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pulseaudio/src/modules/alsa/alsa-util.c
Lennart Poettering 8fe50b0d7c alsa,core: include mapping name in description strings
2009-06-18 04:38:59 +02:00

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/***
This file is part of PulseAudio.
Copyright 2004-2009 Lennart Poettering
Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <sys/types.h>
#include <limits.h>
#include <asoundlib.h>
#include <pulse/sample.h>
#include <pulse/xmalloc.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/i18n.h>
#include <pulse/utf8.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/core-util.h>
#include <pulsecore/atomic.h>
#include <pulsecore/core-error.h>
#include <pulsecore/once.h>
#include <pulsecore/thread.h>
#include <pulsecore/conf-parser.h>
#include "alsa-util.h"
#include "alsa-mixer.h"
#ifdef HAVE_HAL
#include "hal-util.h"
#endif
#ifdef HAVE_UDEV
#include "udev-util.h"
#endif
static int set_format(snd_pcm_t *pcm_handle, snd_pcm_hw_params_t *hwparams, pa_sample_format_t *f) {
static const snd_pcm_format_t format_trans[] = {
[PA_SAMPLE_U8] = SND_PCM_FORMAT_U8,
[PA_SAMPLE_ALAW] = SND_PCM_FORMAT_A_LAW,
[PA_SAMPLE_ULAW] = SND_PCM_FORMAT_MU_LAW,
[PA_SAMPLE_S16LE] = SND_PCM_FORMAT_S16_LE,
[PA_SAMPLE_S16BE] = SND_PCM_FORMAT_S16_BE,
[PA_SAMPLE_FLOAT32LE] = SND_PCM_FORMAT_FLOAT_LE,
[PA_SAMPLE_FLOAT32BE] = SND_PCM_FORMAT_FLOAT_BE,
[PA_SAMPLE_S32LE] = SND_PCM_FORMAT_S32_LE,
[PA_SAMPLE_S32BE] = SND_PCM_FORMAT_S32_BE,
[PA_SAMPLE_S24LE] = SND_PCM_FORMAT_S24_3LE,
[PA_SAMPLE_S24BE] = SND_PCM_FORMAT_S24_3BE,
[PA_SAMPLE_S24_32LE] = SND_PCM_FORMAT_S24_LE,
[PA_SAMPLE_S24_32BE] = SND_PCM_FORMAT_S24_BE,
};
static const pa_sample_format_t try_order[] = {
PA_SAMPLE_FLOAT32NE,
PA_SAMPLE_FLOAT32RE,
PA_SAMPLE_S32NE,
PA_SAMPLE_S32RE,
PA_SAMPLE_S24_32NE,
PA_SAMPLE_S24_32RE,
PA_SAMPLE_S24NE,
PA_SAMPLE_S24RE,
PA_SAMPLE_S16NE,
PA_SAMPLE_S16RE,
PA_SAMPLE_ALAW,
PA_SAMPLE_ULAW,
PA_SAMPLE_U8
};
unsigned i;
int ret;
pa_assert(pcm_handle);
pa_assert(f);
if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
return ret;
pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
snd_pcm_format_description(format_trans[*f]),
pa_alsa_strerror(ret));
if (*f == PA_SAMPLE_FLOAT32BE)
*f = PA_SAMPLE_FLOAT32LE;
else if (*f == PA_SAMPLE_FLOAT32LE)
*f = PA_SAMPLE_FLOAT32BE;
else if (*f == PA_SAMPLE_S24BE)
*f = PA_SAMPLE_S24LE;
else if (*f == PA_SAMPLE_S24LE)
*f = PA_SAMPLE_S24BE;
else if (*f == PA_SAMPLE_S24_32BE)
*f = PA_SAMPLE_S24_32LE;
else if (*f == PA_SAMPLE_S24_32LE)
*f = PA_SAMPLE_S24_32BE;
else if (*f == PA_SAMPLE_S16BE)
*f = PA_SAMPLE_S16LE;
else if (*f == PA_SAMPLE_S16LE)
*f = PA_SAMPLE_S16BE;
else if (*f == PA_SAMPLE_S32BE)
*f = PA_SAMPLE_S32LE;
else if (*f == PA_SAMPLE_S32LE)
*f = PA_SAMPLE_S32BE;
else
goto try_auto;
if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
return ret;
pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
snd_pcm_format_description(format_trans[*f]),
pa_alsa_strerror(ret));
try_auto:
for (i = 0; i < PA_ELEMENTSOF(try_order); i++) {
*f = try_order[i];
if ((ret = snd_pcm_hw_params_set_format(pcm_handle, hwparams, format_trans[*f])) >= 0)
return ret;
pa_log_debug("snd_pcm_hw_params_set_format(%s) failed: %s",
snd_pcm_format_description(format_trans[*f]),
pa_alsa_strerror(ret));
}
return -1;
}
/* Set the hardware parameters of the given ALSA device. Returns the
* selected fragment settings in *period and *period_size */
int pa_alsa_set_hw_params(
