup_printf ("%" G_GINT64_FORMAT, dl_params->next_msn);
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gst_uri_set_query_value (uri, HLS_MSN_QUERY_KEY, next_msn_str);
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g_free (next_msn_str);
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if (dl_params->next_part != -1) {
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gchar *next_part_str =
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g_strdup_printf ("%" G_GINT64_FORMAT, dl_params->next_part);
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gst_uri_set_query_value (uri, HLS_PART_QUERY_KEY, next_part_str);
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g_free (next_part_str);
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} else {
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gst_uri_remove_query_key (uri, HLS_PART_QUERY_KEY);
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}
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}
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/* Produce the resulting URI with query arguments in UTF-8 order
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* as required by the HLS spec:
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* `Clients using Delivery Directives (Section 6.2.5) MUST ensure that
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* all query parameters appear in UTF-8 order within the URI.`
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*/
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GList *keys = gst_uri_get_query_keys (uri);
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if (keys)
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keys = g_list_sort (keys, (GCompareFunc) g_strcmp0);
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gchar *out_uri = gst_uri_to_string_with_keys (uri, keys);
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gst_uri_unref (uri);
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return out_uri;
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}
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static GstClockTime
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get_playlist_reload_interval (GstHLSDemuxPlaylistLoader * pl,
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GstHLSDemuxPlaylistLoaderPrivate * priv, GstHLSMediaPlaylist * playlist)
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{
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if (playlist == NULL)
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return GST_CLOCK_TIME_NONE; /* No playlist yet */
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/* Use the most recent segment (or part segment) duration, as per
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* https://datatracker.ietf.org/doc/html/draft-pantos-hls-rfc8216bis-11#section-6.3.4
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*/
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GstClockTime target_duration = GST_CLOCK_TIME_NONE;
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GstClockTime min_reload_interval = playlist->targetduration / 2;
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if (playlist->segments->len) {
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GstM3U8MediaSegment *last_seg =
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g_ptr_array_index (playlist->segments, playlist->segments->len - 1);
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target_duration = last_seg->duration;
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if (priv->llhls_enabled && last_seg->partial_segments) {
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GstM3U8PartialSegment *last_part =
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g_ptr_array_index (last_seg->partial_segments,
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last_seg->partial_segments->len - 1);
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target_duration = last_part->duration;
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if (GST_CLOCK_TIME_IS_VALID (playlist->partial_targetduration)) {
