FreeCalypso > hg > themwi-rtp-lib

annotate src/twjit_in.c @ 10:e60df79cbe9f

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twjit: eliminate dependency on libosmo-netif
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 06 Jul 2024 00:29:24 +0000
parents 117fa99ff871
children 4f82b9c07ddb
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1 /*
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2 * Themyscira Wireless jitter buffer implementation: RTP input processing.
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3 */
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4
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5 #include <stdint.h>
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6 #include <stdbool.h>
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7 #include <string.h>
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8 #include <arpa/inet.h> /* for network byte order functions */
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10 #include <osmocom/core/linuxlist.h>
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11 #include <osmocom/core/msgb.h>
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12 #include <osmocom/core/timer.h>
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13 #include <osmocom/core/utils.h>
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14
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15 #include <themwi/rtp/twjit.h>
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16
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17 struct rtp_basic_hdr {
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18 uint8_t v_p_x_cc;
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19 uint8_t m_pt;
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20 uint16_t seq;
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21 uint32_t tstamp;
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22 uint32_t ssrc;
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23 };
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25 /* raw analytics on the Rx packet stream */
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26
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27 static void analytics_init(struct twrtp_jibuf_inst *twjit, uint16_t rx_seq)
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28 {
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29 struct twrtp_jibuf_rr_info *rri = &twjit->rr_info;
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31 rri->rx_packets = 1;
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32 rri->base_seq = rx_seq;
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33 rri->max_seq_ext = rx_seq;
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34 rri->expected_pkt = 1;
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35 rri->jitter_accum = 0;
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36 }
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37
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38 static void analytics_cont(struct twrtp_jibuf_inst *twjit, uint16_t rx_seq,
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39 uint32_t rx_ts, struct timespec *now)
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40 {
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41 struct twrtp_jibuf_rr_info *rri = &twjit->rr_info;
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42 uint16_t seq_ext_lo = rri->max_seq_ext;
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43 uint16_t seq_ext_hi = rri->max_seq_ext >> 16;
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44 int16_t seq_delta = (int16_t)(rx_seq - twjit->last_seq);
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45 int16_t seq_delta2 = (int16_t)(rx_seq - seq_ext_lo);
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46 int32_t ts_delta = (int32_t)(rx_ts - twjit->last_ts);
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47 struct timespec time_delta;
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48 uint32_t time_delta_tsu;
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49 int32_t jitter_new, ts_delta_clamp;
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50
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51 /* analytics for our own stats */
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52 if (seq_delta < 0)
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53 twjit->stats.seq_backwards++;
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54 else if (seq_delta == 0)
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55 twjit->stats.seq_repeats++;
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56 else if (seq_delta == 1) {
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57 if (ts_delta != twjit->ts_quantum) {
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58 if (ts_delta > 0 && (ts_delta % twjit->ts_quantum) == 0)
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59 twjit->stats.intentional_gaps++;
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60 else
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61 twjit->stats.ts_resets++;
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62 }
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63 } else
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64 twjit->stats.seq_skips++;
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65
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66 /* analytics for RTCP RR: packet counts */
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67 rri->rx_packets++;
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68 if (seq_delta2 > 0) {
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69 if (rx_seq < seq_ext_lo)
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70 seq_ext_hi++;
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71 seq_ext_lo = rx_seq;
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72 rri->max_seq_ext = ((uint32_t) seq_ext_hi << 16) | seq_ext_lo;
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73 rri->expected_pkt = rri->max_seq_ext - rri->base_seq + 1;
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74 }
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75
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76 /* time-of-arrival analytics */
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77 time_delta.tv_sec = now->tv_sec - twjit->last_arrival.tv_sec;
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78 time_delta.tv_nsec = now->tv_nsec - twjit->last_arrival.tv_nsec;
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79 if (time_delta.tv_nsec < 0) {
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80 time_delta.tv_sec--;
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81 time_delta.tv_nsec += 1000000000;
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82 }
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83 /* to avoid overflows in downstream math, clamp to 1 hour */
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84 if (time_delta.tv_sec >= 3600) {
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85 time_delta.tv_sec = 3600;
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86 time_delta.tv_nsec = 0;
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87 }
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88 /* convert to RTP timestamp units */
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89 time_delta_tsu = time_delta.tv_sec * twjit->ts_units_per_sec +
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90 time_delta.tv_nsec / twjit->ns_to_ts_units;
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91 twjit->last_arrival_delta = time_delta_tsu;
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92 /* jitter calculation for RTCP RR */
