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pulseaudio/src/modules/alsa/alsa-source.c
Arun Raghavan 0d85b18460 sink, source: Allow reconfigure to change the complete sample spec 
For the passthrough case, we allow the entire sink sample spec to be
changed in reconfigure. This will be needed for high bitrate formats. We
duplicate this for sources to keep things in sync as well.

Relatedly, we also restore the original spec on leaving passthrough
mode. We were getting away with not doing so in the past as, while
incorrect, not restoring the rate was not disastrous. With the ability
to change channel count, not restoring breaks the meaning of profiles
entirely. The saving and restoration logic is restricted to sink/source
reconfiguration code to allow it to be self-contained and easier to
reason about.

All this also applies to the channel map. We don't actually explicitly
reconfigure the channel map at the moment, but since
pa_sink/source_reconfigure() can now change the channel count, it seems
to make sense to include the channel map along with that API change for
future use.
2022-07-22 07:07:58 -04:00

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/***
This file is part of PulseAudio.
Copyright 2004-2008 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, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <alsa/asoundlib.h>
#include <pulse/rtclock.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/volume.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core.h>
#include <pulsecore/i18n.h>
#include <pulsecore/module.h>
#include <pulsecore/memchunk.h>
#include <pulsecore/sink.h>
#include <pulsecore/modargs.h>
#include <pulsecore/core-rtclock.h>
#include <pulsecore/core-util.h>
#include <pulsecore/sample-util.h>
#include <pulsecore/log.h>
#include <pulsecore/macro.h>
#include <pulsecore/thread.h>
#include <pulsecore/thread-mq.h>
#include <pulsecore/rtpoll.h>
#ifdef USE_SMOOTHER_2
#include <pulsecore/time-smoother_2.h>
#else
#include <pulsecore/time-smoother.h>
#endif
#include <modules/reserve-wrap.h>
#include "alsa-util.h"
#include "alsa-source.h"
/* #define DEBUG_TIMING */
#define DEFAULT_DEVICE "default"
#define DEFAULT_TSCHED_BUFFER_USEC (2*PA_USEC_PER_SEC) /* 2s */
#define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC) /* 20ms */
#define TSCHED_WATERMARK_INC_STEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms */
#define TSCHED_WATERMARK_DEC_STEP_USEC (5*PA_USEC_PER_MSEC) /* 5ms */
#define TSCHED_WATERMARK_VERIFY_AFTER_USEC (20*PA_USEC_PER_SEC) /* 20s */
#define TSCHED_WATERMARK_INC_THRESHOLD_USEC (0*PA_USEC_PER_MSEC) /* 0ms */
#define TSCHED_WATERMARK_DEC_THRESHOLD_USEC (100*PA_USEC_PER_MSEC) /* 100ms */
#define TSCHED_WATERMARK_STEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms */
#define TSCHED_MIN_SLEEP_USEC (10*PA_USEC_PER_MSEC) /* 10ms */
#define TSCHED_MIN_WAKEUP_USEC (4*PA_USEC_PER_MSEC) /* 4ms */
#ifdef USE_SMOOTHER_2
#define SMOOTHER_WINDOW_USEC (15*PA_USEC_PER_SEC) /* 15s */
#else
#define SMOOTHER_WINDOW_USEC (10*PA_USEC_PER_SEC) /* 10s */
#define SMOOTHER_ADJUST_USEC (1*PA_USEC_PER_SEC) /* 1s */
#define SMOOTHER_MIN_INTERVAL (2*PA_USEC_PER_MSEC) /* 2ms */
#define SMOOTHER_MAX_INTERVAL (200*PA_USEC_PER_MSEC) /* 200ms */
#endif
#define VOLUME_ACCURACY (PA_VOLUME_NORM/100)
struct userdata {
pa_core *core;
pa_module *module;
pa_source *source;
pa_thread *thread;
pa_thread_mq thread_mq;
pa_rtpoll *rtpoll;
snd_pcm_t *pcm_handle;
char *paths_dir;
pa_alsa_fdlist *mixer_fdl;
pa_alsa_mixer_pdata *mixer_pd;
pa_hashmap *mixers;
snd_mixer_t *mixer_handle;
pa_alsa_path_set *mixer_path_set;
pa_alsa_path *mixer_path;
pa_cvolume hardware_volume;
pa_sample_spec verified_sample_spec;
pa_sample_format_t *supported_formats;
unsigned int *supported_rates;
struct {
size_t fragment_size;
size_t nfrags;
size_t tsched_size;
size_t tsched_watermark;
} initial_info;
size_t
frame_size,
fragment_size,
hwbuf_size,
tsched_size,
tsched_watermark,
tsched_watermark_ref,
hwbuf_unused,
min_sleep,
min_wakeup,
watermark_inc_step,
watermark_dec_step,
watermark_inc_threshold,
watermark_dec_threshold;
snd_pcm_uframes_t frames_per_block;
pa_usec_t watermark_dec_not_before;
pa_usec_t min_latency_ref;
pa_usec_t tsched_watermark_usec;
char *device_name; /* name of the PCM device */
char *control_device; /* name of the control device */
bool use_mmap:1, use_tsched:1, deferred_volume:1, fixed_latency_range:1;
bool first;
pa_rtpoll_item *alsa_rtpoll_item;
#ifdef USE_SMOOTHER_2
pa_smoother_2 *smoother;
#else
pa_smoother *smoother;
#endif
uint64_t read_count;
#ifndef USE_SMOOTHER_2
pa_usec_t smoother_interval;
pa_usec_t last_smoother_update;
#endif
pa_reserve_wrapper *reserve;
pa_hook_slot *reserve_slot;
pa_reserve_monitor_wrapper *monitor;
pa_hook_slot *monitor_slot;
/* ucm context */
pa_alsa_ucm_mapping_context *ucm_context;
};
enum {
SOURCE_MESSAGE_SYNC_MIXER = PA_SOURCE_MESSAGE_MAX
};
static void userdata_free(struct userdata *u);
static int unsuspend(struct userdata *u, bool recovering);
static pa_hook_result_t reserve_cb(pa_reserve_wrapper *r, void *forced, struct userdata *u) {
pa_assert(r);
pa_assert(u);
pa_log_debug("Suspending source %s, because another application requested us to release the device.", u->source->name);
if (pa_source_suspend(u->source, true, PA_SUSPEND_APPLICATION) < 0)
return PA_HOOK_CANCEL;
return PA_HOOK_OK;
}
static void reserve_done(struct userdata *u) {
pa_assert(u);
if (u->reserve_slot) {
pa_hook_slot_free(u->reserve_slot);
u->reserve_slot = NULL;
}
if (u->reserve) {
pa_reserve_wrapper_unref(u->reserve);
u->reserve = NULL;
}
}
static void reserve_update(struct userdata *u) {
const char *description;
pa_assert(u);
if (!u->source || !u->reserve)
return;
if ((description = pa_proplist_gets(u->source->proplist, PA_PROP_DEVICE_DESCRIPTION)))
pa_reserve_wrapper_set_application_device_name(u->reserve, description);
}
static int reserve_init(struct userdata *u, const char *dname) {
char *rname;
pa_assert(u);
pa_assert(dname);
if (u->reserve)
return 0;
if (pa_in_system_mode())
return 0;
if (!(rname = pa_alsa_get_reserve_name(dname)))
return 0;
/* We are resuming, try to lock the device */
u->reserve = pa_reserve_wrapper_get(u->core, rname);
pa_xfree(rname);
if (!(u->reserve))
return -1;
reserve_update(u);
pa_assert(!u->reserve_slot);
u->reserve_slot = pa_hook_connect(pa_reserve_wrapper_hook(u->reserve), PA_HOOK_NORMAL, (pa_hook_cb_t) reserve_cb, u);
return 0;
}
static pa_hook_result_t monitor_cb(pa_reserve_monitor_wrapper *w, void* busy, struct userdata *u) {
pa_assert(w);
pa_assert(u);
if (PA_PTR_TO_UINT(busy) && !u->reserve) {
pa_log_debug("Suspending source %s, because another application is blocking the access to the device.", u->source->name);
pa_source_suspend(u->source, true, PA_SUSPEND_APPLICATION);
} else {
pa_log_debug("Resuming source %s, because other applications aren't blocking access to the device any more.", u->source->name);
pa_source_suspend(u->source, false, PA_SUSPEND_APPLICATION);
}
return PA_HOOK_OK;
}
static void monitor_done(struct userdata *u) {
pa_assert(u);
if (u->monitor_slot) {
pa_hook_slot_free(u->monitor_slot);
u->monitor_slot = NULL;
}
if (u->monitor) {
pa_reserve_monitor_wrapper_unref(u->monitor);
u->monitor = NULL;
}
}
static int reserve_monitor_init(struct userdata *u, const char *dname) {
char *rname;
pa_assert(u);
pa_assert(dname);
if (pa_in_system_mode())
return 0;
if (!(rname = pa_alsa_get_reserve_name(dname)))
return 0;
/* We are resuming, try to lock the device */
u->monitor = pa_reserve_monitor_wrapper_get(u->core, rname);
pa_xfree(rname);
if (!(u->monitor))
return -1;
pa_assert(!u->monitor_slot);
u->monitor_slot = pa_hook_connect(pa_reserve_monitor_wrapper_hook(u->monitor), PA_HOOK_NORMAL, (pa_hook_cb_t) monitor_cb, u);
return 0;
}
static void fix_min_sleep_wakeup(struct userdata *u) {
size_t max_use, max_use_2;
pa_assert(u);
pa_assert(u->use_tsched);
max_use = u->hwbuf_size - u->hwbuf_unused;
max_use_2 = pa_frame_align(max_use/2, &u->source->sample_spec);
u->min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->source->sample_spec);
u->min_sleep = PA_CLAMP(u->min_sleep, u->frame_size, max_use_2);
u->min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->source->sample_spec);
