6 #include "frame_on_disk.h"
7 #include "jpeg_frame_view.h"
8 #include "shared/context.h"
9 #include "shared/ffmpeg_raii.h"
10 #include "shared/httpd.h"
11 #include "shared/metrics.h"
12 #include "shared/mux.h"
13 #include "shared/timebase.h"
14 #include "video_stream.h"
18 #include <condition_variable>
19 #include <movit/util.h>
26 using namespace std::chrono;
28 extern HTTPD *global_httpd;
30 void Player::thread_func(AVFormatContext *file_avctx)
32 pthread_setname_np(pthread_self(), "Player");
34 QSurface *surface = create_surface();
35 QOpenGLContext *context = create_context(surface);
36 if (!make_current(context, surface)) {
43 // Create the VideoStream object, now that we have an OpenGL context.
44 if (stream_output != NO_STREAM_OUTPUT) {
45 video_stream.reset(new VideoStream(file_avctx));
46 video_stream->start();
51 while (!should_quit) {
58 double calc_progress(const Clip &clip, int64_t pts)
60 return double(pts - clip.pts_in) / (clip.pts_out - clip.pts_in);
63 void do_splice(const vector<ClipWithID> &new_list, size_t playing_index1, ssize_t playing_index2, vector<ClipWithID> *old_list)
65 assert(playing_index2 == -1 || size_t(playing_index2) == playing_index1 + 1);
67 // First see if we can do the simple thing; find an element in the new
68 // list that we are already playing, which will serve as our splice point.
69 int splice_start_new_list = -1;
70 for (size_t clip_idx = 0; clip_idx < new_list.size(); ++clip_idx) {
71 if (new_list[clip_idx].id == (*old_list)[playing_index1].id) {
72 splice_start_new_list = clip_idx + 1;
73 } else if (playing_index2 != -1 && new_list[clip_idx].id == (*old_list)[playing_index2].id) {
74 splice_start_new_list = clip_idx + 1;
77 if (splice_start_new_list == -1) {
78 // OK, so the playing items are no longer in the new list. Most likely,
79 // that means we deleted some range that included them. But the ones
80 // before should stay put -- and we don't want to play them. So find
81 // the ones that we've already played, and ignore them. Hopefully,
82 // they're contiguous; the last one that's not seen will be our cut point.
84 // Keeping track of the playlist range explicitly in the UI would remove
85 // the need for these heuristics, but it would probably also mean we'd
86 // have to lock the playing clip, which sounds annoying.
87 unordered_map<uint64_t, size_t> played_ids;
88 for (size_t clip_idx = 0; clip_idx < playing_index1; ++old_list) {
89 played_ids.emplace((*old_list)[clip_idx].id, clip_idx);
91 for (size_t clip_idx = 0; clip_idx < new_list.size(); ++clip_idx) {
92 if (played_ids.count(new_list[clip_idx].id)) {
93 splice_start_new_list = clip_idx + 1;
97 if (splice_start_new_list == -1) {
98 // OK, we didn't find any matches; the lists are totally distinct.
99 // So probably the entire thing was deleted; leave it alone.
104 size_t splice_start_old_list = ((playing_index2 == -1) ? playing_index1 : playing_index2) + 1;
105 old_list->erase(old_list->begin() + splice_start_old_list, old_list->end());
106 old_list->insert(old_list->end(), new_list.begin() + splice_start_new_list, new_list.end());
109 // Keeps track of the various timelines (wall clock time, output pts,
110 // position in the clip we are playing). Generally we keep an origin
111 // and assume we increase linearly from there; the intention is to
112 // avoid getting compounded accuracy errors, although with double,
113 // that is perhaps overkill. (Whenever we break the linear assumption,
114 // we need to reset said origin.)
115 class TimelineTracker
119 steady_clock::time_point wallclock_time;
125 TimelineTracker(double master_speed, int64_t out_pts_origin)
126 : master_speed(master_speed), last_out_pts(out_pts_origin) {
127 origin.out_pts = out_pts_origin;
128 master_speed_ease_target = master_speed; // Keeps GCC happy.
131 void new_clip(steady_clock::time_point wallclock_origin, const Clip *clip, int64_t start_pts_offset)
134 origin.wallclock_time = wallclock_origin;
135 origin.in_pts = clip->pts_in + start_pts_offset;
136 origin.out_pts = last_out_pts;
140 // Returns the current time for said frame.
