mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-12-21 08:56:52 -05:00
Fixed mmap wrt shm. Renamed pcm_client, control_client to shm. More error messages. Implemented asoundrc as documented.
This commit is contained in:
Abramo Bagnara
parent
dcc88ffaa7
commit
e5e1ca14d4
30 changed files with 1642 additions and 2555 deletions
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@ -1,7 +1,7 @@
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EXTRA_LTLIBRARIES = libcontrol.la
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libcontrol_la_SOURCES = cards.c controls.c bag.c defaults.c \
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control.c control_hw.c control_client.c
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control.c control_hw.c control_shm.c
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all: libcontrol.la
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@ -106,7 +106,7 @@ int snd_card_get_index(const char *string)
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for (card = 0; card < 32; card++) {
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if (snd_card_load(card) < 0)
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continue;
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if (snd_ctl_hw_open(&handle, card) < 0)
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if (snd_ctl_hw_open(&handle, NULL, card) < 0)
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continue;
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if (snd_ctl_hw_info(handle, &info) < 0) {
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snd_ctl_close(handle);
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@ -127,7 +127,7 @@ int snd_card_get_name(int card, char **name)
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if (name == NULL)
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return -EINVAL;
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if ((err = snd_ctl_hw_open(&handle, card)) < 0)
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if ((err = snd_ctl_hw_open(&handle, NULL, card)) < 0)
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return err;
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if ((err = snd_ctl_hw_info(handle, &info)) < 0) {
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snd_ctl_close(handle);
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@ -148,7 +148,7 @@ int snd_card_get_longname(int card, char **name)
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if (name == NULL)
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return -EINVAL;
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if ((err = snd_ctl_hw_open(&handle, card)) < 0)
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if ((err = snd_ctl_hw_open(&handle, NULL, card)) < 0)
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return err;
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if ((err = snd_ctl_hw_info(handle, &info)) < 0) {
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snd_ctl_close(handle);
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@ -26,6 +26,7 @@
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#include <errno.h>
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#include <fcntl.h>
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#include <assert.h>
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#include <dlfcn.h>
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#include "asoundlib.h"
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#include "control_local.h"
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@ -148,106 +149,22 @@ int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_callbacks_t * callbacks)
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return result >= 0 ? count : -errno;
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}
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static int _snd_ctl_open_hw(snd_ctl_t **handlep, snd_config_t *conf)
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{
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snd_config_iterator_t i;
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long card = -1;
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char *str;
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int err;
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snd_config_foreach(i, conf) {
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snd_config_t *n = snd_config_entry(i);
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if (strcmp(n->id, "comment") == 0)
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continue;
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if (strcmp(n->id, "type") == 0)
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continue;
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if (strcmp(n->id, "card") == 0) {
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err = snd_config_integer_get(n, &card);
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if (err < 0) {
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err = snd_config_string_get(n, &str);
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if (err < 0)
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return -EINVAL;
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card = snd_card_get_index(str);
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if (card < 0)
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return card;
