#include <pulse/xmalloc.h>
#include <pulse/util.h>
+#include <pulse/timeval.h>
#include <pulsecore/core-error.h>
#include <pulsecore/core.h>
#include <pulsecore/core-error.h>
#include <pulsecore/thread-mq.h>
#include <pulsecore/rtpoll.h>
+#include <pulsecore/time-smoother.h>
+#include <pulsecore/rtclock.h>
#include "alsa-util.h"
#include "module-alsa-source-symdef.h"
-PA_MODULE_AUTHOR("Lennart Poettering")
-PA_MODULE_DESCRIPTION("ALSA Source")
-PA_MODULE_VERSION(PACKAGE_VERSION)
+PA_MODULE_AUTHOR("Lennart Poettering");
+PA_MODULE_DESCRIPTION("ALSA Source");
+PA_MODULE_VERSION(PACKAGE_VERSION);
+PA_MODULE_LOAD_ONCE(FALSE);
PA_MODULE_USAGE(
"source_name=<name for the source> "
"device=<ALSA device> "
+ "device_id=<ALSA card index> "
"format=<sample format> "
- "channels=<number of channels> "
"rate=<sample rate> "
+ "channels=<number of channels> "
+ "channel_map=<channel map> "
"fragments=<number of fragments> "
"fragment_size=<fragment size> "
- "channel_map=<channel map> "
- "mmap=<enable memory mapping?>")
+ "mmap=<enable memory mapping?> "
+ "tsched=<enable system timer based scheduling mode?> "
+ "tsched_buffer_size=<buffer size when using timer based scheduling> "
+ "tsched_buffer_watermark=<upper fill watermark> "
+ "mixer_reset=<reset hw volume and mute settings to sane defaults when falling back to software?>");
+
+static const char* const valid_modargs[] = {
+ "source_name",
+ "device",
+ "device_id",
+ "format",
+ "rate",
+ "channels",
+ "channel_map",
+ "fragments",
+ "fragment_size",
+ "mmap",
+ "tsched",
+ "tsched_buffer_size",
+ "tsched_buffer_watermark",
+ "mixer_reset",
+ NULL
+};
#define DEFAULT_DEVICE "default"
+#define DEFAULT_TSCHED_BUFFER_USEC (5*PA_USEC_PER_SEC)
+#define DEFAULT_TSCHED_WATERMARK_USEC (20*PA_USEC_PER_MSEC)
+#define TSCHED_MIN_SLEEP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
+#define TSCHED_MIN_WAKEUP_USEC (3*PA_USEC_PER_MSEC) /* 3ms */
struct userdata {
pa_core *core;
snd_mixer_t *mixer_handle;
snd_mixer_elem_t *mixer_elem;
long hw_volume_max, hw_volume_min;
+ long hw_dB_max, hw_dB_min;
+ pa_bool_t hw_dB_supported;
- size_t frame_size, fragment_size, hwbuf_size;
+ size_t frame_size, fragment_size, hwbuf_size, tsched_watermark;
unsigned nfragments;
char *device_name;
- int use_mmap;
+ pa_bool_t use_mmap, use_tsched;
pa_rtpoll_item *alsa_rtpoll_item;
-};
-static const char* const valid_modargs[] = {
- "device",
- "source_name",
- "channels",
- "rate",
- "format",
- "fragments",
- "fragment_size",
- "channel_map",
- "mmap",
- NULL
+ snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST];
+
+ pa_smoother *smoother;
+ int64_t frame_index;
+
+ snd_pcm_sframes_t hwbuf_unused_frames;
};
+static void fix_tsched_watermark(struct userdata *u) {
+ size_t max_use;
+ size_t min_sleep, min_wakeup;
+ pa_assert(u);
+
+ max_use = u->hwbuf_size - u->hwbuf_unused_frames * u->frame_size;
+
+ min_sleep = pa_usec_to_bytes(TSCHED_MIN_SLEEP_USEC, &u->source->sample_spec);
+ min_wakeup = pa_usec_to_bytes(TSCHED_MIN_WAKEUP_USEC, &u->source->sample_spec);
+
+ if (min_sleep > max_use/2)
+ min_sleep = pa_frame_align(max_use/2, &u->source->sample_spec);
+ if (min_sleep < u->frame_size)
+ min_sleep = u->frame_size;
+
+ if (min_wakeup > max_use/2)
+ min_wakeup = pa_frame_align(max_use/2, &u->source->sample_spec);
+ if (min_wakeup < u->frame_size)
+ min_wakeup = u->frame_size;
+
+ if (u->tsched_watermark > max_use-min_sleep)
+ u->tsched_watermark = max_use-min_sleep;
+
+ if (u->tsched_watermark < min_wakeup)
+ u->tsched_watermark = min_wakeup;
+}
+
+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, snd_strerror(err));
+
+ if (err == -EAGAIN) {
+ pa_log_debug("%s: EAGAIN", call);
+ return 1;
+ }
+
+ if (err == -EPIPE)
+ pa_log_debug("%s: Buffer overrun!", call);
+
+ if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0) {
+ snd_pcm_start(u->pcm_handle);
+ return 0;
+ }
+
+ pa_log("%s: %s", call, snd_strerror(err));
+ return -1;
+}
+
+static void check_left_to_record(struct userdata *u, snd_pcm_sframes_t n) {
+ size_t left_to_record;
+
+ if (n*u->frame_size < u->hwbuf_size)
+ left_to_record = u->hwbuf_size - (n*u->frame_size);
+ else
+ left_to_record = 0;
+
+ if (left_to_record > 0)
+ 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);
+ else {
+ pa_log_info("Overrun!");
+
+ if (u->use_tsched) {
