#include <thread>
#include <vector>
+#include <stdio.h>
+
+#include <movit/util.h>
+
#include "clip_list.h"
+#include "context.h"
#include "defs.h"
+#include "ffmpeg_raii.h"
+#include "httpd.h"
#include "jpeg_frame_view.h"
+#include "mux.h"
#include "player.h"
+#include "timebase.h"
+#include "video_stream.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;
+
for ( ;; ) {
// Wait until we're supposed to play something.
{
return new_clip_ready && current_clip.pts_in != -1;
});
new_clip_ready = false;
+ playing = true;
}
Clip clip;
stream_idx = current_stream_idx;
}
steady_clock::time_point origin = steady_clock::now();
- int64_t pts_origin = clip.pts_in;
+ int64_t in_pts_origin = clip.pts_in;
+ int64_t out_pts_origin = pts;
+
+ // Start playing exactly at a frame.
+ {
+ 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);
+ if (it != frames[stream_idx].end()) {
+ in_pts_origin = *it;
+ }
+ }
- 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;
+ 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 =
- 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;
+ 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;
}
- destination->setFrame(stream_idx, next_pts);
+ int64_t in_pts_lower, in_pts_upper;
- // Find the next frame.
+ // Find the frame immediately before and after this point.
{
lock_guard<mutex> lock(frame_mu);
- auto it = upper_bound(frames[stream_idx].begin(),
+
+ // Find the first frame such that in_pts >= frame.pts.
+ auto it = lower_bound(frames[stream_idx].begin(),
frames[stream_idx].end(),
- next_pts);
- if (it == frames[stream_idx].end()) {
- eof = true;
+ in_pts);
+ if (it == frames[stream_idx].end() || *it >= clip.pts_out) {
+ break;
+ }
+ 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 {
- next_pts = *it;
- if (next_pts >= clip.pts_out) {
- eof = true;
- }
+ in_pts_lower = *(it - 1);
}
}
+ assert(in_pts >= in_pts_lower);
+ assert(in_pts <= in_pts_upper);
+
+ // 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);
+ new_clip_changed.wait_until(lock, next_frame_start, [this]{
+ return new_clip_ready || override_stream_idx != -1;
+ });
+ if (new_clip_ready) break;
+ if (override_stream_idx != -1) {
+ stream_idx = override_stream_idx;
+ override_stream_idx = -1;
+ continue;
+ }
+ }
+
+ 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);
+ }
+
+ if (in_pts_lower == in_pts_upper) {
+ destination->setFrame(stream_idx, in_pts_lower, /*interpolated=*/false);
+ if (video_stream != nullptr) {
+ video_stream->schedule_original_frame(lrint(out_pts), stream_idx, in_pts_lower);
+ }
+ 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, /*interpolated=*/false);
+ if (video_stream != nullptr) {
+ video_stream->schedule_original_frame(lrint(out_pts), stream_idx, in_pts_lower);
+ }
+ in_pts_origin += in_pts_lower - in_pts;
+ continue;
+ } else if (fabs(in_pts_upper_as_frameno - frameno) < 0.01) {
+ destination->setFrame(stream_idx, in_pts_upper, /*interpolated=*/false);
+ 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;
+ 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 - in_pts_lower) / (in_pts_upper - in_pts_lower);
+
+ if (video_stream == nullptr) {
+ // Previews don't do any interpolation.
+ destination->setFrame(stream_idx, in_pts_lower, /*interpolated=*/false);
+ } else {
+ // Calculate the interpolated frame. When it's done, the destination
+ // will be unblocked.
+ destination->setFrame(stream_idx, lrint(out_pts), /*interpolated=*/true);
+ video_stream->schedule_interpolated_frame(lrint(out_pts), stream_idx, in_pts_lower, in_pts_upper, alpha);
+ }
}
+ {
+ unique_lock<mutex> lock(queue_state_mu);
+ playing = false;
+ }
if (done_callback != nullptr && !aborted) {
done_callback();
}
}
}
-Player::Player(JPEGFrameView *destination)
+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)
{
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);
+ if (it == frames[stream_idx].end()) {
+ return;
+ }
+ destination->setFrame(stream_idx, *it, /*interpolated=*/false);
+}
projects / nageru / blobdiff