constexpr double output_framerate = 60000.0 / 1001.0; // FIXME: make configurable
int64_t pts = 0;
+ Clip next_clip;
+ bool got_next_clip = false;
+ double next_clip_fade_time = -1.0;
for ( ;; ) {
// Wait until we're supposed to play something.
clip = current_clip;
stream_idx = current_stream_idx;
}
+got_clip:
steady_clock::time_point origin = steady_clock::now();
int64_t in_pts_origin = clip.pts_in;
int64_t out_pts_origin = pts;
// TODO: Lock to a rational multiple of the frame rate if possible.
double speed = 0.5;
- bool aborted = false;
for (int frameno = 0; ; ++frameno) { // Ends when the clip ends.
double out_pts = out_pts_origin + TIMEBASE * frameno / output_framerate;
steady_clock::time_point next_frame_start =
int64_t in_pts = lrint(in_pts_origin + TIMEBASE * frameno * speed / output_framerate);
pts = lrint(out_pts);
- int64_t in_pts_lower, in_pts_upper;
+ steady_clock::duration time_behind = steady_clock::now() - next_frame_start;
+ if (time_behind >= milliseconds(200)) {
+ fprintf(stderr, "WARNING: %ld ms behind, dropping a frame (no matter the type).\n",
+ lrint(1e3 * duration<double>(time_behind).count()));
+ continue;
+ }
- // Find the frame immediately before and after this point.
- {
- lock_guard<mutex> lock(frame_mu);
+ double time_left_this_clip = double(clip.pts_out - in_pts) / TIMEBASE / speed;
+ if (!got_next_clip && next_clip_callback != nullptr && time_left_this_clip <= clip.fade_time_seconds) {
+ // Find the next clip so that we can begin a fade.
+ next_clip = next_clip_callback();
+ if (next_clip.pts_in != -1) {
+ got_next_clip = true;
- // Find the first frame such that in_pts >= frame.pts.
- auto it = lower_bound(frames[stream_idx].begin(),
- frames[stream_idx].end(),
- in_pts);
- if (it == frames[stream_idx].end() || *it >= clip.pts_out) {
- break;
+ double duration_next_clip = (next_clip.pts_out - next_clip.pts_in) / TIMEBASE / speed;
+ next_clip_fade_time = std::min(time_left_this_clip, duration_next_clip);
+ fprintf(stderr, "decided on %.3f seconds fade time [%f %f]\n", next_clip_fade_time, time_left_this_clip, duration_next_clip);
}
- in_pts_upper = *it;
+ }
- // Find the last frame such that in_pts <= frame.pts (if any).
- if (it == frames[stream_idx].begin()) {
- in_pts_lower = *it;
- } else {
- in_pts_lower = *(it - 1);
+ // TODO: If more than half-way through the fade, interpolate the next clip
+ // instead of the current one.
+
+ int secondary_stream_idx = -1;
+ int64_t secondary_pts = -1;
+ float fade_alpha = 0.0f;
+ if (got_next_clip) {
+ int64_t in_pts_lower, in_pts_upper;
+ bool ok = find_surrounding_frames(in_pts, next_clip.stream_idx, &in_pts_lower, &in_pts_upper);
+ if (ok) {
+ secondary_stream_idx = next_clip.stream_idx;
+ secondary_pts = in_pts_lower;
+ fade_alpha = 1.0f - time_left_this_clip / next_clip_fade_time;
}
}
- assert(in_pts >= in_pts_lower);
- assert(in_pts <= in_pts_upper);
+
+ if (progress_callback != nullptr) {
+ // NOTE: None of this will take into account any snapping done below.
+ double played_this_clip = double(in_pts - clip.pts_in) / TIMEBASE / speed;
+ double total_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / speed;
+ progress_callback(played_this_clip, total_length);
+ }
+
+ int64_t in_pts_lower, in_pts_upper;
+ bool ok = find_surrounding_frames(in_pts, stream_idx, &in_pts_lower, &in_pts_upper);
+ if (!ok || in_pts_upper >= clip.pts_out) {
+ break;
+ }
// Sleep until the next frame start, or until there's a new clip we're supposed to play.
{
}
if (in_pts_lower == in_pts_upper) {
- destination->setFrame(stream_idx, in_pts_lower);
+ destination->setFrame(stream_idx, in_pts_lower, /*interpolated=*/false, secondary_stream_idx, secondary_pts, fade_alpha);
if (video_stream != nullptr) {
- video_stream->schedule_original_frame(lrint(out_pts), stream_idx, in_pts_lower);
+ if (secondary_stream_idx == -1) {
+ video_stream->schedule_original_frame(pts, stream_idx, in_pts_lower);
+ } else {
+ video_stream->schedule_faded_frame(pts, stream_idx, in_pts_lower, secondary_stream_idx, secondary_pts, fade_alpha);
+ }
}
continue;
}
// Snap to input frame: If we can do so with less than 1% jitter
// (ie., move less than 1% of an _output_ frame), do so.