+ size_t old_watermark = u->tsched_watermark;
+
+ u->tsched_watermark *= 2;
+ fix_tsched_watermark(u);
+
+ if (old_watermark != u->tsched_watermark)
+ pa_log_notice("Increasing wakeup watermark to %0.2f ms",
+ (double) pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec) / PA_USEC_PER_MSEC);
+ }
+ }
+}
+
static int mmap_read(struct userdata *u) {
int work_done = 0;
+ pa_bool_t checked_left_to_record = FALSE;
pa_assert(u);
pa_source_assert_ref(u->source);
for (;;) {
snd_pcm_sframes_t n;
- int err;
+ int err, r;
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset, frames;
pa_memchunk chunk;
void *p;
- if ((n = snd_pcm_avail_update(u->pcm_handle)) < 0) {
+ snd_pcm_hwsync(u->pcm_handle);
- if (n == -EPIPE)
- pa_log_debug("snd_pcm_avail_update: Buffer underrun!");
+ if (PA_UNLIKELY((n = snd_pcm_avail_update(u->pcm_handle)) < 0)) {
- if ((err = snd_pcm_recover(u->pcm_handle, n, 1)) == 0)
+ if ((r = try_recover(u, "snd_pcm_avail_update", err)) == 0)
continue;
-
- if (err == -EAGAIN)
+ else if (r > 0)
return work_done;
- pa_log("snd_pcm_avail_update: %s", snd_strerror(err));
- return -1;
+ return r;
}
-/* pa_log("Got request for %i samples", (int) n); */
+ if (checked_left_to_record) {
+ check_left_to_record(u, n);
+ checked_left_to_record = TRUE;
+ }
- if (n <= 0)
+ if (PA_UNLIKELY(n <= 0))
return work_done;
frames = n;
- if ((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 0) {
+ pa_log_debug("%lu frames to read", (unsigned long) frames);
- if (err == -EPIPE)
- pa_log_debug("snd_pcm_mmap_begin: Buffer underrun!");
+ if (PA_UNLIKELY((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 0)) {
- if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0)
+ if ((r = try_recover(u, "snd_pcm_mmap_begin", err)) == 0)
continue;
-
- if (err == -EAGAIN)
+ else if (r > 0)
return work_done;
- pa_log("Failed to write data to DSP: %s", snd_strerror(err));
- return -1;
+ 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;
+
/* Check these are multiples of 8 bit */
pa_assert((areas[0].first & 7) == 0);
pa_assert((areas[0].step & 7)== 0);
p = (uint8_t*) areas[0].addr + (offset * u->frame_size);
- chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, 1);
+ 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);
-
- /* FIXME: Maybe we can do something to keep this memory block
- * a little bit longer around? */
pa_memblock_unref_fixed(chunk.memblock);
- if ((err = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0) {
-
- if (err == -EPIPE)
- pa_log_debug("snd_pcm_mmap_commit: Buffer underrun!");
+ if (PA_UNLIKELY((err = snd_pcm_mmap_commit(u->pcm_handle, offset, frames)) < 0)) {
- if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0)
+ if ((r = try_recover(u, "snd_pcm_mmap_commit", err)) == 0)
continue;
-
- if (err == -EAGAIN)
+ else if (r > 0)
return work_done;
- pa_log("Failed to write data to DSP: %s", snd_strerror(err));
- return -1;
+ return r;
}
work_done = 1;
-/* pa_log("wrote %i samples", (int) frames); */
+ u->frame_index += frames;
+
+ pa_log_debug("read %lu frames", (unsigned long) frames);
+
+ if (PA_LIKELY(frames >= (snd_pcm_uframes_t) n))
+ return work_done;
}
}
static int unix_read(struct userdata *u) {
- snd_pcm_status_t *status;
int work_done = 0;
-
- snd_pcm_status_alloca(&status);
+ pa_bool_t checked_left_to_record = FALSE;
pa_assert(u);
pa_source_assert_ref(u->source);
for (;;) {
void *p;
- snd_pcm_sframes_t t, k;
- ssize_t l;
- int err;
+ snd_pcm_sframes_t n, frames;
+ int r;
pa_memchunk chunk;
- if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) {
- pa_log("Failed to query DSP status data: %s", snd_strerror(err));
- return -1;
- }
+ snd_pcm_hwsync(u->pcm_handle);
+
+ if (PA_UNLIKELY((n = snd_pcm_avail_update(u->pcm_handle)) < 0)) {
- if (snd_pcm_status_get_avail_max(status)*u->frame_size >= u->hwbuf_size)
- pa_log_debug("Buffer overrun!");
+ if ((r = try_recover(u, "snd_pcm_avail_update", n)) == 0)
+ continue;
+ else if (r > 0)
+ return work_done;
+
+ return r;
+ }
- l = snd_pcm_status_get_avail(status) * u->frame_size;
+ if (checked_left_to_record) {
+ check_left_to_record(u, n);
+ checked_left_to_record = TRUE;
+ }
- if (l <= 0)
+ if (PA_UNLIKELY(n <= 0))
return work_done;
chunk.memblock = pa_memblock_new(u->core->mempool, (size_t) -1);
- k = pa_memblock_get_length(chunk.memblock);
+ frames = pa_memblock_get_length(chunk.memblock) / u->frame_size;