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93 ts_delta_clamp = twjit->ts_units_per_sec * 3600;
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94 if (ts_delta > ts_delta_clamp)
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95 ts_delta = ts_delta_clamp;
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96 else if (ts_delta < -ts_delta_clamp)
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97 ts_delta = -ts_delta_clamp;
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98 jitter_new = time_delta_tsu - ts_delta;
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99 if (jitter_new < 0)
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100 jitter_new = -jitter_new;
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101 rri->jitter_accum += jitter_new - ((rri->jitter_accum + 8) >> 4);
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102 }
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103
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104 /* actual twjit input logic */
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105
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106 static void
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107 init_subbuf_first_packet(struct twrtp_jibuf_inst *twjit, struct msgb *msg,
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108 uint32_t rx_ssrc, uint32_t rx_ts)
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109 {
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110 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->write_sb];
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111
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112 OSMO_ASSERT(llist_empty(&sb->queue));
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113 OSMO_ASSERT(sb->depth == 0);
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114 /* all good, proceed */
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115 sb->ssrc = rx_ssrc;
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116 sb->head_ts = rx_ts;
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117 msgb_enqueue(&sb->queue, msg);
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118 sb->depth = 1;
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119 memcpy(&sb->conf, twjit->ext_config, sizeof(struct twrtp_jibuf_config));
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120 sb->drop_int_count = 0;
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121 }
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122
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123 enum input_decision {
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124 INPUT_CONTINUE,
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125 INPUT_TOO_OLD,
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126 INPUT_RESET,
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127 };
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128
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129 static enum input_decision
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130 check_input_for_subbuf(struct twrtp_jibuf_inst *twjit, bool starting,
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131 uint32_t rx_ssrc, uint32_t rx_ts)
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132 {
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133 struct twrtp_jibuf_sub *sb = &twjit->sb[twjit->write_sb];
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134 int32_t ts_delta;
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135
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 if (rx_ssrc != sb->ssrc)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 return INPUT_RESET;
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
138 sb->delta_ms = twjit->last_arrival_delta / twjit->ts_units_per_ms;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 ts_delta = (int32_t)(rx_ts - sb->head_ts);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 if (ts_delta < 0)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 return INPUT_TOO_OLD;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 if (ts_delta % twjit->ts_quantum)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 return INPUT_RESET;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 if (starting) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 if (sb->conf.start_max_delta &&
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 sb->delta_ms > sb->conf.start_max_delta)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 return INPUT_RESET;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 } else {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 uint32_t fwd = ts_delta / twjit->ts_quantum;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150
8
95f6c8ce33b0 twjit: prep for rework of time delta handling
Mychaela Falconia <falcon@freecalypso.org>
parents: 5
diff changeset
151 if (fwd >= (uint32_t) sb->conf.max_future_sec *
95f6c8ce33b0 twjit: prep for rework of time delta handling
Mychaela Falconia <falcon@freecalypso.org>
parents: 5
diff changeset
152 twjit->quanta_per_sec)
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 return INPUT_RESET;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 return INPUT_CONTINUE;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 static void toss_write_queue(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 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
161
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 msgb_queue_free(&sb->queue);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 sb->depth = 0;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 static void insert_pkt_write_sb(struct twrtp_jibuf_inst *twjit,
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 struct msgb *new_msg, uint32_t rx_ts)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 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
170 uint32_t ts_delta = rx_ts - sb->head_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 uint32_t ins_depth = ts_delta / twjit->ts_quantum;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 struct msgb *old_msg;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 uint32_t old_ts_delta;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175 /* are we increasing total depth, and can we do simple tail append? */
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176 if (ins_depth >= sb->depth) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177 msgb_enqueue(&sb->queue, new_msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178 sb->depth = ins_depth + 1;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 /* nope - do it the hard way */
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 llist_for_each_entry(old_msg, &sb->queue, list) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 old_ts_delta = old_msg->cb[0] - sb->head_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 if (old_ts_delta == ts_delta) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 /* two packets with the same timestamp! */
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 twjit->stats.duplicate_ts++;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187 msgb_free(new_msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190 if (old_ts_delta > ts_delta)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 break;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
193 llist_add_tail(&new_msg->list, &old_msg->list);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
194 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
195
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
196 static void trim_starting_sb(struct twrtp_jibuf_inst *twjit)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
197 {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
198 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
