X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=player.cpp;h=b0e862dd89e2b74a7ad6b46524399228f3cca076;hb=3795723be95f2fe82f3c8b8b45b1a905b2c811fd;hp=6e45f39cd3fc5cc2aaa6ac5b4770ef09b5ac5085;hpb=d357bff359e00a9ad8e5a1d7ec70d0653db46398;p=nageru diff --git a/player.cpp b/player.cpp index 6e45f39..b0e862d 100644 --- a/player.cpp +++ b/player.cpp @@ -1,97 +1,451 @@ +#include "player.h" + +#include "clip_list.h" +#include "context.h" +#include "defs.h" +#include "ffmpeg_raii.h" +#include "frame_on_disk.h" +#include "httpd.h" +#include "jpeg_frame_view.h" +#include "mux.h" +#include "timebase.h" +#include "video_stream.h" + #include #include #include +#include #include +#include #include #include -#include "clip_list.h" -#include "defs.h" -#include "jpeg_frame_view.h" -#include "player.h" - using namespace std; using namespace std::chrono; -extern mutex frame_mu; -extern vector frames[MAX_STREAMS]; +extern HTTPD *global_httpd; -void Player::thread_func() +void Player::thread_func(bool also_output_to_stream) { + pthread_setname_np(pthread_self(), "Player"); + + QSurface *surface = create_surface(); + QOpenGLContext *context = create_context(surface); + if (!make_current(context, surface)) { + printf("oops\n"); + exit(1); + } + + check_error(); + + // Create the VideoStream object, now that we have an OpenGL context. + if (also_output_to_stream) { + video_stream.reset(new VideoStream); + video_stream->start(); + } + + check_error(); + + constexpr double output_framerate = 60000.0 / 1001.0; // FIXME: make configurable + int64_t pts = 0; + Clip next_clip; + size_t next_clip_idx = size_t(-1); + bool got_next_clip = false; + double next_clip_fade_time = -1.0; + for ( ;; ) { +wait_for_clip: + bool clip_ready; + steady_clock::time_point before_sleep = steady_clock::now(); + // Wait until we're supposed to play something. { - unique_lock lock(cue_state_mu); - cue_is_playing.wait(lock, [this]{ - return cue_state == PLAYING; - //return current_cue_status.origin != steady_clock::time_point::max(); + unique_lock lock(queue_state_mu); + clip_ready = new_clip_changed.wait_for(lock, milliseconds(100), [this] { + return new_clip_ready && current_clip.pts_in != -1; }); + new_clip_ready = false; + playing = true; + } + + steady_clock::duration time_slept = steady_clock::now() - before_sleep; + pts += duration_cast>(time_slept).count(); + + if (!clip_ready) { + if (video_stream != nullptr) { + video_stream->schedule_refresh_frame(steady_clock::now(), pts, /*display_func=*/nullptr, QueueSpotHolder()); + } + continue; } Clip clip; + size_t clip_idx; unsigned stream_idx; { - lock_guard lock2(mu); + lock_guard lock(mu); clip = current_clip; + clip_idx = current_clip_idx; stream_idx = current_stream_idx; } - steady_clock::time_point origin = steady_clock::now(); - int64_t pts_origin = clip.pts_in; + steady_clock::time_point origin = steady_clock::now(); // TODO: Add a 100 ms buffer for ramp-up? + int64_t in_pts_origin = clip.pts_in; +got_clip: + int64_t out_pts_origin = pts; + + // Start playing exactly at a frame. + // TODO: Snap secondary (fade-to) clips in the same fashion + // so that we don't get jank here). + { + lock_guard lock(frame_mu); + + // Find the first frame such that frame.pts <= in_pts. + auto it = lower_bound(frames[stream_idx].begin(), + frames[stream_idx].end(), + in_pts_origin, + [](const FrameOnDisk &frame, int64_t pts) { return frame.pts < pts; }); + if (it != frames[stream_idx].end()) { + in_pts_origin = it->pts; + } + } - int64_t next_pts = pts_origin; + // TODO: Lock to a rational multiple of the frame rate if possible. + double speed = 0.5; - bool eof = false; - while (!eof) { // TODO: check for abort - // FIXME: assumes a given timebase. - double speed = 0.5; + int64_t in_pts_start_next_clip = -1; + 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 = - origin + microseconds((next_pts - pts_origin) * int(1000000 / speed) / 12800); - this_thread::sleep_until(next_frame_start); - destination->setFrame(stream_idx, next_pts); + origin + microseconds(lrint((out_pts - out_pts_origin) * 1e6 / TIMEBASE)); + int64_t in_pts = lrint(in_pts_origin + TIMEBASE * frameno * speed / output_framerate); + pts = lrint(out_pts); + + if (in_pts >= clip.pts_out) { + break; + } + + 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(time_behind).count())); + continue; + } + + 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. + tie(next_clip, next_clip_idx) = next_clip_callback(); + if (next_clip.pts_in != -1) { + got_next_clip = true; + + 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); + in_pts_start_next_clip = next_clip.pts_in + lrint(next_clip_fade_time * TIMEBASE * speed); + } + } + + // pts