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pipewire/pipewire-alsa/alsa-plugins/ctl_pipewire.c

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/* CTL - PipeWire plugin
*
* Copyright © 2020 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <alsa/asoundlib.h>
#include <alsa/control_external.h>
#include <spa/utils/result.h>
#include <spa/utils/string.h>
#include <spa/utils/json.h>
#include <spa/param/props.h>
#include <spa/param/audio/format-utils.h>
#include <pipewire/pipewire.h>
#include <pipewire/extensions/metadata.h>
#define NAME "alsa-plugin"
#define VOLUME_MAX 65536
struct volume {
uint32_t channels;
long values[SPA_AUDIO_MAX_CHANNELS];
};
typedef struct {
snd_ctl_ext_t ext;
struct spa_system *system;
struct pw_thread_loop *mainloop;
struct pw_context *context;
struct pw_core *core;
struct spa_hook core_listener;
struct pw_registry *registry;
struct spa_hook registry_listener;
struct pw_metadata *metadata;
struct spa_hook metadata_listener;
int fd;
int last_seq;
int pending_seq;
int error;
char default_sink[1024];
int sink_muted;
struct volume sink_volume;
char default_source[1024];
int source_muted;
struct volume source_volume;
int subscribed;
#define UPDATE_SINK_VOL (1<<0)
#define UPDATE_SINK_MUTE (1<<1)
#define UPDATE_SOURCE_VOL (1<<2)
#define UPDATE_SOURCE_MUTE (1<<3)
int updated;
struct spa_list globals;
} snd_ctl_pipewire_t;
struct global;
struct global_info {
const char *type;
uint32_t version;
const void *events;
pw_destroy_t destroy;
int (*init) (struct global *g);
};
struct global {
struct spa_list link;
snd_ctl_pipewire_t *ctl;
const struct global_info *ginfo;
uint32_t id;
uint32_t permissions;
struct pw_properties *props;
struct pw_proxy *proxy;
struct spa_hook proxy_listener;
struct spa_hook object_listener;
union {
struct {
#define NODE_FLAG_SINK (1<<0)
#define NODE_FLAG_SOURCE (1<<1)
#define NODE_FLAG_DEVICE_VOLUME (1<<2)
#define NODE_FLAG_DEVICE_MUTE (1<<3)
uint32_t flags;
uint32_t device_id;
uint32_t profile_device_id;
int priority;
float volume;
bool mute;
struct volume channel_volume;
} node;
struct {
uint32_t active_route_output;
uint32_t active_route_input;
} device;
};
};
#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"
static void do_resync(snd_ctl_pipewire_t *ctl)
{
ctl->pending_seq = pw_core_sync(ctl->core, PW_ID_CORE, ctl->pending_seq);
}
static int wait_resync(snd_ctl_pipewire_t *ctl)
{
do_resync(ctl);
while (true) {
pw_thread_loop_wait(ctl->mainloop);
if (ctl->error)
return ctl->error;
if (ctl->pending_seq == ctl->last_seq)
break;
}
return 0;
}
static struct global *find_global(snd_ctl_pipewire_t *ctl, uint32_t id,
const char *name, const char *type)
{
struct global *g;
uint32_t name_id = name ? (uint32_t)atoi(name) : SPA_ID_INVALID;
const char *str;
spa_list_for_each(g, &ctl->globals, link) {
if ((g->id == id || g->id == name_id) &&
(type == NULL || spa_streq(g->ginfo->type, type)))
return g;
if (name != NULL && name[0] != '\0' &&
(str = pw_properties_get(g->props, PW_KEY_NODE_NAME)) != NULL &&
spa_streq(name, str))
return g;
}
return NULL;
}
static struct global *find_best_node(snd_ctl_pipewire_t *ctl, uint32_t flags)
{
struct global *g, *best = NULL;
spa_list_for_each(g, &ctl->globals, link) {
if ((spa_streq(g->ginfo->type, PW_TYPE_INTERFACE_Node)) &&
(flags == 0 || (g->node.flags & flags) == flags) &&
(best == NULL || best->node.priority < g->node.priority))
best = g;
}
return best;
}