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min_reload_interval = playlist->partial_targetduration / 2;
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} else {
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min_reload_interval = target_duration / 2;
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}
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}
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} else if (priv->llhls_enabled
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&& GST_CLOCK_TIME_IS_VALID (playlist->partial_targetduration)) {
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target_duration = playlist->partial_targetduration;
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min_reload_interval = target_duration / 2;
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} else if (playlist->version > 5) {
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target_duration = playlist->targetduration;
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}
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if (playlist->reloaded && target_duration > min_reload_interval) {
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GST_DEBUG_OBJECT (pl,
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"Playlist didn't change previously, returning lower update interval");
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target_duration = min_reload_interval;
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}
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return target_duration;
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}
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static void
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on_download_complete (DownloadRequest * download, DownloadRequestState state,
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GstHLSDemuxPlaylistLoader * pl)
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{
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GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
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if (priv->state != PLAYLIST_LOADER_STATE_LOADING) {
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GST_DEBUG_OBJECT (pl, "Loader state changed to %d. Aborting", priv->state);
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return;
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}
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if (!g_str_equal (priv->target_playlist_uri, priv->loading_playlist_uri)) {
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/* This callback happened just as the playlist URI was updated. There should be
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* a pending state update scheduled, but we can just kick off the new download
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* immediately */
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GST_DEBUG_OBJECT (pl,
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"Target playlist URI changed from %s to %s. Discarding download",
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priv->loading_playlist_uri, priv->target_playlist_uri);
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start_playlist_download (pl, priv);
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return;
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}
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GST_DEBUG_OBJECT (pl, "Handling completed playlist download for URI %s",
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download->uri);
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/* If we got a permanent redirect, use that as the new
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* playlist URI, otherwise set the base URI of the playlist
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* to the redirect target if any (NULL if there was no redirect) */
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GstHLSMediaPlaylist *playlist = NULL;
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gchar *base_uri, *uri;
