2009-03-13 18:43:16 +01:00
|
|
|
/*
|
2014-01-13 22:30:36 +01:00
|
|
|
* Copyright (C) 2003-2014 The Music Player Daemon Project
|
2009-03-13 18:43:16 +01:00
|
|
|
* http://www.musicpd.org
|
2005-03-05 06:22:30 +01:00
|
|
|
*
|
|
|
|
* 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.
|
2009-03-13 18:43:16 +01:00
|
|
|
*
|
|
|
|
* 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.,
|
|
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
2005-03-05 06:22:30 +01:00
|
|
|
*/
|
|
|
|
|
2009-11-12 09:12:38 +01:00
|
|
|
#include "config.h"
|
2013-01-29 14:32:32 +01:00
|
|
|
#include "AlsaOutputPlugin.hxx"
|
2013-07-30 08:34:10 +02:00
|
|
|
#include "OutputAPI.hxx"
|
2013-02-22 20:51:23 +01:00
|
|
|
#include "MixerList.hxx"
|
2013-04-09 01:24:32 +02:00
|
|
|
#include "pcm/PcmExport.hxx"
|
|
|
|
#include "util/Manual.hxx"
|
2013-08-10 18:02:44 +02:00
|
|
|
#include "util/Error.hxx"
|
|
|
|
#include "util/Domain.hxx"
|
2013-09-27 22:31:24 +02:00
|
|
|
#include "Log.hxx"
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2008-10-26 21:58:37 +01:00
|
|
|
#include <alsa/asoundlib.h>
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
#include <string>
|
|
|
|
|
2005-03-05 06:22:30 +01:00
|
|
|
#define ALSA_PCM_NEW_HW_PARAMS_API
|
|
|
|
#define ALSA_PCM_NEW_SW_PARAMS_API
|
|
|
|
|
2008-09-08 20:42:39 +02:00
|
|
|
static const char default_device[] = "default";
|
|
|
|
|
2013-08-04 12:25:08 +02:00
|
|
|
static constexpr unsigned MPD_ALSA_BUFFER_TIME_US = 500000;
|
2008-12-01 22:37:05 +01:00
|
|
|
|
2006-07-24 03:38:51 +02:00
|
|
|
#define MPD_ALSA_RETRY_NR 5
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2006-07-20 18:02:40 +02:00
|
|
|
typedef snd_pcm_sframes_t alsa_writei_t(snd_pcm_t * pcm, const void *buffer,
|
|
|
|
snd_pcm_uframes_t size);
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
struct AlsaOutput {
|
2011-09-16 23:31:48 +02:00
|
|
|
struct audio_output base;
|
|
|
|
|
2013-04-09 01:24:32 +02:00
|
|
|
Manual<PcmExport> pcm_export;
|
2012-03-21 19:09:22 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
/**
|
|
|
|
* The configured name of the ALSA device; empty for the
|
|
|
|
* default device
|
|
|
|
*/
|
|
|
|
std::string device;
|
2008-10-14 17:21:49 +02:00
|
|
|
|
2009-01-25 13:13:24 +01:00
|
|
|
/** use memory mapped I/O? */
|
|
|
|
bool use_mmap;
|
|
|
|
|
2012-03-21 10:36:19 +01:00
|
|
|
/**
|
|
|
|
* Enable DSD over USB according to the dCS suggested
|
|
|
|
* standard?
|
|
|
|
*
|
|
|
|
* @see http://www.dcsltd.co.uk/page/assets/DSDoverUSB.pdf
|
|
|
|
*/
|
|
|
|
bool dsd_usb;
|
|
|
|
|
2009-01-25 13:13:24 +01:00
|
|
|
/** libasound's buffer_time setting (in microseconds) */
|
|
|
|
unsigned int buffer_time;
|
|
|
|
|
|
|
|
/** libasound's period_time setting (in microseconds) */
|
|
|
|
unsigned int period_time;
|
|
|
|
|
2008-10-14 17:21:49 +02:00
|
|
|
/** the mode flags passed to snd_pcm_open */
|
|
|
|
int mode;
|
|
|
|
|
2009-01-25 13:13:24 +01:00
|
|
|
/** the libasound PCM device handle */
|
2009-01-25 13:05:16 +01:00
|
|
|
snd_pcm_t *pcm;
|
2009-01-25 13:13:24 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* a pointer to the libasound writei() function, which is
|
|
|
|
* snd_pcm_writei() or snd_pcm_mmap_writei(), depending on the
|
|
|
|
* use_mmap configuration
|
|
|
|
*/
|
2006-07-20 18:02:40 +02:00
|
|
|
alsa_writei_t *writei;
|
2009-01-25 13:13:24 +01:00
|
|
|
|
2012-03-22 01:01:11 +01:00
|
|
|
/**
|
|
|
|
* The size of one audio frame passed to method play().
|
|
|
|
*/
|
|
|
|
size_t in_frame_size;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* The size of one audio frame passed to libasound.
|
|
|
|
*/
|
|
|
|
size_t out_frame_size;
|
2009-11-09 22:22:31 +01:00
|
|
|
|
|
|
|
/**
|
|
|
|
* The size of one period, in number of frames.
|
|
|
|
*/
|
|
|
|
snd_pcm_uframes_t period_frames;
|
|
|
|
|
|
|
|
/**
|
|
|
|
* The number of frames written in the current period.
|
|
|
|
*/
|
|
|
|
snd_pcm_uframes_t period_position;
|
2013-01-29 14:32:32 +01:00
|
|
|
|
2013-11-04 23:26:24 +01:00
|
|
|
/**
|
|
|
|
* Set to non-zero when the Raspberry Pi workaround has been
|
|
|
|
* activated in alsa_recover(); decremented by each write.
|
|
|
|
* This will avoid activating it again, leading to an endless
|
|
|
|
* loop. This problem was observed with a "RME Digi9636/52".
|
|
|
|
*/
|
|
|
|
unsigned pi_workaround;
|
|
|
|
|
2013-02-04 14:35:53 +01:00
|
|
|
/**
|
|
|
|
* This buffer gets allocated after opening the ALSA device.
