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pulseaudio/src/modules/alsa/alsa-source.c
Tanu Kaskinen 7bc5cd7845 alsa: Fix log output to inform about positive base volumes correctly. 
Positive base volume can happen, if the alsa volume range has been limited. For
example, in an embedded environment it may be known that the sound device is
capable of louder output than what the speakers can handle, so setting the max
volume below 0 dB makes sense.
2010-05-10 14:07:12 +03:00

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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, 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 <stdio.h>
#include <asoundlib.h>
#include <pulse/i18n.h>
#include <pulse/rtclock.h>
#include <pulse/timeval.h>
#include <pulse/util.h>
#include <pulse/xmalloc.h>
#include <pulsecore/core-error.h>
#include <pulsecore/core.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/core-error.h>
#include <pulsecore/thread-mq.h>
#include <pulsecore/rtpoll.h>
#include <pulsecore/time-smoother.h>
#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 */
#define SMOOTHER_MIN_INTERVAL (2*PA_USEC_PER_MSEC) /* 2ms */
#define SMOOTHER_MAX_INTERVAL (200*PA_USEC_PER_MSEC) /* 200ms */
#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;
pa_alsa_fdlist *mixer_fdl;
snd_mixer_t *mixer_handle;
pa_alsa_path_set *mixer_path_set;
pa_alsa_path *mixer_path;
pa_cvolume hardware_volume;
size_t
frame_size,
fragment_size,
hwbuf_size,
tsched_watermark,
hwbuf_unused,
min_sleep,
min_wakeup,
watermark_inc_step,
watermark_dec_step,
watermark_inc_threshold,
watermark_dec_threshold;
pa_usec_t watermark_dec_not_before;
char *device_name;
char *control_device;
pa_bool_t use_mmap:1, use_tsched:1;
pa_rtpoll_item *alsa_rtpoll_item;
snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST];
pa_smoother *smoother;
uint64_t read_count;
pa_usec_t smoother_interval;
pa_usec_t last_smoother_update;
pa_reserve_wrapper *reserve;
pa_hook_slot *reserve_slot;
pa_reserve_monitor_wrapper *monitor;
pa_hook_slot *monitor_slot;
};
static void userdata_free(struct userdata *u);
static pa_hook_result_t reserve_cb(pa_reserve_wrapper *r, void *forced, struct userdata *u) {
pa_assert(r);
pa_assert(u);
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;
/* We are resuming, try to lock the device */
if (!(rname = pa_alsa_get_reserve_name(dname)))
return 0;
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_bool_t b;
pa_assert(w);
pa_assert(u);
b = PA_PTR_TO_UINT(busy) && !u->reserve;
pa_source_suspend(u->source, b, 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;
/* We are resuming, try to lock the device */
if (!(rname = pa_alsa_get_reserve_name(dname)))
return 0;
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;
}
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) pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec) / PA_USEC_PER_MSEC);
return;
}
/* Hmm, we cannot increase the watermark any further, hence let's raise the latency */
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 officialy 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) pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec) / PA_USEC_PER_MSEC);
/* We don't change the latency range*/
restart:
u->watermark_dec_not_before = now + TSCHED_WATERMARK_VERIFY_AFTER_USEC;
}
static pa_usec_t 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 = pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec);
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
return usec;
}
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", call, pa_alsa_strerror(err));
return -1;
}
snd_pcm_start(u->pcm_handle);
return 0;
}
static size_t check_left_to_record(struct userdata *u, size_t n_bytes, pa_bool_t on_timeout) {
size_t left_to_record;
size_t rec_space = u->hwbuf_size - u->hwbuf_unused;
pa_bool_t 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("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) {
pa_bool_t 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, pa_bool_t polled, pa_bool_t on_timeout) {
pa_bool_t work_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;
pa_bool_t after_avail = TRUE;
if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
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 (;;) {
int err;
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset, frames;
pa_memchunk chunk;
void *p;
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;
if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0)
continue;
return r;
}
/* Make sure that if these memblocks need to be copied they will fit into one slot */
if (frames > pa_mempool_block_size_max(u->source->core->mempool)/u->frame_size)
frames = pa_mempool_block_size_max(u->source->core->mempool)/u->frame_size;
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)) {
