#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "asterisk.h"
#include "jitterbuf.h"
Include dependency graph for jitterbuf.c:
Go to the source code of this file.
Defines | |
| #define | jb_dbg() (dbgf ? dbgf(__VA_ARGS__) : (void)0) |
| #define | jb_dbg2() ((void)0) |
| #define | jb_err() (errf ? errf(__VA_ARGS__) : (void)0) |
| #define | JB_LONGMAX 2147483647L |
| #define | JB_LONGMIN (-JB_LONGMAX - 1L) |
| #define | jb_warn() (warnf ? warnf(__VA_ARGS__) : (void)0) |
Functions | |
| static int | _jb_get (jitterbuf *jb, jb_frame *frameout, long now, long interpl) |
| static jb_frame * | _queue_get (jitterbuf *jb, long ts, int all) |
| static void | decrement_losspct (jitterbuf *jb) |
| static void | history_calc_maxbuf (jitterbuf *jb) |
| static void | history_get (jitterbuf *jb) |
| static int | history_put (jitterbuf *jb, long ts, long now, long ms) |
| simple history manipulation | |
| static void | increment_losspct (jitterbuf *jb) |
| void | jb_destroy (jitterbuf *jb) |
| int | jb_get (jitterbuf *jb, jb_frame *frameout, long now, long interpl) |
| int | jb_getall (jitterbuf *jb, jb_frame *frameout) |
| int | jb_getinfo (jitterbuf *jb, jb_info *stats) |
| jitterbuf * | jb_new () |
| long | jb_next (jitterbuf *jb) |
| int | jb_put (jitterbuf *jb, void *data, int type, long ms, long ts, long now) |
| void | jb_reset (jitterbuf *jb) |
| int | jb_setconf (jitterbuf *jb, jb_conf *conf) |
| void | jb_setoutput (jb_output_function_t err, jb_output_function_t warn, jb_output_function_t dbg) |
| static jb_frame * | queue_get (jitterbuf *jb, long ts) |
| static jb_frame * | queue_getall (jitterbuf *jb) |
| static long | queue_last (jitterbuf *jb) |
| static long | queue_next (jitterbuf *jb) |
| static int | queue_put (jitterbuf *jb, void *data, int type, long ms, long ts) |
Variables | |
| static jb_output_function_t | dbgf |
| static jb_output_function_t | errf |
| static jb_output_function_t | warnf |
Definition in file jitterbuf.c.
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Definition at line 46 of file jitterbuf.c. Referenced by _jb_get(). |
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Definition at line 51 of file jitterbuf.c. Referenced by jb_destroy(), jb_new(), and jb_put(). |
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Definition at line 45 of file jitterbuf.c. Referenced by queue_put(). |
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define these here, just for ancient compiler systems Definition at line 41 of file jitterbuf.c. Referenced by history_calc_maxbuf(), and jb_next(). |
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Definition at line 42 of file jitterbuf.c. Referenced by history_calc_maxbuf(). |
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Definition at line 44 of file jitterbuf.c. Referenced by history_put(), and jb_get(). |
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Definition at line 539 of file jitterbuf.c. References decrement_losspct(), history_get(), increment_losspct(), JB_ADJUST_DELAY, jb_dbg, JB_DROP, JB_INTERP, JB_NOFRAME, JB_OK, JB_TARGET_EXTRA, JB_TYPE_SILENCE, JB_TYPE_VOICE, jb_frame::ms, queue_get(), queue_last(), queue_next(), jb_frame::ts, and jb_frame::type. Referenced by jb_get(). 00540 {
00541 jb_frame *frame;
00542 long diff;
00543 static int dbg_cnt = 0;
