+#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 <algorithm>
#include <chrono>
#include <condition_variable>
+#include <movit/util.h>
#include <mutex>
+#include <stdio.h>
#include <thread>
#include <vector>
-#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<int64_t> 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<mutex> lock(queue_state_mu);
- new_clip_changed.wait(lock, [this]{
+ 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<duration<size_t, TimebaseRatio>>(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<mutex> 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<mutex> 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, aborted = false;
- while (!eof) {
- // 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);
+ 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);
- // Sleep until the next frame start, or until there's a new clip we're supposed to play.
- {
- unique_lock<mutex> lock(queue_state_mu);
- aborted = new_clip_changed.wait_until(lock, next_frame_start, [this]{
- return new_clip_ready;
- });
- eof |= aborted;
+ 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<double>(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);
+ }
}
- destination->setFrame(stream_idx, next_pts);
+ // 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<size_t, double> 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<mutex> lock(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<mutex> 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 (snapped) {
+ continue;
+ }
+
+ 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 - 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> 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);
+ }
}
- if (done_callback != nullptr && !aborted) {
+ // 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;
+ }
+
+ {
+ unique_lock<mutex> 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<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,
+ [](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<mutex> lock(mu);
current_clip = clip;
current_stream_idx = stream_idx;
+ current_clip_idx = clip_idx;
}
{
lock_guard<mutex> 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<mutex> lock(queue_state_mu);
+ if (new_clip_ready) {
+ lock_guard<mutex> 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.
+ {
+ unique_lock<mutex> 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<mutex> lock(mu);
+ if (current_clip.pts_out < 0) {
+ return;
+ }
+ pts_out = current_clip.pts_out;
+ }
+
+ lock_guard<mutex> 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<mutex> lock(queue_state_mu);
+ ++num_queued_frames;
+}
+
+void Player::release_queue_spot()
+{
+ unique_lock<mutex> lock(queue_state_mu);
+ assert(num_queued_frames > 0);
+ --num_queued_frames;
+ new_clip_changed.notify_all();
+}
projects / nageru / blobdiff