/*

synth_8bit.c: The functions for synthesizing 8bit samples, at the end of decoding.

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, heavily dissected and rearranged by Thomas Orgis

*/

#include "mpg123lib_intern.h"

#include "sample.h"

#include "debug.h"

/*

Part 2: All synth functions that produce 8bit output.

What we need is just a special WRITE_SAMPLE. For the generic and i386 functions, that is.

For the rather optimized synth_1to1, we will need the postprocessing 8bit converters from synth_8bit.h .

*/

#define SAMPLE_T unsigned char

#define WRITE_SAMPLE(samples,sum,clip) WRITE_8BIT_SAMPLE(samples,sum,clip)

/* Part 2a: All straight 1to1 decoding functions */

#define BLOCK 0x40 /* One decoding block is 64 samples. */

#define SYNTH_NAME synth_1to1_8bit

#include "synth.h"

#undef SYNTH_NAME

/* Mono-related synths; they wrap over _some_ synth_1to1_8bit (could be generic, could be i386). */

#define SYNTH_NAME fr->synths.plain[r_1to1][f_8]

#define MONO_NAME synth_1to1_8bit_mono

#define MONO2STEREO_NAME synth_1to1_8bit_m2s

#include "synth_mono.h"

#undef SYNTH_NAME

#undef MONO_NAME

#undef MONO2STEREO_NAME

#ifdef OPT_X86

#define NO_AUTOINCREMENT

#define SYNTH_NAME synth_1to1_8bit_i386

#include "synth.h"

#undef SYNTH_NAME

/* i386 uses the normal mono functions. */

#undef NO_AUTOINCREMENT

#endif

/* But now, we need functions that take the 16bit output of optimized synth_1to1 and convert it.

I suppose that is still faster than dropping the optimization altogether! */

#define BASE_SYNTH_NAME fr->synths.plain[r_1to1][f_16]

#define SYNTH_NAME synth_1to1_8bit_wrap

#define MONO_NAME synth_1to1_8bit_wrap_mono

#define MONO2STEREO_NAME synth_1to1_8bit_wrap_m2s

#include "synth_8bit.h"

#undef BASE_SYNTH_NAME

#undef SYNTH_NAME

#undef MONO_NAME

#undef MONO2STEREO_NAME

#undef BLOCK

#ifndef NO_DOWNSAMPLE

/*

Part 2b: 2to1 synth. Only generic and i386.

*/

#define BLOCK 0x20 /* One decoding block is 32 samples. */

#define SYNTH_NAME synth_2to1_8bit

#include "synth.h"

#undef SYNTH_NAME

/* Mono-related synths; they wrap over _some_ synth_2to1_8bit (could be generic, could be i386). */

#define SYNTH_NAME fr->synths.plain[r_2to1][f_8]

#define MONO_NAME synth_2to1_8bit_mono

#define MONO2STEREO_NAME synth_2to1_8bit_m2s

#include "synth_mono.h"

#undef SYNTH_NAME

#undef MONO_NAME

#undef MONO2STEREO_NAME

#ifdef OPT_X86

#define NO_AUTOINCREMENT

#define SYNTH_NAME synth_2to1_8bit_i386

#include "synth.h"

#undef SYNTH_NAME

/* i386 uses the normal mono functions. */

#undef NO_AUTOINCREMENT

#endif

#undef BLOCK

/*

Part 2c: 4to1 synth. Only generic and i386.

*/

#define BLOCK 0x10 /* One decoding block is 16 samples. */

#define SYNTH_NAME synth_4to1_8bit

#include "synth.h"

#undef SYNTH_NAME

/* Mono-related synths; they wrap over _some_ synth_4to1_8bit (could be generic, could be i386). */

#define SYNTH_NAME fr->synths.plain[r_4to1][f_8]

#define MONO_NAME synth_4to1_8bit_mono

#define MONO2STEREO_NAME synth_4to1_8bit_m2s

#include "synth_mono.h"

#undef SYNTH_NAME

#undef MONO_NAME

#undef MONO2STEREO_NAME

#ifdef OPT_X86

#define NO_AUTOINCREMENT

#define SYNTH_NAME synth_4to1_8bit_i386

#include "synth.h"

#undef SYNTH_NAME

/* i386 uses the normal mono functions. */

#undef NO_AUTOINCREMENT

#endif

#undef BLOCK

#endif /* NO_DOWNSAMPLE */

#ifndef NO_NTOM

/*

Part 2d: ntom synth.

Same procedure as above... Just no extra play anymore, straight synth that may use an optimized dct64.

*/

/* These are all in one header, there's no flexibility to gain. */

#define SYNTH_NAME synth_ntom_8bit

#define MONO_NAME synth_ntom_8bit_mono

#define MONO2STEREO_NAME synth_ntom_8bit_m2s

#include "synth_ntom.h"

#undef SYNTH_NAME

#undef MONO_NAME

#undef MONO2STEREO_NAME

#endif

#undef SAMPLE_T

#undef WRITE_SAMPLE