00544
00545 /*if ((now - jb_next(jb)) > 2 * jb->info.last_voice_ms) jb_warn("SCHED: %ld", (now - jb_next(jb))); */
00546 /* get jitter info */
00547 history_get(jb);
00548
00549 if (dbg_cnt && dbg_cnt % 50 == 0) {
00550 jb_dbg("\n");
00551 }
00552 dbg_cnt++;
00553
00554 /* target */
00555 jb->info.target = jb->info.jitter + jb->info.min + JB_TARGET_EXTRA;
00556
00557 /* if a hard clamp was requested, use it */
00558 if ((jb->info.conf.max_jitterbuf) && ((jb->info.target - jb->info.min) > jb->info.conf.max_jitterbuf)) {
00559 jb_dbg("clamping target from %d to %d\n", (jb->info.target - jb->info.min), jb->info.conf.max_jitterbuf);
00560 jb->info.target = jb->info.min + jb->info.conf.max_jitterbuf;
00561 }
00562
00563 diff = jb->info.target - jb->info.current;
00564
00565 /* jb_warn("diff = %d lms=%d last = %d now = %d\n", diff, */
00566 /* jb->info.last_voice_ms, jb->info.last_adjustment, now); */
00567
00568 /* let's work on non-silent case first */
00569 if (!jb->info.silence_begin_ts) {
00570 /* we want to grow */
00571 if ((diff > 0) &&
00572 /* we haven't grown in the delay length */
00573 (((jb->info.last_adjustment + JB_ADJUST_DELAY) < now) ||
00574 /* we need to grow more than the "length" we have left */
00575 (diff > queue_last(jb) - queue_next(jb)) ) ) {
00576 /* grow by interp frame length */
00577 jb->info.current += interpl;
00578 jb->info.next_voice_ts += interpl;
00579 jb->info.last_voice_ms = interpl;
00580 jb->info.last_adjustment = now;
00581 jb->info.cnt_contig_interp++;
00582 if (jb->info.conf.max_contig_interp && jb->info.cnt_contig_interp >= jb->info.conf.max_contig_interp) {
00583 jb->info.silence_begin_ts = jb->info.next_voice_ts - jb->info.current;
00584 }
00585 jb_dbg("G");
00586 return JB_INTERP;
00587 }
00588
00589 frame = queue_get(jb, jb->info.next_voice_ts - jb->info.current);
00590
00591 /* not a voice frame; just return it. */
00592 if (frame && frame->type != JB_TYPE_VOICE) {
00593 if (frame->type == JB_TYPE_SILENCE) {
00594 jb->info.silence_begin_ts = frame->ts;
00595 jb->info.cnt_contig_interp = 0;
00596 }
00597
00598 *frameout = *frame;
00599 jb->info.frames_out++;
00600 jb_dbg("o");
00601 return JB_OK;
00602 }
00603
00604
00605 /* voice frame is later than expected */
00606 if (frame && frame->ts + jb->info.current < jb->info.next_voice_ts) {
00607 if (frame->ts + jb->info.current > jb->info.next_voice_ts - jb->info.last_voice_ms) {
00608 /* either we interpolated past this frame in the last jb_get */
00609 /* or the frame is still in order, but came a little too quick */
00610 *frameout = *frame;
00611 /* reset expectation for next frame */
00612 jb->info.next_voice_ts = frame->ts + jb->info.current + frame->ms;
00613 jb->info.frames_out++;
00614 decrement_losspct(jb);
00615 jb->info.cnt_contig_interp = 0;
00616 jb_dbg("v");
00617 return JB_OK;
00618 } else {
00619 /* voice frame is late */
00620 *frameout = *frame;
00621 jb->info.frames_out++;
00622 decrement_losspct(jb);
00623 jb->info.frames_late++;
00624 jb->info.frames_lost--;
00625 jb_dbg("l");
00626 /*jb_warn("\nlate: wanted=%ld, this=%ld, next=%ld\n", jb->info.next_voice_ts - jb->info.current, frame->ts, queue_next(jb));
00627 jb_warninfo(jb); */
00628 return JB_DROP;
00629 }
00630 }
00631
00632 /* keep track of frame sizes, to allow for variable sized-frames */