- if (k > l)
- k = l;
+ if (frames > n)
+ frames = n;
- k = (k/u->frame_size)*u->frame_size;
+ pa_log_debug("%lu frames to read", (unsigned long) n);
p = pa_memblock_acquire(chunk.memblock);
- t = snd_pcm_readi(u->pcm_handle, (uint8_t*) p, k / u->frame_size);
+ frames = snd_pcm_readi(u->pcm_handle, (uint8_t*) p, frames);
pa_memblock_release(chunk.memblock);
-/* pa_log("wrote %i bytes of %u (%u)", t*u->frame_size, u->memchunk.length, l); */
-
- pa_assert(t != 0);
+ pa_assert(frames != 0);
- if (t < 0) {
+ if (PA_UNLIKELY(frames < 0)) {
pa_memblock_unref(chunk.memblock);
- if ((t = snd_pcm_recover(u->pcm_handle, t, 1)) == 0)
+ if ((r = try_recover(u, "snd_pcm_readi", n)) == 0)
continue;
-
- if (t == -EAGAIN) {
- pa_log_debug("EAGAIN");
+ else if (r > 0)
return work_done;
- } else {
- pa_log("Failed to read data from DSP: %s", snd_strerror(t));
- return -1;
- }
+
+ return r;
}
chunk.index = 0;
- chunk.length = t * u->frame_size;
+ chunk.length = frames * u->frame_size;
pa_source_post(u->source, &chunk);
pa_memblock_unref(chunk.memblock);
work_done = 1;
- if (t * u->frame_size >= (unsigned) l)
+ u->frame_index += frames;
+
+ pa_log_debug("read %lu frames", (unsigned long) frames);
+
+ if (PA_LIKELY(frames >= n))
return work_done;
}
}
-static pa_usec_t source_get_latency(struct userdata *u) {
- pa_usec_t r = 0;
- snd_pcm_status_t *status;
- snd_pcm_sframes_t frames = 0;
+static void update_smoother(struct userdata *u) {
+ snd_pcm_sframes_t delay = 0;
+ int64_t frames;
int err;
-
- snd_pcm_status_alloca(&status);
+ pa_usec_t now1, now2;
pa_assert(u);
pa_assert(u->pcm_handle);
- if ((err = snd_pcm_status(u->pcm_handle, status)) < 0)
- pa_log("Failed to get delay: %s", snd_strerror(err));
- else
- frames = snd_pcm_status_get_delay(status);
+ /* Let's update the time smoother */
+
+ snd_pcm_hwsync(u->pcm_handle);
+ snd_pcm_avail_update(u->pcm_handle);
+
+ if (PA_UNLIKELY((err = snd_pcm_delay(u->pcm_handle, &delay)) < 0)) {
+ pa_log_warn("Failed to get delay: %s", snd_strerror(err));
+ return;
+ }
+
+ frames = u->frame_index + delay;
+
+ now1 = pa_rtclock_usec();
+ now2 = pa_bytes_to_usec(frames * u->frame_size, &u->source->sample_spec);
+
+ pa_smoother_put(u->smoother, now1, now2);
+}
+
+static pa_usec_t source_get_latency(struct userdata *u) {
+ pa_usec_t r = 0;
+ int64_t delay;
+ pa_usec_t now1, now2;
+
+ pa_assert(u);
+
+ now1 = pa_rtclock_usec();
+ now2 = pa_smoother_get(u->smoother, now1);
+
+ delay = (int64_t) now2 - pa_bytes_to_usec(u->frame_index * u->frame_size, &u->source->sample_spec);
- if (frames > 0)
- r = pa_bytes_to_usec(frames * u->frame_size, &u->source->sample_spec);
+ if (delay > 0)
+ r = (pa_usec_t) delay;
return r;
}
static int build_pollfd(struct userdata *u) {
- int err;
- struct pollfd *pollfd;
- int n;
-
pa_assert(u);
pa_assert(u->pcm_handle);
- if ((n = snd_pcm_poll_descriptors_count(u->pcm_handle)) < 0) {
- pa_log("snd_pcm_poll_descriptors_count() failed: %s", snd_strerror(n));
- return -1;
- }
-
if (u->alsa_rtpoll_item)
pa_rtpoll_item_free(u->alsa_rtpoll_item);
- u->alsa_rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, n);
- pollfd = pa_rtpoll_item_get_pollfd(u->alsa_rtpoll_item, NULL);
-
- if ((err = snd_pcm_poll_descriptors(u->pcm_handle, pollfd, n)) < 0) {
- pa_log("snd_pcm_poll_descriptors() failed: %s", snd_strerror(err));
+ if (!(u->alsa_rtpoll_item = pa_alsa_build_pollfd(u->pcm_handle, u->rtpoll)))
return -1;
- }
return 0;
}
pa_assert(u);
pa_assert(u->pcm_handle);
+ pa_smoother_pause(u->smoother, pa_rtclock_usec());
+
/* Let's suspend */
snd_pcm_close(u->pcm_handle);
u->pcm_handle = NULL;
return 0;
}
+static pa_usec_t hw_sleep_time(struct userdata *u) {
+ pa_usec_t wm, usec;
+
+ pa_assert(u);
+
+ 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);
+
+/* pa_log_debug("hw buffer time: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */
+
+ wm = pa_bytes_to_usec(u->tsched_watermark, &u->source->sample_spec);
+
+ if (usec >= wm)
+ usec -= wm;
+ else
+ usec /= 2;
+
+/* pa_log_debug("after watermark: %u ms", (unsigned) (usec / PA_USEC_PER_MSEC)); */
+
+ return usec;
+}
+
+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_frames = 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 %0.2f", (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_frames =
+ PA_LIKELY(b < u->hwbuf_size) ?
