sndfile_helpers.cc

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/*
    Copyright (C) 2000-2007 Paul Davis

    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.

*/

#ifndef COMPILER_MSVC
#include <strings.h>
#endif
#include <map>

#include <sndfile.h>
#include "ardour/sndfile_helpers.h"

#include "i18n.h"

using std::map;
using namespace std;

const char * const sndfile_header_formats_strings[SNDFILE_HEADER_FORMATS+1] = {
        N_("WAV"),
        N_("AIFF"),
        N_("CAF"),
        N_("W64 (64 bit WAV)"),
        N_("FLAC"),
        N_("Ogg/Vorbis"),
        N_("raw (no header)"),
        0
};

const char* const sndfile_file_endings_strings[SNDFILE_HEADER_FORMATS+1] = {
        N_(".wav"),
        N_(".aiff"),
        N_(".caf"),
        N_(".w64"),
        N_(".flac"),
        N_(".ogg"),
        N_(".raw"),
        0
};

int sndfile_header_formats[SNDFILE_HEADER_FORMATS] = {
        SF_FORMAT_WAV,
        SF_FORMAT_AIFF,
        SF_FORMAT_CAF,
        SF_FORMAT_W64,
        SF_FORMAT_FLAC,
        SF_FORMAT_OGG,
        SF_FORMAT_RAW
};

const char * const sndfile_bitdepth_formats_strings[SNDFILE_BITDEPTH_FORMATS+1] = {
        N_("Signed 16 bit PCM"),
        N_("Signed 24 bit PCM"),
        N_("Signed 32 bit PCM"),
        N_("Signed 8 bit PCM"),
        N_("32 bit float"),
        0
};

int sndfile_bitdepth_formats[SNDFILE_BITDEPTH_FORMATS] = {
        SF_FORMAT_PCM_16,
        SF_FORMAT_PCM_24,
        SF_FORMAT_PCM_32,
        SF_FORMAT_PCM_S8,
        SF_FORMAT_FLOAT
};

const char * const sndfile_endian_formats_strings[SNDFILE_ENDIAN_FORMATS+1] = {
        N_("Little-endian (Intel)"),
        N_("Big-endian (PowerPC)"),
        0
};

int sndfile_endian_formats[SNDFILE_ENDIAN_FORMATS] = {
        SF_ENDIAN_LITTLE,
        SF_ENDIAN_BIG
};

int
sndfile_header_format_by_index (int index)
{
        if (index >= 0 && index < SNDFILE_HEADER_FORMATS) {
                return sndfile_header_formats[index];
        }
        return -1;
}

int
sndfile_bitdepth_format_by_index (int index)
{
        if (index >= 0 && index < SNDFILE_BITDEPTH_FORMATS) {
                return sndfile_bitdepth_formats[index];
        }
        return -1;
}

int
sndfile_endian_format_by_index (int index)
{
        if (index >= 0 && index < SNDFILE_ENDIAN_FORMATS) {
                return sndfile_endian_formats[index];
        }
        return -1;
}

int
sndfile_data_width (int format)
{
        int tval = format & 0xf;

        switch (tval) {
        case SF_FORMAT_PCM_S8:
        case SF_FORMAT_PCM_U8:
                return 8;
        case SF_FORMAT_PCM_16:
                return 16;
        case SF_FORMAT_PCM_24:
                return 24;
        case SF_FORMAT_PCM_32:
                return 32;
        case SF_FORMAT_FLOAT:
                return 1; /* ridiculous but used as a magic value */
        default:
                // we don't handle anything else within ardour
                return 0;
        }
}

string
sndfile_major_format(int format)
{
        static map<int, string> m;

        if(m.empty()){
                SF_FORMAT_INFO format_info;
                int count;
                sf_command(0, SFC_GET_FORMAT_MAJOR_COUNT, &count, sizeof (int));
                for (int i = 0; i < count; ++i){
                        format_info.format = i;
                        sf_command (0, SFC_GET_FORMAT_MAJOR,
                                        &format_info, sizeof (format_info));
                        m[format_info.format & SF_FORMAT_TYPEMASK] = format_info.name;

                        /* normalize a couple of names rather than use what libsndfile gives us */

                        if (strncasecmp (format_info.name, "OGG", 3) == 0) {
                                m[format_info.format & SF_FORMAT_TYPEMASK] = "Ogg";
                        } else if (strncasecmp (format_info.name, "WAV", 3) == 0) {
                                m[format_info.format & SF_FORMAT_TYPEMASK] = "WAV";
                        } else {
                                m[format_info.format & SF_FORMAT_TYPEMASK] = format_info.name;
                        }
                }
        }

        map<int, string>::iterator p = m.find(format & SF_FORMAT_TYPEMASK);
        if(p != m.end()){
                return m[format & SF_FORMAT_TYPEMASK];
        } else {
                return "-Unknown-";
        }
}

string
sndfile_minor_format(int format)
{
        static map<int, string> m;

        if(m.empty()){
                SF_FORMAT_INFO format_info;
                int count;
                sf_command(0, SFC_GET_FORMAT_SUBTYPE_COUNT, &count, sizeof (int));
                for (int i = 0; i < count; ++i){
                        format_info.format = i;
                        sf_command (0, SFC_GET_FORMAT_SUBTYPE,
                                        &format_info, sizeof (format_info));
                        m[format_info.format & SF_FORMAT_SUBMASK] = format_info.name;
                }
        }

        map<int, string>::iterator p = m.find(format & SF_FORMAT_SUBMASK);
        if(p != m.end()){
                return m[format & SF_FORMAT_SUBMASK];
        } else {
                return "-Unknown-";
        }
}