00633 if (frame && frame->ms > 0) {
00634 jb->info.last_voice_ms = frame->ms;
00635 }
00636
00637 /* we want to shrink; shrink at 1 frame / 500ms */
00638 /* unless we don't have a frame, then shrink 1 frame */
00639 /* every 80ms (though perhaps we can shrink even faster */
00640 /* in this case) */
00641 if (diff < -JB_TARGET_EXTRA &&
00642 ((!frame && jb->info.last_adjustment + 80 < now) ||
00643 (jb->info.last_adjustment + 500 < now))) {
00644
00645 jb->info.last_adjustment = now;
00646 jb->info.cnt_contig_interp = 0;
00647
00648 if (frame) {
00649 *frameout = *frame;
00650 /* shrink by frame size we're throwing out */
00651 jb->info.current -= frame->ms;
00652 jb->info.frames_out++;
00653 decrement_losspct(jb);
00654 jb->info.frames_dropped++;
00655 jb_dbg("s");
00656 return JB_DROP;
00657 } else {
00658 /* shrink by last_voice_ms */
00659 jb->info.current -= jb->info.last_voice_ms;
00660 jb->info.frames_lost++;
00661 increment_losspct(jb);
00662 jb_dbg("S");
00663 return JB_NOFRAME;
00664 }
00665 }
00666
00667 /* lost frame */
00668 if (!frame) {
00669 /* this is a bit of a hack for now, but if we're close to
00670 * target, and we find a missing frame, it makes sense to
00671 * grow, because the frame might just be a bit late;
00672 * otherwise, we presently get into a pattern where we return
00673 * INTERP for the lost frame, then it shows up next, and we
00674 * throw it away because it's late */
00675 /* I've recently only been able to replicate this using
00676 * iaxclient talking to app_echo on asterisk. In this case,
00677 * my outgoing packets go through asterisk's (old)
00678 * jitterbuffer, and then might get an unusual increasing delay
00679 * there if it decides to grow?? */
00680 /* Update: that might have been a different bug, that has been fixed..
00681 * But, this still seemed like a good idea, except that it ended up making a single actual
00682 * lost frame get interpolated two or more times, when there was "room" to grow, so it might
00683 * be a bit of a bad idea overall */
00684 /*if (diff > -1 * jb->info.last_voice_ms) {
00685 jb->info.current += jb->info.last_voice_ms;
00686 jb->info.last_adjustment = now;
00687 jb_warn("g");
00688 return JB_INTERP;
00689 } */
00690 jb->info.frames_lost++;
00691 increment_losspct(jb);
00692 jb->info.next_voice_ts += interpl;
00693 jb->info.last_voice_ms = interpl;
00694 jb->info.cnt_contig_interp++;
00695 if (jb->info.conf.max_contig_interp && jb->info.cnt_contig_interp >= jb->info.conf.max_contig_interp) {
00696 jb->info.silence_begin_ts = jb->info.next_voice_ts - jb->info.current;
00697 }
00698 jb_dbg("L");
00699 return JB_INTERP;
00700 }
00701
00702 /* normal case; return the frame, increment stuff */
00703 *frameout = *frame;
00704 jb->info.next_voice_ts += frame->ms;
00705 jb->info.frames_out++;
00706 jb->info.cnt_contig_interp = 0;
00707 decrement_losspct(jb);
00708 jb_dbg("v");
00709 return JB_OK;
00710 } else {
00711 /* TODO: after we get the non-silent case down, we'll make the
00712 * silent case -- basically, we'll just grow and shrink faster
00713 * here, plus handle next_voice_ts a bit differently */
00714
00715 /* to disable silent special case altogether, just uncomment this: */
00716 /* jb->info.silence_begin_ts = 0; */
00717
