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 "frame_on_disk.h"
   6 #include "queue_spot_holder.h"
   7
   8 extern "C" {
   9 #include <libavformat/avio.h>
  10 }
  11
  12 #include <condition_variable>
  13 #include <functional>
  14 #include <mutex>
  15
  16 class JPEGFrameView;
  17 class VideoStream;
  18 class QSurface;
  19 class QSurfaceFormat;
  20
  21 class Player : public QueueInterface {
  22 public:
  23         Player(JPEGFrameView *destination, bool also_output_to_stream);
  24
  25         void play_clip(const Clip &clip, size_t clip_idx, unsigned stream_idx);
  26         void override_angle(unsigned stream_idx);  // For the current clip only.
  27
  28         // Not thread-safe to set concurrently with playing.
  29         // Will be called back from the player thread.
  30         using done_callback_func = std::function<void()>;
  31         void set_done_callback(done_callback_func cb) { done_callback = cb; }
  32
  33         // Not thread-safe to set concurrently with playing.
  34         // Will be called back from the player thread.
  35         // The second parameter is the clip's position in the play list.
  36         using next_clip_callback_func = std::function<std::pair<Clip, size_t>()>;
  37         void set_next_clip_callback(next_clip_callback_func cb) { next_clip_callback = cb; }
  38
  39         // Not thread-safe to set concurrently with playing.
  40         // Will be called back from the player thread.
  41         using progress_callback_func = std::function<void(const std::map<size_t, double> &progress)>;
  42         void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
  43
  44         // QueueInterface.
  45         void take_queue_spot() override;
  46         void release_queue_spot() override;
  47
  48 private:
  49         void thread_func(bool also_output_to_stream);
  50         void open_output_stream();
  51         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  52         int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  53
  54         // Find the frame immediately before and after this point.
  55         // Returns false if pts is after the last frame.
  56         bool find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper);
  57
  58         JPEGFrameView *destination;
  59         done_callback_func done_callback;
  60         next_clip_callback_func next_clip_callback;
  61         progress_callback_func progress_callback;
  62
  63         std::mutex mu;
  64         Clip current_clip;  // Under mu. Can have pts_in = -1 for no clip.
  65         size_t current_clip_idx;  // Under mu.
  66         unsigned current_stream_idx;  // Under mu.
  67
  68         std::mutex queue_state_mu;
  69         std::condition_variable new_clip_changed;
  70         bool new_clip_ready = false;  // Under queue_state_mu.
  71         bool playing = false;  // Under queue_state_mu.
  72         int override_stream_idx = -1;  // Under queue_state_mu.
  73
  74         std::unique_ptr<VideoStream> video_stream;  // Can be nullptr.
  75
  76         // under queue_state_mu. Part of this instead of VideoStream so that we own
  77         // its lock and can sleep on it.
  78         size_t num_queued_frames = 0;
  79         static constexpr size_t max_queued_frames = 10;
  80 };
  81
  82 #endif  // !defined(_PLAYER_H)