qmmp - Qmmp with Jyrki's patches

path: root/src/plugins/CommandLineOptions/SeekOption/seekoption.cpp

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Diffstat (limited to 'src/plugins/CommandLineOptions/SeekOption/seekoption.cpp')

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/***************************************************************************
 *   Copyright (C) 2006 by Ilya Kotov                                      *
 *   forkotov02@hotmail.ru                                                 *
 *                                                                         *
 *   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.             *
 ***************************************************************************/


#include <QObject>
#include <QIODevice>

#include "constants.h"
#include "buffer.h"
#include "output.h"
#include "recycler.h"

#include "decoder_mpc.h"

// this function used from xmms
inline static void copyBuffer(MPC_SAMPLE_FORMAT* pInBuf, char* pOutBuf, unsigned pLength)
{
    unsigned pSize = 16;
    int clipMin    = -1 << (pSize - 1);
    int clipMax    = (1 << (pSize - 1)) - 1;
    int floatScale =  1 << (pSize - 1);
    for (unsigned n = 0; n < 2 * pLength; n++)
    {
        int val;
#ifdef MPC_FIXED_POINT
        val = shiftSigned(pInBuf[n], pSize - MPC_FIXED_POINT_SCALE_SHIFT);
#else
        val = (int) (pInBuf[n] * floatScale);
#endif
        if (val < clipMin)
            val = clipMin;
        else if (val > clipMax)
            val = clipMax;
        unsigned shift = 0;
        do
        {
            pOutBuf[n * 2 + (shift / 8)] = (unsigned char) ((val >> shift) & 0xFF);
            shift += 8;
        }
        while (shift < pSize);
    }
}

// mpc callbacks

static mpc_int32_t mpc_callback_read (void *data, void *buffer, mpc_int32_t size)
{
    DecoderMPC *dmpc = (DecoderMPC *) data;
    qint64 res;

    res = dmpc->input()->read((char *)buffer, size);

    return res;
}

static mpc_bool_t mpc_callback_seek (void *data, mpc_int32_t offset)
{
    DecoderMPC *dmpc = (DecoderMPC *) data;

    return dmpc->input()->seek(offset); // ? TRUE : FALSE;
}

static mpc_int32_t mpc_callback_tell (void *data)
{
    DecoderMPC *dmpc = (DecoderMPC *) data;
    return dmpc->input()->pos ();
}

static mpc_bool_t  mpc_callback_canseek (void *data)
{
    DecoderMPC *dmpc = (DecoderMPC *) data;
    return !dmpc->input()->isSequential () ;
}

static mpc_int32_t mpc_callback_get_size (void *data)
{
    DecoderMPC *dmpc = (DecoderMPC *) data;
    return dmpc->input()->size();
}

// Decoder class

DecoderMPC::DecoderMPC(QObject *parent, DecoderFactory *d, QIODevice *i, Output *o)
        : Decoder(parent, d, i, o)
{
    inited = FALSE;
    user_stop = FALSE;
    stat = 0;
    output_buf = 0;
    output_bytes = 0;
    output_at = 0;
    bks = 0;
    done = FALSE;
    finish = FALSE;
    len = 0;
    freq = 0;
    bitrate = 0;
    seekTime = -1.0;
    totalTime = 0.0;
    chan = 0;
    output_size = 0;
    m_data = 0;




}


DecoderMPC::~DecoderMPC()
{
    deinit();
    if(data())
    {
        delete data();
        m_data = 0;
    }
    if (output_buf)
        delete [] output_buf;
    output_buf = 0;
}


void DecoderMPC::stop()
{
    user_stop = TRUE;
}


void DecoderMPC::flush(bool final)
{
    ulong min = final ? 0 : bks;

    while ((! done && ! finish) && output_bytes > min)
    {
        output()->recycler()->mutex()->lock ();

        while ((! done && ! finish) && output()->recycler()->full())
        {
            mutex()->unlock();

            output()->recycler()->cond()->wait(output()->recycler()->mutex());

            mutex()->lock ();
            done = user_stop;
        }

        if (user_stop || finish)
        {
            inited = FALSE;
            done = TRUE;
        }
        else
        {
            output_bytes -= produceSound(output_buf, output_bytes, bitrate, chan);
            output_size += bks;
            output_at = output_bytes;
        }

        if (output()->recycler()->full())
        {
            output()->recycler()->cond()->wakeOne();
        }

        output()->recycler()->mutex()->unlock();
    }
}


bool DecoderMPC::initialize()
{
    bks = blockSize();
    inited = user_stop = done = finish = FALSE;
    len = freq = bitrate = 0;
    stat = chan = 0;
    output_size = 0;
    seekTime = -1.0;


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