static inline int poll_activate(snd_ctl_pipewire_t *ctl)
{
spa_system_eventfd_write(ctl->system, ctl->fd, 1);
return 1;
}
static inline int poll_deactivate(snd_ctl_pipewire_t *ctl)
{
uint64_t val;
spa_system_eventfd_read(ctl->system, ctl->fd, &val);
return 1;
}
static bool volume_equal(struct volume *a, struct volume *b)
{
if (a == b)
return true;
if (a->channels != b->channels)
return false;
return memcmp(a->values, b->values, sizeof(float) * a->channels) == 0;
}
static int pipewire_update_volume(snd_ctl_pipewire_t * ctl)
{
bool changed = false;
struct global *g;
if (ctl->default_sink[0] == '\0')
g = find_best_node(ctl, NODE_FLAG_SINK);
else
g = find_global(ctl, SPA_ID_INVALID, ctl->default_sink,
PW_TYPE_INTERFACE_Node);
if (g) {
if (!!ctl->sink_muted != !!g->node.mute) {
ctl->sink_muted = g->node.mute;
ctl->updated |= UPDATE_SINK_MUTE;
changed = true;
}
if (!volume_equal(&ctl->sink_volume, &g->node.channel_volume)) {
ctl->sink_volume = g->node.channel_volume;
ctl->updated |= UPDATE_SINK_VOL;
changed = true;
}
}
if (ctl->default_source[0] == '\0')
g = find_best_node(ctl, NODE_FLAG_SOURCE);
else
g = find_global(ctl, SPA_ID_INVALID, ctl->default_source,
PW_TYPE_INTERFACE_Node);
if (g) {
if (!!ctl->source_muted != !!g->node.mute) {
ctl->source_muted = g->node.mute;
ctl->updated |= UPDATE_SOURCE_MUTE;
changed = true;
}
if (!volume_equal(&ctl->source_volume, &g->node.channel_volume)) {
ctl->source_volume = g->node.channel_volume;
ctl->updated |= UPDATE_SOURCE_VOL;
changed = true;
}
}
if (changed)
poll_activate(ctl);
return 0;
}
static int pipewire_elem_count(snd_ctl_ext_t * ext)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int count = 0, err;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0) {
count = err;
goto finish;
}
err = pipewire_update_volume(ctl);
if (err < 0) {
count = err;
goto finish;
}
if (ctl->default_source[0] != '\0')
count += 2;
if (ctl->default_sink[0] != '\0')
count += 2;
finish:
pw_thread_loop_unlock(ctl->mainloop);
return count;
}
static int pipewire_elem_list(snd_ctl_ext_t * ext, unsigned int offset,
snd_ctl_elem_id_t * id)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int err;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER);
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
if (ctl->default_source[0] != '\0') {
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;
err = 0;
finish:
pw_thread_loop_unlock(ctl->mainloop);
if (err >= 0) {
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 err;
}
static snd_ctl_ext_key_t pipewire_find_elem(snd_ctl_ext_t * ext,
const snd_ctl_elem_id_t * id)
{
const char *name;
unsigned int numid;
numid = snd_ctl_elem_id_get_numid(id);
if (numid > 0 && numid <= 4)
return numid - 1;
name = snd_ctl_elem_id_get_name(id);
if (spa_streq(name, SOURCE_VOL_NAME))
return 0;
if (spa_streq(name, SOURCE_MUTE_NAME))
return 1;
if (spa_streq(name, SINK_VOL_NAME))
return 2;
if (spa_streq(name, SINK_MUTE_NAME))
return 3;
return SND_CTL_EXT_KEY_NOT_FOUND;
}
static int pipewire_get_attribute(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
int *type, unsigned int *acc,
unsigned int *count)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int err = 0;
if (key > 3)
return -EINVAL;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
err = pipewire_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:
pw_thread_loop_unlock(ctl->mainloop);
return err;
}
static int pipewire_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 = VOLUME_MAX;