snd_pcm_t *pcm_handle,
pa_sample_spec *ss,
uint32_t *periods,
snd_pcm_uframes_t *period_size,
snd_pcm_uframes_t tsched_size,
pa_bool_t *use_mmap,
pa_bool_t *use_tsched,
pa_bool_t require_exact_channel_number) {
int ret = -1;
snd_pcm_uframes_t _period_size = period_size ? *period_size : 0;
unsigned int _periods = periods ? *periods : 0;
unsigned int r = ss->rate;
unsigned int c = ss->channels;
pa_sample_format_t f = ss->format;
snd_pcm_hw_params_t *hwparams;
pa_bool_t _use_mmap = use_mmap && *use_mmap;
pa_bool_t _use_tsched = use_tsched && *use_tsched;
int dir;
pa_assert(pcm_handle);
pa_assert(ss);
snd_pcm_hw_params_alloca(&hwparams);
if ((ret = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
pa_log_debug("snd_pcm_hw_params_any() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if ((ret = snd_pcm_hw_params_set_rate_resample(pcm_handle, hwparams, 0)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_rate_resample() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if (_use_mmap) {
if (snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_MMAP_INTERLEAVED) < 0) {
/* mmap() didn't work, fall back to interleaved */
if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
_use_mmap = FALSE;
}
} else if ((ret = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_access() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if (!_use_mmap)
_use_tsched = FALSE;
if ((ret = set_format(pcm_handle, hwparams, &f)) < 0)
goto finish;
if ((ret = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &r, NULL)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_rate_near() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if (require_exact_channel_number) {
if ((ret = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, c)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_channels(%u) failed: %s", c, pa_alsa_strerror(ret));
goto finish;
}
} else {
if ((ret = snd_pcm_hw_params_set_channels_near(pcm_handle, hwparams, &c)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_channels_near(%u) failed: %s", c, pa_alsa_strerror(ret));
goto finish;
}
}
if ((ret = snd_pcm_hw_params_set_periods_integer(pcm_handle, hwparams)) < 0) {
pa_log_debug("snd_pcm_hw_params_set_periods_integer() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if (_period_size && tsched_size && _periods) {
/* Adjust the buffer sizes, if we didn't get the rate we were asking for */
_period_size = (snd_pcm_uframes_t) (((uint64_t) _period_size * r) / ss->rate);
tsched_size = (snd_pcm_uframes_t) (((uint64_t) tsched_size * r) / ss->rate);
if (_use_tsched) {
snd_pcm_uframes_t buffer_size = 0;
if ((ret = snd_pcm_hw_params_get_buffer_size_max(hwparams, &buffer_size)) < 0)
pa_log_warn("snd_pcm_hw_params_get_buffer_size_max() failed: %s", pa_alsa_strerror(ret));
else
pa_log_debug("Maximum hw buffer size is %u ms", (unsigned) buffer_size * 1000 / r);
_period_size = tsched_size;
_periods = 1;
}
if (_period_size > 0 && _periods > 0) {
snd_pcm_uframes_t buffer_size;
buffer_size = _periods * _period_size;
if ((ret = snd_pcm_hw_params_set_buffer_size_near(pcm_handle, hwparams, &buffer_size)) < 0)
pa_log_info("snd_pcm_hw_params_set_buffer_size_near() failed: %s", pa_alsa_strerror(ret));
}
if (_periods > 0) {
/* First we pass 0 as direction to get exactly what we
* asked for. That this is necessary is presumably a bug
* in ALSA. All in all this is mostly a hint to ALSA, so
* we don't care if this fails. */
dir = 0;
if (snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir) < 0) {
