synth_ntom.h File Reference

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Functions
int	MONO_NAME (real *bandPtr, mpg123_handle *fr)
int	MONO2STEREO_NAME (real *bandPtr, mpg123_handle *fr)
int	SYNTH_NAME (real *bandPtr, int channel, mpg123_handle *fr, int final)

Function Documentation

MONO2STEREO_NAME()

int MONO2STEREO_NAME	(	real *	bandPtr,
		mpg123_handle *	fr
	)

Definition at line 47 of file synth_ntom.h.

{
    size_t i;
    int ret;
    size_t pnt1 = fr->buffer.fill;
    unsigned char *samples = fr->buffer.data + pnt1;

    ret = SYNTH_NAME(bandPtr, 0, fr, 1);

    for(i=0;i<((fr->buffer.fill-pnt1)/(2*sizeof(SAMPLE_T)));i++)
    {
        ((SAMPLE_T *)samples)[1] = ((SAMPLE_T *)samples)[0];
        samples+=2*sizeof(SAMPLE_T);
    }

    return ret;
}

MONO_NAME()

int MONO_NAME	(	real *	bandPtr,
		mpg123_handle *	fr
	)

Definition at line 20 of file synth_ntom.h.

{
    SAMPLE_T samples_tmp[8*64];
    SAMPLE_T *tmp1 = samples_tmp;
    size_t i;
    int ret;

    size_t pnt = fr->buffer.fill;
    unsigned char *samples = fr->buffer.data;
    fr->buffer.data = (unsigned char*) samples_tmp;
    fr->buffer.fill = 0;
    ret = SYNTH_NAME(bandPtr, 0, fr, 1);
    fr->buffer.data = samples;

    samples += pnt;
    for(i=0;i<(fr->buffer.fill/(2*sizeof(SAMPLE_T)));i++)
    {
        *( (SAMPLE_T *)samples) = *tmp1;
        samples += sizeof(SAMPLE_T);
        tmp1 += 2;
    }
    fr->buffer.fill = pnt + (fr->buffer.fill/2);

    return ret;
}

SYNTH_NAME()

int SYNTH_NAME	(	real *	bandPtr,
		int	channel,
		mpg123_handle *	fr,
		int	final
	)

Definition at line 66 of file synth_ntom.h.

{
    static const int step = 2;
    SAMPLE_T *samples = (SAMPLE_T *) (fr->buffer.data + fr->buffer.fill);

    real *b0, **buf; /* (*buf)[0x110]; */
    int clip = 0;
    int bo1;
    int ntom;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings) do_equalizer(bandPtr,channel,fr->equalizer);
#endif
    if(!channel)
    {
        fr->bo--;
        fr->bo &= 0xf;
        buf = fr->real_buffs[0];
        ntom = fr->ntom_val[1] = fr->ntom_val[0];
    }
    else
    {
        samples++;
        buf = fr->real_buffs[1];
        ntom = fr->ntom_val[1];
    }

    if(fr->bo & 0x1)
    {
        b0 = buf[0];
        bo1 = fr->bo;
        dct64(buf[1]+((fr->bo+1)&0xf),buf[0]+fr->bo,bandPtr);
    }
    else
    {
        b0 = buf[1];
        bo1 = fr->bo+1;
        dct64(buf[0]+fr->bo,buf[1]+fr->bo+1,bandPtr);
    }

    {
        register int j;
        real *window = fr->decwin + 16 - bo1;

        for (j=16;j;j--,window+=0x10)
        {
            real sum;

            ntom += fr->ntom_step;
            if(ntom < NTOM_MUL)
            {
                window += 16;
                b0 += 16;
                continue;
            }

            sum  = REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);
            sum += REAL_MUL_SYNTH(*window++, *b0++);
            sum -= REAL_MUL_SYNTH(*window++, *b0++);

            while(ntom >= NTOM_MUL)
            {
                WRITE_SAMPLE(samples,sum,clip);
                samples += step;
                ntom -= NTOM_MUL;
            }
        }

        ntom += fr->ntom_step;
        if(ntom >= NTOM_MUL)
        {
            real sum;
            sum  = REAL_MUL_SYNTH(window[0x0], b0[0x0]);
            sum += REAL_MUL_SYNTH(window[0x2], b0[0x2]);
            sum += REAL_MUL_SYNTH(window[0x4], b0[0x4]);
            sum += REAL_MUL_SYNTH(window[0x6], b0[0x6]);
            sum += REAL_MUL_SYNTH(window[0x8], b0[0x8]);
            sum += REAL_MUL_SYNTH(window[0xA], b0[0xA]);
            sum += REAL_MUL_SYNTH(window[0xC], b0[0xC]);
            sum += REAL_MUL_SYNTH(window[0xE], b0[0xE]);

            while(ntom >= NTOM_MUL)
            {
                WRITE_SAMPLE(samples,sum,clip);
                samples += step;
                ntom -= NTOM_MUL;
            }
        }

        b0-=0x10,window-=0x20;
        window += bo1<<1;

        for (j=15;j;j--,b0-=0x20,window-=0x10)
        {
            real sum;

            ntom += fr->ntom_step;
            if(ntom < NTOM_MUL)
            {
                window -= 16;
                b0 += 16;
                continue;
            }

            sum = REAL_MUL_SYNTH(-*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);
            sum -= REAL_MUL_SYNTH(*(--window), *b0++);

            while(ntom >= NTOM_MUL)
            {
                WRITE_SAMPLE(samples,sum,clip);
                samples += step;
                ntom -= NTOM_MUL;
            }
        }
    }

    fr->ntom_val[channel] = ntom;
    if(final) fr->buffer.fill = ((unsigned char *) samples - fr->buffer.data - (channel ? sizeof(SAMPLE_T) : 0));

    return clip;
}

Referenced by MONO2STEREO_NAME(), and MONO_NAME().