/* $Id$ */
/***
- This file is part of polypaudio.
-
- polypaudio is free software; you can redistribute it and/or modify
+ This file is part of PulseAudio.
+
+ Copyright 2004-2006 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 of the License,
or (at your option) any later version.
-
- polypaudio is distributed in the hope that it will be useful, but
+
+ 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 polypaudio; if not, write to the Free Software
+ along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <asoundlib.h>
-#include <polyp/error.h>
-#include <polyp/xmalloc.h>
-
-#include <polypcore/core.h>
-#include <polypcore/module.h>
-#include <polypcore/memchunk.h>
-#include <polypcore/sink.h>
-#include <polypcore/modargs.h>
-#include <polypcore/core-util.h>
-#include <polypcore/sample-util.h>
-#include <polypcore/log.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-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 "alsa-util.h"
#include "module-alsa-source-symdef.h"
"rate=<sample rate> "
"fragments=<number of fragments> "
"fragment_size=<fragment size> "
- "channel_map=<channel map>")
+ "channel_map=<channel map> "
+ "mmap=<enable memory mapping?>")
+
+#define DEFAULT_DEVICE "default"
struct userdata {
+ pa_core *core;
+ pa_module *module;
+ pa_source *source;
+ pa_thread *thread;
+ pa_thread_mq thread_mq;
+
snd_pcm_t *pcm_handle;
+
+ pa_alsa_fdlist *mixer_fdl;
snd_mixer_t *mixer_handle;
snd_mixer_elem_t *mixer_elem;
- pa_source *source;
- 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;
- pa_module *module;
+ size_t frame_size, fragment_size, hwbuf_size;
+ unsigned nfragments;
+
+ char *device_name;
+
+ int use_mmap;
+
+ struct pollfd *pollfd;
+ int n_alsa_fds;
+};
+
+enum {
+ POLLFD_ASYNCQ,
+ POLLFD_ALSA_BASE
};
static const char* const valid_modargs[] = {
"fragments",
"fragment_size",
"channel_map",
+ "mmap",
NULL
};
-#define DEFAULT_SOURCE_NAME "alsa_input"
-#define DEFAULT_DEVICE "default"
+static int mmap_read(struct userdata *u) {
+ snd_pcm_sframes_t n;
+ int err;
+ const snd_pcm_channel_area_t *areas;
+ snd_pcm_uframes_t offset, frames;
+ int work_done = 0;
+
+ pa_assert(u);
+ pa_assert(u->source);
-static void update_usage(struct userdata *u) {
- pa_module_set_used(u->module,
- (u->source ? pa_idxset_size(u->source->outputs) : 0));
-}
+ for (;;) {
+ pa_memchunk chunk;
+ void *p;
+
+ if ((n = snd_pcm_avail_update(u->pcm_handle)) < 0) {
-static void xrun_recovery(struct userdata *u) {
- assert(u);
+ if (n == -EPIPE)
+ pa_log_debug("snd_pcm_avail_update: Buffer underrun!");
+
+ if ((err = snd_pcm_recover(u->pcm_handle, n, 1)) == 0)
+ continue;
- pa_log(__FILE__": *** ALSA-XRUN (capture) ***");
-
- if (snd_pcm_prepare(u->pcm_handle) < 0)
- pa_log(__FILE__": snd_pcm_prepare() failed");
-}
+ if (err == -EAGAIN)
+ return work_done;
+
+ pa_log("snd_pcm_avail_update: %s", snd_strerror(n));
+ return -1;
+ }
-static void do_read(struct userdata *u) {
- assert(u);
+/* pa_log("Got request for %i samples", (int) n); */
+
+ if (n <= 0)
+ return work_done;
- update_usage(u);
-
- for (;;) {
- pa_memchunk post_memchunk;
- snd_pcm_sframes_t frames;
- size_t l;
+ frames = n;
- if (!u->memchunk.memblock) {
- u->memchunk.memblock = pa_memblock_new(u->memchunk.length = u->fragment_size, u->source->core->memblock_stat);
- u->memchunk.index = 0;
- }
+ if ((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 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)
- return;
-
- if (frames == -EPIPE) {
- xrun_recovery(u);
+ if (err == -EPIPE)
