/*
 * mp3plot - Bitrate analysis tool
 *
 * Copyright (C) 2007 Toni Corvera
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

// $Id: mp3_console_plotter.cc 749 2007-05-24 22:44:28Z  $

#include <iostream>
#include <string>

#include <boost/shared_ptr.hpp>

#include "config.h" // PLOT_SYMBOL
#include "str_utils.h"
#include "mp3_console_plotter.h"

using std::cout;
using std::endl;
using std::string;

namespace net_outlyer {

namespace mp3 {

namespace str = str_utils;

// static
void console_plotter::register_me() {
    boost::shared_ptr<bitrate_plotter> p(new console_plotter());
    bitrate_plotter::register_plotter( bitrate_plotter::TEXT, p );
}

// Register the console plotter
// It's always available

void console_plotter::plot(const mp3file & file) const {
    const bitrate_distribution & dist = file.get_br_distribution();

    // Max length of bitrate tags
    static const size_t LBR = string("invalid").length();
    // Max length of number of frames, + padding
    const size_t LOC = str::to_string(dist.max).length() + 1;

    // Console width
    // FIXME: detect
    const uint16_t CONWIDTH = 80;
    // 4 = "[]: " + 1 => space between number of frames and dots
    // using float because a cast would be made anyway
    const float AVAIL = CONWIDTH - (LBR + LOC + 5);

    uint32_t sum=0, fs=0;
    float sumbrs=.0;

    for (bitrate_distribution::const_iterator b_it = dist.begin();
         b_it != dist.end();
         ++b_it)
    {
        const bitrate_t br = b_it->first;
        const numframes_t nf = b_it->second;

        const string & s_br = str::pad( str::to_string(br) + "kbps", LBR, " ", str::PAD_LEFT );
        const string & s_nf = str::pad( str::to_string(nf), LOC );

        cout << "[" << s_br << "]: " << s_nf;

        // the scale is relative to the max
        const int SCALED = int(nf * AVAIL / dist.max);
        cout << str::pad("", SCALED, PLOT_SYMBOL);

        cout << "\n";

        sum += nf; // number of frames of this bitrate
        sumbrs += (nf * br);
        // That's the number of bits per seconds at this bitrate
        const uint32_t secbits = nf * br * 1000;
        // Each frame is 0.026 seconds long
        fs+=int( secbits * 0.026);
    }
    { // Finally print the invalid frames
        cout << "[invalid]: " << dist.bad_frames();
        /*
        const int SCALED = int(br_dist.bad_frames() * AVAIL / br_dist.max);
        cout << str::pad("", SCALED, PLOT_SYMBOL);
        */
        cout << "\n";
    }

    string abr = str::to_string(sumbrs/sum);
    const string::size_type dotidx = abr.find_first_of('.');
    if (string::npos != dotidx) {
        if ((dotidx + 3) < abr.length()) {
            abr.erase(dotidx+3);
        }
    }

    cout << "Average bitrate is " << abr << " kbps\n";
    cout << "\twith a total of " << sum << " frames" << endl;
    cout << "\twhich yields a theoretical (audio data) size of "
         << (fs / 8) << " bytes" << endl;
}

} // namespace mp3

} // namespace net_outlyer

/* vim:set ts=4 et ai: */