diff options
Diffstat (limited to 'pulse')
-rw-r--r-- | pulse/Makefile.am | 14 | ||||
-rw-r--r-- | pulse/ctl_pulse.c | 722 | ||||
-rw-r--r-- | pulse/pcm_pulse.c | 748 | ||||
-rw-r--r-- | pulse/pulse.c | 260 | ||||
-rw-r--r-- | pulse/pulse.h | 57 |
5 files changed, 1801 insertions, 0 deletions
diff --git a/pulse/Makefile.am b/pulse/Makefile.am new file mode 100644 index 0000000..3da25f0 --- /dev/null +++ b/pulse/Makefile.am @@ -0,0 +1,14 @@ +asound_module_pcm_LTLIBRARIES = libasound_module_pcm_pulse.la +asound_module_ctl_LTLIBRARIES = libasound_module_ctl_pulse.la + +asound_module_pcmdir = $(libdir)/alsa-lib +asound_module_ctldir = $(libdir)/alsa-lib + +AM_CFLAGS = -Wall -g @ALSA_CFLAGS@ $(PTHREAD_CFLAGS) $(pulseaudio_CFLAGS) -D_GNU_SOURCE +AM_LDFLAGS = -module -avoid-version -export-dynamic + +libasound_module_pcm_pulse_la_SOURCES = pcm_pulse.c pulse.c pulse.h +libasound_module_pcm_pulse_la_LIBADD = @ALSA_LIBS@ $(PTHREAD_LIBS) $(pulseaudio_LIBS) + +libasound_module_ctl_pulse_la_SOURCES = ctl_pulse.c pulse.c pulse.h +libasound_module_ctl_pulse_la_LIBADD = @ALSA_LIBS@ $(PTHREAD_LIBS) $(pulseaudio_LIBS) diff --git a/pulse/ctl_pulse.c b/pulse/ctl_pulse.c new file mode 100644 index 0000000..06e087f --- /dev/null +++ b/pulse/ctl_pulse.c @@ -0,0 +1,722 @@ +/* + * ALSA <-> PulseAudio mixer control plugin + * + * Copyright (c) 2006 by Pierre Ossman <ossman@cendio.se> + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This program 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <sys/poll.h> + +#include <alsa/asoundlib.h> +#include <alsa/control_external.h> + +#include "pulse.h" + +typedef struct snd_ctl_pulse { + snd_ctl_ext_t ext; + + snd_pulse_t *p; + + char *source; + char *sink; + + pa_cvolume sink_volume; + pa_cvolume source_volume; + + int sink_muted; + int source_muted; + + int subscribed; + int updated; +} snd_ctl_pulse_t; + +#define SOURCE_VOL_NAME "Capture Volume" +#define SOURCE_MUTE_NAME "Capture Switch" +#define SINK_VOL_NAME "Master Playback Volume" +#define SINK_MUTE_NAME "Master Playback Switch" + +#define UPDATE_SINK_VOL 0x01 +#define UPDATE_SINK_MUTE 0x02 +#define UPDATE_SOURCE_VOL 0x04 +#define UPDATE_SOURCE_MUTE 0x08 + +static void sink_info_cb(pa_context *c, const pa_sink_info *i, int is_last, void *userdata) +{ + snd_ctl_pulse_t *ctl = (snd_ctl_pulse_t*)userdata; + int chan; + + assert(ctl); + + if (is_last) { + pa_threaded_mainloop_signal(ctl->p->mainloop, 0); + return; + } + + assert(i); + + if (!!ctl->sink_muted != !!i->mute) { + ctl->sink_muted = i->mute; + ctl->updated |= UPDATE_SINK_MUTE; + pulse_poll_activate(ctl->p); + } + + if (ctl->sink_volume.channels == i->volume.channels) { + for (chan = 0;chan < ctl->sink_volume.channels;chan++) + if (i->volume.values[chan] != ctl->sink_volume.values[chan]) + break; + + if (chan == ctl->sink_volume.channels) + return; + + ctl->updated |= UPDATE_SINK_VOL; + pulse_poll_activate(ctl->p); + } + + memcpy(&ctl->sink_volume, &i->volume, sizeof(pa_cvolume)); +} + +static void source_info_cb(pa_context *c, const pa_source_info *i, int is_last, void *userdata) +{ + snd_ctl_pulse_t *ctl = (snd_ctl_pulse_t*)userdata; + int chan; + + assert(ctl); + + if (is_last) { + pa_threaded_mainloop_signal(ctl->p->mainloop, 0); + return; + } + + assert(i); + + if (!!ctl->source_muted != !!i->mute) { + ctl->source_muted = i->mute; + ctl->updated |= UPDATE_SOURCE_MUTE; + pulse_poll_activate(ctl->p); + } + + if (ctl->source_volume.channels == i->volume.channels) { + for (chan = 0;chan < ctl->source_volume.channels;chan++) + if (i->volume.values[chan] != ctl->source_volume.values[chan]) + break; + + if (chan == ctl->source_volume.channels) + return; + + ctl->updated |= UPDATE_SOURCE_VOL; + pulse_poll_activate(ctl->p); + } + + memcpy(&ctl->source_volume, &i->volume, sizeof(pa_cvolume)); +} + +static void event_cb(pa_context *c, pa_subscription_event_type_t t, + uint32_t index, void *userdata) +{ + snd_ctl_pulse_t *ctl = (snd_ctl_pulse_t*)userdata; + pa_operation *o; + + assert(ctl && ctl->p && ctl->p->context); + + o = pa_context_get_sink_info_by_name(ctl->p->context, ctl->sink, + sink_info_cb, ctl); + pa_operation_unref(o); + + o = pa_context_get_source_info_by_name(ctl->p->context, ctl->source, + source_info_cb, ctl); + pa_operation_unref(o); +} + +static int pulse_update_volume(snd_ctl_pulse_t *ctl) +{ + int err; + pa_operation *o; + + assert(ctl && ctl->p && ctl->p->context); + + o = pa_context_get_sink_info_by_name(ctl->p->context, ctl->sink, + sink_info_cb, ctl); + err = pulse_wait_operation(ctl->p, o); + pa_operation_unref(o); + if (err < 0) + return err; + + o = pa_context_get_source_info_by_name(ctl->p->context, ctl->source, + source_info_cb, ctl); + err = pulse_wait_operation(ctl->p, o); + pa_operation_unref(o); + if (err < 0) + return err; + + return 0; +} + +static int pulse_elem_count(snd_ctl_ext_t *ext) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int count = 0; + + assert(ctl); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + if (ctl->source) + count += 2; + if (ctl->sink) + count += 2; + + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return count; +} + +static int pulse_elem_list(snd_ctl_ext_t *ext, unsigned int offset, + snd_ctl_elem_id_t *id) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + + assert(ctl); + + snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + if (ctl->source) { + if (offset == 0) + snd_ctl_elem_id_set_name(id, SOURCE_VOL_NAME); + else if (offset == 1) + snd_ctl_elem_id_set_name(id, SOURCE_MUTE_NAME); + } else + offset += 2; + + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + if (offset == 2) + snd_ctl_elem_id_set_name(id, SINK_VOL_NAME); + else if (offset == 3) + snd_ctl_elem_id_set_name(id, SINK_MUTE_NAME); + + return 0; +} + +static snd_ctl_ext_key_t pulse_find_elem(snd_ctl_ext_t *ext, + const snd_ctl_elem_id_t *id) +{ + const char *name; + + name = snd_ctl_elem_id_get_name(id); + + if (strcmp(name, SOURCE_VOL_NAME) == 0) + return 0; + if (strcmp(name, SOURCE_MUTE_NAME) == 0) + return 1; + if (strcmp(name, SINK_VOL_NAME) == 0) + return 2; + if (strcmp(name, SINK_MUTE_NAME) == 0) + return 3; + + return SND_CTL_EXT_KEY_NOT_FOUND; +} + +static int pulse_get_attribute(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, + int *type, unsigned int *acc, unsigned int *count) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int err = 0; + + if (key > 3) + return -EINVAL; + + assert(ctl); + assert(ctl->p); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + err = pulse_check_connection(ctl->p); + if (err < 0) + goto finish; + + err = pulse_update_volume(ctl); + if (err < 0) + goto finish; + + if (key & 1) + *type = SND_CTL_ELEM_TYPE_BOOLEAN; + else + *type = SND_CTL_ELEM_TYPE_INTEGER; + + *acc = SND_CTL_EXT_ACCESS_READWRITE; + + if (key == 0) + *count = ctl->source_volume.channels; + else if (key == 2) + *count = ctl->sink_volume.channels; + else + *count = 1; + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return err; +} + +static int pulse_get_integer_info(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, + long *imin, long *imax, long *istep) +{ + *istep = 1; + *imin = 0; + *imax = PA_VOLUME_NORM; + + return 0; +} + +static int pulse_read_integer(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, + long *value) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int err = 0, i; + pa_cvolume *vol = NULL; + + assert(ctl); + assert(ctl->p); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + err = pulse_check_connection(ctl->p); + if (err < 0) + goto finish; + + err = pulse_update_volume(ctl); + if (err < 0) + goto finish; + + switch (key) { + case 0: + vol = &ctl->source_volume; + break; + case 1: + *value = !ctl->source_muted; + break; + case 2: + vol = &ctl->sink_volume; + break; + case 3: + *value = !ctl->sink_muted; + break; + default: + err = -EINVAL; + goto finish; + } + + if (vol) { + for (i = 0;i < vol->channels;i++) + value[i] = vol->values[i]; + } + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return err; +} + +static int pulse_write_integer(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, + long *value) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int err = 0, i; + pa_operation *o; + pa_cvolume *vol = NULL; + + assert(ctl); + assert(ctl->p && ctl->p->context); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + err = pulse_check_connection(ctl->p); + if (err < 0) + goto finish; + + err = pulse_update_volume(ctl); + if (err < 0) + goto finish; + + switch (key) { + case 0: + vol = &ctl->source_volume; + break; + case 1: + if (!!ctl->source_muted == !*value) + goto finish; + ctl->source_muted = !*value; + break; + case 2: + vol = &ctl->sink_volume; + break; + case 3: + if (!!ctl->sink_muted == !*value) + goto finish; + ctl->sink_muted = !