#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "jitterbuf.h"
#include "asterisk/utils.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 enum jb_return_code | _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) |
enum jb_return_code | jb_get (jitterbuf *jb, jb_frame *frameout, long now, long interpl) |
enum jb_return_code | jb_getall (jitterbuf *jb, jb_frame *frameout) |
enum jb_return_code | jb_getinfo (jitterbuf *jb, jb_info *stats) |
jitterbuf * | jb_new () |
long | jb_next (jitterbuf *jb) |
enum jb_return_code | jb_put (jitterbuf *jb, void *data, const enum jb_frame_type type, long ms, long ts, long now) |
void | jb_reset (jitterbuf *jb) |
enum jb_return_code | 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, const enum jb_frame_type 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.
#define jb_dbg2 | ( | ) | ((void)0) |
#define JB_LONGMAX 2147483647L |
define these here, just for ancient compiler systems
Definition at line 43 of file jitterbuf.c.
Referenced by history_calc_maxbuf(), and jb_next().
#define JB_LONGMIN (-JB_LONGMAX - 1L) |
static enum jb_return_code _jb_get | ( | jitterbuf * | jb, | |
jb_frame * | frameout, | |||
long | now, | |||
long | interpl | |||
) | [static] |
Definition at line 554 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().
00555 { 00556 jb_frame *frame; 00557 long diff; 00558 static int dbg_cnt = 0; 00559 00560 /*if ((now - jb_next(jb)) > 2 * jb->info.last_voice_ms) jb_warn("SCHED: %ld", (now - jb_next(jb))); */ 00561 /* get jitter info */ 00562 history_get(jb); 00563 00564 if (dbg_cnt && dbg_cnt % 50 == 0) { 00565 jb_dbg("\n"); 00566 } 00567 dbg_cnt++; 00568 00569 /* target */ 00570 jb->info.target = jb->info.jitter + jb->info.min + JB_TARGET_EXTRA; 00571 00572 /* if a hard clamp was requested, use it */ 00573 if ((jb->info.conf.max_jitterbuf) && ((jb->info.target - jb->info.min) > jb->info.conf.max_jitterbuf)) { 00574 jb_dbg("clamping target from %ld to %ld\n", (jb->info.target - jb->info.min), jb->info.conf.max_jitterbuf); 00575 jb->info.target = jb->info.min + jb->info.conf.max_jitterbuf; 00576 } 00577 00578 diff = jb->info.target - jb->info.current; 00579 00580 /* jb_warn("diff = %d lms=%d last = %d now = %d\n", diff, */ 00581 /* jb->info.last_voice_ms, jb->info.last_adjustment, now); */ 00582 00583 /* let's work on non-silent case first */ 00584 if (!jb->info.silence_begin_ts) { 00585 /* we want to grow */ 00586 if ((diff > 0) && 00587 /* we haven't grown in the delay length */ 00588 (((jb->info.last_adjustment + JB_ADJUST_DELAY) < now) || 00589 /* we need to grow more than the "length" we have left */ 00590 (diff > queue_last(jb) - queue_next(jb)) ) ) { 00591 /* grow by interp frame length */ 00592 jb->info.current += interpl; 00593 jb->info.next_voice_ts += interpl; 00594 jb->info.last_voice_ms = interpl; 00595 jb->info.last_adjustment = now; 00596 jb->info.cnt_contig_interp++; 00597 if (jb->info.conf.max_contig_interp && jb->info.cnt_contig_interp >= jb->info.conf.max_contig_interp) { 00598 jb->info.silence_begin_ts = jb->info.next_voice_ts - jb->info.current; 00599 } 00600 jb_dbg("G"); 00601 return JB_INTERP; 00602 } 00603 00604 frame = queue_get(jb, jb->info.next_voice_ts - jb->info.current); 00605 00606 /* not a voice frame; just return it. */ 00607 if (frame && frame->type != JB_TYPE_VOICE) { 00608 if (frame->type == JB_TYPE_SILENCE) { 00609 jb->info.silence_begin_ts = frame->ts; 00610 