u->min_wakeup = PA_CLAMP(u->min_wakeup, u->frame_size, max_use_2);
}
static void fix_tsched_watermark(struct userdata *u) {
size_t max_use;
pa_assert(u);
pa_assert(u->use_tsched);
max_use = u->hwbuf_size - u->hwbuf_unused;
if (u->tsched_watermark > max_use - u->min_sleep)
u->tsched_watermark = max_use - u->min_sleep;
if (u->tsched_watermark < u->min_wakeup)
u->tsched_watermark = u->min_wakeup;
u->tsched_watermark_usec = pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec);
}
static void increase_watermark(struct userdata *u) {
size_t old_watermark;
pa_usec_t old_min_latency, new_min_latency;
pa_assert(u);
pa_assert(u->use_tsched);
/* First, just try to increase the watermark */
old_watermark = u->tsched_watermark;
u->tsched_watermark = PA_MIN(u->tsched_watermark * 2, u->tsched_watermark + u->watermark_inc_step);
fix_tsched_watermark(u);
if (old_watermark != u->tsched_watermark) {
pa_log_info("Increasing wakeup watermark to %0.2f ms",
(double) u->tsched_watermark_usec / PA_USEC_PER_MSEC);
return;
}
/* Hmm, we cannot increase the watermark any further, hence let's
raise the latency unless doing so was disabled in
configuration */
if (u->fixed_latency_range)
return;
old_min_latency = u->source->thread_info.min_latency;
new_min_latency = PA_MIN(old_min_latency * 2, old_min_latency + TSCHED_WATERMARK_INC_STEP_USEC);
new_min_latency = PA_MIN(new_min_latency, u->source->thread_info.max_latency);
if (old_min_latency != new_min_latency) {
pa_log_info("Increasing minimal latency to %0.2f ms",
(double) new_min_latency / PA_USEC_PER_MSEC);
pa_source_set_latency_range_within_thread(u->source, new_min_latency, u->source->thread_info.max_latency);
}
/* When we reach this we're officially fucked! */
}
static void decrease_watermark(struct userdata *u) {
size_t old_watermark;
pa_usec_t now;
pa_assert(u);
pa_assert(u->use_tsched);
now = pa_rtclock_now();
if (u->watermark_dec_not_before <= 0)
goto restart;
if (u->watermark_dec_not_before > now)
return;
old_watermark = u->tsched_watermark;
if (u->tsched_watermark < u->watermark_dec_step)
u->tsched_watermark = u->tsched_watermark / 2;
else
u->tsched_watermark = PA_MAX(u->tsched_watermark / 2, u->tsched_watermark - u->watermark_dec_step);
fix_tsched_watermark(u);
if (old_watermark != u->tsched_watermark)
pa_log_info("Decreasing wakeup watermark to %0.2f ms",
(double) u->tsched_watermark_usec / PA_USEC_PER_MSEC);
/* We don't change the latency range*/
restart:
u->watermark_dec_not_before = now + TSCHED_WATERMARK_VERIFY_AFTER_USEC;
}
/* Called from IO Context on unsuspend or from main thread when creating source */
static void reset_watermark(struct userdata *u, size_t tsched_watermark, pa_sample_spec *ss,
bool in_thread) {
u->tsched_watermark = pa_convert_size(tsched_watermark, ss, &u->source->sample_spec);
u->watermark_inc_step = pa_usec_to_bytes(TSCHED_WATERMARK_INC_STEP_USEC, &u->source->sample_spec);
u->watermark_dec_step = pa_usec_to_bytes(TSCHED_WATERMARK_DEC_STEP_USEC, &u->source->sample_spec);
u->watermark_inc_threshold = pa_usec_to_bytes_round_up(TSCHED_WATERMARK_INC_THRESHOLD_USEC, &u->source->sample_spec);
u->watermark_dec_threshold = pa_usec_to_bytes_round_up(TSCHED_WATERMARK_DEC_THRESHOLD_USEC, &u->source->sample_spec);
fix_min_sleep_wakeup(u);
fix_tsched_watermark(u);
if (in_thread)
pa_source_set_latency_range_within_thread(u->source,
u->min_latency_ref,
pa_bytes_to_usec(u->hwbuf_size, ss));
else {
pa_source_set_latency_range(u->source,
0,
pa_bytes_to_usec(u->hwbuf_size, ss));
/* work-around assert in pa_source_set_latency_within_thead,
keep track of min_latency and reuse it when
this routine is called from IO context */
u->min_latency_ref = u->source->thread_info.min_latency;
}
pa_log_info("Time scheduling watermark is %0.2fms",
(double) u->tsched_watermark_usec / PA_USEC_PER_MSEC);
}
static void hw_sleep_time(struct userdata *u, pa_usec_t *sleep_usec, pa_usec_t*process_usec) {
pa_usec_t wm, usec;
pa_assert(sleep_usec);
pa_assert(process_usec);
pa_assert(u);
pa_assert(u->use_tsched);
usec = pa_source_get_requested_latency_within_thread(u->source);
if (usec == (pa_usec_t) -1)
usec = pa_bytes_to_usec(u->hwbuf_size, &u->source->sample_spec);
wm = u->tsched_watermark_usec;
if (wm > usec)
wm = usec/2;
*sleep_usec = usec - wm;
*process_usec = wm;
#ifdef DEBUG_TIMING
pa_log_debug("Buffer time: %lu ms; Sleep time: %lu ms; Process time: %lu ms",
(unsigned long) (usec / PA_USEC_PER_MSEC),
(unsigned long) (*sleep_usec / PA_USEC_PER_MSEC),
(unsigned long) (*process_usec / PA_USEC_PER_MSEC));
#endif
}
/* Reset smoother and counters */
static void reset_vars(struct userdata *u) {
#ifdef USE_SMOOTHER_2
pa_smoother_2_reset(u->smoother, pa_rtclock_now());
#else
pa_smoother_reset(u->smoother, pa_rtclock_now(), true);
u->smoother_interval = SMOOTHER_MIN_INTERVAL;
u->last_smoother_update = 0;
#endif
u->read_count = 0;
u->first = true;
}
/* Called from IO context */
static void close_pcm(struct userdata *u) {
#ifdef USE_SMOOTHER_2
pa_smoother_2_pause(u->smoother, pa_rtclock_now());
#else
pa_smoother_pause(u->smoother, pa_rtclock_now());
#endif
/* Let's suspend */
snd_pcm_close(u->pcm_handle);
u->pcm_handle = NULL;
if (u->alsa_rtpoll_item) {
pa_rtpoll_item_free(u->alsa_rtpoll_item);
u->alsa_rtpoll_item = NULL;
}
}
static int try_recover(struct userdata *u, const char *call, int err) {
pa_assert(u);
pa_assert(call);
pa_assert(err < 0);
pa_log_debug("%s: %s", call, pa_alsa_strerror(err));
pa_assert(err != -EAGAIN);
if (err == -EPIPE)
pa_log_debug("%s: Buffer overrun!", call);
if (err == -ESTRPIPE)
pa_log_debug("%s: System suspended!", call);
if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) < 0) {
pa_log("%s: %s, trying to restart PCM", call, pa_alsa_strerror(err));
/* As a last measure, restart the PCM and inform the caller about it. */
close_pcm(u);
if (unsuspend(u, true) < 0)
return -1;
return 1;
}
reset_vars(u);
return 0;
}
static size_t check_left_to_record(struct userdata *u, size_t n_bytes, bool on_timeout) {
size_t left_to_record;
size_t rec_space = u->hwbuf_size - u->hwbuf_unused;
bool overrun = false;
/* We use <= instead of < for this check here because an overrun
* only happens after the last sample was processed, not already when
* it is removed from the buffer. This is particularly important
* when block transfer is used. */
if (n_bytes <= rec_space)
left_to_record = rec_space - n_bytes;
else {
/* We got a dropout. What a mess! */
left_to_record = 0;
overrun = true;
#ifdef DEBUG_TIMING
PA_DEBUG_TRAP;
#endif
if (pa_log_ratelimit(PA_LOG_INFO))
pa_log_info("Overrun!");
}
#ifdef DEBUG_TIMING
pa_log_debug("%0.2f ms left to record", (double) pa_bytes_to_usec(left_to_record, &u->source->sample_spec) / PA_USEC_PER_MSEC);
#endif
if (u->use_tsched) {
bool reset_not_before = true;
if (overrun || left_to_record < u->watermark_inc_threshold)
increase_watermark(u);
else if (left_to_record > u->watermark_dec_threshold) {
reset_not_before = false;
/* We decrease the watermark only if have actually
* been woken up by a timeout. If something else woke
* us up it's too easy to fulfill the deadlines... */
if (on_timeout)
decrease_watermark(u);
}
if (reset_not_before)
u->watermark_dec_not_before = 0;
}
return left_to_record;
}
static int mmap_read(struct userdata *u, pa_usec_t *sleep_usec, bool polled, bool on_timeout) {
bool work_done = false;
bool recovery_done = false;
pa_usec_t max_sleep_usec = 0, process_usec = 0;
size_t left_to_record;
unsigned j = 0;
pa_assert(u);
pa_source_assert_ref(u->source);
if (u->use_tsched)
hw_sleep_time(u, &max_sleep_usec, &process_usec);
for (;;) {
snd_pcm_sframes_t n;
size_t n_bytes;
int r;
bool after_avail = true;
if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
recovery_done = true;
if ((r = try_recover(u, "snd_pcm_avail", (int) n)) >= 0)
continue;
return r;
}
n_bytes = (size_t) n * u->frame_size;
#ifdef DEBUG_TIMING
pa_log_debug("avail: %lu", (unsigned long) n_bytes);
#endif
left_to_record = check_left_to_record(u, n_bytes, on_timeout);
on_timeout = false;
if (u->use_tsched)
if (!polled &&
pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2) {
#ifdef DEBUG_TIMING
pa_log_debug("Not reading, because too early.");
#endif
break;
}