|
|
|
|
* It contains silence samples, enough to fill one period (see
|
|
|
|
* #period_frames).
|
|
|
|
*/
|
2013-12-14 22:17:19 +01:00
|
|
|
uint8_t *silence;
|
2013-02-04 14:35:53 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput():mode(0), writei(snd_pcm_writei) {
|
|
|
|
}
|
|
|
|
|
2013-08-10 18:02:44 +02:00
|
|
|
bool Init(const config_param ¶m, Error &error) {
|
2013-01-29 14:32:32 +01:00
|
|
|
return ao_base_init(&base, &alsa_output_plugin,
|
2013-08-10 18:02:44 +02:00
|
|
|
param, error);
|
2013-01-29 14:32:32 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
void Deinit() {
|
|
|
|
ao_base_finish(&base);
|
|
|
|
}
|
2009-01-25 13:05:16 +01:00
|
|
|
};
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2013-08-10 18:02:44 +02:00
|
|
|
static constexpr Domain alsa_output_domain("alsa_output");
|
2009-02-26 22:04:59 +01:00
|
|
|
|
2008-11-01 14:04:14 +01:00
|
|
|
static const char *
|
2013-01-29 14:32:32 +01:00
|
|
|
alsa_device(const AlsaOutput *ad)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
return ad->device.empty() ? default_device : ad->device.c_str();
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
2008-10-12 11:47:33 +02:00
|
|
|
static void
|
2013-08-04 12:25:08 +02:00
|
|
|
alsa_configure(AlsaOutput *ad, const config_param ¶m)
|
2008-10-12 11:47:33 +02:00
|
|
|
{
|
2013-08-04 12:25:08 +02:00
|
|
|
ad->device = param.GetBlockValue("device", "");
|
2008-11-01 14:04:14 +01:00
|
|
|
|
2013-08-04 12:25:08 +02:00
|
|
|
ad->use_mmap = param.GetBlockValue("use_mmap", false);
|
2009-01-17 20:23:56 +01:00
|
|
|
|
2013-08-04 12:25:08 +02:00
|
|
|
ad->dsd_usb = param.GetBlockValue("dsd_usb", false);
|
2012-03-21 10:36:19 +01:00
|
|
|
|
2013-08-04 12:25:08 +02:00
|
|
|
ad->buffer_time = param.GetBlockValue("buffer_time",
|
|
|
|
MPD_ALSA_BUFFER_TIME_US);
|
|
|
|
ad->period_time = param.GetBlockValue("period_time", 0u);
|
2008-10-14 17:21:49 +02:00
|
|
|
|
2008-10-14 22:37:27 +02:00
|
|
|
#ifdef SND_PCM_NO_AUTO_RESAMPLE
|
2013-08-04 12:25:08 +02:00
|
|
|
if (!param.GetBlockValue("auto_resample", true))
|
2008-10-14 17:21:49 +02:00
|
|
|
ad->mode |= SND_PCM_NO_AUTO_RESAMPLE;
|
2008-10-14 22:37:27 +02:00
|
|
|
#endif
|
2008-10-14 17:21:49 +02:00
|
|
|
|
2008-10-14 22:37:27 +02:00
|
|
|
#ifdef SND_PCM_NO_AUTO_CHANNELS
|
2013-08-04 12:25:08 +02:00
|
|
|
if (!param.GetBlockValue("auto_channels", true))
|
2008-10-14 17:21:49 +02:00
|
|
|
ad->mode |= SND_PCM_NO_AUTO_CHANNELS;
|
2008-10-14 22:37:27 +02:00
|
|
|
#endif
|
2008-10-14 17:21:49 +02:00
|
|
|
|
2008-10-14 22:37:27 +02:00
|
|
|
#ifdef SND_PCM_NO_AUTO_FORMAT
|
2013-08-04 12:25:08 +02:00
|
|
|
if (!param.GetBlockValue("auto_format", true))
|
2008-10-14 17:21:49 +02:00
|
|
|
ad->mode |= SND_PCM_NO_AUTO_FORMAT;
|
2008-10-14 22:37:27 +02:00
|
|
|
#endif
|
2008-10-12 11:47:33 +02:00
|
|
|
}
|
|
|
|
|
2011-09-16 23:31:48 +02:00
|
|
|
static struct audio_output *
|
2013-08-10 18:02:44 +02:00
|
|
|
alsa_init(const config_param ¶m, Error &error)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = new AlsaOutput();
|
2006-07-16 18:52:19 +02:00
|
|
|
|
2013-08-10 18:02:44 +02:00
|
|
|
if (!ad->Init(param, error)) {
|
2013-01-29 14:32:32 +01:00
|
|
|
delete ad;
|
2013-10-28 23:58:17 +01:00
|
|
|
return nullptr;
|
2011-09-16 23:31:48 +02:00
|
|
|
}
|
|
|
|
|
2009-01-25 16:04:03 +01:00
|
|
|
alsa_configure(ad, param);
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2011-09-16 23:31:48 +02:00
|
|
|
return &ad->base;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static void
|
2011-09-16 23:31:48 +02:00
|
|
|
alsa_finish(struct audio_output *ao)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2012-03-21 18:51:31 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
ad->Deinit();
|
|
|
|
delete ad;
|
2009-04-21 22:47:12 +02:00
|
|
|
|
|
|
|
/* free libasound's config cache */
|
|
|
|
snd_config_update_free_global();
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
2012-03-21 19:09:22 +01:00
|
|
|
static bool
|
2013-08-10 18:02:44 +02:00
|
|
|
alsa_output_enable(struct audio_output *ao, gcc_unused Error &error)
|
2012-03-21 19:09:22 +01:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2012-03-21 19:09:22 +01:00
|
|
|
|
2013-04-09 01:24:32 +02:00
|
|
|
ad->pcm_export.Construct();
|
2012-03-21 19:09:22 +01:00
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
alsa_output_disable(struct audio_output *ao)
