5 #include "frame_on_disk.h"
6 #include "queue_spot_holder.h"
9 #include <libavformat/avformat.h>
10 #include <libavformat/avio.h>
13 #include <condition_variable>
23 class Player : public QueueInterface {
27 HTTPD_STREAM_OUTPUT, // Output to global_httpd.
28 FILE_STREAM_OUTPUT // Output to file_avctx.
30 Player(JPEGFrameView *destination, StreamOutput stream_output, AVFormatContext *file_avctx = nullptr);
33 void play(const Clip &clip)
35 play({ ClipWithID{ clip, 0 } });
37 void play(const std::vector<ClipWithID> &clips);
38 void override_angle(unsigned stream_idx); // Assumes one-clip playlist only.
40 // Replace the part of the playlist that we haven't started playing yet
41 // (ie., from the point immediately after the last current playing clip
42 // and to the end) with the given one.
44 // E.g., if we have the playlist A, B, C, D, E, F, we're currently in a fade
45 // from B to C and run splice_play() with the list G, C, H, I, the resulting
46 // list will be A, B, C, H, I. (If the new list doesn't contain B nor C,
47 // there will be some heuristics.) Note that we always compare on ID only;
48 // changes will be ignored for the purposes of setting the split point,
49 // although the newly-spliced entries will of course get the new in/out points
50 // etc., which is the main reason for going through this exercise in the first
53 // If nothing is playing, the call will be ignored.
54 void splice_play(const std::vector<ClipWithID> &clips);
56 // Set the status string that will be used for the video stream's status subtitles
57 // whenever we are not playing anything.
58 void set_pause_status(const std::string &status)
60 std::lock_guard<std::mutex> lock(queue_state_mu);
61 pause_status = status;
64 // Not thread-safe to set concurrently with playing.
65 // Will be called back from the player thread.
66 using done_callback_func = std::function<void()>;
67 void set_done_callback(done_callback_func cb) { done_callback = cb; }
69 // Not thread-safe to set concurrently with playing.
70 // Will be called back from the player thread.
71 // The keys in the given map are row members in the vector given to play().
72 using progress_callback_func = std::function<void(const std::map<uint64_t, double> &progress, double time_remaining)>;
73 void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
76 void take_queue_spot() override;
77 void release_queue_spot() override;
80 void thread_func(AVFormatContext *file_avctx);
81 void play_playlist_once();
82 void display_single_frame(int primary_stream_idx, const FrameOnDisk &primary_frame, int secondary_stream_idx, const FrameOnDisk &secondary_frame, double fade_alpha, std::chrono::steady_clock::time_point frame_start, bool snapped, const std::string &subtitle);
83 void open_output_stream();
84 static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
85 int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
87 // Find the frame immediately before and after this point.
88 // Returns false if pts is after the last frame.
89 bool find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper);
91 std::thread player_thread;
92 std::atomic<bool> should_quit{ false };
94 JPEGFrameView *destination;
95 done_callback_func done_callback;
96 progress_callback_func progress_callback;
98 std::mutex queue_state_mu;
99 std::condition_variable new_clip_changed;
100 std::vector<ClipWithID> queued_clip_list; // Under queue_state_mu.
101 bool new_clip_ready = false; // Under queue_state_mu.
102 bool playing = false; // Under queue_state_mu.
103 int override_stream_idx = -1; // Under queue_state_mu.
104 int64_t last_pts_played = -1; // Under queue_state_mu. Used by previews only.
106 bool splice_ready = false; // Under queue_state_mu.
107 std::vector<ClipWithID> to_splice_clip_list; // Under queue_state_mu.
108 std::string pause_status = "paused"; // Under queue_state_mu.
110 std::unique_ptr<VideoStream> video_stream; // Can be nullptr.
112 std::atomic<int64_t> metric_dropped_interpolated_frame{ 0 };
113 std::atomic<int64_t> metric_dropped_unconditional_frame{ 0 };
114 std::atomic<int64_t> metric_faded_frame{ 0 };
115 std::atomic<int64_t> metric_faded_snapped_frame{ 0 };
116 std::atomic<int64_t> metric_original_frame{ 0 };
117 std::atomic<int64_t> metric_original_snapped_frame{ 0 };
118 std::atomic<int64_t> metric_refresh_frame{ 0 };
119 std::atomic<int64_t> metric_interpolated_frame{ 0 };
120 std::atomic<int64_t> metric_interpolated_faded_frame{ 0 };
122 // under queue_state_mu. Part of this instead of VideoStream so that we own
123 // its lock and can sleep on it.
124 size_t num_queued_frames = 0;
125 static constexpr size_t max_queued_frames = 10;
127 // State private to the player thread.
129 const StreamOutput stream_output;
132 double compute_time_left(const std::vector<ClipWithID> &clips, size_t currently_playing_idx, double progress_currently_playing);
134 static inline double compute_total_time(const std::vector<ClipWithID> &clips)
136 return compute_time_left(clips, 0, 0.0);
139 std::string format_duration(double t);
141 #endif // !defined(_PLAYER_H)