return 0;
}
static int pipewire_read_integer(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
long *value)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int err = 0;
uint32_t i;
struct volume *vol = NULL;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
err = pipewire_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:
pw_thread_loop_unlock(ctl->mainloop);
return err;
}
static struct spa_pod *build_volume_mute(struct spa_pod_builder *b, struct volume *volume, int *mute)
{
struct spa_pod_frame f[1];
spa_pod_builder_push_object(b, &f[0],
SPA_TYPE_OBJECT_Props, SPA_PARAM_Props);
if (volume) {
float volumes[SPA_AUDIO_MAX_CHANNELS];
uint32_t i, n_volumes = 0;
n_volumes = volume->channels;
for (i = 0; i < n_volumes; i++)
volumes[i] = volume->values[i] / (float) VOLUME_MAX;
spa_pod_builder_prop(b, SPA_PROP_channelVolumes, 0);
spa_pod_builder_array(b, sizeof(float),
SPA_TYPE_Float, n_volumes, volumes);
}
if (mute) {
spa_pod_builder_prop(b, SPA_PROP_mute, 0);
spa_pod_builder_bool(b, *mute ? true : false);
}
return spa_pod_builder_pop(b, &f[0]);
}
static int set_volume_mute(snd_ctl_pipewire_t *ctl, const char *name, struct volume *volume, int *mute)
{
struct global *g, *dg;
uint32_t id = SPA_ID_INVALID, device_id = SPA_ID_INVALID;
char buf[1024];
struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buf, sizeof(buf));
struct spa_pod_frame f[2];
struct spa_pod *param;
g = find_global(ctl, SPA_ID_INVALID, name, PW_TYPE_INTERFACE_Node);
if (g == NULL)
return -EINVAL;
if (SPA_FLAG_IS_SET(g->node.flags, NODE_FLAG_DEVICE_VOLUME) &&
(dg = find_global(ctl, g->node.device_id, NULL, PW_TYPE_INTERFACE_Device)) != NULL) {
if (g->node.flags & NODE_FLAG_SINK)
id = dg->device.active_route_output;
else if (g->node.flags & NODE_FLAG_SOURCE)
id = dg->device.active_route_input;
device_id = g->node.profile_device_id;
}
pw_log_debug("id %d device_id %d flags:%08x", id, device_id, g->node.flags);
if (id != SPA_ID_INVALID && device_id != SPA_ID_INVALID) {
if (!SPA_FLAG_IS_SET(dg->permissions, PW_PERM_W | PW_PERM_X))
return -EPERM;
spa_pod_builder_push_object(&b, &f[0],
SPA_TYPE_OBJECT_ParamRoute, SPA_PARAM_Route);
spa_pod_builder_add(&b,
SPA_PARAM_ROUTE_index, SPA_POD_Int(id),
SPA_PARAM_ROUTE_device, SPA_POD_Int(device_id),
0);
spa_pod_builder_prop(&b, SPA_PARAM_ROUTE_props, 0);
build_volume_mute(&b, volume, mute);
param = spa_pod_builder_pop(&b, &f[0]);
pw_log_debug("set device %d mute/volume for node %d", dg->id, g->id);
pw_device_set_param((struct pw_node*)dg->proxy,
SPA_PARAM_Route, 0, param);
} else {
if (!SPA_FLAG_IS_SET(g->permissions, PW_PERM_W | PW_PERM_X))
return -EPERM;
param = build_volume_mute(&b, volume, mute);
pw_log_debug("set node %d mute/volume", g->id);
pw_node_set_param((struct pw_node*)g->proxy,
SPA_PARAM_Props, 0, param);
}
return 0;
}
static int pipewire_write_integer(snd_ctl_ext_t * ext, snd_ctl_ext_key_t key,
long *value)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int err = 0;
uint32_t i;
struct volume *vol = NULL;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
err = pipewire_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)
err = set_volume_mute(ctl, ctl->default_source, vol, NULL);
else
err = set_volume_mute(ctl, ctl->default_sink, vol, NULL);
} else {
if (key == 1)
err = set_volume_mute(ctl, ctl->default_source, NULL, &ctl->source_muted);
else
err = set_volume_mute(ctl, ctl->default_sink, NULL, &ctl->sink_muted);
}
if (err < 0)
