/* GStreamer * Copyright (C) 2011 Alessandro Decina <alessandro.d@gmail.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. */ /** * SECTION:element-hlssink * @title: hlssink * * HTTP Live Streaming sink/server * * ## Example launch line * |[ * gst-launch-1.0 videotestsrc is-live=true ! x264enc ! mpegtsmux ! hlssink max-files=5 * ]| * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include "gsthlssink.h" #include <gst/pbutils/pbutils.h> #include <gst/video/video.h> #include <glib/gstdio.h> #include <memory.h> GST_DEBUG_CATEGORY_STATIC (gst_hls_sink_debug); #define GST_CAT_DEFAULT gst_hls_sink_debug #define DEFAULT_LOCATION "segment%05d.ts" #define DEFAULT_PLAYLIST_LOCATION "playlist.m3u8" #define DEFAULT_PLAYLIST_ROOT NULL #define DEFAULT_MAX_FILES 10 #define DEFAULT_TARGET_DURATION 15 #define DEFAULT_PLAYLIST_LENGTH 5 #define GST_M3U8_PLAYLIST_VERSION 3 enum { PROP_0, PROP_LOCATION, PROP_PLAYLIST_LOCATION, PROP_PLAYLIST_ROOT, PROP_MAX_FILES, PROP_TARGET_DURATION, PROP_PLAYLIST_LENGTH }; static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS_ANY); #define gst_hls_sink_parent_class parent_class G_DEFINE_TYPE (GstHlsSink, gst_hls_sink, GST_TYPE_BIN); static void gst_hls_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * spec); static void gst_hls_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * spec); static void gst_hls_sink_handle_message (GstBin * bin, GstMessage * message); static GstPadProbeReturn gst_hls_sink_ghost_event_probe (GstPad * pad, GstPadProbeInfo * info, gpointer data); static GstPadProbeReturn gst_hls_sink_ghost_buffer_probe (GstPad * pad, GstPadProbeInfo * info, gpointer data); static void gst_hls_sink_reset (GstHlsSink * sink); static GstStateChangeReturn gst_hls_sink_change_state (GstElement * element, GstStateChange trans); static gboolean schedule_next_key_unit (GstHlsSink * sink); static GstFlowReturn gst_hls_sink_chain_list (GstPad * pad, GstObject * parent, GstBufferList * list); static void gst_hls_sink_dispose (GObject * object) { GstHlsSink *sink = GST_HLS_SINK_CAST (object); G_OBJECT_CLASS (parent_class)->dispose ((GObject *) sink); } static void gst_hls_sink_finalize (GObject * object) { GstHlsSink *sink = GST_HLS_SINK_CAST (object); g_free (sink->location); g_free (sink->playlist_location); g_free (sink->playlist_root); if (sink->playlist) gst_m3u8_playlist_free (sink->playlist); G_OBJECT_CLASS (parent_class)->finalize ((GObject *) sink); } static void gst_hls_sink_class_init (GstHlsSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *element_class; GstBinClass *bin_class; gobject_class = (GObjectClass *) klass; element_class = GST_ELEMENT_CLASS (klass); bin_class = GST_BIN_CLASS (klass); gst_element_class_add_static_pad_template (element_class, &sink_template); gst_element_class_set_static_metadata (element_class, "HTTP Live Streaming sink", "Sink", "HTTP Live Streaming sink", "Alessandro Decina <alessandro.d@gmail.com>"); element_class->change_state = GST_DEBUG_FUNCPTR (gst_hls_sink_change_state); bin_class->handle_message = gst_hls_sink_handle_message; gobject_class->dispose = gst_hls_sink_dispose; gobject_class->finalize = gst_hls_sink_finalize; gobject_class->set_property = gst_hls_sink_set_property; gobject_class->get_property = gst_hls_sink_get_property; g_object_class_install_property (gobject_class, PROP_LOCATION, g_param_spec_string ("location", "File Location", "Location of the file to write", DEFAULT_LOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PLAYLIST_LOCATION, g_param_spec_string ("playlist-location", "Playlist Location", "Location of the playlist to write", DEFAULT_PLAYLIST_LOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PLAYLIST_ROOT, g_param_spec_string ("playlist-root", "Playlist Root", "Location of the playlist to write", DEFAULT_PLAYLIST_ROOT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_MAX_FILES, g_param_spec_uint ("max-files", "Max files", "Maximum number