dir = 1;
if (snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir) < 0) {
dir = -1;
if ((ret = snd_pcm_hw_params_set_periods_near(pcm_handle, hwparams, &_periods, &dir)) < 0)
pa_log_info("snd_pcm_hw_params_set_periods_near() failed: %s", pa_alsa_strerror(ret));
}
}
}
}
if ((ret = snd_pcm_hw_params(pcm_handle, hwparams)) < 0)
goto finish;
if (ss->rate != r)
pa_log_info("Device %s doesn't support %u Hz, changed to %u Hz.", snd_pcm_name(pcm_handle), ss->rate, r);
if (ss->channels != c)
pa_log_info("Device %s doesn't support %u channels, changed to %u.", snd_pcm_name(pcm_handle), ss->channels, c);
if (ss->format != f)
pa_log_info("Device %s doesn't support sample format %s, changed to %s.", snd_pcm_name(pcm_handle), pa_sample_format_to_string(ss->format), pa_sample_format_to_string(f));
if ((ret = snd_pcm_prepare(pcm_handle)) < 0) {
pa_log_info("snd_pcm_prepare() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
if ((ret = snd_pcm_hw_params_get_period_size(hwparams, &_period_size, &dir)) < 0 ||
(ret = snd_pcm_hw_params_get_periods(hwparams, &_periods, &dir)) < 0) {
pa_log_info("snd_pcm_hw_params_get_period{s|_size}() failed: %s", pa_alsa_strerror(ret));
goto finish;
}
/* If the sample rate deviates too much, we need to resample */
if (r < ss->rate*.95 || r > ss->rate*1.05)
ss->rate = r;
ss->channels = (uint8_t) c;
ss->format = f;
pa_assert(_periods > 0);
pa_assert(_period_size > 0);
if (periods)
*periods = _periods;
if (period_size)
*period_size = _period_size;
if (use_mmap)
*use_mmap = _use_mmap;
if (use_tsched)
*use_tsched = _use_tsched;
ret = 0;
snd_pcm_nonblock(pcm_handle, 1);
finish:
return ret;
}
int pa_alsa_set_sw_params(snd_pcm_t *pcm, snd_pcm_uframes_t avail_min) {
snd_pcm_sw_params_t *swparams;
snd_pcm_uframes_t boundary;
int err;
pa_assert(pcm);
snd_pcm_sw_params_alloca(&swparams);
if ((err = snd_pcm_sw_params_current(pcm, swparams) < 0)) {
pa_log_warn("Unable to determine current swparams: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_set_period_event(pcm, swparams, 0)) < 0) {
pa_log_warn("Unable to disable period event: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_set_tstamp_mode(pcm, swparams, SND_PCM_TSTAMP_ENABLE)) < 0) {
pa_log_warn("Unable to enable time stamping: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_get_boundary(swparams, &boundary)) < 0) {
pa_log_warn("Unable to get boundary: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_set_stop_threshold(pcm, swparams, boundary)) < 0) {
pa_log_warn("Unable to set stop threshold: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_set_start_threshold(pcm, swparams, (snd_pcm_uframes_t) -1)) < 0) {
pa_log_warn("Unable to set start threshold: %s\n", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params_set_avail_min(pcm, swparams, avail_min)) < 0) {
pa_log_error("snd_pcm_sw_params_set_avail_min() failed: %s", pa_alsa_strerror(err));
return err;
}
if ((err = snd_pcm_sw_params(pcm, swparams)) < 0) {
pa_log_warn("Unable to set sw params: %s\n", pa_alsa_strerror(err));
return err;
}
return 0;
}
snd_pcm_t *pa_alsa_open_by_device_id_auto(
const char *dev_id,
char **dev,
pa_sample_spec *ss,
pa_channel_map* map,
int mode,
uint32_t *nfrags,
snd_pcm_uframes_t *period_size,
snd_pcm_uframes_t tsched_size,
pa_bool_t *use_mmap,
pa_bool_t *use_tsched,
pa_alsa_profile_set *ps,
pa_alsa_mapping **mapping) {
char *d;
snd_pcm_t *pcm_handle;
void *state;
pa_alsa_mapping *m;
pa_assert(dev_id);
