1 /* GStreamer plugin for forward error correction 2 * Copyright (C) 2017 Pexip 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 * 18 * Author: Mikhail Fludkov <misha@pexip.com> 19 */ 20 21 #ifndef __GST_FEC_H__ 22 #define __GST_FEC_H__ 23 24 #include <gst/gst.h> 25 26 G_BEGIN_DECLS 27 28 #define GST_TYPE_RTP_ULPFEC_ENC \ 29 (gst_rtp_ulpfec_enc_get_type()) 30 #define GST_RTP_ULPFEC_ENC(obj) \ 31 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_ULPFEC_ENC,GstRtpUlpFecEnc)) 32 #define GST_RTP_ULPFEC_ENC_CLASS(klass) \ 33 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_ULPFEC_ENC,GstRtpUlpFecEncClass)) 34 #define GST_IS_RTP_ULPFEC_ENC(obj) \ 35 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_ULPFEC_ENC)) 36 #define GST_IS_RTP_ULPFEC_ENC_CLASS(klass) \ 37 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_ULPFEC_ENC)) 38 39 typedef struct _GstRtpUlpFecEnc GstRtpUlpFecEnc; 40 typedef struct _GstRtpUlpFecEncClass GstRtpUlpFecEncClass; 41 42 struct _GstRtpUlpFecEncClass { 43 GstElementClass parent_class; 44 }; 45 46 struct _GstRtpUlpFecEnc { 47 GstElement parent; 48 GstPad *srcpad; 49 GstPad *sinkpad; 50 guint8 twcc_ext_id; 51 52 GHashTable *ssrc_to_ctx; 53 54 /* properties */ 55 guint pt; 56 guint32 ssrc; 57 guint percentage; 58 guint percentage_important; 59 gboolean multipacket; 60 guint num_packets_protected; 61 }; 62 63 typedef struct { 64 guint ssrc; 65 66 GstElement *parent; 67 GstPad *srcpad; 68 69 /* settings */ 70 guint pt; 71 guint percentage; 72 guint percentage_important; 73 gboolean multipacket; 74 gboolean mux_seq; 75 76 guint num_packets_protected; 77 guint16 seqnum; 78 guint seqnum_offset; 79 guint num_packets_received; 80 guint num_packets_fec; 81 guint fec_nth; 82 GQueue packets_buf; 83 84 gdouble budget; 85 gdouble budget_inc; 86 gdouble budget_important; 87 gdouble budget_inc_important; 88 89 GArray *info_arr; 90 GArray *scratch_buf; 91 92 guint fec_packets; 93 guint fec_packet_idx; 94 } GstRtpUlpFecEncStreamCtx; 95 96 GType gst_rtp_ulpfec_enc_get_type (void); 97 98 G_END_DECLS 99 100 #endif /* __GST_FEC_H__ */ 101