|
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2012-03-21 19:09:22 +01:00
|
|
|
|
2013-04-09 01:24:32 +02:00
|
|
|
ad->pcm_export.Destruct();
|
2012-03-21 19:09:22 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static bool
|
|
|
|
alsa_test_default_device(void)
|
2005-03-12 04:10:09 +01:00
|
|
|
{
|
2006-07-20 18:02:40 +02:00
|
|
|
snd_pcm_t *handle;
|
2005-03-12 04:10:09 +01:00
|
|
|
|
2008-09-08 20:42:39 +02:00
|
|
|
int ret = snd_pcm_open(&handle, default_device,
|
|
|
|
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (ret) {
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatError(alsa_output_domain,
|
|
|
|
"Error opening default ALSA device: %s",
|
|
|
|
snd_strerror(-ret));
|
2008-10-29 20:40:27 +01:00
|
|
|
return false;
|
2006-07-20 18:02:40 +02:00
|
|
|
} else
|
|
|
|
snd_pcm_close(handle);
|
2005-03-12 04:10:09 +01:00
|
|
|
|
2008-10-29 20:40:27 +01:00
|
|
|
return true;
|
2005-03-12 04:10:09 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static snd_pcm_format_t
|
2013-08-03 21:00:50 +02:00
|
|
|
get_bitformat(SampleFormat sample_format)
|
2008-09-08 20:42:51 +02:00
|
|
|
{
|
2010-01-16 17:45:56 +01:00
|
|
|
switch (sample_format) {
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::UNDEFINED:
|
|
|
|
case SampleFormat::DSD:
|
2011-10-08 14:37:54 +02:00
|
|
|
return SND_PCM_FORMAT_UNKNOWN;
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::S8:
|
2009-11-10 17:11:34 +01:00
|
|
|
return SND_PCM_FORMAT_S8;
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::S16:
|
2009-11-10 17:11:34 +01:00
|
|
|
return SND_PCM_FORMAT_S16;
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::S24_P32:
|
2009-11-10 17:11:34 +01:00
|
|
|
return SND_PCM_FORMAT_S24;
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::S32:
|
2009-11-10 17:11:34 +01:00
|
|
|
return SND_PCM_FORMAT_S32;
|
2011-10-08 10:25:06 +02:00
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
case SampleFormat::FLOAT:
|
2011-10-08 10:25:06 +02:00
|
|
|
return SND_PCM_FORMAT_FLOAT;
|
2008-09-08 20:42:51 +02:00
|
|
|
}
|
2011-10-08 14:37:54 +02:00
|
|
|
|
|
|
|
assert(false);
|
2013-08-03 21:34:17 +02:00
|
|
|
gcc_unreachable();
|
2008-09-08 20:42:51 +02:00
|
|
|
}
|
|
|
|
|
2009-07-19 17:43:08 +02:00
|
|
|
static snd_pcm_format_t
|
|
|
|
byteswap_bitformat(snd_pcm_format_t fmt)
|
|
|
|
{
|
|
|
|
switch(fmt) {
|
|
|
|
case SND_PCM_FORMAT_S16_LE: return SND_PCM_FORMAT_S16_BE;
|
|
|
|
case SND_PCM_FORMAT_S24_LE: return SND_PCM_FORMAT_S24_BE;
|
|
|
|
case SND_PCM_FORMAT_S32_LE: return SND_PCM_FORMAT_S32_BE;
|
|
|
|
case SND_PCM_FORMAT_S16_BE: return SND_PCM_FORMAT_S16_LE;
|
|
|
|
case SND_PCM_FORMAT_S24_BE: return SND_PCM_FORMAT_S24_LE;
|
2010-01-16 18:35:10 +01:00
|
|
|
|
|
|
|
case SND_PCM_FORMAT_S24_3BE:
|
|
|
|
return SND_PCM_FORMAT_S24_3LE;
|
|
|
|
|
|
|
|
case SND_PCM_FORMAT_S24_3LE:
|
|
|
|
return SND_PCM_FORMAT_S24_3BE;
|
|
|
|
|
2009-07-19 17:43:08 +02:00
|
|
|
case SND_PCM_FORMAT_S32_BE: return SND_PCM_FORMAT_S32_LE;
|
|
|
|
default: return SND_PCM_FORMAT_UNKNOWN;
|
|
|
|
}
|
|
|
|
}
|
2010-01-16 17:14:30 +01:00
|
|
|
|
2012-03-21 23:59:31 +01:00
|
|
|
static snd_pcm_format_t
|
|
|
|
alsa_to_packed_format(snd_pcm_format_t fmt)
|
|
|
|
{
|
|
|
|
switch (fmt) {
|
|
|
|
case SND_PCM_FORMAT_S24_LE:
|
|
|
|
return SND_PCM_FORMAT_S24_3LE;
|
|
|
|
|
|
|
|
case SND_PCM_FORMAT_S24_BE:
|
|
|
|
return SND_PCM_FORMAT_S24_3BE;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return SND_PCM_FORMAT_UNKNOWN;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
alsa_try_format_or_packed(snd_pcm_t *pcm, snd_pcm_hw_params_t *hwparams,
|
|
|
|
snd_pcm_format_t fmt, bool *packed_r)
|
|
|
|
{
|
|
|
|
int err = snd_pcm_hw_params_set_format(pcm, hwparams, fmt);
|
|
|
|
if (err == 0)
|
|
|
|
*packed_r = false;
|
|
|
|
|
|
|
|
if (err != -EINVAL)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
fmt = alsa_to_packed_format(fmt);
|
|
|
|
if (fmt == SND_PCM_FORMAT_UNKNOWN)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
err = snd_pcm_hw_params_set_format(pcm, hwparams, fmt);
|
|
|
|
if (err == 0)
|
|
|
|
*packed_r = true;
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2010-01-16 17:41:28 +01:00
|
|
|
/**
|
2012-03-22 00:23:07 +01:00
|
|
|
* Attempts to configure the specified sample format, and tries the
|
|
|
|
* reversed host byte order if was not supported.