pa_assert(dev);
pa_assert(ss);
pa_assert(map);
pa_assert(nfrags);
pa_assert(period_size);
pa_assert(ps);
/* First we try to find a device string with a superset of the
* requested channel map. We iterate through our device table from
* top to bottom and take the first that matches. If we didn't
* find a working device that way, we iterate backwards, and check
* all devices that do not provide a superset of the requested
* channel map.*/
PA_HASHMAP_FOREACH(m, ps->mappings, state) {
if (!pa_channel_map_superset(&m->channel_map, map))
continue;
pa_log_debug("Checking for superset %s (%s)", m->name, m->device_strings[0]);
pcm_handle = pa_alsa_open_by_device_id_mapping(
dev_id,
dev,
ss,
map,
mode,
nfrags,
period_size,
tsched_size,
use_mmap,
use_tsched,
m);
if (pcm_handle) {
if (mapping)
*mapping = m;
return pcm_handle;
}
}
PA_HASHMAP_FOREACH_BACKWARDS(m, ps->mappings, state) {
if (pa_channel_map_superset(&m->channel_map, map))
continue;
pa_log_debug("Checking for subset %s (%s)", m->name, m->device_strings[0]);
pcm_handle = pa_alsa_open_by_device_id_mapping(
dev_id,
dev,
ss,
map,
mode,
nfrags,
period_size,
tsched_size,
use_mmap,
use_tsched,
m);
if (pcm_handle) {
if (mapping)
*mapping = m;
return pcm_handle;
}
}
/* OK, we didn't find any good device, so let's try the raw hw: stuff */
d = pa_sprintf_malloc("hw:%s", dev_id);
pa_log_debug("Trying %s as last resort...", d);
pcm_handle = pa_alsa_open_by_device_string(d, dev, ss, map, mode, nfrags, period_size, tsched_size, use_mmap, use_tsched, FALSE);
pa_xfree(d);
if (pcm_handle && mapping)
*mapping = NULL;
return pcm_handle;
}
snd_pcm_t *pa_alsa_open_by_device_id_mapping(
const char *dev_id,
char **dev,
pa_sample_spec *ss,
pa_channel_map* map,
int mode,
uint32_t *nfrags,
snd_pcm_uframes_t *period_size,
snd_pcm_uframes_t tsched_size,
pa_bool_t *use_mmap,
pa_bool_t *use_tsched,
pa_alsa_mapping *m) {
snd_pcm_t *pcm_handle;
pa_sample_spec try_ss;
pa_channel_map try_map;
pa_assert(dev_id);
pa_assert(dev);
pa_assert(ss);
pa_assert(map);
pa_assert(nfrags);
pa_assert(period_size);
pa_assert(m);
try_ss.channels = m->channel_map.channels;
try_ss.rate = ss->rate;
try_ss.format = ss->format;
try_map = m->channel_map;
pcm_handle = pa_alsa_open_by_template(
m->device_strings,
dev_id,
dev,
&try_ss,
&try_map,
mode,
nfrags,
period_size,
tsched_size,
use_mmap,
use_tsched,
TRUE);
if (!pcm_handle)
return NULL;
*ss = try_ss;
*map = try_map;
pa_assert(map->channels == ss->channels);
return pcm_handle;
}
snd_pcm_t *pa_alsa_open_by_device_string(
const char *device,
char **dev,
pa_sample_spec *ss,
pa_channel_map* map,
int mode,
uint32_t *nfrags,
snd_pcm_uframes_t *period_size,
snd_pcm_uframes_t tsched_size,
pa_bool_t *use_mmap,
pa_bool_t *use_tsched,
pa_bool_t require_exact_channel_number) {
int err;
char *d;
snd_pcm_t *pcm_handle;
pa_bool_t reformat = FALSE;
pa_assert(device);
pa_assert(ss);
pa_assert(map);
d = pa_xstrdup(device);
for (;;) {
pa_log_debug("Trying %s %s SND_PCM_NO_AUTO_FORMAT ...", d, reformat ? "without" : "with");
if ((err = snd_pcm_open(&pcm_handle, d, mode,
SND_PCM_NONBLOCK|
SND_PCM_NO_AUTO_RESAMPLE|
SND_PCM_NO_AUTO_CHANNELS|
(reformat ? 0 : SND_PCM_NO_AUTO_FORMAT))) < 0) {
pa_log_info("Error opening PCM device %s: %s", d, pa_alsa_strerror(err));
goto fail;
}
pa_log_debug("Managed to open %s", d);
if ((err = pa_alsa_set_hw_params(pcm_handle, ss, nfrags, period_size, tsched_size, use_mmap, use_tsched, require_exact_channel_number)) < 0) {
if (!reformat) {