goto finish;
err = wait_resync(ctl);
if (err < 0)
goto finish;
err = 1;
finish:
pw_thread_loop_unlock(ctl->mainloop);
return err;
}
static void pipewire_subscribe_events(snd_ctl_ext_t * ext, int subscribe)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
assert(ctl);
if (!ctl->mainloop)
return;
pw_thread_loop_lock(ctl->mainloop);
ctl->subscribed = !!(subscribe & SND_CTL_EVENT_MASK_VALUE);
pw_thread_loop_unlock(ctl->mainloop);
}
static int pipewire_read_event(snd_ctl_ext_t * ext, snd_ctl_elem_id_t * id,
unsigned int *event_mask)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int offset;
int err;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
if (!ctl->updated || !ctl->subscribed) {
err = -EAGAIN;
goto finish;
}
if (ctl->default_source[0] != '\0')
offset = 2;
else
offset = 0;
if (ctl->updated & UPDATE_SOURCE_VOL) {
pipewire_elem_list(ext, 0, id);
ctl->updated &= ~UPDATE_SOURCE_VOL;
} else if (ctl->updated & UPDATE_SOURCE_MUTE) {
pipewire_elem_list(ext, 1, id);
ctl->updated &= ~UPDATE_SOURCE_MUTE;
} else if (ctl->updated & UPDATE_SINK_VOL) {
pipewire_elem_list(ext, offset + 0, id);
ctl->updated &= ~UPDATE_SINK_VOL;
} else if (ctl->updated & UPDATE_SINK_MUTE) {
pipewire_elem_list(ext, offset + 1, id);
ctl->updated &= ~UPDATE_SINK_MUTE;
}
*event_mask = SND_CTL_EVENT_MASK_VALUE;
if (!ctl->updated)
poll_deactivate(ctl);
err = 1;
finish:
pw_thread_loop_unlock(ctl->mainloop);
return err;
}
static int pipewire_ctl_poll_revents(snd_ctl_ext_t * ext, struct pollfd *pfd,
unsigned int nfds,
unsigned short *revents)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
int err = 0;
assert(ctl);
if (!ctl->mainloop)
return -EBADFD;
pw_thread_loop_lock(ctl->mainloop);
err = ctl->error;
if (err < 0)
goto finish;
if (ctl->updated)
*revents = POLLIN;
else
*revents = 0;
err = 0;
finish:
pw_thread_loop_unlock(ctl->mainloop);
return err;
}
static void snd_ctl_pipewire_free(snd_ctl_pipewire_t *ctl)
{
if (ctl == NULL)
return;
pw_log_debug(NAME" %p:", ctl);
if (ctl->mainloop)
pw_thread_loop_stop(ctl->mainloop);
if (ctl->registry)
pw_proxy_destroy((struct pw_proxy*)ctl->registry);
if (ctl->context)
pw_context_destroy(ctl->context);
if (ctl->fd >= 0)
spa_system_close(ctl->system, ctl->fd);
if (ctl->mainloop)
pw_thread_loop_destroy(ctl->mainloop);
free(ctl);
}
static void pipewire_close(snd_ctl_ext_t * ext)
{
snd_ctl_pipewire_t *ctl = ext->private_data;
snd_ctl_pipewire_free(ctl);
}
static const snd_ctl_ext_callback_t pipewire_ext_callback = {
.elem_count = pipewire_elem_count,
.elem_list = pipewire_elem_list,
.find_elem = pipewire_find_elem,
.get_attribute = pipewire_get_attribute,
.get_integer_info = pipewire_get_integer_info,
.read_integer = pipewire_read_integer,
.write_integer = pipewire_write_integer,
.subscribe_events = pipewire_subscribe_events,
.read_event = pipewire_read_event,
.poll_revents = pipewire_ctl_poll_revents,
.close = pipewire_close,
};
/** device */
static void device_event_info(void *object, const struct pw_device_info *info)
{
struct global *g = object;
snd_ctl_pipewire_t *ctl = g->ctl;
uint32_t n;
pw_log_debug("info");
if (info->change_mask & PW_DEVICE_CHANGE_MASK_PARAMS) {
for (n = 0; n < info->n_params; n++) {
if (!(info->params[n].flags & SPA_PARAM_INFO_READ))
continue;
switch (info->params[n].id) {
case SPA_PARAM_Route:
pw_device_enum_params((struct pw_device*)g->proxy,
0, info->params[n].id, 0, -1, NULL);
break;
default:
break;
}
}
}
do_resync(ctl);
}