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}
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continue;
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}
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return -EINVAL;
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}
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if (card < 0)
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return -EINVAL;
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return snd_ctl_hw_open(handlep, card);
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}
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static int _snd_ctl_open_client(snd_ctl_t **handlep, snd_config_t *conf)
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{
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snd_config_iterator_t i;
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char *socket = NULL;
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char *name = NULL;
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char *host = NULL;
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long port = -1;
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int err;
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snd_config_foreach(i, conf) {
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snd_config_t *n = snd_config_entry(i);
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if (strcmp(n->id, "comment") == 0)
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continue;
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if (strcmp(n->id, "type") == 0)
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continue;
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if (strcmp(n->id, "socket") == 0) {
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err = snd_config_string_get(n, &socket);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "host") == 0) {
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err = snd_config_string_get(n, &host);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "port") == 0) {
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err = snd_config_integer_get(n, &port);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "name") == 0) {
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err = snd_config_string_get(n, &name);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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return -EINVAL;
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}
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if (!name)
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return -EINVAL;
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if (socket) {
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if (port >= 0 || host)
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return -EINVAL;
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return snd_ctl_client_open(handlep, socket, -1, SND_TRANSPORT_TYPE_SHM, name);
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} else {
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if (port < 0 || !name)
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return -EINVAL;
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return snd_ctl_client_open(handlep, host, port, SND_TRANSPORT_TYPE_TCP, name);
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}
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}
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int snd_ctl_open(snd_ctl_t **handlep, char *name)
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int snd_ctl_open(snd_ctl_t **ctlp, char *name)
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{
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char *str;
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int err;
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snd_config_t *ctl_conf, *conf;
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assert(handlep && name);
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snd_config_t *ctl_conf, *conf, *type_conf;
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snd_config_iterator_t i;
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char *lib = NULL, *open = NULL;
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int (*open_func)(snd_ctl_t **ctlp, char *name, snd_config_t *conf);
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void *h;
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assert(ctlp && name);
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err = snd_config_update();
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if (err < 0)
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return err;
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err = snd_config_searchv(snd_config, &ctl_conf, "ctl", name, 0);
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if (err < 0) {
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int idx = snd_card_get_index(name);
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if (idx < 0)
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return idx;
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return snd_ctl_hw_open(handlep, idx);
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}
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if (err < 0)
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return err;
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if (snd_config_type(ctl_conf) != SND_CONFIG_TYPE_COMPOUND)
