#include <asoundlib.h>
+#include <polyp/xmalloc.h>
+
+#include <polypcore/core-error.h>
#include <polypcore/core.h>
#include <polypcore/module.h>
#include <polypcore/memchunk.h>
#include <polypcore/sink.h>
#include <polypcore/modargs.h>
-#include <polypcore/util.h>
+#include <polypcore/core-util.h>
#include <polypcore/sample-util.h>
-#include <polypcore/xmalloc.h>
#include <polypcore/log.h>
-#include "module-alsa-source-symdef.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_USAGE("source_name=<name for the source> device=<ALSA device> format=<sample format> channels=<number of channels> rate=<sample rate> fragments=<number of fragments> fragment_size=<fragment size>")
+PA_MODULE_USAGE(
+ "source_name=<name for the source> "
+ "device=<ALSA device> "
+ "format=<sample format> "
+ "channels=<number of channels> "
+ "rate=<sample rate> "
+ "fragments=<number of fragments> "
+ "fragment_size=<fragment size> "
+ "channel_map=<channel map>")
struct userdata {
snd_pcm_t *pcm_handle;
+ snd_mixer_t *mixer_handle;
+ snd_mixer_elem_t *mixer_elem;
pa_source *source;
- pa_io_event **io_events;
- unsigned n_io_events;
+ struct pa_alsa_fdlist *pcm_fdl;
+ struct pa_alsa_fdlist *mixer_fdl;
+ long hw_volume_max, hw_volume_min;
size_t frame_size, fragment_size;
pa_memchunk memchunk;
"format",
"fragments",
"fragment_size",
+ "channel_map",
NULL
};
#define DEFAULT_SOURCE_NAME "alsa_input"
-#define DEFAULT_DEVICE "hw:0,0"
+#define DEFAULT_DEVICE "default"
static void update_usage(struct userdata *u) {
pa_module_set_used(u->module,
static void xrun_recovery(struct userdata *u) {
assert(u);
- pa_log(__FILE__": *** ALSA-XRUN (capture) ***\n");
+ pa_log(__FILE__": *** ALSA-XRUN (capture) ***");
if (snd_pcm_prepare(u->pcm_handle) < 0)
- pa_log(__FILE__": snd_pcm_prepare() failed\n");
+ pa_log(__FILE__": snd_pcm_prepare() failed");
}
static void do_read(struct userdata *u) {
u->memchunk.index = 0;
}
- assert(u->memchunk.memblock && u->memchunk.memblock->data && u->memchunk.length && u->memchunk.memblock->length && (u->memchunk.length % u->frame_size) == 0);
+ assert(u->memchunk.memblock);
+ assert(u->memchunk.length);
+ assert(u->memchunk.memblock->data);
+ assert(u->memchunk.memblock->length);
+ assert(u->memchunk.length % u->frame_size == 0);
if ((frames = snd_pcm_readi(u->pcm_handle, (uint8_t*) u->memchunk.memblock->data + u->memchunk.index, u->memchunk.length / u->frame_size)) < 0) {
if (frames == -EAGAIN)
continue;
}
- pa_log(__FILE__": snd_pcm_readi() failed: %s\n", strerror(-frames));
+ pa_log(__FILE__": snd_pcm_readi() failed: %s", pa_cstrerror(-frames));
return;
}
}
}
-static void io_callback(pa_mainloop_api*a, pa_io_event *e, PA_GCC_UNUSED int fd, PA_GCC_UNUSED pa_io_event_flags_t f, void *userdata) {
+static void fdl_callback(void *userdata) {
struct userdata *u = userdata;
- assert(u && a && e);
+ assert(u);
if (snd_pcm_state(u->pcm_handle) == SND_PCM_STATE_XRUN)
xrun_recovery(u);
do_read(u);
}
+static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
+ struct userdata *u = snd_mixer_elem_get_callback_private(elem);
+
+ assert(u && u->mixer_handle);
+
+ if (mask == SND_CTL_EVENT_MASK_REMOVE)
+ return 0;
+
+ if (mask & SND_CTL_EVENT_MASK_VALUE) {
+ if (u->source->get_hw_volume)
+ u->source->get_hw_volume(u->source);
+ if (u->source->get_hw_mute)
+ u->source->get_hw_mute(u->source);
+ pa_subscription_post(u->source->core,
+ PA_SUBSCRIPTION_EVENT_SOURCE|PA_SUBSCRIPTION_EVENT_CHANGE,
+ u->source->index);
+ }
+
+ return 0;
+}
+
static pa_usec_t source_get_latency_cb(pa_source *s) {
struct userdata *u = s->userdata;
snd_pcm_sframes_t frames;
assert(s && u && u->source);
if (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
- pa_log(__FILE__": failed to get delay\n");
