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/*
* madplay - MPEG audio decoder and player
* Copyright (C) 2000-2004 Robert Leslie
* QNX audio output module (C) 2001 Steven Grimm
*
* 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_qnx.c,v 1.9 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 <sys/asoundlib.h>
# include <stdlib.h>
# include <mad.h>
# include "gettext.h"
# include "audio.h"
# if defined(WORDS_BIGENDIAN)
# define audio_pcm_s16 audio_pcm_s16be
# else
# define audio_pcm_s16 audio_pcm_s16le
# endif
static snd_pcm_t *pcm_handle;
static snd_mixer_t *mixer_handle;
static int card = -1, dev = -1, frag_size = 8192, frags_max = 32;
static void fill_int(char *name, int *var)
{
char *tmp = getenv(name);
if (tmp != NULL)
*var = atoi(tmp);
}
static
int init(struct audio_init *init)
{
fill_int("MADPLAY_CARD", &card);
fill_int("MADPLAY_DEV", &dev);
fill_int("MADPLAY_FRAG_SIZE", &frag_size);
fill_int("MADPLAY_FRAGS_MAX", &frags_max);
if (card == -1)
{
if (snd_pcm_open_preferred(&pcm_handle, &card, &dev,
SND_PCM_OPEN_PLAYBACK) < 0)
{
audio_error = _("can't open sound card");
return -1;
}
}
else
{
if (snd_pcm_open(&pcm_handle, card, dev,
SND_PCM_OPEN_PLAYBACK) < 0)
{
audio_error = _("can't open sound card");
return -1;
}
}
if (snd_pcm_plugin_set_disable(pcm_handle, PLUGIN_DISABLE_MMAP) < 0)
{
audio_error = _("can't disable mmap mode");
return -1;
}
return 0;
}
static
int config(struct audio_config *config)
{
snd_pcm_channel_params_t pp;
snd_pcm_channel_setup_t setup;
snd_mixer_group_t group;
memset(&pp, 0, sizeof(pp));
memset(&setup, 0, sizeof(setup));
memset(&group, 0, sizeof(group));
pp.mode = SND_PCM_MODE_BLOCK;
pp.channel = SND_PCM_CHANNEL_PLAYBACK;
pp.start_mode = SND_PCM_START_FULL;
pp.stop_mode = SND_PCM_STOP_STOP;
/*
pp.buf.stream.queue_size = 8192; // No docs on these fields!!!
pp.buf.stream.fill = 6144;
pp.buf.stream.max_fill = 8192;
*/
pp.buf.block.frag_size = frag_size;
pp.buf.block.frags_max = frags_max;
pp.buf.block.frags_min = 1;
pp.format.interleave = 1;
pp.format.rate = config->speed;
pp.format.voices = config->channels;
pp.format.format = SND_PCM_SFMT_S16_LE;
/* RSL: indicate 16-bit output */
config->precision = 16;
if (snd_pcm_plugin_params(pcm_handle, &pp) < 0)
{
audio_error = _("can't configure device");
return -1;
}
if (snd_pcm_plugin_prepare (pcm_handle, SND_PCM_CHANNEL_PLAYBACK) < 0)
{
audio_error = _("can't prepare device");
return -1;
}
setup.channel = SND_PCM_CHANNEL_PLAYBACK;
setup.mixer_gid = &group.gid;
if (snd_pcm_plugin_setup(pcm_handle, &setup) < 0)
{
audio_error = _("can't set up plugin");
return -1;
}
if (snd_mixer_open(&mixer_handle, 0, setup.mixer_device) < 0)
{
audio_error = _("can't open mixer");
return -1;
}
return 0;
}
static
int play(struct audio_play *play)
{
unsigned char data[MAX_NSAMPLES * 2 * 2];
int written = 0;
int total_bytes;
audio_pcm_s16le(data, play->nsamples,
play->samples[0], play->samples[1], play->mode, play->stats);
total_bytes = (play->samples[1] ? 4 : 2) * play->nsamples;
while ((written += snd_pcm_plugin_write(pcm_handle, data + written,
total_bytes - written)) < total_bytes)
{
snd_pcm_channel_status_t status;
memset(&status, 0, sizeof(status));
if (snd_pcm_plugin_status(pcm_handle, &status) < 0)
{
audio_error = _("can't get status to recover playback");
return -1;
}
if (status.status == SND_PCM_STATUS_READY ||
status.status == SND_PCM_STATUS_UNDERRUN)
{
if (snd_pcm_plugin_prepare(pcm_handle, SND_PCM_CHANNEL_PLAYBACK) < 0)
{
audio_error = _("can't prepare device to recover playback");
return -1;
}
}
if (written < 0)
written = 0;
}
return 0;
}
static
int stop(struct audio_stop *stop)
{
snd_pcm_plugin_playback_drain(pcm_handle);
return 0;
}
static
int finish(struct audio_finish *finish)
{
snd_pcm_plugin_flush(pcm_handle, SND_PCM_CHANNEL_PLAYBACK);
snd_pcm_close(pcm_handle);
return 0;
}
int audio_qnx(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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