static void parse_props(struct global *g, const struct spa_pod *param, bool device)
{
struct spa_pod_prop *prop;
struct spa_pod_object *obj = (struct spa_pod_object *) param;
SPA_POD_OBJECT_FOREACH(obj, prop) {
switch (prop->key) {
case SPA_PROP_volume:
if (spa_pod_get_float(&prop->value, &g->node.volume) < 0)
continue;
pw_log_debug("update node %d volume", g->id);
SPA_FLAG_UPDATE(g->node.flags, NODE_FLAG_DEVICE_VOLUME, device);
break;
case SPA_PROP_mute:
if (spa_pod_get_bool(&prop->value, &g->node.mute) < 0)
continue;
SPA_FLAG_UPDATE(g->node.flags, NODE_FLAG_DEVICE_MUTE, device);
pw_log_debug("update node %d mute", g->id);
break;
case SPA_PROP_channelVolumes:
{
float volumes[SPA_AUDIO_MAX_CHANNELS];
uint32_t n_volumes, i;
n_volumes = spa_pod_copy_array(&prop->value, SPA_TYPE_Float,
volumes, SPA_AUDIO_MAX_CHANNELS);
g->node.channel_volume.channels = n_volumes;
for (i = 0; i < n_volumes; i++)
g->node.channel_volume.values[i] = volumes[i] * VOLUME_MAX;
SPA_FLAG_UPDATE(g->node.flags, NODE_FLAG_DEVICE_VOLUME, device);
pw_log_debug("update node %d channelVolumes", g->id);
break;
}
default:
break;
}
}
}
static struct global *find_node_for_route(snd_ctl_pipewire_t *ctl, uint32_t card, uint32_t device)
{
struct global *n;
spa_list_for_each(n, &ctl->globals, link) {
if (spa_streq(n->ginfo->type, PW_TYPE_INTERFACE_Node) &&
(n->node.device_id == card) &&
(n->node.profile_device_id == device))
return n;
}
return NULL;
}
static void device_event_param(void *object, int seq,
uint32_t id, uint32_t index, uint32_t next,
const struct spa_pod *param)
{
struct global *g = object;
snd_ctl_pipewire_t *ctl = g->ctl;
pw_log_debug("param %d", id);
switch (id) {
case SPA_PARAM_Route:
{
uint32_t idx, device;
enum spa_direction direction;
struct spa_pod *props = NULL;
struct global *ng;
if (spa_pod_parse_object(param,
SPA_TYPE_OBJECT_ParamRoute, NULL,
SPA_PARAM_ROUTE_index, SPA_POD_Int(&idx),
SPA_PARAM_ROUTE_direction, SPA_POD_Id(&direction),
SPA_PARAM_ROUTE_device, SPA_POD_Int(&device),
SPA_PARAM_ROUTE_props, SPA_POD_OPT_Pod(&props)) < 0) {
pw_log_warn("device %d: can't parse route", g->id);
return;
}
if (direction == SPA_DIRECTION_OUTPUT)
g->device.active_route_output = idx;
else
g->device.active_route_input = idx;
pw_log_debug("device %d: active %s route %d", g->id,
direction == SPA_DIRECTION_OUTPUT ? "output" : "input",
idx);
ng = find_node_for_route(ctl, g->id, device);
if (props && ng)
parse_props(ng, props, true);
break;
}
default:
break;
}
}
static const struct pw_device_events device_events = {
PW_VERSION_DEVICE_EVENTS,
.info = device_event_info,
.param = device_event_param,
};
static const struct global_info device_info = {
.type = PW_TYPE_INTERFACE_Device,
.version = PW_VERSION_DEVICE,
.events = &device_events,
};
/** node */
static void node_event_info(void *object, const struct pw_node_info *info)
{
struct global *g = object;
snd_ctl_pipewire_t *ctl = g->ctl;
const char *str;
uint32_t i;
pw_log_debug("update %d %"PRIu64, g->id, info->change_mask);
if (info->change_mask & PW_NODE_CHANGE_MASK_PROPS && info->props) {
if ((str = spa_dict_lookup(info->props, "card.profile.device")))
g->node.profile_device_id = atoi(str);
else
g->node.profile_device_id = SPA_ID_INVALID;
if ((str = spa_dict_lookup(info->props, PW_KEY_DEVICE_ID)))
g->node.device_id = atoi(str);
else
g->node.device_id = SPA_ID_INVALID;
if ((str = spa_dict_lookup(info->props, PW_KEY_PRIORITY_SESSION)))
g->node.priority = atoi(str);