+ pa_log_debug("snd_pcm_mmap_begin: Buffer underrun!");
+
+ if ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0)
continue;
- }
- pa_log(__FILE__": snd_pcm_readi() failed: %s", pa_cstrerror(-frames));
- return;
+ if (err == -EAGAIN)
+ return work_done;
+
+ pa_log("Failed to write data to DSP: %s", snd_strerror(err));
+ return -1;
}
- l = frames * u->frame_size;
-
- post_memchunk = u->memchunk;
- post_memchunk.length = l;
+ /* Check these are multiples of 8 bit */
+ pa_assert((areas[0].first & 7) == 0);
+ pa_assert((areas[0].step & 7)== 0);
- pa_source_post(u->source, &post_memchunk);
+ /* We assume a single interleaved memory buffer */
+ pa_assert((areas[0].first >> 3) == 0);
+ pa_assert((areas[0].step >> 3) == u->frame_size);
- u->memchunk.index += l;
- u->memchunk.length -= l;
+ p = (uint8_t*) areas[0].addr + (offset * u->frame_size);
- if (u->memchunk.length == 0) {
- pa_memblock_unref(u->memchunk.memblock);
- u->memchunk.memblock = NULL;
- u->memchunk.index = u->memchunk.length = 0;
+ chunk.memblock = pa_memblock_new_fixed(u->core->mempool, p, frames * u->frame_size, 1);
+ 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 ((err = snd_pcm_recover(u->pcm_handle, err, 1)) == 0)
+ continue;
+
+ if (err == -EAGAIN)
+ return work_done;
+
+ pa_log("Failed to write data to DSP: %s", snd_strerror(err));
+ return -1;
}
-
- break;
+
+ work_done = 1;
+
+/* pa_log("wrote %i samples", (int) frames); */
}
}
-static void fdl_callback(void *userdata) {
- struct userdata *u = userdata;
- assert(u);
+static pa_usec_t source_get_latency(struct userdata *u) {
+ pa_usec_t r = 0;
+ snd_pcm_sframes_t frames = 0;
+ int err;
+
+ pa_assert(u);
+
+ snd_pcm_avail_update(u->pcm_handle);
+
+ if ((err = snd_pcm_delay(u->pcm_handle, &frames)) < 0) {
+ pa_log("Failed to get delay: %s", snd_strerror(err));
+ return 0;
+ }
- if (snd_pcm_state(u->pcm_handle) == SND_PCM_STATE_XRUN)
- xrun_recovery(u);
+ if (frames > 0)
+ r = pa_bytes_to_usec(frames * u->frame_size, &u->source->sample_spec);
- do_read(u);
+ return r;
}
-static int mixer_callback(snd_mixer_elem_t *elem, unsigned int mask) {
- struct userdata *u = snd_mixer_elem_get_callback_private(elem);
+static int build_pollfd(struct userdata *u) {
+ int err;
+
+ pa_assert(u);
+ pa_assert(u->pcm_handle);
+
+ if ((u->n_alsa_fds = snd_pcm_poll_descriptors_count(u->pcm_handle)) < 0) {
+ pa_log("snd_pcm_poll_descriptors_count() failed: %s", snd_strerror(u->n_alsa_fds));
+ return -1;
+ }
- assert(u && u->mixer_handle);
+ pa_xfree(u->pollfd);
+ u->pollfd = pa_xnew0(struct pollfd, POLLFD_ALSA_BASE + u->n_alsa_fds);
- if (mask == SND_CTL_EVENT_MASK_REMOVE)
- return 0;
+ u->pollfd[POLLFD_ASYNCQ].fd = pa_asyncmsgq_get_fd(u->thread_mq.inq);
+ u->pollfd[POLLFD_ASYNCQ].events = POLLIN;
- 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);
+ if ((err = snd_pcm_poll_descriptors(u->pcm_handle, u->pollfd+POLLFD_ALSA_BASE, u->n_alsa_fds)) < 0) {
+ pa_log("snd_pcm_poll_descriptors() failed: %s", snd_strerror(err));
+ return -1;
}
+
+ return 0;
+}
+
+static int suspend(struct userdata *u) {
+ pa_assert(u);
+ pa_assert(u->pcm_handle);
+ /* Let's suspend */
+ snd_pcm_close(u->pcm_handle);
+ u->pcm_handle = NULL;
+
+ pa_log_debug("Device suspended...");
+
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);
+static int unsuspend(struct userdata *u) {
+ pa_sample_spec ss;
+ int err, b;
+ unsigned nfrags;
+ snd_pcm_uframes_t period_size;
+
+ pa_assert(u);
+ pa_assert(!u->pcm_handle);
+
+ pa_log_debug("Trying resume...");
+
+ snd_config_update_free_global();