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return -EINVAL;
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err = snd_config_search(ctl_conf, "type", &conf);
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@ -256,10 +173,37 @@ int snd_ctl_open(snd_ctl_t **handlep, char *name)
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err = snd_config_string_get(conf, &str);
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if (err < 0)
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return err;
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if (strcmp(str, "hw") == 0)
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return _snd_ctl_open_hw(handlep, ctl_conf);
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else if (strcmp(str, "client") == 0)
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return _snd_ctl_open_client(handlep, ctl_conf);
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else
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err = snd_config_searchv(snd_config, &type_conf, "ctltype", str, 0);
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if (err < 0)
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return err;
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snd_config_foreach(i, type_conf) {
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snd_config_t *n = snd_config_entry(i);
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if (strcmp(n->id, "comment") == 0)
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continue;
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if (strcmp(n->id, "lib") == 0) {
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err = snd_config_string_get(n, &lib);
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if (err < 0)
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return -EINVAL;
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continue;
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}
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if (strcmp(n->id, "open") == 0) {
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err = snd_config_string_get(n, &open);
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if (err < 0)
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return -EINVAL;
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continue;
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return -EINVAL;
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}
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}
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if (!open)
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return -EINVAL;
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if (!lib)
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lib = "libasound.so";
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h = dlopen(lib, RTLD_NOW);
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if (!h)
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return -ENOENT;
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open_func = dlsym(h, open);
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dlclose(h);
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if (!open_func)
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return -ENXIO;
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return open_func(ctlp, name, ctl_conf);
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}
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@ -1,433 +0,0 @@
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/*
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* Control - Client
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* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
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*
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/shm.h>
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#include <sys/socket.h>
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#include <sys/poll.h>
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#include <sys/un.h>
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#include <sys/uio.h>
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#include <sys/mman.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include "control_local.h"
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#include "aserver.h"
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typedef struct {
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int data_fd;
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int ctrl_fd;
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union {
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struct {
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void *ctrl;
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} shm;
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} u;
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} snd_ctl_client_t;
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static void clean_poll(snd_ctl_t *ctl)
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{
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snd_ctl_client_t *client = ctl->private;
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struct pollfd pfd;
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int err;
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char buf[1];
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pfd.fd = client->data_fd;
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pfd.events = POLLIN;