|
2010-01-16 17:41:28 +01:00
|
|
|
*/
|
|
|
|
static int
|
|
|
|
alsa_output_try_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *hwparams,
|
2013-08-03 21:00:50 +02:00
|
|
|
SampleFormat sample_format,
|
2012-03-21 23:59:31 +01:00
|
|
|
bool *packed_r, bool *reverse_endian_r)
|
2010-01-16 17:41:28 +01:00
|
|
|
{
|
|
|
|
snd_pcm_format_t alsa_format = get_bitformat(sample_format);
|
|
|
|
if (alsa_format == SND_PCM_FORMAT_UNKNOWN)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-03-21 23:59:31 +01:00
|
|
|
int err = alsa_try_format_or_packed(pcm, hwparams, alsa_format,
|
|
|
|
packed_r);
|
2012-03-22 00:24:56 +01:00
|
|
|
if (err == 0)
|
2012-03-22 00:23:07 +01:00
|
|
|
*reverse_endian_r = false;
|
2010-01-16 17:41:28 +01:00
|
|
|
|
2012-03-22 00:23:07 +01:00
|
|
|
if (err != -EINVAL)
|
|
|
|
return err;
|
2010-01-16 17:41:28 +01:00
|
|
|
|
2012-03-22 00:23:07 +01:00
|
|
|
alsa_format = byteswap_bitformat(alsa_format);
|
2010-01-16 17:41:28 +01:00
|
|
|
if (alsa_format == SND_PCM_FORMAT_UNKNOWN)
|
|
|
|
return -EINVAL;
|
|
|
|
|
2012-03-21 23:59:31 +01:00
|
|
|
err = alsa_try_format_or_packed(pcm, hwparams, alsa_format, packed_r);
|
2012-03-22 00:24:56 +01:00
|
|
|
if (err == 0)
|
2012-03-21 19:09:22 +01:00
|
|
|
*reverse_endian_r = true;
|
2010-01-16 18:08:13 +01:00
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
2009-02-25 22:01:30 +01:00
|
|
|
/**
|
2010-01-16 17:14:30 +01:00
|
|
|
* Configure a sample format, and probe other formats if that fails.
|
2009-02-25 22:01:30 +01:00
|
|
|
*/
|
2010-01-16 17:14:30 +01:00
|
|
|
static int
|
|
|
|
alsa_output_setup_format(snd_pcm_t *pcm, snd_pcm_hw_params_t *hwparams,
|
2013-08-03 21:00:50 +02:00
|
|
|
AudioFormat &audio_format,
|
2012-03-21 23:59:31 +01:00
|
|
|
bool *packed_r, bool *reverse_endian_r)
|
2005-03-05 06:22:30 +01:00
|
|
|
{
|
2010-01-16 18:08:13 +01:00
|
|
|
/* try the input format first */
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
int err = alsa_output_try_format(pcm, hwparams,
|
2013-08-03 21:00:50 +02:00
|
|
|
audio_format.format,
|
2012-03-21 23:59:31 +01:00
|
|
|
packed_r, reverse_endian_r);
|
2010-01-16 17:14:30 +01:00
|
|
|
|
2010-01-16 18:08:13 +01:00
|
|
|
/* if unsupported by the hardware, try other formats */
|
2010-01-16 17:14:30 +01:00
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
static const SampleFormat probe_formats[] = {
|
|
|
|
SampleFormat::S24_P32,
|
|
|
|
SampleFormat::S32,
|
|
|
|
SampleFormat::S16,
|
|
|
|
SampleFormat::S8,
|
|
|
|
SampleFormat::UNDEFINED,
|
2010-01-16 18:08:13 +01:00
|
|
|
};
|
2009-03-02 16:41:38 +01:00
|
|
|
|
2012-03-22 00:29:56 +01:00
|
|
|
for (unsigned i = 0;
|
2013-08-03 21:00:50 +02:00
|
|
|
err == -EINVAL && probe_formats[i] != SampleFormat::UNDEFINED;
|
2012-03-22 00:29:56 +01:00
|
|
|
++i) {
|
2013-08-03 21:00:50 +02:00
|
|
|
const SampleFormat mpd_format = probe_formats[i];
|
|
|
|
if (mpd_format == audio_format.format)
|
2010-01-16 18:08:13 +01:00
|
|
|
continue;
|
2010-01-16 17:41:28 +01:00
|
|
|
|
2012-03-22 00:24:56 +01:00
|
|
|
err = alsa_output_try_format(pcm, hwparams, mpd_format,
|
2012-03-21 23:59:31 +01:00
|
|
|
packed_r, reverse_endian_r);
|
2012-03-22 00:24:56 +01:00
|
|
|
if (err == 0)
|
2013-08-03 21:00:50 +02:00
|
|
|
audio_format.format = mpd_format;
|
2009-07-19 17:43:08 +02:00
|
|
|
}
|
2008-10-12 12:02:55 +02:00
|
|
|
|
2012-03-22 00:29:56 +01:00
|
|
|
return err;
|
2010-01-16 17:14:30 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* Set up the snd_pcm_t object which was opened by the caller. Set up
|
|
|
|
* the configured settings and the audio format.