+ if ((err = snd_pcm_open(&u->pcm_handle, u->device_name, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK)) < 0) {
+ pa_log("Error opening PCM device %s: %s", u->device_name, snd_strerror(err));
+ goto fail;
+ }
+
+ ss = u->source->sample_spec;
+ nfrags = u->nfragments;
+ period_size = u->fragment_size / u->frame_size;
+ b = u->use_mmap;
+
+ if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, &b)) < 0) {
+ pa_log("Failed to set hardware parameters: %s", snd_strerror(err));
+ goto fail;
+ }
+
+ if (b != u->use_mmap) {
+ 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 (nfrags != u->nfragments || period_size*u->frame_size != u->fragment_size) {
+ pa_log_warn("Resume failed, couldn't restore original fragment settings.");
+ 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;
+ }
+
+ if (build_pollfd(u) < 0)
+ goto fail;
+
+ snd_pcm_start(u->pcm_handle);
+
+ /* FIXME: We need to reload the volume somehow */
+
+ pa_log_debug("Resumed successfully...");
+
+ return 0;
+
+fail:
+ if (u->pcm_handle) {
+ snd_pcm_close(u->pcm_handle);
+ u->pcm_handle = NULL;
+ }
+
+ return -1;
+}
+
+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;
+
+ break;
+ }
+
+ case PA_SOURCE_MESSAGE_SET_STATE:
+
+ switch ((pa_source_state_t) PA_PTR_TO_UINT(data)) {
+
+ case PA_SOURCE_SUSPENDED:
+ pa_assert(PA_SOURCE_OPENED(u->source->thread_info.state));
+
+ if (suspend(u) < 0)
+ return -1;
+
+ break;
+
+ case PA_SOURCE_IDLE:
+ case PA_SOURCE_RUNNING:
+
+ if (u->source->thread_info.state == PA_SOURCE_SUSPENDED) {
+ if (unsuspend(u) < 0)
+ return -1;
+ }
+
+ break;
+
+ case PA_SOURCE_DISCONNECTED:
+ ;
+ }
+
+ break;
+ }
+
+ return pa_source_process_msg(o, code, data, offset, chunk);
+}
+
+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 (snd_pcm_delay(u->pcm_handle, &frames) < 0) {
- pa_log(__FILE__": failed to get delay");
- s->get_latency = NULL;
+ if (mask == SND_CTL_EVENT_MASK_REMOVE)
return 0;
+
+ if (mask & SND_CTL_EVENT_MASK_VALUE) {
+ pa_source_get_volume(u->source);
+ pa_source_get_mute(u->source);
}
- return pa_bytes_to_usec(frames * u->frame_size, &s->sample_spec);
+ return 0;
}
-static int source_get_hw_volume_cb(pa_source *s) {
+static int source_get_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
- long vol;
int err;
int i;
- assert(u && u->mixer_elem);
+ pa_assert(u);
+ pa_assert(u->mixer_elem);
- for (i = 0;i < s->hw_volume.channels;i++) {
- assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+ for (i = 0; i < s->sample_spec.channels; i++) {
+ long set_vol, vol;
- err = snd_mixer_selem_get_capture_volume(u->mixer_elem, i, &vol);
- if (err < 0)
+ pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+
+ if ((err = snd_mixer_selem_get_capture_volume(u->mixer_elem, i, &vol)) < 0)
goto fail;
- s->hw_volume.values[i] =
- (vol - u->hw_volume_min) * PA_VOLUME_NORM / (u->hw_volume_max - u->hw_volume_min);
+
+ set_vol = (long) roundf(((float) s->volume.values[i] * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min;
+
+ /* 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));
}
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;
+ pa_log_error("Unable to read volume: %s", snd_strerror(err));
+
+ s->get_volume = NULL;
+ s->set_volume = NULL;
return -1;
}
-static int source_set_hw_volume_cb(pa_source *s) {
+static int source_set_volume_cb(pa_source *s) {
struct userdata *u = s->userdata;
int err;
- pa_volume_t vol;
int i;
- assert(u && u->mixer_elem);
+ pa_assert(u);
+ pa_assert(u->mixer_elem);
- for (i = 0;i < s->hw_volume.channels;i++) {
- assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+ for (i = 0; i < s->sample_spec.channels; i++) {
+ long alsa_vol;
+ pa_volume_t vol;
- vol = s->hw_volume.values[i];
+ pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, i));
+
+ vol = s->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)
+ alsa_vol = (long) roundf(((float) vol * (u->hw_volume_max - u->hw_volume_min)) / PA_VOLUME_NORM) + u->hw_volume_min;
+
+ if ((err = snd_mixer_selem_set_capture_volume(u->mixer_elem, i, alsa_vol)) < 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;
+ pa_log_error("Unable to set volume: %s", snd_strerror(err));
+
+ s->get_volume = NULL;
+ s->set_volume = NULL;
return -1;
}
-static int source_get_hw_mute_cb(pa_source *s) {
+static int source_get_mute_cb(pa_source *s) {
struct userdata *u = s->userdata;
int err, sw;
- assert(u && u->mixer_elem);
+ pa_assert(u);
+ pa_assert(u->mixer_elem);
+
+ 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));
- 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;
+ s->get_mute = NULL;
+ s->set_mute = NULL;
return -1;
}
- s->hw_muted = !sw;
+ s->muted = !sw;
return 0;
}
-static int source_set_hw_mute_cb(pa_source *s) {
+static int source_set_mute_cb(pa_source *s) {
struct userdata *u = s->userdata;
int err;
- assert(u && u->mixer_elem);
+ pa_assert(u);
+ pa_assert(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;
+ 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;
}
-int pa__init(pa_core *c, pa_module*m) {
+static void thread_func(void *userdata) {
+
+ struct userdata *u = userdata;
+ int err;
+ unsigned short revents = 0;
+ snd_pcm_status_t *status;
+
+ pa_assert(u);
+ snd_pcm_status_alloca(&status);
+
+ pa_log_debug("Thread starting up");
+
+ pa_thread_mq_install(&u->thread_mq);
+
+ if (build_pollfd(u) < 0)
+ goto fail;
+
+ for (;;) {
+ pa_msgobject *object;
+ int code;
+ void *data;
+ int r;
+ int64_t offset;
+ pa_memchunk chunk;
+
+/* pa_log("loop"); */
+
+ /* Check whether there is a message for us to process */
+ if (pa_asyncmsgq_get(u->thread_mq.inq, &object, &code, &data, &offset, &chunk, 0) == 0) {
+ int ret;
+
+/* pa_log("processing msg"); */
+
+ if (!object && code == PA_MESSAGE_SHUTDOWN) {
+ pa_asyncmsgq_done(u->thread_mq.inq, 0);
+ goto finish;
+ }
+
+ ret = pa_asyncmsgq_dispatch(object, code, data, offset, &chunk);
+ pa_asyncmsgq_done(u->thread_mq.inq, ret);
+ continue;
+ }
+
+/* pa_log("loop2"); */
+
+ /* Render some data and write it to the dsp */
+
+ if (PA_SOURCE_OPENED(u->source->thread_info.state) && (revents & POLLIN)) {
+ int work_done = 0;
+ pa_assert(u->pcm_handle);
+
+ if (u->use_mmap) {
+
+ if ((work_done = mmap_read(u)) < 0)
+ goto fail;
+
+ } else {
+
+ for (;;) {
+ void *p;
+ snd_pcm_sframes_t t;
+ ssize_t l;
+
+ if ((err = snd_pcm_status(u->pcm_handle, status)) < 0) {
+ pa_log("Failed to query DSP status data: %s", snd_strerror(t));
+ goto fail;
+ }
+
+ if (snd_pcm_status_get_avail_max(status)*u->frame_size >= u->hwbuf_size)
+ pa_log_debug("Buffer overrun!");
+
+ l = snd_pcm_status_get_avail(status) * u->frame_size;
+
+ if (l <= 0)
+ break;
+
+ chunk.memblock = pa_memblock_new(u->core->mempool, l);
+
+ p = pa_memblock_acquire(chunk.memblock);
+ t = snd_pcm_readi(u->pcm_handle, (uint8_t*) p, l / u->frame_size);
+ 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);
+
+ if (t < 0) {
+ pa_memblock_unref(chunk.memblock);
+
+ if ((t = snd_pcm_recover(u->pcm_handle, t, 1)) == 0)
+ continue;
+
+ if (t == -EAGAIN) {
+ pa_log_debug("EAGAIN");
+ break;
+ } else {
+ pa_log("Failed to read data from DSP: %s", snd_strerror(t));