if ((str = spa_dict_lookup(info->props, PW_KEY_MEDIA_CLASS))) {
if (spa_streq(str, "Audio/Sink"))
g->node.flags |= NODE_FLAG_SINK;
else if (spa_streq(str, "Audio/Source"))
g->node.flags |= NODE_FLAG_SOURCE;
}
}
if (info->change_mask & PW_NODE_CHANGE_MASK_PARAMS) {
for (i = 0; i < info->n_params; i++) {
if (!(info->params[i].flags & SPA_PARAM_INFO_READ))
continue;
switch (info->params[i].id) {
case SPA_PARAM_Props:
pw_node_enum_params((struct pw_node*)g->proxy,
0, info->params[i].id, 0, -1, NULL);
break;
default:
break;
}
}
}
do_resync(ctl);
}
static void node_event_param(void *object, int seq,
uint32_t id, uint32_t index, uint32_t next,
const struct spa_pod *param)
{
struct global *g = object;
pw_log_debug("update param %d %d", g->id, id);
switch (id) {
case SPA_PARAM_Props:
if (!SPA_FLAG_IS_SET(g->node.flags, NODE_FLAG_DEVICE_VOLUME | NODE_FLAG_DEVICE_MUTE))
parse_props(g, param, false);
break;
default:
break;
}
}
static const struct pw_node_events node_events = {
PW_VERSION_NODE_EVENTS,
.info = node_event_info,
.param = node_event_param,
};
static const struct global_info node_info = {
.type = PW_TYPE_INTERFACE_Node,
.version = PW_VERSION_NODE,
.events = &node_events,
};
/** metadata */
static int json_object_find(const char *obj, const char *key, char *value, size_t len)
{
struct spa_json it[2];
const char *v;
char k[128];
spa_json_init(&it[0], obj, strlen(obj));
if (spa_json_enter_object(&it[0], &it[1]) <= 0)
return -EINVAL;
while (spa_json_get_string(&it[1], k, sizeof(k)-1) > 0) {
if (spa_streq(k, key)) {
if (spa_json_get_string(&it[1], value, len) <= 0)
continue;
return 0;
} else {
if (spa_json_next(&it[1], &v) <= 0)
break;
}
}
return -ENOENT;
}
static int metadata_property(void *object,
uint32_t subject,
const char *key,
const char *type,
const char *value)
{
struct global *g = object;
snd_ctl_pipewire_t *ctl = g->ctl;
if (subject == PW_ID_CORE) {
if (key == NULL || spa_streq(key, "default.audio.sink")) {
if (value == NULL ||
json_object_find(value, "name",
ctl->default_sink, sizeof(ctl->default_sink)) < 0)
ctl->default_sink[0] = '\0';
pw_log_debug("found default sink: %s", ctl->default_sink);
}
if (key == NULL || spa_streq(key, "default.audio.source")) {
if (value == NULL ||
json_object_find(value, "name",
ctl->default_source, sizeof(ctl->default_source)) < 0)
ctl->default_source[0] = '\0';
pw_log_debug("found default source: %s", ctl->default_source);
}
}
return 0;
}
static int metadata_init(struct global *g)
{
snd_ctl_pipewire_t *ctl = g->ctl;
ctl->metadata = (struct pw_metadata*)g->proxy;
return 0;
}
static const struct pw_metadata_events metadata_events = {
PW_VERSION_METADATA_EVENTS,
.property = metadata_property,
};
static const struct global_info metadata_info = {
.type = PW_TYPE_INTERFACE_Metadata,
.version = PW_VERSION_METADATA,
.events = &metadata_events,
.init = metadata_init
};
/** proxy */
static void proxy_removed(void *data)
{
struct global *g = data;
pw_proxy_destroy(g->proxy);
}
static void proxy_destroy(void *data)
{
struct global *g = data;
spa_list_remove(&g->link);
g->proxy = NULL;
}
static const struct pw_proxy_events proxy_events = {
PW_VERSION_PROXY_EVENTS,
.removed = proxy_removed,
.destroy = proxy_destroy
};
static void registry_event_global(void *data, uint32_t id,
uint32_t permissions, const char *type, uint32_t version,
const struct spa_dict *props)
{
snd_ctl_pipewire_t *ctl = data;
const struct global_info *info = NULL;
struct pw_proxy *proxy;