jb->info.cnt_contig_interp = 0; 00611 } 00612 00613 *frameout = *frame; 00614 jb->info.frames_out++; 00615 jb_dbg("o"); 00616 return JB_OK; 00617 } 00618 00619 00620 /* voice frame is later than expected */ 00621 if (frame && frame->ts + jb->info.current < jb->info.next_voice_ts) { 00622 if (frame->ts + jb->info.current > jb->info.next_voice_ts - jb->info.last_voice_ms) { 00623 /* either we interpolated past this frame in the last jb_get */ 00624 /* or the frame is still in order, but came a little too quick */ 00625 *frameout = *frame; 00626 /* reset expectation for next frame */ 00627 jb->info.next_voice_ts = frame->ts + jb->info.current + frame->ms; 00628 jb->info.frames_out++; 00629 decrement_losspct(jb); 00630 jb->info.cnt_contig_interp = 0; 00631 jb_dbg("v"); 00632 return JB_OK; 00633 } else { 00634 /* voice frame is late */ 00635 *frameout = *frame; 00636 jb->info.frames_out++; 00637 decrement_losspct(jb); 00638 jb->info.frames_late++; 00639 jb->info.frames_lost--; 00640 jb_dbg("l"); 00641 /*jb_warn("\nlate: wanted=%ld, this=%ld, next=%ld\n", jb->info.next_voice_ts - jb->info.current, frame->ts, queue_next(jb)); 00642 jb_warninfo(jb); */ 00643 return JB_DROP; 00644 } 00645 } 00646 00647 /* keep track of frame sizes, to allow for variable sized-frames */ 00648 if (frame && frame->ms > 0) { 00649 jb->info.last_voice_ms = frame->ms; 00650 } 00651 00652 /* we want to shrink; shrink at 1 frame / 500ms */ 00653 /* unless we don't have a frame, then shrink 1 frame */ 00654 /* every 80ms (though perhaps we can shrink even faster */ 00655 /* in this case) */ 00656 if (diff < -JB_TARGET_EXTRA && 00657 ((!frame && jb->info.last_adjustment + 80 < now) || 00658 (jb->info.last_adjustment + 500 < now))) { 00659 00660 jb->info.last_adjustment = now; 00661 jb->info.cnt_contig_interp = 0; 00662 00663 if (frame) { 00664 *frameout = *frame; 00665 /* shrink by frame size we're throwing out */ 00666 jb->info.current -= frame->ms; 00667 jb->info.frames_out++; 00668 decrement_losspct(jb); 00669 jb->info.frames_dropped++; 00670 jb_dbg("s"); 00671 return JB_DROP; 00672 } else { 00673 /* shrink by last_voice_ms */ 00674 jb->info.current -= jb->info.last_voice_ms; 00675 jb->info.frames_lost++; 00676 increment_losspct(jb); 00677 jb_dbg("S"); 00678 return JB_NOFRAME; 00679 } 00680 } 00681 00682 /* lost frame */ 00683 if (!frame) { 00684 /* this is a bit of a hack for now, but if we're close to 00685 * target, and we find a missing frame, it makes sense to 00686 * grow, because the frame might just be a bit late; 00687 * otherwise, we presently get into a pattern where we return 00688 * INTERP for the lost frame, then it shows up next, and we 00689 * throw it away because it's late */ 00690 /* I've recently only been able to replicate this using 00691 * iaxclient talking to app_echo on asterisk. In this case, 00692 * my outgoing packets go through asterisk's (old) 00693 * jitterbuffer, and then might get an unusual increasing delay 00694 * there if it decides to grow?? */ 00695 /* Update: that might have been a different bug, that has been fixed.. 