not affected by the swapping below. + int64_t in_pts_for_progress = in_pts, in_pts_secondary_for_progress = -1; + + int primary_stream_idx = stream_idx; + FrameOnDisk secondary_frame; + int secondary_stream_idx = -1; + float fade_alpha = 0.0f; + if (got_next_clip && time_left_this_clip <= next_clip_fade_time) { + secondary_stream_idx = next_clip.stream_idx; + int64_t in_pts_secondary = lrint(next_clip.pts_in + (next_clip_fade_time - time_left_this_clip) * TIMEBASE * speed); + in_pts_secondary_for_progress = in_pts_secondary; + fade_alpha = 1.0f - time_left_this_clip / next_clip_fade_time; + + // If more than half-way through the fade, interpolate the next clip + // instead of the current one, since it's more visible. + if (fade_alpha >= 0.5f) { + swap(primary_stream_idx, secondary_stream_idx); + swap(in_pts, in_pts_secondary); + fade_alpha = 1.0f - fade_alpha; + } + + FrameOnDisk frame_lower, frame_upper; + bool ok = find_surrounding_frames(in_pts_secondary, secondary_stream_idx, &frame_lower, &frame_upper); + if (ok) { + secondary_frame = frame_lower; + } + } + + if (progress_callback != nullptr) { + // NOTE: None of this will take into account any snapping done below. + double played_this_clip = double(in_pts_for_progress - clip.pts_in) / TIMEBASE / speed; + double total_length = double(clip.pts_out - clip.pts_in) / TIMEBASE / speed; + map progress{{ clip_idx, played_this_clip / total_length }}; + + if (got_next_clip && time_left_this_clip <= next_clip_fade_time) { + double played_next_clip = double(in_pts_secondary_for_progress - next_clip.pts_in) / TIMEBASE / speed; + double total_next_length = double(next_clip.pts_out - next_clip.pts_in) / TIMEBASE / speed; + progress[next_clip_idx] = played_next_clip / total_next_length; + } + progress_callback(progress); + } + + FrameOnDisk frame_lower, frame_upper; + bool ok = find_surrounding_frames(in_pts, primary_stream_idx, &frame_lower, &frame_upper); + if (!ok) { + break; + } - // Find the next frame. { - lock_guard lock2(frame_mu); - auto it = upper_bound(frames[stream_idx].begin(), - frames[stream_idx].end(), - next_pts); - if (it == frames[stream_idx].end()) { - eof = true; + unique_lock lock(queue_state_mu); + if (video_stream == nullptr) { + // No queue, just wait until the right time and then show the frame. + new_clip_changed.wait_until(lock, next_frame_start, [this]{ + return new_clip_ready || override_stream_idx != -1; + }); + } else { + // If the queue is full (which is really the state we'd like to be in), + // wait until there's room for one more frame (ie., one was output from + // VideoStream), or until or until there's a new clip we're supposed to play. + // + // In this case, we don't sleep until next_frame_start; the displaying is + // done by the queue. + new_clip_changed.wait(lock, [this]{ + if (num_queued_frames < max_queued_frames) { + return true; + } + return new_clip_ready || override_stream_idx != -1; + }); + } + if (new_clip_ready) { + if (video_stream != nullptr) { + lock.unlock(); // Urg. + video_stream->clear_queue(); + lock.lock(); + } + got_next_clip = false; + goto wait_for_clip; + } + if (override_stream_idx != -1) { + stream_idx = override_stream_idx; + override_stream_idx = -1; + continue; + } + } + + if (frame_lower.pts == frame_upper.pts) { + auto display_func = [this, primary_stream_idx, frame_lower, secondary_frame, fade_alpha]{ + destination->setFrame(primary_stream_idx, frame_lower, secondary_frame, fade_alpha); + }; + if (video_stream == nullptr) { + display_func(); } else { - next_pts = *it; - if (next_pts >= clip.pts_out) { - eof = true; + if (secondary_stream_idx == -1) { + video_stream->schedule_original_frame( + next_frame_start, pts, display_func, QueueSpotHolder(this), + frame_lower); + } else { + assert(secondary_frame.pts != -1); + video_stream->schedule_faded_frame(next_frame_start, pts, display_func, + QueueSpotHolder(this), frame_lower, + secondary_frame, 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. + // TODO: Snap secondary (fade-to) clips in the same fashion. + bool snapped = false; + for (int64_t snap_pts : { frame_lower.pts, frame_upper.pts }) { + double snap_pts_as_frameno = (snap_pts - in_pts_origin) * output_framerate / TIMEBASE / speed; + if (fabs(snap_pts_as_frameno - frameno) < 0.01) { + FrameOnDisk snap_frame = frame_lower; + snap_frame.pts = snap_pts; + auto display_func = [this, primary_stream_idx, snap_frame, secondary_frame, fade_alpha]{ + destination->setFrame(primary_stream_idx, snap_frame, secondary_frame, fade_alpha); + }; + if (video_stream == nullptr) { + display_func(); + } else { + if (secondary_stream_idx == -1) { + video_stream->schedule_original_frame( + next_frame_start, pts, display_func, + QueueSpotHolder(this), snap_frame); + } else { + assert(secondary_frame.pts != -1); + video_stream->schedule_faded_frame( + next_frame_start, pts, display_func, QueueSpotHolder(this), + snap_frame, secondary_frame, fade_alpha); + } } + in_pts_origin += snap_pts - in_pts; + snapped = true; + break; } } - if (eof) break; + if (snapped) { + continue; + } + + if (time_behind >= milliseconds(100)) { + fprintf(stderr, "WARNING: %ld ms behind, dropping an interpolated frame.