00718 /* shrink interpl len every 10ms during silence */
00719 if (diff < -JB_TARGET_EXTRA &&
00720 jb->info.last_adjustment + 10 <= now) {
00721 jb->info.current -= interpl;
00722 jb->info.last_adjustment = now;
00723 }
00724
00725 frame = queue_get(jb, now - jb->info.current);
00726 if (!frame) {
00727 return JB_NOFRAME;
00728 } else if (frame->type != JB_TYPE_VOICE) {
00729 /* normal case; in silent mode, got a non-voice frame */
00730 *frameout = *frame;
00731 jb->info.frames_out++;
00732 return JB_OK;
00733 }
00734 if (frame->ts < jb->info.silence_begin_ts) {
00735 /* voice frame is late */
00736 *frameout = *frame;
00737 jb->info.frames_out++;
00738 decrement_losspct(jb);
00739 jb->info.frames_late++;
00740 jb->info.frames_lost--;
00741 jb_dbg("l");
00742 /*jb_warn("\nlate: wanted=%ld, this=%ld, next=%ld\n", jb->info.next_voice_ts - jb->info.current, frame->ts, queue_next(jb));
00743 jb_warninfo(jb); */
00744 return JB_DROP;
00745 } else {
00746 /* voice frame */
00747 /* try setting current to target right away here */
00748 jb->info.current = jb->info.target;
00749 jb->info.silence_begin_ts = 0;
00750 jb->info.next_voice_ts = frame->ts + jb->info.current + frame->ms;
00751 jb->info.last_voice_ms = frame->ms;
00752 jb->info.frames_out++;
00753 decrement_losspct(jb);
00754 *frameout = *frame;
00755 jb_dbg("V");
00756 return JB_OK;
00757 }
00758 }
00759 }
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Definition at line 407 of file jitterbuf.c. References jitterbuf::frames, jb_info::frames_cur, jitterbuf::free, jitterbuf::info, jb_frame::next, jb_frame::prev, and jb_frame::ts. Referenced by queue_get(), and queue_getall(). 00408 {
00409 jb_frame *frame;
00410 frame = jb->frames;
00411
00412 if (!frame)
00413 return NULL;
00414
00415 /*jb_warn("queue_get: ASK %ld FIRST %ld\n", ts, frame->ts); */
00416
00417 if (all || ts >= frame->ts) {
00418 /* remove this frame */
00419 frame->prev->next = frame->next;
00420 frame->next->prev = frame->prev;
00421
00422 if (frame->next == frame)
00423 jb->frames = NULL;
00424 else
00425 jb->frames = frame->next;
00426
00427
00428 /* insert onto "free" single-linked list */
00429 frame->next = jb->free;
00430 jb->free = frame;
00431
00432 jb->info.frames_cur--;
00433
00434 /* we return the frame pointer, even though it's on free list,
00435 * but caller must copy data */
00436 return frame;
00437 }
00438
00439 return NULL;
00440 }
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Definition at line 68 of file jitterbuf.c. References jitterbuf::info, and jb_info::losspct. Referenced by _jb_get().
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Definition at line 205 of file jitterbuf.c. References jitterbuf::hist_maxbuf, jitterbuf::hist_maxbuf_valid, jitterbuf::hist_minbuf, jitterbuf::hist_ptr, jitterbuf::history, JB_HISTORY_MAXBUF_SZ, JB_HISTORY_SZ, JB_LONGMAX, and JB_LONGMIN. Referenced by history_get(). 00206 {
00207 int i,j;
00208
00209 if (jb->hist_ptr == 0)
00210 return;
00211
00212
00213 /* initialize maxbuf/minbuf to the latest value */
00214 for (i=0;i<JB_HISTORY_MAXBUF_SZ;i++) {
00215 /*
00216 * jb->hist_maxbuf[i] = jb->history[(jb->hist_ptr-1) % JB_HISTORY_SZ];
00217 * jb->hist_minbuf[i] = jb->history[(jb->hist_ptr-1) % JB_HISTORY_SZ];
00218 */
00219 jb->hist_maxbuf[i] = JB_LONGMIN;