|
|
|
|
*/
|
|
|
|
static bool
|
2013-08-03 21:00:50 +02:00
|
|
|
alsa_setup(AlsaOutput *ad, AudioFormat &audio_format,
|
2013-08-10 18:02:44 +02:00
|
|
|
bool *packed_r, bool *reverse_endian_r, Error &error)
|
2010-01-16 17:14:30 +01:00
|
|
|
{
|
2013-08-03 21:00:50 +02:00
|
|
|
unsigned int sample_rate = audio_format.sample_rate;
|
|
|
|
unsigned int channels = audio_format.channels;
|
2010-01-16 17:14:30 +01:00
|
|
|
int err;
|
2013-10-28 23:58:17 +01:00
|
|
|
const char *cmd = nullptr;
|
2010-01-16 17:14:30 +01:00
|
|
|
int retry = MPD_ALSA_RETRY_NR;
|
|
|
|
unsigned int period_time, period_time_ro;
|
|
|
|
unsigned int buffer_time;
|
|
|
|
|
|
|
|
period_time_ro = period_time = ad->period_time;
|
|
|
|
configure_hw:
|
|
|
|
/* configure HW params */
|
2013-01-29 14:32:32 +01:00
|
|
|
snd_pcm_hw_params_t *hwparams;
|
2010-01-16 17:14:30 +01:00
|
|
|
snd_pcm_hw_params_alloca(&hwparams);
|
|
|
|
cmd = "snd_pcm_hw_params_any";
|
|
|
|
err = snd_pcm_hw_params_any(ad->pcm, hwparams);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
|
|
|
if (ad->use_mmap) {
|
|
|
|
err = snd_pcm_hw_params_set_access(ad->pcm, hwparams,
|
|
|
|
SND_PCM_ACCESS_MMAP_INTERLEAVED);
|
|
|
|
if (err < 0) {
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatWarning(alsa_output_domain,
|
|
|
|
"Cannot set mmap'ed mode on ALSA device \"%s\": %s",
|
|
|
|
alsa_device(ad), snd_strerror(-err));
|
|
|
|
LogWarning(alsa_output_domain,
|
|
|
|
"Falling back to direct write mode");
|
2010-01-16 17:14:30 +01:00
|
|
|
ad->use_mmap = false;
|
|
|
|
} else
|
|
|
|
ad->writei = snd_pcm_mmap_writei;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!ad->use_mmap) {
|
|
|
|
cmd = "snd_pcm_hw_params_set_access";
|
|
|
|
err = snd_pcm_hw_params_set_access(ad->pcm, hwparams,
|
|
|
|
SND_PCM_ACCESS_RW_INTERLEAVED);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
ad->writei = snd_pcm_writei;
|
|
|
|
}
|
|
|
|
|
2012-03-21 19:09:22 +01:00
|
|
|
err = alsa_output_setup_format(ad->pcm, hwparams, audio_format,
|
2012-03-27 00:32:10 +02:00
|
|
|
packed_r, reverse_endian_r);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0) {
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain, err,
|
|
|
|
"ALSA device \"%s\" does not support format %s: %s",
|
|
|
|
alsa_device(ad),
|
|
|
|
sample_format_to_string(audio_format.format),
|
|
|
|
snd_strerror(-err));
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
2012-03-26 23:49:16 +02:00
|
|
|
snd_pcm_format_t format;
|
|
|
|
if (snd_pcm_hw_params_get_format(hwparams, &format) == 0)
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain,
|
|
|
|
"format=%s (%s)", snd_pcm_format_name(format),
|
|
|
|
snd_pcm_format_description(format));
|
2012-03-26 23:49:16 +02:00
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_hw_params_set_channels_near(ad->pcm, hwparams,
|
2006-07-20 18:02:40 +02:00
|
|
|
&channels);
|
|
|
|
if (err < 0) {
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain, err,
|
|
|
|
"ALSA device \"%s\" does not support %i channels: %s",
|
|
|
|
alsa_device(ad), (int)audio_format.channels,
|
|
|
|
snd_strerror(-err));
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
2013-08-03 21:00:50 +02:00
|
|
|
audio_format.channels = (int8_t)channels;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_hw_params_set_rate_near(ad->pcm, hwparams,
|
2013-10-28 23:58:17 +01:00
|
|
|
&sample_rate, nullptr);
|
2008-10-10 14:40:54 +02:00
|
|
|
if (err < 0 || sample_rate == 0) {
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain, err,
|
|
|
|
"ALSA device \"%s\" does not support %u Hz audio",
|
|
|
|
alsa_device(ad), audio_format.sample_rate);
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
2013-08-03 21:00:50 +02:00
|
|
|
audio_format.sample_rate = sample_rate;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2010-11-05 08:25:21 +01:00
|
|
|
snd_pcm_uframes_t buffer_size_min, buffer_size_max;
|
|
|
|
snd_pcm_hw_params_get_buffer_size_min(hwparams, &buffer_size_min);
|
|
|
|
snd_pcm_hw_params_get_buffer_size_max(hwparams, &buffer_size_max);
|
|
|
|
unsigned buffer_time_min, buffer_time_max;
|
|
|
|
snd_pcm_hw_params_get_buffer_time_min(hwparams, &buffer_time_min, 0);
|
|
|
|
snd_pcm_hw_params_get_buffer_time_max(hwparams, &buffer_time_max, 0);
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain, "buffer: size=%u..%u time=%u..%u",
|
|
|
|
(unsigned)buffer_size_min, (unsigned)buffer_size_max,
|
|
|
|
buffer_time_min, buffer_time_max);
|
2010-11-05 08:25:21 +01:00
|
|
|
|
|
|
|
snd_pcm_uframes_t period_size_min, period_size_max;
|
|
|
|
snd_pcm_hw_params_get_period_size_min(hwparams, &period_size_min, 0);
|
|
|
|
snd_pcm_hw_params_get_period_size_max(hwparams, &period_size_max, 0);
|
|
|
|
unsigned period_time_min, period_time_max;
|
|
|
|
snd_pcm_hw_params_get_period_time_min(hwparams, &period_time_min, 0);
|
|
|
|
snd_pcm_hw_params_get_period_time_max(hwparams, &period_time_max, 0);
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain, "period: size=%u..%u time=%u..%u",
|
|
|
|
(unsigned)period_size_min, (unsigned)period_size_max,
|