141 Instant advance_to_frame(int64_t frameno);
143 int64_t get_in_pts_origin() const { return origin.in_pts; }
144 bool playing_at_normal_speed() const {
145 if (in_easing) return false;
147 const double effective_speed = clip->speed * master_speed;
148 return effective_speed >= 0.999 && effective_speed <= 1.001;
151 void snap_by(int64_t offset) {
152 origin.in_pts += offset;
155 void change_master_speed(double new_master_speed, Instant now);
157 // Instead of changing the speed instantly, change it over the course of
158 // about 200 ms. This is a simple linear ramp; I tried various forms of
159 // Bézier curves for more elegant/dramatic changing, but it seemed linear
160 // looked just as good in practical video.
161 void start_easing(double new_master_speed, Instant now);
164 // Find out how far we are into the easing curve (0..1).
165 // We use this to adjust the input pts.
166 double find_ease_t(double out_pts) const;
167 double easing_out_pts_adjustment(double out_pts) const;
170 const Clip *clip = nullptr;
172 int64_t last_out_pts;
174 // If easing between new and old master speeds.
175 bool in_easing = false;
176 int64_t ease_started_pts = 0;
177 double master_speed_ease_target;
178 static constexpr int64_t ease_length_out_pts = TIMEBASE / 5; // 200 ms.
181 TimelineTracker::Instant TimelineTracker::advance_to_frame(int64_t frameno)
184 double in_pts_double = origin.in_pts + TIMEBASE * clip->speed * (frameno - origin.frameno) * master_speed / global_flags.output_framerate;
185 double out_pts_double = origin.out_pts + TIMEBASE * (frameno - origin.frameno) / global_flags.output_framerate;
188 double in_pts_adjustment = easing_out_pts_adjustment(out_pts_double) * clip->speed;
189 in_pts_double += in_pts_adjustment;
192 ret.in_pts = lrint(in_pts_double);
193 ret.out_pts = lrint(out_pts_double);
194 ret.wallclock_time = origin.wallclock_time + microseconds(lrint((out_pts_double - origin.out_pts) * 1e6 / TIMEBASE));
195 ret.frameno = frameno;
197 last_out_pts = ret.out_pts;
199 if (in_easing && ret.out_pts >= ease_started_pts + ease_length_out_pts) {
200 // We have ended easing. Add what we need for the entire easing period,
201 // then _actually_ change the speed as we go back into normal mode.
202 origin.out_pts += easing_out_pts_adjustment(out_pts_double);
203 change_master_speed(master_speed_ease_target, ret);
210 void TimelineTracker::change_master_speed(double new_master_speed, Instant now)
212 master_speed = new_master_speed;
214 // Reset the origins, since the calculations depend on linear interpolation
215 // based on the master speed.
219 void TimelineTracker::start_easing(double new_master_speed, Instant now)
222 // Apply whatever we managed to complete of the previous easing.
223 origin.out_pts += easing_out_pts_adjustment(now.out_pts);
224 double reached_speed = master_speed + (master_speed_ease_target - master_speed) * find_ease_t(now.out_pts);
225 change_master_speed(reached_speed, now);
228 ease_started_pts = now.out_pts;
229 master_speed_ease_target = new_master_speed;
232 double TimelineTracker::find_ease_t(double out_pts) const
234 return (out_pts - ease_started_pts) / double(ease_length_out_pts);
237 double TimelineTracker::easing_out_pts_adjustment(double out_pts) const
239 double t = find_ease_t(out_pts);
240 double area_factor = (master_speed_ease_target - master_speed) * ease_length_out_pts;
241 double val = 0.5 * min(t, 1.0) * min(t, 1.0) * area_factor;
243 val += area_factor * (t - 1.0);
250 void Player::play_playlist_once()
252 vector<ClipWithID> clip_list;
254 steady_clock::time_point before_sleep = steady_clock::now();
257 // Wait until we're supposed to play something.
259 unique_lock<mutex> lock(queue_state_mu);
261 clip_ready = new_clip_changed.wait_for(lock, milliseconds(100), [this] {
262 return should_quit || new_clip_ready;
268 new_clip_ready = false;
270 clip_list = move(queued_clip_list);
271 queued_clip_list.clear();
272 assert(!clip_list.empty());
273 assert(!splice_ready); // This corner case should have been handled in splice_play().