00220 jb->hist_minbuf[i] = JB_LONGMAX;
00221 }
00222
00223 /* use insertion sort to populate maxbuf */
00224 /* we want it to be the top "n" values, in order */
00225
00226 /* start at the beginning, or JB_HISTORY_SZ frames ago */
00227 i = (jb->hist_ptr > JB_HISTORY_SZ) ? (jb->hist_ptr - JB_HISTORY_SZ) : 0;
00228
00229 for (;i<jb->hist_ptr;i++) {
00230 long toins = jb->history[i % JB_HISTORY_SZ];
00231
00232 /* if the maxbuf should get this */
00233 if (toins > jb->hist_maxbuf[JB_HISTORY_MAXBUF_SZ-1]) {
00234
00235 /* insertion-sort it into the maxbuf */
00236 for (j=0;j<JB_HISTORY_MAXBUF_SZ;j++) {
00237 /* found where it fits */
00238 if (toins > jb->hist_maxbuf[j]) {
00239 /* move over */
00240 memmove(jb->hist_maxbuf+j+1,jb->hist_maxbuf+j, (JB_HISTORY_MAXBUF_SZ-(j+1)) * sizeof(long));
00241 /* insert */
00242 jb->hist_maxbuf[j] = toins;
00243
00244 break;
00245 }
00246 }
00247 }
00248
00249 /* if the minbuf should get this */
00250 if (toins < jb->hist_minbuf[JB_HISTORY_MAXBUF_SZ-1]) {
00251
00252 /* insertion-sort it into the maxbuf */
00253 for (j=0;j<JB_HISTORY_MAXBUF_SZ;j++) {
00254 /* found where it fits */
00255 if (toins < jb->hist_minbuf[j]) {
00256 /* move over */
00257 memmove(jb->hist_minbuf+j+1,jb->hist_minbuf+j, (JB_HISTORY_MAXBUF_SZ-(j+1)) * sizeof(long));
00258 /* insert */
00259 jb->hist_minbuf[j] = toins;
00260
00261 break;
00262 }
00263 }
00264 }
00265
00266 if (0) {
00267 int k;
00268 fprintf(stderr, "toins = %ld\n", toins);
00269 fprintf(stderr, "maxbuf =");
00270 for (k=0;k<JB_HISTORY_MAXBUF_SZ;k++)
00271 fprintf(stderr, "%ld ", jb->hist_maxbuf[k]);
00272 fprintf(stderr, "\nminbuf =");
00273 for (k=0;k<JB_HISTORY_MAXBUF_SZ;k++)
00274 fprintf(stderr, "%ld ", jb->hist_minbuf[k]);
00275 fprintf(stderr, "\n");
00276 }
00277 }
00278
00279 jb->hist_maxbuf_valid = 1;
00280 }
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Definition at line 282 of file jitterbuf.c. References jitterbuf::hist_maxbuf, jitterbuf::hist_maxbuf_valid, jitterbuf::hist_minbuf, jitterbuf::hist_ptr, history_calc_maxbuf(), jitterbuf::info, JB_HISTORY_DROPPCT, JB_HISTORY_MAXBUF_SZ, JB_HISTORY_SZ, jb_info::jitter, and jb_info::min. Referenced by _jb_get(), jb_getinfo(), and jb_next(). 00283 {
00284 long max, min, jitter;
00285 int index;
00286 int count;
00287
00288 if (!jb->hist_maxbuf_valid)
00289 history_calc_maxbuf(jb);
00290
00291 /* count is how many items in history we're examining */
00292 count = (jb->hist_ptr < JB_HISTORY_SZ) ? jb->hist_ptr : JB_HISTORY_SZ;
00293
00294 /* index is the "n"ths highest/lowest that we'll look for */
00295 index = count * JB_HISTORY_DROPPCT / 100;
00296
00297 /* sanity checks for index */
00298 if (index > (JB_HISTORY_MAXBUF_SZ - 1))
00299 index = JB_HISTORY_MAXBUF_SZ - 1;
00300
00301
00302 if (index < 0) {
00303 jb->info.min = 0;
00304 jb->info.jitter = 0;
00305 return;
00306 }
00307
00308 max = jb->hist_maxbuf[index];
00309 min = jb->hist_minbuf[index];
00310
00311 jitter = max - min;
00312
00313 /* these debug stmts compare the difference between looking at the absolute jitter, and the
00314 * values we get by throwing away the outliers */
00315 /*
00316 fprintf(stderr, "[%d] min=%d, max=%d, jitter=%d\n", index, min, max, jitter);
00317 fprintf(stderr, "[%d] min=%d, max=%d, jitter=%d\n", 0, jb->hist_minbuf[0], jb->hist_maxbuf[0], jb->hist_maxbuf[0]-jb->hist_minbuf[0]);