if (PA_UNLIKELY(n_bytes <= 0)) {
if (polled)
PA_ONCE_BEGIN {
char *dn = pa_alsa_get_driver_name_by_pcm(u->pcm_handle);
pa_log(_("ALSA woke us up to read new data from the device, but there was actually nothing to read.\n"
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.\n"
"We were woken up with POLLIN set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail."),
pa_strnull(dn));
pa_xfree(dn);
} PA_ONCE_END;
#ifdef DEBUG_TIMING
pa_log_debug("Not reading, because not necessary.");
#endif
break;
}
if (++j > 10) {
#ifdef DEBUG_TIMING
pa_log_debug("Not filling up, because already too many iterations.");
#endif
break;
}
polled = false;
#ifdef DEBUG_TIMING
pa_log_debug("Reading");
#endif
for (;;) {
pa_memchunk chunk;
void *p;
int err;
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset, frames;
snd_pcm_sframes_t sframes;
frames = (snd_pcm_uframes_t) (n_bytes / u->frame_size);
/* pa_log_debug("%lu frames to read", (unsigned long) frames); */
if (PA_UNLIKELY((err = pa_alsa_safe_mmap_begin(u->pcm_handle, &areas, &offset, &frames, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
if (!after_avail && err == -EAGAIN)
break;
recovery_done = true;
if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0)
continue;
if (r == 1)
break;
return r;
}
/* Make sure that if these memblocks need to be copied they will fit into one slot */
frames = PA_MIN(frames, u->frames_per_block);
if (!after_avail && frames == 0)
break;
pa_assert(frames > 0);
after_avail = false;
/* Check these are multiples of 8 bit */
pa_assert((areas[0].first & 7) == 0);
pa_assert((areas[0].step & 7) == 0);
/* We assume a single interleaved memory buffer */
pa_assert((areas[0].first >> 3) == 0);
pa_assert((areas[0].step >> 3) == u->frame_size);
p = (uint8_t*) areas[0].addr + (offset * u->frame_size);
chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, true);
chunk.length = pa_memblock_get_length(chunk.memblock);
chunk.index = 0;
pa_source_post(u->source, &chunk);
pa_memblock_unref_fixed(chunk.memblock);
if (PA_UNLIKELY((sframes = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0)) {
recovery_done = true;
if ((r = try_recover(u, "snd_pcm_mmap_commit", (int) sframes)) == 0)
continue;
if (r == 1)
break;
return r;
}
work_done = true;
u->read_count += frames * u->frame_size;
#ifdef DEBUG_TIMING
pa_log_debug("Read %lu bytes (of possible %lu bytes)", (unsigned long) (frames * u->frame_size), (unsigned long) n_bytes);
#endif
if ((size_t) frames * u->frame_size >= n_bytes)
break;
n_bytes -= (size_t) frames * u->frame_size;
}
}
if (u->use_tsched) {
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec);
process_usec = u->tsched_watermark_usec;
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
/* If the PCM was recovered, it may need restarting. Reduce the sleep time
* to 0 to ensure immediate restart. */
if (recovery_done)
*sleep_usec = 0;
}
return work_done ? 1 : 0;
}
static int unix_read(struct userdata *u, pa_usec_t *sleep_usec, bool polled, bool on_timeout) {
int work_done = false;
bool recovery_done = false;
pa_usec_t max_sleep_usec = 0, process_usec = 0;
size_t left_to_record;
unsigned j = 0;
pa_assert(u);
pa_source_assert_ref(u->source);
if (u->use_tsched)
hw_sleep_time(u, &max_sleep_usec, &process_usec);
for (;;) {
snd_pcm_sframes_t n;
size_t n_bytes;
int r;
bool after_avail = true;
if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
recovery_done = true;
if ((r = try_recover(u, "snd_pcm_avail", (int) n)) >= 0)
continue;
return r;
}
n_bytes = (size_t) n * u->frame_size;
left_to_record = check_left_to_record(u, n_bytes, on_timeout);
on_timeout = false;
if (u->use_tsched)
if (!polled &&
pa_bytes_to_usec(left_to_record, &u->source->sample_spec) > process_usec+max_sleep_usec/2)
break;
if (PA_UNLIKELY(n_bytes <= 0)) {
if (polled)
PA_ONCE_BEGIN {
char *dn = pa_alsa_get_driver_name_by_pcm(u->pcm_handle);
pa_log(_("ALSA woke us up to read new data from the device, but there was actually nothing to read.\n"
"Most likely this is a bug in the ALSA driver '%s'. Please report this issue to the ALSA developers.\n"
"We were woken up with POLLIN set -- however a subsequent snd_pcm_avail() returned 0 or another value < min_avail."),
pa_strnull(dn));
pa_xfree(dn);
} PA_ONCE_END;
break;
}
if (++j > 10) {
#ifdef DEBUG_TIMING
pa_log_debug("Not filling up, because already too many iterations.");
#endif
break;
}
polled = false;
for (;;) {
void *p;
snd_pcm_sframes_t frames;
pa_memchunk chunk;
chunk.memblock = pa_memblock_new(u->core->mempool, (size_t) -1);
frames = (snd_pcm_sframes_t) (pa_memblock_get_length(chunk.memblock) / u->frame_size);
if (frames > (snd_pcm_sframes_t) (n_bytes/u->frame_size))
frames = (snd_pcm_sframes_t) (n_bytes/u->frame_size);
/* pa_log_debug("%lu frames to read", (unsigned long) n); */
p = pa_memblock_acquire(chunk.memblock);
frames = snd_pcm_readi(u->pcm_handle, (uint8_t*) p, (snd_pcm_uframes_t) frames);
pa_memblock_release(chunk.memblock);
if (PA_UNLIKELY(frames < 0)) {
pa_memblock_unref(chunk.memblock);
if (!after_avail && (int) frames == -EAGAIN)
break;
recovery_done = true;
if ((r = try_recover(u, "snd_pcm_readi", (int) frames)) == 0)
continue;
if (r == 1)
break;
return r;
}
if (!after_avail && frames == 0) {
pa_memblock_unref(chunk.memblock);
break;
}
pa_assert(frames > 0);
after_avail = false;
chunk.index = 0;
chunk.length = (size_t) frames * u->frame_size;
pa_source_post(u->source, &chunk);
pa_memblock_unref(chunk.memblock);
work_done = true;
u->read_count += frames * u->frame_size;
/* pa_log_debug("read %lu frames", (unsigned long) frames); */
if ((size_t) frames * u->frame_size >= n_bytes)
break;
n_bytes -= (size_t) frames * u->frame_size;
}
}
if (u->use_tsched) {
*sleep_usec = pa_bytes_to_usec(left_to_record, &u->source->sample_spec);
process_usec = u->tsched_watermark_usec;
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
/* If the PCM was recovered, it may need restarting. Reduce the sleep time
* to 0 to ensure immediate restart. */
if (recovery_done)
*sleep_usec = 0;
}
return work_done ? 1 : 0;
}
static void update_smoother(struct userdata *u) {
snd_pcm_sframes_t delay = 0;
uint64_t position;
int err;
pa_usec_t now1 = 0;
#ifndef USE_SMOOTHER_2
pa_usec_t now2;
#endif
snd_pcm_status_t *status;
snd_htimestamp_t htstamp = { 0, 0 };
snd_pcm_status_alloca(&status);
pa_assert(u);
pa_assert(u->pcm_handle);
/* Let's update the time smoother */
if (PA_UNLIKELY((err = pa_alsa_safe_delay(u->pcm_handle, status, &delay, u->hwbuf_size, &u->source->sample_spec, true)) < 0)) {
pa_log_warn("Failed to get delay: %s", pa_alsa_strerror(err));
return;
}
snd_pcm_status_get_htstamp(status, &htstamp);
now1 = pa_timespec_load(&htstamp);
/* Hmm, if the timestamp is 0, then it wasn't set and we take the current time */
if (now1 <= 0)
now1 = pa_rtclock_now();
position = u->read_count + ((uint64_t) delay * (uint64_t) u->frame_size);
#ifdef USE_SMOOTHER_2
pa_smoother_2_put(u->smoother, now1, position);
#else
/* check if the time since the last update is bigger than the interval */
if (u->last_smoother_update > 0)
if (u->last_smoother_update + u->smoother_interval > now1)
return;
now2 = pa_bytes_to_usec(position, &u->source->sample_spec);
pa_smoother_put(u->smoother, now1, now2);
u->last_smoother_update = now1;
/* exponentially increase the update interval up to the MAX limit */
u->smoother_interval = PA_MIN (u->smoother_interval * 2, SMOOTHER_MAX_INTERVAL);
#endif
}
static int64_t source_get_latency(struct userdata *u) {
int64_t delay;
pa_usec_t now1;
#ifndef USE_SMOOTHER_2
pa_usec_t now2;
#endif
pa_assert(u);
now1 = pa_rtclock_now();
#ifdef USE_SMOOTHER_2
delay = - pa_smoother_2_get_delay(u->smoother, now1, u->read_count);
#else
now2 = pa_smoother_get(u->smoother, now1);
delay = (int64_t) now2 - (int64_t) pa_bytes_to_usec(u->read_count, &u->source->sample_spec);
#endif
return delay;
}
static int build_pollfd(struct userdata *u) {
pa_assert(u);
pa_assert(u->pcm_handle);
if (u->alsa_rtpoll_item)
pa_rtpoll_item_free(u->alsa_rtpoll_item);
if (!(u->alsa_rtpoll_item = pa_alsa_build_pollfd(u->pcm_handle, u->rtpoll)))
return -1;
return 0;
}
/* Called from IO context */
static void suspend(struct userdata *u) {
pa_assert(u);
/* PCM may have been invalidated due to device failure.
