mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-27 04:01:08 +00:00
hlsdemux: Implement trick modes via I-frame variant lists
This commit is contained in:
Sebastian Dröge
parent
77231ab957
commit
91ec00a0c0
3 changed files with 109 additions and 36 deletions
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@ -114,6 +114,9 @@ static gboolean gst_hls_demux_set_location (GstHLSDemux * demux,
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const gchar * uri);
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static gchar *gst_hls_src_buf_to_utf8_playlist (GstBuffer * buf);
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static gboolean gst_hls_demux_change_playlist (GstHLSDemux * demux,
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guint max_bitrate);
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#define gst_hls_demux_parent_class parent_class
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G_DEFINE_TYPE (GstHLSDemux, gst_hls_demux, GST_TYPE_ELEMENT);
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@ -332,7 +335,7 @@ gst_hls_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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gint64 start, stop;
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GList *walk;
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GstClockTime current_pos, target_pos;
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gint current_sequence;
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gint64 current_sequence;
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GstM3U8MediaFile *file;
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GST_INFO_OBJECT (demux, "Received GST_EVENT_SEEK");
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@ -351,15 +354,67 @@ gst_hls_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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return FALSE;
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}
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if ((rate > 1.0 || rate < -1.0) && (!demux->client->main
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|| !demux->client->main->iframe_lists)) {
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GST_ERROR_OBJECT (demux,
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"Trick modes only allowed for streams with I-frame lists");
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gst_event_unref (event);
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return FALSE;
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}
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GST_DEBUG_OBJECT (demux, "seek event, rate: %f start: %" GST_TIME_FORMAT
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" stop: %" GST_TIME_FORMAT, rate, GST_TIME_ARGS (start),
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GST_TIME_ARGS (stop));
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gst_hls_demux_pause_tasks (demux);
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/* wait for streaming to finish */
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g_rec_mutex_lock (&demux->updates_lock);
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g_rec_mutex_unlock (&demux->updates_lock);
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g_rec_mutex_lock (&demux->stream_lock);
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/* Use I-frame variants for trick modes */
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if ((rate > 1.0 || rate < -1.0) && demux->segment.rate >= -1.0
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&& demux->segment.rate <= 1.0) {
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GST_M3U8_CLIENT_LOCK (demux->client);
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/* Switch to I-frame variant */
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demux->client->main->current_variant =
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demux->client->main->iframe_lists;
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GST_M3U8_CLIENT_UNLOCK (demux->client);
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gst_m3u8_client_set_current (demux->client,
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demux->client->main->iframe_lists->data);
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gst_uri_downloader_reset (demux->downloader);
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gst_hls_demux_update_playlist (demux, FALSE, NULL);
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demux->discont = TRUE;
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demux->do_typefind = TRUE;
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gst_hls_demux_change_playlist (demux,
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demux->current_download_rate * demux->bitrate_limit / ABS (rate));
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} else if (rate > -1.0 && rate <= 1.0 && (demux->segment.rate < -1.0
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|| demux->segment.rate > 1.0)) {
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GST_M3U8_CLIENT_LOCK (demux->client);
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/* Switch to normal variant */
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demux->client->main->current_variant = demux->client->main->lists;
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GST_M3U8_CLIENT_UNLOCK (demux->client);
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gst_m3u8_client_set_current (demux->client,
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demux->client->main->lists->data);
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gst_uri_downloader_reset (demux->downloader);
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gst_hls_demux_update_playlist (demux, FALSE, NULL);
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demux->discont = TRUE;
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demux->do_typefind = TRUE;
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gst_hls_demux_change_playlist (demux,
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demux->current_download_rate * demux->bitrate_limit);
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}
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GST_M3U8_CLIENT_LOCK (demux->client);
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file = GST_M3U8_MEDIA_FILE (demux->client->current->files->data);
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current_sequence = file->sequence;
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current_pos = 0;
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target_pos = (GstClockTime) start;
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target_pos = rate > 0 ? start : stop;
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/* FIXME: Here we need proper discont handling */
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for (walk = demux->client->current->files; walk; walk = walk->next) {
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file = walk->data;
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@ -383,16 +438,9 @@ gst_hls_demux_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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gst_pad_push_event (demux->srcpad, gst_event_new_flush_start ());
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}
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gst_hls_demux_pause_tasks (demux);
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/* wait for streaming to finish */
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g_rec_mutex_lock (&demux->updates_lock);
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g_rec_mutex_unlock (&demux->updates_lock);
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g_rec_mutex_lock (&demux->stream_lock);
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GST_M3U8_CLIENT_LOCK (demux->client);
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GST_DEBUG_OBJECT (demux, "seeking to sequence %d", current_sequence);
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GST_DEBUG_OBJECT (demux, "seeking to sequence %u",
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(guint) current_sequence);
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demux->client->sequence = current_sequence;
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demux->client->sequence_position = current_pos;
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GST_M3U8_CLIENT_UNLOCK (demux->client);
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@ -768,7 +816,7 @@ gst_hls_demux_stream_loop (GstHLSDemux * demux)
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/* Got a new fragment or not live anymore? */
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if (gst_m3u8_client_get_next_fragment (demux->client, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL, NULL)
