static gboolean gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update) { GstFragment *download; GstBuffer *buf; gchar *playlist; gboolean updated = FALSE; const gchar *uri = gst_m3u8_client_get_current_uri (demux->client); download = gst_uri_downloader_fetch_uri (demux->downloader, uri); if (download == NULL) return FALSE; buf = gst_fragment_get_buffer (download); playlist = gst_hls_src_buf_to_utf8_playlist (buf); g_object_unref (download); if (playlist == NULL) { GST_WARNING_OBJECT (demux, "Couldn't not validate playlist encoding"); return FALSE; } updated = gst_m3u8_client_update (demux->client, playlist); /* If it's a live source, do not let the sequence number go beyond * three fragments before the end of the list */ if (updated && update == FALSE && demux->client->current && gst_m3u8_client_is_live (demux->client)) { guint last_sequence; GST_M3U8_CLIENT_LOCK (demux->client); last_sequence = GST_M3U8_MEDIA_FILE (g_list_last (demux->client->current-> files)->data)->sequence; if (demux->client->sequence >= last_sequence - 3) { GST_DEBUG_OBJECT (demux, "Sequence is beyond playlist. Moving back to %d", last_sequence - 3); demux->need_segment = TRUE; demux->client->sequence = last_sequence - 3; } GST_M3U8_CLIENT_UNLOCK (demux->client); } return updated; }
static gboolean gst_hls_demux_change_playlist (GstHLSDemux * demux, gboolean is_fast) { GList *list; GstStructure *s; gint new_bandwidth; GST_M3U8_CLIENT_LOCK (demux->client); if (is_fast) list = g_list_next (demux->client->main->current_variant); else list = g_list_previous (demux->client->main->current_variant); /* Don't do anything else if the playlist is the same */ if (!list || list->data == demux->client->current) { GST_M3U8_CLIENT_UNLOCK (demux->client); return TRUE; } demux->client->main->current_variant = list; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_m3u8_client_set_current (demux->client, list->data); GST_M3U8_CLIENT_LOCK (demux->client); new_bandwidth = demux->client->current->bandwidth; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_hls_demux_update_playlist (demux); GST_INFO_OBJECT (demux, "Client is %s, switching to bitrate %d", is_fast ? "fast" : "slow", new_bandwidth); s = gst_structure_new ("playlist", "uri", G_TYPE_STRING, gst_m3u8_client_get_current_uri (demux->client), "bitrate", G_TYPE_INT, new_bandwidth, NULL); gst_element_post_message (GST_ELEMENT_CAST (demux), gst_message_new_element (GST_OBJECT_CAST (demux), s)); /* Force typefinding since we might have changed media type */ demux->do_typefind = TRUE; return TRUE; }
static gboolean gst_hls_demux_update_playlist (GstHLSDemux * demux) { const guint8 *data; gchar *playlist; guint avail; const gchar *uri = gst_m3u8_client_get_current_uri (demux->client); GST_INFO_OBJECT (demux, "Updating the playlist %s", uri); if (!gst_hls_demux_fetch_location (demux, uri)) return FALSE; avail = gst_adapter_available (demux->download); data = gst_adapter_peek (demux->download, avail); playlist = gst_hls_src_buf_to_utf8_playlist ((gchar *) data, avail); gst_adapter_clear (demux->download); if (playlist == NULL) { GST_WARNING_OBJECT (demux, "Couldn't not validate playlist encoding"); return FALSE; } gst_m3u8_client_update (demux->client, playlist); return TRUE; }
static gboolean gst_hls_demux_update_playlist (GstHLSDemux * demux, gboolean update, GError ** err) { GstAdaptiveDemux *adaptive_demux = GST_ADAPTIVE_DEMUX (demux); GstFragment *download; GstBuffer *buf; gchar *playlist; gboolean main_checked = FALSE, updated = FALSE; gchar *uri, *main_uri; retry: uri = gst_m3u8_client_get_current_uri (demux->client); main_uri = gst_m3u8_client_get_uri (demux->client); download = gst_uri_downloader_fetch_uri (adaptive_demux->downloader, uri, main_uri, TRUE, TRUE, TRUE, err); g_free (main_uri); if (download == NULL) { gchar *base_uri; if (!update || main_checked || !gst_m3u8_client_has_variant_playlist (demux->client)) { g_free (uri); return FALSE; } g_clear_error (err); main_uri = gst_m3u8_client_get_uri (demux->client); GST_INFO_OBJECT (demux, "Updating playlist %s failed, attempt to refresh variant playlist %s", uri, main_uri); download = gst_uri_downloader_fetch_uri (adaptive_demux->downloader, main_uri, NULL, TRUE, TRUE, TRUE, err); g_free (main_uri); if (download == NULL) { g_free (uri); return FALSE; } buf = gst_fragment_get_buffer (download); playlist = gst_hls_src_buf_to_utf8_playlist (buf); gst_buffer_unref (buf); if (playlist == NULL) { GST_WARNING_OBJECT (demux, "Failed to validate variant playlist encoding"); g_free (uri); g_object_unref (download); g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_WRONG_TYPE, "Couldn't validate playlist encoding"); return FALSE; } g_free (uri); if (download->redirect_permanent && download->redirect_uri) { uri = download->redirect_uri; base_uri = NULL; } else { uri = download->uri; base_uri = download->redirect_uri; } if (!gst_m3u8_client_update_variant_playlist (demux->client, playlist, uri, base_uri)) { GST_WARNING_OBJECT (demux, "Failed to update the variant playlist"); g_object_unref (download); g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_FAILED, "Couldn't update playlist"); return FALSE; } g_object_unref (download); main_checked = TRUE; goto retry; } g_free (uri); /* Set the base URI of the playlist to the redirect target if any */ GST_M3U8_CLIENT_LOCK (demux->client); g_free (demux->client->current->uri); g_free (demux->client->current->base_uri); if (download->redirect_permanent && download->redirect_uri) { demux->client->current->uri = g_strdup (download->redirect_uri); demux->client->current->base_uri = NULL; } else { demux->client->current->uri = g_strdup (download->uri); demux->client->current->base_uri = g_strdup (download->redirect_uri); } GST_M3U8_CLIENT_UNLOCK (demux->client); buf = gst_fragment_get_buffer (download); playlist = gst_hls_src_buf_to_utf8_playlist (buf); gst_buffer_unref (buf); g_object_unref (download); if (playlist == NULL) { GST_WARNING_OBJECT (demux, "Couldn't validate playlist encoding"); g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_WRONG_TYPE, "Couldn't validate playlist encoding"); return FALSE; } updated = gst_m3u8_client_update (demux->client, playlist); if (!updated) { GST_WARNING_OBJECT (demux, "Couldn't update playlist"); g_set_error (err, GST_STREAM_ERROR, GST_STREAM_ERROR_FAILED, "Couldn't update playlist"); return FALSE; } /* If it's a live source, do not let the sequence number go beyond * three fragments before the end of the list */ if (update == FALSE && demux->client->current && gst_m3u8_client_is_live (demux->client)) { gint64 last_sequence, first_sequence; GST_M3U8_CLIENT_LOCK (demux->client); last_sequence = GST_M3U8_MEDIA_FILE (g_list_last (demux->client->current-> files)->data)->sequence; first_sequence = GST_M3U8_MEDIA_FILE (demux->client->current->files->data)->sequence; GST_DEBUG_OBJECT (demux, "sequence:%" G_GINT64_FORMAT " , first_sequence:%" G_GINT64_FORMAT " , last_sequence:%" G_GINT64_FORMAT, demux->client->sequence, first_sequence, last_sequence); if (demux->client->sequence >= last_sequence - 3) { //demux->need_segment = TRUE; /* Make sure we never go below the minimum sequence number */ demux->client->sequence = MAX (first_sequence, last_sequence - 3); GST_DEBUG_OBJECT (demux, "Sequence is beyond playlist. Moving back to %" G_GINT64_FORMAT, demux->client->sequence); } GST_M3U8_CLIENT_UNLOCK (demux->client); } else if (demux->client->current && !gst_m3u8_client_is_live (demux->client)) { GstClockTime current_pos, target_pos; guint sequence = 0; GList *walk; /* Sequence numbers are not guaranteed to be the same in different * playlists, so get the correct fragment here based on the current * position */ GST_M3U8_CLIENT_LOCK (demux->client); /* Valid because hlsdemux only has a single output */ if (GST_ADAPTIVE_DEMUX_CAST (demux)->streams) { GstAdaptiveDemuxStream *stream = GST_ADAPTIVE_DEMUX_CAST (demux)->streams->data; target_pos = stream->segment.position; } else { target_pos = 0; } if (GST_CLOCK_TIME_IS_VALID (demux->client->sequence_position)) { target_pos = MAX (target_pos, demux->client->sequence_position); } GST_LOG_OBJECT (demux, "Looking for sequence position %" GST_TIME_FORMAT " in updated playlist", GST_TIME_ARGS (target_pos)); current_pos = 0; for (walk = demux->client->current->files; walk; walk = walk->next) { GstM3U8MediaFile *file = walk->data; sequence = file->sequence; if (current_pos <= target_pos && target_pos < current_pos + file->duration) { break; } current_pos += file->duration; } /* End of playlist */ if (!walk) sequence++; demux->client->sequence = sequence; demux->client->sequence_position = current_pos; GST_M3U8_CLIENT_UNLOCK (demux->client); } return updated; }