* In that case, there is nothing to do. */
if (!u->pcm_handle)
return;
/* Close PCM device */
close_pcm(u);
pa_log_info("Device suspended...");
}
/* Called from IO context */
static int update_sw_params(struct userdata *u) {
snd_pcm_uframes_t avail_min;
int err;
pa_assert(u);
/* Use the full buffer if no one asked us for anything specific */
u->hwbuf_unused = 0;
if (u->use_tsched) {
pa_usec_t latency;
if ((latency = pa_source_get_requested_latency_within_thread(u->source)) != (pa_usec_t) -1) {
size_t b;
pa_log_debug("latency set to %0.2fms", (double) latency / PA_USEC_PER_MSEC);
b = pa_usec_to_bytes(latency, &u->source->sample_spec);
/* We need at least one sample in our buffer */
if (PA_UNLIKELY(b < u->frame_size))
b = u->frame_size;
u->hwbuf_unused = PA_LIKELY(b < u->hwbuf_size) ? (u->hwbuf_size - b) : 0;
}
fix_min_sleep_wakeup(u);
fix_tsched_watermark(u);
}
pa_log_debug("hwbuf_unused=%lu", (unsigned long) u->hwbuf_unused);
avail_min = 1;
if (u->use_tsched) {
pa_usec_t sleep_usec, process_usec;
hw_sleep_time(u, &sleep_usec, &process_usec);
avail_min += pa_usec_to_bytes(sleep_usec, &u->source->sample_spec) / u->frame_size;
}
pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min);
if ((err = pa_alsa_set_sw_params(u->pcm_handle, avail_min, !u->use_tsched)) < 0) {
pa_log("Failed to set software parameters: %s", pa_alsa_strerror(err));
return err;
}
return 0;
}
/* Called from IO Context on unsuspend */
static void update_size(struct userdata *u, pa_sample_spec *ss) {
pa_assert(u);
pa_assert(ss);
u->frame_size = pa_frame_size(ss);
u->frames_per_block = pa_mempool_block_size_max(u->core->mempool) / u->frame_size;
/* use initial values including module arguments */
u->fragment_size = u->initial_info.fragment_size;
u->hwbuf_size = u->initial_info.nfrags * u->fragment_size;
u->tsched_size = u->initial_info.tsched_size;
u->tsched_watermark = u->initial_info.tsched_watermark;
u->tsched_watermark_ref = u->tsched_watermark;
pa_log_info("Updated frame_size %zu, frames_per_block %lu, fragment_size %zu, hwbuf_size %zu, tsched(size %zu, watermark %zu)",
u->frame_size, (unsigned long) u->frames_per_block, u->fragment_size, u->hwbuf_size, u->tsched_size, u->tsched_watermark);
}
/* Called from IO context */
static int unsuspend(struct userdata *u, bool recovering) {
pa_sample_spec ss;
int err, i;
bool b, d;
snd_pcm_uframes_t period_frames, buffer_frames;
snd_pcm_uframes_t tsched_frames = 0;
bool frame_size_changed = false;
pa_assert(u);
pa_assert(!u->pcm_handle);
pa_log_info("Trying resume...");
/*
* On some machines, during the system suspend and resume, the thread_func could receive
* POLLERR events before the dev nodes in /dev/snd/ are accessible, and thread_func calls
* the unsuspend() to try to recover the PCM, this will make the snd_pcm_open() fail, here
* we add msleep and retry to make sure those nodes are accessible.
*/
for (i = 0; i < 4; i++) {
if ((err = snd_pcm_open(&u->pcm_handle, u->device_name, SND_PCM_STREAM_CAPTURE,
SND_PCM_NONBLOCK|
SND_PCM_NO_AUTO_RESAMPLE|
SND_PCM_NO_AUTO_CHANNELS|
SND_PCM_NO_AUTO_FORMAT)) < 0 && recovering)
pa_msleep(25);
else
break;
}
if (err < 0) {
pa_log("Error opening PCM device %s: %s", u->device_name, pa_alsa_strerror(err));
goto fail;
}
if (pa_frame_size(&u->source->sample_spec) != u->frame_size) {
update_size(u, &u->source->sample_spec);
tsched_frames = u->tsched_size / u->frame_size;
frame_size_changed = true;
}
ss = u->source->sample_spec;
period_frames = u->fragment_size / u->frame_size;
buffer_frames = u->hwbuf_size / u->frame_size;
b = u->use_mmap;
d = u->use_tsched;
if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &period_frames, &buffer_frames, tsched_frames, &b, &d, true)) < 0) {
pa_log("Failed to set hardware parameters: %s", pa_alsa_strerror(err));
goto fail;
}
if (b != u->use_mmap || d != u->use_tsched) {
pa_log_warn("Resume failed, couldn't get original access mode.");
goto fail;
}
if (!pa_sample_spec_equal(&ss, &u->source->sample_spec)) {
pa_log_warn("Resume failed, couldn't restore original sample settings.");
goto fail;
}
if (frame_size_changed) {
u->fragment_size = (size_t)(period_frames * u->frame_size);
u->hwbuf_size = (size_t)(buffer_frames * u->frame_size);
pa_proplist_setf(u->source->proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%zu", u->hwbuf_size);
pa_proplist_setf(u->source->proplist, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE, "%zu", u->fragment_size);
} else if (period_frames * u->frame_size != u->fragment_size ||
buffer_frames * u->frame_size != u->hwbuf_size) {
pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %zu/%zu, New %lu/%lu)",
u->hwbuf_size, u->fragment_size,
(unsigned long) buffer_frames * u->frame_size, (unsigned long) period_frames * u->frame_size);
goto fail;
}
if (update_sw_params(u) < 0)
goto fail;
if (build_pollfd(u) < 0)
goto fail;
/* FIXME: We need to reload the volume somehow */
reset_vars(u);
/* reset the watermark to the value defined when source was created */
if (u->use_tsched && !recovering)
reset_watermark(u, u->tsched_watermark_ref, &u->source->sample_spec, true);
pa_log_info("Resumed successfully...");
return 0;
fail:
if (u->pcm_handle) {
snd_pcm_close(u->pcm_handle);
u->pcm_handle = NULL;
}
return -PA_ERR_IO;
}
/* Called from the IO thread or the main thread depending on whether deferred
* volume is enabled or not (with deferred volume all mixer handling is done
* from the IO thread).
*
* Sets the mixer settings to match the current source and port state (the port
* is given as an argument, because active_port may still point to the old
* port, if we're switching ports). */
static void sync_mixer(struct userdata *u, pa_device_port *port) {
pa_alsa_setting *setting = NULL;
pa_assert(u);
if (!u->mixer_path)
return;
/* port may be NULL, because if we use a synthesized mixer path, then the
* source has no ports. */
if (port && !u->ucm_context) {
pa_alsa_port_data *data;
data = PA_DEVICE_PORT_DATA(port);
setting = data->setting;
}
pa_alsa_path_select(u->mixer_path, setting, u->mixer_handle, u->source->muted);
if (u->source->set_mute)
u->source->set_mute(u->source);
if (u->source->flags & PA_SOURCE_DEFERRED_VOLUME) {
if (u->source->write_volume)
u->source->write_volume(u->source);
} else {
if (u->source->set_volume)
u->source->set_volume(u->source);
}
}
/* Called from IO context */
static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
struct userdata *u = PA_SOURCE(o)->userdata;
switch (code) {
case PA_SOURCE_MESSAGE_GET_LATENCY: {
int64_t r = 0;
if (u->pcm_handle)
r = source_get_latency(u);
*((int64_t*) data) = r;
return 0;
}
case SOURCE_MESSAGE_SYNC_MIXER: {
pa_device_port *port = data;
sync_mixer(u, port);
return 0;
}
}
return pa_source_process_msg(o, code, data, offset, chunk);
}
/* Called from main context */
static int source_set_state_in_main_thread_cb(pa_source *s, pa_source_state_t new_state, pa_suspend_cause_t new_suspend_cause) {
pa_source_state_t old_state;
struct userdata *u;
pa_source_assert_ref(s);
pa_assert_se(u = s->userdata);
/* When our session becomes active, we need to sync the mixer, because
* another user may have changed the mixer settings.
*
* If deferred volume is enabled, the syncing is done in the
* set_state_in_io_thread() callback instead. */
if (!(s->flags & PA_SOURCE_DEFERRED_VOLUME)
&& (s->suspend_cause & PA_SUSPEND_SESSION)
&& !(new_suspend_cause & PA_SUSPEND_SESSION))
sync_mixer(u, s->active_port);
old_state = u->source->state;
if (PA_SOURCE_IS_OPENED(old_state) && new_state == PA_SOURCE_SUSPENDED)
reserve_done(u);
else if (old_state == PA_SOURCE_SUSPENDED && PA_SOURCE_IS_OPENED(new_state))
if (reserve_init(u, u->device_name) < 0)
return -PA_ERR_BUSY;
return 0;
}
/* Called from the IO thread. */
static int source_set_state_in_io_thread_cb(pa_source *s, pa_source_state_t new_state, pa_suspend_cause_t new_suspend_cause) {
struct userdata *u;
pa_assert(s);
pa_assert_se(u = s->userdata);
/* When our session becomes active, we need to sync the mixer, because
* another user may have changed the mixer settings.