00696 * But, this still seemed like a good idea, except that it ended up making a single actual 00697 * lost frame get interpolated two or more times, when there was "room" to grow, so it might 00698 * be a bit of a bad idea overall */ 00699 /*if (diff > -1 * jb->info.last_voice_ms) { 00700 jb->info.current += jb->info.last_voice_ms; 00701 jb->info.last_adjustment = now; 00702 jb_warn("g"); 00703 return JB_INTERP; 00704 } */ 00705 jb->info.frames_lost++; 00706 increment_losspct(jb); 00707 jb->info.next_voice_ts += interpl; 00708 jb->info.last_voice_ms = interpl; 00709 jb->info.cnt_contig_interp++; 00710 if (jb->info.conf.max_contig_interp && jb->info.cnt_contig_interp >= jb->info.conf.max_contig_interp) { 00711 jb->info.silence_begin_ts = jb->info.next_voice_ts - jb->info.current; 00712 } 00713 jb_dbg("L"); 00714 return JB_INTERP; 00715 } 00716 00717 /* normal case; return the frame, increment stuff */ 00718 *frameout = *frame; 00719 jb->info.next_voice_ts += frame->ms; 00720 jb->info.frames_out++; 00721 jb->info.cnt_contig_interp = 0; 00722 decrement_losspct(jb); 00723 jb_dbg("v"); 00724 return JB_OK; 00725 } else { 00726 /* TODO: after we get the non-silent case down, we'll make the 00727 * silent case -- basically, we'll just grow and shrink faster 00728 * here, plus handle next_voice_ts a bit differently */ 00729 00730 /* to disable silent special case altogether, just uncomment this: */ 00731 /* jb->info.silence_begin_ts = 0; */ 00732 00733 /* shrink interpl len every 10ms during silence */ 00734 if (diff < -JB_TARGET_EXTRA && 00735 jb->info.last_adjustment + 10 <= now) { 00736 jb->info.current -= interpl; 00737 jb->info.last_adjustment = now; 00738 } 00739 00740 frame = queue_get(jb, now - jb->info.current); 00741 if (!frame) { 00742 return JB_NOFRAME; 00743 } else if (frame->type != JB_TYPE_VOICE) { 00744 /* normal case; in silent mode, got a non-voice frame */ 00745 *frameout = *frame; 00746 jb->info.frames_out++; 00747 return JB_OK; 00748 } 00749 if (frame->ts < jb->info.silence_begin_ts) { 00750 /* voice frame is late */ 00751 *frameout = *frame; 00752 jb->info.frames_out++; 00753 decrement_losspct(jb); 00754 jb->info.frames_late++; 00755 jb->info.frames_lost--; 00756 jb_dbg("l"); 00757 /*jb_warn("\nlate: wanted=%ld, this=%ld, next=%ld\n", jb->info.next_voice_ts - jb->info.current, frame->ts, queue_next(jb)); 00758 jb_warninfo(jb); */ 00759 return JB_DROP; 00760 } else { 00761 /* voice frame */ 00762 /* try setting current to target right away here */ 00763 jb->info.current = jb->info.target; 00764 jb->info.silence_begin_ts = 0; 00765 jb->info.next_voice_ts = frame->ts + jb->info.current + frame->ms; 00766 jb->info.last_voice_ms = frame->ms; 00767 jb->info.frames_out++; 00768 decrement_losspct(jb); 00769 *frameout = *frame; 00770 jb_dbg("V"); 00771 return JB_OK; 00772 } 00773 } 00774 }
Definition at line 402 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().
00403 { 00404 jb_frame *frame; 00405 frame = jb->frames; 00406 00407 if (!frame) 00408 return NULL; 00409 00410 /*jb_warn("queue_get: ASK %ld FIRST %ld\n", ts, frame->ts); */ 00411 00412 if (all || ts >= frame->ts) { 00413 /* remove this frame */ 00414 frame->prev->next = frame->next; 00415 frame->next->prev = frame->prev; 00416 00417 if (frame->next == frame) 00418 jb->frames = NULL; 00419 else 00420 jb->frames = frame->next; 00421 00422 00423 /* insert onto "free" single-linked list */ 00424 frame->next = jb->free; 00425 jb->free = frame; 00426 00427 jb->info.frames_cur--; 00428 00429 /* we return the frame pointer, even though it's on free list, 00430 * but caller must copy data */ 00431 return frame; 00432 } 00433 00434 return NULL; 00435 }
static void decrement_losspct | ( | jitterbuf * | jb | ) | [static] |
Definition at line 70 of file jitterbuf.c.
