AUD_FileWriter.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 *****
 */

#ifdef WITH_FFMPEG
// needed for INT64_C
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#include "AUD_FFMPEGWriter.h"
#endif

#ifdef WITH_SNDFILE
#include "AUD_SndFileWriter.h"
#endif

#include "AUD_FileWriter.h"
#include "AUD_Buffer.h"

static const char* write_error = "AUD_FileWriter: File couldn't be written.";

AUD_Reference<AUD_IWriter> AUD_FileWriter::createWriter(std::string filename,AUD_DeviceSpecs specs,
                                                        AUD_Container format, AUD_Codec codec, unsigned int bitrate)
{
#ifdef WITH_SNDFILE
    try
    {
        return new AUD_SndFileWriter(filename, specs, format, codec, bitrate);
    }
    catch(AUD_Exception&) {}
#endif

#ifdef WITH_FFMPEG
    try
    {
        return new AUD_FFMPEGWriter(filename, specs, format, codec, bitrate);
    }
    catch(AUD_Exception&) {}
#endif

    AUD_THROW(AUD_ERROR_SPECS, write_error);
}

void AUD_FileWriter::writeReader(AUD_Reference<AUD_IReader> reader, AUD_Reference<AUD_IWriter> writer, unsigned int length, unsigned int buffersize)
{
    AUD_Buffer buffer(buffersize * AUD_SAMPLE_SIZE(writer->getSpecs()));
    sample_t* buf = buffer.getBuffer();

    int len;
    bool eos = false;
    int channels = writer->getSpecs().channels;

    for(unsigned int pos = 0; ((pos < length) || (length <= 0)) && !eos; pos += len)
    {
        len = buffersize;
        if((len > length - pos) && (length > 0))
            len = length - pos;
        reader->read(len, eos, buf);

        for(int i = 0; i < len * channels; i++)
        {
            // clamping!
            if(buf[i] > 1)
                buf[i] = 1;
            else if(buf[i] < -1)
                buf[i] = -1;
        }

        writer->write(len, buf);
    }
}