00318 */
00319
00320 jb->info.min = min;
00321 jb->info.jitter = jitter;
00322 }
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simple history manipulation
Definition at line 130 of file jitterbuf.c. References jb_info::cnt_delay_discont, jb_info::conf, jitterbuf::hist_maxbuf, jitterbuf::hist_maxbuf_valid, jitterbuf::hist_ptr, jitterbuf::history, jitterbuf::info, JB_HISTORY_MAXBUF_SZ, JB_HISTORY_SZ, jb_warn, jb_info::jitter, jb_info::last_delay, jb_info::resync_offset, and jb_conf::resync_threshold. Referenced by jb_put(). 00131 {
00132 long delay = now - (ts - jb->info.resync_offset);
00133 long threshold = 2 * jb->info.jitter + jb->info.conf.resync_threshold;
00134 long kicked;
00135
00136 /* don't add special/negative times to history */
00137 if (ts <= 0)
00138 return 0;
00139
00140 /* check for drastic change in delay */
00141 if (jb->info.conf.resync_threshold != -1) {
00142 if (abs(delay - jb->info.last_delay) > threshold) {
00143 jb->info.cnt_delay_discont++;
00144 if (jb->info.cnt_delay_discont > 3) {
00145 /* resync the jitterbuffer */
00146 jb->info.cnt_delay_discont = 0;
00147 jb->hist_ptr = 0;
00148 jb->hist_maxbuf_valid = 0;
00149
00150 jb_warn("Resyncing the jb. last_delay %ld, this delay %ld, threshold %ld, new offset %ld\n", jb->info.last_delay, delay, threshold, ts - now);
00151 jb->info.resync_offset = ts - now;
00152 jb->info.last_delay = delay = 0; /* after resync, frame is right on time */
00153 } else {
00154 return -1;
00155 }
00156 } else {
00157 jb->info.last_delay = delay;
00158 jb->info.cnt_delay_discont = 0;
00159 }
00160 }
00161
00162 kicked = jb->history[jb->hist_ptr % JB_HISTORY_SZ];
00163
00164 jb->history[(jb->hist_ptr++) % JB_HISTORY_SZ] = delay;
00165
00166 /* optimization; the max/min buffers don't need to be recalculated, if this packet's
00167 * entry doesn't change them. This happens if this packet is not involved, _and_ any packet
00168 * that got kicked out of the history is also not involved
00169 * We do a number of comparisons, but it's probably still worthwhile, because it will usually
00170 * succeed, and should be a lot faster than going through all 500 packets in history */
00171 if (!jb->hist_maxbuf_valid)
00172 return 0;
00173
00174 /* don't do this until we've filled history
00175 * (reduces some edge cases below) */
00176 if (jb->hist_ptr < JB_HISTORY_SZ)
00177 goto invalidate;
00178
00179 /* if the new delay would go into min */
00180 if (delay < jb->hist_minbuf[JB_HISTORY_MAXBUF_SZ-1])
00181 goto invalidate;
00182
00183 /* or max.. */
00184 if (delay > jb->hist_maxbuf[JB_HISTORY_MAXBUF_SZ-1])
00185 goto invalidate;
00186
00187 /* or the kicked delay would be in min */
00188 if (kicked <= jb->hist_minbuf[JB_HISTORY_MAXBUF_SZ-1])
00189 goto invalidate;
00190
00191 if (kicked >= jb->hist_maxbuf[JB_HISTORY_MAXBUF_SZ-1])
00192 goto invalidate;
00193
00194 /* if we got here, we don't need to invalidate, 'cause this delay didn't
00195 * affect things */
00196 return 0;
00197 /* end optimization */
00198
00199
00200 invalidate:
00201 jb->hist_maxbuf_valid = 0;
00202 return 0;
00203 }
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Definition at line 63 of file jitterbuf.c. References jitterbuf::info, and jb_info::losspct. Referenced by _jb_get().