+ ((u->hwbuf_size - b) / u->frame_size) : 0;
+
+ fix_tsched_watermark(u);
+ }
+ }
+
+ pa_log_debug("hwbuf_unused_frames=%lu", (unsigned long) u->hwbuf_unused_frames);
+
+ avail_min = 1;
+
+ if (u->use_tsched) {
+ pa_usec_t usec;
+
+ usec = hw_sleep_time(u);
+ avail_min += pa_usec_to_bytes(usec, &u->source->sample_spec);
+ }
+
+ pa_log_debug("setting avail_min=%lu", (unsigned long) avail_min);
+
+ if ((err = pa_alsa_set_sw_params(u->pcm_handle, avail_min)) < 0) {
+ pa_log("Failed to set software parameters: %s", snd_strerror(err));
+ return err;
+ }
+
+ return 0;
+}
+
static int unsuspend(struct userdata *u) {
pa_sample_spec ss;
- int err, b;
+ int err;
+ pa_bool_t b, d;
unsigned nfrags;
snd_pcm_uframes_t period_size;
nfrags = u->nfragments;
period_size = u->fragment_size / u->frame_size;
b = u->use_mmap;
+ d = u->use_tsched;
- if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, &b)) < 0) {
+ if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, u->hwbuf_size / u->frame_size, &b, &d, TRUE)) < 0) {
pa_log("Failed to set hardware parameters: %s", snd_strerror(err));
goto fail;
}
- if (b != u->use_mmap) {
+ if (b != u->use_mmap || d != u->use_tsched) {
pa_log_warn("Resume failed, couldn't get original access mode.");
goto fail;
}
goto fail;
}
- if ((err = pa_alsa_set_sw_params(u->pcm_handle)) < 0) {
- pa_log("Failed to set software parameters: %s", snd_strerror(err));
+ if (update_sw_params(u) < 0)
goto fail;
- }
if (build_pollfd(u) < 0)
goto fail;
- snd_pcm_start(u->pcm_handle);
-
/* FIXME: We need to reload the volume somehow */
+ snd_pcm_start(u->pcm_handle);
+ pa_smoother_resume(u->smoother, pa_rtclock_usec());
+
pa_log_info("Resumed successfully...");
return 0;
switch ((pa_source_state_t) PA_PTR_TO_UINT(data)) {
case PA_SOURCE_SUSPENDED:
- pa_assert(PA_SOURCE_OPENED(u->source->thread_info.state));
+ pa_assert(PA_SOURCE_IS_OPENED(u->source->thread_info.state));
if (suspend(u) < 0)
return -1;
pa_assert(u->mixer_elem);
for (i = 0; i < s->sample_spec.channels; i++) {
- long set_vol, vol;
+ long alsa_vol;
- pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+ pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, u->mixer_map[i]));
- if ((err = snd_mixer_selem_get_capture_volume(u->mixer_elem, i, &vol)) < 0)
- goto fail;
+ if (u->hw_dB_supported) {
- set_vol = (long) roundf(((float) s->volume.values[i] * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min;
+ if ((err = snd_mixer_selem_get_capture_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol)) >= 0) {
+ s->volume.values[i] = pa_sw_volume_from_dB(alsa_vol / 100.0);
+ continue;
+ }
+
+ u->hw_dB_supported = FALSE;
+ }
+
+ if ((err = snd_mixer_selem_get_capture_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol)) < 0)
+ goto fail;
- /* Try to avoid superfluous volume changes */
- if (set_vol != vol)
- s->volume.values[i] = (pa_volume_t) roundf(((float) (vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min));
+ s->volume.values[i] = (pa_volume_t) roundf(((float) (alsa_vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min));
}
return 0;
fail:
pa_log_error("Unable to read volume: %s", snd_strerror(err));
- s->get_volume = NULL;
- s->set_volume = NULL;
return -1;
}
long alsa_vol;
pa_volume_t vol;
- pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+ pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, u->mixer_map[i]));
- vol = s->volume.values[i];
+ vol = PA_MIN(s->volume.values[i], PA_VOLUME_NORM);
- if (vol > PA_VOLUME_NORM)
- vol = PA_VOLUME_NORM;
+ if (u->hw_dB_supported) {
+ alsa_vol = (long) (pa_sw_volume_to_dB(vol) * 100);
+ alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_dB_min, u->hw_dB_max);
+
+
+ if ((err = snd_mixer_selem_set_capture_dB(u->mixer_elem, u->mixer_map[i], alsa_vol, -1)) >= 0) {
+
+ if (snd_mixer_selem_get_capture_dB(u->mixer_elem, u->mixer_map[i], &alsa_vol) >= 0)
+ s->volume.values[i] = pa_sw_volume_from_dB(alsa_vol / 100.0);
+
+ continue;
