lnav/src/spectro_source.hh

/**
 * Copyright (c) 2016, Timothy Stack
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 * * Neither the name of Timothy Stack nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @file spectroview_curses.hh
 */

#ifndef spectro_source_hh
#define spectro_source_hh

#include <map>
#include <vector>

#include <math.h>
#include <time.h>

#include "textview_curses.hh"

struct spectrogram_bounds {
    time_t sb_begin_time{0};
    time_t sb_end_time{0};
    double sb_min_value_out{0.0};
    double sb_max_value_out{0.0};
    int64_t sb_count{0};
};

struct spectrogram_thresholds {
    int st_green_threshold{0};
    int st_yellow_threshold{0};
};

struct spectrogram_request {
    explicit spectrogram_request(spectrogram_bounds& sb) : sr_bounds(sb){};

    spectrogram_bounds& sr_bounds;
    unsigned long sr_width{0};
    time_t sr_begin_time{0};
    time_t sr_end_time{0};
    double sr_column_size{0};
};

struct spectrogram_row {
    ~spectrogram_row()
    {
        delete[] this->sr_values;
    }

    struct row_bucket {
        row_bucket() : rb_counter(0), rb_marks(0){};

        int rb_counter;
        int rb_marks;
    };

    row_bucket* sr_values{nullptr};
    unsigned long sr_width{0};
    double sr_column_size{0.0};

    void add_value(spectrogram_request& sr, double value, bool marked)
    {
        long index = lrint((value - sr.sr_bounds.sb_min_value_out)
                           / sr.sr_column_size);

        this->sr_values[index].rb_counter += 1;
        if (marked) {
            this->sr_values[index].rb_marks += 1;
        }
    };
};

class spectrogram_value_source {
public:
    virtual ~spectrogram_value_source() = default;

    virtual void spectro_bounds(spectrogram_bounds& sb_out) = 0;

    virtual void spectro_row(spectrogram_request& sr, spectrogram_row& row_out)
        = 0;

    virtual void spectro_mark(textview_curses& tc,
                              time_t begin_time,
                              time_t end_time,
                              double range_min,
                              double range_max)
        = 0;
};

class spectrogram_source
    : public text_sub_source
    , public text_time_translator
    , public list_overlay_source
    , public list_input_delegate {
public:
    ~spectrogram_source() override = default;

    void invalidate()
    {
        this->ss_cached_bounds.sb_count = 0;
        this->ss_row_cache.clear();
        this->ss_cursor_column = -1;
    };

    bool list_input_handle_key(listview_curses& lv, int ch) override;

    bool list_value_for_overlay(const listview_curses& lv,
                                int y,
                                int bottom,
                                vis_line_t row,
                                attr_line_t& value_out) override;

    size_t text_line_count() override;

    size_t text_line_width(textview_curses& tc) override;

    size_t text_size_for_line(textview_curses& tc,
                              int row,
                              line_flags_t flags) override
    {
        return 0;
    };

    nonstd::optional<struct timeval> time_for_row(vis_line_t row) override;

    nonstd::optional<vis_line_t> row_for_time(
        struct timeval time_bucket) override;

    void text_value_for_line(textview_curses& tc,
                             int row,
                             std::string& value_out,
                             line_flags_t flags) override;

    void text_attrs_for_line(textview_curses& tc,
                             int row,
                             string_attrs_t& value_out) override;

    void cache_bounds();

    spectrogram_row& load_row(textview_curses& tc, int row);

    int ss_granularity{60};
    spectrogram_value_source* ss_value_source{nullptr};
    spectrogram_bounds ss_cached_bounds;
    spectrogram_thresholds ss_cached_thresholds;
    size_t ss_cached_line_count{0};
    std::map<time_t, spectrogram_row> ss_row_cache;
    vis_line_t ss_cursor_top;
    int ss_cursor_column{-1};
};

#endif