if ((r = try_recover(u, "snd_pcm_mmap_commit", (int) sframes)) == 0)
continue;
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);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*sleep_usec = 0;
}
return work_done ? 1 : 0;
}
static int unix_read(struct userdata *u, pa_usec_t *sleep_usec, pa_bool_t polled, pa_bool_t on_timeout) {
int work_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;
pa_bool_t after_avail = TRUE;
if (PA_UNLIKELY((n = pa_alsa_safe_avail(u->pcm_handle, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
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;
if ((r = try_recover(u, "snd_pcm_readi", (int) frames)) == 0)
continue;
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);
if (*sleep_usec > process_usec)
*sleep_usec -= process_usec;
else
*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, now2;
snd_pcm_status_t *status;
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, &delay, u->hwbuf_size, &u->source->sample_spec)) < 0)) {
pa_log_warn("Failed to get delay: %s", pa_alsa_strerror(err));
return;
}
if (PA_UNLIKELY((err = snd_pcm_status(u->pcm_handle, status)) < 0))
pa_log_warn("Failed to get timestamp: %s", pa_alsa_strerror(err));
else {
snd_htimestamp_t htstamp = { 0, 0 };
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();
/* 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;
position = u->read_count + ((uint64_t) delay * (uint64_t) u->frame_size);
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);
}
static pa_usec_t source_get_latency(struct userdata *u) {
int64_t delay;
pa_usec_t now1, now2;
pa_assert(u);
now1 = pa_rtclock_now();
now2 = pa_smoother_get(u->smoother, now1);
delay = (int64_t) now2 - (int64_t) pa_bytes_to_usec(u->read_count, &u->source->sample_spec);
return delay >= 0 ? (pa_usec_t) delay : 0;
}
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;
}
static int suspend(struct userdata *u) {
pa_assert(u);
pa_assert(u->pcm_handle);
pa_smoother_pause(u->smoother, pa_rtclock_now());
/* 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;
}
pa_log_info("Device suspended...");
return 0;
}
static int update_sw_params(struct userdata *u) {
snd_pcm_uframes_t avail_min;
int err;
pa_assert(u);
/* Use the full buffer if noone 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;
}
static int unsuspend(struct userdata *u) {
pa_sample_spec ss;
int err;
pa_bool_t b, d;
snd_pcm_uframes_t period_size, buffer_size;
pa_assert(u);
pa_assert(!u->pcm_handle);
pa_log_info("Trying resume...");
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) {
pa_log("Error opening PCM device %s: %s", u->device_name, pa_alsa_strerror(err));
goto fail;
}
ss = u->source->sample_spec;
period_size = u->fragment_size / u->frame_size;
buffer_size = 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_size, &buffer_size, 0, &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 (period_size*u->frame_size != u->fragment_size ||
buffer_size*u->frame_size != u->hwbuf_size) {
pa_log_warn("Resume failed, couldn't restore original fragment settings. (Old: %lu/%lu, New %lu/%lu)",
(unsigned long) u->hwbuf_size, (unsigned long) u->fragment_size,
(unsigned long) (buffer_size*u->frame_size), (unsigned long) (period_size*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 */
snd_pcm_start(u->pcm_handle);
u->read_count = 0;
pa_smoother_reset(u->smoother, pa_rtclock_now(), TRUE);
u->smoother_interval = SMOOTHER_MIN_INTERVAL;
u->last_smoother_update = 0;
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;
}
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: {
pa_usec_t r = 0;
if (u->pcm_handle)
r = source_get_latency(u);
*((pa_usec_t*) data) = r;
return 0;
}
case PA_SOURCE_MESSAGE_SET_STATE:
switch ((pa_source_state_t) PA_PTR_TO_UINT(data)) {
case PA_SOURCE_SUSPENDED: {
int r;
pa_assert(PA_SOURCE_IS_OPENED(u->source->thread_info.state));
if ((r = suspend(u)) < 0)
return r;
break;
}
case PA_SOURCE_IDLE:
case PA_SOURCE_RUNNING: {
int r;
if (u->source->thread_info.state == PA_SOURCE_INIT) {
if (build_pollfd(u) < 0)
return -PA_ERR_IO;
snd_pcm_start(u->pcm_handle);
}
if (u->source->thread_info.state == PA_SOURCE_SUSPENDED) {
if ((r = unsuspend(u)) < 0)
return r;
}
break;
}
case PA_SOURCE_UNLINKED:
case PA_SOURCE_INIT:
case PA_SOURCE_INVALID_STATE:
;
}
break;
}
return pa_source_process_msg(o, code, data, offset, chunk);
}
/* Called from main context */
static int source_set_state_cb(pa_source *s, pa_source_state_t new_state) {
pa_source_state_t old_state;
struct userdata *u;
pa_source_assert_ref(s);
pa_assert_se(u = s->userdata);
old_state = pa_source_get_state(u->source);
if (PA_SINK_IS_OPENED(old_state) && new_state == PA_SINK_SUSPENDED)
reserve_done(u);
else if (old_state == PA_SINK_SUSPENDED && PA_SINK_IS_OPENED(new_state))
if (reserve_init(u, u->device_name) < 0)
