/*

  synth_8bit.h: Wrappers over optimized synth_xtoy for converting signed short to 8bit.

  copyright 1995-2008 by the mpg123 project - free software under the terms of the LGPL 2.1

  see COPYING and AUTHORS files in distribution or http://mpg123.org

  initially written by Michael Hipp, code generalized to the wrapper by Thomas Orgis

  Only variable is the BLOCK size to choose 1to1, 2to1 or 4to1.

  Oh, and the names: BASE_SYNTH_NAME, SYNTH_NAME, MONO_NAME, MONO2STEREO_NAME

  (p.ex. opt_synth_1to1(fr), INT123_synth_1to1_8bit, INT123_synth_1to1_8bit_mono, ...).

*/

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

{

  short samples_tmp[BLOCK];

  short *tmp1 = samples_tmp + channel;

  int i,ret;

  unsigned char *samples = fr->buffer.data;

  int pnt = fr->buffer.fill;

  fr->buffer.data = (unsigned char*) samples_tmp;

  fr->buffer.fill = 0;

  ret = BASE_SYNTH_NAME(bandPtr, channel, fr , 0);

  fr->buffer.data = samples;

  samples += channel + pnt;

  for(i=0;i<(BLOCK/2);i++)

  {

    *samples = fr->conv16to8[*tmp1>>AUSHIFT];

    samples += 2;

    tmp1 += 2;

  }

  fr->buffer.fill = pnt + (final ? BLOCK : 0 );

  return ret;

}

int MONO_NAME(real *bandPtr, mpg123_handle *fr)

{

  short samples_tmp[BLOCK];

  short *tmp1 = samples_tmp;

  int i,ret;

  unsigned char *samples = fr->buffer.data;

  int pnt = fr->buffer.fill;

  fr->buffer.data = (unsigned char*) samples_tmp;

  fr->buffer.fill = 0;

  ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0);

  fr->buffer.data = samples;

  samples += pnt;

  for(i=0;i<(BLOCK/2);i++)

  {

    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];

    tmp1+=2;

  }

  fr->buffer.fill = pnt + BLOCK/2;

  return ret;

}

int MONO2STEREO_NAME(real *bandPtr, mpg123_handle *fr)

{

  short samples_tmp[BLOCK];

  short *tmp1 = samples_tmp;

  int i,ret;

  unsigned char *samples = fr->buffer.data;

  int pnt = fr->buffer.fill;

  fr->buffer.data = (unsigned char*) samples_tmp;

  fr->buffer.fill = 0;

  ret = BASE_SYNTH_NAME(bandPtr, 0, fr, 0);

  fr->buffer.data = samples;

  samples += pnt;

  for(i=0;i<(BLOCK/2);i++)

  {

    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];

    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];

    tmp1 += 2;

  }

  fr->buffer.fill = pnt + BLOCK;

  return ret;

}