git.sesse.net Git - nageru/blob - futatabi/player.h

   1 #ifndef _PLAYER_H
   2 #define _PLAYER_H 1
   3
   4 #include "clip_list.h"
   5 #include "frame_on_disk.h"
   6 #include "queue_spot_holder.h"
   7
   8 extern "C" {
   9 #include <libavformat/avformat.h>
  10 #include <libavformat/avio.h>
  11 }
  12
  13 #include <condition_variable>
  14 #include <functional>
  15 #include <mutex>
  16 #include <thread>
  17
  18 class JPEGFrameView;
  19 class VideoStream;
  20 class QSurface;
  21 class QSurfaceFormat;
  22
  23 double compute_time_left(const std::vector<Clip> &clips, const std::map<size_t, double> &progress);
  24
  25 class Player : public QueueInterface {
  26 public:
  27         enum StreamOutput {
  28                 NO_STREAM_OUTPUT,
  29                 HTTPD_STREAM_OUTPUT,  // Output to global_httpd.
  30                 FILE_STREAM_OUTPUT    // Output to file_avctx.
  31         };
  32         Player(JPEGFrameView *destination, StreamOutput stream_output, AVFormatContext *file_avctx = nullptr);
  33         ~Player();
  34
  35         struct ClipWithRow {
  36                 Clip clip;
  37                 unsigned row;  // Used for progress callback only.
  38         };
  39         void play(const Clip &clip)
  40         {
  41                 play({ ClipWithRow{ clip, 0 } });
  42         }
  43         void play(const std::vector<ClipWithRow> &clips);
  44         void override_angle(unsigned stream_idx);  // Assumes one-clip playlist only.
  45
  46         // Not thread-safe to set concurrently with playing.
  47         // Will be called back from the player thread.
  48         using done_callback_func = std::function<void()>;
  49         void set_done_callback(done_callback_func cb) { done_callback = cb; }
  50
  51         // Not thread-safe to set concurrently with playing.
  52         // Will be called back from the player thread.
  53         // The keys in the given map are row members in the vector given to play().
  54         using progress_callback_func = std::function<void(const std::map<size_t, double> &progress)>;
  55         void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
  56
  57         // QueueInterface.
  58         void take_queue_spot() override;
  59         void release_queue_spot() override;
  60
  61 private:
  62         void thread_func(AVFormatContext *file_avctx);
  63         void play_playlist_once();
  64         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);
  65         void open_output_stream();
  66         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  67         int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  68
  69         // Find the frame immediately before and after this point.
  70         // Returns false if pts is after the last frame.
  71         bool find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper);
  72
  73         std::thread player_thread;
  74         std::atomic<bool> should_quit{ false };
  75
  76         JPEGFrameView *destination;
  77         done_callback_func done_callback;
  78         progress_callback_func progress_callback;
  79
  80         std::mutex queue_state_mu;
  81         std::condition_variable new_clip_changed;
  82         std::vector<ClipWithRow> queued_clip_list;  // Under queue_state_mu.
  83         bool new_clip_ready = false;  // Under queue_state_mu.
  84         bool playing = false;  // Under queue_state_mu.
  85         int override_stream_idx = -1;  // Under queue_state_mu.
  86         int64_t last_pts_played = -1;  // Under queue_state_mu. Used by previews only.
  87
  88         std::unique_ptr<VideoStream> video_stream;  // Can be nullptr.
  89
  90         std::atomic<int64_t> metric_dropped_interpolated_frame{ 0 };
  91         std::atomic<int64_t> metric_dropped_unconditional_frame{ 0 };
  92         std::atomic<int64_t> metric_faded_frame{ 0 };
  93         std::atomic<int64_t> metric_faded_snapped_frame{ 0 };
  94         std::atomic<int64_t> metric_original_frame{ 0 };
  95         std::atomic<int64_t> metric_original_snapped_frame{ 0 };
  96         std::atomic<int64_t> metric_refresh_frame{ 0 };
  97         std::atomic<int64_t> metric_interpolated_frame{ 0 };
  98         std::atomic<int64_t> metric_interpolated_faded_frame{ 0 };
  99
 100         // under queue_state_mu. Part of this instead of VideoStream so that we own
 101         // its lock and can sleep on it.
 102         size_t num_queued_frames = 0;
 103         static constexpr size_t max_queued_frames = 10;
 104
 105         // State private to the player thread.
 106         int64_t pts = 0;
 107         const StreamOutput stream_output;
 108 };
 109
 110 #endif  // !defined(_PLAYER_H)