return -PA_ERR_BUSY;
return 0;
}
static int 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_get_volume(u->source, TRUE);
pa_source_get_mute(u->source, TRUE);
}
return 0;
}
static void source_get_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_cvolume r;
char t[PA_CVOLUME_SNPRINT_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(t, sizeof(t), &r));
if (pa_cvolume_equal(&u->hardware_volume, &r))
return;
s->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 t[PA_CVOLUME_SNPRINT_MAX];
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->volume, s->base_volume);
if (pa_alsa_path_set_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);
u->hardware_volume = r;
if (u->mixer_path->has_dB) {
pa_cvolume new_soft_volume;
pa_bool_t accurate_enough;
/* Match exactly what the user requested by software */
pa_sw_cvolume_divide(&new_soft_volume, &s->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(t, sizeof(t), &s->volume));
pa_log_debug("Got hardware volume: %s", pa_cvolume_snprint(t, sizeof(t), &u->hardware_volume));
pa_log_debug("Calculated software volume: %s (accurate-enough=%s)", pa_cvolume_snprint(t, sizeof(t), &new_soft_volume),
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(t, sizeof(t), &r));
/* We can't match exactly what the user requested, hence let's
* at least tell the user about it */
s->volume = r;
}
}
static void source_get_mute_cb(pa_source *s) {
struct userdata *u = s->userdata;
pa_bool_t b;
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, &b) < 0)
return;
s->muted = b;
}
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 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);
data = PA_DEVICE_PORT_DATA(p);
pa_assert_se(u->mixer_path = data->path);
pa_alsa_path_select(u->mixer_path, u->mixer_handle);
if (u->mixer_path->has_volume && u->mixer_path->has_dB) {
s->base_volume = pa_sw_volume_from_dB(-u->mixer_path->max_dB);
s->n_volume_steps = PA_VOLUME_NORM+1;
pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(s->base_volume));
} else {
s->base_volume = PA_VOLUME_NORM;
s->n_volume_steps = u->mixer_path->max_volume - u->mixer_path->min_volume + 1;
}
if (data->setting)
pa_alsa_setting_select(data->setting, u->mixer_handle);
if (s->set_mute)
s->set_mute(s);
if (s->set_volume)
s->set_volume(s);
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);
if (!u->pcm_handle)
return;
update_sw_params(u);
}
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_make_realtime(u->core->realtime_priority);
pa_thread_mq_install(&u->thread_mq);
for (;;) {
int ret;
#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;
pa_bool_t on_timeout = pa_rtpoll_timer_elapsed(u->rtpoll);
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 */
cusec = pa_smoother_translate(u->smoother, pa_rtclock_now(), sleep_usec);
/* 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 */
pa_rtpoll_set_timer_relative(u->rtpoll, PA_MIN(sleep_usec, cusec));
}
} else if (u->use_tsched)
/* OK, we're in an invalid state, let's disable our timers */
pa_rtpoll_set_timer_disabled(u->rtpoll);
/* Hmm, nothing to do. Let's sleep */
if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0)
goto fail;
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 (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0)
goto fail;
snd_pcm_start(u->pcm_handle);
} else if (revents && u->use_tsched && pa_log_ratelimit())
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, pa_bool_t ignore_dB) {
if (!mapping && !element)
return;
if (!(u->mixer_handle = pa_alsa_open_mixer_for_pcm(u->pcm_handle, &u->control_device))) {
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, 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 {
if (!(u->mixer_path_set = pa_alsa_path_set_new(mapping, PA_ALSA_DIRECTION_INPUT)))
goto fail;
pa_alsa_path_set_probe(u->mixer_path_set, u->mixer_handle, ignore_dB);
pa_log_debug("Probed mixer paths:");
pa_alsa_path_set_dump(u->mixer_path_set);
}
return;
fail:
if (u->mixer_path_set) {
pa_alsa_path_set_free(u->mixer_path_set);
u->mixer_path_set = NULL;
} else if (u->mixer_path) {
pa_alsa_path_free(u->mixer_path);
u->mixer_path = NULL;
}
if (u->mixer_handle) {
snd_mixer_close(u->mixer_handle);
u->mixer_handle = NULL;
}
}
static int setup_mixer(struct userdata *u, pa_bool_t ignore_dB) {
pa_assert(u);
if (!u->mixer_handle)
return 0;
if (u->source->active_port) {
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, u->mixer_handle);
if (data->setting)
pa_alsa_setting_select(data->setting, u->mixer_handle);
} else {
if (!u->mixer_path && u->mixer_path_set)
u->mixer_path = 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_handle);
if (u->mixer_path->settings)
pa_alsa_setting_select(u->mixer_path->settings, u->mixer_handle);
} else
return 0;
}
if (!u->mixer_path->has_volume)
