#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "asterisk.h"
#include "jitterbuf.h"
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.
|
Definition at line 46 of file jitterbuf.c. Referenced by _jb_get(). |
|
Definition at line 51 of file jitterbuf.c. Referenced by jb_destroy(), jb_new(), and jb_put(). |
|
Definition at line 45 of file jitterbuf.c. Referenced by queue_put(). |
|
define these here, just for ancient compiler systems Definition at line 41 of file jitterbuf.c. Referenced by history_calc_maxbuf(), and jb_next(). |
|
Definition at line 42 of file jitterbuf.c. Referenced by history_calc_maxbuf(). |
|
Definition at line 44 of file jitterbuf.c. Referenced by history_put(), and jb_get(). |
|
Definition at line 539 of file jitterbuf.c. References jb_info::cnt_contig_interp, jb_info::conf, jb_info::current, decrement_losspct(), jb_info::frames_dropped, jb_info::frames_late, jb_info::frames_lost, jb_info::frames_out, history_get(), increment_losspct(), jitterbuf::info, JB_ADJUST_DELAY, jb_dbg, JB_DROP, JB_INTERP, JB_NOFRAME, JB_OK, JB_TARGET_EXTRA, JB_TYPE_SILENCE, JB_TYPE_VOICE, jb_info::jitter, jb_info::last_adjustment, jb_info::last_voice_ms, jb_conf::max_contig_interp, jb_conf::max_jitterbuf, jb_info::min, jb_frame::ms, jb_info::next_voice_ts, queue_get(), queue_last(), queue_next(), jb_info::silence_begin_ts, jb_info::target, 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 }
|
|
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 }
|
|
Definition at line 68 of file jitterbuf.c. References jitterbuf::info, and jb_info::losspct. Referenced by _jb_get().
|
|
Definition at line 205 of file jitterbuf.c. References jitterbuf::hist_maxbuf, jitterbuf::hist_minbuf, jitterbuf::hist_ptr, JB_HISTORY_MAXBUF_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 }
|
|
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_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 }
|
|
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 }
|
|
Definition at line 63 of file jitterbuf.c. References jitterbuf::info, and jb_info::losspct. Referenced by _jb_get().
|
|
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 }
|
|
Definition at line 779 of file jitterbuf.c. References _jb_get(), jitterbuf::info, JB_DROP, JB_INTERP, JB_OK, jb_warn, jb_info::last_voice_ms, 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 }
|
|
Definition at line 795 of file jitterbuf.c. References JB_NOFRAME, JB_OK, and queue_getall(). Referenced by complete_transfer(), and iax2_destroy(). 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 }
|
|
Definition at line 809 of file jitterbuf.c. References history_get(), jitterbuf::info, and JB_OK. Referenced by construct_rr(), and iax2_show_channels(). 00810 { 00811 00812 history_get(jb); 00813 00814 *stats = jb->info; 00815 00816 return JB_OK; 00817 }
|
|
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 }
|
|
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 }
|
|
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(). 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 }
|
|
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(), and jb_new(). 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 }
|
|
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 }
|
|
Definition at line 56 of file jitterbuf.c. Referenced by iax2_do_jb_debug(), iax2_no_jb_debug(), and load_module().
|
|
Definition at line 442 of file jitterbuf.c. References _queue_get(). Referenced by _jb_get(). 00443 { 00444 return _queue_get(jb,ts,0); 00445 }
|
|
Definition at line 447 of file jitterbuf.c. References _queue_get(). Referenced by jb_getall(). 00448 { 00449 return _queue_get(jb,0,1); 00450 }
|
|
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 }
|
|
Definition at line 391 of file jitterbuf.c. References jitterbuf::frames, and jb_frame::ts. Referenced by _jb_get(), and jb_next().
|
|
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 }
|
|
Definition at line 54 of file jitterbuf.c. |
|
Definition at line 54 of file jitterbuf.c. |
|
Definition at line 54 of file jitterbuf.c. |