|
|
|
period_time_min, period_time_max);
|
2010-11-05 08:25:21 +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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_hw_params_set_buffer_time_near(ad->pcm, hwparams,
|
2013-10-28 23:58:17 +01:00
|
|
|
&buffer_time, nullptr);
|
2008-10-11 12:52:48 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2009-03-08 04:11:30 +01:00
|
|
|
} else {
|
|
|
|
err = snd_pcm_hw_params_get_buffer_time(hwparams, &buffer_time,
|
2013-10-28 23:58:17 +01:00
|
|
|
nullptr);
|
2009-03-08 04:11:30 +01:00
|
|
|
if (err < 0)
|
|
|
|
buffer_time = 0;
|
2008-10-11 12:52:48 +02:00
|
|
|
}
|
2006-07-16 18:52:06 +02:00
|
|
|
|
2009-03-08 03:55:01 +01:00
|
|
|
if (period_time_ro == 0 && buffer_time >= 10000) {
|
|
|
|
period_time_ro = period_time = buffer_time / 4;
|
|
|
|
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain,
|
|
|
|
"default period_time = buffer_time/4 = %u/4 = %u",
|
|
|
|
buffer_time, period_time);
|
2009-03-08 03:55:01 +01:00
|
|
|
}
|
|
|
|
|
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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_hw_params_set_period_time_near(ad->pcm, hwparams,
|
2013-10-28 23:58:17 +01:00
|
|
|
&period_time, nullptr);
|
2008-10-11 12:52:48 +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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_hw_params(ad->pcm, 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)
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain,
|
|
|
|
"ALSA period_time set to %d", period_time);
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
snd_pcm_uframes_t alsa_buffer_size;
|
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
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
snd_pcm_uframes_t alsa_period_size;
|
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,
|
2013-10-28 23:58:17 +01:00
|
|
|
nullptr);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2005-03-05 06:45:39 +01:00
|
|
|
/* configure SW params */
|
2013-01-29 14:32:32 +01:00
|
|
|
snd_pcm_sw_params_t *swparams;
|
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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_sw_params_current(ad->pcm, 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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_sw_params_set_start_threshold(ad->pcm, 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";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_sw_params_set_avail_min(ad->pcm, swparams,
|
2006-07-20 18:02:40 +02:00
|
|
|
alsa_period_size);
|
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
2005-03-13 17:42:04 +01:00
|
|
|
|
|
|
|
cmd = "snd_pcm_sw_params";
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_sw_params(ad->pcm, swparams);
|
2006-07-20 18:02:40 +02:00
|
|
|
if (err < 0)
|
|
|
|
goto error;
|
|
|
|
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain, "buffer_size=%u period_size=%u",
|
|
|
|
(unsigned)alsa_buffer_size, (unsigned)alsa_period_size);
|
2009-03-03 22:19:37 +01:00
|
|
|
|
2011-07-20 06:54:51 +02:00
|
|
|
if (alsa_period_size == 0)
|
|
|
|
/* this works around a SIGFPE bug that occurred when
|
|
|
|
an ALSA driver indicated period_size==0; this
|
|
|
|
caused a division by zero in alsa_play(). By using
|
|
|
|
the fallback "1", we make sure that this won't
|
|
|
|
happen again. */
|
|
|
|
alsa_period_size = 1;
|
|
|
|
|
2009-11-09 22:22:31 +01:00
|
|
|
ad->period_frames = alsa_period_size;
|
|
|
|
ad->period_position = 0;
|
|
|
|
|
2013-12-14 22:17:19 +01:00
|
|
|
ad->silence = new uint8_t[snd_pcm_frames_to_bytes(ad->pcm,
|
|
|
|
alsa_period_size)];
|
2013-02-04 14:35:53 +01:00
|
|
|
snd_pcm_format_set_silence(format, ad->silence,
|
|
|
|
alsa_period_size * channels);
|
|
|
|
|
2008-10-29 20:40:27 +01:00
|
|
|
return true;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2006-08-20 12:13:54 +02:00
|
|
|
error:
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain, err,
|
|
|
|
"Error opening ALSA device \"%s\" (%s): %s",
|
|
|
|
alsa_device(ad), cmd, snd_strerror(-err));
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2012-03-21 10:36:19 +01:00
|
|
|
static bool
|
2013-08-03 21:00:50 +02:00
|
|
|
alsa_setup_dsd(AlsaOutput *ad, const AudioFormat audio_format,
|
2012-03-27 01:05:33 +02:00
|
|
|
bool *shift8_r, bool *packed_r, bool *reverse_endian_r,
|
2013-08-10 18:02:44 +02:00
|
|
|
Error &error)
|
2012-03-21 10:36:19 +01:00
|
|
|
{
|
|
|
|
assert(ad->dsd_usb);
|
2013-08-03 21:00:50 +02:00
|
|
|
assert(audio_format.format == SampleFormat::DSD);
|
2012-03-21 10:36:19 +01:00
|
|
|
|
|
|
|
/* pass 24 bit to alsa_setup() */
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
AudioFormat usb_format = audio_format;
|
|
|
|
usb_format.format = SampleFormat::S24_P32;
|
2012-03-27 00:22:47 +02:00
|
|
|
usb_format.sample_rate /= 2;
|
2012-03-21 10:36:19 +01:00
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
const AudioFormat check = usb_format;
|
2012-03-21 10:36:19 +01:00
|
|
|
|
2013-08-10 18:02:44 +02:00
|
|
|
if (!alsa_setup(ad, usb_format, packed_r, reverse_endian_r, error))