const char *str;
pw_log_debug("got %d %s", id, type);
if (spa_streq(type, PW_TYPE_INTERFACE_Device)) {
if (props == NULL ||
((str = spa_dict_lookup(props, PW_KEY_MEDIA_CLASS)) == NULL) ||
(!spa_streq(str, "Audio/Device")))
return;
pw_log_debug("found device %d", id);
info = &device_info;
} else if (spa_streq(type, PW_TYPE_INTERFACE_Node)) {
if (props == NULL ||
((str = spa_dict_lookup(props, PW_KEY_MEDIA_CLASS)) == NULL) ||
((!spa_streq(str, "Audio/Sink")) &&
(!spa_streq(str, "Audio/Source"))))
return;
pw_log_debug("found node %d type:%s", id, str);
info = &node_info;
} else if (spa_streq(type, PW_TYPE_INTERFACE_Metadata)) {
if (props == NULL ||
((str = spa_dict_lookup(props, PW_KEY_METADATA_NAME)) == NULL) ||
(!spa_streq(str, "default")))
return;
if (ctl->metadata != NULL)
return;
info = &metadata_info;
}
if (info) {
struct global *g;
proxy = pw_registry_bind(ctl->registry,
id, info->type, info->version,
sizeof(struct global));
g = pw_proxy_get_user_data(proxy);
g->ctl = ctl;
g->ginfo = info;
g->id = id;
g->permissions = permissions;
g->props = props ? pw_properties_new_dict(props) : NULL;
g->proxy = proxy;
spa_list_append(&ctl->globals, &g->link);
pw_proxy_add_listener(proxy,
&g->proxy_listener,
&proxy_events, g);
if (info->events) {
pw_proxy_add_object_listener(proxy,
&g->object_listener,
info->events, g);
}
if (info->init)
info->init(g);
do_resync(ctl);
}
}
static void registry_event_global_remove(void *data, uint32_t id)
{
snd_ctl_pipewire_t *ctl = data;
struct global *g;
const char *name;
if ((g = find_global(ctl, id, NULL, PW_TYPE_INTERFACE_Node)) == NULL)
return;
if ((name = pw_properties_get(g->props, PW_KEY_NODE_NAME)) == NULL)
return;
if (spa_streq(name, ctl->default_sink))
ctl->default_sink[0] = '\0';
if (spa_streq(name, ctl->default_source))
ctl->default_source[0] = '\0';
}
static const struct pw_registry_events registry_events = {
PW_VERSION_REGISTRY_EVENTS,
.global = registry_event_global,
.global_remove = registry_event_global_remove,
};
static void on_core_error(void *data, uint32_t id, int seq, int res, const char *message)
{
snd_ctl_pipewire_t *ctl = data;
pw_log_warn(NAME" %p: error id:%u seq:%d res:%d (%s): %s", ctl,
id, seq, res, spa_strerror(res), message);
if (id == PW_ID_CORE) {
ctl->error = res;
if (ctl->fd != -1)
poll_activate(ctl);
}
pw_thread_loop_signal(ctl->mainloop, false);
}
static void on_core_done(void *data, uint32_t id, int seq)
{
snd_ctl_pipewire_t *ctl = data;
pw_log_debug("done %d %d %d", id, seq, ctl->pending_seq);
if (id != PW_ID_CORE)
return;
ctl->last_seq = ctl->pending_seq;
if (seq == ctl->pending_seq) {
pipewire_update_volume(ctl);
pw_thread_loop_signal(ctl->mainloop, false);
}
}
static const struct pw_core_events core_events = {
PW_VERSION_CORE_EVENTS,
.error = on_core_error,
.done = on_core_done,
};
SPA_EXPORT
SND_CTL_PLUGIN_DEFINE_FUNC(pipewire)
{
snd_config_iterator_t i, next;
const char *server = NULL;
const char *device = NULL;
const char *source = NULL;
const char *sink = NULL;
const char *fallback_name = NULL;
int err;
const char *str;
struct pw_properties *props = NULL;
snd_ctl_pipewire_t *ctl;
struct pw_loop *loop;
pw_init(NULL, NULL);
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 (spa_streq(id, "comment") || spa_streq(id, "type")
|| spa_streq(id, "hint"))
continue;
if (spa_streq(id, "server")) {
if (snd_config_get_string(n, &server) < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
} else if (!*server) {
