Blame libao/audio_out_solaris.c

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/*
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 * audio_out_solaris.c
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 * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
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 * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
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 *
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 * This file is part of a52dec, a free ATSC A-52 stream decoder.
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 * See http://liba52.sourceforge.net/ for updates.
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 *
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 * a52dec 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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 * 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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 *
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 * a52dec 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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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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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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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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#include "config.h"
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#ifdef LIBAO_SOLARIS
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/audioio.h>
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#include <inttypes.h>
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#include "a52.h"
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#include "audio_out.h"
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#include "audio_out_internal.h"
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typedef struct solaris_instance_s {
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    ao_instance_t ao;
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    int fd;
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    int sample_rate;
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    int set_params;
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    int flags;
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} solaris_instance_t;
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static int solaris_setup (ao_instance_t * _instance, int sample_rate,
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			  int * flags, sample_t * level, sample_t * bias)
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{
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    solaris_instance_t * instance = (solaris_instance_t *) _instance;
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    if ((instance->set_params == 0) && (instance->sample_rate != sample_rate))
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	return 1;
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    instance->sample_rate = sample_rate;
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    *flags = instance->flags;
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    *level = 1;
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    *bias = 384;
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    return 0;
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}
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static int solaris_play (ao_instance_t * _instance, int flags,
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			 sample_t * _samples)
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{
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    solaris_instance_t * instance = (solaris_instance_t *) _instance;
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    int16_t int16_samples[256*2];
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#ifdef LIBA52_DOUBLE
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    float samples[256 * 2];
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    int i;
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    for (i = 0; i < 256 * 2; i++)
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	samples[i] = _samples[i];
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#else
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    float * samples = _samples;
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#endif
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    if (instance->set_params) {
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	audio_info_t info;
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        /* Setup our parameters */
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        AUDIO_INITINFO (&info;;
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	info.play.sample_rate = instance->sample_rate;
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	info.play.precision = 16;
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	info.play.channels = 2;
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	info.play.encoding = AUDIO_ENCODING_LINEAR;
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	/* Write our configuration */
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	/* An implicit GETINFO is also performed. */
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	if (ioctl (instance->fd, AUDIO_SETINFO, &info) < 0) {
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	    perror ("Writing audio config block");
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	    return 1;
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	}
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	if ((info.play.sample_rate != instance->sample_rate) ||
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	    (info.play.precision != 16) || (info.play.channels != 2)) {
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	    fprintf (stderr, "Wanted %dHz %d bits %d channels\n",
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		     instance->sample_rate, 16, 2);
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	    fprintf (stderr, "Got    %dHz %d bits %d channels\n",
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		     info.play.sample_rate, info.play.precision,
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		     info.play.channels);
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	    return 1;
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	}
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	instance->flags = flags;
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	instance->set_params = 0;
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    } else if ((flags == A52_DOLBY) && (instance->flags == A52_STEREO)) {
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	fprintf (stderr, "Switching from stereo to dolby surround\n");
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	instance->flags = A52_DOLBY;
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    } else if ((flags == A52_STEREO) && (instance->flags == A52_DOLBY)) {
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	fprintf (stderr, "Switching from dolby surround to stereo\n");
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	instance->flags = A52_STEREO;
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    } else if (flags != instance->flags)
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	return 1;
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    float2s16_2 (samples, int16_samples);
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    write (instance->fd, int16_samples, 256 * sizeof (int16_t) * 2);
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    return 0;
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}
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static void solaris_close (ao_instance_t * _instance)
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{
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    solaris_instance_t * instance = (solaris_instance_t *) _instance;
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    close (instance->fd);
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}
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static ao_instance_t * solaris_open (int flags)
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{
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    solaris_instance_t * instance;
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    instance = malloc (sizeof (solaris_instance_t));
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    if (instance == NULL)
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	return NULL;
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    instance->ao.setup = solaris_setup;
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    instance->ao.play = solaris_play;
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    instance->ao.close = solaris_close;
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    instance->sample_rate = 0;
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    instance->set_params = 1;
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    instance->flags = flags;
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    instance->fd = open ("/dev/audio", O_WRONLY);
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    if (instance->fd < 0) {
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	fprintf (stderr, "Can not open /dev/audio\n");
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	free (instance);
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	return NULL;
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    }
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    return (ao_instance_t *) instance;
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}
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ao_instance_t * ao_solaris_open (void)
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{
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    return solaris_open (A52_STEREO);
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}
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ao_instance_t * ao_solarisdolby_open (void)
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{
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    return solaris_open (A52_DOLBY);
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}
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#endif