References jitterbuf::info, and jb_info::losspct.
Referenced by _jb_get().
static void history_calc_maxbuf | ( | jitterbuf * | jb | ) | [static] |
Definition at line 205 of file jitterbuf.c.
References jitterbuf::hist_maxbuf, 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(jb->hist_maxbuf[0])); 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(jb->hist_minbuf[0])); 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 }
static void history_get | ( | jitterbuf * | jb | ) | [static] |
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 }
static int history_put | ( | jitterbuf * | jb, | |
long | ts, | |||
long | now, | |||
long | ms | |||
) | [static] |
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 }
static void increment_losspct | ( | jitterbuf * | jb | ) | [static] |
Definition at line 65 of file jitterbuf.c.
References jitterbuf::info, and jb_info::losspct.
Referenced by _jb_get().
void jb_destroy | ( | jitterbuf * | jb | ) |
Definition at line 100 of file jitterbuf.c.
References jitterbuf::free, free, jb_dbg2, and jb_frame::next.
Referenced by jb_destroy_adaptive(), and pvt_destructor().
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 }
enum jb_return_code jb_get | ( | jitterbuf * | jb, | |
jb_frame * | frameout, | |||
long | now, | |||
long | interpl | |||
) |
Definition at line 794 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(), and jb_get_adaptive().
00795 { 00796 enum jb_return_code ret = _jb_get(jb, frameout, now, interpl); 00797 #if 0 00798 static int lastts=0; 00799 int thists = ((ret == JB_OK) || (ret == JB_DROP)) ? frameout->ts : 0; 00800 jb_warn("jb_get(%x,%x,%ld) = %d (%d)\n", jb, frameout, now, ret, thists); 00801 if (thists && thists < lastts) jb_warn("XXXX timestamp roll-back!!!\n"); 00802 lastts = thists; 00803 #endif 00804 if(ret == JB_INTERP) 00805 frameout->ms = jb->info.last_voice_ms; 00806 00807 return ret; 00808 }
enum jb_return_code jb_getall | ( | jitterbuf * | jb, | |
jb_frame * | frameout | |||
) |
Definition at line 810 of file jitterbuf.c.
References JB_NOFRAME, JB_OK, and queue_getall().
Referenced by complete_transfer(), jb_empty_and_reset_adaptive(), jb_remove_adaptive(), pvt_destructor(), and schedule_delivery().
00811 { 00812 jb_frame *frame; 00813 frame = queue_getall(jb); 00814 00815 if (!frame) { 00816 return JB_NOFRAME; 00817 } 00818 00819 *frameout = *frame; 00820 return JB_OK; 00821 }
enum jb_return_code jb_getinfo | ( | jitterbuf * | jb, | |
jb_info * | stats | |||
) |
Definition at line 824 of file jitterbuf.c.
References history_get(), jitterbuf::info, and JB_OK.
Referenced by ast_cli_netstats(), construct_rr(), and iax2_show_channels().
00825 { 00826 00827 history_get(jb); 00828 00829 *stats = jb->info; 00830 00831 return JB_OK; 00832 }
jitterbuf* jb_new | ( | void | ) |
Definition at line 87 of file jitterbuf.c.
References ast_malloc, jb_dbg2, and jb_reset().
Referenced by jb_create_adaptive(), and new_iax().
