AUD_SndFileWriter.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * Copyright 2009-2011 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * Audaspace 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.
 *
 * AudaSpace 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 Audaspace; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "AUD_SndFileWriter.h"

#include <cstring>

static const char* fileopen_error = "AUD_SndFileWriter: File couldn't be written.";
static const char* format_error = "AUD_SndFileWriter: Unsupported format.";

AUD_SndFileWriter::AUD_SndFileWriter(std::string filename, AUD_DeviceSpecs specs,
                                     AUD_Container format, AUD_Codec codec, unsigned int bitrate) :
    m_specs(specs)
{
    SF_INFO sfinfo;

    sfinfo.channels = specs.channels;
    sfinfo.samplerate = int(specs.rate);

    switch(format)
    {
    case AUD_CONTAINER_FLAC:
        sfinfo.format = SF_FORMAT_FLAC;
        switch(specs.format)
        {
        case AUD_FORMAT_S16:
            sfinfo.format |= SF_FORMAT_PCM_16;
            break;
        case AUD_FORMAT_S24:
            sfinfo.format |= SF_FORMAT_PCM_24;
            break;
        case AUD_FORMAT_S32:
            sfinfo.format |= SF_FORMAT_PCM_32;
            break;
        case AUD_FORMAT_FLOAT32:
            sfinfo.format |= SF_FORMAT_FLOAT;
            break;
        case AUD_FORMAT_FLOAT64:
            sfinfo.format |= SF_FORMAT_DOUBLE;
            break;
        default:
            sfinfo.format = 0;
            break;
        }
        break;
    case AUD_CONTAINER_OGG:
        if(codec == AUD_CODEC_VORBIS)
            sfinfo.format = SF_FORMAT_OGG | SF_FORMAT_VORBIS;
        else
            sfinfo.format = 0;
        break;
    case AUD_CONTAINER_WAV:
        sfinfo.format = SF_FORMAT_WAV;
        switch(specs.format)
        {
        case AUD_FORMAT_U8:
            sfinfo.format |= SF_FORMAT_PCM_U8;
            break;
        case AUD_FORMAT_S16:
            sfinfo.format |= SF_FORMAT_PCM_16;
            break;
        case AUD_FORMAT_S24:
            sfinfo.format |= SF_FORMAT_PCM_24;
            break;
        case AUD_FORMAT_S32:
            sfinfo.format |= SF_FORMAT_PCM_32;
            break;
        case AUD_FORMAT_FLOAT32:
            sfinfo.format |= SF_FORMAT_FLOAT;
            break;
        case AUD_FORMAT_FLOAT64:
            sfinfo.format |= SF_FORMAT_DOUBLE;
            break;
        default:
            sfinfo.format = 0;
            break;
        }
        break;
    default:
        sfinfo.format = 0;
        break;
    }

    if(sfinfo.format == 0)
        AUD_THROW(AUD_ERROR_SPECS, format_error);

    m_sndfile = sf_open(filename.c_str(), SFM_WRITE, &sfinfo);

    if(!m_sndfile)
        AUD_THROW(AUD_ERROR_FILE, fileopen_error);
}

AUD_SndFileWriter::~AUD_SndFileWriter()
{
    sf_close(m_sndfile);
}

int AUD_SndFileWriter::getPosition() const
{
    return m_position;
}

AUD_DeviceSpecs AUD_SndFileWriter::getSpecs() const
{
    return m_specs;
}

void AUD_SndFileWriter::write(unsigned int length, sample_t* buffer)
{
    length = sf_writef_float(m_sndfile, buffer, length);

    m_position += length;
}