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if (download->redirect_permanent && download->redirect_uri) {
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uri = g_strdup (download->redirect_uri);
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base_uri = NULL;
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} else {
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uri = g_strdup (download->uri);
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base_uri = g_strdup (download->redirect_uri);
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}
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/* FIXME: Strip HLS request params from the playlist and redirect URI */
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|
||||
/* Calculate the newest time we know this playlist was valid to store on the HLS Media Playlist */
|
||||
GstClockTime playlist_ts =
|
||||
MAX (0, GST_CLOCK_DIFF (download_request_get_age (download),
|
||||
download->download_start_time));
|
||||
|
||||
GstBuffer *buf = download_request_take_buffer (download);
|
||||
|
||||
/* there should be a buf if there wasn't an error (handled above) */
|
||||
g_assert (buf);
|
||||
|
||||
gchar *playlist_data = gst_hls_buf_to_utf8_text (buf);
|
||||
gst_buffer_unref (buf);
|
||||
|
||||
if (playlist_data == NULL) {
|
||||
GST_WARNING_OBJECT (pl, "Couldn't validate playlist encoding");
|
||||
goto delay_retry_out;
|
||||
}
|
||||
|
||||
GstHLSMediaPlaylist *current_playlist = priv->current_playlist;
|
||||
gboolean playlist_uri_change = (current_playlist == NULL
|
||||
|| g_strcmp0 (priv->loading_playlist_uri,
|
||||
priv->current_playlist_uri) != 0);
|
||||
|
||||
if (!playlist_uri_change && current_playlist
|
||||
&& gst_hls_media_playlist_has_same_data (current_playlist,
|
||||
playlist_data)) {
|
||||
GST_DEBUG_OBJECT (pl, "playlist data was unchanged");
|
||||
playlist = gst_hls_media_playlist_ref (current_playlist);
|
||||
playlist->reloaded = TRUE;
|
||||
g_free (playlist_data);
|
||||
} else {
|
||||
playlist =
|
||||
gst_hls_media_playlist_parse (playlist_data, playlist_ts, uri,
|
||||
base_uri);
|
||||
if (!playlist) {
|
||||
GST_WARNING_OBJECT (pl, "Couldn't parse playlist");
|
||||
}
|
||||
}
|
||||
|
||||
/* Transfer over any skipped segments from the current playlist if
|
||||
* we did a delta playlist update */
|
||||
if (!playlist_uri_change && current_playlist && playlist
|
||||
&& playlist->skipped_segments > 0) {
|
||||
if (!gst_hls_media_playlist_sync_skipped_segments (playlist,
|
||||
current_playlist)) {
|
||||
GST_DEBUG_OBJECT (pl,
|
||||
"Could not merge delta update to playlist. Retrying with full request");
|
||||
|
||||
gst_hls_media_playlist_unref (playlist);
|
||||
|
||||
/* Delta playlist update failed. Load a full playlist */
|
||||
priv->delta_merge_failed = TRUE;
|
||||
start_playlist_download (pl, priv);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
g_free (priv->current_playlist_uri);
|
||||
if (priv->current_playlist)
|
||||
gst_hls_media_playlist_unref (priv->current_playlist);
|
||||
|
||||
/* FIXME: If there was a redirect, use that for the next update */
|
||||
priv->current_playlist_uri = g_strdup (priv->loading_playlist_uri);
|
||||
priv->current_playlist = playlist;
|
||||
|
||||
if (priv->success_cb)
|
||||
priv->success_cb (pl, priv->current_playlist_uri, priv->current_playlist,
|
||||
priv->userdata);
|
||||
|
||||
g_free (priv->loading_playlist_uri);
|
||||
priv->loading_playlist_uri = NULL;
|
||||
|
||||
if (gst_hls_media_playlist_is_live (playlist)) {
|
||||
/* Schedule the next playlist load. If we can do a blocking load,
|
||||
* do it immediately, otherwise delayed */
|
||||
if (playlist->can_block_reload) {
|
||||
start_playlist_download (pl, priv);
|
||||
} else {
|
||||
GstClockTime delay = get_playlist_reload_interval (pl, priv, playlist);
|
||||
schedule_next_playlist_load (pl, priv, delay);
|
||||
}
|
||||
}
|
||||
|
||||
out:
|
||||
g_free (uri);
|
||||
g_free (base_uri);
|
||||
return;
|
||||
|
||||
delay_retry_out:
|
||||
/* Got invalid playlist data, retry soon */
|
||||