*
* If deferred volume is disabled, the syncing is done in the
* set_state_in_main_thread() callback instead. */
if ((s->flags & PA_SOURCE_DEFERRED_VOLUME)
&& (s->suspend_cause & PA_SUSPEND_SESSION)
&& !(new_suspend_cause & PA_SUSPEND_SESSION))
sync_mixer(u, s->active_port);
/* It may be that only the suspend cause is changing, in which case there's
* nothing more to do. */
if (new_state == s->thread_info.state)
return 0;
switch (new_state) {
case PA_SOURCE_SUSPENDED: {
pa_assert(PA_SOURCE_IS_OPENED(s->thread_info.state));
suspend(u);
break;
}
case PA_SOURCE_IDLE:
case PA_SOURCE_RUNNING: {
int r;
if (s->thread_info.state == PA_SOURCE_INIT) {
if (build_pollfd(u) < 0)
/* FIXME: This will cause an assertion failure, because
* with the current design pa_source_put() is not allowed
* to fail and pa_source_put() has no fallback code that
* would start the source suspended if opening the device
* fails. */
return -PA_ERR_IO;
}
if (s->thread_info.state == PA_SOURCE_SUSPENDED) {
if ((r = unsuspend(u, false)) < 0)
return r;
}
break;
}
case PA_SOURCE_UNLINKED:
case PA_SOURCE_INIT:
case PA_SOURCE_INVALID_STATE:
;
}
return 0;
}
static int ctl_mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
struct userdata *u = snd_mixer_elem_get_callback_private(elem);
pa_assert(u);
pa_assert(u->mixer_handle);
if (mask == SND_CTL_EVENT_MASK_REMOVE)
return 0;
if (!PA_SOURCE_IS_LINKED(u->source->state))
return 0;
if (u->source->suspend_cause & PA_SUSPEND_SESSION)
return 0;
if (mask & SND_CTL_EVENT_MASK_VALUE) {
pa_source_get_volume(u->source, true);
pa_source_get_mute(u->source, true);
}
return 0;
}
static int io_mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
struct userdata *u = snd_mixer_elem_get_callback_private(elem);
pa_assert(u);
pa_assert(u->mixer_handle);
if (mask == SND_CTL_EVENT_MASK_REMOVE)
return 0;
if (u->source->suspend_cause & PA_SUSPEND_SESSION)
return 0;
if (mask & SND_CTL_EVENT_MASK_VALUE)
pa_source_update_volume_and_mute(u->source);
return 0;
}
static void source_get_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_cvolume r;
char volume_buf[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
pa_assert(u);
pa_assert(u->mixer_path);
pa_assert(u->mixer_handle);
if (pa_alsa_path_get_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &r) < 0)
return;
/* Shift down by the base volume, so that 0dB becomes maximum volume */
pa_sw_cvolume_multiply_scalar(&r, &r, s->base_volume);
pa_log_debug("Read hardware volume: %s",
pa_cvolume_snprint_verbose(volume_buf, sizeof(volume_buf), &r, &s->channel_map, u->mixer_path->has_dB));
if (pa_cvolume_equal(&u->hardware_volume, &r))
return;
s->real_volume = u->hardware_volume = r;
/* Hmm, so the hardware volume changed, let's reset our software volume */
if (u->mixer_path->has_dB)
pa_source_set_soft_volume(s, NULL);
}
static void source_set_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_cvolume r;
char volume_buf[PA_CVOLUME_SNPRINT_VERBOSE_MAX];
bool deferred_volume = !!(s->flags & PA_SOURCE_DEFERRED_VOLUME);
bool write_to_hw = !deferred_volume;
pa_assert(u);
pa_assert(u->mixer_path);
pa_assert(u->mixer_handle);
/* Shift up by the base volume */
pa_sw_cvolume_divide_scalar(&r, &s->real_volume, s->base_volume);
/* If the set_volume() is called because of ucm active_port changing, the
* volume should be written to hw immediately, otherwise this volume will be
* overridden by calling get_volume_cb() which is called by
* _disdev/_enadev() -> io_mixer_callback() */
if (u->ucm_context && s->port_changing)
write_to_hw = true;
if (pa_alsa_path_set_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &r, deferred_volume, write_to_hw) < 0)
return;
/* Shift down by the base volume, so that 0dB becomes maximum volume */
pa_sw_cvolume_multiply_scalar(&r, &r, s->base_volume);
u->hardware_volume = r;
if (u->mixer_path->has_dB) {
pa_cvolume new_soft_volume;
bool accurate_enough;
/* Match exactly what the user requested by software */
pa_sw_cvolume_divide(&new_soft_volume, &s->real_volume, &u->hardware_volume);
/* If the adjustment to do in software is only minimal we
* can skip it. That saves us CPU at the expense of a bit of
* accuracy */
accurate_enough =
(pa_cvolume_min(&new_soft_volume) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
(pa_cvolume_max(&new_soft_volume) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
pa_log_debug("Requested volume: %s",
pa_cvolume_snprint_verbose(volume_buf, sizeof(volume_buf), &s->real_volume, &s->channel_map, true));
pa_log_debug("Got hardware volume: %s",
pa_cvolume_snprint_verbose(volume_buf, sizeof(volume_buf), &u->hardware_volume, &s->channel_map, true));
pa_log_debug("Calculated software volume: %s (accurate-enough=%s)",
pa_cvolume_snprint_verbose(volume_buf, sizeof(volume_buf), &new_soft_volume, &s->channel_map, true),
pa_yes_no(accurate_enough));
if (!accurate_enough)
s->soft_volume = new_soft_volume;
} else {
pa_log_debug("Wrote hardware volume: %s",
pa_cvolume_snprint_verbose(volume_buf, sizeof(volume_buf), &r, &s->channel_map, false));
/* We can't match exactly what the user requested, hence let's
* at least tell the user about it */
s->real_volume = r;
}
}
static void source_write_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_cvolume hw_vol = s->thread_info.current_hw_volume;
pa_assert(u);
pa_assert(u->mixer_path);
pa_assert(u->mixer_handle);
pa_assert(s->flags & PA_SOURCE_DEFERRED_VOLUME);
/* Shift up by the base volume */
pa_sw_cvolume_divide_scalar(&hw_vol, &hw_vol, s->base_volume);
if (pa_alsa_path_set_volume(u->mixer_path, u->mixer_handle, &s->channel_map, &hw_vol, true, true) < 0)
pa_log_error("Writing HW volume failed");
else {
pa_cvolume tmp_vol;
bool accurate_enough;
/* Shift down by the base volume, so that 0dB becomes maximum volume */
pa_sw_cvolume_multiply_scalar(&hw_vol, &hw_vol, s->base_volume);
pa_sw_cvolume_divide(&tmp_vol, &hw_vol, &s->thread_info.current_hw_volume);
accurate_enough =
(pa_cvolume_min(&tmp_vol) >= (PA_VOLUME_NORM - VOLUME_ACCURACY)) &&
(pa_cvolume_max(&tmp_vol) <= (PA_VOLUME_NORM + VOLUME_ACCURACY));
if (!accurate_enough) {
char volume_buf[2][PA_CVOLUME_SNPRINT_VERBOSE_MAX];
pa_log_debug("Written HW volume did not match with the request: %s (request) != %s",
pa_cvolume_snprint_verbose(volume_buf[0],
sizeof(volume_buf[0]),
&s->thread_info.current_hw_volume,
&s->channel_map,
true),
pa_cvolume_snprint_verbose(volume_buf[1], sizeof(volume_buf[1]), &hw_vol, &s->channel_map, true));
}
}
}
static int source_get_mute_cb(pa_source *s, bool *mute) {
struct userdata *u = s->userdata;
pa_assert(u);
pa_assert(u->mixer_path);
pa_assert(u->mixer_handle);
if (pa_alsa_path_get_mute(u->mixer_path, u->mixer_handle, mute) < 0)
return -1;
return 0;
}
static void source_set_mute_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_assert(u);
pa_assert(u->mixer_path);
pa_assert(u->mixer_handle);
pa_alsa_path_set_mute(u->mixer_path, u->mixer_handle, s->muted);
}
static void mixer_volume_init(struct userdata *u) {
pa_assert(u);
if (!u->mixer_path || !u->mixer_path->has_volume) {
pa_source_set_write_volume_callback(u->source, NULL);
pa_source_set_get_volume_callback(u->source, NULL);
pa_source_set_set_volume_callback(u->source, NULL);
pa_log_info("Driver does not support hardware volume control, falling back to software volume control.");
} else {
pa_source_set_get_volume_callback(u->source, source_get_volume_cb);
pa_source_set_set_volume_callback(u->source, source_set_volume_cb);
if (u->mixer_path->has_dB && u->deferred_volume) {
pa_source_set_write_volume_callback(u->source, source_write_volume_cb);
pa_log_info("Successfully enabled deferred volume.");
} else
pa_source_set_write_volume_callback(u->source, NULL);
if (u->mixer_path->has_dB) {
pa_source_enable_decibel_volume(u->source, true);
pa_log_info("Hardware volume ranges from %0.2f dB to %0.2f dB.", u->mixer_path->min_dB, u->mixer_path->max_dB);
u->source->base_volume = pa_sw_volume_from_dB(-u->mixer_path->max_dB);
u->source->n_volume_steps = PA_VOLUME_NORM+1;
pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(u->source->base_volume));
} else {
pa_source_enable_decibel_volume(u->source, false);
pa_log_info("Hardware volume ranges from %li to %li.", u->mixer_path->min_volume, u->mixer_path->max_volume);
u->source->base_volume = PA_VOLUME_NORM;
u->source->n_volume_steps = u->mixer_path->max_volume - u->mixer_path->min_volume + 1;
}
pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->mixer_path->has_dB ? "supported" : "not supported");
}
if (!u->mixer_path || !u->mixer_path->has_mute) {
pa_source_set_get_mute_callback(u->source, NULL);
pa_source_set_set_mute_callback(u->source, NULL);
pa_log_info("Driver does not support hardware mute control, falling back to software mute control.");
} else {
pa_source_set_get_mute_callback(u->source, source_get_mute_cb);