*value; + break; + default: + err = -EINVAL; + goto finish; + } + + if (vol) { + for (i = 0;i < vol->channels;i++) + if (value[i] != vol->values[i]) + break; + + if (i == vol->channels) + goto finish; + + for (i = 0;i < vol->channels;i++) + vol->values[i] = value[i]; + + if (key == 0) + o = pa_context_set_source_volume_by_name(ctl->p->context, + ctl->source, vol, pulse_context_success_cb, ctl->p); + else + o = pa_context_set_sink_volume_by_name(ctl->p->context, + ctl->sink, vol, pulse_context_success_cb, ctl->p); + } else { + if (key == 1) + o = pa_context_set_source_mute_by_name(ctl->p->context, + ctl->source, ctl->source_muted, pulse_context_success_cb, ctl->p); + else + o = pa_context_set_sink_mute_by_name(ctl->p->context, + ctl->sink, ctl->sink_muted, pulse_context_success_cb, ctl->p); + } + + err = pulse_wait_operation(ctl->p, o); + pa_operation_unref(o); + if (err < 0) + goto finish; + + err = 1; + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return err; +} + +static void pulse_subscribe_events(snd_ctl_ext_t *ext, int subscribe) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + + assert(ctl); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + ctl->subscribed = !!(subscribe & SND_CTL_EVENT_MASK_VALUE); + + pa_threaded_mainloop_unlock(ctl->p->mainloop); +} + +static int pulse_read_event(snd_ctl_ext_t *ext, snd_ctl_elem_id_t *id, + unsigned int *event_mask) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int offset; + int err = -EAGAIN; + + assert(ctl); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + if (!ctl->updated || !ctl->subscribed) + goto finish; + + if (ctl->source) + offset = 2; + else + offset = 0; + + if (ctl->updated & UPDATE_SOURCE_VOL) { + pulse_elem_list(ext, 0, id); + ctl->updated &= ~UPDATE_SOURCE_VOL; + } else if (ctl->updated & UPDATE_SOURCE_MUTE) { + pulse_elem_list(ext, 1, id); + ctl->updated &= ~UPDATE_SOURCE_MUTE; + } else if (ctl->updated & UPDATE_SINK_VOL) { + pulse_elem_list(ext, offset + 0, id); + ctl->updated &= ~UPDATE_SINK_VOL; + } else if (ctl->updated & UPDATE_SINK_MUTE) { + pulse_elem_list(ext, offset + 1, id); + ctl->updated &= ~UPDATE_SINK_MUTE; + } + + *event_mask = SND_CTL_EVENT_MASK_VALUE; + + if (!ctl->updated) + pulse_poll_deactivate(ctl->p); + + err = 1; + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return err; +} + +static int pulse_ctl_poll_descriptors_count(snd_ctl_ext_t *ext) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int count; + + assert(ctl); + assert(ctl->p); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + count = pulse_poll_descriptors_count(ctl->p); + + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return count; +} + +static int pulse_ctl_poll_descriptors(snd_ctl_ext_t *ext, struct pollfd *pfd, unsigned int space) +{ + int num; + + snd_ctl_pulse_t *ctl = ext->private_data; + + assert(ctl); + assert(ctl->p); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + num = pulse_poll_descriptors(ctl->p, pfd, space); + if (num < 0) + goto finish; + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return num; +} + +static int pulse_ctl_poll_revents(snd_ctl_ext_t *ext, struct pollfd *pfd, unsigned int nfds, unsigned short *revents) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + int err = 0; + + assert(ctl); + assert(ctl->p); + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + err = pulse_poll_revents(ctl->p, pfd, nfds, revents); + if (err < 0) + goto finish; + + *revents = 0; + + if (ctl->updated) + *revents |= POLLIN; + +finish: + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + return err; +} + +static void pulse_close(snd_ctl_ext_t *ext) +{ + snd_ctl_pulse_t *ctl = ext->private_data; + + assert(ctl); + + if (ctl->p) + pulse_free(ctl->p); + + if (ctl->source) + free(ctl->source); + if (ctl->sink) + free(ctl->sink); + + free(ctl); +} + +static snd_ctl_ext_callback_t pulse_ext_callback = { + .elem_count = pulse_elem_count, + .elem_list = pulse_elem_list, + .find_elem = pulse_find_elem, + .get_attribute = pulse_get_attribute, + .get_integer_info = pulse_get_integer_info, + .read_integer = pulse_read_integer, + .write_integer = pulse_write_integer, + .subscribe_events = pulse_subscribe_events, + .read_event = pulse_read_event, + .poll_descriptors_count = pulse_ctl_poll_descriptors_count, + .poll_descriptors = pulse_ctl_poll_descriptors, + .poll_revents = pulse_ctl_poll_revents, + .close = pulse_close, +}; + +static void server_info_cb(pa_context *c, const pa_server_info*i, void *userdata) +{ + snd_ctl_pulse_t *ctl = (snd_ctl_pulse_t*)userdata; + + assert(ctl && i); + + if (i->default_source_name && !ctl->source) + ctl->source = strdup(i->default_source_name); + if (i->default_sink_name && !ctl->sink) + ctl->sink = strdup(i->default_sink_name); + + pa_threaded_mainloop_signal(ctl->p->mainloop, 0); +} + +SND_CTL_PLUGIN_DEFINE_FUNC(pulse) +{ + snd_config_iterator_t i, next; + const char *server = NULL; + const char *device = NULL; + const char *source = NULL; + const char *sink = NULL; + int err; + snd_ctl_pulse_t *ctl; + pa_operation *o; + + snd_config_for_each(i, next, conf) { + snd_config_t *n = snd_config_iterator_entry(i); + const char *id; + if (snd_config_get_id(n, &id) < 0) + continue; + if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0) + continue; + if (strcmp(id, "server") == 0) { + if (snd_config_get_string(n, &server) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + if (strcmp(id, "device") == 0) { + if (snd_config_get_string(n, &device) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + if (strcmp(id, "source") == 0) { + if (snd_config_get_string(n, &source) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + if (strcmp(id, "sink") == 0) { + if (snd_config_get_string(n, &sink) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + SNDERR("Unknown field %s", id); + return -EINVAL; + } + + ctl = calloc(1, sizeof(*ctl)); + + ctl->p = pulse_new(); + if (!ctl->p) { + err = -EIO; + goto error; + } + + err = pulse_connect(ctl->p, server); + if (err < 0) + goto error; + + if (source) + ctl->source = strdup(source); + else if (device) + ctl->source = strdup(device); + + if (sink) + ctl->sink = strdup(sink); + else if (device) + ctl->sink = strdup(device); + + if (!ctl->source || !ctl->sink) { + pa_threaded_mainloop_lock(ctl->p->mainloop); + + o = pa_context_get_server_info(ctl->p->context, server_info_cb, ctl); + err = pulse_wait_operation(ctl->p, o); + + pa_operation_unref(o); + + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + if (err < 0) + goto error; + } + + pa_threaded_mainloop_lock(ctl->p->mainloop); + + pa_context_set_subscribe_callback(ctl->p->context, event_cb, ctl); + + o = pa_context_subscribe(ctl->p->context, + PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, + pulse_context_success_cb, ctl->p); + + err = pulse_wait_operation(ctl->p, o); + + pa_operation_unref(o); + + pa_threaded_mainloop_unlock(ctl->p->mainloop); + + if (err < 0) + goto error; + + ctl->ext.version = SND_CTL_EXT_VERSION; + ctl->ext.card_idx = 0; + strncpy(ctl->ext.id, "pulse", sizeof(ctl->ext.id) - 1); + strncpy(ctl->ext.driver, "Polypaudio plugin", sizeof(ctl->ext.driver) - 1); + strncpy(ctl->ext.name, "Polypaudio", sizeof(ctl->ext.name) - 1); + strncpy(ctl->ext.longname, "Polypaudio", sizeof(ctl->ext.longname) - 1); + strncpy(ctl->ext.mixername, "Polypaudio", sizeof(ctl->ext.mixername) - 1); + ctl->ext.poll_fd = -1; + ctl->ext.callback = &pulse_ext_callback; + ctl->ext.private_data = ctl; + + err = snd_ctl_ext_create(&ctl->ext, name, mode); + if (err < 0) + goto error; + + *handlep = ctl->ext.handle; + + return 0; + +error: + if (ctl->source) + free(ctl->source); + if (ctl->sink) + free(ctl->sink); + + if (ctl->p) + pulse_free(ctl->p); + + free(ctl); + + return err; +} + +SND_CTL_PLUGIN_SYMBOL(pulse); diff --git a/pulse/pcm_pulse.c b/pulse/pcm_pulse.c new file mode 100644 index 0000000..3f5247e --- /dev/null +++ b/pulse/pcm_pulse.c @@ -0,0 +1,748 @@ +/* + * ALSA <-> PulseAudio PCM I/O plugin + * + * Copyright (c) 2006 by Pierre Ossman <ossman@cendio.se> + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This program 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <stdio.h> +#include <sys/poll.h> + +#include <alsa/asoundlib.h> +#include <alsa/pcm_external.h> + +#include "pulse.h" + +typedef struct snd_pcm_pulse { + snd_pcm_ioplug_t io; + + snd_pulse_t *p; + + char *device; + + /* Since ALSA expects a ring buffer we must do some voodoo. */ + size_t last_size; + size_t ptr; + + size_t offset; + + pa_stream *stream; + + pa_sample_spec ss; + unsigned int frame_size; + pa_buffer_attr buffer_attr; +} snd_pcm_pulse_t; + +static void update_ptr(snd_pcm_pulse_t *pcm) +{ + size_t size; + + if (pcm->io.stream == SND_PCM_STREAM_PLAYBACK) + size = pa_stream_writable_size(pcm->stream); + else + size = pa_stream_readable_size(pcm->stream) - pcm->offset; + + if (size > pcm->last_size) { + pcm->ptr += size - pcm->last_size; + pcm->ptr %= pcm->buffer_attr.maxlength; + } + + pcm->last_size = size; +} + +static int pulse_start(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + pa_operation *o; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + o = pa_stream_cork(pcm->stream, 0, pulse_stream_success_cb, pcm->p); + assert(o); + + err = pulse_wait_operation(pcm->p, o); + + pa_operation_unref(o); + + if (err < 0) { + err = -EIO; + goto finish; + } + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_stop(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + pa_operation *o; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + o = pa_stream_flush(pcm->stream, pulse_stream_success_cb, pcm->p); + assert(o); + + err = pulse_wait_operation(pcm->p, o); + + pa_operation_unref(o); + + if (err < 0) { + err = -EIO; + goto finish; + } + + o = pa_stream_cork(pcm->stream, 1, pulse_stream_success_cb, pcm->p); + assert(o); + + err = pulse_wait_operation(pcm->p, o); + + pa_operation_unref(o); + + if (err < 0) { + err = -EIO; + goto finish; + } + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +int pulse_drain(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + pa_operation *o; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + o = pa_stream_drain(pcm->stream, pulse_stream_success_cb, pcm->p); + assert(o); + + err = pulse_wait_operation(pcm->p, o); + + pa_operation_unref(o); + + if (err < 0) { + err = -EIO; + goto finish; + } + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static snd_pcm_sframes_t pulse_pointer(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + update_ptr(pcm); + + err = snd_pcm_bytes_to_frames(io->pcm, pcm->ptr); + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_delay(snd_pcm_ioplug_t *io, + snd_pcm_sframes_t *delayp) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int err = 0; + pa_usec_t lat; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + if (pa_stream_get_latency(pcm->stream, &lat, NULL)) { + err = -EIO; + goto finish; + } + + *delayp = snd_pcm_bytes_to_frames(io->pcm, pa_usec_to_bytes(lat, &pcm->ss)); + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static snd_pcm_sframes_t pulse_write(snd_pcm_ioplug_t *io, + const snd_pcm_channel_area_t *areas, + snd_pcm_uframes_t offset, + snd_pcm_uframes_t size) +{ + snd_pcm_pulse_t *pcm = io->private_data; + const char *buf; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + /* Make sure the buffer pointer is in sync */ + update_ptr(pcm); + + assert(pcm->last_size >= (size * pcm->frame_size)); + + buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; + + pa_stream_write(pcm->stream, buf, size * pcm->frame_size, NULL, 0, 0); + + /* Make sure the buffer pointer is in sync */ + update_ptr(pcm); + + if (pcm->last_size < pcm->buffer_attr.minreq) + pulse_poll_deactivate(pcm->p); + + err = size; + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static snd_pcm_sframes_t pulse_read(snd_pcm_ioplug_t *io, + const snd_pcm_channel_area_t *areas, + snd_pcm_uframes_t offset, + snd_pcm_uframes_t size) +{ + snd_pcm_pulse_t *pcm = io->private_data; + void *dst_buf, *src_buf; + size_t remain_size, frag_length; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(pcm->stream); + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + /* Make sure the buffer pointer is in sync */ + update_ptr(pcm); + + remain_size = size * pcm->frame_size; + + dst_buf = (char *)areas->addr + (areas->first + areas->step * offset) / 8; + while (remain_size > 0) { + pa_stream_peek(pcm->stream, (const void**)&src_buf, &frag_length); + if (frag_length == 0) + break; + + src_buf = (char*)src_buf + pcm->offset; + frag_length -= pcm->offset; + + if (frag_length > remain_size) { + pcm->offset += remain_size; + frag_length = remain_size; + } else + pcm->offset = 0; + + memcpy(dst_buf, src_buf, frag_length); + + if (pcm->offset == 0) + pa_stream_drop(pcm->stream); + + dst_buf = (char*)dst_buf + frag_length; + remain_size -= frag_length; + } + + /* Make sure the buffer pointer is in sync */ + update_ptr(pcm); + + if (pcm->last_size < pcm->buffer_attr.minreq) + pulse_poll_deactivate(pcm->p); + + err = size - (remain_size / pcm->frame_size); + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static void stream_request_cb(pa_stream *p, size_t length, void *userdata) +{ + snd_pcm_pulse_t *pcm = userdata; + + assert(pcm); + assert(pcm->p); + + pulse_poll_activate(pcm->p); +} + +static int pulse_pcm_poll_descriptors_count(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int count; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + count = pulse_poll_descriptors_count(pcm->p); + + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return count; +} + +static int pulse_pcm_poll_descriptors(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int space) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int err; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + err = pulse_poll_descriptors(pcm->p, pfd, space); + + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_pcm_poll_revents(snd_pcm_ioplug_t *io, struct pollfd *pfd, unsigned int nfds, unsigned short *revents) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + err = pulse_poll_revents(pcm->p, pfd, nfds, revents); + if (err < 0) + goto finish; + + *revents = 0; + + /* + * Make sure we have an up-to-date value. + */ + update_ptr(pcm); + + /* + * ALSA thinks in periods, not bytes, samples or frames. + */ + if (pcm->last_size >= pcm->buffer_attr.minreq) { + if (io->stream == SND_PCM_STREAM_PLAYBACK) + *revents |= POLLOUT; + else + *revents |= POLLIN; + } + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_prepare(snd_pcm_ioplug_t *io) +{ + pa_channel_map