return true;
}
-void DeckLinkOutput::start_output(uint32_t mode, int64_t base_pts)
+void DeckLinkOutput::start_output(uint32_t mode, int64_t base_pts, bool is_master_card)
{
assert(output);
assert(!playback_initiated);
should_quit.unquit();
playback_initiated = true;
playback_started = false;
- this->base_pts = base_pts;
+ if (is_master_card) {
+ this->base_pts = base_pts;
+ } else {
+ this->next_output_pts = 0;
+ }
IDeckLinkConfiguration *config = nullptr;
if (output->QueryInterface(IID_IDeckLinkConfiguration, (void**)&config) != S_OK) {
fprintf(stderr, "Couldn't enable audio output\n");
abort();
}
- if (output->BeginAudioPreroll() != S_OK) {
- fprintf(stderr, "Couldn't begin audio preroll\n");
- abort();
+ if (is_master_card) {
+ if (output->BeginAudioPreroll() != S_OK) {
+ fprintf(stderr, "Couldn't begin audio preroll\n");
+ abort();
+ }
+ } else {
+ if (output->StartScheduledPlayback(/*base_pts=*/0, TIMEBASE, 1.0) != S_OK) {
+ fprintf(stderr, "Could not start playback\n");
+ abort(); // TODO
+ }
+ playback_started = true;
}
present_thread = thread([this]{
{
assert(!should_quit.should_quit());
+ input_jitter_history.frame_arrived(steady_clock::now(), duration, /*dropped_frames=*/0, true);
+
if ((current_mode_flags & bmdDisplayModeColorspaceRec601) && output_ycbcr_coefficients == YCBCR_REC_709) {
if (!last_frame_had_mode_mismatch) {
fprintf(stderr, "WARNING: Chosen output mode expects Rec. 601 Y'CbCr coefficients.\n");
void DeckLinkOutput::send_audio(int64_t pts, const std::vector<float> &samples)
{
+ return; // FIXME we may need to map pts or something?
+
unique_ptr<int32_t[]> int_samples(new int32_t[samples.size()]);
for (size_t i = 0; i < samples.size(); ++i) {
int_samples[i] = lrintf(samples[i] * 2147483648.0f);
}
// Prioritize 59.94 > 60 > 29.97. If none of those are found, then pick the highest one.
- for (const pair<int, int> &desired : vector<pair<int, int>>{ { 60000, 1001 }, { 60, 1 }, { 30000, 1001 } }) {
+ for (const pair<int, int> &desired : vector<pair<int, int>>{ { 50, 1 }, { 60000, 1001 }, { 60, 1 }, { 30000, 1001 } }) {
for (const auto &it : video_modes) {
if (it.second.frame_rate_num * desired.second == desired.first * it.second.frame_rate_den) {
return it.first;
HRESULT DeckLinkOutput::ScheduledFrameCompleted(/* in */ IDeckLinkVideoFrame *completedFrame, /* in */ BMDOutputFrameCompletionResult result)
{
Frame *frame = static_cast<Frame *>(completedFrame);
+
+ BMDTimeValue stream_frame_time, played_at_time;
+ BMDTimeValue hardwareTime, timeInFrame, ticksPerFrame;
+ double playback_speed;
+ output->GetFrameCompletionReferenceTimestamp(frame, TIMEBASE, &played_at_time);
+ output->GetScheduledStreamTime(TIMEBASE, &stream_frame_time, &playback_speed);
+ output->GetHardwareReferenceClock(TIMEBASE, &hardwareTime, &timeInFrame, &ticksPerFrame);
+
+ steady_clock::time_point now = steady_clock::now();
+ int frame_delay = (stream_frame_time - frame->pts) / frame_duration - 1;
+ map<int, string> status = {
+ { bmdOutputFrameCompleted, "played" },
+ { bmdOutputFrameDisplayedLate, "DELAYED" },
+ { bmdOutputFrameDropped, "DROPPED" },
+ { bmdOutputFrameFlushed, "FLUSHED" }
+ };
+
+ if ((result == bmdOutputFrameCompleted || result == bmdOutputFrameDisplayedLate) && false) {
+ fprintf(stderr, "now=%ld / %.2f: frame with pts=%ld (%ld ago, %d delay) / %.2f was %s at time %ld (%ld ago)\n",
+ stream_frame_time, PTSToTime(stream_frame_time),
+ frame->pts, stream_frame_time - frame->pts, frame_delay, PTSToTime(frame->pts),
+ status[result].c_str(),
+ played_at_time, hardwareTime - played_at_time);
+ } else if (result == bmdOutputFrameDisplayedLate) {
+ fprintf(stderr, "now=%ld / %.2f: frame with pts=%ld (%ld ago, %d delay) / %.2f was %s to %.2f\n",
+ stream_frame_time, PTSToTime(stream_frame_time),
+ frame->pts, stream_frame_time - frame->pts, frame_delay, PTSToTime(frame->pts),
+ status[result].c_str(), PTSToTime(frame->pts) + frame_delay);
+ } else {
+ fprintf(stderr, "now=%ld / %.2f: frame with pts=%ld (%ld ago, %d delay) / %.2f was %s\n",
+ stream_frame_time, PTSToTime(stream_frame_time),
+ frame->pts, stream_frame_time - frame->pts, frame_delay, PTSToTime(frame->pts),
+ status[result].c_str());
+ }
+ if (frame_delay < 0) {
+ fprintf(stderr, "ERROR: Frame went backwards in time (scheduled to start at pts=%ld, ended at or before pts=%ld), something is strange.\n",
+ frame->pts, stream_frame_time);
+ frame_delay = 0;
+ }
+
switch (result) {
case bmdOutputFrameCompleted:
++metric_decklink_output_completed_frames_completed;
+ if (frame_delay != 0) {
+ fprintf(stderr, "ERROR: Frame was reportedly completed without delay, but was delayed nevertheless.\n");
+ // Our callback _might_ be delayed 1+ frame for other reasons,
+ // so ignore this. It's a pity GetFrameCompletionReferenceTimestamp()
+ // cannot give us a timestamp on the same time scale as
+ // GetScheduledStreamTime(); it would be more robust.
