timeline: heavily optimized and improved nearly all timeline optimizations

Features a lot of timeline-related cache optimizations as well as general optimizations and improvements in timeline behavior. Should improve usability significantly.
2020-06-01 04:42:59 +10:00
parent 93f8b4f79c
commit c2e47a296c
35 changed files with 1496 additions and 939 deletions
@@ -0,0 +1,110 @@
+/***
+
+  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 SUMSAMPLES_H
+#define SUMSAMPLES_H
+
+#include <QFloat16>
+#include <QPainter>
+#include <QVector>
+
+#include "codec/samplebuffer.h"
+
+OLIVE_NAMESPACE_ENTER
+
+/**
+ * @brief A buffer of data used to store a visual representation of audio
+ *
+ * This differs from a SampleBuffer as the data in an AudioVisualWaveform has been reduced
+ * significantly and optimized for visual display.
+ */
+class AudioVisualWaveform {
+public:
+  AudioVisualWaveform() = default;
+
+  struct SamplePerChannel {
+    qfloat16 min = 0;
+    qfloat16 max = 0;
+  };
+
+  using Sample = QVector<SamplePerChannel>;
+
+  int channel_count() const
+  {
+    return channels_;
+  }
+
+  void set_channel_count(int channels)
+  {
+    channels_ = channels;
+  }
+
+  int nb_samples() const
+  {
+    return data_.size();
+  }
+
+  const SamplePerChannel* const_data() const
+  {
+    return data_.constData();
+  }
+
+  void AddSum(const float* samples, int nb_samples, int nb_channels);
+
+  void OverwriteSamples(SampleBufferPtr samples, int sample_rate, const rational& start);
+
+  AudioVisualWaveform Cut(const rational& time);
+  void Append(const AudioVisualWaveform& waveform);
+  void TrimIn(const rational& time);
+  void TrimOut(const rational& time);
+  void PrependSilence(const rational& time);
+  void AppendSilence(const rational& time);
+
+  // FIXME: Move to dynamic
+  static const int kSumSampleRate;
+
+  static QVector<SamplePerChannel> SumSamples(const float* samples, int nb_samples, int nb_channels);
+  static QVector<SamplePerChannel> SumSamples(const qfloat16* samples, int nb_samples, int nb_channels);
+  static QVector<SamplePerChannel> SumSamples(SampleBufferPtr samples, int start_index, int length);
+
+  static QVector<SamplePerChannel> ReSumSamples(const SamplePerChannel *samples, int nb_samples, int nb_channels);
+
+  static void DrawSample(QPainter* painter, const QVector<SamplePerChannel> &sample, int x, int y, int height);
+
+  static void DrawWaveform(QPainter* painter, const QRect &rect, const double &scale, const AudioVisualWaveform& samples);
+
+private:
+  template <typename T>
+  static QVector<SamplePerChannel> SumSamplesInternal(const T* samples, int nb_samples, int nb_channels);
+
+  template <typename T>
+  static void ClampMinMax(SamplePerChannel &sum, T value);
+
+  int time_to_samples(const rational& time) const;
+
+  int channels_ = 0;
+
+  QVector<SamplePerChannel> data_;
+
+};
+
+OLIVE_NAMESPACE_EXIT
+
+#endif // SUMSAMPLES_H