+ }
+
+ u->hw_dB_supported = FALSE;
+ }
alsa_vol = (long) roundf(((float) vol * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min;
+ alsa_vol = PA_CLAMP_UNLIKELY(alsa_vol, u->hw_volume_min, u->hw_volume_max);
- if ((err = snd_mixer_selem_set_capture_volume(u->mixer_elem, i, alsa_vol)) < 0)
+ if ((err = snd_mixer_selem_set_capture_volume(u->mixer_elem, u->mixer_map[i], alsa_vol)) < 0)
goto fail;
+
+ if (snd_mixer_selem_get_capture_volume(u->mixer_elem, u->mixer_map[i], &alsa_vol) >= 0)
+ s->volume.values[i] = (pa_volume_t) roundf(((float) (alsa_vol - u->hw_volume_min) * PA_VOLUME_NORM) / (u->hw_volume_max - u->hw_volume_min));
}
return 0;
fail:
pa_log_error("Unable to set volume: %s", snd_strerror(err));
- s->get_volume = NULL;
- s->set_volume = NULL;
return -1;
}
if ((err = snd_mixer_selem_get_capture_switch(u->mixer_elem, 0, &sw)) < 0) {
pa_log_error("Unable to get switch: %s", snd_strerror(err));
-
- s->get_mute = NULL;
- s->set_mute = NULL;
return -1;
}
if ((err = snd_mixer_selem_set_capture_switch_all(u->mixer_elem, !s->muted)) < 0) {
pa_log_error("Unable to set switch: %s", snd_strerror(err));
-
- s->get_mute = NULL;
- s->set_mute = NULL;
return -1;
}
return 0;
}
+static void source_update_requested_latency_cb(pa_source *s) {
+ struct userdata *u = s->userdata;
+
+ pa_assert(u);
+
+ update_sw_params(u);
+}
+
static void thread_func(void *userdata) {
struct userdata *u = userdata;
for (;;) {
int ret;
+ pa_log_debug("loop");
+
/* Read some data and pass it to the sources */
- if (PA_SOURCE_OPENED(u->source->thread_info.state)) {
+ if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) {
+ int work_done = 0;
- if (u->use_mmap) {
- if (mmap_read(u) < 0)
- goto fail;
+ if (u->use_mmap)
+ work_done = mmap_read(u);
+ else
+ work_done = unix_read(u);
- } else {
- if (unix_read(u) < 0)
- goto fail;
+ 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 usec, cusec;
+
+ /* OK, the capture buffer is now empty, let's
+ * calculate when to wake up next */
+
+ usec = hw_sleep_time(u);
+
+ pa_log_debug("Waking up in %0.2fms (sound card clock).", (double) 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_usec(), 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(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, 1)) < 0)
goto finish;
/* Tell ALSA about this and process its response */
- if (PA_SOURCE_OPENED(u->source->thread_info.state)) {
+ if (PA_SOURCE_IS_OPENED(u->source->thread_info.state)) {
struct pollfd *pollfd;
unsigned short revents = 0;
int err;
}
if (revents & (POLLERR|POLLNVAL|POLLHUP)) {
+ if (pa_alsa_recover_from_poll(u->pcm_handle, revents) < 0)
+ goto fail;
- if (revents & POLLERR)
- pa_log_warn("Got POLLERR from ALSA");
- if (revents & POLLNVAL)
- pa_log_warn("Got POLLNVAL from ALSA");
- if (revents & POLLHUP)
- pa_log_warn("Got POLLHUP from ALSA");
-
- /* Try to recover from this error */
-
- switch (snd_pcm_state(u->pcm_handle)) {
-
- case SND_PCM_STATE_XRUN:
- if ((err = snd_pcm_recover(u->pcm_handle, -EPIPE, 1)) != 0) {
- pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and XRUN: %s", snd_strerror(err));
- goto fail;
- }
- break;
-
- case SND_PCM_STATE_SUSPENDED:
- if ((err = snd_pcm_recover(u->pcm_handle, -ESTRPIPE, 1)) != 0) {
- pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP and SUSPENDED: %s", snd_strerror(err));
- goto fail;
- }
- break;
-
- default:
-
- snd_pcm_drop(u->pcm_handle);
-
- if ((err = snd_pcm_prepare(u->pcm_handle)) < 0) {
- pa_log_warn("Could not recover from POLLERR|POLLNVAL|POLLHUP with snd_pcm_prepare(): %s", snd_strerror(err));
- goto fail;
- }
- break;
- }
+ snd_pcm_start(u->pcm_handle);
}
+
+ if (revents)
+ pa_log_debug("Wakeup from ALSA! (%i)", revents);
}
}
pa_modargs *ma = NULL;
struct userdata *u = NULL;
- char *dev;
+ const char *dev_id;
pa_sample_spec ss;
pa_channel_map map;
- unsigned nfrags, frag_size;
- snd_pcm_uframes_t period_size;
+ uint32_t nfrags, hwbuf_size, frag_size, tsched_size, tsched_watermark;