map; + snd_pcm_pulse_t *pcm = io->private_data; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + if (pcm->stream) { + pa_stream_disconnect(pcm->stream); + pulse_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_TERMINATED); + pa_stream_unref(pcm->stream); + pcm->stream = NULL; + } + + err = pulse_check_connection(pcm->p); + if (err < 0) + goto finish; + + assert(pcm->stream == NULL); + + if (io->stream == SND_PCM_STREAM_PLAYBACK) + pcm->stream = pa_stream_new(pcm->p->context, "ALSA Playback", &pcm->ss, + pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA)); + else + pcm->stream = pa_stream_new(pcm->p->context, "ALSA Capture", &pcm->ss, + pa_channel_map_init_auto(&map, pcm->ss.channels, PA_CHANNEL_MAP_ALSA)); + assert(pcm->stream); + + pa_stream_set_state_callback(pcm->stream, pulse_stream_state_cb, pcm->p); + + if (io->stream == SND_PCM_STREAM_PLAYBACK) { + pa_stream_set_write_callback(pcm->stream, stream_request_cb, pcm); + pa_stream_connect_playback(pcm->stream, pcm->device, &pcm->buffer_attr, + PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING, NULL, NULL); + } else { + pa_stream_set_read_callback(pcm->stream, stream_request_cb, pcm); + pa_stream_connect_record(pcm->stream, pcm->device, &pcm->buffer_attr, + PA_STREAM_AUTO_TIMING_UPDATE | PA_STREAM_INTERPOLATE_TIMING); + } + + err = pulse_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_READY); + if (err < 0) { + fprintf(stderr, "*** POLYPAUDIO: Unable to create stream.\n"); + pa_stream_unref(pcm->stream); + pcm->stream = NULL; + goto finish; + } + + pcm->last_size = 0; + pcm->ptr = 0; + pcm->offset = 0; + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_hw_params(snd_pcm_ioplug_t *io, snd_pcm_hw_params_t *params) +{ + snd_pcm_pulse_t *pcm = io->private_data; + int err = 0; + + assert(pcm); + assert(pcm->p); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + assert(!pcm->stream); + + pcm->frame_size = (snd_pcm_format_physical_width(io->format) * io->channels) / 8; + + switch (io->format) { + case SND_PCM_FORMAT_U8: + pcm->ss.format = PA_SAMPLE_U8; + break; + case SND_PCM_FORMAT_A_LAW: + pcm->ss.format = PA_SAMPLE_ALAW; + break; + case SND_PCM_FORMAT_MU_LAW: + pcm->ss.format = PA_SAMPLE_ULAW; + break; + case SND_PCM_FORMAT_S16_LE: + pcm->ss.format = PA_SAMPLE_S16LE; + break; + case SND_PCM_FORMAT_S16_BE: + pcm->ss.format = PA_SAMPLE_S16BE; + break; + case SND_PCM_FORMAT_FLOAT_LE: + pcm->ss.format = PA_SAMPLE_FLOAT32LE; + break; + case SND_PCM_FORMAT_FLOAT_BE: + pcm->ss.format = PA_SAMPLE_FLOAT32BE; + break; + default: + fprintf(stderr, "*** POLYPAUDIO: unsupported format %s\n", + snd_pcm_format_name(io->format)); + err = -EINVAL; + goto finish; + } + + pcm->ss.rate = io->rate; + pcm->ss.channels = io->channels; + + pcm->buffer_attr.maxlength = io->buffer_size * pcm->frame_size; + pcm->buffer_attr.tlength = io->buffer_size * pcm->frame_size; + pcm->buffer_attr.prebuf = io->period_size * pcm->frame_size; + pcm->buffer_attr.minreq = io->period_size * pcm->frame_size; + pcm->buffer_attr.fragsize = io->period_size * pcm->frame_size; + +finish: + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + return err; +} + +static int pulse_close(snd_pcm_ioplug_t *io) +{ + snd_pcm_pulse_t *pcm = io->private_data; + + assert(pcm); + + pa_threaded_mainloop_lock(pcm->p->mainloop); + + if (pcm->stream) { + pa_stream_disconnect(pcm->stream); + pulse_wait_stream_state(pcm->p, pcm->stream, PA_STREAM_TERMINATED); + pa_stream_unref(pcm->stream); + } + + pa_threaded_mainloop_unlock(pcm->p->mainloop); + + if (pcm->p) + pulse_free(pcm->p); + + if (pcm->device) + free(pcm->device); + + free(pcm); + + return 0; +} + +static snd_pcm_ioplug_callback_t pulse_playback_callback = { + .start = pulse_start, + .stop = pulse_stop, + .drain = pulse_drain, + .pointer = pulse_pointer, + .transfer = pulse_write, + .delay = pulse_delay, + .poll_descriptors_count = pulse_pcm_poll_descriptors_count, + .poll_descriptors = pulse_pcm_poll_descriptors, + .poll_revents = pulse_pcm_poll_revents, + .prepare = pulse_prepare, + .hw_params = pulse_hw_params, + .close = pulse_close, +}; + + +static snd_pcm_ioplug_callback_t pulse_capture_callback = { + .start = pulse_start, + .stop = pulse_stop, + .pointer = pulse_pointer, + .transfer = pulse_read, + .delay = pulse_delay, + .poll_descriptors_count = pulse_pcm_poll_descriptors_count, + .poll_descriptors = pulse_pcm_poll_descriptors, + .poll_revents = pulse_pcm_poll_revents, + .prepare = pulse_prepare, + .hw_params = pulse_hw_params, + .close = pulse_close, +}; + + +static int pulse_hw_constraint(snd_pcm_pulse_t *pcm) +{ + snd_pcm_ioplug_t *io = &pcm->io; + + static const snd_pcm_access_t