pa_log_info("Driver does not support hardware volume control, falling back to software volume control.");
else {
if (u->mixer_path->has_dB) {
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;
if (u->mixer_path->max_dB > 0.0)
pa_log_info("Fixing base volume to %0.2f dB", pa_sw_volume_to_dB(u->source->base_volume));
else
pa_log_info("No particular base volume set, fixing to 0 dB");
} else {
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;
}
u->source->get_volume = source_get_volume_cb;
u->source->set_volume = source_set_volume_cb;
u->source->flags |= PA_SOURCE_HW_VOLUME_CTRL | (u->mixer_path->has_dB ? PA_SOURCE_DECIBEL_VOLUME : 0);
pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->mixer_path->has_dB ? "supported" : "not supported");
}
if (!u->mixer_path->has_mute) {
pa_log_info("Driver does not support hardware mute control, falling back to software mute control.");
} else {
u->source->get_mute = source_get_mute_cb;
u->source->set_mute = source_set_mute_cb;
u->source->flags |= PA_SOURCE_HW_MUTE_CTRL;
pa_log_info("Using hardware mute control.");
}
u->mixer_fdl = pa_alsa_fdlist_new();
if (pa_alsa_fdlist_set_mixer(u->mixer_fdl, u->mixer_handle, 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;
pa_sample_spec ss, requested_ss;
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;
pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, ignore_dB = FALSE;
pa_source_new_data data;
pa_alsa_profile_set *profile_set = NULL;
pa_assert(m);
pa_assert(ma);
ss = m->core->default_sample_spec;
map = m->core->default_channel_map;
if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
pa_log("Failed to parse sample specification");
goto fail;
}
requested_ss = ss;
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 timer_scheduling 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;
}
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->rtpoll = pa_rtpoll_new();
pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
u->smoother = pa_smoother_new(
DEFAULT_TSCHED_WATERMARK_USEC*2,
DEFAULT_TSCHED_WATERMARK_USEC*2,
TRUE,
TRUE,
5,
pa_rtclock_now(),
FALSE);
u->smoother_interval = SMOOTHER_MIN_INTERVAL;
dev_id = pa_modargs_get_value(
ma, "device_id",
pa_modargs_get_value(ma, "device", DEFAULT_DEVICE));
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;
if (mapping) {
if (!(dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
pa_log("device_id= not set");
goto fail;
}
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.");
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);
find_mixer(u, mapping, pa_modargs_get_value(ma, "control", NULL), ignore_dB);
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);
pa_source_new_data_set_sample_spec(&data, &ss);
pa_source_new_data_set_channel_map(&data, &map);
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);
}
pa_alsa_init_description(data.proplist);
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->mixer_path_set)
pa_alsa_add_ports(&data.ports, u->mixer_path_set);
u->source = pa_source_new(m->core, &data, PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY|(u->use_tsched ? PA_SOURCE_DYNAMIC_LATENCY : 0));
pa_source_new_data_done(&data);
if (!u->source) {
pa_log("Failed to create source object");
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 = source_set_state_cb;
u->source->set_port = source_set_port_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->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 = pa_usec_to_bytes_round_up(pa_bytes_to_usec_round_up(tsched_watermark, &requested_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);
pa_source_set_latency_range(u->source,
0,
pa_bytes_to_usec(u->hwbuf_size, &ss));
pa_log_info("Time scheduling watermark is %0.2fms",
(double) pa_bytes_to_usec(u->tsched_watermark, &ss) / PA_USEC_PER_MSEC);
} 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);
if (!(u->thread = pa_thread_new("alsa-source", thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
/* Get initial mixer settings */
if (data.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 (data.muted_is_set) {
if (u->source->set_mute)
u->source->set_mute(u->source);
} else {
if (u->source->get_mute)
u->source->get_mute(u->source);
}
pa_source_put(u->source);
if (profile_set)
pa_alsa_profile_set_free(profile_set);
return u->source;
fail:
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->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);
if (u->mixer_path_set)
pa_alsa_path_set_free(u->mixer_path_set);
else if (u->mixer_path)
pa_alsa_path_free(u->mixer_path);
if (u->mixer_handle)
snd_mixer_close(u->mixer_handle);
if (u->smoother)
pa_smoother_free(u->smoother);
reserve_done(u);
monitor_done(u);
pa_xfree(u->device_name);
pa_xfree(u->control_device);
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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