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while (1) {
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err = poll(&pfd, 1, 0);
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if (err == 0)
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break;
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assert(err > 0);
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err = read(client->data_fd, buf, 1);
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assert(err == 1);
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}
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}
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static int snd_ctl_client_shm_action(snd_ctl_t *ctl)
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{
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snd_ctl_client_t *client = ctl->private;
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int err;
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char buf[1];
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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clean_poll(ctl);
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err = write(client->ctrl_fd, buf, 1);
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if (err != 1)
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return -EBADFD;
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err = read(client->ctrl_fd, buf, 1);
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if (err != 1)
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return -EBADFD;
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if (ctrl->cmd) {
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fprintf(stderr, "Server has not done the cmd\n");
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return -EBADFD;
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}
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return 0;
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}
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static int snd_ctl_client_shm_close(snd_ctl_t *ctl)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int result;
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ctrl->cmd = SND_CTL_IOCTL_CLOSE;
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result = snd_ctl_client_shm_action(ctl);
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if (result >= 0)
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result = ctrl->result;
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shmdt((void *)ctrl);
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close(client->data_fd);
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close(client->ctrl_fd);
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free(client);
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return result;
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}
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static int snd_ctl_client_poll_descriptor(snd_ctl_t *ctl)
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{
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snd_ctl_client_t *client = ctl->private;
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return client->data_fd;
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}
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static int snd_ctl_client_shm_hw_info(snd_ctl_t *ctl, snd_ctl_hw_info_t *info)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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// ctrl->u.hw_info = *info;
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ctrl->cmd = SND_CTL_IOCTL_HW_INFO;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*info = ctrl->u.hw_info;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_clist(snd_ctl_t *ctl, snd_control_list_t *list)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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size_t maxsize = CTL_SHM_DATA_MAXLEN;
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size_t bytes = list->controls_request * sizeof(*list->pids);
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int err;
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snd_control_id_t *pids = list->pids;
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if (bytes > maxsize)
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return -EINVAL;
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ctrl->u.clist = *list;
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ctrl->cmd = SND_CTL_IOCTL_CONTROL_LIST;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*list = ctrl->u.clist;
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list->pids = pids;
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memcpy(pids, ctrl->data, bytes);
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return ctrl->result;
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}
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static int snd_ctl_client_shm_cinfo(snd_ctl_t *ctl, snd_control_info_t *info)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.cinfo = *info;
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ctrl->cmd = SND_CTL_IOCTL_CONTROL_INFO;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*info = ctrl->u.cinfo;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_cread(snd_ctl_t *ctl, snd_control_t *control)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.cread = *control;