reformat = TRUE;
snd_pcm_close(pcm_handle);
continue;
}
/* Hmm, some hw is very exotic, so we retry with plug, if without it didn't work */
if (!pa_startswith(d, "plug:") && !pa_startswith(d, "plughw:")) {
char *t;
t = pa_sprintf_malloc("plug:%s", d);
pa_xfree(d);
d = t;
reformat = FALSE;
snd_pcm_close(pcm_handle);
continue;
}
pa_log_info("Failed to set hardware parameters on %s: %s", d, pa_alsa_strerror(err));
snd_pcm_close(pcm_handle);
goto fail;
}
if (dev)
*dev = d;
else
pa_xfree(d);
if (ss->channels != map->channels)
pa_channel_map_init_extend(map, ss->channels, PA_CHANNEL_MAP_ALSA);
return pcm_handle;
}
fail:
pa_xfree(d);
return NULL;
}
snd_pcm_t *pa_alsa_open_by_template(
char **template,
const char *dev_id,
char **dev,
pa_sample_spec *ss,
pa_channel_map* map,
int mode,
uint32_t *nfrags,
snd_pcm_uframes_t *period_size,
snd_pcm_uframes_t tsched_size,
pa_bool_t *use_mmap,
pa_bool_t *use_tsched,
pa_bool_t require_exact_channel_number) {
snd_pcm_t *pcm_handle;
char **i;
for (i = template; *i; i++) {
char *d;
d = pa_replace(*i, "%f", dev_id);
pcm_handle = pa_alsa_open_by_device_string(
d,
dev,
ss,
map,
mode,
nfrags,
period_size,
tsched_size,
use_mmap,
use_tsched,
require_exact_channel_number);
pa_xfree(d);
if (pcm_handle)
return pcm_handle;
}
return NULL;
}
void pa_alsa_dump(pa_log_level_t level, snd_pcm_t *pcm) {
int err;
snd_output_t *out;
pa_assert(pcm);
pa_assert_se(snd_output_buffer_open(&out) == 0);
if ((err = snd_pcm_dump(pcm, out)) < 0)
pa_logl(level, "snd_pcm_dump(): %s", pa_alsa_strerror(err));
else {
char *s = NULL;
snd_output_buffer_string(out, &s);
pa_logl(level, "snd_pcm_dump():\n%s", pa_strnull(s));
}
pa_assert_se(snd_output_close(out) == 0);
}
void pa_alsa_dump_status(snd_pcm_t *pcm) {
int err;
snd_output_t *out;
snd_pcm_status_t *status;
char *s = NULL;
pa_assert(pcm);
snd_pcm_status_alloca(&status);
if ((err = snd_output_buffer_open(&out)) < 0) {
pa_log_debug("snd_output_buffer_open() failed: %s", pa_cstrerror(err));
return;
}
if ((err = snd_pcm_status(pcm, status)) < 0) {
pa_log_debug("snd_pcm_status() failed: %s", pa_cstrerror(err));
goto finish;
}
if ((err = snd_pcm_status_dump(status, out)) < 0) {
pa_log_debug("snd_pcm_dump(): %s", pa_alsa_strerror(err));
goto finish;
}
snd_output_buffer_string(out, &s);
pa_log_debug("snd_pcm_dump():\n%s", pa_strnull(s));
finish:
snd_output_close(out);
}
static void alsa_error_handler(const char *file, int line, const char *function, int err, const char *fmt,...) {
va_list ap;
char *alsa_file;
alsa_file = pa_sprintf_malloc("(alsa-lib)%s", file);
va_start(ap, fmt);
pa_log_levelv_meta(PA_LOG_INFO, alsa_file, line, function, fmt, ap);
va_end(ap);
pa_xfree(alsa_file);
}
static pa_atomic_t n_error_handler_installed = PA_ATOMIC_INIT(0);
void pa_alsa_redirect_errors_inc(void) {
/* This is not really thread safe, but we do our best */
if (pa_atomic_inc(&n_error_handler_installed) == 0)
snd_lib_error_set_handler(alsa_error_handler);
}
void pa_alsa_redirect_errors_dec(void) {
int r;
pa_assert_se((r = pa_atomic_dec(&n_error_handler_installed)) >= 1);
if (r == 1)
snd_lib_error_set_handler(NULL);
}
pa_bool_t pa_alsa_init_description(pa_proplist *p) {
const char *d, *k;
pa_assert(p);
if (pa_device_init_description(p))
return TRUE;
if (!(d = pa_proplist_gets(p, "alsa.card_name")))
d = pa_proplist_gets(p, "alsa.name");
if (!d)
return FALSE;
k = pa_proplist_gets(p, PA_PROP_DEVICE_PROFILE_DESCRIPTION);
if (d && k)
pa_proplist_setf(p, PA_PROP_DEVICE_DESCRIPTION, _("%s %s"), d, k);