275 pause_status = this->pause_status;
279 steady_clock::duration time_slept = steady_clock::now() - before_sleep;
280 int64_t slept_pts = duration_cast<duration<size_t, TimebaseRatio>>(time_slept).count();
282 if (video_stream != nullptr) {
283 // Add silence for the time we're waiting.
284 video_stream->schedule_silence(steady_clock::now(), pts, slept_pts, QueueSpotHolder());
290 if (video_stream != nullptr) {
291 ++metric_refresh_frame;
292 string subtitle = "Futatabi " NAGERU_VERSION ";PAUSED;0.000;" + pause_status;
293 video_stream->schedule_refresh_frame(steady_clock::now(), pts, /*display_func=*/nullptr, QueueSpotHolder(),
299 should_skip_to_next = false; // To make sure we don't have a lingering click from before play.
300 steady_clock::time_point origin = steady_clock::now(); // TODO: Add a 100 ms buffer for ramp-up?
301 TimelineTracker timeline(start_master_speed, pts);
302 timeline.new_clip(origin, &clip_list[0].clip, /*pts_offset=*/0);
303 for (size_t clip_idx = 0; clip_idx < clip_list.size(); ++clip_idx) {
304 const Clip *clip = &clip_list[clip_idx].clip;
305 const Clip *next_clip = (clip_idx + 1 < clip_list.size()) ? &clip_list[clip_idx + 1].clip : nullptr;
307 double next_clip_fade_time = -1.0;
308 if (next_clip != nullptr) {
309 double duration_this_clip = double(clip->pts_out - timeline.get_in_pts_origin()) / TIMEBASE / clip->speed;
310 double duration_next_clip = double(next_clip->pts_out - next_clip->pts_in) / TIMEBASE / clip->speed;
311 next_clip_fade_time = min(min(duration_this_clip, duration_next_clip), clip->fade_time_seconds);
314 int stream_idx = clip->stream_idx;
316 // Start playing exactly at a frame.
317 // TODO: Snap secondary (fade-to) clips in the same fashion
318 // so that we don't get jank here).
320 lock_guard<mutex> lock(frame_mu);
322 // Find the first frame such that frame.pts <= in_pts.
323 auto it = find_last_frame_before(frames[stream_idx], timeline.get_in_pts_origin());
324 if (it != frames[stream_idx].end()) {
325 timeline.snap_by(it->pts - timeline.get_in_pts_origin());
329 steady_clock::time_point next_frame_start;
330 for (int64_t frameno = 0; !should_quit; ++frameno) { // Ends when the clip ends.
331 TimelineTracker::Instant instant = timeline.advance_to_frame(frameno);
332 int64_t in_pts = instant.in_pts;
333 pts = instant.out_pts;
334 next_frame_start = instant.wallclock_time;
336 float new_master_speed = change_master_speed.exchange(0.0f / 0.0f);
337 if (!std::isnan(new_master_speed)) {
338 timeline.start_easing(new_master_speed, instant);
341 if (should_skip_to_next.exchange(false)) { // Test and clear.
342 Clip *clip = &clip_list[clip_idx].clip; // Get a non-const pointer.
343 clip->pts_out = std::min<int64_t>(clip->pts_out, llrint(in_pts + clip->fade_time_seconds * clip->speed * TIMEBASE));
346 if (in_pts >= clip->pts_out) {
350 // Only play audio if we're within 0.1% of normal speed. We could do
351 // stretching or pitch shift later if it becomes needed.
352 const bool play_audio = timeline.playing_at_normal_speed();
355 lock_guard<mutex> lock(queue_state_mu);
357 if (next_clip == nullptr) {
358 do_splice(to_splice_clip_list, clip_idx, -1, &clip_list);
360 do_splice(to_splice_clip_list, clip_idx, clip_idx + 1, &clip_list);
362 to_splice_clip_list.clear();
363 splice_ready = false;
365 // Refresh the clip pointer, since the clip list may have been reallocated.
366 clip = &clip_list[clip_idx].clip;
368 // Recompute next_clip and any needed fade times, since the next clip may have changed
369 // (or we may have gone from no new clip to having one, or the other way).