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ctrl->cmd = SND_CTL_IOCTL_CONTROL_READ;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*control = ctrl->u.cread;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_cwrite(snd_ctl_t *ctl, snd_control_t *control)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.cwrite = *control;
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ctrl->cmd = SND_CTL_IOCTL_CONTROL_WRITE;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*control = ctrl->u.cwrite;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.hwdep_info = *info;
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ctrl->cmd = SND_CTL_IOCTL_HWDEP_INFO;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*info = ctrl->u.hwdep_info;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.pcm_info = *info;
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ctrl->cmd = SND_CTL_IOCTL_PCM_INFO;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*info = ctrl->u.pcm_info;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.pcm_prefer_subdevice = subdev;
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ctrl->cmd = SND_CTL_IOCTL_PCM_PREFER_SUBDEVICE;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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return ctrl->result;
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}
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static int snd_ctl_client_shm_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info)
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{
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snd_ctl_client_t *client = ctl->private;
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snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
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int err;
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ctrl->u.rawmidi_info = *info;
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ctrl->cmd = SND_CTL_IOCTL_RAWMIDI_INFO;
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err = snd_ctl_client_shm_action(ctl);
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if (err < 0)
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return err;
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*info = ctrl->u.rawmidi_info;
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return ctrl->result;
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}
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|
||||
static int snd_ctl_client_shm_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
|
||||
{
|
||||
snd_ctl_client_t *client = ctl->private;
|
||||
snd_ctl_client_shm_t *ctrl = client->u.shm.ctrl;
|
||||
int err;
|
||||
ctrl->u.read = *event;
|
||||
ctrl->cmd = SND_CTL_IOCTL_READ;
|
||||
err = snd_ctl_client_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*event = ctrl->u.read;
|
||||
return ctrl->result;
|
||||
}
|
||||
|
||||
struct snd_ctl_ops snd_ctl_client_ops = {
|
||||
close: snd_ctl_client_shm_close,
|
||||
poll_descriptor: snd_ctl_client_poll_descriptor,
|
||||
hw_info: snd_ctl_client_shm_hw_info,
|
||||
clist: snd_ctl_client_shm_clist,
|
||||
cinfo: snd_ctl_client_shm_cinfo,
|
||||
cread: snd_ctl_client_shm_cread,
|
||||
cwrite: snd_ctl_client_shm_cwrite,
|
||||
hwdep_info: snd_ctl_client_shm_hwdep_info,
|
||||
pcm_info: snd_ctl_client_shm_pcm_info,
|
||||
pcm_prefer_subdevice: snd_ctl_client_shm_pcm_prefer_subdevice,
|
||||
rawmidi_info: snd_ctl_client_shm_rawmidi_info,
|
||||
read: snd_ctl_client_shm_read,
|
||||
};
|
||||
|
||||
static int make_local_socket(const char *filename)
|
||||
{
|
||||
size_t l = strlen(filename);
|
||||
size_t size = offsetof(struct sockaddr_un, sun_path) + l;
|
||||
struct sockaddr_un *addr = alloca(size);
|
||||
int sock;
|
||||
|
||||
sock = socket(PF_LOCAL, SOCK_STREAM, 0);
|
||||
if (sock < 0)
|
||||
return -errno;
|
||||
|
||||
addr->sun_family = AF_LOCAL;
|
||||
memcpy(addr->sun_path, filename, l);
|
||||
|
||||
if (connect(sock, (struct sockaddr *) addr, size) < 0)
|
||||
return -errno;
|
||||
return sock;
|
||||
}
|
||||
|
||||
static int make_inet_socket(const char *host, int port)
|
||||
{
|
||||
struct sockaddr_in addr;
|
||||
int sock;
|
||||
struct hostent *h = gethostbyname(host);
|
||||
if (!h)
|
||||
return -ENOENT;
|
||||
|
||||
sock = socket(PF_INET, SOCK_STREAM, 0);
|
||||
if (sock < 0)
|
||||
return -errno;
|
||||
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(port);
|
||||
memcpy(&addr.sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
|
||||
|
||||
if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
||||
return -errno;
|
||||
return sock;
|
||||
}
|
||||
|
||||
/* port == -1 -> PF_LOCAL and host is the socket name */
|
||||
int snd_ctl_client_open(snd_ctl_t **handlep, char *host, int port, int transport, char *name)
|
||||
{
|
||||
snd_ctl_t *ctl;
|
||||
snd_ctl_client_t *client;
|
||||
snd_client_open_request_t *req;
|
||||
snd_client_open_answer_t ans;
|
||||
size_t namelen, reqlen;
|
||||
int err;
|
||||
int result;
|
||||
int fds[2] = {-1, -1};
|
||||
int k;
|
||||
snd_ctl_client_shm_t *ctrl = NULL;
|
||||
uint32_t rcookie, scookie = getpid();
|
||||
namelen = strlen(name);
|
||||
if (namelen > 255)
|
||||
return -EINVAL;
|
||||
|
||||
for (k = 0; k < 2; ++k) {
|
||||
if (port == -1)
|
||||
fds[k] = make_local_socket(host);
|
||||
else
|
||||
fds[k] = make_inet_socket(host, port);
|
||||
if (fds[k] < 0) {
|
||||
result = fds[k];
|
||||
goto _err;
|
||||
}
|
||||
err = write(fds[k], &scookie, sizeof(scookie));
|
