FreeCalypso > hg > themwi-rtp-lib

annotate src/twjit_out.c @ 25:e67b3bb87d1b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
RTP Tx: network byte order
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 Jul 2024 17:41:19 +0000
parents 323957bebd53
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
5
1bb26347e253 twjit: split into separate base/in/out modules
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
2 * Themyscira Wireless jitter buffer implementation:
1bb26347e253 twjit: split into separate base/in/out modules
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
3 * output to the fixed timing system.
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <stdint.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <stdbool.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <string.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <osmocom/core/linuxlist.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <osmocom/core/msgb.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 #include <osmocom/core/utils.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 #include <themwi/rtp/twjit.h>
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 static bool starting_sb_is_ready(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->write_sb];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 if (sb->depth < sb->conf.bd_start)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 return false;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 if (sb->delta_ms < sb->conf.start_min_delta)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 return false;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 return true;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 static bool read_sb_is_empty(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->read_sb];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 return sb->depth == 0;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 static struct msgb *pull_from_read_sb(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->read_sb];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 struct msgb *msg;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 OSMO_ASSERT(!llist_empty(&sb->queue));
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 OSMO_ASSERT(sb->depth > 0);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 msg = llist_entry(sb->queue.next, struct msgb, list);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 if (msg->cb[0] == sb->head_ts) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 llist_del(&msg->list);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 twjit->stats.delivered_pkt++;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 } else {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 msg = NULL;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 twjit->stats.output_gaps++;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 sb->head_ts += twjit->ts_quantum;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 sb->depth--;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 return msg;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 static void read_sb_thinning(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->read_sb];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 struct msgb *msg;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 if (sb->drop_int_count) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 sb->drop_int_count--;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 if (sb->depth <= sb->conf.bd_hiwat)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 twjit->stats.thinning_drops++;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 msg = pull_from_read_sb(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 if (msg)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68 msgb_free(msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 sb->drop_int_count = sb->conf.thinning_int - 2;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 static void toss_read_queue(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->read_sb];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 msgb_queue_free(&sb->queue);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 sb->depth = 0;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 struct msgb *twrtp_jibuf_output(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 switch (twjit->state) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 case TWJIT_STATE_EMPTY:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 return NULL;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 case TWJIT_STATE_HUNT:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 if (!starting_sb_is_ready(twjit))
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 return NULL;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 twjit->state = TWJIT_STATE_FLOWING;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 twjit->read_sb = twjit->write_sb;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 return pull_from_read_sb(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 case TWJIT_STATE_FLOWING:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92 if (read_sb_is_empty(twjit)) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 twjit->state = TWJIT_STATE_EMPTY;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94 return NULL;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96 read_sb_thinning(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 return pull_from_read_sb(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 case TWJIT_STATE_HANDOVER:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 if (starting_sb_is_ready(twjit)) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 toss_read_queue(twjit);
11
4f82b9c07ddb twjit: update to stats
Mychaela Falconia <falcon@freecalypso.org>
parents: 5
diff changeset
101 twjit->stats.handovers_out++;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 twjit->state = TWJIT_STATE_FLOWING;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 twjit->read_sb = twjit->write_sb;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 return pull_from_read_sb(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 if (read_sb_is_empty(twjit)) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 twjit->state = TWJIT_STATE_HUNT;
12
323957bebd53 twjit: smarter counting of underruns
Mychaela Falconia <falcon@freecalypso.org>
parents: 11
diff changeset
108 twjit->stats.ho_underruns++;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 return NULL;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 read_sb_thinning(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 return pull_from_read_sb(twjit);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 default:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 OSMO_ASSERT(0);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 }