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Definition at line 100 of file jitterbuf.c. References jitterbuf::free, free, jb_dbg2, and jb_frame::next. Referenced by iax2_destroy(). 00101 {
00102 jb_frame *frame;
00103 jb_dbg2("jb_destroy(%x)\n", jb);
00104
00105 /* free all the frames on the "free list" */
00106 frame = jb->free;
00107 while (frame != NULL) {
00108 jb_frame *next = frame->next;
00109 free(frame);
00110 frame = next;
00111 }
00112
00113 /* free ourselves! */
00114 free(jb);
00115 }
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Definition at line 779 of file jitterbuf.c. References _jb_get(), JB_DROP, JB_INTERP, JB_OK, jb_warn, jb_frame::ms, and jb_frame::ts. Referenced by get_from_jb(). 00780 {
00781 int ret = _jb_get(jb,frameout,now,interpl);
00782 #if 0
00783 static int lastts=0;
00784 int thists = ((ret == JB_OK) || (ret == JB_DROP)) ? frameout->ts : 0;
00785 jb_warn("jb_get(%x,%x,%ld) = %d (%d)\n", jb, frameout, now, ret, thists);
00786 if (thists && thists < lastts) jb_warn("XXXX timestamp roll-back!!!\n");
00787 lastts = thists;
00788 #endif
00789 if(ret == JB_INTERP)
00790 frameout->ms = jb->info.last_voice_ms;
00791
00792 return ret;
00793 }
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Definition at line 795 of file jitterbuf.c. References JB_NOFRAME, JB_OK, and queue_getall(). Referenced by complete_transfer(), iax2_destroy(), and schedule_delivery(). 00796 {
00797 jb_frame *frame;
00798 frame = queue_getall(jb);
00799
00800 if (!frame) {
00801 return JB_NOFRAME;
00802 }
00803
00804 *frameout = *frame;
00805 return JB_OK;
00806 }
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Definition at line 809 of file jitterbuf.c. References history_get(), and JB_OK. Referenced by ast_cli_netstats(), construct_rr(), and iax2_show_channels(). 00810 {
00811
00812 history_get(jb);
00813
00814 *stats = jb->info;
00815
00816 return JB_OK;
00817 }
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Definition at line 85 of file jitterbuf.c. References jb_dbg2, jb_reset(), and malloc. Referenced by new_iax(). 00086 {
00087 jitterbuf *jb;
00088
00089
00090 jb = malloc(sizeof(jitterbuf));
00091 if (!jb)
00092 return NULL;
00093
00094 jb_reset(jb);
00095
00096 jb_dbg2("jb_new() = %x\n", jb);
00097 return jb;
00098 }
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Definition at line 761 of file jitterbuf.c. References jb_info::current, history_get(), jitterbuf::info, JB_LONGMAX, JB_TARGET_EXTRA, jb_info::last_adjustment, jb_info::next_voice_ts, queue_next(), jb_info::silence_begin_ts, and jb_info::target. Referenced by get_from_jb(), and update_jbsched(). 00762 {
00763 if (jb->info.silence_begin_ts) {
00764 long next = queue_next(jb);
00765 if (next > 0) {
00766 history_get(jb);
00767 /* shrink during silence */
00768 if (jb->info.target - jb->info.current < -JB_TARGET_EXTRA)
00769 return jb->info.last_adjustment + 10;
00770 return next + jb->info.target;
00771 }
00772 else
00773 return JB_LONGMAX;
00774 } else {
00775 return jb->info.next_voice_ts;
00776 }
00777 }
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Definition at line 518 of file jitterbuf.c. References jb_info::frames_in, history_put(), jitterbuf::info, jb_dbg2, JB_DROP, JB_OK, JB_SCHED, JB_TYPE_VOICE, and queue_put(). Referenced by schedule_delivery(). 00519 {
00520 jb_dbg2("jb_put(%x,%x,%ld,%ld,%ld)\n", jb, data, ms, ts, now);
00521
00522 jb->info.frames_in++;
00523
00524 if (type == JB_TYPE_VOICE) {
00525 /* presently, I'm only adding VOICE frames to history and drift calculations; mostly because with the
00526 * IAX integrations, I'm sending retransmitted control frames with their awkward timestamps through */
00527 if (history_put(jb,ts,now,ms))
00528 return JB_DROP;
00529 }
00530
00531 /* if put into head of queue, caller needs to reschedule */
00532 if (queue_put(jb,data,type,ms,ts)) {
00533 return JB_SCHED;
00534 }
00535 return JB_OK;
00536 }
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Definition at line 73 of file jitterbuf.c. References jb_info::conf, jb_info::current, jitterbuf::info, JB_TARGET_EXTRA, s, jb_info::silence_begin_ts, and jb_info::target. Referenced by complete_transfer(), jb_new(), and schedule_delivery(). 00074 {
00075 /* only save settings */
00076 jb_conf s = jb->info.conf;
00077 memset(jb,0,sizeof(jitterbuf));
00078 jb->info.conf = s;
00079
00080 /* initialize length */
00081 jb->info.current = jb->info.target = JB_TARGET_EXTRA;
00082 jb->info.silence_begin_ts = -1;
00083 }
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Definition at line 819 of file jitterbuf.c. References jb_info::conf, jitterbuf::info, JB_OK, jb_conf::max_contig_interp, jb_conf::max_jitterbuf, and jb_conf::resync_threshold. Referenced by new_iax(). 00820 {
00821 /* take selected settings from the struct */
00822
00823 jb->info.conf.max_jitterbuf = conf->max_jitterbuf;
00824 jb->info.conf.resync_threshold = conf->resync_threshold;
00825 jb->info.conf.max_contig_interp = conf->max_contig_interp;
00826
00827 return JB_OK;
00828 }
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Definition at line 56 of file jitterbuf.c. References dbgf, errf, and warnf. Referenced by iax2_do_jb_debug(), iax2_no_jb_debug(), and load_module().
