diff options
Diffstat (limited to 'src/modules/module-alsa-source.c')
| -rw-r--r-- | src/modules/module-alsa-source.c | 968 |
1 files changed, 968 insertions, 0 deletions
diff --git a/src/modules/module-alsa-source.c b/src/modules/module-alsa-source.c new file mode 100644 index 00000000..23a2f921 --- /dev/null +++ b/src/modules/module-alsa-source.c @@ -0,0 +1,968 @@ +/* $Id$ */ + +/*** + 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. + + 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/xmalloc.h> +#include <pulse/util.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 <pulsecore/rtpoll.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_LOAD_ONCE(FALSE); +PA_MODULE_USAGE( + "source_name=<name for the source> " + "device=<ALSA device> " + "device_id=<ALSA device id> " + "format=<sample format> " + "channels=<number of channels> " + "rate=<sample rate> " + "fragments=<number of fragments> " + "fragment_size=<fragment size> " + "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; + pa_rtpoll *rtpoll; + + snd_pcm_t *pcm_handle; + + pa_alsa_fdlist *mixer_fdl; + snd_mixer_t *mixer_handle; + snd_mixer_elem_t *mixer_elem; + long hw_volume_max, hw_volume_min; + + size_t frame_size, fragment_size, hwbuf_size; + unsigned nfragments; + + char *device_name; + + pa_bool_t use_mmap; + + pa_rtpoll_item *alsa_rtpoll_item; + + snd_mixer_selem_channel_id_t mixer_map[SND_MIXER_SCHN_LAST]; +}; + +static const char* const valid_modargs[] = { + "device", + "device_id", + "source_name", + "channels", + "rate", + "format", + "fragments", + "fragment_size", + "channel_map", + "mmap", + NULL +}; + +static int mmap_read(struct userdata *u) { + int work_done = 0; + + pa_assert(u); + pa_source_assert_ref(u->source); + + for (;;) { + snd_pcm_sframes_t n; + int err; + 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) { + + if (n == -EPIPE) + pa_log_debug("snd_pcm_avail_update: Buffer underrun!"); + + if ((err = snd_pcm_recover(u->pcm_handle, n, 1)) == 0) + continue; + + if (err == -EAGAIN) + return work_done; + + pa_log("snd_pcm_avail_update: %s", snd_strerror(err)); + return -1; + } + +/* pa_log("Got request for %i samples", (int) n); */ + + if (n <= 0) + return work_done; + + frames = n; + + if ((err = snd_pcm_mmap_begin(u->pcm_handle, &areas, &offset, &frames)) < 0) { + + if (err == -EPIPE) + pa_log_debug("snd_pcm_mmap_begin: 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; + } + + /* 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, 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; + } + + work_done = 1; + +/* pa_log("wrote %i samples", (int) frames); */ + } +} + +static int unix_read(struct userdata *u) { + snd_pcm_status_t *status; + int work_done = 0; + + snd_pcm_status_alloca(&status); + + pa_assert(u); + pa_source_assert_ref(u->source); + + for (;;) { + void *p; + snd_pcm_sframes_t t, k; + ssize_t l; + int err; + 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; + } + + 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) + return work_done; + + chunk.memblock = pa_memblock_new(u->core->mempool, (size_t) -1); + + k = pa_memblock_get_length(chunk.memblock); + + if (k > l) + k = l; + + k = (k/u->frame_size)*u->frame_size; + + p = pa_memblock_acquire(chunk.memblock); + t = snd_pcm_readi(u->pcm_handle, (uint8_t*) p, k / 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"); + return work_done; + } else { + pa_log("Failed to read data from DSP: %s", snd_strerror(t)); + return -1; + } + } + + 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) + 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; + int err; + + snd_pcm_status_alloca(&status); + + 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); + + if (frames > 0) + r = pa_bytes_to_usec(frames * u->frame_size, &u->source->sample_spec); + + 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)); + 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; + + 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 unsuspend(struct userdata *u) { + pa_sample_spec ss; + int err; + pa_bool_t b; + unsigned nfrags; + snd_pcm_uframes_t period_size; + + pa_assert(u); + pa_assert(!u->pcm_handle); + + pa_log_info("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, TRUE)) < 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_info("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; + + return 0; + } + + 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_INIT) { + if (build_pollfd(u) < 0) + return -1; + + snd_pcm_start(u->pcm_handle); + } + + if (u->source->thread_info.state == PA_SOURCE_SUSPENDED) { + if (unsuspend(u) < 0) + return -1; + } + + break; + + case PA_SOURCE_UNLINKED: + case PA_SOURCE_INIT: + ; + } + + 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 (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 0; +} + +static int source_get_volume_cb(pa_source *s) { + struct userdata *u = s->userdata; + int err; + int i; + + pa_assert(u); + pa_assert(u->mixer_elem); + + for (i = 0; i < s->sample_spec.channels; i++) { + long set_vol, vol; + + 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, u->mixer_map[i], &vol)) < 0) + goto fail; + + 