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 class Player : public QueueInterface {
  24 public:
  25         enum StreamOutput {
  26                 NO_STREAM_OUTPUT,
  27                 HTTPD_STREAM_OUTPUT,  // Output to global_httpd.
  28                 FILE_STREAM_OUTPUT    // Output to file_avctx.
  29         };
  30         Player(JPEGFrameView *destination, StreamOutput stream_output, AVFormatContext *file_avctx = nullptr);
  31         ~Player();
  32
  33         void play_clip(const Clip &clip, size_t clip_idx, unsigned stream_idx);
  34         void override_angle(unsigned stream_idx);  // For the current clip only.
  35
  36         // Not thread-safe to set concurrently with playing.
  37         // Will be called back from the player thread.
  38         using done_callback_func = std::function<void()>;
  39         void set_done_callback(done_callback_func cb) { done_callback = cb; }
  40
  41         // Not thread-safe to set concurrently with playing.
  42         // Will be called back from the player thread.
  43         // The second parameter is the clip's position in the play list.
  44         using next_clip_callback_func = std::function<std::pair<Clip, size_t>()>;
  45         void set_next_clip_callback(next_clip_callback_func cb) { next_clip_callback = cb; }
  46
  47         // Not thread-safe to set concurrently with playing.
  48         // Will be called back from the player thread.
  49         using progress_callback_func = std::function<void(const std::map<size_t, double> &progress)>;
  50         void set_progress_callback(progress_callback_func cb) { progress_callback = cb; }
  51
  52         // QueueInterface.
  53         void take_queue_spot() override;
  54         void release_queue_spot() override;
  55
  56 private:
  57         void thread_func(StreamOutput stream_output, AVFormatContext *file_avctx);
  58         void open_output_stream();
  59         static int write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  60         int write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time);
  61
  62         // Find the frame immediately before and after this point.
  63         // Returns false if pts is after the last frame.
  64         bool find_surrounding_frames(int64_t pts, int stream_idx, FrameOnDisk *frame_lower, FrameOnDisk *frame_upper);
  65
  66         std::thread player_thread;
  67         std::atomic<bool> should_quit{false};
  68
  69         JPEGFrameView *destination;
  70         done_callback_func done_callback;
  71         next_clip_callback_func next_clip_callback;
  72         progress_callback_func progress_callback;
  73
  74         std::mutex mu;
  75         Clip current_clip;  // Under mu. Can have pts_in = -1 for no clip.
  76         size_t current_clip_idx;  // Under mu.
  77         unsigned current_stream_idx;  // Under mu.
  78
  79         std::mutex queue_state_mu;
  80         std::condition_variable new_clip_changed;
  81         bool new_clip_ready = false;  // Under queue_state_mu.
  82         bool playing = false;  // Under queue_state_mu.
  83         int override_stream_idx = -1;  // Under queue_state_mu.
  84
  85         std::unique_ptr<VideoStream> video_stream;  // Can be nullptr.
  86
  87         // under queue_state_mu. Part of this instead of VideoStream so that we own
  88         // its lock and can sleep on it.
  89         size_t num_queued_frames = 0;
  90         static constexpr size_t max_queued_frames = 10;
  91 };
  92
  93 #endif  // !defined(_PLAYER_H)