||||
if (err != sizeof(scookie)) {
|
||||
result = -EBADFD;
|
||||
goto _err;
|
||||
}
|
||||
err = read(fds[k], &rcookie, sizeof(rcookie));
|
||||
if (err != sizeof(rcookie) ||
|
||||
rcookie != scookie) {
|
||||
result = -EBADFD;
|
||||
goto _err;
|
||||
}
|
||||
}
|
||||
|
||||
reqlen = sizeof(*req) + namelen;
|
||||
req = alloca(reqlen);
|
||||
memcpy(req->name, name, namelen);
|
||||
req->dev_type = SND_DEV_TYPE_CONTROL;
|
||||
req->transport_type = transport;
|
||||
req->stream = 0;
|
||||
req->mode = 0;
|
||||
req->namelen = namelen;
|
||||
err = write(fds[1], req, reqlen);
|
||||
if (err < 0) {
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
if ((size_t) err != reqlen) {
|
||||
result = -EINVAL;
|
||||
goto _err;
|
||||
}
|
||||
err = read(fds[1], &ans, sizeof(ans));
|
||||
if (err < 0) {
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
if (err != sizeof(ans)) {
|
||||
result = -EINVAL;
|
||||
goto _err;
|
||||
}
|
||||
result = ans.result;
|
||||
if (result < 0)
|
||||
goto _err;
|
||||
|
||||
switch (transport) {
|
||||
case SND_TRANSPORT_TYPE_SHM:
|
||||
ctrl = shmat(ans.cookie, 0, 0);
|
||||
if (!ctrl) {
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
result = -ENOSYS;
|
||||
goto _err;
|
||||
}
|
||||
|
||||
ctl = calloc(1, sizeof(snd_ctl_t));
|
||||
if (!ctl) {
|
||||
result = -ENOMEM;
|
||||
goto _err;
|
||||
}
|
||||
client = calloc(1, sizeof(snd_ctl_client_t));
|
||||
if (!ctl) {
|
||||
free(ctl);
|
||||
result = -ENOMEM;
|
||||
goto _err;
|
||||
}
|
||||
|
||||
client->data_fd = fds[0];
|
||||
client->ctrl_fd = fds[1];
|
||||
switch (transport) {
|
||||
case SND_TRANSPORT_TYPE_SHM:
|
||||
client->u.shm.ctrl = ctrl;
|
||||
break;
|
||||
}
|
||||
ctl->type = SND_CTL_TYPE_CLIENT;
|
||||
ctl->ops = &snd_ctl_client_ops;
|
||||
ctl->private = client;
|
||||
INIT_LIST_HEAD(&ctl->hlist);
|
||||
*handlep = ctl;
|
||||
return 0;
|
||||
|
||||
_err:
|
||||
if (fds[0] >= 0)
|
||||
close(fds[0]);
|
||||
if (fds[1] >= 0)
|
||||
close(fds[1]);
|
||||
switch (transport) {
|
||||
case SND_TRANSPORT_TYPE_SHM:
|
||||
if (ctrl)
|
||||
shmdt(ctrl);
|
||||
break;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
|
|
@ -147,7 +147,7 @@ struct snd_ctl_ops snd_ctl_hw_ops = {
|
|||
read: snd_ctl_hw_read,
|
||||
};
|
||||
|
||||
int snd_ctl_hw_open(snd_ctl_t **handle, int card)
|
||||
int snd_ctl_hw_open(snd_ctl_t **handle, char *name, int card)
|
||||
{
|
||||
int fd, ver;
|
||||
char filename[32];
|
||||
|
|
@ -185,6 +185,9 @@ int snd_ctl_hw_open(snd_ctl_t **handle, int card)
|
|||
}
|
||||
hw->card = card;
|
||||
hw->fd = fd;
|
||||
if (name)
|
||||
ctl->name = strdup(name);
|
||||
ctl->type = SND_CTL_TYPE_HW;
|
||||
ctl->ops = &snd_ctl_hw_ops;
|
||||
ctl->private = hw;
|
||||
INIT_LIST_HEAD(&ctl->hlist);
|
||||
|
|
@ -192,3 +195,34 @@ int snd_ctl_hw_open(snd_ctl_t **handle, int card)
|
|||
return 0;
|
||||
}
|
||||
|
||||
int _snd_ctl_hw_open(snd_ctl_t **handlep, char *name, snd_config_t *conf)
|
||||
{
|
||||
snd_config_iterator_t i;
|
||||
long card = -1;
|
||||
char *str;
|
||||
int err;
|
||||
snd_config_foreach(i, conf) {
|
||||
snd_config_t *n = snd_config_entry(i);
|
||||
if (strcmp(n->id, "comment") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "type") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "card") == 0) {
|
||||
err = snd_config_integer_get(n, &card);
|
||||
if (err < 0) {
|
||||
err = snd_config_string_get(n, &str);
|
||||
if (err < 0)
|
||||
return -EINVAL;
|
||||
card = snd_card_get_index(str);
|
||||
if (card < 0)
|
||||
return card;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
return -EINVAL;
|
||||
}
|
||||
if (card < 0)
|
||||
return -EINVAL;
|
||||
return snd_ctl_hw_open(handlep, name, card);
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -40,6 +40,7 @@ struct snd_ctl_ops {
|
|||
|
||||
|
||||
struct snd_ctl {
|
||||
char *name;
|
||||
snd_ctl_type_t type;
|
||||
struct snd_ctl_ops *ops;
|
||||
void *private;
|
||||
|
|
|
|||
512
src/control/control_shm.c
Normal file
512
src/control/control_shm.c
Normal file
|
|
@ -0,0 +1,512 @@
|
|||
/*
|
||||
* Control - SHM Client
|
||||
* Copyright (c) 2000 by Abramo Bagnara <abramo@alsa-project.org>
|
||||
*
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU Library General Public License as
|
||||
* published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Library General Public
|
||||
* License along with this library; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <stddef.h>
|
||||
#include <unistd.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <sys/shm.h>
|
||||
#include <sys/socket.h>
|
||||
#include <sys/poll.h>
|
||||
#include <sys/un.h>
|
||||
#include <sys/uio.h>
|
||||
#include <sys/mman.h>
|
||||
#include <netinet/in.h>
|
||||
#include <netdb.h>
|
||||
#include "control_local.h"
|
||||
#include "aserver.h"
|
||||
|
||||
typedef struct {
|
||||
int socket;
|
||||
void *ctrl;
|
||||
} snd_ctl_shm_t;
|
||||
|
||||
extern int receive_fd(int socket, void *data, size_t len, int *fd);
|
||||
|
||||
static int snd_ctl_shm_action(snd_ctl_t *ctl)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
int err;
|
||||
char buf[1];
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
err = write(shm->socket, buf, 1);
|
||||
if (err != 1)
|
||||
return -EBADFD;
|
||||
err = read(shm->socket, buf, 1);
|
||||
if (err != 1)
|
||||
return -EBADFD;
|
||||
if (ctrl->cmd) {
|
||||
fprintf(stderr, "Server has not done the cmd\n");
|
||||
return -EBADFD;
|
||||
}
|
||||