370 next_clip = (clip_idx + 1 < clip_list.size()) ? &clip_list[clip_idx + 1].clip : nullptr;
371 if (next_clip != nullptr) {
372 double duration_this_clip = double(clip->pts_out - timeline.get_in_pts_origin()) / TIMEBASE / clip->speed;
373 double duration_next_clip = double(next_clip->pts_out - next_clip->pts_in) / TIMEBASE / clip->speed;
374 next_clip_fade_time = min(min(duration_this_clip, duration_next_clip), clip->fade_time_seconds);
379 steady_clock::duration time_behind = steady_clock::now() - next_frame_start;
380 metric_player_ahead_seconds.count_event(-duration<double>(time_behind).count());
381 if (stream_output != FILE_STREAM_OUTPUT && time_behind >= milliseconds(200)) {
382 fprintf(stderr, "WARNING: %ld ms behind, dropping a frame (no matter the type).\n",
383 lrint(1e3 * duration<double>(time_behind).count()));
384 ++metric_dropped_unconditional_frame;
388 // pts not affected by the swapping below.
389 int64_t in_pts_for_progress = in_pts, in_pts_secondary_for_progress = -1;
391 int primary_stream_idx = stream_idx;
392 FrameOnDisk secondary_frame;
393 int secondary_stream_idx = -1;
394 float fade_alpha = 0.0f;
395 double time_left_this_clip = double(clip->pts_out - in_pts) / TIMEBASE / clip->speed;
396 if (next_clip != nullptr && time_left_this_clip <= next_clip_fade_time) {
397 // We're in a fade to the next clip->
398 secondary_stream_idx = next_clip->stream_idx;
399 int64_t in_pts_secondary = lrint(next_clip->pts_in + (next_clip_fade_time - time_left_this_clip) * TIMEBASE * clip->speed);
400 in_pts_secondary_for_progress = in_pts_secondary;
401 fade_alpha = 1.0f - time_left_this_clip / next_clip_fade_time;
403 // If more than half-way through the fade, interpolate the next clip
404 // instead of the current one, since it's more visible.
405 if (fade_alpha >= 0.5f) {
406 swap(primary_stream_idx, secondary_stream_idx);
407 swap(in_pts, in_pts_secondary);
408 fade_alpha = 1.0f - fade_alpha;
411 FrameOnDisk frame_lower, frame_upper;
412 bool ok = find_surrounding_frames(in_pts_secondary, secondary_stream_idx, &frame_lower, &frame_upper);
415 secondary_frame = frame_lower;
417 secondary_stream_idx = -1;
421 // NOTE: None of this will take into account any snapping done below.
422 double clip_progress = calc_progress(*clip, in_pts_for_progress);
423 map<uint64_t, double> progress{ { clip_list[clip_idx].id, clip_progress } };
424 TimeRemaining time_remaining;
425 if (next_clip != nullptr && time_left_this_clip <= next_clip_fade_time) {
426 double next_clip_progress = calc_progress(*next_clip, in_pts_secondary_for_progress);
427 progress[clip_list[clip_idx + 1].id] = next_clip_progress;
428 time_remaining = compute_time_left(clip_list, clip_idx + 1, next_clip_progress);
430 time_remaining = compute_time_left(clip_list, clip_idx, clip_progress);
432 if (progress_callback != nullptr) {
433 progress_callback(progress, time_remaining);
436 FrameOnDisk frame_lower, frame_upper;
437 bool ok = find_surrounding_frames(in_pts, primary_stream_idx, &frame_lower, &frame_upper);
442 // Wait until we should, or (given buffering) can, output the frame.
444 unique_lock<mutex> lock(queue_state_mu);
445 if (video_stream == nullptr) {
446 // No queue, just wait until the right time and then show the frame.
447 new_clip_changed.wait_until(lock, next_frame_start, [this] {
448 return should_quit || new_clip_ready || override_stream_idx != -1;
454 // If the queue is full (which is really the state we'd like to be in),
455 // wait until there's room for one more frame (ie., one was output from
456 // VideoStream), or until or until there's a new clip we're supposed to play.
458 // In this case, we don't sleep until next_frame_start; the displaying is
459 // done by the queue.