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("Unable to read volume: %s", snd_strerror(err)); + + s->get_volume = NULL; + s->set_volume = NULL; + return -1; +} + +static int source_set_volume_cb(pa_source *s) { + struct userdata *u = s->userdata; + int err; + int i; + + pa_assert(u); + pa_assert(u->mixer_elem); + + for (i = 0; i < s->sample_spec.channels; i++) { + long alsa_vol; + pa_volume_t vol; + + pa_assert(snd_mixer_selem_has_capture_channel(u->mixer_elem, u->mixer_map[i])); + + vol = s->volume.values[i]; + + if (vol > PA_VOLUME_NORM) + vol = PA_VOLUME_NORM; + + 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, u->mixer_map[i], alsa_vol)) < 0) + goto fail; + } + + return 0; + +fail: + 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_mute_cb(pa_source *s) { + struct userdata *u = s->userdata; + int err, sw; + + 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)); + + s->get_mute = NULL; + s->set_mute = NULL; + return -1; + } + + s->muted = !sw; + + return 0; +} + +static int source_set_mute_cb(pa_source *s) { + struct userdata *u = s->userdata; + int err; + + pa_assert(u); + pa_assert(u->mixer_elem); + + 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 thread_func(void *userdata) { + struct userdata *u = userdata; + + 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); + pa_rtpoll_install(u->rtpoll); + + for (;;) { + int ret; + + /* Read some data and pass it to the sources */ + if (PA_SOURCE_OPENED(u->source->thread_info.state)) { + + if (u->use_mmap) { + if (mmap_read(u) < 0) + goto fail; + + } else { + if (unix_read(u) < 0) + goto fail; + } + } + + /* Hmm, nothing to do. Let's sleep */ + if ((ret = pa_rtpoll_run(u->rtpoll, 1)) < 0) + goto fail; + + if (ret == 0) + goto finish; + + /* Tell ALSA about this and process its response */ + if (PA_SOURCE_OPENED(u->source->thread_info.state)) { + struct pollfd *pollfd; + unsigned short revents = 0; + 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", 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"); + + /* 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; + } + } + } + } + +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"); +} + +int pa__init(pa_module*m) { + + pa_modargs *ma = NULL; + struct userdata *u = NULL; + const char *dev_id; + pa_sample_spec ss; + pa_channel_map map; + uint32_t 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; + pa_bool_t use_mmap = TRUE, b; + + snd_pcm_info_alloca(&pcm_info); + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + 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("Failed to parse sample specification"); + 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); + 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; + } + + 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->rtpoll = pa_rtpoll_new(); + u->alsa_rtpoll_item = NULL; + pa_rtpoll_item_new_asyncmsgq(u->rtpoll, PA_RTPOLL_EARLY, u->thread_mq.inq); + + snd_config_update_free_global(); + + b = use_mmap; + + if ((dev_id = pa_modargs_get_value(ma, "device_id", NULL))) { + + if (!(u->pcm_handle = pa_alsa_open_by_device_id( + dev_id, + &u->device_name, + &ss, &map, + SND_PCM_STREAM_CAPTURE, + &nfrags, &period_size, + &b))) + 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, + &nfrags, &period_size, + &b))) + goto fail; + } + + 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; + } + + if (u->use_mmap) + pa_log_info("Successfully enabled mmap() 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 ((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 { + char *md = pa_sprintf_malloc("hw:%s", dev_id); + + 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 (!found) { + snd_mixer_close(u->mixer_handle); + u->mixer_handle = NULL; + } + } + + if ((name = pa_modargs_get_value(ma, "source_name", NULL))) + namereg_fail = 1; + else { + name = name_buf = pa_sprintf_malloc("alsa_input.%s", u->device_name); + 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; + + 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", + u->device_name, + snd_pcm_info_get_name(pcm_info), + use_mmap ? " via DMA" : "")); + pa_xfree(t); + + u->source->flags = PA_SOURCE_HARDWARE|PA_SOURCE_LATENCY; + + 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) { + pa_assert(u->mixer_elem); + + 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) { + 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); + u->source->flags |= PA_SOURCE_HW_VOLUME_CTRL; + } + + 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_VOLUME_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 initialize 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); + } else + u->mixer_fdl = NULL; + + 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); + + pa_source_put(u->source); + + pa_modargs_free(ma); + + return 0; + +fail: + + if (ma) + pa_modargs_free(ma); + + pa__done(m); + + return -1; +} + +void pa__done(pa_module*m) { + struct userdata *u; + + pa_assert(m); + + if (!(u = m->userdata)) + return; + + 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->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); + } + + pa_xfree(u->device_name); + pa_xfree(u); + + snd_config_update_free_global(); +} |