+ snd_pcm_uframes_t period_frames, tsched_frames;
size_t frame_size;
snd_pcm_info_t *pcm_info = NULL;
int err;
- char *t;
const char *name;
char *name_buf = NULL;
- int namereg_fail;
- int use_mmap = 1, b;
+ pa_bool_t namereg_fail;
+ pa_bool_t use_mmap = TRUE, b, use_tsched = TRUE, d, mixer_reset = TRUE;
+ pa_source_new_data data;
snd_pcm_info_alloca(&pcm_info);
pa_assert(m);
+ pa_alsa_redirect_errors_inc();
+
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log("Failed to parse module arguments");
goto fail;
frame_size = pa_frame_size(&ss);
nfrags = m->core->default_n_fragments;
- frag_size = pa_usec_to_bytes(m->core->default_fragment_size_msec*1000, &ss);
+ frag_size = pa_usec_to_bytes(m->core->default_fragment_size_msec*PA_USEC_PER_MSEC, &ss);
if (frag_size <= 0)
frag_size = frame_size;
+ tsched_size = pa_usec_to_bytes(DEFAULT_TSCHED_BUFFER_USEC, &ss);
+ tsched_watermark = 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) {
+ 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;
}
- period_size = frag_size/frame_size;
+
+ hwbuf_size = frag_size * nfrags;
+ period_frames = frag_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 (use_tsched && !pa_rtclock_hrtimer()) {
+ pa_log("Disabling timer-based scheduling because high-resolution timers are not available from the kernel.");
+ use_tsched = FALSE;
+ }
+
+ if (pa_modargs_get_value_boolean(ma, "mixer_reset", &mixer_reset) < 0) {
+ pa_log("Failed to parse mixer_reset argument.");
+ goto fail;
+ }
+
u = pa_xnew0(struct userdata, 1);
u->core = m->core;
u->module = m;
m->userdata = u;
u->use_mmap = use_mmap;
- pa_thread_mq_init(&u->thread_mq, m->core->mainloop);
+ u->use_tsched = use_tsched;
u->rtpoll = pa_rtpoll_new();
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
u->alsa_rtpoll_item = NULL;
- pa_rtpoll_item_new_asyncmsgq(u->rtpoll, PA_RTPOLL_EARLY, u->thread_mq.inq);
+
+ u->smoother = pa_smoother_new(DEFAULT_TSCHED_WATERMARK_USEC, DEFAULT_TSCHED_WATERMARK_USEC, TRUE);
+ pa_smoother_set_time_offset(u->smoother, pa_rtclock_usec());
snd_config_update_free_global();
- dev = pa_xstrdup(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE));
+ b = use_mmap;
+ d = use_tsched;
- for (;;) {
+ if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) {
- if ((err = snd_pcm_open(&u->pcm_handle, dev, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK)) < 0) {
- pa_log("Error opening PCM device %s: %s", dev, snd_strerror(err));
- pa_xfree(dev);
+ if (!(u->pcm_handle = pa_alsa_open_by_device_id(
+ dev_id,
+ &u->device_name,
+ &ss, &map,
+ SND_PCM_STREAM_CAPTURE,
+ &nfrags, &period_frames, tsched_frames,
+ &b, &d)))
goto fail;
- }
-
- b = use_mmap;
- if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, &b)) < 0) {
- if (err == -EPERM) {
- /* Hmm, some hw is very exotic, so we retry with plughw, if hw didn't work */
-
- if (pa_startswith(dev, "hw:")) {
- char *d = pa_sprintf_malloc("plughw:%s", dev+3);
- pa_log_debug("Opening the device as '%s' didn't work, retrying with '%s'.", dev, d);
- pa_xfree(dev);
- dev = d;
-
- snd_pcm_close(u->pcm_handle);
- u->pcm_handle = NULL;
- continue;
- }
- }
+ } else {
- pa_log("Failed to set hardware parameters: %s", snd_strerror(err));
- pa_xfree(dev);
+ 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,
+ &nfrags, &period_frames, tsched_frames,
+ &b, &d)))
goto fail;
- }
-
- break;
}
- u->device_name = dev;
+ pa_assert(u->device_name);
+ pa_log_info("Successfully opened device %s.", u->device_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 = b;
+ u->use_mmap = use_mmap = FALSE;
+ }
+
+ if (use_tsched && (!b || !d)) {
+ pa_log_info("Cannot enabled 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 ((err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
pa_log("Error fetching PCM info: %s", snd_strerror(err));
goto fail;
}
- if ((err = pa_alsa_set_sw_params(u->pcm_handle)) < 0) {