460 new_clip_changed.wait(lock, [this] {
461 if (num_queued_frames < max_queued_frames) {
464 return should_quit || new_clip_ready || override_stream_idx != -1;
470 if (new_clip_ready) {
471 if (video_stream != nullptr) {
472 lock.unlock(); // Urg.
473 video_stream->clear_queue();
478 // Honor if we got an override request for the camera.
479 if (override_stream_idx != -1) {
480 stream_idx = override_stream_idx;
481 override_stream_idx = -1;
489 ss.imbue(locale("C"));
491 ss << "Futatabi " NAGERU_VERSION ";PLAYING;";
492 ss << fixed << (time_remaining.num_infinite * 86400.0 + time_remaining.t);
493 ss << ";" << format_duration(time_remaining) << " left";
497 // Snap to input frame: If we can do so with less than 1% jitter
498 // (ie., move less than 1% of an _output_ frame), do so.
499 // TODO: Snap secondary (fade-to) clips in the same fashion.
500 double pts_snap_tolerance = 0.01 * double(TIMEBASE) * clip->speed / global_flags.output_framerate;
501 bool snapped = false;
502 for (FrameOnDisk snap_frame : { frame_lower, frame_upper }) {
503 if (fabs(snap_frame.pts - in_pts) < pts_snap_tolerance) {
504 display_single_frame(primary_stream_idx, snap_frame, secondary_stream_idx,
505 secondary_frame, fade_alpha, next_frame_start, /*snapped=*/true,
506 subtitle, play_audio);
507 timeline.snap_by(snap_frame.pts - in_pts);
516 // If there's nothing to interpolate between, or if interpolation is turned off,
517 // or we're a preview, then just display the frame.
518 if (frame_lower.pts == frame_upper.pts || global_flags.interpolation_quality == 0 || video_stream == nullptr) {
519 display_single_frame(primary_stream_idx, frame_lower, secondary_stream_idx,
520 secondary_frame, fade_alpha, next_frame_start, /*snapped=*/false,
521 subtitle, play_audio);
525 // The snapping above makes us lock to the input framerate, even in the presence
526 // of pts drift, for most typical cases where it's needed, like converting 60 → 2x60
527 // or 60 → 2x59.94. However, there are some corner cases like 25 → 2x59.94, where we'd
528 // get a snap very rarely (in the given case, once every 24 output frames), and by
529 // that time, we'd have drifted out. We could have solved this by changing the overall
530 // speed ever so slightly, but it requires that we know the actual frame rate (which
531 // is difficult in the presence of jitter and missed frames), or at least do some kind
532 // of matching/clustering. Instead, we take the opportunity to lock to in-between rational
533 // points if we can. E.g., if we are converting 60 → 2x60, we would not only snap to
534 // an original frame every other frame; we would also snap to exactly alpha=0.5 every
535 // in-between frame. Of course, we will still need to interpolate, but we get a lot
536 // closer when we actually get close to an original frame. In other words: Snap more
537 // often, but snap less each time. Unless the input and output frame rates are completely
538 // decorrelated with no common factor, of course (e.g. 12.345 → 34.567, which we should
539 // really never see in practice).
540 for (double fraction : { 1.0 / 2.0, 1.0 / 3.0, 2.0 / 3.0, 1.0 / 4.0, 3.0 / 4.0,
541 1.0 / 5.0, 2.0 / 5.0, 3.0 / 5.0, 4.0 / 5.0 }) {
542 double subsnap_pts = frame_lower.pts + fraction * (frame_upper.pts - frame_lower.pts);
543 if (fabs(subsnap_pts - in_pts) < pts_snap_tolerance) {
544 timeline.snap_by(lrint(subsnap_pts) - in_pts);
545 in_pts = lrint(subsnap_pts);
550 if (stream_output != FILE_STREAM_OUTPUT && time_behind >= milliseconds(100)) {
551 fprintf(stderr, "WARNING: %ld ms behind, dropping an interpolated frame.\n",
552 lrint(1e3 * duration<double>(time_behind).count()));
553 ++metric_dropped_interpolated_frame;
557 double alpha = double(in_pts - frame_lower.pts) / (frame_upper.pts - frame_lower.pts);
558 auto display_func = [this](shared_ptr<Frame> frame) {
559 if (destination != nullptr) {
560 destination->setFrame(frame);
563 if (secondary_stream_idx == -1) {
564 ++metric_interpolated_frame;
566 ++metric_interpolated_faded_frame;
568 video_stream->schedule_interpolated_frame(
569 next_frame_start, pts, display_func, QueueSpotHolder(this),
570 frame_lower, frame_upper, alpha,
571 secondary_frame, fade_alpha, subtitle, play_audio);
572 last_pts_played = in_pts; // Not really needed; only previews use last_pts_played.