schedule_next_playlist_load (pl, priv, 100 * GST_MSECOND);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void
|
||||
on_download_error (DownloadRequest * download, DownloadRequestState state,
|
||||
GstHLSDemuxPlaylistLoader * pl)
|
||||
{
|
||||
GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
|
||||
|
||||
if (priv->state != PLAYLIST_LOADER_STATE_LOADING) {
|
||||
GST_DEBUG_OBJECT (pl, "Loader state changed to %d. Aborting", priv->state);
|
||||
return;
|
||||
}
|
||||
|
||||
GST_WARNING_OBJECT (pl,
|
||||
"Couldn't retrieve playlist, got HTTP status code %d",
|
||||
download->status_code);
|
||||
|
||||
if (priv->error_cb)
|
||||
priv->error_cb (pl, priv->loading_playlist_uri, priv->userdata);
|
||||
|
||||
start_playlist_download (pl, priv);
|
||||
}
|
||||
|
||||
static void
|
||||
start_playlist_download (GstHLSDemuxPlaylistLoader * pl,
|
||||
GstHLSDemuxPlaylistLoaderPrivate * priv)
|
||||
{
|
||||
gboolean allow_skip = !priv->delta_merge_failed;
|
||||
|
||||
const gchar *base_uri = priv->base_uri;
|
||||
const gchar *orig_uri = priv->target_playlist_uri;
|
||||
|
||||
/* Can't download yet */
|
||||
if (orig_uri == NULL)
|
||||
return;
|
||||
|
||||
struct PlaylistDownloadParams dl_params = { 0, };
|
||||
|
||||
GstHLSMediaPlaylist *current_playlist = priv->current_playlist;
|
||||
|
||||
/* If there's no previous playlist, or the URI changed this
|
||||
* is not a refresh/update but a switch to a new playlist */
|
||||
gboolean playlist_uri_change = (current_playlist == NULL
|
||||
|| g_strcmp0 (orig_uri, priv->current_playlist_uri) != 0);
|
||||
|
||||
if (!playlist_uri_change) {
|
||||
GST_LOG_OBJECT (pl, "Updating the playlist");
|
||||
|
||||
/* See if we can do a delta playlist update (if the playlist age is less than
|
||||
* one half of the Skip Boundary */
|
||||
if (GST_CLOCK_TIME_IS_VALID (current_playlist->skip_boundary) && allow_skip) {
|
||||
GstClockTime now = gst_adaptive_demux2_get_monotonic_time (priv->demux);
|
||||
GstClockTimeDiff playlist_age =
|
||||
GST_CLOCK_DIFF (current_playlist->playlist_ts, now);
|
||||
|
||||
if (GST_CLOCK_TIME_IS_VALID (current_playlist->playlist_ts) &&
|
||||
playlist_age <= current_playlist->skip_boundary / 2) {
|
||||
if (current_playlist->can_skip_dateranges) {
|
||||
dl_params.flags |= PLAYLIST_DOWNLOAD_FLAG_SKIP_V2;
|
||||
} else {
|
||||
dl_params.flags |= PLAYLIST_DOWNLOAD_FLAG_SKIP_V1;
|
||||
}
|
||||
}
|
||||
} else if (GST_CLOCK_TIME_IS_VALID (current_playlist->skip_boundary)) {
|
||||
GST_DEBUG_OBJECT (pl,
|
||||
"Doing full playlist update after failed delta request");
|
||||
}
|
||||
}
|
||||
|
||||
/* Blocking playlist reload check */
|
||||
if (current_playlist != NULL && current_playlist->can_block_reload) {
|
||||
if (playlist_uri_change) {
|
||||
/* FIXME: We're changing playlist, but if there's a EXT-X-RENDITION-REPORT
|
||||
* for the new playlist we might be able to use it to do a blocking request */
|
||||
} else {
|
||||
/* Get the next MSN (and/or possibly part number) for the request params */
|
||||
gst_hls_media_playlist_get_next_msn_and_part (current_playlist,
|
||||
priv->llhls_enabled, &dl_params.next_msn, &dl_params.next_part);
|
||||
dl_params.flags |= PLAYLIST_DOWNLOAD_FLAG_BLOCKING_REQUEST;
|
||||
}
|
||||
}
|
||||
|
||||
gchar *target_uri = apply_directives_to_uri (pl, orig_uri, &dl_params);
|
||||
|
||||
if (priv->download_request == NULL) {
|
||||
priv->download_request = download_request_new_uri (target_uri);
|
||||
|
||||
download_request_set_callbacks (priv->download_request,
|
||||
(DownloadRequestEventCallback) on_download_complete,
|
||||
(DownloadRequestEventCallback) on_download_error,
|
||||
(DownloadRequestEventCallback) NULL,
|
||||
(DownloadRequestEventCallback) NULL, pl);
|
||||
} else {
|
||||
download_request_set_uri (priv->download_request, target_uri, 0, -1);
|
||||
}
|
||||
|
||||
GST_DEBUG_OBJECT (pl, "Submitting playlist download request for URI %s",
|
||||
target_uri);
|
||||
g_free (target_uri);
|
||||
|
||||
g_free (priv->loading_playlist_uri);
|
||||
priv->loading_playlist_uri = g_strdup (orig_uri);
|
||||
priv->state = PLAYLIST_LOADER_STATE_LOADING;