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NULL, NULL, NULL, NULL, NULL, NULL, demux->segment.rate > 0)
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|| !gst_m3u8_client_is_live (demux->client))
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break;
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@ -809,7 +857,7 @@ gst_hls_demux_stream_loop (GstHLSDemux * demux)
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}
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} else {
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demux->download_failed_count = 0;
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gst_m3u8_client_advance_fragment (demux->client);
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gst_m3u8_client_advance_fragment (demux->client, demux->segment.rate > 0);
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if (demux->stop_updates_task) {
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g_object_unref (fragment);
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@ -1135,7 +1183,7 @@ gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update,
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* three fragments before the end of the list */
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if (updated && update == FALSE && demux->client->current &&
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gst_m3u8_client_is_live (demux->client)) {
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guint last_sequence;
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gint64 last_sequence;
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GST_M3U8_CLIENT_LOCK (demux->client);
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last_sequence =
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@ -1143,8 +1191,8 @@ gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update,
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data)->sequence;
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if (demux->client->sequence >= last_sequence - 3) {
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GST_DEBUG_OBJECT (demux, "Sequence is beyond playlist. Moving back to %d",
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last_sequence - 3);
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GST_DEBUG_OBJECT (demux, "Sequence is beyond playlist. Moving back to %u",
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(guint) (last_sequence - 3));
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demux->need_segment = TRUE;
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demux->client->sequence = last_sequence - 3;
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}
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@ -1211,7 +1259,11 @@ retry_failover_protection:
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GST_M3U8_CLIENT_UNLOCK (demux->client);
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gst_m3u8_client_set_current (demux->client, previous_variant->data);
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/* Try a lower bitrate (or stop if we just tried the lowest) */
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if (new_bandwidth ==
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if (GST_M3U8 (previous_variant->data)->iframe && new_bandwidth ==
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GST_M3U8 (g_list_first (demux->client->main->iframe_lists)->
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data)->bandwidth)
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return FALSE;
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else if (!GST_M3U8 (previous_variant->data)->iframe && new_bandwidth ==
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GST_M3U8 (g_list_first (demux->client->main->lists)->data)->bandwidth)
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return FALSE;
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else
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@ -1421,7 +1473,7 @@ gst_hls_demux_get_next_fragment (GstHLSDemux * demux,
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*end_of_playlist = FALSE;
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if (!gst_m3u8_client_get_next_fragment (demux->client, &discont,
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&next_fragment_uri, &duration, ×tamp, &range_start, &range_end,
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&key, &iv)) {
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&key, &iv, demux->segment.rate > 0)) {
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GST_INFO_OBJECT (demux, "This playlist doesn't contain more fragments");
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*end_of_playlist = TRUE;
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return NULL;
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@ -558,7 +558,7 @@ gst_m3u8_update (GstM3U8 * self, gchar * data, gboolean * updated)
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data = g_utf8_next_char (end); /* skip \n */
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}
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/* redorder playlists by bitrate */
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/* reorder playlists by bitrate */
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if (self->lists) {
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gchar *top_variant_uri = NULL;
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gboolean iframe = FALSE;
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@ -670,7 +670,7 @@ gst_m3u8_client_update (GstM3U8Client * self, gchar * data)
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self->sequence =
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GST_M3U8_MEDIA_FILE (g_list_first (m3u8->files)->data)->sequence;
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self->sequence_position = 0;
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GST_DEBUG ("Setting first sequence at %d", self->sequence);
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GST_DEBUG ("Setting first sequence at %u", (guint) self->sequence);
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}
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ret = TRUE;
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@ -688,17 +688,26 @@ _find_current (GstM3U8MediaFile * file, GstM3U8Client * client)
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static gboolean
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_find_next (GstM3U8MediaFile * file, GstM3U8Client * client)
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{
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GST_DEBUG ("Found fragment %d", file->sequence);
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GST_DEBUG ("Found fragment %u", (guint) file->sequence);
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if (file->sequence >= client->sequence)
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return FALSE;
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return TRUE;
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}
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static gboolean
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_find_previous (GstM3U8MediaFile * file, GstM3U8Client * client)
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{
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GST_DEBUG ("Found fragment %u", (guint) file->sequence);
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if (file->sequence <= client->sequence)
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return FALSE;
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return TRUE;
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}
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gboolean
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gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
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gboolean * discontinuity, const gchar ** uri, GstClockTime * duration,
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GstClockTime * timestamp, gint64 * range_start, gint64 * range_end,
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const gchar ** key, const guint8 ** iv)
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const gchar ** key, const guint8 ** iv, gboolean forward)
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{
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GList *l;
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GstM3U8MediaFile *file;
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@ -707,9 +716,13 @@ gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
