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

   1 #ifndef _PLAYER_H
   2 #define _PLAYER_H 1
   3
   4 #include "clip_list.h"
   5 #include "queue_spot_holder.h"
   6
   7 extern "C" {
   8 #include <libavformat/avio.h>
   9 }
  10
  11 #include <condition_variable>
  12 #include <functional>
  13 #include <mutex>
  14
  15 class JPEGFrameView;
  16 class VideoStream;
  17 class QSurface;
  18 class QSurfaceFormat;
  19
  20 class Player : public QueueInterface {
  21 public:
  22         Player(JPEGFrameView *destination, bool also_output_to_stream);
  23
  24         void play_clip(const Clip &clip, unsigned stream_idx);
  25         void override_angle(unsigned stream_idx);  // For the current clip only.
  26
  27         // Not thread-safe to set concurrently with playing.
  28         // Will be called back from the player thread.
  29         using done_callback_func = std::function<void()>;
  30         void set_done_callback(done_callback_func cb) { done_callback = cb; }
  31
  32         // Not thread-safe to set concurrently with playing.
  33         // Will be called back from the player thread.
  34         using next_clip_callback_func = std::function<Clip()>;
  35         void set_next_clip_callback(next_clip_callback_func cb) { next_clip_callback = cb; }
  36
  37         // Not thread-safe to set concurrently with playing.
  38         // Will be called back from the player thread.
  39         using progress_callback_func = std::function<void(double played_this_clip, double total_length)>;
  40         void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
  41
  42         // QueueInterface.
  43         void take_queue_spot() override;
  44         void release_queue_spot() override;
  45
  46 private:
  47         void thread_func(bool also_output_to_stream);
  48         void open_output_stream();
  49         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  50         int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  51
  52         // Find the frame immediately before and after this point.
  53         // Returns false if pts is after the last frame.
  54         bool find_surrounding_frames(int64_t pts, int stream_idx, int64_t *pts_lower, int64_t *pts_upper);
  55
  56         JPEGFrameView *destination;
  57         done_callback_func done_callback;
  58         next_clip_callback_func next_clip_callback;
  59         progress_callback_func progress_callback;
  60
  61         std::mutex mu;
  62         Clip current_clip;  // Under mu. Can have pts_in = -1 for no clip.
  63         unsigned current_stream_idx;  // Under mu.
  64
  65         std::mutex queue_state_mu;
  66         std::condition_variable new_clip_changed;
  67         bool new_clip_ready = false;  // Under queue_state_mu.
  68         bool playing = false;  // Under queue_state_mu.
  69         int override_stream_idx = -1;  // Under queue_state_mu.
  70
  71         std::unique_ptr<VideoStream> video_stream;  // Can be nullptr.
  72
  73         // under queue_state_mu. Part of this instead of VideoStream so that we own
  74         // its lock and can sleep on it.
  75         size_t num_queued_frames = 0;
  76         static constexpr size_t max_queued_frames = 10;
  77 };
  78
  79 #endif  // !defined(_PLAYER_H)