server = NULL;
}
continue;
}
if (spa_streq(id, "device")) {
if (snd_config_get_string(n, &device) < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
} else if (!*device) {
device = NULL;
}
continue;
}
if (spa_streq(id, "source")) {
if (snd_config_get_string(n, &source) < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
} else if (!*source) {
source = NULL;
}
continue;
}
if (spa_streq(id, "sink")) {
if (snd_config_get_string(n, &sink) < 0) {
SNDERR("Invalid type for %s", id);
return -EINVAL;
} else if (!*sink) {
sink = NULL;
}
continue;
}
if (spa_streq(id, "fallback")) {
if (snd_config_get_string(n, &fallback_name) < 0) {
SNDERR("Invalid value for %s", id);
return -EINVAL;
}
continue;
}
SNDERR("Unknown field %s", id);
return -EINVAL;
}
str = getenv("PIPEWIRE_REMOTE");
if (str != NULL && str[0] != '\0')
server = str;
if (fallback_name && name && spa_streq(name, fallback_name))
fallback_name = NULL; /* no fallback for the same name */
ctl = calloc(1, sizeof(*ctl));
if (!ctl)
return -ENOMEM;
spa_list_init(&ctl->globals);
if (source == NULL)
source = device;
if (source != NULL)
snprintf(ctl->default_source, sizeof(ctl->default_source),
"%s", source);
if (sink == NULL)
sink = device;
if (sink != NULL)
snprintf(ctl->default_sink, sizeof(ctl->default_sink),
"%s", sink);
ctl->mainloop = pw_thread_loop_new("alsa-pipewire", NULL);
if (ctl->mainloop == NULL) {
err = -errno;
goto error;
}
loop = pw_thread_loop_get_loop(ctl->mainloop);
ctl->system = loop->system;
ctl->fd = spa_system_eventfd_create(ctl->system, SPA_FD_CLOEXEC | SPA_FD_NONBLOCK);
if (ctl->fd == -1) {
err = -errno;
goto error;
}
ctl->context = pw_context_new(loop, NULL, 0);
if (ctl->context == NULL) {
err = -errno;
goto error;
}
props = pw_properties_new(NULL, NULL);
if (props == NULL) {
err = -errno;
goto error;
}
pw_properties_setf(props, PW_KEY_APP_NAME, "PipeWire ALSA [%s]",
pw_get_prgname());
if (server)
pw_properties_set(props, PW_KEY_REMOTE_NAME, server);
if ((err = pw_thread_loop_start(ctl->mainloop)) < 0)
goto error;
pw_thread_loop_lock(ctl->mainloop);
ctl->core = pw_context_connect(ctl->context, props, 0);
props = NULL;
if (ctl->core == NULL) {
err = -errno;
goto error_unlock;
}
pw_core_add_listener(ctl->core,
&ctl->core_listener,
&core_events, ctl);
ctl->registry = pw_core_get_registry(ctl->core, PW_VERSION_REGISTRY, 0);
if (ctl->registry == NULL) {
err = -errno;
goto error_unlock;
}
pw_registry_add_listener(ctl->registry,
&ctl->registry_listener,
&registry_events, ctl);
err = wait_resync(ctl);
if (err < 0)
goto error_unlock;
pw_thread_loop_unlock(ctl->mainloop);
ctl->ext.version = SND_CTL_EXT_VERSION;
ctl->ext.card_idx = 0;
strncpy(ctl->ext.id, "pipewire", sizeof(ctl->ext.id) - 1);
strncpy(ctl->ext.driver, "PW plugin", sizeof(ctl->ext.driver) - 1);
strncpy(ctl->ext.name, "PipeWire", sizeof(ctl->ext.name) - 1);
strncpy(ctl->ext.longname, "PipeWire", sizeof(ctl->ext.longname) - 1);
strncpy(ctl->ext.mixername, "PipeWire", sizeof(ctl->ext.mixername) - 1);
ctl->ext.poll_fd = ctl->fd;
ctl->ext.callback = &pipewire_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_unlock:
pw_thread_loop_unlock(ctl->mainloop);
error:
snd_ctl_pipewire_free(ctl);
pw_log_error("error %d (%s)", err, spa_strerror(err));
if (fallback_name)
return snd_ctl_open_fallback(handlep, root,
fallback_name, name, mode);
return err;
}
SPA_EXPORT
SND_CTL_PLUGIN_SYMBOL(pipewire);
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