pa_source_set_set_mute_callback(u->source, source_set_mute_cb);
pa_log_info("Using hardware mute control.");
}
}
static int source_set_port_ucm_cb(pa_source *s, pa_device_port *p) {
struct userdata *u = s->userdata;
pa_alsa_ucm_port_data *data;
pa_assert(u);
pa_assert(p);
pa_assert(u->ucm_context);
data = PA_DEVICE_PORT_DATA(p);
u->mixer_path = data->path;
mixer_volume_init(u);
if (s->flags & PA_SOURCE_DEFERRED_VOLUME)
pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_SYNC_MIXER, p, 0, NULL);
else
sync_mixer(u, p);
return pa_alsa_ucm_set_port(u->ucm_context, p);
}
static int source_set_port_cb(pa_source *s, pa_device_port *p) {
struct userdata *u = s->userdata;
pa_alsa_port_data *data;
pa_assert(u);
pa_assert(p);
pa_assert(u->mixer_handle);
pa_assert(!u->ucm_context);
data = PA_DEVICE_PORT_DATA(p);
pa_assert_se(u->mixer_path = data->path);
mixer_volume_init(u);
if (s->flags & PA_SOURCE_DEFERRED_VOLUME)
pa_asyncmsgq_send(u->source->asyncmsgq, PA_MSGOBJECT(u->source), SOURCE_MESSAGE_SYNC_MIXER, p, 0, NULL);
else
sync_mixer(u, p);
return 0;
}
static void source_update_requested_latency_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_assert(u);
pa_assert(u->use_tsched); /* only when timer scheduling is used
* we can dynamically adjust the
* latency */
if (!u->pcm_handle)
return;
update_sw_params(u);
}
static int source_reconfigure_cb(pa_source *s, pa_sample_spec *spec, pa_channel_map *map, bool passthrough) {
struct userdata *u = s->userdata;
int i;
bool format_supported = false;
bool rate_supported = false;
#ifdef USE_SMOOTHER_2
pa_sample_spec effective_spec;
#endif
pa_assert(u);
#ifdef USE_SMOOTHER_2
effective_spec.channels = s->sample_spec.channels;
#endif
for (i = 0; u->supported_formats[i] != PA_SAMPLE_MAX; i++) {
if (u->supported_formats[i] == spec->format) {
pa_source_set_sample_format(u->source, spec->format);
#ifdef USE_SMOOTHER_2
effective_spec.format = spec->format;
#endif
format_supported = true;
break;
}
}
if (!format_supported) {
pa_log_info("Source does not support sample format of %s, set it to a verified value",
pa_sample_format_to_string(spec->format));
pa_source_set_sample_format(u->source, u->verified_sample_spec.format);
#ifdef USE_SMOOTHER_2
effective_spec.format = u->verified_sample_spec.format;
#endif
}
for (i = 0; u->supported_rates[i]; i++) {
if (u->supported_rates[i] == spec->rate) {
pa_source_set_sample_rate(u->source, spec->rate);
#ifdef USE_SMOOTHER_2
effective_spec.rate = spec->rate;
#endif
rate_supported = true;
break;
}
}
if (!rate_supported) {
pa_log_info("Source does not support sample rate of %u, set it to a verfied value", spec->rate);
pa_source_set_sample_rate(u->source, u->verified_sample_spec.rate);
#ifdef USE_SMOOTHER_2
effective_spec.rate = u->verified_sample_spec.rate;
#endif
}
#ifdef USE_SMOOTHER_2
pa_smoother_2_set_sample_spec(u->smoother, pa_rtclock_now(), &effective_spec);
#endif
return 0;
}
static void thread_func(void *userdata) {
struct userdata *u = userdata;
unsigned short revents = 0;
pa_assert(u);
pa_log_debug("Thread starting up");
if (u->core->realtime_scheduling)
pa_thread_make_realtime(u->core->realtime_priority);
pa_thread_mq_install(&u->thread_mq);
for (;;) {
int ret;
pa_usec_t rtpoll_sleep = 0, real_sleep;
#ifdef DEBUG_TIMING
pa_log_debug("Loop");
#endif
/* Read some data and pass it to the sources */
if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) {
int work_done;
pa_usec_t sleep_usec = 0;
bool on_timeout = pa_rtpoll_timer_elapsed(u->rtpoll);
if (u->first) {
pa_log_info("Starting capture.");
snd_pcm_start(u->pcm_handle);
#ifdef USE_SMOOTHER_2
pa_smoother_2_resume(u->smoother, pa_rtclock_now());
#else
pa_smoother_resume(u->smoother, pa_rtclock_now(), true);
#endif
u->first = false;
}
if (u->use_mmap)
work_done = mmap_read(u, &sleep_usec, revents & POLLIN, on_timeout);
else
work_done = unix_read(u, &sleep_usec, revents & POLLIN, on_timeout);
if (work_done < 0)
goto fail;
/* pa_log_debug("work_done = %i", work_done); */
if (work_done)
update_smoother(u);
if (u->use_tsched) {
pa_usec_t cusec;
/* OK, the capture buffer is now empty, let's
* calculate when to wake up next */
/* pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) sleep_usec / PA_USEC_PER_MSEC); */
/* Convert from the sound card time domain to the
* system time domain */
#ifdef USE_SMOOTHER_2
cusec = pa_smoother_2_translate(u->smoother, sleep_usec);
#else
cusec = pa_smoother_translate(u->smoother, pa_rtclock_now(), sleep_usec);
#endif
/* pa_log_debug("Waking up in %0.2fms (system clock).", (double) cusec / PA_USEC_PER_MSEC); */
/* We don't trust the conversion, so we wake up whatever comes first */
rtpoll_sleep = PA_MIN(sleep_usec, cusec);
}
}
if (u->source->flags & PA_SOURCE_DEFERRED_VOLUME) {
pa_usec_t volume_sleep;
pa_source_volume_change_apply(u->source, &volume_sleep);
if (volume_sleep > 0) {
if (rtpoll_sleep > 0)
rtpoll_sleep = PA_MIN(volume_sleep, rtpoll_sleep);
else
rtpoll_sleep = volume_sleep;
}
}
if (rtpoll_sleep > 0) {
pa_rtpoll_set_timer_relative(u->rtpoll, rtpoll_sleep);
real_sleep = pa_rtclock_now();
}
else
pa_rtpoll_set_timer_disabled(u->rtpoll);
/* Hmm, nothing to do. Let's sleep */
if ((ret = pa_rtpoll_run(u->rtpoll)) < 0)
goto fail;
if (rtpoll_sleep > 0) {
real_sleep = pa_rtclock_now() - real_sleep;
#ifdef DEBUG_TIMING
pa_log_debug("Expected sleep: %0.2fms, real sleep: %0.2fms (diff %0.2f ms)",
(double) rtpoll_sleep / PA_USEC_PER_MSEC, (double) real_sleep / PA_USEC_PER_MSEC,
(double) ((int64_t) real_sleep - (int64_t) rtpoll_sleep) / PA_USEC_PER_MSEC);
#endif
if (u->use_tsched && real_sleep > rtpoll_sleep + u->tsched_watermark_usec)
pa_log_info("Scheduling delay of %0.2f ms > %0.2f ms, you might want to investigate this to improve latency...",
(double) (real_sleep - rtpoll_sleep) / PA_USEC_PER_MSEC,
(double) (u->tsched_watermark_usec) / PA_USEC_PER_MSEC);
}
if (u->source->flags & PA_SOURCE_DEFERRED_VOLUME)
pa_source_volume_change_apply(u->source, NULL);
if (ret == 0)
goto finish;
/* Tell ALSA about this and process its response */
if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) {
struct pollfd *pollfd;
int err;
unsigned n;
pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, &n);
if ((err = snd_pcm_poll_descriptors_revents(u->pcm_handle, pollfd, n, &revents)) < 0) {
pa_log("snd_pcm_poll_descriptors_revents() failed: %s", pa_alsa_strerror(err));
goto fail;
}
if (revents & ~POLLIN) {
if ((err = pa_alsa_recover_from_poll(u->pcm_handle, revents)) < 0)
goto fail;
/* Stream needs to be restarted */
if (err == 1) {
close_pcm(u);
if (unsuspend(u, true) < 0)
goto fail;
} else
reset_vars(u);
revents = 0;
} else if (revents && u->use_tsched && pa_log_ratelimit(PA_LOG_DEBUG))
pa_log_debug("Wakeup from ALSA!");
} else
revents = 0;
}
fail:
/* If this was no regular exit from the loop we have to continue
* processing messages until we received PA_MESSAGE_SHUTDOWN */
pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
finish:
pa_log_debug("Thread shutting down");
}
static void set_source_name(pa_source_new_data *data, pa_modargs *ma, const char *device_id, const char *device_name, pa_alsa_mapping *mapping) {
const char *n;
char *t;
pa_assert(data);
pa_assert(ma);
pa_assert(device_name);
if ((n = pa_modargs_get_value(ma, "source_name", NULL))) {
pa_source_new_data_set_name(data, n);
data->namereg_fail = true;
return;
}
if ((n = pa_modargs_get_value(ma, "name", NULL)))
data->namereg_fail = true;
else {
n = device_id ? device_id : device_name;
data->namereg_fail = false;
}
if (mapping)
t = pa_sprintf_malloc("alsa_input.%s.%s", n, mapping->name);
else
t = pa_sprintf_malloc("alsa_input.%s", n);
pa_source_new_data_set_name(data, t);
pa_xfree(t);
}
static void find_mixer(struct userdata *u, pa_alsa_mapping *mapping, const char *element, bool ignore_dB) {
const char *mdev;
if (!mapping && !element)
return;
if (!element && mapping && pa_alsa_path_set_is_empty(mapping->input_path_set))
return;
u->mixers = pa_hashmap_new_full(pa_idxset_string_hash_func, pa_idxset_string_compare_func,
NULL, (pa_free_cb_t) pa_alsa_mixer_free);
mdev = mapping ? pa_proplist_gets(mapping->proplist, "alsa.mixer_device") : NULL;
if (mdev) {
u->mixer_handle = pa_alsa_open_mixer_by_name(u->mixers, mdev, false);
} else {
u->mixer_handle = pa_alsa_open_mixer_for_pcm(u->mixers, u->pcm_handle, false);
}
if (!u->mixer_handle) {
pa_log_info("Failed to find a working mixer device.");
return;
}
if (element) {
if (!(u->mixer_path = pa_alsa_path_synthesize(element, PA_ALSA_DIRECTION_INPUT)))
goto fail;
if (pa_alsa_path_probe(u->mixer_path, NULL, u->mixer_handle, ignore_dB) < 0)
goto fail;
pa_log_debug("Probed mixer path %s:", u->mixer_path->name);
pa_alsa_path_dump(u->mixer_path);
} else {
u->mixer_path_set = mapping->input_path_set;
}
return;
fail:
if (u->mixer_path) {
pa_alsa_path_free(u->mixer_path);
u->mixer_path = NULL;
}