+ goto fail;
+ }
+
+ }
+
+ chunk.index = 0;
+ chunk.length = t * u->frame_size;
+
+ pa_source_post(u->source, &chunk);
+ pa_memblock_unref(chunk.memblock);
+
+ work_done = 1;
+
+ if (t * u->frame_size >= (unsigned) l)
+ break;
+ }
+ }
+
+ revents &= ~POLLIN;
+
+ if (work_done)
+ continue;
+ }
+
+ /* Hmm, nothing to do. Let's sleep */
+ if (pa_asyncmsgq_before_poll(u->thread_mq.inq) < 0)
+ continue;
+
+/* pa_log("polling for %i", POLLFD_ALSA_BASE + (PA_SOURCE_OPENED(u->source->thread_info.state) ? n_alsa_fds : 0)); */
+ r = poll(u->pollfd, POLLFD_ALSA_BASE + (PA_SOURCE_OPENED(u->source->thread_info.state) ? u->n_alsa_fds : 0), -1);
+/* pa_log("poll end"); */
+
+ pa_asyncmsgq_after_poll(u->thread_mq.inq);
+
+ if (r < 0) {
+ if (errno == EINTR) {
+ u->pollfd[POLLFD_ASYNCQ].revents = 0;
+ revents = 0;
+ continue;
+ }
+
+ pa_log("poll() failed: %s", pa_cstrerror(errno));
+ goto fail;
+ }
+
+ pa_assert(r > 0);
+
+ if (PA_SOURCE_OPENED(u->source->thread_info.state)) {
+ if ((err = snd_pcm_poll_descriptors_revents(u->pcm_handle, u->pollfd + POLLFD_ALSA_BASE, u->n_alsa_fds, &revents)) < 0) {
+ pa_log("snd_pcm_poll_descriptors_revents() failed: %s", snd_strerror(err));
+ goto fail;
+ }
+
+ if (revents & (POLLERR|POLLNVAL|POLLHUP)) {
+ 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");
+
+ goto fail;
+ }
+/* pa_log("got alsa event"); */
+ } else
+ revents = 0;
+
+ pa_assert((u->pollfd[POLLFD_ASYNCQ].revents & ~POLLIN) == 0);
+ }
+
+fail:
+ /* We have to continue processing messages until we receive the
+ * SHUTDOWN message */
+ 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");
+}
+
+int pa__init(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;
+ unsigned nfrags, frag_size;
snd_pcm_uframes_t period_size;
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_assert(m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
- pa_log(__FILE__": failed to parse module arguments");
+ pa_log("Failed to parse module arguments");
goto fail;
}
- ss = c->default_sample_spec;
+ ss = m->core->default_sample_spec;
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");
+ pa_log("Failed to parse sample specification");
goto fail;
}
frame_size = pa_frame_size(&ss);
- /* Fix latency to 100ms */
- periods = 12;
- 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");
+ nfrags = m->core->default_n_fragments;
+ frag_size = pa_usec_to_bytes(m->core->default_fragment_size_msec*1000, &ss);
+ if (frag_size <= 0)
+ frag_size = frame_size;
+
+ if (pa_modargs_get_value_u32(ma, "fragments", &nfrags) < 0 || pa_modargs_get_value_u32(ma, "fragment_size", &frag_size) < 0) {
+ pa_log("Failed to parse buffer metrics");
+ goto fail;
+ }
+ period_size = frag_size/frame_size;
+
+ if (pa_modargs_get_value_boolean(ma, "mmap", &use_mmap) < 0) {
+ pa_log("Failed to parse mmap argument.");
goto fail;
}
- period_size = fragsize/frame_size;
- u = pa_xmalloc0(sizeof(struct userdata));
- m->userdata = u;
+ u = pa_xnew0(struct userdata, 1);
+ u->core = m->core;
u->module = m;
-
+ m->userdata = u;
+ u->use_mmap = use_mmap;
+ u->n_alsa_fds = 0;
+ u->pollfd = NULL;
+ pa_thread_mq_init(&u->thread_mq, m->core->mainloop);
+
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", dev, snd_strerror(err));
+ pa_log("Error opening PCM device %s: %s", dev, snd_strerror(err));
goto fail;
}
+ u->device_name = pa_xstrdup(dev);
+
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));
+ pa_log("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", snd_strerror(err));
+ b = use_mmap;