- double in_pts_lower_as_frameno = (in_pts_lower - in_pts_origin) * output_framerate / TIMEBASE / speed;
- double in_pts_upper_as_frameno = (in_pts_upper - in_pts_origin) * output_framerate / TIMEBASE / speed;
- if (fabs(in_pts_lower_as_frameno - frameno) < 0.01) {
- destination->setFrame(stream_idx, in_pts_lower);
- if (video_stream != nullptr) {
- video_stream->schedule_original_frame(lrint(out_pts), stream_idx, in_pts_lower);
+ bool snapped = false;
+ for (int64_t snap_pts : { in_pts_lower, in_pts_upper }) {
+ double snap_pts_as_frameno = (snap_pts - in_pts_origin) * output_framerate / TIMEBASE / speed;
+ if (fabs(snap_pts_as_frameno - frameno) < 0.01) {
+ destination->setFrame(stream_idx, snap_pts, /*interpolated=*/false, secondary_stream_idx, secondary_pts, fade_alpha);
+ if (video_stream != nullptr) {
+ if (secondary_stream_idx == -1) {
+ video_stream->schedule_original_frame(pts, stream_idx, snap_pts);
+ } else {
+ video_stream->schedule_faded_frame(pts, stream_idx, snap_pts, secondary_stream_idx, secondary_pts, fade_alpha);
+ }
+ }
+ in_pts_origin += snap_pts - in_pts;
+ snapped = true;
+ break;
}
- in_pts_origin += in_pts_lower - in_pts;
+ }
+ if (snapped) {
continue;
- } else if (fabs(in_pts_upper_as_frameno - frameno) < 0.01) {
- destination->setFrame(stream_idx, in_pts_upper);
- if (video_stream != nullptr) {
- video_stream->schedule_original_frame(lrint(out_pts), stream_idx, in_pts_upper);
- }
- in_pts_origin += in_pts_upper - in_pts;
+ }
+
+ if (time_behind >= milliseconds(100)) {
+ fprintf(stderr, "WARNING: %ld ms behind, dropping an interpolated frame.\n",
+ lrint(1e3 * duration<double>(time_behind).count()));
continue;
}
double alpha = double(in_pts - in_pts_lower) / (in_pts_upper - in_pts_lower);
- destination->setFrame(stream_idx, in_pts_lower); // FIXME
- if (video_stream != nullptr) {
- // Send the frame to the stream.
- video_stream->schedule_interpolated_frame(lrint(out_pts), stream_idx, in_pts_lower, in_pts_upper, alpha);
+ if (video_stream == nullptr) {
+ // Previews don't do any interpolation.
+ assert(secondary_stream_idx == -1);
+ destination->setFrame(stream_idx, in_pts_lower, /*interpolated=*/false, fade_alpha);
+ } else {
+ // Calculate the interpolated frame. When it's done, the destination
+ // will be unblocked.
+ destination->setFrame(stream_idx, pts, /*interpolated=*/true, secondary_stream_idx, secondary_pts, fade_alpha);
+ video_stream->schedule_interpolated_frame(pts, stream_idx, in_pts_lower, in_pts_upper, alpha, secondary_stream_idx, secondary_pts, fade_alpha);
+ }
+ }
+
+ // The clip ended.
+
+ // Last-ditch effort to get the next clip (if e.g. the fade time was zero seconds).
+ if (!got_next_clip && next_clip_callback != nullptr) {
+ next_clip = next_clip_callback();
+ if (next_clip.pts_in != -1) {
+ got_next_clip = true;
}
}
+ // Switch to next clip if we got it.
+ if (got_next_clip) {
+ clip = next_clip;
+ stream_idx = next_clip.stream_idx; // Override is used for previews only, and next_clip is used for live ony.
+ if (done_callback != nullptr) {
+ done_callback();
+ }
+ got_next_clip = false;
+ goto got_clip;
+ }
+
{
unique_lock<mutex> lock(queue_state_mu);
playing = false;
}
- if (done_callback != nullptr && !aborted) {
+ if (done_callback != nullptr) {
done_callback();
}
}
}
+// Find the frame immediately before and after this point.
+bool Player::find_surrounding_frames(int64_t pts, int stream_idx, int64_t *pts_lower, int64_t *pts_upper)
+{
+ lock_guard<mutex> lock(frame_mu);
+
+ // Find the first frame such that frame.pts >= pts.
+ auto it = lower_bound(frames[stream_idx].begin(),
+ frames[stream_idx].end(),
+ pts);
+ if (it == frames[stream_idx].end()) {
+ return false;
+ }
+ *pts_upper = *it;
+
+ // Find the last frame such that in_pts <= frame.pts (if any).
+ if (it == frames[stream_idx].begin()) {
+ *pts_lower = *it;
+ } else {
+ *pts_lower = *(it - 1);
+ }
+ assert(pts >= *pts_lower);
+ assert(pts <= *pts_upper);
+ return true;
+}
+
Player::Player(JPEGFrameView *destination, bool also_output_to_stream)
: destination(destination)
{
if (it == frames[stream_idx].end()) {
return;
}
- destination->setFrame(stream_idx, *it);
+ destination->setFrame(stream_idx, *it, /*interpolated=*/false);
}
projects / nageru / blobdiff