+ frame_delay = 0;
+ }
break;
case bmdOutputFrameDisplayedLate:
- fprintf(stderr, "Output frame displayed late (pts=%" PRId64 ")\n", frame->pts);
- fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
+ // fprintf(stderr, "Output frame displayed late (pts=%" PRId64 ")\n", frame->pts);
+ //fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
++metric_decklink_output_completed_frames_late;
break;
case bmdOutputFrameDropped:
- fprintf(stderr, "Output frame was dropped (pts=%" PRId64 ")\n", frame->pts);
- fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
+ // fprintf(stderr, "Output frame was dropped (pts=%" PRId64 ")\n", frame->pts);
+ //fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
++metric_decklink_output_completed_frames_dropped;
break;
case bmdOutputFrameFlushed:
- fprintf(stderr, "Output frame was flushed (pts=%" PRId64 ")\n", frame->pts);
+ // fprintf(stderr, "Output frame was flushed (pts=%" PRId64 ")\n", frame->pts);
++metric_decklink_output_completed_frames_flushed;
break;
default:
{
lock_guard<mutex> lock(frame_queue_mutex);
frame_freelist.push(unique_ptr<Frame>(frame));
- assert(scheduled_frames.front() == frame);
- scheduled_frames.pop_front();
+
+ // Dropped frames can come out-of-order, so we can't just look at the front;
+ // we need to go and find it in the list.
+ auto it = find(scheduled_frames.begin(), scheduled_frames.end(), frame);
+ assert(it != scheduled_frames.end());
+ scheduled_frames.erase(it);
--metric_decklink_output_inflight_frames;
+
+ if (frame_delay > 0 && result == bmdOutputFrameDisplayedLate) {
+ // All frames that were queued earlier will be delayed,
+ // so update so that we don't double-count the delay.
+ int64_t prev_frame_pts = frame->pts + frame_delay * frame_duration;
+ for (Frame *other_frame : scheduled_frames) {
+ int64_t old_pts = other_frame->pts;
+ other_frame->pts = std::max(other_frame->pts, prev_frame_pts + frame_duration);
+ fprintf(stderr, " - moving frame from pts=%ld (%.3f) to pts=%ld (%.3f)\n",
+ old_pts, PTSToTime(old_pts), other_frame->pts, PTSToTime(other_frame->pts));
+ prev_frame_pts = other_frame->pts;
+ }
+
+ int64_t earliest_next_frame = (stream_frame_time + frame_duration - 1) / frame_duration * frame_duration;
+ earliest_next_frame = std::max(earliest_next_frame, prev_frame_pts + frame_duration);
+ if (next_output_pts < earliest_next_frame) {
+ // In effect, duplicate a frame. FIXME write something about this
+ // FIXME is this really right now? but perhaps we're forced
+ // and it messes up the queue length calculation temporarily, we need something else there
+ //fprintf(stderr, "Duplicating frame %d times due to starvation!\n", frame_delay);
+
+ // FIXME this causes us to believe in output jitter?
+ fprintf(stderr, " - moving output pointer from pts=%ld (%.3f) to pts=%ld (%.3f)\n",
+ next_output_pts, PTSToTime(next_output_pts), earliest_next_frame, PTSToTime(earliest_next_frame));
+ next_output_pts = earliest_next_frame;
+ // FIXME metric
+ }
+ }
+
+ if (result == bmdOutputFrameCompleted || result == bmdOutputFrameDisplayedLate) {
+ //output_jitter_history.frame_arrived(now, frame_duration, /*dropped_frames=*/frame_delay, true);
+ // TODO: backdate now, and possibly also get_expected_next_frame()?
+ queue_length_policy.update_policy(
+ now,
+ input_jitter_history.get_expected_next_frame(),
+ frame->duration, frame_duration,
+ input_jitter_history.estimate_max_jitter(),
+ // output_jitter_history.estimate_max_jitter(), true);
+ 0.0, true);
+ num_safe_frames = queue_length_policy.get_safe_queue_length();
+ }
+ fprintf(stderr, "%zu frames in flight, safe queue length = %u (starv=%d)\n", scheduled_frames.size(), queue_length_policy.get_safe_queue_length(), frame_delay);
}
return S_OK;
}
frame = move(pending_video_frames.front());
pending_video_frames.pop();
+
+ if (scheduled_frames.size() > num_safe_frames) { // FIXME check off-by-one here
+ fprintf(stderr, "Dropping frame to keep latency down!\n");
+ // FIXME metric
+ continue;
+ }
+
+ // Overwrite the pts given by the client; it doesn't own our clock.
+ // TODO: Write something about what semi-unsynchronized really means.
+ frame->pts = next_output_pts;
+ next_output_pts += frame_duration;
}
for ( ;; ) {
}
}
+double DeckLinkOutput::PTSToTime(int64_t pts)
+{
+ return double(pts) / frame_duration;
+}
+
HRESULT STDMETHODCALLTYPE DeckLinkOutput::QueryInterface(REFIID, LPVOID *)
{
return E_NOINTERFACE;
projects / nageru / blobdiff