|
||||
|
||||
if (!downloadhelper_submit_request (priv->download_helper,
|
||||
base_uri, DOWNLOAD_FLAG_COMPRESS | DOWNLOAD_FLAG_FORCE_REFRESH,
|
||||
priv->download_request, NULL)) {
|
||||
/* Failed to submit the download - could be invalid URI, but
|
||||
* could just mean the download helper was stopped */
|
||||
priv->state = PLAYLIST_LOADER_STATE_STOPPED;
|
||||
}
|
||||
}
|
||||
|
||||
static gboolean
|
||||
gst_hls_demux_playlist_loader_update (GstHLSDemuxPlaylistLoader * pl)
|
||||
{
|
||||
GstHLSDemuxPlaylistLoaderPrivate *priv = pl->priv;
|
||||
|
||||
GST_LOG_OBJECT (pl, "Updating at state %d", priv->state);
|
||||
priv->pending_cb_id = 0;
|
||||
|
||||
switch (priv->state) {
|
||||
case PLAYLIST_LOADER_STATE_STOPPED:
|
||||
break;
|
||||
case PLAYLIST_LOADER_STATE_STARTING:
|
||||
if (priv->target_playlist_uri)
|
||||
start_playlist_download (pl, priv);
|
||||
break;
|
||||
case PLAYLIST_LOADER_STATE_LOADING:
|
||||
/* A download is in progress, but if we reach here it's
|
||||
* because the target playlist URI got updated, so check
|
||||
* for cancelling the current download. */
|
||||
if (g_str_equal (priv->target_playlist_uri, priv->current_playlist_uri))
|
||||
break;
|
||||
|
||||
/* A download is in progress. Cancel it and trigger a new one */
|
||||
if (priv->download_request) {
|
||||
GST_DEBUG_OBJECT (pl,
|
||||
"Playlist URI changed from %s to %s. Cancelling current download",
|
||||
priv->target_playlist_uri, priv->current_playlist_uri);
|
||||
downloadhelper_cancel_request (priv->download_helper,
|
||||
priv->download_request);
|
||||
download_request_unref (priv->download_request);
|
||||
priv->download_request = NULL;
|
||||
}
|
||||
start_playlist_download (pl, priv);
|
||||
break;
|
||||
case PLAYLIST_LOADER_STATE_WAITING:
|
||||
/* We were waiting until time to load a playlist. Load it now */
|
||||
start_playlist_download (pl, priv);
|
||||
break;
|
||||
}
|
||||
|
||||
return G_SOURCE_REMOVE;
|
||||
}
|
||||
|
|
@ -0,0 +1,80 @@
|
|||
/* 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_HLS_DEMUX_PLAYLIST_LOADER_H_
|
||||
#define _GST_HLS_DEMUX_PLAYLIST_LOADER_H_
|
||||
|
||||
#include <gst/gst.h>
|
||||
#include "gstadaptivedemux.h"
|
||||
#include "gstadaptivedemuxutils.h"
|
||||
#include "downloadhelper.h"
|
||||
#include "downloadrequest.h"
|
||||
|
||||
G_BEGIN_DECLS
|
||||
|
||||
#define GST_TYPE_HLS_DEMUX_PLAYLIST_LOADER (gst_hls_demux_playlist_loader_get_type())
|
||||
#define GST_HLS_DEMUX_PLAYLIST_LOADER(obj) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_HLS_DEMUX_PLAYLIST_LOADER,GstHLSDemuxPlaylistLoader))
|
||||
#define GST_HLS_DEMUX_PLAYLIST_LOADER_CAST(obj) ((GstHLSDemuxPlaylistLoader *)obj)
|
||||
|
||||
typedef struct _GstHLSDemuxPlaylistLoader GstHLSDemuxPlaylistLoader;
|
||||
typedef struct _GstHLSDemuxPlaylistLoaderClass GstHLSDemuxPlaylistLoaderClass;
|
||||
typedef struct _GstHLSDemuxPlaylistLoaderPrivate GstHLSDemuxPlaylistLoaderPrivate;
|
||||
|
||||
typedef void (*GstHLSDemuxPlaylistLoaderSuccessCallback) (GstHLSDemuxPlaylistLoader *pl,
|
||||
const gchar *playlist_uri, GstHLSMediaPlaylist *new_playlist, gpointer userdata);
|
||||
typedef void (*GstHLSDemuxPlaylistLoaderErrorCallback) (GstHLSDemuxPlaylistLoader *pl,
|
||||
const gchar *playlist_uri, gpointer userdata);
|
||||
|
||||
struct _GstHLSDemuxPlaylistLoaderClass
|
||||
{
|
||||
GstObjectClass parent_class;
|
||||
};
|
||||
|
||||
struct _GstHLSDemuxPlaylistLoader
|
||||
{
|
||||
GstObject object;
|
||||
GstHLSDemuxPlaylistLoaderPrivate *priv;
|
||||
};
|
||||
|
||||
GType gst_hls_demux_playlist_loader_get_type(void);
|
||||
|
||||
GstHLSDemuxPlaylistLoader *gst_hls_demux_playlist_loader_new(GstAdaptiveDemux *demux,
|
||||
DownloadHelper *download_helper, gboolean llhls_enabled);
|
||||
|
||||
void gst_hls_demux_playlist_loader_set_callbacks (GstHLSDemuxPlaylistLoader *pl,
|
||||
GstHLSDemuxPlaylistLoaderSuccessCallback success_cb,
|
||||
GstHLSDemuxPlaylistLoaderErrorCallback error_cb,
|
||||
gpointer userdata);
|
||||
|
||||
void gst_hls_demux_playlist_loader_start (GstHLSDemuxPlaylistLoader *pl);
|
||||
