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;
66 should_skip_to_next = true;
69 void set_master_speed(float speed)
71 change_master_speed = speed;
74 // Not thread-safe to set concurrently with playing.
75 // Will be called back from the player thread.
76 using done_callback_func = std::function<void()>;
77 void set_done_callback(done_callback_func cb) { done_callback = cb; }
79 // Not thread-safe to set concurrently with playing.
80 // Will be called back from the player thread.
81 // The keys in the given map are row members in the vector given to play().
82 using progress_callback_func = std::function<void(const std::map<uint64_t, double> &progress, double time_remaining)>;
83 void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
86 void take_queue_spot() override;
87 void release_queue_spot() override;
90 void thread_func(AVFormatContext *file_avctx);
91 void play_playlist_once();
92 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);
93 void open_output_stream();
94 static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
95 int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
97 // Find the frame immediately before and after this point.
98 // Returns false if pts is after the last frame.
99 bool find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper);
101 std::thread player_thread;
102 std::atomic<bool> should_quit{ false };
103 std::atomic<bool> should_skip_to_next{ false };
104 std::atomic<float> change_master_speed{ 0.0f / 0.0f };
106 JPEGFrameView *destination;
107 done_callback_func done_callback;
108 progress_callback_func progress_callback;
110 std::mutex queue_state_mu;
111 std::condition_variable new_clip_changed;
112 std::vector<ClipWithID> queued_clip_list; // Under queue_state_mu.
113 bool new_clip_ready = false; // Under queue_state_mu.
114 bool playing = false; // Under queue_state_mu.
115 int override_stream_idx = -1; // Under queue_state_mu.
116 int64_t last_pts_played = -1; // Under queue_state_mu. Used by previews only.
118 bool splice_ready = false; // Under queue_state_mu.
119 std::vector<ClipWithID> to_splice_clip_list; // Under queue_state_mu.
120 std::string pause_status = "paused"; // Under queue_state_mu.
122 std::unique_ptr<VideoStream> video_stream; // Can be nullptr.
124 std::atomic<int64_t> metric_dropped_interpolated_frame{ 0 };
125 std::atomic<int64_t> metric_dropped_unconditional_frame{ 0 };
126 std::atomic<int64_t> metric_faded_frame{ 0 };
127 std::atomic<int64_t> metric_faded_snapped_frame{ 0 };
128 std::atomic<int64_t> metric_original_frame{ 0 };
129 std::atomic<int64_t> metric_original_snapped_frame{ 0 };
130 std::atomic<int64_t> metric_refresh_frame{ 0 };
131 std::atomic<int64_t> metric_interpolated_frame{ 0 };
132 std::atomic<int64_t> metric_interpolated_faded_frame{ 0 };
134 // under queue_state_mu. Part of this instead of VideoStream so that we own
135 // its lock and can sleep on it.
136 size_t num_queued_frames = 0;
137 static constexpr size_t max_queued_frames = 10;
139 // State private to the player thread.
141 const StreamOutput stream_output;
144 double compute_time_left(const std::vector<ClipWithID> &clips, size_t currently_playing_idx, double progress_currently_playing);
146 static inline double compute_total_time(const std::vector<ClipWithID> &clips)
148 return compute_time_left(clips, 0, 0.0);
151 std::string format_duration(double t);
153 #endif // !defined(_PLAYER_H)