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/*
* madplay - MPEG audio decoder and player
* Copyright (C) 2000-2004 Robert Leslie
*
* 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
*
* $Id: audio_hex.c,v 1.23 2004/01/23 09:41:31 rob Exp $
*/
# ifdef HAVE_CONFIG_H
# include "config.h"
# endif
# include "global.h"
# include <stdio.h>
# include <string.h>
# include <mad.h>
# include "audio.h"
static FILE *outfile;
static unsigned int bitdepth;
static char format_str[7];
static
int init(struct audio_init *init)
{
if (init->path && strcmp(init->path, "-") != 0) {
outfile = fopen(init->path, "w");
if (outfile == 0) {
audio_error = ":";
return -1;
}
}
else
outfile = stdout;
return 0;
}
static
int config(struct audio_config *config)
{
bitdepth = config->precision & ~3;
if (bitdepth == 0 || bitdepth > 24)
bitdepth = 24;
config->precision = bitdepth;
sprintf(format_str, "%%0%1ulX\n", bitdepth / 4);
fprintf(outfile, "# %u channel%s, %u Hz, %u-bit samples\n",
config->channels, config->channels == 1 ? "" : "s",
config->speed, config->precision);
return 0;
}
static
int play(struct audio_play *play)
{
unsigned int len;
mad_fixed_t const *left, *right;
unsigned long mask;
len = play->nsamples;
left = play->samples[0];
right = play->samples[1];
mask = (1L << bitdepth) - 1;
switch (play->mode) {
case AUDIO_MODE_ROUND:
while (len--) {
fprintf(outfile, format_str,
audio_linear_round(bitdepth, *left++, play->stats) & mask);
if (right) {
fprintf(outfile, format_str,
audio_linear_round(bitdepth, *right++, play->stats) & mask);
}
}
break;
case AUDIO_MODE_DITHER:
{
static struct audio_dither left_dither, right_dither;
while (len--) {
fprintf(outfile, format_str,
audio_linear_dither(bitdepth, *left++, &left_dither,
play->stats) & mask);
if (right) {
fprintf(outfile, format_str,
audio_linear_dither(bitdepth, *right++, &right_dither,
play->stats) & mask);
}
}
}
break;
}
return 0;
}
static
int stop(struct audio_stop *stop)
{
return 0;
}
static
int finish(struct audio_finish *finish)
{
if (outfile != stdout &&
fclose(outfile) == EOF) {
audio_error = ":fclose";
return -1;
}
return 0;
}
int audio_hex(union audio_control *control)
{
audio_error = 0;
switch (control->command) {
case AUDIO_COMMAND_INIT:
return init(&control->init);
case AUDIO_COMMAND_CONFIG:
return config(&control->config);
case AUDIO_COMMAND_PLAY:
return play(&control->play);
case AUDIO_COMMAND_STOP:
return stop(&control->stop);
case AUDIO_COMMAND_FINISH:
return finish(&control->finish);
}
return 0;
}
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