|
2012-03-21 10:36:19 +01:00
|
|
|
return false;
|
|
|
|
|
2012-03-27 01:05:33 +02:00
|
|
|
/* if the device allows only 32 bit, shift all DSD-over-USB
|
|
|
|
samples left by 8 bit and leave the lower 8 bit cleared;
|
|
|
|
the DSD-over-USB documentation does not specify whether
|
|
|
|
this is legal, but there is anecdotical evidence that this
|
|
|
|
is possible (and the only option for some devices) */
|
2013-08-03 21:00:50 +02:00
|
|
|
*shift8_r = usb_format.format == SampleFormat::S32;
|
|
|
|
if (usb_format.format == SampleFormat::S32)
|
|
|
|
usb_format.format = SampleFormat::S24_P32;
|
2012-03-27 01:05:33 +02:00
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
if (usb_format != check) {
|
2012-03-21 10:36:19 +01:00
|
|
|
/* no bit-perfect playback, which is required
|
|
|
|
for DSD over USB */
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain,
|
|
|
|
"Failed to configure DSD-over-USB on ALSA device \"%s\"",
|
|
|
|
alsa_device(ad));
|
2013-12-14 22:17:19 +01:00
|
|
|
delete[] ad->silence;
|
2012-03-21 10:36:19 +01:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
static bool
|
2013-08-03 21:00:50 +02:00
|
|
|
alsa_setup_or_dsd(AlsaOutput *ad, AudioFormat &audio_format,
|
2013-08-10 18:02:44 +02:00
|
|
|
Error &error)
|
2012-03-21 10:36:19 +01:00
|
|
|
{
|
2012-03-27 01:05:33 +02:00
|
|
|
bool shift8 = false, packed, reverse_endian;
|
2012-03-21 10:36:19 +01:00
|
|
|
|
2012-03-27 00:22:47 +02:00
|
|
|
const bool dsd_usb = ad->dsd_usb &&
|
2013-08-03 21:00:50 +02:00
|
|
|
audio_format.format == SampleFormat::DSD;
|
2012-03-27 00:22:47 +02:00
|
|
|
const bool success = dsd_usb
|
2012-03-27 01:05:33 +02:00
|
|
|
? alsa_setup_dsd(ad, audio_format,
|
|
|
|
&shift8, &packed, &reverse_endian,
|
2013-08-10 18:02:44 +02:00
|
|
|
error)
|
2012-03-27 00:32:10 +02:00
|
|
|
: alsa_setup(ad, audio_format, &packed, &reverse_endian,
|
2013-08-10 18:02:44 +02:00
|
|
|
error);
|
2012-03-27 00:32:10 +02:00
|
|
|
if (!success)
|
|
|
|
return false;
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
ad->pcm_export->Open(audio_format.format,
|
|
|
|
audio_format.channels,
|
2013-04-09 01:24:32 +02:00
|
|
|
dsd_usb, shift8, packed, reverse_endian);
|
2012-03-27 00:32:10 +02:00
|
|
|
return true;
|
2012-03-21 10:36:19 +01:00
|
|
|
}
|
|
|
|
|
2009-02-25 22:01:30 +01:00
|
|
|
static bool
|
2013-08-10 18:02:44 +02:00
|
|
|
alsa_open(struct audio_output *ao, AudioFormat &audio_format, Error &error)
|
2009-02-25 22:01:30 +01:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2009-02-25 22:01:30 +01:00
|
|
|
|
2013-11-04 23:26:24 +01:00
|
|
|
ad->pi_workaround = 0;
|
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
int err = snd_pcm_open(&ad->pcm, alsa_device(ad),
|
|
|
|
SND_PCM_STREAM_PLAYBACK, ad->mode);
|
2009-02-25 22:01:30 +01:00
|
|
|
if (err < 0) {
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Format(alsa_output_domain, err,
|
2009-02-26 22:04:59 +01:00
|
|
|
"Failed to open ALSA device \"%s\": %s",
|
|
|
|
alsa_device(ad), snd_strerror(err));
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
2005-03-13 17:42:04 +01:00
|
|
|
}
|
2009-02-25 22:01:30 +01:00
|
|
|
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain, "opened %s type=%s",
|
|
|
|
snd_pcm_name(ad->pcm),
|
|
|
|
snd_pcm_type_name(snd_pcm_type(ad->pcm)));
|
2012-03-26 23:49:16 +02:00
|
|
|
|
2013-01-29 14:32:32 +01:00
|
|
|
if (!alsa_setup_or_dsd(ad, audio_format, error)) {
|
2009-01-25 13:05:16 +01:00
|
|
|
snd_pcm_close(ad->pcm);
|
2009-02-25 22:01:30 +01:00
|
|
|
return false;
|
|
|
|
}
|
|
|
|
|
2013-08-03 21:00:50 +02:00
|
|
|
ad->in_frame_size = audio_format.GetFrameSize();
|
|
|
|
ad->out_frame_size = ad->pcm_export->GetFrameSize(audio_format);
|
2009-02-25 22:01:30 +01:00
|
|
|
|
|
|
|
return true;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
|
2013-02-04 14:29:15 +01:00
|
|
|
/**
|
|
|
|
* Write silence to the ALSA device.
|
|
|
|
*/
|
|
|
|
static void
|
|
|
|
alsa_write_silence(AlsaOutput *ad, snd_pcm_uframes_t nframes)
|
|
|
|
{
|
2013-02-04 14:35:53 +01:00
|
|
|
ad->writei(ad->pcm, ad->silence, nframes);
|
2013-02-04 14:29:15 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static int
|
2013-01-29 14:32:32 +01:00
|
|
|
alsa_recover(AlsaOutput *ad, int err)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
|
|
|
if (err == -EPIPE) {
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain,
|
|
|
|
"Underrun on ALSA device \"%s\"", alsa_device(ad));
|
2006-07-20 18:02:40 +02:00
|
|
|
} else if (err == -ESTRPIPE) {
|
2013-09-27 22:31:24 +02:00
|
|
|
FormatDebug(alsa_output_domain,
|
|
|
|
"ALSA device \"%s\" was suspended",
|
|
|
|
alsa_device(ad));
|
2005-03-05 15:01:13 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
switch (snd_pcm_state(ad->pcm)) {
|
2005-03-05 21:51:36 +01:00
|
|
|
case SND_PCM_STATE_PAUSED:
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_pause(ad->pcm, /* disable */ 0);
|
2005-03-05 21:51:36 +01:00
|
|
|
break;
|
|
|
|
case SND_PCM_STATE_SUSPENDED:
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_resume(ad->pcm);
|
