mirror of https://github.com/tstack/lnav.git
413 lines
12 KiB
C++
413 lines
12 KiB
C++
/**
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* Copyright (c) 2020, Timothy Stack
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* * Neither the name of Timothy Stack nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @file spectro_source.cc
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*/
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#include "spectro_source.hh"
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#include "base/ansi_scrubber.hh"
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#include "base/math_util.hh"
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#include "config.h"
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bool
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spectrogram_source::list_input_handle_key(listview_curses& lv, int ch)
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{
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switch (ch) {
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case 'm': {
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if (this->ss_cursor_top < 0
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|| (size_t) this->ss_cursor_top >= this->text_line_count()
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|| this->ss_cursor_column == -1
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|| this->ss_value_source == nullptr)
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{
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alerter::singleton().chime();
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return true;
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}
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unsigned long width;
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vis_line_t height;
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lv.get_dimensions(height, width);
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spectrogram_bounds& sb = this->ss_cached_bounds;
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auto begin_time_opt = this->time_for_row(this->ss_cursor_top);
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if (!begin_time_opt) {
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return true;
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}
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auto begin_time = begin_time_opt.value();
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struct timeval end_time = begin_time;
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end_time.tv_sec += this->ss_granularity;
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double range_min, range_max, column_size;
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column_size = (sb.sb_max_value_out - sb.sb_min_value_out)
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/ (double) (width - 1);
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range_min
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= sb.sb_min_value_out + this->ss_cursor_column * column_size;
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range_max = range_min + column_size + column_size * 0.01;
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this->ss_value_source->spectro_mark((textview_curses&) lv,
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begin_time.tv_sec,
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end_time.tv_sec,
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range_min,
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range_max);
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this->invalidate();
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lv.reload_data();
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return true;
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}
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case KEY_LEFT:
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case KEY_RIGHT: {
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unsigned long width;
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vis_line_t height;
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string_attrs_t sa;
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this->ss_cursor_top = lv.get_top();
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lv.get_dimensions(height, width);
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this->text_attrs_for_line(
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(textview_curses&) lv, this->ss_cursor_top, sa);
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if (sa.empty()) {
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this->ss_cursor_column = -1;
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return true;
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}
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string_attrs_t::iterator current;
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struct line_range lr(this->ss_cursor_column,
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this->ss_cursor_column + 1);
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current = find_string_attr(sa, lr);
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if (current != sa.end()) {
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if (ch == KEY_LEFT) {
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if (current == sa.begin()) {
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current = sa.end();
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} else {
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--current;
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}
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} else {
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++current;
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}
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}
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if (current == sa.end()) {
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if (ch == KEY_LEFT) {
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current = sa.end();
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--current;
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} else {
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current = sa.begin();
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}
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}
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this->ss_cursor_column = current->sa_range.lr_start;
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lv.reload_data();
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return true;
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}
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default:
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return false;
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}
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}
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bool
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spectrogram_source::list_value_for_overlay(const listview_curses& lv,
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int y,
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int bottom,
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vis_line_t row,
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attr_line_t& value_out)
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{
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if (y != 0) {
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return false;
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}
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std::string& line = value_out.get_string();
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char buf[128];
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vis_line_t height;
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unsigned long width;
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lv.get_dimensions(height, width);
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this->cache_bounds();
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if (this->ss_cached_line_count == 0) {
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value_out.with_ansi_string(ANSI_ROLE("error: no log data"),
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role_t::VCR_ERROR);
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return true;
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}
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spectrogram_bounds& sb = this->ss_cached_bounds;
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spectrogram_thresholds& st = this->ss_cached_thresholds;
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snprintf(buf, sizeof(buf), "Min: %'.10lg", sb.sb_min_value_out);
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line = buf;
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snprintf(buf,
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sizeof(buf),
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ANSI_ROLE(" ") " 1-%'d " ANSI_ROLE(" ") " %'d-%'d " ANSI_ROLE(
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" ") " %'d+",
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role_t::VCR_LOW_THRESHOLD,
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st.st_green_threshold - 1,
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role_t::VCR_MED_THRESHOLD,
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st.st_green_threshold,
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st.st_yellow_threshold - 1,
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role_t::VCR_HIGH_THRESHOLD,
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st.st_yellow_threshold);
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line.append(width / 2 - strlen(buf) / 3 - line.length(), ' ');
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line.append(buf);
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scrub_ansi_string(line, value_out.get_attrs());
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snprintf(buf, sizeof(buf), "Max: %'.10lg", sb.sb_max_value_out);
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line.append(width - strlen(buf) - line.length() - 2, ' ');
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line.append(buf);
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value_out.with_attr(string_attr(line_range(0, -1),
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VC_STYLE.value(A_UNDERLINE)));
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return true;
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}
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size_t
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spectrogram_source::text_line_count()
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{
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if (this->ss_value_source == nullptr) {
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return 0;
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}
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this->cache_bounds();
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return this->ss_cached_line_count;
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}
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size_t
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spectrogram_source::text_line_width(textview_curses& tc)
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{
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if (tc.get_window() == nullptr) {
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return 80;
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}
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unsigned long width;
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vis_line_t height;
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tc.get_dimensions(height, width);
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return width;
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}
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nonstd::optional<struct timeval>
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spectrogram_source::time_for_row(vis_line_t row)