return ctrl->result;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_action_fd(snd_ctl_t *ctl, int *fd)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
int err;
|
||||
char buf[1];
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
err = write(shm->socket, buf, 1);
|
||||
if (err != 1)
|
||||
return -EBADFD;
|
||||
err = receive_fd(shm->socket, buf, 1, fd);
|
||||
if (err != 1)
|
||||
return -EBADFD;
|
||||
if (ctrl->cmd) {
|
||||
fprintf(stderr, "Server has not done the cmd\n");
|
||||
return -EBADFD;
|
||||
}
|
||||
return ctrl->result;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_close(snd_ctl_t *ctl)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int result;
|
||||
ctrl->cmd = SND_CTL_IOCTL_CLOSE;
|
||||
result = snd_ctl_shm_action(ctl);
|
||||
shmdt((void *)ctrl);
|
||||
close(shm->socket);
|
||||
free(shm);
|
||||
return result;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_poll_descriptor(snd_ctl_t *ctl)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int fd, err;
|
||||
ctrl->cmd = SND_CTL_IOCTL_POLL_DESCRIPTOR;
|
||||
err = snd_ctl_shm_action_fd(ctl, &fd);
|
||||
if (err < 0)
|
||||
return err;
|
||||
return fd;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_hw_info(snd_ctl_t *ctl, snd_ctl_hw_info_t *info)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
// ctrl->u.hw_info = *info;
|
||||
ctrl->cmd = SND_CTL_IOCTL_HW_INFO;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*info = ctrl->u.hw_info;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_clist(snd_ctl_t *ctl, snd_control_list_t *list)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
size_t maxsize = CTL_SHM_DATA_MAXLEN;
|
||||
size_t bytes = list->controls_request * sizeof(*list->pids);
|
||||
int err;
|
||||
snd_control_id_t *pids = list->pids;
|
||||
if (bytes > maxsize)
|
||||
return -EINVAL;
|
||||
ctrl->u.clist = *list;
|
||||
ctrl->cmd = SND_CTL_IOCTL_CONTROL_LIST;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*list = ctrl->u.clist;
|
||||
list->pids = pids;
|
||||
memcpy(pids, ctrl->data, bytes);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_cinfo(snd_ctl_t *ctl, snd_control_info_t *info)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.cinfo = *info;
|
||||
ctrl->cmd = SND_CTL_IOCTL_CONTROL_INFO;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*info = ctrl->u.cinfo;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_cread(snd_ctl_t *ctl, snd_control_t *control)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.cread = *control;
|
||||
ctrl->cmd = SND_CTL_IOCTL_CONTROL_READ;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*control = ctrl->u.cread;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_cwrite(snd_ctl_t *ctl, snd_control_t *control)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.cwrite = *control;
|
||||
ctrl->cmd = SND_CTL_IOCTL_CONTROL_WRITE;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*control = ctrl->u.cwrite;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.hwdep_info = *info;
|
||||
ctrl->cmd = SND_CTL_IOCTL_HWDEP_INFO;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*info = ctrl->u.hwdep_info;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.pcm_info = *info;
|
||||
ctrl->cmd = SND_CTL_IOCTL_PCM_INFO;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*info = ctrl->u.pcm_info;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.pcm_prefer_subdevice = subdev;
|
||||
ctrl->cmd = SND_CTL_IOCTL_PCM_PREFER_SUBDEVICE;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.rawmidi_info = *info;
|
||||
ctrl->cmd = SND_CTL_IOCTL_RAWMIDI_INFO;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*info = ctrl->u.rawmidi_info;
|
||||
return err;
|
||||
}
|
||||
|
||||
static int snd_ctl_shm_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
|
||||
{
|
||||
snd_ctl_shm_t *shm = ctl->private;
|
||||
snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
|
||||
int err;
|
||||
ctrl->u.read = *event;
|
||||
ctrl->cmd = SND_CTL_IOCTL_READ;
|
||||
err = snd_ctl_shm_action(ctl);
|
||||
if (err < 0)
|
||||
return err;
|
||||
*event = ctrl->u.read;
|
||||
return err;
|
||||
}
|
||||
|
||||
struct snd_ctl_ops snd_ctl_shm_ops = {
|
||||
close: snd_ctl_shm_close,
|
||||
poll_descriptor: snd_ctl_shm_poll_descriptor,
|
||||
hw_info: snd_ctl_shm_hw_info,
|
||||
clist: snd_ctl_shm_clist,
|
||||
cinfo: snd_ctl_shm_cinfo,
|
||||
cread: snd_ctl_shm_cread,
|
||||
cwrite: snd_ctl_shm_cwrite,
|
||||
hwdep_info: snd_ctl_shm_hwdep_info,
|
||||
pcm_info: snd_ctl_shm_pcm_info,
|
||||
pcm_prefer_subdevice: snd_ctl_shm_pcm_prefer_subdevice,
|
||||
rawmidi_info: snd_ctl_shm_rawmidi_info,
|
||||
read: snd_ctl_shm_read,
|
||||
};
|
||||
|
||||
static int make_local_socket(const char *filename)
|
||||
{
|
||||
size_t l = strlen(filename);
|
||||
size_t size = offsetof(struct sockaddr_un, sun_path) + l;
|
||||
struct sockaddr_un *addr = alloca(size);
|
||||
int sock;
|
||||
|
||||
sock = socket(PF_LOCAL, SOCK_STREAM, 0);
|
||||
if (sock < 0)
|
||||
return -errno;
|
||||
|
||||
addr->sun_family = AF_LOCAL;
|
||||
memcpy(addr->sun_path, filename, l);
|
||||
|
||||
if (connect(sock, (struct sockaddr *) addr, size) < 0)
|
||||
return -errno;
|
||||
return sock;
|
||||
}
|
||||
|
||||
#if 0
|
||||
static int make_inet_socket(const char *host, int port)
|
||||
{
|
||||
struct sockaddr_in addr;
|
||||
int sock;
|
||||
struct hostent *h = gethostbyname(host);
|
||||
if (!h)
|
||||
return -ENOENT;
|
||||
|
||||
sock = socket(PF_INET, SOCK_STREAM, 0);
|
||||
if (sock < 0)
|