580 // Start the next clip from the point where the fade went out.
581 if (next_clip != nullptr) {
582 timeline.new_clip(next_frame_start, next_clip, /*pts_start_offset=*/lrint(next_clip_fade_time * TIMEBASE * clip->speed));
586 if (done_callback != nullptr) {
591 void Player::display_single_frame(int primary_stream_idx, const FrameOnDisk &primary_frame, int secondary_stream_idx, const FrameOnDisk &secondary_frame, double fade_alpha, steady_clock::time_point frame_start, bool snapped, const std::string &subtitle, bool play_audio)
593 auto display_func = [this, primary_stream_idx, primary_frame, secondary_frame, fade_alpha] {
594 if (destination != nullptr) {
595 destination->setFrame(primary_stream_idx, primary_frame, secondary_frame, fade_alpha);
598 if (video_stream == nullptr) {
601 if (secondary_stream_idx == -1) {
602 // NOTE: We could be increasing unused metrics for previews, but that's harmless.
604 ++metric_original_snapped_frame;
606 ++metric_original_frame;
608 video_stream->schedule_original_frame(
609 frame_start, pts, display_func, QueueSpotHolder(this),
610 primary_frame, subtitle, play_audio);
612 assert(secondary_frame.pts != -1);
613 // NOTE: We could be increasing unused metrics for previews, but that's harmless.
615 ++metric_faded_snapped_frame;
617 ++metric_faded_frame;
619 video_stream->schedule_faded_frame(frame_start, pts, display_func,
620 QueueSpotHolder(this), primary_frame,
621 secondary_frame, fade_alpha, subtitle);
624 last_pts_played = primary_frame.pts;
627 // Find the frame immediately before and after this point.
628 // If we have an exact match, return it immediately.
629 bool Player::find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper)
631 lock_guard<mutex> lock(frame_mu);
633 // Find the first frame such that frame.pts >= pts.
634 auto it = find_last_frame_before(frames[stream_idx], pts);
635 if (it == frames[stream_idx].end()) {
640 // If we have an exact match, return it immediately.
641 if (frame_upper->pts == pts) {
646 // Find the last frame such that in_pts <= frame.pts (if any).
647 if (it == frames[stream_idx].begin()) {
650 *frame_lower = *(it - 1);
652 assert(pts >= frame_lower->pts);
653 assert(pts <= frame_upper->pts);
657 Player::Player(JPEGFrameView *destination, Player::StreamOutput stream_output, AVFormatContext *file_avctx)
658 : destination(destination), stream_output(stream_output)
660 player_thread = thread(&Player::thread_func, this, file_avctx);
662 if (stream_output == HTTPD_STREAM_OUTPUT) {
663 global_metrics.add("http_output_frames", { { "type", "original" }, { "reason", "edge_frame_or_no_interpolation" } }, &metric_original_frame);
664 global_metrics.add("http_output_frames", { { "type", "faded" }, { "reason", "edge_frame_or_no_interpolation" } }, &metric_faded_frame);
665 global_metrics.add("http_output_frames", { { "type", "original" }, { "reason", "snapped" } }, &metric_original_snapped_frame);
666 global_metrics.add("http_output_frames", { { "type", "faded" }, { "reason", "snapped" } }, &metric_faded_snapped_frame);
667 global_metrics.add("http_output_frames", { { "type", "interpolated" } }, &metric_interpolated_frame);
668 global_metrics.add("http_output_frames", { { "type", "interpolated_faded" } }, &metric_interpolated_faded_frame);
669 global_metrics.add("http_output_frames", { { "type", "refresh" } }, &metric_refresh_frame);
670 global_metrics.add("http_dropped_frames", { { "type", "interpolated" } }, &metric_dropped_interpolated_frame);
671 global_metrics.add("http_dropped_frames", { { "type", "unconditional" } }, &metric_dropped_unconditional_frame);
673 vector<double> quantiles{ 0.01, 0.1, 0.25, 0.5, 0.75, 0.9, 0.99 };
674 metric_player_ahead_seconds.init(quantiles, 60.0);
675 global_metrics.add("player_ahead_seconds", &metric_player_ahead_seconds);
682 new_clip_changed.notify_all();
683 player_thread.join();
685 if (video_stream != nullptr) {
686 video_stream->stop();
690 void Player::play(const vector<ClipWithID> &clips)
692 lock_guard<mutex> lock(queue_state_mu);
693 new_clip_ready = true;
694 queued_clip_list = clips;
695 splice_ready = false;
696 override_stream_idx = -1;
697 new_clip_changed.notify_all();
700 void Player::splice_play(const vector<ClipWithID> &clips)
702 lock_guard<mutex> lock(queue_state_mu);
703 if (new_clip_ready) {
704 queued_clip_list = clips;
705 assert(!splice_ready);
710 to_splice_clip_list = clips; // Overwrite any queued but not executed splice.