access_list[] = { + SND_PCM_ACCESS_RW_INTERLEAVED + }; + static const unsigned int formats[] = { + SND_PCM_FORMAT_U8, + SND_PCM_FORMAT_A_LAW, + SND_PCM_FORMAT_MU_LAW, + SND_PCM_FORMAT_S16_LE, + SND_PCM_FORMAT_S16_BE, + SND_PCM_FORMAT_FLOAT_LE, + SND_PCM_FORMAT_FLOAT_BE + }; + + int err; + + err = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_ACCESS, + ARRAY_SIZE(access_list), access_list); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_list(io, SND_PCM_IOPLUG_HW_FORMAT, + ARRAY_SIZE(formats), formats); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_CHANNELS, + 1, PA_CHANNELS_MAX); + if (err < 0) + return err; + + /* FIXME: Investigate actual min and max */ + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE, + 8000, 48000); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_RATE, + 8000, 48000); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIOD_BYTES, + 1, 4294967295U); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_PERIODS, + 2, 4294967295U); + if (err < 0) + return err; + + err = snd_pcm_ioplug_set_param_minmax(io, SND_PCM_IOPLUG_HW_BUFFER_BYTES, + 1, 4294967295U); + if (err < 0) + return err; + + return 0; +} + +SND_PCM_PLUGIN_DEFINE_FUNC(pulse) +{ + snd_config_iterator_t i, next; + const char *server = NULL; + const char *device = NULL; + int err; + snd_pcm_pulse_t *pcm; + + snd_config_for_each(i, next, conf) { + snd_config_t *n = snd_config_iterator_entry(i); + const char *id; + if (snd_config_get_id(n, &id) < 0) + continue; + if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0) + continue; + if (strcmp(id, "server") == 0) { + if (snd_config_get_string(n, &server) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + if (strcmp(id, "device") == 0) { + if (snd_config_get_string(n, &device) < 0) { + SNDERR("Invalid type for %s", id); + return -EINVAL; + } + continue; + } + SNDERR("Unknown field %s", id); + return -EINVAL; + } + + pcm = calloc(1, sizeof(*pcm)); + + if (device) + pcm->device = strdup(device); + + pcm->p = pulse_new(); + if (!pcm->p) { + err = -EIO; + goto error; + } + + err = pulse_connect(pcm->p, server); + if (err < 0) + goto error; + + pcm->io.version = SND_PCM_IOPLUG_VERSION; + pcm->io.name = "ALSA <-> Polypaudio PCM I/O Plugin"; + pcm->io.poll_fd = -1; + pcm->io.poll_events = 0; + pcm->io.mmap_rw = 0; + pcm->io.callback = stream == SND_PCM_STREAM_PLAYBACK ? + &pulse_playback_callback : &pulse_capture_callback; + pcm->io.private_data = pcm; + + err = snd_pcm_ioplug_create(&pcm->io, name, stream, mode); + if (err < 0) + goto error; + + err = pulse_hw_constraint(pcm); + if (err < 0) { + snd_pcm_ioplug_delete(&pcm->io); + goto error; + } + + *pcmp = pcm->io.pcm; + return 0; + +error: + if (pcm->p) + pulse_free(pcm->p); + + free(pcm); + + return err; +} + +SND_PCM_PLUGIN_SYMBOL(pulse); diff --git a/pulse/pulse.c b/pulse/pulse.c new file mode 100644 index 0000000..fd80d9c --- /dev/null +++ b/pulse/pulse.c @@ -0,0 +1,260 @@ +/* + * ALSA <-> PulseAudio plugins + * + * Copyright (c) 2006 by Pierre Ossman <ossman@cendio.se> + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This program 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <stdio.h> +#include <unistd.h> +#include <signal.h> +#include <sys/poll.h> + +#include "pulse.h" + +int pulse_check_connection(snd_pulse_t *p) +{ + pa_context_state_t state; + + assert(p && p->context && p->mainloop); + + state = pa_context_get_state(p->context); + + if (state != PA_CONTEXT_READY) + return -EIO; + + return 0; +} + +void pulse_stream_state_cb(pa_stream *s, void * userdata) +{ + snd_pulse_t *p = userdata; + + assert(s); + assert(p); + + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +void pulse_stream_success_cb(pa_stream *s, int success, void *userdata) +{ + snd_pulse_t *p = userdata; + + assert(s); + assert(p); + + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +void pulse_context_success_cb(pa_context *c, int success, void *userdata) +{ + snd_pulse_t *p = userdata; + + assert(c); + assert(p); + + pa_threaded_mainloop_signal(p->mainloop, 0); +} + +int pulse_wait_operation(snd_pulse_t *p, pa_operation *o) +{ + assert(p && o && (p->state == PULSE_STATE_READY) && p->mainloop); + + while (pa_operation_get_state(o) == PA_OPERATION_RUNNING) + pa_threaded_mainloop_wait(p->mainloop); + + return 0; +} + +int pulse_wait_stream_state(snd_pulse_t *p, pa_stream *stream, pa_stream_state_t target) +{ + pa_stream_state_t state; + + assert(p && stream && (p->state == PULSE_STATE_READY) && p->mainloop); + + while (1) { + state = pa_stream_get_state(stream); + + if (state == PA_STREAM_FAILED) + return -EIO; + + if (state == target) + break; + + pa_threaded_mainloop_wait(p->mainloop); + } + + return 