else if (d)
pa_proplist_sets(p, PA_PROP_DEVICE_DESCRIPTION, d);
return FALSE;
}
void pa_alsa_init_proplist_card(pa_core *c, pa_proplist *p, int card) {
char *cn, *lcn, *dn;
pa_assert(p);
pa_assert(card >= 0);
pa_proplist_setf(p, "alsa.card", "%i", card);
if (snd_card_get_name(card, &cn) >= 0) {
pa_proplist_sets(p, "alsa.card_name", cn);
free(cn);
}
if (snd_card_get_longname(card, &lcn) >= 0) {
pa_proplist_sets(p, "alsa.long_card_name", lcn);
free(lcn);
}
if ((dn = pa_alsa_get_driver_name(card))) {
pa_proplist_sets(p, "alsa.driver_name", dn);
pa_xfree(dn);
}
#ifdef HAVE_UDEV
pa_udev_get_info(card, p);
#endif
#ifdef HAVE_HAL
pa_hal_get_info(c, p, card);
#endif
}
void pa_alsa_init_proplist_pcm_info(pa_core *c, pa_proplist *p, snd_pcm_info_t *pcm_info) {
static const char * const alsa_class_table[SND_PCM_CLASS_LAST+1] = {
[SND_PCM_CLASS_GENERIC] = "generic",
[SND_PCM_CLASS_MULTI] = "multi",
[SND_PCM_CLASS_MODEM] = "modem",
[SND_PCM_CLASS_DIGITIZER] = "digitizer"
};
static const char * const class_table[SND_PCM_CLASS_LAST+1] = {
[SND_PCM_CLASS_GENERIC] = "sound",
[SND_PCM_CLASS_MULTI] = NULL,
[SND_PCM_CLASS_MODEM] = "modem",
[SND_PCM_CLASS_DIGITIZER] = NULL
};
static const char * const alsa_subclass_table[SND_PCM_SUBCLASS_LAST+1] = {
[SND_PCM_SUBCLASS_GENERIC_MIX] = "generic-mix",
[SND_PCM_SUBCLASS_MULTI_MIX] = "multi-mix"
};
snd_pcm_class_t class;
snd_pcm_subclass_t subclass;
const char *n, *id, *sdn;
int card;
pa_assert(p);
pa_assert(pcm_info);
pa_proplist_sets(p, PA_PROP_DEVICE_API, "alsa");
if ((class = snd_pcm_info_get_class(pcm_info)) <= SND_PCM_CLASS_LAST) {
if (class_table[class])
pa_proplist_sets(p, PA_PROP_DEVICE_CLASS, class_table[class]);
if (alsa_class_table[class])
pa_proplist_sets(p, "alsa.class", alsa_class_table[class]);
}
if ((subclass = snd_pcm_info_get_subclass(pcm_info)) <= SND_PCM_SUBCLASS_LAST)
if (alsa_subclass_table[subclass])
pa_proplist_sets(p, "alsa.subclass", alsa_subclass_table[subclass]);
if ((n = snd_pcm_info_get_name(pcm_info)))
pa_proplist_sets(p, "alsa.name", n);
if ((id = snd_pcm_info_get_id(pcm_info)))
pa_proplist_sets(p, "alsa.id", id);
pa_proplist_setf(p, "alsa.subdevice", "%u", snd_pcm_info_get_subdevice(pcm_info));
if ((sdn = snd_pcm_info_get_subdevice_name(pcm_info)))
pa_proplist_sets(p, "alsa.subdevice_name", sdn);
pa_proplist_setf(p, "alsa.device", "%u", snd_pcm_info_get_device(pcm_info));
if ((card = snd_pcm_info_get_card(pcm_info)) >= 0)
pa_alsa_init_proplist_card(c, p, card);
}
void pa_alsa_init_proplist_pcm(pa_core *c, pa_proplist *p, snd_pcm_t *pcm) {
snd_pcm_hw_params_t *hwparams;
snd_pcm_info_t *info;
int bits, err;
snd_pcm_hw_params_alloca(&hwparams);
snd_pcm_info_alloca(&info);
if ((err = snd_pcm_hw_params_current(pcm, hwparams)) < 0)
pa_log_warn("Error fetching hardware parameter info: %s", pa_alsa_strerror(err));
else {
if ((bits = snd_pcm_hw_params_get_sbits(hwparams)) >= 0)
pa_proplist_setf(p, "alsa.resolution_bits", "%i", bits);
}
if ((err = snd_pcm_info(pcm, info)) < 0)
pa_log_warn("Error fetching PCM info: %s", pa_alsa_strerror(err));
else
pa_alsa_init_proplist_pcm_info(c, p, info);
}
void pa_alsa_init_proplist_ctl(pa_proplist *p, const char *name) {
int err;
snd_ctl_t *ctl;
snd_ctl_card_info_t *info;
const char *t;
pa_assert(p);
snd_ctl_card_info_alloca(&info);
if ((err = snd_ctl_open(&ctl, name, 0)) < 0) {
pa_log_warn("Error opening low-level control device '%s'", name);
return;
}
if ((err = snd_ctl_card_info(ctl, info)) < 0) {