+ if ((err = pa_alsa_set_hw_params(u->pcm_handle, &ss, &nfrags, &period_size, &b)) < 0) {
+ pa_log("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));
+ 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;
+ }
+
+ if (u->use_mmap)
+ pa_log_info("Successfully enabled mmap() mode.");
+
+ 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 ((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;
+ 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 {
+
+ if ((pa_alsa_prepare_mixer(u->mixer_handle, dev) < 0) ||
+ !(u->mixer_elem = pa_alsa_find_elem(u->mixer_handle, "Capture", NULL))) {
+ 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);
+ if ((name = pa_modargs_get_value(ma, "source_name", NULL)))
+ namereg_fail = 1;
+ else {
+ name = name_buf = pa_sprintf_malloc("alsa_input.%s", dev);
+ namereg_fail = 0;
+ }
+ u->source = pa_source_new(m->core, __FILE__, name, namereg_fail, &ss, &map);
+ pa_xfree(name_buf);
+
+ if (!u->source) {
+ pa_log("Failed to create source object");
+ goto fail;
+ }
+
+ u->source->parent.process_msg = source_process_msg;
u->source->userdata = u;
- u->source->get_latency = source_get_latency_cb;
+
+ pa_source_set_module(u->source, m);
+ pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
+ 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->is_hardware = 1;
+
+ u->frame_size = frame_size;
+ u->fragment_size = frag_size = period_size * frame_size;
+ u->nfragments = nfrags;
+ u->hwbuf_size = u->fragment_size * nfrags;
+
+ pa_log_info("Using %u fragments of size %lu bytes.", nfrags, (long unsigned) u->fragment_size);
+
if (u->mixer_handle) {
assert(u->mixer_elem);
+
if (snd_mixer_selem_has_capture_volume(u->mixer_elem)) {
int i;
}
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);
+ 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_hw_mute = source_get_hw_mute_cb;
- u->source->set_hw_mute = source_set_hw_mute_cb;
+ u->source->get_mute = source_get_mute_cb;
+ u->source->set_mute = source_set_mute_cb;
}
- }
- pa_source_set_owner(u->source, m);
- u->source->description = pa_sprintf_malloc("Advanced Linux Sound Architecture PCM on '%s' (%s)", dev, snd_pcm_info_get_name(pcm_info));
- 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");
+
+ if (pa_alsa_fdlist_set_mixer(u->mixer_fdl, u->mixer_handle, m->core->mainloop) < 0) {
+ pa_log("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 * frame_size;
+ } else
+ u->mixer_fdl = NULL;
- 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;
+ 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);
snd_pcm_start(u->pcm_handle);
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 (ma)
+ pa_modargs_free(ma);
+
if (pcm_info)
snd_pcm_info_free(pcm_info);
-
+
return ret;
fail:
-
+
if (u)
- pa__done(c, m);
+ pa__done(m);
goto finish;
}
-void pa__done(pa_core *c, pa_module*m) {
+void pa__done(pa_module*m) {
struct userdata *u;
- assert(c && m);
+
+ pa_assert(m);
if (!(u = m->userdata))
return;
-
- if (u->source) {
+
+ if (u->source)
pa_source_disconnect(u->source);
- pa_source_unref(u->source);
+
+ if (u->thread) {
+ pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
+ pa_thread_free(u->thread);
}
-
- if (u->pcm_fdl)
- pa_alsa_fdlist_free(u->pcm_fdl);
+
+ pa_thread_mq_done(&u->thread_mq);
+
+ if (u->source)
+ pa_source_unref(u->source);
+
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);
snd_pcm_close(u->pcm_handle);
}
-
- if (u->memchunk.memblock)
- pa_memblock_unref(u->memchunk.memblock);
-
+
+ pa_xfree(u->pollfd);
+ pa_xfree(u->device_name);
pa_xfree(u);
+
+ snd_config_update_free_global();
}