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Definition at line 442 of file jitterbuf.c. References _queue_get(). Referenced by _jb_get(). 00443 {
00444 return _queue_get(jb,ts,0);
00445 }
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Definition at line 447 of file jitterbuf.c. References _queue_get(). Referenced by jb_getall(). 00448 {
00449 return _queue_get(jb,0,1);
00450 }
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Definition at line 399 of file jitterbuf.c. References jitterbuf::frames, jb_frame::prev, and jb_frame::ts. Referenced by _jb_get(). 00400 {
00401 if (jb->frames)
00402 return jb->frames->prev->ts;
00403 else
00404 return -1;
00405 }
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Definition at line 391 of file jitterbuf.c. References jitterbuf::frames, and jb_frame::ts. Referenced by _jb_get(), and jb_next().
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Definition at line 325 of file jitterbuf.c. References jb_frame::data, frames, jitterbuf::frames, jb_info::frames_cur, jb_info::frames_ooo, jitterbuf::free, jitterbuf::info, jb_err, malloc, jb_frame::ms, jb_frame::next, jb_frame::prev, jb_info::resync_offset, jb_frame::ts, and jb_frame::type. Referenced by jb_put(). 00326 {
00327 jb_frame *frame;
00328 jb_frame *p;
00329 int head = 0;
00330 long resync_ts = ts - jb->info.resync_offset;
00331
00332 frame = jb->free;
00333 if (frame) {
00334 jb->free = frame->next;
00335 } else {
00336 frame = malloc(sizeof(jb_frame));
00337 }
00338
00339 if (!frame) {
00340 jb_err("cannot allocate frame\n");
00341 return 0;
00342 }
00343
00344 jb->info.frames_cur++;
00345
00346 frame->data = data;
00347 frame->ts = resync_ts;
00348 frame->ms = ms;
00349 frame->type = type;
00350
00351 /*
00352 * frames are a circular list, jb-frames points to to the lowest ts,
00353 * jb->frames->prev points to the highest ts
00354 */
00355
00356 if (!jb->frames) { /* queue is empty */
00357 jb->frames = frame;
00358 frame->next = frame;
00359 frame->prev = frame;
00360 head = 1;
00361 } else if (resync_ts < jb->frames->ts) {
00362 frame->next = jb->frames;
00363 frame->prev = jb->frames->prev;
00364
00365 frame->next->prev = frame;
00366 frame->prev->next = frame;
00367
00368 /* frame is out of order */
00369 jb->info.frames_ooo++;
00370
00371 jb->frames = frame;
00372 head = 1;
00373 } else {
00374 p = jb->frames;
00375
00376 /* frame is out of order */
00377 if (resync_ts < p->prev->ts) jb->info.frames_ooo++;
00378
00379 while (resync_ts < p->prev->ts && p->prev != jb->frames)
00380 p = p->prev;
00381
00382 frame->next = p;
00383 frame->prev = p->prev;
00384
00385 frame->next->prev = frame;
00386 frame->prev->next = frame;
00387 }
00388 return head;
00389 }
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Definition at line 54 of file jitterbuf.c. Referenced by jb_setoutput(). |
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Definition at line 54 of file jitterbuf.c. Referenced by jb_setoutput(). |
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Definition at line 54 of file jitterbuf.c. Referenced by jb_setoutput(). |
1.4.2