+ pa_log(__FILE__": failed to get delay");
s->get_latency = NULL;
return 0;
}
return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
}
+static int source_get_hw_volume_cb(pa_source *s) {
+ struct userdata *u = s->userdata;
+ long vol;
+ int err;
+ int i;
+
+ assert(u && u->mixer_elem);
+
+ for (i = 0;i < s->hw_volume.channels;i++) {
+ assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+
+ err = snd_mixer_selem_get_capture_volume(u->mixer_elem, i, &vol);
+ if (err < 0)
+ goto fail;
+ s->hw_volume.values[i] =
+ (vol - u->hw_volume_min) * PA_VOLUME_NORM / (u->hw_volume_max - u->hw_volume_min);
+ }
+
+ return 0;
+
+fail:
+ pa_log_error(__FILE__": Unable to read volume: %s", snd_strerror(err));
+ s->get_hw_volume = NULL;
+ s->set_hw_volume = NULL;
+ return -1;
+}
+
+static int source_set_hw_volume_cb(pa_source *s) {
+ struct userdata *u = s->userdata;
+ int err;
+ pa_volume_t vol;
+ int i;
+
+ assert(u && u->mixer_elem);
+
+ for (i = 0;i < s->hw_volume.channels;i++) {
+ assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+
+ vol = s->hw_volume.values[i];
+
+ if (vol > PA_VOLUME_NORM)
+ vol = PA_VOLUME_NORM;
+
+ vol = vol * (u->hw_volume_max - u->hw_volume_min) /
+ PA_VOLUME_NORM + u->hw_volume_min;
+ err = snd_mixer_selem_set_capture_volume(u->mixer_elem, i, vol);
+ if (err < 0)
+ goto fail;
+ }
+
+ return 0;
+
+fail:
+ pa_log_error(__FILE__": Unable to set volume: %s", snd_strerror(err));
+ s->get_hw_volume = NULL;
+ s->set_hw_volume = NULL;
+ return -1;
+}
+
+static int source_get_hw_mute_cb(pa_source *s) {
+ struct userdata *u = s->userdata;
+ int err, sw;
+
+ assert(u && u->mixer_elem);
+
+ err = snd_mixer_selem_get_capture_switch(u->mixer_elem, 0, &sw);
+ if (err) {
+ pa_log_error(__FILE__": Unable to get switch: %s", snd_strerror(err));
+ s->get_hw_mute = NULL;
+ s->set_hw_mute = NULL;
+ return -1;
+ }
+
+ s->hw_muted = !sw;
+
+ return 0;
+}
+
+static int source_set_hw_mute_cb(pa_source *s) {
+ struct userdata *u = s->userdata;
+ int err;
+
+ assert(u && u->mixer_elem);
+
+ err = snd_mixer_selem_set_capture_switch_all(u->mixer_elem, !s->hw_muted);
+ if (err) {
+ pa_log_error(__FILE__": Unable to set switch: %s", snd_strerror(err));
+ s->get_hw_mute = NULL;
+ s->set_hw_mute = NULL;
+ return -1;
+ }
+
+ return 0;
+}
+
int pa__init(pa_core *c, pa_module*m) {
pa_modargs *ma = NULL;
int ret = -1;
struct userdata *u = NULL;
const char *dev;
pa_sample_spec ss;
+ pa_channel_map map;
unsigned periods, fragsize;
snd_pcm_uframes_t period_size;
size_t frame_size;
+ snd_pcm_info_t *pcm_info = NULL;
int err;
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log(__FILE__": failed to parse module arguments\n");
+ pa_log(__FILE__": failed to parse module arguments");
goto fail;
}
ss = c->default_sample_spec;
- if (pa_modargs_get_sample_spec(ma, &ss) < 0) {
- pa_log(__FILE__": failed to parse sample specification\n");
+ if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_ALSA) < 0) {
+ pa_log(__FILE__": failed to parse sample specification");
goto fail;
}
+
frame_size = pa_frame_size(&ss);
-
+
+ /* Fix latency to 100ms */
periods = 12;
- fragsize = 1024;
+ fragsize = pa_bytes_per_second(&ss)/128;
+
if (pa_modargs_get_value_u32(ma, "fragments", &periods) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &fragsize) < 0) {
- pa_log(__FILE__": failed to parse buffer metrics\n");
+ pa_log(__FILE__": failed to parse buffer metrics");
goto fail;
}
- period_size = fragsize;
+ period_size = fragsize/frame_size;
u = pa_xmalloc0(sizeof(struct userdata));
m->userdata = u;
snd_config_update_free_global();
if ((err = snd_pcm_open(&u->pcm_handle, dev = pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK)) < 0) {