pa_log_warn("Control device %s card info: %s", name, snd_strerror(err));
snd_ctl_close(ctl);
return;
}
if ((t = snd_ctl_card_info_get_mixername(info)) && *t)
pa_proplist_sets(p, "alsa.mixer_name", t);
if ((t = snd_ctl_card_info_get_components(info)) && *t)
pa_proplist_sets(p, "alsa.components", t);
snd_ctl_close(ctl);
}
int pa_alsa_recover_from_poll(snd_pcm_t *pcm, int revents) {
snd_pcm_state_t state;
int err;
pa_assert(pcm);
if (revents & POLLERR)
pa_log_debug("Got POLLERR from ALSA");
if (revents & POLLNVAL)
pa_log_warn("Got POLLNVAL from ALSA");
if (revents & POLLHUP)
pa_log_warn("Got POLLHUP from ALSA");
if (revents & POLLPRI)
pa_log_warn("Got POLLPRI from ALSA");
if (revents & POLLIN)
pa_log_debug("Got POLLIN from ALSA");
if (revents & POLLOUT)
pa_log_debug("Got POLLOUT from ALSA");
state = snd_pcm_state(pcm);
pa_log_debug("PCM state is %s", snd_pcm_state_name(state));
/* Try to recover from this error */
switch (state) {
case SND_PCM_STATE_XRUN:
if ((err = snd_pcm_recover(pcm, -EPIPE, 1)) != 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", pa_alsa_strerror(err));
return -1;
}
break;
case SND_PCM_STATE_SUSPENDED:
if ((err = snd_pcm_recover(pcm, -ESTRPIPE, 1)) != 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED: %s", pa_alsa_strerror(err));
return -1;
}
break;
default:
snd_pcm_drop(pcm);
if ((err = snd_pcm_prepare(pcm)) < 0) {
pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): %s", pa_alsa_strerror(err));
return -1;
}
break;
}
return 0;
}
pa_rtpoll_item* pa_alsa_build_pollfd(snd_pcm_t *pcm, pa_rtpoll *rtpoll) {
int n, err;
struct pollfd *pollfd;
pa_rtpoll_item *item;
pa_assert(pcm);
if ((n = snd_pcm_poll_descriptors_count(pcm)) < 0) {
pa_log("snd_pcm_poll_descriptors_count() failed: %s", pa_alsa_strerror(n));
return NULL;
}
item = pa_rtpoll_item_new(rtpoll, PA_RTPOLL_NEVER, (unsigned) n);
pollfd = pa_rtpoll_item_get_pollfd(item, NULL);
if ((err = snd_pcm_poll_descriptors(pcm, pollfd, (unsigned) n)) < 0) {
pa_log("snd_pcm_poll_descriptors() failed: %s", pa_alsa_strerror(err));
pa_rtpoll_item_free(item);
return NULL;
}
return item;
}
snd_pcm_sframes_t pa_alsa_safe_avail(snd_pcm_t *pcm, size_t hwbuf_size, const pa_sample_spec *ss) {
snd_pcm_sframes_t n;
size_t k;
pa_assert(pcm);
pa_assert(hwbuf_size > 0);
pa_assert(ss);
/* Some ALSA driver expose weird bugs, let's inform the user about
* what is going on */
n = snd_pcm_avail(pcm);
if (n <= 0)
return n;
k = (size_t) n * pa_frame_size(ss);
if (k >= hwbuf_size * 5 ||
k >= pa_bytes_per_second(ss)*10) {
PA_ONCE_BEGIN {
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
pa_log(_("snd_pcm_avail() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."),
(unsigned long) k,
(unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
pa_strnull(dn));
pa_xfree(dn);
pa_alsa_dump(PA_LOG_ERROR, pcm);
} PA_ONCE_END;
/* Mhmm, let's try not to fail completely */
n = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
}
return n;
}
int pa_alsa_safe_delay(snd_pcm_t *pcm, snd_pcm_sframes_t *delay, size_t hwbuf_size, const pa_sample_spec *ss) {
ssize_t k;
size_t abs_k;
int r;
pa_assert(pcm);
pa_assert(delay);
pa_assert(hwbuf_size > 0);
pa_assert(ss);
/* Some ALSA driver expose weird bugs, let's inform the user about
* what is going on */
if ((r = snd_pcm_delay(pcm, delay)) < 0)
return r;
k = (ssize_t) *delay * (ssize_t) pa_frame_size(ss);
abs_k = k >= 0 ? (size_t) k : (size_t) -k;
if (abs_k >= hwbuf_size * 5 ||
abs_k >= pa_bytes_per_second(ss)*10) {