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{
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struct timeval retval {
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0, 0
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};
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this->cache_bounds();
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retval.tv_sec
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= rounddown(this->ss_cached_bounds.sb_begin_time, this->ss_granularity)
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+ row * this->ss_granularity;
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return retval;
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}
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nonstd::optional<vis_line_t>
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spectrogram_source::row_for_time(struct timeval time_bucket)
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{
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if (this->ss_value_source == nullptr) {
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return nonstd::nullopt;
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}
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time_t diff;
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int retval;
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this->cache_bounds();
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if (time_bucket.tv_sec < this->ss_cached_bounds.sb_begin_time) {
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return 0_vl;
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}
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diff = time_bucket.tv_sec - this->ss_cached_bounds.sb_begin_time;
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retval = diff / this->ss_granularity;
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return vis_line_t(retval);
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}
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void
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spectrogram_source::text_value_for_line(textview_curses& tc,
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int row,
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std::string& value_out,
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text_sub_source::line_flags_t flags)
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{
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spectrogram_row& s_row = this->load_row(tc, row);
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char tm_buffer[128];
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struct tm tm;
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auto row_time_opt = this->time_for_row(vis_line_t(row));
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if (!row_time_opt) {
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value_out.clear();
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return;
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}
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auto row_time = row_time_opt.value();
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gmtime_r(&row_time.tv_sec, &tm);
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strftime(tm_buffer, sizeof(tm_buffer), " %a %b %d %H:%M:%S", &tm);
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value_out = tm_buffer;
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value_out.resize(s_row.sr_width, ' ');
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for (size_t lpc = 0; lpc <= s_row.sr_width; lpc++) {
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if (s_row.sr_values[lpc].rb_marks) {
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value_out[lpc] = 'x';
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}
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}
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if (this->ss_cursor_top == row && this->ss_cursor_column != -1) {
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if (value_out[this->ss_cursor_column] == 'x') {
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value_out[this->ss_cursor_column] = '*';
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} else {
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value_out[this->ss_cursor_column] = '+';
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}
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}
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}
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void
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spectrogram_source::text_attrs_for_line(textview_curses& tc,
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int row,
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string_attrs_t& value_out)
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{
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if (this->ss_value_source == nullptr) {
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return;
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}
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view_colors& vc = view_colors::singleton();
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spectrogram_thresholds& st = this->ss_cached_thresholds;
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spectrogram_row& s_row = this->load_row(tc, row);
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for (int lpc = 0; lpc <= (int) s_row.sr_width; lpc++) {
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int col_value = s_row.sr_values[lpc].rb_counter;
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if (col_value == 0) {
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continue;
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}
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int color;
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if (col_value < st.st_green_threshold) {
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color = COLOR_GREEN;
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} else if (col_value < st.st_yellow_threshold) {
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color = COLOR_YELLOW;
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} else {
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color = COLOR_RED;
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}
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value_out.emplace_back(line_range(lpc, lpc + 1),
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VC_STYLE.value(
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vc.ansi_color_pair(COLOR_BLACK, color)));
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}
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}
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void
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spectrogram_source::cache_bounds()
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{
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if (this->ss_value_source == nullptr) {
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this->ss_cached_bounds.sb_count = 0;
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this->ss_cached_bounds.sb_begin_time = 0;
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return;
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}
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spectrogram_bounds sb;
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this->ss_value_source->spectro_bounds(sb);
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if (sb.sb_count == this->ss_cached_bounds.sb_count) {
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return;
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}
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this->ss_cached_bounds = sb;
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if (sb.sb_count == 0) {
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this->ss_cached_line_count = 0;
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return;
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}
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time_t grain_begin_time = rounddown(sb.sb_begin_time, this->ss_granularity);
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time_t grain_end_time = roundup_size(sb.sb_end_time, this->ss_granularity);
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time_t diff = std::max((time_t) 1, grain_end_time - grain_begin_time);
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this->ss_cached_line_count
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= (diff + this->ss_granularity - 1) / this->ss_granularity;
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int64_t samples_per_row = sb.sb_count / this->ss_cached_line_count;
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spectrogram_thresholds& st = this->ss_cached_thresholds;
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st.st_yellow_threshold = samples_per_row / 2;
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st.st_green_threshold = st.st_yellow_threshold / 2;
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if (st.st_green_threshold <= 1) {
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st.st_green_threshold = 2;
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}
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if (st.st_yellow_threshold <= st.st_green_threshold) {
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st.st_yellow_threshold = st.st_green_threshold + 1;
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}
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}
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spectrogram_row&
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spectrogram_source::load_row(textview_curses& tc, int row)
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{
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this->cache_bounds();
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unsigned long width;
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vis_line_t height;
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tc.get_dimensions(height, width);
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width -= 2;
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spectrogram_bounds& sb = this->ss_cached_bounds;
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spectrogram_request sr(sb);
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time_t row_time;
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sr.sr_width = width;
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row_time = rounddown(sb.sb_begin_time, this->ss_granularity)
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+ row * this->ss_granularity;
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sr.sr_begin_time = row_time;
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sr.sr_end_time = row_time + this->ss_granularity;
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sr.sr_column_size
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= (sb.sb_max_value_out - sb.sb_min_value_out) / (double) (width - 1);
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spectrogram_row& s_row = this->ss_row_cache[row_time];
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if (s_row.sr_values == nullptr || s_row.sr_width != width
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|| s_row.sr_column_size != sr.sr_column_size)
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{
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s_row.sr_width = width;
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s_row.sr_column_size = sr.sr_column_size;
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delete[] s_row.sr_values;
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s_row.sr_values = new spectrogram_row::row_bucket[width + 1];
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this->ss_value_source->spectro_row(sr, s_row);
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}
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return s_row;
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}
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