/***

    Olive - Non-Linear Video Editor
    Copyright (C) 2019  Olive Team

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#ifndef CLIP_H
#define CLIP_H

#include <QWaitCondition>
#include <QMutex>
#include <QVector>
#include <QOpenGLFramebufferObject>
#include <QOpenGLTexture>

#include "playback/cacher.h"

#include "project/effect.h"
#include "project/transition.h"
#include "project/comboaction.h"
#include "project/media.h"
#include "footage.h"

#include "marker.h"

extern "C" {
#include <libavformat/avformat.h>
#include <libavfilter/avfilter.h>
}

using ClipPtr = std::shared_ptr<Clip>;

class Sequence;
using SequencePtr = std::shared_ptr<Sequence>;

class Clip {
public:
  Clip(SequencePtr s);
  ~Clip();
  ClipPtr copy(SequencePtr s, bool duplicate_transitions = true);
  void reset_audio();
  void reset();
  void refresh();
  long get_clip_in_with_transition();
  long get_timeline_in_with_transition();
  long get_timeline_out_with_transition();
  long getLength();
  double getMediaFrameRate();
  long getMaximumLength();
  void recalculateMaxLength();
  int getWidth();
  int getHeight();
  void refactor_frame_rate(ComboAction* ca, double multiplier, bool change_timeline_points);
  SequencePtr sequence;

  // queue functions
  void queue_clear();
  void queue_remove_earliest();

  // timeline variables (should be copied in copy())
  bool enabled;
  long clip_in;
  long timeline_in;
  long timeline_out;
  int track;
  QString name;
  quint8 color_r;
  quint8 color_g;
  quint8 color_b;
  Media* media;
  int media_stream;
  double speed;
  double cached_fr;
  bool reverse;
  bool maintain_audio_pitch;
  bool autoscale;

  // markers
  QVector<Marker>& get_markers();

  // other variables (should be deep copied/duplicated in copy())
  QList<EffectPtr> effects;
  QVector<int> linked;
  TransitionPtr opening_transition;
  TransitionPtr get_opening_transition();
  TransitionPtr closing_transition;
  TransitionPtr get_closing_transition();

  // media handling
  AVFormatContext* formatCtx;
  AVStream* stream;
  AVCodec* codec;
  AVCodecContext* codecCtx;
  AVPacket* pkt;
  AVFrame* frame;
  AVDictionary* opts;
  long calculated_length;

  // temporary variables
  int load_id;
  bool undeletable;
  bool reached_end;
  bool pkt_written;
  bool open;
  bool finished_opening;
  bool replaced;
  bool ignore_reverse;
  int pix_fmt;

  // caching functions
  bool use_existing_frame;
  bool multithreaded;
  Cacher* cacher;
  QWaitCondition can_cache;
  int max_queue_size;
  QVector<AVFrame*> queue;
  QMutex queue_lock;
  QMutex lock;
  QMutex open_lock;
  int64_t last_invalid_ts;

  // converters/filters
  AVFilterGraph* filter_graph;
  AVFilterContext* buffersink_ctx;
  AVFilterContext* buffersrc_ctx;

  // video playback variables
  QOpenGLFramebufferObject** fbo;
  QOpenGLTexture* texture;
  long texture_frame;

  // audio playback variables
  int64_t reverse_target;
  int frame_sample_index;
  qint64 audio_buffer_write;
  bool audio_reset;
  bool audio_just_reset;
  long audio_target_frame;
private:
  QVector<Marker> markers;
};

#endif // CLIP_H