2008-09-08 09:45:05 +02:00
|
|
|
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:
|
2009-11-09 22:22:31 +01:00
|
|
|
ad->period_position = 0;
|
2009-01-25 13:05:16 +01:00
|
|
|
err = snd_pcm_prepare(ad->pcm);
|
2013-02-04 15:41:33 +01:00
|
|
|
|
2013-11-04 23:26:24 +01:00
|
|
|
if (err == 0 && ad->pi_workaround == 0) {
|
2013-02-04 15:41:33 +01:00
|
|
|
/* this works around a driver bug observed on
|
|
|
|
the Raspberry Pi: after snd_pcm_drop(), the
|
|
|
|
whole ring buffer must be invalidated, but
|
|
|
|
the snd_pcm_prepare() call above makes the
|
|
|
|
driver play random data that just happens
|
|
|
|
to be still in the buffer; by adding and
|
|
|
|
cancelling some silence, this bug does not
|
|
|
|
occur */
|
|
|
|
alsa_write_silence(ad, ad->period_frames);
|
|
|
|
|
|
|
|
/* cancel the silence data right away to avoid
|
|
|
|
increasing latency; even though this
|
|
|
|
function call invalidates the portion of
|
|
|
|
silence, the driver seems to avoid the
|
|
|
|
bug */
|
|
|
|
snd_pcm_reset(ad->pcm);
|
2013-11-04 23:26:24 +01:00
|
|
|
|
|
|
|
/* disable the workaround for some time */
|
|
|
|
ad->pi_workaround = 8;
|
2013-02-04 15:41:33 +01:00
|
|
|
}
|
|
|
|
|
2005-03-05 21:51:36 +01:00
|
|
|
break;
|
2006-07-16 18:52:29 +02:00
|
|
|
case SND_PCM_STATE_DISCONNECTED:
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2009-10-29 15:59:40 +01:00
|
|
|
static void
|
2011-09-16 23:31:48 +02:00
|
|
|
alsa_drain(struct audio_output *ao)
|
2009-10-29 15:59:40 +01:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2009-10-29 15:59:40 +01:00
|
|
|
|
2009-11-09 22:22:31 +01:00
|
|
|
if (snd_pcm_state(ad->pcm) != SND_PCM_STATE_RUNNING)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (ad->period_position > 0) {
|
|
|
|
/* generate some silence to finish the partial
|
|
|
|
period */
|
|
|
|
snd_pcm_uframes_t nframes =
|
|
|
|
ad->period_frames - ad->period_position;
|
2013-02-04 14:29:15 +01:00
|
|
|
alsa_write_silence(ad, nframes);
|
2009-11-09 22:22:31 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
snd_pcm_drain(ad->pcm);
|
|
|
|
|
|
|
|
ad->period_position = 0;
|
2009-10-29 15:59:40 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static void
|
2011-09-16 23:31:48 +02:00
|
|
|
alsa_cancel(struct audio_output *ao)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2005-12-12 04:22:27 +01:00
|
|
|
|
2009-11-09 22:22:31 +01:00
|
|
|
ad->period_position = 0;
|
|
|
|
|
2009-10-29 15:59:35 +01:00
|
|
|
snd_pcm_drop(ad->pcm);
|
2005-12-12 04:22:27 +01:00
|
|
|
}
|
|
|
|
|
2009-01-25 13:05:16 +01:00
|
|
|
static void
|
2011-09-16 23:31:48 +02:00
|
|
|
alsa_close(struct audio_output *ao)
|
2006-07-20 18:02:40 +02:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2005-03-05 15:01:13 +01:00
|
|
|
|
2009-03-10 21:25:45 +01:00
|
|
|
snd_pcm_close(ad->pcm);
|
2013-12-14 22:17:19 +01:00
|
|
|
delete[] ad->silence;
|
2005-03-05 15:01:13 +01:00
|
|
|
}
|
|
|
|
|
2009-02-23 09:29:56 +01:00
|
|
|
static size_t
|
2011-09-16 23:31:48 +02:00
|
|
|
alsa_play(struct audio_output *ao, const void *chunk, size_t size,
|
2013-08-10 18:02:44 +02:00
|
|
|
Error &error)
|
2005-03-05 06:22:30 +01:00
|
|
|
{
|
2013-01-29 14:32:32 +01:00
|
|
|
AlsaOutput *ad = (AlsaOutput *)ao;
|
2005-03-05 06:22:30 +01:00
|
|
|
|
2012-03-22 01:01:11 +01:00
|
|
|
assert(size % ad->in_frame_size == 0);
|
|
|
|
|
2013-04-09 01:24:32 +02:00
|
|
|
chunk = ad->pcm_export->Export(chunk, size, size);
|
2012-03-21 19:09:22 +01:00
|
|
|
|
2012-03-22 01:01:11 +01:00
|
|
|
assert(size % ad->out_frame_size == 0);
|
|
|
|
|
|
|
|
size /= ad->out_frame_size;
|
2005-03-05 06:45:39 +01:00
|
|
|
|
2009-02-23 09:29:56 +01:00
|
|
|
while (true) {
|
2009-03-10 21:31:13 +01:00
|
|
|
snd_pcm_sframes_t ret = ad->writei(ad->pcm, chunk, size);
|
2009-11-09 22:22:31 +01:00
|
|
|
if (ret > 0) {
|
|
|
|
ad->period_position = (ad->period_position + ret)
|
|
|
|
% ad->period_frames;
|
2012-04-23 21:12:27 +02:00
|
|
|
|
2013-11-04 23:26:24 +01:00
|
|
|
if (ad->pi_workaround > 0)
|
|
|
|
--ad->pi_workaround;
|
|
|
|
|
2012-04-23 21:12:27 +02:00
|
|
|
size_t bytes_written = ret * ad->out_frame_size;
|
2013-04-09 01:24:32 +02:00
|
|
|
return ad->pcm_export->CalcSourceSize(bytes_written);
|
2009-11-09 22:22:31 +01:00
|
|
|
}
|
2009-02-23 09:29:56 +01:00
|
|
|
|
|
|
|
if (ret < 0 && ret != -EAGAIN && ret != -EINTR &&
|
|
|
|
alsa_recover(ad, ret) < 0) {
|
2013-08-10 18:02:44 +02:00
|
|
|
error.Set(alsa_output_domain, ret, snd_strerror(-ret));
|
2009-02-23 09:29:56 +01:00
|
|
|
return 0;
|
2005-03-05 06:22:30 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-09-17 20:04:18 +02:00
|
|
|
const struct audio_output_plugin alsa_output_plugin = {
|
2013-01-29 14:32:32 +01:00
|
|
|
"alsa",
|
|
|
|
alsa_test_default_device,
|
|
|
|
alsa_init,
|
|
|
|
alsa_finish,
|
|
|
|
alsa_output_enable,
|
|
|
|
alsa_output_disable,
|
|
|
|
alsa_open,
|
|
|
|
alsa_close,
|
|
|
|
nullptr,
|
|
|
|
nullptr,
|
|
|
|
alsa_play,
|
|
|
|
alsa_drain,
|
|
|
|
alsa_cancel,
|
|
|
|
nullptr,
|
|
|
|
|
|
|
|
&alsa_mixer_plugin,
|
2005-03-05 06:22:30 +01:00
|
|
|
};
|