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

   1 #ifndef _PLAYER_H
   2 #define _PLAYER_H 1
   3
   4 #include "clip_list.h"
   5
   6 extern "C" {
   7 #include <libavformat/avio.h>
   8 }
   9
  10 #include <condition_variable>
  11 #include <functional>
  12 #include <mutex>
  13
  14 class JPEGFrameView;
  15 class VideoStream;
  16 class QSurface;
  17 class QSurfaceFormat;
  18
  19 class Player {
  20 public:
  21         Player(JPEGFrameView *destination, bool also_output_to_stream);
  22
  23         void play_clip(const Clip &clip, unsigned stream_idx);
  24         void override_angle(unsigned stream_idx);  // For the current clip only.
  25
  26         // Not thread-safe to set concurrently with playing.
  27         // Will be called back from the player thread.
  28         using done_callback_func = std::function<void()>;
  29         void set_done_callback(done_callback_func cb) { done_callback = cb; }
  30
  31         // Not thread-safe to set concurrently with playing.
  32         // Will be called back from the player thread.
  33         using next_clip_callback_func = std::function<Clip()>;
  34         void set_next_clip_callback(next_clip_callback_func cb) { next_clip_callback = cb; }
  35
  36         // Not thread-safe to set concurrently with playing.
  37         // Will be called back from the player thread.
  38         using progress_callback_func = std::function<void(double played_this_clip, double total_length)>;
  39         void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
  40
  41 private:
  42         void thread_func(bool also_output_to_stream);
  43         void open_output_stream();
  44         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  45         int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  46
  47         // Find the frame immediately before and after this point.
  48         // Returns false if pts is after the last frame.
  49         bool find_surrounding_frames(int64_t pts, int stream_idx, int64_t *pts_lower, int64_t *pts_upper);
  50
  51         JPEGFrameView *destination;
  52         done_callback_func done_callback;
  53         next_clip_callback_func next_clip_callback;
  54         progress_callback_func progress_callback;
  55
  56         std::mutex mu;
  57         Clip current_clip;  // Under mu. Can have pts_in = -1 for no clip.
  58         unsigned current_stream_idx;  // Under mu.
  59
  60         std::mutex queue_state_mu;
  61         std::condition_variable new_clip_changed;
  62         bool new_clip_ready = false;  // Under queue_state_mu.
  63         bool playing = false;  // Under queue_state_mu.
  64         int override_stream_idx = -1;  // Under queue_state_mu.
  65
  66         std::unique_ptr<VideoStream> video_stream;  // Can be nullptr.
  67
  68         // under queue_state_mu. Part of this instead of VideoStream so that we own
  69         // its lock and can sleep on it.
  70         size_t num_queued_frames = 0;
  71         static constexpr size_t max_queued_frames = 10;
  72 };
  73
  74 #endif  // !defined(_PLAYER_H)