export_format_base.cc

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/*
    Copyright (C) 2008 Paul Davis
    Author: Sakari Bergen

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "ardour/export_format_base.h"

namespace ARDOUR
{

void
ExportFormatBase::SelectableCompatible::set_selected (bool value)
{
        if (_selected != value) {
                _selected = value;
                SelectChanged (value);
        }
}

void
ExportFormatBase::SelectableCompatible::set_compatible (bool value)
{
        if (_compatible != value) {
                _compatible = value;
                CompatibleChanged (value);
        }
        if (!value) {
                set_selected (false);
        }
}

ExportFormatBase::ExportFormatBase ()
{

}

ExportFormatBase::ExportFormatBase (ExportFormatBase const & other) :
  sample_formats (other.sample_formats),
  endiannesses (other.endiannesses),
  sample_rates (other.sample_rates),
  format_ids (other.format_ids),
  qualities (other.qualities)
{

}

ExportFormatBase::~ExportFormatBase ()
{

}

boost::shared_ptr<ExportFormatBase>
ExportFormatBase::get_intersection (ExportFormatBase const & other) const
{
        return do_set_operation (other, SetIntersection);
}

boost::shared_ptr<ExportFormatBase>
ExportFormatBase::get_union (ExportFormatBase const & other) const
{
        return do_set_operation (other, SetUnion);
}

boost::shared_ptr<ExportFormatBase>
ExportFormatBase::do_set_operation (ExportFormatBase const & other, SetOperation operation) const
{
        boost::shared_ptr<ExportFormatBase> result (new ExportFormatBase ());

        /* Sets */

        // Endiannesses
        {
                EndianSet::const_iterator start1 = endiannesses.begin();
                EndianSet::const_iterator end1 = endiannesses.end();
                EndianSet::const_iterator start2 = other.endiannesses.begin();
                EndianSet::const_iterator end2 = other.endiannesses.end();
                std::insert_iterator<EndianSet> insert (result->endiannesses, result->endiannesses.begin());

                switch (operation) {
                  case SetIntersection:
                        std::set_intersection (start1, end1, start2, end2, insert);
                        break;
                  case SetUnion:
                        std::set_union (start1, end1, start2, end2, insert);
                        break;
                }
        }

        // Sample formats
        {
                SampleFormatSet::const_iterator start1 = sample_formats.begin();
                SampleFormatSet::const_iterator end1 = sample_formats.end();
                SampleFormatSet::const_iterator start2 = other.sample_formats.begin();
                SampleFormatSet::const_iterator end2 = other.sample_formats.end();
                std::insert_iterator<SampleFormatSet> insert (result->sample_formats, result->sample_formats.begin());

                switch (operation) {
                  case SetIntersection:
                        std::set_intersection (start1, end1, start2, end2, insert);
                        break;
                  case SetUnion:
                        std::set_union (start1, end1, start2, end2, insert);
                        break;
                }
        }


        // Sample rates
        {
                SampleRateSet::const_iterator start1 = sample_rates.begin();
                SampleRateSet::const_iterator end1 = sample_rates.end();
                SampleRateSet::const_iterator start2 = other.sample_rates.begin();
                SampleRateSet::const_iterator end2 = other.sample_rates.end();
                std::insert_iterator<SampleRateSet> insert (result->sample_rates, result->sample_rates.begin());

                switch (operation) {
                  case SetIntersection:
                        std::set_intersection (start1, end1, start2, end2, insert);
                        break;
                  case SetUnion:
                        std::set_union (start1, end1, start2, end2, insert);
                        break;
                }
        }

        // Format ids
        {
                FormatSet::const_iterator start1 = format_ids.begin();
                FormatSet::const_iterator end1 = format_ids.end();
                FormatSet::const_iterator start2 = other.format_ids.begin();
                FormatSet::const_iterator end2 = other.format_ids.end();
                std::insert_iterator<FormatSet> insert (result->format_ids, result->format_ids.begin());

                switch (operation) {
                  case SetIntersection:
                        std::set_intersection (start1, end1, start2, end2, insert);
                        break;
                  case SetUnion:
                        std::set_union (start1, end1, start2, end2, insert);
                        break;
                }
        }

        // Qualities
        {
                QualitySet::const_iterator start1 = qualities.begin();
                QualitySet::const_iterator end1 = qualities.end();
                QualitySet::const_iterator start2 = other.qualities.begin();
                QualitySet::const_iterator end2 = other.qualities.end();
                std::insert_iterator<QualitySet> insert (result->qualities, result->qualities.begin());

                switch (operation) {
                  case SetIntersection:
                        std::set_intersection (start1, end1, start2, end2, insert);
                        break;
                  case SetUnion:
                        std::set_union (start1, end1, start2, end2, insert);
                        break;
                }
        }

        return result;
}

ExportFormatBase::SampleRate
ExportFormatBase::nearest_sample_rate (framecnt_t sample_rate)
{
        int diff = 0;
        int smallest_diff = INT_MAX;
        SampleRate best_match = SR_None;

        #define DO_SR_COMPARISON(rate) \
        diff = std::fabs((double)((rate) - sample_rate)); \
        if(diff < smallest_diff) { \
                smallest_diff = diff; \
                best_match = (rate); \
        }

        DO_SR_COMPARISON(SR_8);
        DO_SR_COMPARISON(SR_22_05);
        DO_SR_COMPARISON(SR_44_1);
        DO_SR_COMPARISON(SR_48);
        DO_SR_COMPARISON(SR_88_2);
        DO_SR_COMPARISON(SR_96);
        DO_SR_COMPARISON(SR_192);

        return best_match;
        #undef DO_SR_COMPARISON
}

}; // namespace ARDOUR