PA_ONCE_BEGIN {
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
pa_log(_("snd_pcm_delay() returned a value that is exceptionally large: %li bytes (%s%lu ms).\n"
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."),
(signed long) k,
k < 0 ? "-" : "",
(unsigned long) (pa_bytes_to_usec(abs_k, ss) / PA_USEC_PER_MSEC),
pa_strnull(dn));
pa_xfree(dn);
pa_alsa_dump(PA_LOG_ERROR, pcm);
} PA_ONCE_END;
/* Mhmm, let's try not to fail completely */
if (k < 0)
*delay = -(snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
else
*delay = (snd_pcm_sframes_t) (hwbuf_size / pa_frame_size(ss));
}
return 0;
}
int pa_alsa_safe_mmap_begin(snd_pcm_t *pcm, const snd_pcm_channel_area_t **areas, snd_pcm_uframes_t *offset, snd_pcm_uframes_t *frames, size_t hwbuf_size, const pa_sample_spec *ss) {
int r;
snd_pcm_uframes_t before;
size_t k;
pa_assert(pcm);
pa_assert(areas);
pa_assert(offset);
pa_assert(frames);
pa_assert(hwbuf_size > 0);
pa_assert(ss);
before = *frames;
r = snd_pcm_mmap_begin(pcm, areas, offset, frames);
if (r < 0)
return r;
k = (size_t) *frames * pa_frame_size(ss);
if (*frames > before ||
k >= hwbuf_size * 3 ||
k >= pa_bytes_per_second(ss)*10)
PA_ONCE_BEGIN {
char *dn = pa_alsa_get_driver_name_by_pcm(pcm);
pa_log(_("snd_pcm_mmap_begin() returned a value that is exceptionally large: %lu bytes (%lu ms).\n"
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers."),
(unsigned long) k,
(unsigned long) (pa_bytes_to_usec(k, ss) / PA_USEC_PER_MSEC),
pa_strnull(dn));
pa_xfree(dn);
pa_alsa_dump(PA_LOG_ERROR, pcm);
} PA_ONCE_END;
return r;
}
char *pa_alsa_get_driver_name(int card) {
char *t, *m, *n;
pa_assert(card >= 0);
t = pa_sprintf_malloc("/sys/class/sound/card%i/device/driver/module", card);
m = pa_readlink(t);
pa_xfree(t);
if (!m)
return NULL;
n = pa_xstrdup(pa_path_get_filename(m));
pa_xfree(m);
return n;
}
char *pa_alsa_get_driver_name_by_pcm(snd_pcm_t *pcm) {
int card;
snd_pcm_info_t* info;
snd_pcm_info_alloca(&info);
pa_assert(pcm);
if (snd_pcm_info(pcm, info) < 0)
return NULL;
if ((card = snd_pcm_info_get_card(info)) < 0)
return NULL;
return pa_alsa_get_driver_name(card);
}
char *pa_alsa_get_reserve_name(const char *device) {
const char *t;
int i;
pa_assert(device);
if ((t = strchr(device, ':')))
device = t+1;
if ((i = snd_card_get_index(device)) < 0) {
int32_t k;
if (pa_atoi(device, &k) < 0)
return NULL;
i = (int) k;
}
return pa_sprintf_malloc("Audio%i", i);
}
pa_bool_t pa_alsa_pcm_is_hw(snd_pcm_t *pcm) {
snd_pcm_info_t* info;
snd_pcm_info_alloca(&info);
pa_assert(pcm);
if (snd_pcm_info(pcm, info) < 0)
return FALSE;
return snd_pcm_info_get_card(info) >= 0;
}
pa_bool_t pa_alsa_pcm_is_modem(snd_pcm_t *pcm) {
snd_pcm_info_t* info;
snd_pcm_info_alloca(&info);
pa_assert(pcm);
if (snd_pcm_info(pcm, info) < 0)
return FALSE;
return snd_pcm_info_get_class(info) == SND_PCM_CLASS_MODEM;
}
PA_STATIC_TLS_DECLARE(cstrerror, pa_xfree);
const char* pa_alsa_strerror(int errnum) {
const char *original = NULL;
char *translated, *t;
char errbuf[128];
if ((t = PA_STATIC_TLS_GET(cstrerror)))
pa_xfree(t);
original = snd_strerror(errnum);
if (!original) {
pa_snprintf(errbuf, sizeof(errbuf), "Unknown error %i", errnum);
original = errbuf;
}
if (!(translated = pa_locale_to_utf8(original))) {
pa_log_warn("Unable to convert error string to locale, filtering.");
translated = pa_utf8_filter(original);
}
PA_STATIC_TLS_SET(cstrerror, translated);
return translated;
}
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