199 struct msgb *msg;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
200 uint32_t msg_ts, ts_adv, quantum_adv;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
201
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
202 while (sb->depth > sb->conf.bd_start) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
203 msg = msgb_dequeue(&sb->queue);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
204 OSMO_ASSERT(msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
205 msgb_free(msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
206 OSMO_ASSERT(!llist_empty(&sb->queue));
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
207 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
208 msg_ts = msg->cb[0];
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
209 ts_adv = msg_ts - sb->head_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
210 quantum_adv = ts_adv / twjit->ts_quantum;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
211 OSMO_ASSERT(sb->depth > quantum_adv);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
212 sb->head_ts = msg_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
213 sb->depth -= quantum_adv;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
214 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
215 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
216
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
217 void twrtp_jibuf_input(struct twrtp_jibuf_inst *twjit, struct msgb *msg)
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
218 {
10
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
219 struct rtp_basic_hdr *rtph;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
220 uint32_t rx_ssrc, rx_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
221 uint16_t rx_seq;
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
222 struct timespec now;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
223 enum input_decision id;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
224
10
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
225 if (msg->len < sizeof(struct rtp_basic_hdr)) {
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
226 inv_packet: twjit->stats.bad_packets++;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
227 msgb_free(msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
228 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
229 }
10
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
230 rtph = (struct rtp_basic_hdr *)msg->data;
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
231 if ((rtph->v_p_x_cc & 0xC0) != 0x80) /* version field */
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
232 goto inv_packet;
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
233 rx_ssrc = ntohl(rtph->ssrc);
10
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
234 rx_ts = ntohl(rtph->tstamp);
e60df79cbe9f twjit: eliminate dependency on libosmo-netif
Mychaela Falconia <falcon@freecalypso.org>
parents: 9
diff changeset
235 rx_seq = ntohs(rtph->seq);
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
236 osmo_clock_gettime(CLOCK_MONOTONIC, &now);
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
237 if (!twjit->got_first_packet) {
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
238 analytics_init(twjit, rx_seq);
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
239 twjit->got_first_packet = true;
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
240 } else if (rx_ssrc != twjit->last_ssrc) {
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
241 twjit->stats.ssrc_changes++;
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
242 analytics_init(twjit, rx_seq);
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
243 } else
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
244 analytics_cont(twjit, rx_seq, rx_ts, &now);
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
245 twjit->last_ssrc = rx_ssrc;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
246 twjit->last_seq = rx_seq;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
247 twjit->last_ts = rx_ts;
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
248 memcpy(&twjit->last_arrival, &now, sizeof(struct timespec));
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
249 msg->cb[0] = rx_ts;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
250
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
251 switch (twjit->state) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
252 case TWJIT_STATE_EMPTY:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
253 /* first packet into totally empty buffer */
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
254 twjit->state = TWJIT_STATE_HUNT;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
255 twjit->write_sb = 0;
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
256 init_subbuf_first_packet(twjit, msg, rx_ssrc, rx_ts);
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
257 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
258 case TWJIT_STATE_HUNT:
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
259 case TWJIT_STATE_HANDOVER:
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
260 id = check_input_for_subbuf(twjit, true, rx_ssrc, rx_ts);
3
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
261 if (id == INPUT_TOO_OLD) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
262 msgb_free(msg);
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
263 return;
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
264 }
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
265 if (id == INPUT_RESET) {
d10ea5dc61b3 twjit: initial import from previous work repository
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
266 toss_write_queue(twjit);
9
117fa99ff871 twjit: implement proper analytics
Mychaela Falconia <falcon@freecalypso.org>
parents: 8
diff changeset
267 init_subbuf_first_packet(twjit, msg, rx_ssrc, rx_ts);
3
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268 return;
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269 }
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270 insert_pkt_write_sb(twjit, msg, rx_ts);
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271 trim_starting_sb(twjit);
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272 return;
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273 case TWJIT_STATE_FLOWING:
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274 id = check_input_for_subbuf(twjit, false, rx_ssrc, rx_ts);
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275 if (id == INPUT_TOO_OLD) {
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276 twjit->stats.too_old++;
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277 msgb_free(msg);
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278 return;
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279 }
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280 if (id == INPUT_RESET) {
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281 twjit->state = TWJIT_STATE_HANDOVER;
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282 twjit->write_sb = !twjit->write_sb;
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283 init_subbuf_first_packet(twjit, msg, rx_ssrc, rx_ts);
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284 twjit->stats.handovers++;
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285 return;
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286 }
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287 insert_pkt_write_sb(twjit, msg, rx_ts);
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288 return;
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289 default:
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290 OSMO_ASSERT(0);
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291 }
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292 }