- pa_log("Failed to set software parameters: %s", snd_strerror(err));
- goto fail;
- }
-
/* ALSA might tweak the sample spec, so recalculate the frame size */
frame_size = pa_frame_size(&ss);
- if (ss.channels != map.channels)
- /* Seems ALSA didn't like the channel number, so let's fix the channel map */
- pa_channel_map_init_auto(&map, ss.channels, PA_CHANNEL_MAP_ALSA);
-
if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0)
pa_log("Error opening mixer: %s", snd_strerror(err));
else {
+ pa_bool_t found = FALSE;
+
+ if (pa_alsa_prepare_mixer(u->mixer_handle, u->device_name) >= 0)
+ found = TRUE;
+ else {
+ snd_pcm_info_t* info;
+
+ snd_pcm_info_alloca(&info);
+
+ if (snd_pcm_info(u->pcm_handle, info) >= 0) {
+ char *md;
+ int card;
+
+ if ((card = snd_pcm_info_get_card(info)) >= 0) {
+
+ md = pa_sprintf_malloc("hw:%i", card);
+
+ if (strcmp(u->device_name, md))
+ if (pa_alsa_prepare_mixer(u->mixer_handle, md) >= 0)
+ found = TRUE;
+ pa_xfree(md);
+ }
+ }
+ }
+
+ if (found)
+ if (!(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture", "Mic")))
+ found = FALSE;
- if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
- !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture", NULL))) {
+ if (!found) {
snd_mixer_close(u->mixer_handle);
u->mixer_handle = NULL;
}
}
if ((name = pa_modargs_get_value(ma, "source_name", NULL)))
- namereg_fail = 1;
+ namereg_fail = TRUE;
else {
- name = name_buf = pa_sprintf_malloc("alsa_input.%s", dev);
- namereg_fail = 0;
+ name = name_buf = pa_sprintf_malloc("alsa_input.%s", u->device_name);
+ namereg_fail = FALSE;
}
- u->source = pa_source_new(m->core, __FILE__, name, namereg_fail, &ss, &map);
+ pa_source_new_data_init(&data);
+ data.driver = __FILE__;
+ data.module = m;
+ pa_source_new_data_set_name(&data, name);
+ data.namereg_fail = namereg_fail;
+ pa_source_new_data_set_sample_spec(&data, &ss);
+ pa_source_new_data_set_channel_map(&data, &map);
+
+ pa_alsa_init_proplist(data.proplist, pcm_info);
+ 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) (period_frames * frame_size * nfrags));
+ 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"));
+
+ u->source = pa_source_new(m->core, &data, PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY);
+ pa_source_new_data_done(&data);
pa_xfree(name_buf);
if (!u->source) {
}
u->source->parent.process_msg = source_process_msg;
+ u->source->update_requested_latency = source_update_requested_latency_cb;
u->source->userdata = u;
- pa_source_set_module(u->source, m);
pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
pa_source_set_rtpoll(u->source, u->rtpoll);
- pa_source_set_description(u->source, t = pa_sprintf_malloc(
- "ALSA PCM on %s (%s)%s",
- dev,
- snd_pcm_info_get_name(pcm_info),
- use_mmap ? " via DMA" : ""));
- pa_xfree(t);
-
- u->source->flags = PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY|PA_SOURCE_HW_VOLUME_CTRL;
u->frame_size = frame_size;
- u->fragment_size = frag_size = period_size * frame_size;
+ u->fragment_size = frag_size = period_frames * frame_size;
u->nfragments = nfrags;
u->hwbuf_size = u->fragment_size * nfrags;
+ u->hwbuf_unused_frames = 0;
+ u->tsched_watermark = tsched_watermark;
+ u->frame_index = 0;
+ u->hw_dB_supported = FALSE;
+ u->hw_dB_min = u->hw_dB_max = 0;
+ u->hw_volume_min = u->hw_volume_max = 0;
+
+ if (use_tsched)
+ fix_tsched_watermark(u);
- pa_log_info("Using %u fragments of size %lu bytes.", nfrags, (long unsigned) u->fragment_size);
+ u->source->max_latency = pa_bytes_to_usec(u->hwbuf_size, &ss);
+ if (!use_tsched)
+ u->source->min_latency = u->source->max_latency;
+
+ pa_log_info("Using %u fragments of size %lu bytes, buffer time is %0.2fms",
+ nfrags, (long unsigned) u->fragment_size,
+ (double) pa_bytes_to_usec(u->hwbuf_size, &ss) / PA_USEC_PER_MSEC);
+
+ if (use_tsched)
+ pa_log_info("Time scheduling watermark is %0.2fms",
+ (double) pa_bytes_to_usec(u->tsched_watermark, &ss) / PA_USEC_PER_MSEC);
+
+ if (update_sw_params(u) < 0)
+ goto fail;