- pa_log(__FILE__": Error opening PCM device %s: %s\n", dev, snd_strerror(err));
+ pa_log(__FILE__": Error opening PCM device %s: %s", dev, snd_strerror(err));
+ goto fail;
+ }
+
+ if ((err = snd_pcm_info_malloc(&pcm_info)) < 0 ||
+ (err = snd_pcm_info(u->pcm_handle, pcm_info)) < 0) {
+ pa_log(__FILE__": Error fetching PCM info: %s", snd_strerror(err));
goto fail;
}
if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &periods, &period_size)) < 0) {
- pa_log(__FILE__": Failed to set hardware parameters: %s\n", snd_strerror(err));
+ pa_log(__FILE__": Failed to set hardware parameters: %s", snd_strerror(err));
+ goto fail;
+ }
+
+ if ((err = snd_mixer_open(&u->mixer_handle, 0)) < 0) {
+ pa_log(__FILE__": Error opening mixer: %s", snd_strerror(err));
goto fail;
}
- u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, NULL);
+ if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
+ !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture"))) {
+ snd_mixer_close(u->mixer_handle);
+ u->mixer_handle = NULL;
+ }
+
+ u->source = pa_source_new(c, __FILE__, pa_modargs_get_value(ma, "source_name", DEFAULT_SOURCE_NAME), 0, &ss, &map);
assert(u->source);
u->source->userdata = u;
u->source->get_latency = source_get_latency_cb;
+ if (u->mixer_handle) {
+ assert(u->mixer_elem);
+ if (snd_mixer_selem_has_capture_volume(u->mixer_elem)) {
+ int i;
+
+ for (i = 0;i < ss.channels;i++) {
+ if (!snd_mixer_selem_has_capture_channel(u->mixer_elem, i))
+ break;
+ }
+
+ if (i == ss.channels) {
+ u->source->get_hw_volume = source_get_hw_volume_cb;
+ u->source->set_hw_volume = source_set_hw_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_hw_mute = source_get_hw_mute_cb;
+ u->source->set_hw_mute = source_set_hw_mute_cb;
+ }
+ }
pa_source_set_owner(u->source, m);
- u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s'", dev);
+ u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev, snd_pcm_info_get_name(pcm_info));
- if (pa_create_io_events(u->pcm_handle, c->mainloop, &u->io_events, &u->n_io_events, io_callback, u) < 0) {
- pa_log(__FILE__": failed to obtain file descriptors\n");
+ u->pcm_fdl = pa_alsa_fdlist_new();
+ assert(u->pcm_fdl);
+ if (pa_alsa_fdlist_init_pcm(u->pcm_fdl, u->pcm_handle, c->mainloop, fdl_callback, u) < 0) {
+ pa_log(__FILE__": failed to initialise file descriptor monitoring");
goto fail;
}
+ if (u->mixer_handle) {
+ u->mixer_fdl = pa_alsa_fdlist_new();
+ assert(u->mixer_fdl);
+ if (pa_alsa_fdlist_init_mixer(u->mixer_fdl, u->mixer_handle, c->mainloop) < 0) {
+ pa_log(__FILE__": failed to initialise file descriptor monitoring");
+ goto fail;
+ }
+ snd_mixer_elem_set_callback(u->mixer_elem, mixer_callback);
+ snd_mixer_elem_set_callback_private(u->mixer_elem, u);
+ }
+
u->frame_size = frame_size;
- u->fragment_size = period_size;
+ u->fragment_size = period_size * frame_size;
- pa_log(__FILE__": using %u fragments of size %u bytes.\n", periods, u->fragment_size);
+ pa_log_info(__FILE__": using %u fragments of size %lu bytes.", periods, (long unsigned) u->fragment_size);
u->memchunk.memblock = NULL;
u->memchunk.index = u->memchunk.length = 0;
ret = 0;
+ /* Get initial mixer settings */
+ if (u->source->get_hw_volume)
+ u->source->get_hw_volume(u->source);
+ if (u->source->get_hw_mute)
+ u->source->get_hw_mute(u->source);
+
finish:
if (ma)
pa_modargs_free(ma);
+
+ if (pcm_info)
+ snd_pcm_info_free(pcm_info);
return ret;
pa_source_unref(u->source);
}
- if (u->io_events)
- pa_free_io_events(c->mainloop, u->io_events, u->n_io_events);
+ if (u->pcm_fdl)
+ pa_alsa_fdlist_free(u->pcm_fdl);
+ if (u->mixer_fdl)
+ pa_alsa_fdlist_free(u->mixer_fdl);
+
+ if (u->mixer_handle)
+ snd_mixer_close(u->mixer_handle);
if (u->pcm_handle) {
snd_pcm_drop(u->pcm_handle);