static gboolean gst_hls_demux_change_playlist (GstHLSDemux * demux, guint max_bitrate, gboolean * changed) { GList *previous_variant, *current_variant; gint old_bandwidth, new_bandwidth; GstAdaptiveDemux *adaptive_demux = GST_ADAPTIVE_DEMUX_CAST (demux); GstAdaptiveDemuxStream *stream; g_return_val_if_fail (adaptive_demux->streams != NULL, FALSE); stream = adaptive_demux->streams->data; previous_variant = demux->client->main->current_variant; current_variant = gst_m3u8_client_get_playlist_for_bitrate (demux->client, max_bitrate); GST_M3U8_CLIENT_LOCK (demux->client); retry_failover_protection: old_bandwidth = GST_M3U8 (previous_variant->data)->bandwidth; new_bandwidth = GST_M3U8 (current_variant->data)->bandwidth; /* Don't do anything else if the playlist is the same */ if (new_bandwidth == old_bandwidth) { GST_M3U8_CLIENT_UNLOCK (demux->client); return TRUE; } demux->client->main->current_variant = current_variant; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_m3u8_client_set_current (demux->client, current_variant->data); GST_INFO_OBJECT (demux, "Client was on %dbps, max allowed is %dbps, switching" " to bitrate %dbps", old_bandwidth, max_bitrate, new_bandwidth); if (gst_hls_demux_update_playlist (demux, TRUE, NULL)) { gchar *uri; gchar *main_uri; uri = gst_m3u8_client_get_current_uri (demux->client); main_uri = gst_m3u8_client_get_uri (demux->client); gst_element_post_message (GST_ELEMENT_CAST (demux), gst_message_new_element (GST_OBJECT_CAST (demux), gst_structure_new (GST_ADAPTIVE_DEMUX_STATISTICS_MESSAGE_NAME, "manifest-uri", G_TYPE_STRING, main_uri, "uri", G_TYPE_STRING, uri, "bitrate", G_TYPE_INT, new_bandwidth, NULL))); g_free (uri); g_free (main_uri); if (changed) *changed = TRUE; stream->discont = TRUE; } else { GList *failover = NULL; GST_INFO_OBJECT (demux, "Unable to update playlist. Switching back"); GST_M3U8_CLIENT_LOCK (demux->client); failover = g_list_previous (current_variant); if (failover && new_bandwidth == GST_M3U8 (failover->data)->bandwidth) { current_variant = failover; goto retry_failover_protection; } demux->client->main->current_variant = previous_variant; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_m3u8_client_set_current (demux->client, previous_variant->data); /* Try a lower bitrate (or stop if we just tried the lowest) */ if (GST_M3U8 (previous_variant->data)->iframe && new_bandwidth == GST_M3U8 (g_list_first (demux->client->main->iframe_lists)->data)-> bandwidth) return FALSE; else if (!GST_M3U8 (previous_variant->data)->iframe && new_bandwidth == GST_M3U8 (g_list_first (demux->client->main->lists)->data)->bandwidth) return FALSE; else return gst_hls_demux_change_playlist (demux, new_bandwidth - 1, changed); } /* Force typefinding since we might have changed media type */ demux->do_typefind = TRUE; return TRUE; }
static gboolean gst_hls_demux_change_playlist (GstHLSDemux * demux, guint max_bitrate) { GList *previous_variant, *current_variant; gint old_bandwidth, new_bandwidth; /* If user specifies a connection speed never use a playlist with a bandwidth * superior than it */ if (demux->connection_speed != 0 && max_bitrate > demux->connection_speed) max_bitrate = demux->connection_speed; previous_variant = demux->client->main->current_variant; current_variant = gst_m3u8_client_get_playlist_for_bitrate (demux->client, max_bitrate); retry_failover_protection: old_bandwidth = GST_M3U8 (previous_variant->data)->bandwidth; new_bandwidth = GST_M3U8 (current_variant->data)->bandwidth; /* Don't do anything else if the playlist is the same */ if (new_bandwidth == old_bandwidth) { return TRUE; } demux->client->main->current_variant = current_variant; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_m3u8_client_set_current (demux->client, current_variant->data); GST_INFO_OBJECT (demux, "Client was on %dbps, max allowed is %dbps, switching" " to bitrate %dbps", old_bandwidth, max_bitrate, new_bandwidth); if (gst_hls_demux_update_playlist (demux, FALSE)) { GstStructure *s; s = gst_structure_new ("playlist", "uri", G_TYPE_STRING, gst_m3u8_client_get_current_uri (demux->client), "bitrate", G_TYPE_INT, new_bandwidth, NULL); gst_element_post_message (GST_ELEMENT_CAST (demux), gst_message_new_element (GST_OBJECT_CAST (demux), s)); } else { GList *failover = NULL; GST_INFO_OBJECT (demux, "Unable to update playlist. Switching back"); GST_M3U8_CLIENT_LOCK (demux->client); failover = g_list_previous (current_variant); if (failover && new_bandwidth == GST_M3U8 (failover->data)->bandwidth) { current_variant = failover; goto retry_failover_protection; } demux->client->main->current_variant = previous_variant; GST_M3U8_CLIENT_UNLOCK (demux->client); gst_m3u8_client_set_current (demux->client, previous_variant->data); /* Try a lower bitrate (or stop if we just tried the lowest) */ if (new_bandwidth == GST_M3U8 (g_list_first (demux->client->main->lists)->data)->bandwidth) return FALSE; else return gst_hls_demux_change_playlist (demux, new_bandwidth - 1); } /* Force typefinding since we might have changed media type */ demux->do_typefind = TRUE; return TRUE; }