00088 { 00089 jitterbuf *jb; 00090 00091 if (!(jb = ast_malloc(sizeof(*jb)))) 00092 return NULL; 00093 00094 jb_reset(jb); 00095 00096 jb_dbg2("jb_new() = %x\n", jb); 00097 return jb; 00098 }
long jb_next | ( | jitterbuf * | jb | ) |
Definition at line 776 of file jitterbuf.c.
References jb_info::current, jitterbuf::frames, 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(), jb_next_adaptive(), and update_jbsched().
00777 { 00778 if (jb->info.silence_begin_ts) { 00779 if (jb->frames) { 00780 long next = queue_next(jb); 00781 history_get(jb); 00782 /* shrink during silence */ 00783 if (jb->info.target - jb->info.current < -JB_TARGET_EXTRA) 00784 return jb->info.last_adjustment + 10; 00785 return next + jb->info.target; 00786 } 00787 else 00788 return JB_LONGMAX; 00789 } else { 00790 return jb->info.next_voice_ts; 00791 } 00792 }
enum jb_return_code jb_put | ( | jitterbuf * | jb, | |
void * | data, | |||
const enum jb_frame_type | type, | |||
long | ms, | |||
long | ts, | |||
long | now | |||
) |
Definition at line 513 of file jitterbuf.c.
References ast_log(), jb_info::conf, jitterbuf::dropem, jitterbuf::frames, jb_info::frames_dropped, jb_info::frames_in, history_put(), jitterbuf::info, jb_dbg2, JB_DROP, JB_OK, JB_SCHED, JB_TYPE_VOICE, LOG_DEBUG, jb_conf::max_jitterbuf, jb_frame::prev, queue_put(), and jb_frame::ts.
Referenced by jb_put_adaptive(), and schedule_delivery().
00514 { 00515 long numts; 00516 00517 jb_dbg2("jb_put(%x,%x,%ld,%ld,%ld)\n", jb, data, ms, ts, now); 00518 00519 numts = 0; 00520 if (jb->frames) 00521 numts = jb->frames->prev->ts - jb->frames->ts; 00522 00523 if (numts >= jb->info.conf.max_jitterbuf) { 00524 if (!jb->dropem) { 00525 ast_log(LOG_DEBUG, "Attempting to exceed Jitterbuf max %ld timeslots\n", 00526 jb->info.conf.max_jitterbuf); 00527 jb->dropem = 1; 00528 } 00529 jb->info.frames_dropped++; 00530 return JB_DROP; 00531 } else { 00532 jb->dropem = 0; 00533 } 00534 00535 if (type == JB_TYPE_VOICE) { 00536 /* presently, I'm only adding VOICE frames to history and drift calculations; mostly because with the 00537 * IAX integrations, I'm sending retransmitted control frames with their awkward timestamps through */ 00538 if (history_put(jb,ts,now,ms)) { 00539 jb->info.frames_dropped++; 00540 return JB_DROP; 00541 } 00542 } 00543 00544 jb->info.frames_in++; 00545 00546 /* if put into head of queue, caller needs to reschedule */ 00547 if (queue_put(jb,data,type,ms,ts)) { 00548 return JB_SCHED; 00549 } 00550 return JB_OK; 00551 }
void jb_reset | ( | jitterbuf * | jb | ) |
Definition at line 75 of file jitterbuf.c.
References jb_info::conf, jitterbuf::info, JB_TARGET_EXTRA, and s.
Referenced by complete_transfer(), jb_empty_and_reset_adaptive(), jb_new(), and schedule_delivery().
00076 { 00077 /* only save settings */ 00078 jb_conf s = jb->info.conf; 00079 memset(jb, 0, sizeof(*jb)); 00080 jb->info.conf = s; 00081 00082 /* initialize length */ 00083 jb->info.current = jb->info.target = JB_TARGET_EXTRA; 00084 jb->info.silence_begin_ts = -1; 00085 }
enum jb_return_code jb_setconf | ( | jitterbuf * | jb, | |
jb_conf * | conf | |||
) |
Definition at line 834 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 jb_create_adaptive(), and new_iax().