u->mixer_handle = NULL;
pa_hashmap_free(u->mixers);
u->mixers = NULL;
}
static int setup_mixer(struct userdata *u, bool ignore_dB) {
bool need_mixer_callback = false;
pa_assert(u);
/* This code is before the u->mixer_handle check, because if the UCM
* configuration doesn't specify volume or mute controls, u->mixer_handle
* will be NULL, but the UCM device enable sequence will still need to be
* executed. */
if (u->source->active_port && u->ucm_context) {
if (pa_alsa_ucm_set_port(u->ucm_context, u->source->active_port) < 0)
return -1;
}
if (!u->mixer_handle)
return 0;
if (u->source->active_port) {
if (!u->ucm_context) {
pa_alsa_port_data *data;
/* We have a list of supported paths, so let's activate the
* one that has been chosen as active */
data = PA_DEVICE_PORT_DATA(u->source->active_port);
u->mixer_path = data->path;
pa_alsa_path_select(data->path, data->setting, u->mixer_handle, u->source->muted);
} else {
pa_alsa_ucm_port_data *data;
data = PA_DEVICE_PORT_DATA(u->source->active_port);
/* Now activate volume controls, if any */
if (data->path) {
u->mixer_path = data->path;
pa_alsa_path_select(u->mixer_path, NULL, u->mixer_handle, u->source->muted);
}
}
} else {
if (!u->mixer_path && u->mixer_path_set)
u->mixer_path = pa_hashmap_first(u->mixer_path_set->paths);
if (u->mixer_path) {
/* Hmm, we have only a single path, then let's activate it */
pa_alsa_path_select(u->mixer_path, u->mixer_path->settings, u->mixer_handle, u->source->muted);
} else
return 0;
}
mixer_volume_init(u);
/* Will we need to register callbacks? */
if (u->mixer_path_set && u->mixer_path_set->paths) {
pa_alsa_path *p;
void *state;
PA_HASHMAP_FOREACH(p, u->mixer_path_set->paths, state) {
if (p->has_volume || p->has_mute)
need_mixer_callback = true;
}
}
else if (u->mixer_path)
need_mixer_callback = u->mixer_path->has_volume || u->mixer_path->has_mute;
if (need_mixer_callback) {
int (*mixer_callback)(snd_mixer_elem_t *, unsigned int);
if (u->source->flags & PA_SOURCE_DEFERRED_VOLUME) {
u->mixer_pd = pa_alsa_mixer_pdata_new();
mixer_callback = io_mixer_callback;
if (pa_alsa_set_mixer_rtpoll(u->mixer_pd, u->mixer_handle, u->rtpoll) < 0) {
pa_log("Failed to initialize file descriptor monitoring");
return -1;
}
} else {
u->mixer_fdl = pa_alsa_fdlist_new();
mixer_callback = ctl_mixer_callback;
if (pa_alsa_fdlist_set_handle(u->mixer_fdl, u->mixer_handle, NULL, u->core->mainloop) < 0) {
pa_log("Failed to initialize file descriptor monitoring");
return -1;
}
}
if (u->mixer_path_set)
pa_alsa_path_set_set_callback(u->mixer_path_set, u->mixer_handle, mixer_callback, u);
else
pa_alsa_path_set_callback(u->mixer_path, u->mixer_handle, mixer_callback, u);
}
return 0;
}
pa_source *pa_alsa_source_new(pa_module *m, pa_modargs *ma, const char*driver, pa_card *card, pa_alsa_mapping *mapping) {
struct userdata *u = NULL;
const char *dev_id = NULL, *key, *mod_name;
pa_sample_spec ss;
char *thread_name = NULL;
uint32_t alternate_sample_rate;
pa_channel_map map;
uint32_t nfrags, frag_size, buffer_size, tsched_size, tsched_watermark;
snd_pcm_uframes_t period_frames, buffer_frames, tsched_frames;
size_t frame_size;
bool use_mmap = true;
bool use_tsched = true;
bool ignore_dB = false;
bool namereg_fail = false;
bool deferred_volume = false;
bool fixed_latency_range = false;
bool b;
bool d;
bool avoid_resampling;
pa_source_new_data data;
bool volume_is_set;
bool mute_is_set;
pa_alsa_profile_set *profile_set = NULL;
void *state;
pa_assert(m);
pa_assert(ma);
ss = m->core->default_sample_spec;
map = m->core->default_channel_map;
avoid_resampling = m->core->avoid_resampling;
/* Pick sample spec overrides from the mapping, if any */
if (mapping) {
if (mapping->sample_spec.format != PA_SAMPLE_INVALID)
ss.format = mapping->sample_spec.format;
if (mapping->sample_spec.rate != 0)
ss.rate = mapping->sample_spec.rate;
if (mapping->sample_spec.channels != 0) {
ss.channels = mapping->sample_spec.channels;
if (pa_channel_map_valid(&mapping->channel_map))
pa_assert(pa_channel_map_compatible(&mapping->channel_map, &ss));
}
}
/* Override with modargs if provided */
if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
pa_log("Failed to parse sample specification and channel map");
goto fail;
}
alternate_sample_rate = m->core->alternate_sample_rate;
if (pa_modargs_get_alternate_sample_rate(ma, &alternate_sample_rate) < 0) {
pa_log("Failed to parse alternate sample rate");
goto fail;
}
frame_size = pa_frame_size(&ss);
nfrags = m->core->default_n_fragments;
frag_size = (uint32_t) pa_usec_to_bytes(m->core->default_fragment_size_msec*PA_USEC_PER_MSEC, &ss);
if (frag_size <= 0)
frag_size = (uint32_t) frame_size;
tsched_size = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC, &ss);
tsched_watermark = (uint32_t) pa_usec_to_bytes(DEFAULT_TSCHED_WATERMARK_USEC, &ss);
if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 ||
pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0 ||
pa_modargs_get_value_u32(ma, "tsched_buffer_size", &tsched_size) < 0 ||
pa_modargs_get_value_u32(ma, "tsched_buffer_watermark", &tsched_watermark) < 0) {
pa_log("Failed to parse buffer metrics");
goto fail;
}
buffer_size = nfrags * frag_size;
period_frames = frag_size/frame_size;
buffer_frames = buffer_size/frame_size;
tsched_frames = tsched_size/frame_size;
if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) {
pa_log("Failed to parse mmap argument.");
goto fail;
}
if (pa_modargs_get_value_boolean(ma, "tsched", &use_tsched) < 0) {
pa_log("Failed to parse tsched argument.");
goto fail;
}
if (pa_modargs_get_value_boolean(ma, "ignore_dB", &ignore_dB) < 0) {
pa_log("Failed to parse ignore_dB argument.");
goto fail;
}
deferred_volume = m->core->deferred_volume;
if (pa_modargs_get_value_boolean(ma, "deferred_volume", &deferred_volume) < 0) {
pa_log("Failed to parse deferred_volume argument.");
goto fail;
}
if (pa_modargs_get_value_boolean(ma, "fixed_latency_range", &fixed_latency_range) < 0) {
pa_log("Failed to parse fixed_latency_range argument.");
goto fail;
}
use_tsched = pa_alsa_may_tsched(use_tsched);
u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
u->use_mmap = use_mmap;
u->use_tsched = use_tsched;
u->tsched_size = tsched_size;
u->initial_info.nfrags = (size_t) nfrags;
u->initial_info.fragment_size = (size_t) frag_size;
u->initial_info.tsched_size = (size_t) tsched_size;
u->initial_info.tsched_watermark = (size_t) tsched_watermark;
u->deferred_volume = deferred_volume;
u->fixed_latency_range = fixed_latency_range;
u->first = true;
u->rtpoll = pa_rtpoll_new();
if (pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll) < 0) {
pa_log("pa_thread_mq_init() failed.");
goto fail;
}
#ifndef USE_SMOOTHER_2
u->smoother = pa_smoother_new(
SMOOTHER_ADJUST_USEC,
SMOOTHER_WINDOW_USEC,
true,
true,
5,
pa_rtclock_now(),
true);
u->smoother_interval = SMOOTHER_MIN_INTERVAL;
#endif
/* use ucm */
if (mapping && mapping->ucm_context.ucm)
u->ucm_context = &mapping->ucm_context;
dev_id = pa_modargs_get_value(
ma, "device_id",
pa_modargs_get_value(ma, "device", DEFAULT_DEVICE));
u->paths_dir = pa_xstrdup(pa_modargs_get_value(ma, "paths_dir", NULL));
if (reserve_init(u, dev_id) < 0)
goto fail;
if (reserve_monitor_init(u, dev_id) < 0)
goto fail;
b = use_mmap;
d = use_tsched;
/* Force ALSA to reread its configuration if module-alsa-card didn't
* do it for us. This matters if our device was hot-plugged after ALSA
* has already read its configuration - see
* https://bugs.freedesktop.org/show_bug.cgi?id=54029
*/
if (!card)
snd_config_update_free_global();
if (mapping) {
if (!(dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
pa_log("device_id= not set");
goto fail;
}
if ((mod_name = pa_proplist_gets(mapping->proplist, PA_ALSA_PROP_UCM_MODIFIER))) {
if (snd_use_case_set(u->ucm_context->ucm->ucm_mgr, "_enamod", mod_name) < 0)
pa_log("Failed to enable ucm modifier %s", mod_name);
else
pa_log_debug("Enabled ucm modifier %s", mod_name);
}
if (!(u->pcm_handle = pa_alsa_open_by_device_id_mapping(
dev_id,
&u->device_name,
&ss, &map,
SND_PCM_STREAM_CAPTURE,
&period_frames, &buffer_frames, tsched_frames,
&b, &d, mapping)))
goto fail;
} else if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
if (!(profile_set = pa_alsa_profile_set_new(NULL, &map)))
goto fail;
if (!(u->pcm_handle = pa_alsa_open_by_device_id_auto(
dev_id,
&u->device_name,
&ss, &map,
SND_PCM_STREAM_CAPTURE,
&period_frames, &buffer_frames, tsched_frames,
&b, &d, profile_set, &mapping)))
goto fail;
} else {
if (!(u->pcm_handle = pa_alsa_open_by_device_string(
pa_modargs_get_value(ma, "device", DEFAULT_DEVICE),
&u->device_name,
&ss, &map,
SND_PCM_STREAM_CAPTURE,
&period_frames, &buffer_frames, tsched_frames,
&b, &d, false)))
goto fail;
}
pa_assert(u->device_name);
pa_log_info("Successfully opened device %s.", u->device_name);
if (pa_alsa_pcm_is_modem(u->pcm_handle)) {