713 void Player::override_angle(unsigned stream_idx)
717 // Corner case: If a new clip is waiting to be played, change its stream and then we're done.
719 lock_guard<mutex> lock(queue_state_mu);
720 if (new_clip_ready) {
721 assert(queued_clip_list.size() == 1);
722 queued_clip_list[0].clip.stream_idx = stream_idx;
726 // If we are playing a clip, set override_stream_idx, and the player thread will
727 // pick it up and change its internal index.
729 override_stream_idx = stream_idx;
730 new_clip_changed.notify_all();
734 // OK, so we're standing still, presumably at the end of a clip.
735 // Look at the last frame played (if it exists), and show the closest
737 if (last_pts_played < 0) {
740 last_pts = last_pts_played;
743 lock_guard<mutex> lock(frame_mu);
744 auto it = find_first_frame_at_or_after(frames[stream_idx], last_pts);
745 if (it == frames[stream_idx].end()) {
748 destination->setFrame(stream_idx, *it);
751 void Player::take_queue_spot()
753 lock_guard<mutex> lock(queue_state_mu);
757 void Player::release_queue_spot()
759 lock_guard<mutex> lock(queue_state_mu);
760 assert(num_queued_frames > 0);
762 new_clip_changed.notify_all();
765 TimeRemaining compute_time_left(const vector<ClipWithID> &clips, size_t currently_playing_idx, double progress_currently_playing)
767 // Look at the last clip and then start counting from there.
768 TimeRemaining remaining { 0, 0.0 };
769 double last_fade_time_seconds = 0.0;
770 for (size_t row = currently_playing_idx; row < clips.size(); ++row) {
771 const Clip &clip = clips[row].clip;
772 double clip_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / clip.speed;
773 if (clip_length >= 86400.0 || clip.pts_out == -1) { // More than one day.
774 ++remaining.num_infinite;
776 if (row == currently_playing_idx) {
777 // A clip we're playing: Subtract the part we've already played.
778 remaining.t = clip_length * (1.0 - progress_currently_playing);
780 // A clip we haven't played yet: Subtract the part that's overlapping
781 // with a previous clip (due to fade).
782 remaining.t += max(clip_length - last_fade_time_seconds, 0.0);
785 last_fade_time_seconds = min(clip_length, clip.fade_time_seconds);
790 string format_duration(TimeRemaining t)
792 int t_ms = lrint(t.t * 1e3);
794 int ms = t_ms % 1000;
801 if (t.num_infinite > 1 && t.t > 0.0) {
802 snprintf(buf, sizeof(buf), "%zu clips + %d:%02d.%03d", t.num_infinite, m, s, ms);
803 } else if (t.num_infinite > 1) {
804 snprintf(buf, sizeof(buf), "%zu clips", t.num_infinite);
805 } else if (t.num_infinite == 1 && t.t > 0.0) {
806 snprintf(buf, sizeof(buf), "%zu clip + %d:%02d.%03d", t.num_infinite, m, s, ms);
807 } else if (t.num_infinite == 1) {
808 snprintf(buf, sizeof(buf), "%zu clip", t.num_infinite);
810 snprintf(buf, sizeof(buf), "%d:%02d.%03d", m, s, ms);