00835 { 00836 /* take selected settings from the struct */ 00837 00838 jb->info.conf.max_jitterbuf = conf->max_jitterbuf; 00839 jb->info.conf.resync_threshold = conf->resync_threshold; 00840 jb->info.conf.max_contig_interp = conf->max_contig_interp; 00841 00842 return JB_OK; 00843 }
void jb_setoutput | ( | jb_output_function_t | err, | |
jb_output_function_t | warn, | |||
jb_output_function_t | dbg | |||
) |
Definition at line 58 of file jitterbuf.c.
Referenced by iax2_do_jb_debug(), iax2_no_jb_debug(), and load_module().
Definition at line 437 of file jitterbuf.c.
References _queue_get().
Referenced by _jb_get().
00438 { 00439 return _queue_get(jb,ts,0); 00440 }
Definition at line 442 of file jitterbuf.c.
References _queue_get().
Referenced by jb_getall().
00443 { 00444 return _queue_get(jb,0,1); 00445 }
static long queue_last | ( | jitterbuf * | jb | ) | [static] |
Definition at line 394 of file jitterbuf.c.
References jitterbuf::frames, jb_frame::prev, and jb_frame::ts.
Referenced by _jb_get().
00395 { 00396 if (jb->frames) 00397 return jb->frames->prev->ts; 00398 else 00399 return -1; 00400 }
static long queue_next | ( | jitterbuf * | jb | ) | [static] |
Definition at line 386 of file jitterbuf.c.
References jitterbuf::frames, and jb_frame::ts.
Referenced by _jb_get(), and jb_next().
static int queue_put | ( | jitterbuf * | jb, | |
void * | data, | |||
const enum jb_frame_type | type, | |||
long | ms, | |||
long | ts | |||
) | [static] |
Definition at line 325 of file jitterbuf.c.
References ast_malloc, frames, jitterbuf::frames, jb_info::frames_cur, jb_info::frames_ooo, jitterbuf::free, jitterbuf::info, jb_err, jb_frame::next, jb_frame::prev, and jb_info::resync_offset.
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 if ((frame = jb->free)) { 00333 jb->free = frame->next; 00334 } else if (!(frame = ast_malloc(sizeof(*frame)))) { 00335 jb_err("cannot allocate frame\n"); 00336 return 0; 00337 } 00338 00339 jb->info.frames_cur++; 00340 00341 frame->data = data; 00342 frame->ts = resync_ts; 00343 frame->ms = ms; 00344 frame->type = type; 00345 00346 /* 00347 * frames are a circular list, jb-frames points to to the lowest ts, 00348 * jb->frames->prev points to the highest ts 00349 */ 00350 00351 if (!jb->frames) { /* queue is empty */ 00352 jb->frames = frame; 00353 frame->next = frame; 00354 frame->prev = frame; 00355 head = 1; 00356 } else if (resync_ts < jb->frames->ts) { 00357 frame->next = jb->frames; 00358 frame->prev = jb->frames->prev; 00359 00360 frame->next->prev = frame; 00361 frame->prev->next = frame; 00362 00363 /* frame is out of order */ 00364 jb->info.frames_ooo++; 00365 00366 jb->frames = frame; 00367 head = 1; 00368 } else { 00369 p = jb->frames; 00370 00371 /* frame is out of order */ 00372 if (resync_ts < p->prev->ts) jb->info.frames_ooo++; 00373 00374 while (resync_ts < p->prev->ts && p->prev != jb->frames) 00375 p = p->prev; 00376 00377 frame->next = p; 00378 frame->prev = p->prev; 00379 00380 frame->next->prev = frame; 00381 frame->prev->next = frame; 00382 } 00383 return head; 00384 }
jb_output_function_t dbgf [static] |
Definition at line 56 of file jitterbuf.c.
jb_output_function_t errf [static] |
Definition at line 56 of file jitterbuf.c.
jb_output_function_t warnf [static] |
Definition at line 56 of file jitterbuf.c.