of files to keep on disk. Once the maximum is reached," "old files start to be deleted to make room for new ones.", 0, G_MAXUINT, DEFAULT_MAX_FILES, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_TARGET_DURATION, g_param_spec_uint ("target-duration", "Target duration", "The target duration in seconds of a segment/file. " "(0 - disabled, useful for management of segment duration by the " "streaming server)", 0, G_MAXUINT, DEFAULT_TARGET_DURATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PLAYLIST_LENGTH, g_param_spec_uint ("playlist-length", "Playlist length", "Length of HLS playlist. To allow players to conform to section 6.3.3 " "of the HLS specification, this should be at least 3. If set to 0, " "the playlist will be infinite.", 0, G_MAXUINT, DEFAULT_PLAYLIST_LENGTH, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); } static void gst_hls_sink_init (GstHlsSink * sink) { GstPadTemplate *templ = gst_static_pad_template_get (&sink_template); sink->ghostpad = gst_ghost_pad_new_no_target_from_template ("sink", templ); gst_object_unref (templ); gst_element_add_pad (GST_ELEMENT_CAST (sink), sink->ghostpad); gst_pad_add_probe (sink->ghostpad, GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, gst_hls_sink_ghost_event_probe, sink, NULL); gst_pad_add_probe (sink->ghostpad, GST_PAD_PROBE_TYPE_BUFFER, gst_hls_sink_ghost_buffer_probe, sink, NULL); gst_pad_set_chain_list_function (sink->ghostpad, gst_hls_sink_chain_list); sink->location = g_strdup (DEFAULT_LOCATION); sink->playlist_location = g_strdup (DEFAULT_PLAYLIST_LOCATION); sink->playlist_root = g_strdup (DEFAULT_PLAYLIST_ROOT); sink->playlist_length = DEFAULT_PLAYLIST_LENGTH; sink->max_files = DEFAULT_MAX_FILES; sink->target_duration = DEFAULT_TARGET_DURATION; /* haven't added a sink yet, make it is detected as a sink meanwhile */ GST_OBJECT_FLAG_SET (sink, GST_ELEMENT_FLAG_SINK); gst_hls_sink_reset (sink); } static void gst_hls_sink_reset (GstHlsSink * sink) { sink->index = 0; sink->last_running_time = 0; sink->waiting_fku = FALSE; gst_event_replace (&sink->force_key_unit_event, NULL); gst_segment_init (&sink->segment, GST_FORMAT_UNDEFINED); if (sink->playlist) gst_m3u8_playlist_free (sink->playlist); sink->playlist = gst_m3u8_playlist_new (GST_M3U8_PLAYLIST_VERSION, sink->playlist_length, FALSE); sink->state = GST_M3U8_PLAYLIST_RENDER_INIT; } static gboolean gst_hls_sink_create_elements (GstHlsSink * sink) { GstPad *pad = NULL; GST_DEBUG_OBJECT (sink, "Creating internal elements"); if (sink->elements_created) return TRUE; sink->multifilesink = gst_element_factory_make ("multifilesink", NULL); if (sink->multifilesink == NULL) goto missing_element; g_object_set (sink->multifilesink, "location", sink->location, "next-file", 3, "post-messages", TRUE, "max-files", sink->max_files, NULL); gst_bin_add (GST_BIN_CAST (sink), sink->multifilesink); pad = gst_element_get_static_pad (sink->multifilesink, "sink"); gst_ghost_pad_set_target (GST_GHOST_PAD (sink->ghostpad), pad); gst_object_unref (pad); sink->elements_created = TRUE; return TRUE; missing_element: gst_element_post_message (GST_ELEMENT_CAST (sink), gst_missing_element_message_new (GST_ELEMENT_CAST (sink), "multifilesink")); GST_ELEMENT_ERROR (sink, CORE, MISSING_PLUGIN, (("Missing element '%s' - check your GStreamer installation."), "multifilesink"), (NULL)); return FALSE; } static void gst_hls_sink_write_playlist (GstHlsSink * sink) { char *playlist_content; GError *error = NULL; playlist_content = gst_m3u8_playlist_render (sink->playlist); if (!g_file_set_contents (sink->playlist_location, playlist_content, -1, &error)) { GST_ERROR ("Failed to write playlist: %s", error->message); GST_ELEMENT_ERROR (sink, RESOURCE, OPEN_WRITE, (("Failed to write playlist '%s'."), error->message), (NULL)); g_error_free (error); error = NULL; } g_free (playlist_content); } static void gst_hls_sink_handle_message (GstBin * bin, GstMessage * message) { GstHlsSink *sink = GST_HLS_SINK_CAST (bin); switch (message->type) { case GST_MESSAGE_ELEMENT: { const char *filename; GstClockTime running_time, duration; gboolean discont = FALSE; gchar *entry_location; const GstStructure *structure; structure = gst_message_get_structure (message); if (strcmp (gst_structure_get_name (structure), "GstMultiFileSink")) break; filename = gst_structure_get_string (structure, "filename"); gst_structure_get_clock_time (structure, "running-time", &running_time); duration = running_time - sink->last_running_time; sink->last_running_time = running_time; GST_INFO_OBJECT (sink, "COUNT %d", sink->index); if (sink->playlist_root == NULL) entry_location = g_path_get_basename (filename); else { gchar *name = g_path_get_basename (filename); entry_location = g_build_filename (sink->playlist_root, name, NULL); g_free (name); } gst_m3u8_playlist_add_entry (sink->playlist, entry_location, NULL, duration, sink->index, discont); g_free (entry_location); gst_hls_sink_write_playlist (sink); sink->state |= GST_M3U8_PLAYLIST_RENDER_STARTED; /* multifilesink is starting a new file. It means that upstream sent a key * unit and we can schedule the next key unit now. */ sink->waiting_fku = FALSE; schedule_next_key_unit (sink); /* multifilesink is an internal implementation detail. If applications * need a notification, we should probably do our own message */ GST_DEBUG_OBJECT (bin, "dropping message %" GST_PTR_FORMAT, message); gst_message_unref (message); message = NULL; break; } case GST_MESSAGE_EOS:{ sink->playlist->end_list = TRUE; gst_hls_sink_write_playlist (sink); sink->state |= GST_M3U8_PLAYLIST_RENDER_ENDED; break; } default: break; } if (message) GST_BIN_CLASS (parent_class)->handle_message (bin, message); } static GstStateChangeReturn gst_hls_sink_change_state (GstElement * element, GstStateChange trans) { GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GstHlsSink *sink = GST_HLS_SINK_CAST (element); switch (trans) { case GST_STATE_CHANGE_NULL_TO_READY: if (!gst_hls_sink_create_elements (sink)) { return GST_STATE_CHANGE_FAILURE; } break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, trans); switch (trans) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: /* drain playlist with #EXT-X-ENDLIST */ if (sink->playlist && (sink->state & GST_M3U8_PLAYLIST_RENDER_STARTED) && !(sink->state & GST_M3U8_PLAYLIST_RENDER_ENDED)) { sink->playlist->end_list = TRUE; gst_hls_sink_write_playlist (sink); } gst_hls_sink_reset (sink); break; case GST_STATE_CHANGE_READY_TO_NULL: gst_hls_sink_reset (sink); break; default: break; } return ret; } static void gst_hls_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstHlsSink *sink = GST_HLS_SINK_CAST (object); switch (prop_id) { case PROP_LOCATION: g_free (sink->location); sink->location = g_value_dup_string (value); if (sink->multifilesink) g_object_set (sink->multifilesink, "location", sink->location, NULL); break; case PROP_PLAYLIST_LOCATION: g_free (sink->playlist_location); sink->playlist_location = g_value_dup_string (value); break; case PROP_PLAYLIST_ROOT: g_free (sink->playlist_root); sink->playlist_root = g_value_dup_string (value); break; case PROP_MAX_FILES: sink->max_files = g_value_get_uint (value); if (sink->multifilesink) { g_object_set (sink->multifilesink, "location", sink->location, "next-file", 3, "post-messages", TRUE, "max-files", sink->max_files, NULL); } break; case PROP_TARGET_DURATION: sink->target_duration = g_value_get_uint (value); break; case PROP_PLAYLIST_LENGTH: sink->playlist_length = g_value_get_uint (value); sink->playlist->window_size = sink->playlist_length; break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_hls_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstHlsSink *sink = GST_HLS_SINK_CAST (object); switch (prop_id) { case PROP_LOCATION: g_value_set_string (value, sink->location); break; case PROP_PLAYLIST_LOCATION: g_value_set_string (value, sink->playlist_location); break; case PROP_PLAYLIST_ROOT: g_value_set_string (value, sink->playlist_root); break; case PROP_MAX_FILES: g_value_set_uint (value, sink->max_files); break; case PROP_TARGET_DURATION: g_value_set_uint (value, sink->target_duration); break; case PROP_PLAYLIST_LENGTH: g_value_set_uint (value, sink->playlist_length); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static GstPadProbeReturn gst_hls_sink_ghost_event_probe (GstPad * pad, GstPadProbeInfo * info, gpointer data) { GstHlsSink *sink = GST_HLS_SINK_CAST (data); GstEvent *event = gst_pad_probe_info_get_event (info); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_SEGMENT: { gst_event_copy_segment (event, &sink->segment); break; } case GST_EVENT_FLUSH_STOP: gst_segment_init (&sink->segment, GST_FORMAT_UNDEFINED); break; case GST_EVENT_CUSTOM_DOWNSTREAM: { GstClockTime timestamp; GstClockTime running_time, stream_time; gboolean all_headers; guint count; if (!gst_video_event_is_force_key_unit (event)) break; gst_event_replace (&sink->force_key_unit_event, event); gst_video_event_parse_downstream_force_key_unit (event, ×tamp, &stream_time, &running_time, &all_headers, &count); GST_INFO_OBJECT (sink, "setting index %d", count); sink->index = count; break; } default: break; } return GST_PAD_PROBE_OK; } static gboolean schedule_next_key_unit (GstHlsSink * sink) { gboolean res = TRUE; GstClockTime running_time; GstPad *sinkpad = gst_element_get_static_pad (GST_ELEMENT (sink), "sink"); if (sink->target_duration == 0) /* target-duration == 0 means that the app schedules key units itself */ goto out; running_time = sink->last_running_time + sink->target_duration * GST_SECOND; GST_INFO_OBJECT (sink, "sending upstream force-key-unit, index %d " "now %" GST_TIME_FORMAT " target %" GST_TIME_FORMAT, sink->index + 1, GST_TIME_ARGS (sink->last_running_time), GST_TIME_ARGS (running_time)); if (!(res = gst_pad_push_event (sinkpad, gst_video_event_new_upstream_force_key_unit (running_time, TRUE, sink->index + 1)))) { GST_ERROR_OBJECT (sink, "Failed to push upstream force key unit event"); } out: /* mark as waiting for a fku event if the app schedules them or if we just * successfully scheduled one */ sink->waiting_fku = res; gst_object_unref (sinkpad); return res; } static void gst_hls_sink_check_schedule_next_key_unit (GstHlsSink * sink, GstBuffer * buf) { GstClockTime timestamp; timestamp = GST_BUFFER_TIMESTAMP (buf); if (!GST_CLOCK_TIME_IS_VALID (timestamp)) return; sink->last_running_time = gst_segment_to_running_time (&sink->segment, GST_FORMAT_TIME, timestamp); schedule_next_key_unit (sink); } static GstPadProbeReturn gst_hls_sink_ghost_buffer_probe (GstPad * pad, GstPadProbeInfo * info, gpointer data) { GstHlsSink *sink = GST_HLS_SINK_CAST (data); GstBuffer *buffer = gst_pad_probe_info_get_buffer (info); if (sink->target_duration == 0 || sink->waiting_fku) return GST_PAD_PROBE_OK; gst_hls_sink_check_schedule_next_key_unit (sink, buffer); return GST_PAD_PROBE_OK; } static GstFlowReturn gst_hls_sink_chain_list (GstPad * pad, GstObject * parent, GstBufferList * list) { guint i, len; GstBuffer *buffer; GstFlowReturn ret; GstHlsSink *sink = GST_HLS_SINK_CAST (parent); if (sink->target_duration == 0 || sink->waiting_fku) return gst_proxy_pad_chain_list_default (pad, parent, list); GST_DEBUG_OBJECT (pad, "chaining each group in list as a merged buffer"); len = gst_buffer_list_length (list); ret = GST_FLOW_OK; for (i = 0; i < len; i++) { buffer = gst_buffer_list_get (list, i); if (!sink->waiting_fku) gst_hls_sink_check_schedule_next_key_unit (sink, buffer); ret = gst_pad_chain (pad, gst_buffer_ref (buffer)); if (ret != GST_FLOW_OK) break; } gst_buffer_list_unref (list); return ret; } gboolean gst_hls_sink_plugin_init (GstPlugin * plugin) { GST_DEBUG_CATEGORY_INIT (gst_hls_sink_debug, "hlssink", 0, "HlsSink"); return gst_element_register (plugin, "hlssink", GST_RANK_NONE, gst_hls_sink_get_type ()); }