\n", + lrint(1e3 * duration(time_behind).count())); + continue; + } + + double alpha = double(in_pts - frame_lower.pts) / (frame_upper.pts - frame_lower.pts); + + if (video_stream == nullptr) { + // Previews don't do any interpolation. + assert(secondary_stream_idx == -1); + destination->setFrame(primary_stream_idx, frame_lower); + } else { + auto display_func = [this](shared_ptr frame) { + destination->setFrame(frame); + }; + video_stream->schedule_interpolated_frame( + next_frame_start, pts, display_func, QueueSpotHolder(this), + frame_lower, frame_upper, alpha, + secondary_frame, 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) { + tie(next_clip, next_clip_idx) = next_clip_callback(); + if (next_clip.pts_in != -1) { + got_next_clip = true; + in_pts_start_next_clip = next_clip.pts_in; + } + } + + // Switch to next clip if we got it. + if (got_next_clip) { + clip = next_clip; + clip_idx = next_clip_idx; + 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; + + // Start the next clip from the point where the fade went out. + origin = steady_clock::now(); + in_pts_origin = in_pts_start_next_clip; + goto got_clip; } - // TODO: callback so that the next playlist item can be cued. { - unique_lock lock(cue_state_mu); - cue_state = PAUSED; + unique_lock lock(queue_state_mu); + playing = false; + } + if (done_callback != nullptr) { + done_callback(); } } } -Player::Player(JPEGFrameView *destination) +// Find the frame immediately before and after this point. +bool Player::find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper) +{ + lock_guard 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, + [](const FrameOnDisk &frame, int64_t pts) { return frame.pts < pts; }); + if (it == frames[stream_idx].end()) { + return false; + } + *frame_upper = *it; + + // Find the last frame such that in_pts <= frame.pts (if any). + if (it == frames[stream_idx].begin()) { + *frame_lower = *it; + } else { + *frame_lower = *(it - 1); + } + assert(pts >= frame_lower->pts); + assert(pts <= frame_upper->pts); + return true; +} + +Player::Player(JPEGFrameView *destination, bool also_output_to_stream) : destination(destination) { - thread(&Player::thread_func, this).detach(); + thread(&Player::thread_func, this, also_output_to_stream).detach(); } -void Player::play_clip(const Clip &clip, unsigned stream_idx) +void Player::play_clip(const Clip &clip, size_t clip_idx, unsigned stream_idx) { { lock_guard lock(mu); current_clip = clip; current_stream_idx = stream_idx; + current_clip_idx = clip_idx; + } + + { + lock_guard lock(queue_state_mu); + new_clip_ready = true; + override_stream_idx = -1; + new_clip_changed.notify_all(); + } +} + +void Player::override_angle(unsigned stream_idx) +{ + // Corner case: If a new clip is waiting to be played, change its stream and then we're done. + { + unique_lock lock(queue_state_mu); + if (new_clip_ready) { + lock_guard lock2(mu); + current_stream_idx = stream_idx; + return; + } } + // If we are playing a clip, set override_stream_idx, and the player thread will + // pick it up and change its internal index. { - lock_guard lock(cue_state_mu); - cue_state = PLAYING; - cue_is_playing.notify_all(); + unique_lock lock(queue_state_mu); + if (playing) { + override_stream_idx = stream_idx; + new_clip_changed.notify_all(); + } } + + // OK, so we're standing still, presumably at the end of a clip. + // Look at the current pts_out (if it exists), and show the closest + // thing we've got. + int64_t pts_out; + { + lock_guard lock(mu); + if (current_clip.pts_out < 0) { + return; + } + pts_out = current_clip.pts_out; + } + + lock_guard lock(frame_mu); + auto it = upper_bound(frames[stream_idx].begin(), frames[stream_idx].end(), pts_out, + [](int64_t pts, const FrameOnDisk &frame) { return pts < frame.pts; }); + if (it == frames[stream_idx].end()) { + return; + } + destination->setFrame(stream_idx, *it); +} + +void Player::take_queue_spot() +{ + unique_lock lock(queue_state_mu); + ++num_queued_frames; +} + +void Player::release_queue_spot() +{ + unique_lock lock(queue_state_mu); + assert(num_queued_frames > 0); + --num_queued_frames; + new_clip_changed.notify_all(); }