void gst_hls_demux_playlist_loader_stop (GstHLSDemuxPlaylistLoader *pl);
|
||||
|
||||
void gst_hls_demux_playlist_loader_set_playlist_uri (GstHLSDemuxPlaylistLoader *pl,
|
||||
const gchar *base_uri, const gchar *current_playlist_uri);
|
||||
GstHLSMediaPlaylist *gst_hls_demux_stream_get_playlist_for_uri (GstHLSDemuxPlaylistLoader *pl,
|
||||
const gchar *target_playlist_uri);
|
||||
|
||||
G_END_DECLS
|
||||
#endif
|
||||
|
|
@ -1056,6 +1056,12 @@ gst_hls_demux_stream_finalize (GObject * object)
|
|||
gst_buffer_replace (&hls_stream->pending_typefind_buffer, NULL);
|
||||
gst_buffer_replace (&hls_stream->pending_segment_data, NULL);
|
||||
|
||||
if (hls_stream->playlistloader) {
|
||||
gst_hls_demux_playlist_loader_stop (hls_stream->playlistloader);
|
||||
gst_object_unparent (GST_OBJECT (hls_stream->playlistloader));
|
||||
gst_object_unref (hls_stream->playlistloader);
|
||||
}
|
||||
|
||||
if (hls_stream->preloader) {
|
||||
gst_hls_demux_preloader_free (hls_stream->preloader);
|
||||
hls_stream->preloader = NULL;
|
||||
|
|
@ -1225,7 +1231,7 @@ struct PlaylistDownloadParams
|
|||
#define HLS_MSN_QUERY_KEY "_HLS_msn"
|
||||
#define HLS_PART_QUERY_KEY "_HLS_part"
|
||||
|
||||
gchar *
|
||||
static gchar *
|
||||
apply_directives_to_uri (GstHLSDemuxStream * stream,
|
||||
const gchar * playlist_uri, struct PlaylistDownloadParams *dl_params)
|
||||
{
|
||||
|
|
@ -1288,6 +1294,11 @@ download_media_playlist (GstHLSDemuxStream * stream, gchar * orig_uri,
|
|||
const gchar *main_uri = gst_adaptive_demux_get_manifest_ref_uri (demux);
|
||||
struct PlaylistDownloadParams dl_params;
|
||||
|
||||
/* FIXME: Set this URI when the variant is changed */
|
||||
if (stream->playlistloader)
|
||||
gst_hls_demux_playlist_loader_set_playlist_uri (stream->playlistloader,
|
||||
main_uri, orig_uri);
|
||||
|
||||
retry:
|
||||
|
||||
memset (&dl_params, 0, sizeof (struct PlaylistDownloadParams));
|
||||
|
|
@ -2014,6 +2025,18 @@ gst_hls_demux_stream_start (GstAdaptiveDemux2Stream * stream)
|
|||
if (!gst_hls_demux_stream_can_start (stream))
|
||||
return;
|
||||
|
||||
/* Start the playlist loader */
|
||||
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
|
||||
|
||||
if (hls_stream->playlistloader == NULL) {
|
||||
GstAdaptiveDemux *demux = stream->demux;
|
||||
|
||||
hls_stream->playlistloader =
|
||||
gst_hls_demux_playlist_loader_new (demux, demux->download_helper,
|
||||
hls_stream->llhls_enabled);
|
||||
}
|
||||
gst_hls_demux_playlist_loader_start (hls_stream->playlistloader);
|
||||
|
||||
/* Chain up, to start the downloading */
|
||||
GST_ADAPTIVE_DEMUX2_STREAM_CLASS (stream_parent_class)->start (stream);
|
||||
}
|
||||
|
|
@ -2021,6 +2044,11 @@ gst_hls_demux_stream_start (GstAdaptiveDemux2Stream * stream)
|
|||
static void
|
||||
gst_hls_demux_stream_stop (GstAdaptiveDemux2Stream * stream)
|
||||
{
|
||||
GstHLSDemuxStream *hls_stream = GST_HLS_DEMUX_STREAM_CAST (stream);
|
||||
|
||||
if (hls_stream->playlistloader)
|
||||
gst_hls_demux_playlist_loader_stop (hls_stream->playlistloader);
|
||||
|
||||
/* Chain up, to stop the downloading */
|
||||
GST_ADAPTIVE_DEMUX2_STREAM_CLASS (stream_parent_class)->stop (stream);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -30,6 +30,7 @@
|
|||
#include <gstadaptivedemux.h>
|
||||
#include "gsthlsdemux.h"
|
||||
#include "gsthlsdemux-preloader.h"
|
||||
#include "gsthlsdemux-playlist-loader.h"
|
||||
|
||||
#if defined(HAVE_OPENSSL)
|
||||
#include <openssl/evp.h>
|
||||
|
|
@ -86,6 +87,9 @@ struct _GstHLSDemuxStream
|
|||
gboolean playlist_fetched;
|
||||
GstClockTime playlist_last_update_time;
|
||||
|
||||
/* Playlist loading helper */
|
||||
GstHLSDemuxPlaylistLoader *playlistloader;
|
||||
|
||||
/* The media playlist currently used */
|
||||
GstHLSMediaPlaylist *playlist;
|
||||
|
||||
|
|
|
|||
|
|
@ -1,6 +1,7 @@
|
|||
hls_sources = [
|
||||
'hls/gsthlsdemux.c',
|
||||
'hls/gsthlsdemux-stream.c',
|
||||
'hls/gsthlsdemux-playlist-loader.c',
|
||||
'hls/gsthlsdemux-preloader.c',
|
||||
'hls/gsthlsdemux-util.c',
|
||||
'hls/gsthlselement.c',
|
||||
|
|
|
|||
Loading…
Reference in a new issue