pa_log_notice("Device %s is modem, refusing further initialization.", u->device_name);
goto fail;
}
if (mapping)
pa_log_info("Selected mapping '%s' (%s).", mapping->description, mapping->name);
if (use_mmap && !b) {
pa_log_info("Device doesn't support mmap(), falling back to UNIX read/write mode.");
u->use_mmap = use_mmap = false;
}
if (use_tsched && (!b || !d)) {
pa_log_info("Cannot enable timer-based scheduling, falling back to sound IRQ scheduling.");
u->use_tsched = use_tsched = false;
}
if (u->use_mmap)
pa_log_info("Successfully enabled mmap() mode.");
if (u->use_tsched) {
pa_log_info("Successfully enabled timer-based scheduling mode.");
if (u->fixed_latency_range)
pa_log_info("Disabling latency range changes on overrun");
}
u->verified_sample_spec = ss;
u->supported_formats = pa_alsa_get_supported_formats(u->pcm_handle, ss.format);
if (!u->supported_formats) {
pa_log_error("Failed to find any supported sample formats.");
goto fail;
}
u->supported_rates = pa_alsa_get_supported_rates(u->pcm_handle, ss.rate);
if (!u->supported_rates) {
pa_log_error("Failed to find any supported sample rates.");
goto fail;
}
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);
pa_source_new_data_init(&data);
data.driver = driver;
data.module = m;
data.card = card;
set_source_name(&data, ma, dev_id, u->device_name, mapping);
/* We need to give pa_modargs_get_value_boolean() a pointer to a local
* variable instead of using &data.namereg_fail directly, because
* data.namereg_fail is a bitfield and taking the address of a bitfield
* variable is impossible. */
namereg_fail = data.namereg_fail;
if (pa_modargs_get_value_boolean(ma, "namereg_fail", &namereg_fail) < 0) {
pa_log("Failed to parse namereg_fail argument.");
pa_source_new_data_done(&data);
goto fail;
}
data.namereg_fail = namereg_fail;
if (pa_modargs_get_value_boolean(ma, "avoid_resampling", &avoid_resampling) < 0) {
pa_log("Failed to parse avoid_resampling argument.");
pa_source_new_data_done(&data);
goto fail;
}
pa_source_new_data_set_avoid_resampling(&data, avoid_resampling);
pa_source_new_data_set_sample_spec(&data, &ss);
pa_source_new_data_set_channel_map(&data, &map);
pa_source_new_data_set_alternate_sample_rate(&data, alternate_sample_rate);
pa_alsa_init_proplist_pcm(m->core, data.proplist, u->pcm_handle);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_name);
pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_BUFFER_SIZE, "%lu", (unsigned long) (buffer_frames * frame_size));
pa_proplist_setf(data.proplist, PA_PROP_DEVICE_BUFFERING_FRAGMENT_SIZE, "%lu", (unsigned long) (period_frames * frame_size));
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_ACCESS_MODE, u->use_tsched ? "mmap+timer" : (u->use_mmap ? "mmap" : "serial"));
if (mapping) {
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_NAME, mapping->name);
pa_proplist_sets(data.proplist, PA_PROP_DEVICE_PROFILE_DESCRIPTION, mapping->description);
state = NULL;
while ((key = pa_proplist_iterate(mapping->proplist, &state)))
pa_proplist_sets(data.proplist, key, pa_proplist_gets(mapping->proplist, key));
}
pa_alsa_init_description(data.proplist, card);
if (u->control_device)
pa_alsa_init_proplist_ctl(data.proplist, u->control_device);
if (pa_modargs_get_proplist(ma, "source_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
pa_log("Invalid properties");
pa_source_new_data_done(&data);
goto fail;
}
if (u->ucm_context) {
pa_alsa_ucm_add_ports(&data.ports, data.proplist, u->ucm_context, false, card, u->pcm_handle, ignore_dB);
find_mixer(u, mapping, pa_modargs_get_value(ma, "control", NULL), ignore_dB);
} else {
find_mixer(u, mapping, pa_modargs_get_value(ma, "control", NULL), ignore_dB);
if (u->mixer_path_set)
pa_alsa_add_ports(&data, u->mixer_path_set, card);
}
u->source = pa_source_new(m->core, &data, PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY|(u->use_tsched ? PA_SOURCE_DYNAMIC_LATENCY : 0));
volume_is_set = data.volume_is_set;
mute_is_set = data.muted_is_set;
pa_source_new_data_done(&data);
if (!u->source) {
pa_log("Failed to create source object");
goto fail;
}
#ifdef USE_SMOOTHER_2
u->smoother = pa_smoother_2_new(SMOOTHER_WINDOW_USEC, pa_rtclock_now(), frame_size, u->source->sample_spec.rate);
#endif
if (u->ucm_context) {
pa_device_port *port;
unsigned h_prio = 0;
PA_HASHMAP_FOREACH(port, u->source->ports, state) {
if (!h_prio || port->priority > h_prio)
h_prio = port->priority;
}
/* ucm ports prioriy is 100, 200, ..., 900, change it to units digit */
h_prio = h_prio / 100;
u->source->priority += h_prio;
}
if (pa_modargs_get_value_u32(ma, "deferred_volume_safety_margin",
&u->source->thread_info.volume_change_safety_margin) < 0) {
pa_log("Failed to parse deferred_volume_safety_margin parameter");
goto fail;
}
if (pa_modargs_get_value_s32(ma, "deferred_volume_extra_delay",
&u->source->thread_info.volume_change_extra_delay) < 0) {
pa_log("Failed to parse deferred_volume_extra_delay parameter");
goto fail;
}
u->source->parent.process_msg = source_process_msg;
if (u->use_tsched)
u->source->update_requested_latency = source_update_requested_latency_cb;
u->source->set_state_in_main_thread = source_set_state_in_main_thread_cb;
u->source->set_state_in_io_thread = source_set_state_in_io_thread_cb;
if (u->ucm_context)
u->source->set_port = source_set_port_ucm_cb;
else
u->source->set_port = source_set_port_cb;
u->source->reconfigure = source_reconfigure_cb;
u->source->userdata = u;
pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
pa_source_set_rtpoll(u->source, u->rtpoll);
u->frame_size = frame_size;
u->frames_per_block = pa_mempool_block_size_max(m->core->mempool) / frame_size;
u->fragment_size = frag_size = (size_t) (period_frames * frame_size);
u->hwbuf_size = buffer_size = (size_t) (buffer_frames * frame_size);
pa_cvolume_mute(&u->hardware_volume, u->source->sample_spec.channels);
pa_log_info("Using %0.1f fragments of size %lu bytes (%0.2fms), buffer size is %lu bytes (%0.2fms)",
(double) u->hwbuf_size / (double) u->fragment_size,
(long unsigned) u->fragment_size,
(double) pa_bytes_to_usec(u->fragment_size, &ss) / PA_USEC_PER_MSEC,
(long unsigned) u->hwbuf_size,
(double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
if (u->use_tsched) {
u->tsched_watermark_ref = tsched_watermark;
reset_watermark(u, u->tsched_watermark_ref, &ss, false);
}
else
pa_source_set_fixed_latency(u->source, pa_bytes_to_usec(u->hwbuf_size, &ss));
reserve_update(u);
if (update_sw_params(u) < 0)
goto fail;
if (setup_mixer(u, ignore_dB) < 0)
goto fail;
pa_alsa_dump(PA_LOG_DEBUG, u->pcm_handle);
thread_name = pa_sprintf_malloc("alsa-source-%s", pa_strnull(pa_proplist_gets(u->source->proplist, "alsa.id")));
if (!(u->thread = pa_thread_new(thread_name, thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
pa_xfree(thread_name);
thread_name = NULL;
/* Get initial mixer settings */
if (volume_is_set) {
if (u->source->set_volume)
u->source->set_volume(u->source);
} else {
if (u->source->get_volume)
u->source->get_volume(u->source);
}
if (mute_is_set) {
if (u->source->set_mute)
u->source->set_mute(u->source);
} else {
if (u->source->get_mute) {
bool mute;
if (u->source->get_mute(u->source, &mute) >= 0)
pa_source_set_mute(u->source, mute, false);
}
}
if ((volume_is_set || mute_is_set) && u->source->write_volume)
u->source->write_volume(u->source);
pa_source_put(u->source);
if (profile_set)
pa_alsa_profile_set_free(profile_set);
return u->source;
fail:
pa_xfree(thread_name);
if (u)
userdata_free(u);
if (profile_set)
pa_alsa_profile_set_free(profile_set);
return NULL;
}
static void userdata_free(struct userdata *u) {
pa_assert(u);
if (u->source)
pa_source_unlink(u->source);
if (u->thread) {
pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
pa_thread_free(u->thread);
}
pa_thread_mq_done(&u->thread_mq);
if (u->source)
pa_source_unref(u->source);
if (u->mixer_pd)
pa_alsa_mixer_pdata_free(u->mixer_pd);
if (u->alsa_rtpoll_item)
pa_rtpoll_item_free(u->alsa_rtpoll_item);
if (u->rtpoll)
pa_rtpoll_free(u->rtpoll);
if (u->pcm_handle) {
snd_pcm_drop(u->pcm_handle);
snd_pcm_close(u->pcm_handle);
}
if (u->mixer_fdl)
pa_alsa_fdlist_free(u->mixer_fdl);
/* Only free the mixer_path if the sink owns it */
if (u->mixer_path && !u->mixer_path_set && !u->ucm_context)
pa_alsa_path_free(u->mixer_path);
if (u->mixers)
pa_hashmap_free(u->mixers);
if (u->smoother)
#ifdef USE_SMOOTHER_2
pa_smoother_2_free(u->smoother);
#else
pa_smoother_free(u->smoother);
#endif
if (u->supported_formats)
pa_xfree(u->supported_formats);
if (u->supported_rates)
pa_xfree(u->supported_rates);
reserve_done(u);
monitor_done(u);
pa_xfree(u->device_name);
pa_xfree(u->control_device);
pa_xfree(u->paths_dir);
pa_xfree(u);
}
void pa_alsa_source_free(pa_source *s) {
struct userdata *u;
pa_source_assert_ref(s);
pa_assert_se(u = s->userdata);
userdata_free(u);
}
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