||||
return -errno;
|
||||
|
||||
addr.sin_family = AF_INET;
|
||||
addr.sin_port = htons(port);
|
||||
memcpy(&addr.sin_addr, h->h_addr_list[0], sizeof(struct in_addr));
|
||||
|
||||
if (connect(sock, (struct sockaddr *) &addr, sizeof(addr)) < 0)
|
||||
return -errno;
|
||||
return sock;
|
||||
}
|
||||
#endif
|
||||
|
||||
int snd_ctl_shm_open(snd_ctl_t **handlep, char *name, char *socket, char *sname)
|
||||
{
|
||||
snd_ctl_t *ctl;
|
||||
snd_ctl_shm_t *shm = NULL;
|
||||
snd_client_open_request_t *req;
|
||||
snd_client_open_answer_t ans;
|
||||
size_t snamelen, reqlen;
|
||||
int err;
|
||||
int result;
|
||||
int sock = -1;
|
||||
snd_ctl_shm_ctrl_t *ctrl = NULL;
|
||||
snamelen = strlen(sname);
|
||||
if (snamelen > 255)
|
||||
return -EINVAL;
|
||||
|
||||
result = make_local_socket(socket);
|
||||
if (result < 0) {
|
||||
ERR("server for socket %s is not running", socket);
|
||||
goto _err;
|
||||
}
|
||||
sock = result;
|
||||
|
||||
reqlen = sizeof(*req) + snamelen;
|
||||
req = alloca(reqlen);
|
||||
memcpy(req->name, sname, snamelen);
|
||||
req->dev_type = SND_DEV_TYPE_CONTROL;
|
||||
req->transport_type = SND_TRANSPORT_TYPE_SHM;
|
||||
req->stream = 0;
|
||||
req->mode = 0;
|
||||
req->namelen = snamelen;
|
||||
err = write(sock, req, reqlen);
|
||||
if (err < 0) {
|
||||
ERR("write error");
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
if ((size_t) err != reqlen) {
|
||||
ERR("write size error");
|
||||
result = -EINVAL;
|
||||
goto _err;
|
||||
}
|
||||
err = read(sock, &ans, sizeof(ans));
|
||||
if (err < 0) {
|
||||
ERR("read error");
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
if (err != sizeof(ans)) {
|
||||
ERR("read size error");
|
||||
result = -EINVAL;
|
||||
goto _err;
|
||||
}
|
||||
result = ans.result;
|
||||
if (result < 0)
|
||||
goto _err;
|
||||
|
||||
ctrl = shmat(ans.cookie, 0, 0);
|
||||
if (!ctrl) {
|
||||
result = -errno;
|
||||
goto _err;
|
||||
}
|
||||
|
||||
ctl = calloc(1, sizeof(snd_ctl_t));
|
||||
if (!ctl) {
|
||||
result = -ENOMEM;
|
||||
goto _err;
|
||||
}
|
||||
shm = calloc(1, sizeof(snd_ctl_shm_t));
|
||||
if (!ctl) {
|
||||
free(ctl);
|
||||
result = -ENOMEM;
|
||||
goto _err;
|
||||
}
|
||||
|
||||
shm->socket = sock;
|
||||
shm->ctrl = ctrl;
|
||||
|
||||
if (name)
|
||||
ctl->name = strdup(name);
|
||||
ctl->type = SND_CTL_TYPE_SHM;
|
||||
ctl->ops = &snd_ctl_shm_ops;
|
||||
ctl->private = shm;
|
||||
INIT_LIST_HEAD(&ctl->hlist);
|
||||
*handlep = ctl;
|
||||
return 0;
|
||||
|
||||
_err:
|
||||
close(sock);
|
||||
if (ctrl)
|
||||
shmdt(ctrl);
|
||||
if (shm)
|
||||
free(shm);
|
||||
return result;
|
||||
}
|
||||
|
||||
extern int is_local(struct hostent *hent);
|
||||
|
||||
int _snd_ctl_shm_open(snd_ctl_t **handlep, char *name, snd_config_t *conf)
|
||||
{
|
||||
snd_config_iterator_t i;
|
||||
char *server = NULL;
|
||||
char *sname = NULL;
|
||||
snd_config_t *sconfig;
|
||||
char *host = NULL;
|
||||
char *socket = NULL;
|
||||
long port = -1;
|
||||
int err;
|
||||
int local;
|
||||
struct hostent *h;
|
||||
snd_config_foreach(i, conf) {
|
||||
snd_config_t *n = snd_config_entry(i);
|
||||
if (strcmp(n->id, "comment") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "type") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "server") == 0) {
|
||||
err = snd_config_string_get(n, &server);
|
||||
if (err < 0) {
|
||||
ERR("Invalid type for server");
|
||||
return -EINVAL;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if (strcmp(n->id, "sname") == 0) {
|
||||
err = snd_config_string_get(n, &sname);
|
||||
if (err < 0) {
|
||||
ERR("Invalid type for sname");
|
||||
return -EINVAL;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
ERR("Unknown field: %s", n->id);
|
||||
return -EINVAL;
|
||||
}
|
||||
if (!sname) {
|
||||
ERR("sname is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (!server) {
|
||||
ERR("server is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
err = snd_config_searchv(snd_config, &sconfig, "server", server, 0);
|
||||
if (err < 0) {
|
||||
ERR("Unknown server %s", server);
|
||||
return -EINVAL;
|
||||
}
|
||||
snd_config_foreach(i, conf) {
|
||||
snd_config_t *n = snd_config_entry(i);
|
||||
if (strcmp(n->id, "comment") == 0)
|
||||
continue;
|
||||
if (strcmp(n->id, "host") == 0) {
|
||||
err = snd_config_string_get(n, &host);
|
||||
if (err < 0) {
|
||||
ERR("Invalid type for host");
|
||||
return -EINVAL;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if (strcmp(n->id, "socket") == 0) {
|
||||
err = snd_config_string_get(n, &socket);
|
||||
if (err < 0) {
|
||||
ERR("Invalid type for socket");
|
||||
return -EINVAL;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
if (strcmp(n->id, "port") == 0) {
|
||||
err = snd_config_integer_get(n, &port);
|
||||
if (err < 0) {
|
||||
ERR("Invalid type for port");
|
||||
return -EINVAL;
|
||||
}
|
||||
continue;
|
||||
}
|
||||
ERR("Unknown field: %s", n->id);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (!host) {
|
||||
ERR("host is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
if (!socket) {
|
||||
ERR("socket is not defined");
|
||||
return -EINVAL;
|
||||
}
|
||||
h = gethostbyname(host);
|
||||
if (!h) {
|
||||
ERR("Cannot resolve %s", host);
|
||||
return -EINVAL;
|
||||
}
|
||||
local = is_local(h);
|
||||
if (!local) {
|
||||
ERR("%s is not the local host", host);
|
||||
return -EINVAL;
|
||||
}
|
||||
return snd_ctl_shm_open(handlep, name, socket, sname);
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue