2005-03-05 06:22:30 +01:00
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/* the Music Player Daemon (MPD)
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2007-04-05 05:22:33 +02:00
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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2005-03-05 06:22:30 +01:00
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* This project's homepage is: http://www.musicpd.org
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*
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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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* 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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* 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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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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2008-09-07 22:41:17 +02:00
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#include "../output_api.h"
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2008-10-26 21:58:37 +01:00
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#include "../utils.h"
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#include "../log.h"
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2005-03-05 06:22:30 +01:00
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2008-10-26 21:58:37 +01:00
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#include <alsa/asoundlib.h>
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2005-03-05 06:22:30 +01:00
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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2008-09-08 20:42:39 +02:00
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static const char default_device[] = "default";
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2006-07-24 03:38:51 +02:00
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#define MPD_ALSA_RETRY_NR 5
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2005-03-05 06:22:30 +01:00
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2006-07-20 18:02:40 +02:00
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typedef snd_pcm_sframes_t alsa_writei_t(snd_pcm_t * pcm, const void *buffer,
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snd_pcm_uframes_t size);
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2005-03-05 06:22:30 +01:00
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typedef struct _AlsaData {
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2008-09-08 20:42:39 +02:00
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const char *device;
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2008-10-14 17:21:49 +02:00
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/** the mode flags passed to snd_pcm_open */
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int mode;
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2006-07-20 18:02:40 +02:00
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snd_pcm_t *pcmHandle;
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alsa_writei_t *writei;
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2006-07-16 18:52:19 +02:00
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unsigned int buffer_time;
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unsigned int period_time;
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2005-03-05 06:45:39 +01:00
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int sampleSize;
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2005-03-05 21:51:36 +01:00
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int useMmap;
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2005-03-05 06:22:30 +01:00
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} AlsaData;
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2006-07-20 18:02:40 +02:00
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static AlsaData *newAlsaData(void)
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{
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2006-08-26 08:25:57 +02:00
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AlsaData *ret = xmalloc(sizeof(AlsaData));
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2005-03-05 06:22:30 +01:00
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2008-09-08 20:42:39 +02:00
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ret->device = default_device;
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2008-10-14 17:21:49 +02:00
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ret->mode = 0;
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2005-03-05 21:51:36 +01:00
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ret->pcmHandle = NULL;
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2005-03-05 06:22:30 +01:00
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ret->writei = snd_pcm_writei;
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2005-03-05 21:51:36 +01:00
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ret->useMmap = 0;
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2008-10-11 12:52:48 +02:00
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ret->buffer_time = 0;
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ret->period_time = 0;
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2005-03-05 06:22:30 +01:00
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return ret;
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}
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2006-07-20 18:02:40 +02:00
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static void freeAlsaData(AlsaData * ad)
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{
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2008-09-08 20:42:39 +02:00
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if (ad->device && ad->device != default_device)
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xfree(ad->device);
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2005-03-05 06:22:30 +01:00
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free(ad);
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}
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2008-10-12 11:47:33 +02:00
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static void
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alsa_configure(AlsaData *ad, ConfigParam *param)
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{
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BlockParam *bp;
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if ((bp = getBlockParam(param, "device")))
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ad->device = xstrdup(bp->value);
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ad->useMmap = getBoolBlockParam(param, "use_mmap", 1);
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if (ad->useMmap == CONF_BOOL_UNSET)
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ad->useMmap = 0;
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if ((bp = getBlockParam(param, "buffer_time")))
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ad->buffer_time = atoi(bp->value);
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if ((bp = getBlockParam(param, "period_time")))
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ad->period_time = atoi(bp->value);
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2008-10-14 17:21:49 +02:00
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2008-10-14 22:37:27 +02:00
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#ifdef SND_PCM_NO_AUTO_RESAMPLE
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2008-10-14 17:21:49 +02:00
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if (!getBoolBlockParam(param, "auto_resample", true))
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ad->mode |= SND_PCM_NO_AUTO_RESAMPLE;
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2008-10-14 22:37:27 +02:00
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#endif
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2008-10-14 17:21:49 +02:00
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2008-10-14 22:37:27 +02:00
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#ifdef SND_PCM_NO_AUTO_CHANNELS
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2008-10-14 17:21:49 +02:00
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if (!getBoolBlockParam(param, "auto_channels", true))
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ad->mode |= SND_PCM_NO_AUTO_CHANNELS;
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2008-10-14 22:37:27 +02:00
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#endif
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2008-10-14 17:21:49 +02:00
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2008-10-14 22:37:27 +02:00
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#ifdef SND_PCM_NO_AUTO_FORMAT
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2008-10-14 17:21:49 +02:00
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if (!getBoolBlockParam(param, "auto_format", true))
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ad->mode |= SND_PCM_NO_AUTO_FORMAT;
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2008-10-14 22:37:27 +02:00
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#endif
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2008-10-12 11:47:33 +02:00
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}
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2008-09-24 07:20:55 +02:00
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static void *alsa_initDriver(mpd_unused struct audio_output *ao,
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mpd_unused const struct audio_format *audio_format,
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ConfigParam * param)
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2006-07-20 18:02:40 +02:00
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{
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2008-09-08 20:43:59 +02:00
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/* no need for pthread_once thread-safety when reading config */
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static int free_global_registered;
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2006-07-20 18:02:40 +02:00
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AlsaData *ad = newAlsaData();
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2006-07-16 18:52:19 +02:00
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2008-09-08 20:43:59 +02:00
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if (!free_global_registered) {
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atexit((void(*)(void))snd_config_update_free_global);
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free_global_registered = 1;
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}
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2008-10-12 11:47:33 +02:00
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if (param)
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alsa_configure(ad, param);
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2005-03-05 06:22:30 +01:00
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2008-09-24 07:20:55 +02:00
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return ad;
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2005-03-05 06:22:30 +01:00
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}
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2008-09-24 07:20:55 +02:00
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static void alsa_finishDriver(void *data)
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2006-07-20 18:02:40 +02:00
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{
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2008-09-24 07:20:55 +02:00
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AlsaData *ad = data;
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2005-03-05 06:22:30 +01:00
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freeAlsaData(ad);
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}
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sparse: ANSI-fy function declarations
These are just warnings from sparse, but it makes the output
easier to read. I ran this through a quick perl script, but
of course verified the output by looking at the diff and making
sure the thing still compiles.
here's the quick perl script I wrote to generate this patch:
----------- 8< -----------
use Tie::File;
defined(my $pid = open my $fh, '-|') or die $!;
if (!$pid) {
open STDERR, '>&STDOUT' or die $!;
exec 'sparse', @ARGV or die $!;
}
my $na = 'warning: non-ANSI function declaration of function';
while (<$fh>) {
print STDERR $_;
if (/^(.+?\.[ch]):(\d+):(\d+): $na '(\w+)'/o) {
my ($f, $l, $pos, $func) = ($1, $2, $3, $4);
$l--;
tie my @x, 'Tie::File', $f or die "$!: $f";
print '-', $x[$l], "\n";
$x[$l] =~ s/\b($func\s*)\(\s*\)/$1(void)/;
print '+', $x[$l], "\n";
untie @x;
}
}
git-svn-id: https://svn.musicpd.org/mpd/trunk@4378 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2006-07-17 02:15:34 +02:00
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static int alsa_testDefault(void)
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2005-03-12 04:10:09 +01:00
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{
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2006-07-20 18:02:40 +02:00
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snd_pcm_t *handle;
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2005-03-12 04:10:09 +01:00
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2008-09-08 20:42:39 +02:00
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int ret = snd_pcm_open(&handle, default_device,
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SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
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2006-07-20 18:02:40 +02:00
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if (ret) {
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2008-09-08 20:42:34 +02:00
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WARNING("Error opening default ALSA device: %s\n",
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2006-07-20 18:02:40 +02:00
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snd_strerror(-ret));
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2005-03-12 04:10:09 +01:00
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return -1;
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2006-07-20 18:02:40 +02:00
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} else
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snd_pcm_close(handle);
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2005-03-12 04:10:09 +01:00
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return 0;
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}
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2008-09-08 20:42:51 +02:00
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static snd_pcm_format_t get_bitformat(const struct audio_format *af)
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{
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switch (af->bits) {
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case 8: return SND_PCM_FORMAT_S8;
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case 16: return SND_PCM_FORMAT_S16;
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case 24: return SND_PCM_FORMAT_S24;
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case 32: return SND_PCM_FORMAT_S32;
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}
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return SND_PCM_FORMAT_UNKNOWN;
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}
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2008-09-24 07:20:55 +02:00
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static int alsa_openDevice(void *data, struct audio_format *audioFormat)
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2005-03-05 06:22:30 +01:00
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{
|
2008-09-24 07:20:55 +02:00
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AlsaData *ad = data;
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2005-03-05 06:22:30 +01:00
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snd_pcm_format_t bitformat;
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2006-07-20 18:02:40 +02:00
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snd_pcm_hw_params_t *hwparams;
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snd_pcm_sw_params_t *swparams;
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2008-10-10 14:40:54 +02:00
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unsigned int sample_rate = audioFormat->sample_rate;
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2005-03-08 02:53:13 +01:00
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unsigned int channels = audioFormat->channels;
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2005-03-05 06:22:30 +01:00
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snd_pcm_uframes_t alsa_buffer_size;
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snd_pcm_uframes_t alsa_period_size;
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int err;
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2006-07-24 03:38:51 +02:00
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const char *cmd = NULL;
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int retry = MPD_ALSA_RETRY_NR;
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2006-08-12 20:20:55 +02:00
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unsigned int period_time, period_time_ro;
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unsigned int buffer_time;
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2005-03-05 06:22:30 +01:00
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2008-09-08 20:42:51 +02:00
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if ((bitformat = get_bitformat(audioFormat)) == SND_PCM_FORMAT_UNKNOWN)
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2008-10-10 14:03:33 +02:00
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ERROR("ALSA device \"%s\" doesn't support %u bit audio\n",
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2006-07-20 18:02:40 +02:00
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ad->device, audioFormat->bits);
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2005-03-05 06:22:30 +01:00
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2006-07-20 18:02:40 +02:00
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err = snd_pcm_open(&ad->pcmHandle, ad->device,
|
2008-10-14 17:21:49 +02:00
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SND_PCM_STREAM_PLAYBACK, ad->mode);
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2006-07-20 18:02:40 +02:00
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if (err < 0) {
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2005-03-05 21:51:36 +01:00
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ad->pcmHandle = NULL;
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2005-03-05 06:22:30 +01:00
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goto error;
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}
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2006-08-12 20:20:55 +02:00
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period_time_ro = period_time = ad->period_time;
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2006-07-24 03:38:51 +02:00
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configure_hw:
|
2005-03-05 06:45:39 +01:00
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/* configure HW params */
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2005-03-05 06:22:30 +01:00
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snd_pcm_hw_params_alloca(&hwparams);
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2005-03-13 17:42:04 +01:00
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cmd = "snd_pcm_hw_params_any";
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2005-03-05 21:51:36 +01:00
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err = snd_pcm_hw_params_any(ad->pcmHandle, hwparams);
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2006-07-20 18:02:40 +02:00
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if (err < 0)
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goto error;
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2005-03-05 06:22:30 +01:00
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2006-07-20 18:02:40 +02:00
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if (ad->useMmap) {
|
2005-03-05 21:51:36 +01:00
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err = snd_pcm_hw_params_set_access(ad->pcmHandle, hwparams,
|
2006-07-20 18:02:40 +02:00
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SND_PCM_ACCESS_MMAP_INTERLEAVED);
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if (err < 0) {
|
2008-09-08 20:42:34 +02:00
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ERROR("Cannot set mmap'ed mode on ALSA device \"%s\": "
|
2006-07-20 18:02:40 +02:00
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" %s\n", ad->device, snd_strerror(-err));
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2005-03-05 06:22:30 +01:00
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ERROR("Falling back to direct write mode\n");
|
2005-03-05 21:51:36 +01:00
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ad->useMmap = 0;
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2006-07-20 18:02:40 +02:00
|
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} else
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ad->writei = snd_pcm_mmap_writei;
|
2005-03-05 06:22:30 +01:00
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}
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|
2006-07-20 18:02:40 +02:00
|
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if (!ad->useMmap) {
|
2005-03-13 17:42:04 +01:00
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cmd = "snd_pcm_hw_params_set_access";
|
2005-03-05 21:51:36 +01:00
|
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err = snd_pcm_hw_params_set_access(ad->pcmHandle, hwparams,
|
2006-07-20 18:02:40 +02:00
|
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SND_PCM_ACCESS_RW_INTERLEAVED);
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|
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if (err < 0)
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goto error;
|
2005-03-05 06:45:39 +01:00
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ad->writei = snd_pcm_writei;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
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|
2005-03-05 21:51:36 +01:00
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err = snd_pcm_hw_params_set_format(ad->pcmHandle, hwparams, bitformat);
|
2008-10-12 12:02:55 +02:00
|
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|
if (err == -EINVAL && audioFormat->bits != 16) {
|
|
|
|
/* fall back to 16 bit, let pcm_utils.c do the conversion */
|
|
|
|
err = snd_pcm_hw_params_set_format(ad->pcmHandle, hwparams,
|
|
|
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SND_PCM_FORMAT_S16);
|
|
|
|
if (err == 0) {
|
|
|
|
DEBUG("ALSA device \"%s\": converting %u bit to 16 bit\n",
|
|
|
|
ad->device, audioFormat->bits);
|
|
|
|
audioFormat->bits = 16;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0) {
|
2008-10-10 14:03:33 +02:00
|
|
|
ERROR("ALSA device \"%s\" does not support %u bit audio: "
|
2006-11-07 05:10:02 +01:00
|
|
|
"%s\n", ad->device, audioFormat->bits, snd_strerror(-err));
|
2005-03-05 06:22:30 +01:00
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
err = snd_pcm_hw_params_set_channels_near(ad->pcmHandle, hwparams,
|
|
|
|
&channels);
|
|
|
|
if (err < 0) {
|
2006-07-24 03:38:51 +02:00
|
|
|
ERROR("ALSA device \"%s\" does not support %i channels: "
|
2006-07-20 18:02:40 +02:00
|
|
|
"%s\n", ad->device, (int)audioFormat->channels,
|
|
|
|
snd_strerror(-err));
|
2005-03-05 06:22:30 +01:00
|
|
|
goto fail;
|
|
|
|
}
|
2008-09-29 13:29:33 +02:00
|
|
|
audioFormat->channels = (int8_t)channels;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
err = snd_pcm_hw_params_set_rate_near(ad->pcmHandle, hwparams,
|
2008-10-10 14:40:54 +02:00
|
|
|
&sample_rate, NULL);
|
|
|
|
if (err < 0 || sample_rate == 0) {
|
|
|
|
ERROR("ALSA device \"%s\" does not support %u Hz audio\n",
|
|
|
|
ad->device, audioFormat->sample_rate);
|
2005-03-05 06:22:30 +01:00
|
|
|
goto fail;
|
|
|
|
}
|
2008-10-10 14:40:54 +02:00
|
|
|
audioFormat->sample_rate = sample_rate;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2008-10-11 12:52:48 +02:00
|
|
|
if (ad->buffer_time > 0) {
|
|
|
|
buffer_time = ad->buffer_time;
|
|
|
|
cmd = "snd_pcm_hw_params_set_buffer_time_near";
|
|
|
|
err = snd_pcm_hw_params_set_buffer_time_near(ad->pcmHandle, hwparams,
|
|
|
|
&buffer_time, NULL);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
}
|
2006-07-16 18:52:06 +02:00
|
|
|
|
2008-10-11 12:52:48 +02:00
|
|
|
if (period_time_ro > 0) {
|
|
|
|
period_time = period_time_ro;
|
|
|
|
cmd = "snd_pcm_hw_params_set_period_time_near";
|
|
|
|
err = snd_pcm_hw_params_set_period_time_near(ad->pcmHandle, hwparams,
|
|
|
|
&period_time, NULL);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
}
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-13 17:42:04 +01:00
|
|
|
cmd = "snd_pcm_hw_params";
|
2005-03-05 21:51:36 +01:00
|
|
|
err = snd_pcm_hw_params(ad->pcmHandle, hwparams);
|
2008-10-11 12:52:48 +02:00
|
|
|
if (err == -EPIPE && --retry > 0 && period_time_ro > 0) {
|
2006-08-12 20:20:55 +02:00
|
|
|
period_time_ro = period_time_ro >> 1;
|
2006-07-24 03:38:51 +02:00
|
|
|
goto configure_hw;
|
|
|
|
} else if (err < 0)
|
2006-07-20 18:02:40 +02:00
|
|
|
goto error;
|
2006-07-24 03:38:51 +02:00
|
|
|
if (retry != MPD_ALSA_RETRY_NR)
|
2006-08-12 20:20:55 +02:00
|
|
|
DEBUG("ALSA period_time set to %d\n", period_time);
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-13 17:42:04 +01:00
|
|
|
cmd = "snd_pcm_hw_params_get_buffer_size";
|
2005-03-05 06:22:30 +01:00
|
|
|
err = snd_pcm_hw_params_get_buffer_size(hwparams, &alsa_buffer_size);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-13 17:42:04 +01:00
|
|
|
cmd = "snd_pcm_hw_params_get_period_size";
|
2006-07-17 02:15:52 +02:00
|
|
|
err = snd_pcm_hw_params_get_period_size(hwparams, &alsa_period_size,
|
2006-07-20 18:02:40 +02:00
|
|
|
NULL);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-05 06:45:39 +01:00
|
|
|
/* configure SW params */
|
2005-03-05 06:22:30 +01:00
|
|
|
snd_pcm_sw_params_alloca(&swparams);
|
|
|
|
|
2005-03-13 17:42:04 +01:00
|
|
|
cmd = "snd_pcm_sw_params_current";
|
|
|
|
err = snd_pcm_sw_params_current(ad->pcmHandle, swparams);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-13 17:42:04 +01:00
|
|
|
|
|
|
|
cmd = "snd_pcm_sw_params_set_start_threshold";
|
2006-06-12 01:59:18 +02:00
|
|
|
err = snd_pcm_sw_params_set_start_threshold(ad->pcmHandle, swparams,
|
2006-07-20 18:02:40 +02:00
|
|
|
alsa_buffer_size -
|
|
|
|
alsa_period_size);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-13 17:42:04 +01:00
|
|
|
cmd = "snd_pcm_sw_params_set_avail_min";
|
2006-07-20 18:02:40 +02:00
|
|
|
err = snd_pcm_sw_params_set_avail_min(ad->pcmHandle, swparams,
|
|
|
|
alsa_period_size);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-13 17:42:04 +01:00
|
|
|
|
|
|
|
cmd = "snd_pcm_sw_params";
|
2005-03-05 21:51:36 +01:00
|
|
|
err = snd_pcm_sw_params(ad->pcmHandle, swparams);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
2008-10-10 14:41:37 +02:00
|
|
|
ad->sampleSize = audio_format_frame_size(audioFormat);
|
2005-03-05 06:45:39 +01:00
|
|
|
|
2008-10-10 14:03:33 +02:00
|
|
|
DEBUG("ALSA device \"%s\" will be playing %i bit, %u channel audio at "
|
2008-10-10 14:40:54 +02:00
|
|
|
"%u Hz\n", ad->device, audioFormat->bits,
|
|
|
|
channels, sample_rate);
|
2005-03-08 02:53:13 +01:00
|
|
|
|
2005-03-05 06:22:30 +01:00
|
|
|
return 0;
|
|
|
|
|
2006-08-20 12:13:54 +02:00
|
|
|
error:
|
2006-07-20 18:02:40 +02:00
|
|
|
if (cmd) {
|
2008-09-08 20:42:34 +02:00
|
|
|
ERROR("Error opening ALSA device \"%s\" (%s): %s\n",
|
2006-07-20 18:02:40 +02:00
|
|
|
ad->device, cmd, snd_strerror(-err));
|
|
|
|
} else {
|
2008-09-08 20:42:34 +02:00
|
|
|
ERROR("Error opening ALSA device \"%s\": %s\n", ad->device,
|
2006-07-20 18:02:40 +02:00
|
|
|
snd_strerror(-err));
|
2005-03-13 17:42:04 +01:00
|
|
|
}
|
2006-08-20 12:13:54 +02:00
|
|
|
fail:
|
2006-07-20 18:02:40 +02:00
|
|
|
if (ad->pcmHandle)
|
|
|
|
snd_pcm_close(ad->pcmHandle);
|
2005-03-05 21:51:36 +01:00
|
|
|
ad->pcmHandle = NULL;
|
2005-03-05 06:22:30 +01:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
static int alsa_errorRecovery(AlsaData * ad, int err)
|
|
|
|
{
|
|
|
|
if (err == -EPIPE) {
|
2008-09-08 20:42:34 +02:00
|
|
|
DEBUG("Underrun on ALSA device \"%s\"\n", ad->device);
|
2006-07-20 18:02:40 +02:00
|
|
|
} else if (err == -ESTRPIPE) {
|
2008-09-08 20:42:34 +02:00
|
|
|
DEBUG("ALSA device \"%s\" was suspended\n", ad->device);
|
2005-03-05 15:01:13 +01:00
|
|
|
}
|
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
switch (snd_pcm_state(ad->pcmHandle)) {
|
2005-03-05 21:51:36 +01:00
|
|
|
case SND_PCM_STATE_PAUSED:
|
|
|
|
err = snd_pcm_pause(ad->pcmHandle, /* disable */ 0);
|
|
|
|
break;
|
|
|
|
case SND_PCM_STATE_SUSPENDED:
|
2008-09-08 09:45:05 +02:00
|
|
|
err = snd_pcm_resume(ad->pcmHandle);
|
|
|
|
if (err == -EAGAIN)
|
|
|
|
return 0;
|
|
|
|
/* fall-through to snd_pcm_prepare: */
|
2005-03-05 15:01:13 +01:00
|
|
|
case SND_PCM_STATE_SETUP:
|
|
|
|
case SND_PCM_STATE_XRUN:
|
2005-03-05 21:51:36 +01:00
|
|
|
err = snd_pcm_prepare(ad->pcmHandle);
|
|
|
|
break;
|
2006-07-16 18:52:29 +02:00
|
|
|
case SND_PCM_STATE_DISCONNECTED:
|
|
|
|
/* so alsa_closeDevice won't try to drain: */
|
|
|
|
snd_pcm_close(ad->pcmHandle);
|
|
|
|
ad->pcmHandle = NULL;
|
|
|
|
break;
|
2008-04-12 06:07:44 +02:00
|
|
|
/* this is no error, so just keep running */
|
|
|
|
case SND_PCM_STATE_RUNNING:
|
|
|
|
err = 0;
|
|
|
|
break;
|
2005-03-05 15:01:13 +01:00
|
|
|
default:
|
|
|
|
/* unknown state, do nothing */
|
|
|
|
break;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2008-09-24 07:20:55 +02:00
|
|
|
static void alsa_dropBufferedAudio(void *data)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2008-09-24 07:20:55 +02:00
|
|
|
AlsaData *ad = data;
|
2005-12-12 04:22:27 +01:00
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
alsa_errorRecovery(ad, snd_pcm_drop(ad->pcmHandle));
|
2005-12-12 04:22:27 +01:00
|
|
|
}
|
|
|
|
|
2008-09-24 07:20:55 +02:00
|
|
|
static void alsa_closeDevice(void *data)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2008-09-24 07:20:55 +02:00
|
|
|
AlsaData *ad = data;
|
2005-03-05 15:01:13 +01:00
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
if (ad->pcmHandle) {
|
2008-04-12 06:07:44 +02:00
|
|
|
if (snd_pcm_state(ad->pcmHandle) == SND_PCM_STATE_RUNNING) {
|
|
|
|
snd_pcm_drain(ad->pcmHandle);
|
|
|
|
}
|
2005-03-05 21:51:36 +01:00
|
|
|
snd_pcm_close(ad->pcmHandle);
|
|
|
|
ad->pcmHandle = NULL;
|
2005-03-05 15:01:13 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-09-24 07:20:55 +02:00
|
|
|
static int alsa_playAudio(void *data, const char *playChunk, size_t size)
|
2005-03-05 06:22:30 +01:00
|
|
|
{
|
2008-09-24 07:20:55 +02:00
|
|
|
AlsaData *ad = data;
|
2005-03-05 06:22:30 +01:00
|
|
|
int ret;
|
|
|
|
|
2005-03-05 06:45:39 +01:00
|
|
|
size /= ad->sampleSize;
|
|
|
|
|
2005-03-05 06:22:30 +01:00
|
|
|
while (size > 0) {
|
2005-03-05 21:51:36 +01:00
|
|
|
ret = ad->writei(ad->pcmHandle, playChunk, size);
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2008-10-11 12:47:20 +02:00
|
|
|
if (ret == -EAGAIN || ret == -EINTR)
|
2006-07-20 18:02:40 +02:00
|
|
|
continue;
|
|
|
|
|
|
|
|
if (ret < 0) {
|
|
|
|
if (alsa_errorRecovery(ad, ret) < 0) {
|
2008-09-08 20:42:34 +02:00
|
|
|
ERROR("closing ALSA device \"%s\" due to write "
|
2006-07-20 18:02:40 +02:00
|
|
|
"error: %s\n", ad->device,
|
|
|
|
snd_strerror(-errno));
|
2008-09-24 07:20:55 +02:00
|
|
|
alsa_closeDevice(ad);
|
2005-03-05 21:51:36 +01:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
continue;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
2005-03-05 21:51:36 +01:00
|
|
|
|
2005-03-05 06:45:39 +01:00
|
|
|
playChunk += ret * ad->sampleSize;
|
2005-03-05 06:22:30 +01:00
|
|
|
size -= ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2008-09-08 11:43:38 +02:00
|
|
|
const struct audio_output_plugin alsaPlugin = {
|
2008-09-29 15:55:17 +02:00
|
|
|
.name = "alsa",
|
|
|
|
.test_default_device = alsa_testDefault,
|
|
|
|
.init = alsa_initDriver,
|
|
|
|
.finish = alsa_finishDriver,
|
|
|
|
.open = alsa_openDevice,
|
|
|
|
.play = alsa_playAudio,
|
|
|
|
.cancel = alsa_dropBufferedAudio,
|
|
|
|
.close = alsa_closeDevice,
|
2005-03-05 06:22:30 +01:00
|
|
|
};
|