if (u->mixer_handle) {
pa_assert(u->mixer_elem);
- if (snd_mixer_selem_has_capture_volume(u->mixer_elem)) {
- int i;
+ if (snd_mixer_selem_has_capture_volume(u->mixer_elem))
+ if (pa_alsa_calc_mixer_map(u->mixer_elem, &map, u->mixer_map, FALSE) >= 0 &&
+ snd_mixer_selem_get_capture_volume_range(u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max) >= 0) {
- for (i = 0;i < ss.channels;i++) {
- if (!snd_mixer_selem_has_capture_channel(u->mixer_elem, i))
- break;
- }
+ pa_bool_t suitable = TRUE;
+
+ pa_log_info("Volume ranges from %li to %li.", u->hw_volume_min, u->hw_volume_max);
+
+ if (u->hw_volume_min > u->hw_volume_max) {
+
+ pa_log_info("Minimal volume %li larger than maximum volume %li. Strange stuff Falling back to software volume control.", u->hw_volume_min, u->hw_volume_max);
+ suitable = FALSE;
+
+ } else if (u->hw_volume_max - u->hw_volume_min < 3) {
+
+ pa_log_info("Device has less than 4 volume levels. Falling back to software volume control.");
+ suitable = FALSE;
+
+ } else if (snd_mixer_selem_get_capture_dB_range(u->mixer_elem, &u->hw_dB_min, &u->hw_dB_max) >= 0) {
+
+ pa_log_info("Volume ranges from %0.2f dB to %0.2f dB.", u->hw_dB_min/100.0, u->hw_dB_max/100.0);
+
+ /* Let's see if this thing actually is useful for muting */
+ if (u->hw_dB_min > -6000) {
+ pa_log_info("Device cannot attenuate for more than -60 dB (only %0.2f dB supported), falling back to software volume control.", ((double) u->hw_dB_min) / 100);
+
+ suitable = FALSE;
+ } else if (u->hw_dB_max < 0) {
+
+ pa_log_info("Device is still attenuated at maximum volume setting (%0.2f dB is maximum). Strange stuff. Falling back to software volume control.", ((double) u->hw_dB_max) / 100);
+ suitable = FALSE;
+
+ } else if (u->hw_dB_min >= u->hw_dB_max) {
+
+ pa_log_info("Minimal dB (%0.2f) larger or equal to maximum dB (%0.2f). Strange stuff. Falling back to software volume control.", ((double) u->hw_dB_min) / 100, ((double) u->hw_dB_max) / 100);
+ suitable = FALSE;
+
+ } else
+ u->hw_dB_supported = TRUE;
+ }
+
+ if (suitable) {
+ 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->hw_dB_supported ? PA_SOURCE_DECIBEL_VOLUME : 0);
+ pa_log_info("Using hardware volume control. Hardware dB scale %s.", u->hw_dB_supported ? "supported" : "not supported");
+
+ } else if (mixer_reset) {
+ pa_log_info("Using software volume control. Trying to reset sound card to 0 dB.");
+ pa_alsa_0dB_capture(u->mixer_elem);
+ } else
+ pa_log_info("Using software volume control. Leaving hw mixer controls untouched.");
- if (i == ss.channels) {
- u->source->get_volume = source_get_volume_cb;
- u->source->set_volume = source_set_volume_cb;
- snd_mixer_selem_get_capture_volume_range(u->mixer_elem, &u->hw_volume_min, &u->hw_volume_max);
}
- }
+
if (snd_mixer_selem_has_capture_switch(u->mixer_elem)) {
u->source->get_mute = source_get_mute_cb;
u->source->set_mute = source_set_mute_cb;
+ u->source->flags |= PA_SOURCE_HW_MUTE_CTRL;
}
u->mixer_fdl = pa_alsa_fdlist_new();
if (pa_alsa_fdlist_set_mixer(u->mixer_fdl, u->mixer_handle, m->core->mainloop) < 0) {
- pa_log("failed to initialise file descriptor monitoring");
+ pa_log("Failed to initialize file descriptor monitoring");
goto fail;
}
} else
u->mixer_fdl = NULL;
+ pa_alsa_dump(u->pcm_handle);
+
if (!(u->thread = pa_thread_new(thread_func, u))) {
pa_log("Failed to create thread.");
goto fail;
}
/* Get initial mixer settings */
- if (u->source->get_volume)
- u->source->get_volume(u->source);
- if (u->source->get_mute)
- u->source->get_mute(u->source);
+ 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);
pa_assert(m);
- if (!(u = m->userdata))
+ if (!(u = m->userdata)) {
+ pa_alsa_redirect_errors_dec();
return;
+ }
if (u->source)
pa_source_unlink(u->source);
snd_pcm_close(u->pcm_handle);
}
+ if (u->smoother)
+ pa_smoother_free(u->smoother);
+
pa_xfree(u->device_name);
pa_xfree(u);
snd_config_update_free_global();
+ pa_alsa_redirect_errors_dec();
}