0; +} + +static void context_state_cb(pa_context *c, void *userdata) { + snd_pulse_t *p = userdata; + assert(c); + + switch (pa_context_get_state(c)) { + case PA_CONTEXT_READY: + case PA_CONTEXT_TERMINATED: + case PA_CONTEXT_FAILED: + pa_threaded_mainloop_signal(p->mainloop, 0); + break; + + case PA_CONTEXT_UNCONNECTED: + case PA_CONTEXT_CONNECTING: + case PA_CONTEXT_AUTHORIZING: + case PA_CONTEXT_SETTING_NAME: + break; + } +} + +snd_pulse_t *pulse_new() +{ + snd_pulse_t *p; + int fd[2] = { -1, -1 }; + char proc[PATH_MAX], buf[PATH_MAX + 20]; + + p = calloc(1, sizeof(snd_pulse_t)); + assert(p); + + p->state = PULSE_STATE_INIT; + + if (pipe(fd)) { + free(p); + return NULL; + } + + p->main_fd = fd[0]; + p->thread_fd = fd[1]; + + fcntl(fd[0], F_SETFL, O_NONBLOCK); + fcntl(fd[1], F_SETFL, O_NONBLOCK); + + signal(SIGPIPE, SIG_IGN); /* Yes, ugly as hell */ + + p->mainloop = pa_threaded_mainloop_new(); + assert(p->mainloop); + + if (pa_threaded_mainloop_start(p->mainloop) < 0) { + pa_threaded_mainloop_free(p->mainloop); + close(fd[0]); + close(fd[1]); + free(p); + return NULL; + } + + if (pa_get_binary_name(proc, sizeof(proc))) + snprintf(buf, sizeof(buf), "ALSA plug-in [%s]", pa_path_get_filename(proc)); + else + snprintf(buf, sizeof(buf), "ALSA plug-in"); + + p->context = pa_context_new(pa_threaded_mainloop_get_api(p->mainloop), buf); + assert(p->context); + + return p; +} + +void pulse_free(snd_pulse_t *p) +{ + pa_threaded_mainloop_stop(p->mainloop); + + pa_context_unref(p->context); + pa_threaded_mainloop_free(p->mainloop); + + close(p->thread_fd); + close(p->main_fd); + + free(p); +} + +int pulse_connect(snd_pulse_t *p, const char *server) +{ + int err; + + assert(p && p->context && p->mainloop && (p->state == PULSE_STATE_INIT)); + + pa_threaded_mainloop_lock(p->mainloop); + + err = pa_context_connect(p->context, server, 0, NULL); + if (err < 0) + goto error; + + pa_context_set_state_callback(p->context, context_state_cb, p); + + pa_threaded_mainloop_wait(p->mainloop); + + if (pa_context_get_state(p->context) != PA_CONTEXT_READY) + goto error; + + pa_threaded_mainloop_unlock(p->mainloop); + + p->state = PULSE_STATE_READY; + + return 0; + +error: + fprintf(stderr, "*** PULSEAUDIO: Unable to connect: %s\n", + pa_strerror(pa_context_errno(p->context))); + + pa_threaded_mainloop_unlock(p->mainloop); + + return -ECONNREFUSED; +} + +void pulse_poll_activate(snd_pulse_t *p) +{ + assert(p); + + write(p->thread_fd, "a", 1); +} + +void pulse_poll_deactivate(snd_pulse_t *p) +{ + char buf[10]; + + assert(p); + + /* Drain the pipe */ + while (read(p->main_fd, buf, sizeof(buf)) > 0); +} + +int pulse_poll_descriptors_count(snd_pulse_t *p) +{ + assert(p); + + if (p->main_fd >= 0) + return 1; + else + return 0; +} + +int pulse_poll_descriptors(snd_pulse_t *p, struct pollfd *pfd, unsigned int space) +{ + assert(p); + + assert(space >= 1); + + pfd[0].fd = p->main_fd; + pfd[0].events = POLLIN; + pfd[0].revents = 0; + + return 1; +} + +int pulse_poll_revents(snd_pulse_t *p, struct pollfd *pfd, unsigned int nfds, unsigned short *revents) +{ + assert(p); + + return 1; +} diff --git a/pulse/pulse.h b/pulse/pulse.h new file mode 100644 index 0000000..ab53bcb --- /dev/null +++ b/pulse/pulse.h @@ -0,0 +1,57 @@ +/* + * ALSA <-> PulseAudio plugins + * + * Copyright (c) 2006 by Pierre Ossman <ossman@cendio.se> + * + * This library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * This program 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <alsa/asoundlib.h> + +#include <pulse/pulseaudio.h> + +#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0])) + +typedef struct snd_pulse { + pa_threaded_mainloop *mainloop; + pa_context *context; + + int thread_fd, main_fd; + + enum { + PULSE_STATE_INIT, + PULSE_STATE_READY, + } state; +} snd_pulse_t; + +int pulse_check_connection(snd_pulse_t *p); + +void pulse_stream_state_cb(pa_stream *s, void * userdata); +void pulse_stream_success_cb(pa_stream *s, int success, void *userdata); +void pulse_context_success_cb(pa_context *c, int success, void *userdata); + +int pulse_wait_operation(snd_pulse_t *p, pa_operation *o); +int pulse_wait_stream_state(snd_pulse_t *p, pa_stream *stream, pa_stream_state_t target); + +snd_pulse_t *pulse_new(); +void pulse_free(snd_pulse_t *p); + +int pulse_connect(snd_pulse_t *p, const char *server); + +void pulse_poll_activate(snd_pulse_t *p); +void pulse_poll_deactivate(snd_pulse_t *p); +int pulse_poll_descriptors_count(snd_pulse_t *p); +int pulse_poll_descriptors(snd_pulse_t *p, struct pollfd *pfd, unsigned int space); +int pulse_poll_revents(snd_pulse_t *p, struct pollfd *pfd, unsigned int nfds, unsigned short *revents); |