/*

	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), synth_1to1_8bit, 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;

}