/*
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/*
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* mad - MPEG audio decoder
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* mad - MPEG audio decoder
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* Copyright (C) 2000-2001 Robert Leslie
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* Copyright (C) 2000-2001 Robert Leslie
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* (at your option) any later version.
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*
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*
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* This program is distributed in the hope that it will be useful,
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* GNU General Public License for more details.
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*
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*
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* You should have received a copy of the GNU General Public License
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*
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* $Id: audio.h,v 1.1.1.1 2001-11-04 19:00:22 lampret Exp $
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* $Id: audio.h,v 1.1.1.1 2001-11-04 19:00:22 lampret Exp $
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*/
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*/
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# ifndef AUDIO_H
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# ifndef AUDIO_H
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# define AUDIO_H
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# define AUDIO_H
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# include "mad.h"
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# include "mad.h"
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# define MAX_NSAMPLES (1152 * 3) /* allow for resampled frame */
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# define MAX_NSAMPLES (1152 * 3) /* allow for resampled frame */
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enum audio_command {
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enum audio_command {
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AUDIO_COMMAND_INIT,
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AUDIO_COMMAND_INIT,
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AUDIO_COMMAND_CONFIG,
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AUDIO_COMMAND_CONFIG,
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AUDIO_COMMAND_FINISH
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AUDIO_COMMAND_FINISH
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};
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};
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enum audio_mode {
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enum audio_mode {
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AUDIO_MODE_ROUND = 0x0001,
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AUDIO_MODE_ROUND = 0x0001,
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AUDIO_MODE_DITHER = 0x0002
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AUDIO_MODE_DITHER = 0x0002
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};
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};
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struct audio_stats {
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struct audio_stats {
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unsigned long clipped_samples;
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unsigned long clipped_samples;
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mad_fixed_t peak_clipping;
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mad_fixed_t peak_clipping;
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mad_fixed_t peak_sample;
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mad_fixed_t peak_sample;
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};
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};
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union audio_control {
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union audio_control {
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enum audio_command command;
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enum audio_command command;
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struct audio_init {
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struct audio_init {
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enum audio_command command;
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enum audio_command command;
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char const *path;
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char const *path;
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} init;
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} init;
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struct audio_config {
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struct audio_config {
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enum audio_command command;
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enum audio_command command;
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unsigned int channels;
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unsigned int channels;
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unsigned int speed;
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unsigned int speed;
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} config;
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} config;
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struct audio_play {
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struct audio_play {
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enum audio_command command;
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enum audio_command command;
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unsigned int nsamples;
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unsigned int nsamples;
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mad_fixed_t const *samples[2];
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mad_fixed_t const *samples[2];
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enum audio_mode mode;
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enum audio_mode mode;
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struct audio_stats *stats;
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struct audio_stats *stats;
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} play;
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} play;
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struct audio_finish {
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struct audio_finish {
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enum audio_command command;
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enum audio_command command;
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} finish;
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} finish;
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};
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};
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extern char const *audio_error;
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extern char const *audio_error;
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typedef int audio_ctlfunc_t(union audio_control *);
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typedef int audio_ctlfunc_t(union audio_control *);
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audio_ctlfunc_t *audio_output(char const **);
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audio_ctlfunc_t *audio_output(char const **);
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audio_ctlfunc_t audio_oss;
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audio_ctlfunc_t audio_oss;
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audio_ctlfunc_t audio_empeg;
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audio_ctlfunc_t audio_empeg;
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audio_ctlfunc_t audio_sun;
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audio_ctlfunc_t audio_sun;
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audio_ctlfunc_t audio_win32;
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audio_ctlfunc_t audio_win32;
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audio_ctlfunc_t audio_raw;
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audio_ctlfunc_t audio_raw;
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audio_ctlfunc_t audio_wave;
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audio_ctlfunc_t audio_wave;
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audio_ctlfunc_t audio_snd;
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audio_ctlfunc_t audio_snd;
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audio_ctlfunc_t audio_hex;
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audio_ctlfunc_t audio_hex;
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audio_ctlfunc_t audio_null;
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audio_ctlfunc_t audio_null;
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signed long audio_linear_round(unsigned int, mad_fixed_t,
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signed long audio_linear_round(unsigned int, mad_fixed_t,
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struct audio_stats *);
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struct audio_stats *);
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signed long audio_linear_dither(unsigned int, mad_fixed_t, mad_fixed_t *,
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signed long audio_linear_dither(unsigned int, mad_fixed_t, mad_fixed_t *,
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struct audio_stats *);
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struct audio_stats *);
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unsigned int audio_pcm_s16le(unsigned char *, unsigned int,
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unsigned int audio_pcm_s16le(unsigned char *, unsigned int,
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mad_fixed_t const *, mad_fixed_t const *);
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mad_fixed_t const *, mad_fixed_t const *);
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unsigned char audio_mulaw_round(mad_fixed_t);
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unsigned char audio_mulaw_round(mad_fixed_t);
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unsigned char audio_mulaw_dither(mad_fixed_t, mad_fixed_t *);
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unsigned char audio_mulaw_dither(mad_fixed_t, mad_fixed_t *);
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unsigned int audio_pcm_mulaw(unsigned char *, unsigned int,
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unsigned int audio_pcm_mulaw(unsigned char *, unsigned int,
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mad_fixed_t const *, mad_fixed_t const *,
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mad_fixed_t const *, mad_fixed_t const *,
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enum audio_mode, struct audio_stats *);
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enum audio_mode, struct audio_stats *);
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# endif
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# endif
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