diff options
Diffstat (limited to 'funcs/func_jitterbuffer.c')
| -rw-r--r-- | funcs/func_jitterbuffer.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/funcs/func_jitterbuffer.c b/funcs/func_jitterbuffer.c index e613e6a23..dd1de604a 100644 --- a/funcs/func_jitterbuffer.c +++ b/funcs/func_jitterbuffer.c @@ -203,6 +203,7 @@ static struct ast_frame *hook_event_cb(struct ast_channel *chan, struct ast_fram struct jb_framedata *framedata = data; struct timeval now_tv; unsigned long now; + int putframe = 0; /* signifies if audio frame was placed into the buffer or not */ switch (event) { case AST_FRAMEHOOK_EVENT_READ: @@ -249,15 +250,31 @@ static struct ast_frame *hook_event_cb(struct ast_channel *chan, struct ast_fram if (res == AST_JB_IMPL_OK) { frame = &ast_null_frame; } + putframe = 1; } if (frame->frametype == AST_FRAME_NULL) { int res; long next = framedata->jb_impl->next(framedata->jb_obj); + /* If now is earlier than the next expected output frame + * from the jitterbuffer we may choose to pass on retrieving + * a frame during this read iteration. The only exception + * to this rule is when an audio frame is placed into the buffer + * and the time for the next frame to come out of the buffer is + * at least within the timer_interval of the next output frame. By + * doing this we are able to feed off the timing of the input frames + * and only rely on our jitterbuffer timer when frames are dropped. + * During testing, this hybrid form of timing gave more reliable results. */ if (now < next) { - return frame; + long int diff = next - now; + if (!putframe) { + return frame; + } else if (diff >= framedata->timer_interval) { + return frame; + } } + res = framedata->jb_impl->get(framedata->jb_obj, &frame, now, framedata->timer_interval); switch (res) { case AST_JB_IMPL_OK: |