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g_return_val_if_fail (client->current != NULL, FALSE);
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GST_M3U8_CLIENT_LOCK (client);
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GST_DEBUG ("Looking for fragment %d", client->sequence);
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GST_DEBUG ("Looking for fragment %" G_GINT64_FORMAT, client->sequence);
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if (client->sequence < 0) {
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GST_M3U8_CLIENT_UNLOCK (client);
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return FALSE;
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}
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l = g_list_find_custom (client->current->files, client,
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(GCompareFunc) _find_next);
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(GCompareFunc) (forward ? _find_next : _find_previous));
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if (l == NULL) {
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GST_M3U8_CLIENT_UNLOCK (client);
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return FALSE;
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@ -717,7 +730,7 @@ gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
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file = GST_M3U8_MEDIA_FILE (l->data);
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GST_DEBUG ("Got fragment with sequence %u (client sequence %u)",
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file->sequence, client->sequence);
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(guint) file->sequence, (guint) client->sequence);
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if (timestamp)
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*timestamp = client->sequence_position;
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@ -742,7 +755,7 @@ gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
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}
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void
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gst_m3u8_client_advance_fragment (GstM3U8Client * client)
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gst_m3u8_client_advance_fragment (GstM3U8Client * client, gboolean forward)
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{
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GList *l;
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GstM3U8MediaFile *file;
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@ -751,9 +764,9 @@ gst_m3u8_client_advance_fragment (GstM3U8Client * client)
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g_return_if_fail (client->current != NULL);
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GST_M3U8_CLIENT_LOCK (client);
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GST_DEBUG ("Looking for fragment %d", client->sequence);
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GST_DEBUG ("Looking for fragment %" G_GINT64_FORMAT, client->sequence);
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l = g_list_find_custom (client->current->files, client,
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(GCompareFunc) _find_next);
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(GCompareFunc) _find_current);
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if (l == NULL) {
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GST_ERROR ("Could not find current fragment");
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GST_M3U8_CLIENT_UNLOCK (client);
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@ -761,9 +774,17 @@ gst_m3u8_client_advance_fragment (GstM3U8Client * client)
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}
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file = GST_M3U8_MEDIA_FILE (l->data);
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GST_DEBUG ("Advancing from sequence %u", file->sequence);
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GST_DEBUG ("Advancing from sequence %u", (guint) file->sequence);
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if (forward) {
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client->sequence = file->sequence + 1;
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client->sequence_position += file->duration;
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} else {
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client->sequence = file->sequence - 1;
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if (client->sequence_position > file->duration)
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client->sequence_position -= file->duration;
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else
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client->sequence_position = 0;
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}
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GST_M3U8_CLIENT_UNLOCK (client);
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}
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@ -59,7 +59,7 @@ struct _GstM3U8
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GList *iframe_lists; /* I-frame lists from the main playlist */
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GList *current_variant; /* Current variant playlist used */
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GstM3U8 *parent; /* main playlist (if any) */
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guint mediasequence; /* EXT-X-MEDIA-SEQUENCE & increased with new media file */
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gint64 mediasequence; /* EXT-X-MEDIA-SEQUENCE & increased with new media file */
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};
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struct _GstM3U8MediaFile
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@ -67,7 +67,7 @@ struct _GstM3U8MediaFile
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gchar *title;
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GstClockTime duration;
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gchar *uri;
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guint sequence; /* the sequence nb of this file */
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gint64 sequence; /* the sequence nb of this file */
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gboolean discont; /* this file marks a discontinuity */
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gchar *key;
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guint8 iv[16];
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@ -79,7 +79,7 @@ struct _GstM3U8Client
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GstM3U8 *main; /* main playlist */
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GstM3U8 *current;
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guint update_failed_count;
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gint sequence; /* the next sequence for this client */
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gint64 sequence; /* the next sequence for this client */
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GstClockTime sequence_position; /* position of this sequence */
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GMutex lock;
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};
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@ -92,8 +92,8 @@ void gst_m3u8_client_set_current (GstM3U8Client * client, GstM3U8 * m3u8);
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gboolean gst_m3u8_client_get_next_fragment (GstM3U8Client * client,
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gboolean * discontinuity, const gchar ** uri, GstClockTime * duration,
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GstClockTime * timestamp, gint64 * range_start, gint64 * range_end,
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const gchar ** key, const guint8 ** iv);
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void gst_m3u8_client_advance_fragment (GstM3U8Client * client);
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const gchar ** key, const guint8 ** iv, gboolean forward);
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void gst_m3u8_client_advance_fragment (GstM3U8Client * client, gboolean forward);
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GstClockTime gst_m3u8_client_get_duration (GstM3U8Client * client);
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GstClockTime gst_m3u8_client_get_target_duration (GstM3U8Client * client);
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const gchar *gst_m3u8_client_get_uri(GstM3U8Client * client);
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