diff options
Diffstat (limited to 'Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c')
| -rw-r--r-- | Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c | 423 |
1 files changed, 0 insertions, 423 deletions
diff --git a/Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c b/Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c deleted file mode 100644 index 22c217b..0000000 --- a/Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c +++ /dev/null @@ -1,423 +0,0 @@ -/* - * Copyright (C) 2016 "IoT.bzh" - * Author Fulup Ar Foll <fulup@iot.bzh> - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - * Testing: - * 1) Copy generated plugin [libasound_module_pcm_afbhal.so] in alsa-lib/ dir visible from LD_LIBRARY_PATH (eg: /usr/lib64/alsa-lib) - * 2) Create a ~/.asounrc file base on following template - * ctl.agl_hal { - * type afbhal - * devid "hw:4" - * cblib "afbhal_cb_sample.so" - * ctls { - * # ctlLabel {numid integer name "Alsa Ctl Name"} - * MasterSwitch { numid 4 name "My_First_Control" } - * MasterVol { numid 5 name "My_Second_Control" } - * CB_sample { ctlcb @AfbHalSampleCB name "My_Sample_Callback"} - * } - * pcm.agl_hal { - * type copy # Copy PCM - * slave "hw:4" # Slave name - * } - * - * } - * 3) Test with - * - amixer -Dagl_hal controls # should list all your controls - * - amixer -Dagl_hal cget numid=1 - * - amixer -Dagl_hal cset numid=1 '10,20' - */ - - -#include <stdio.h> -#include <sys/ioctl.h> -#include "AlsaHalPlug.h" -#include <dlfcn.h> - -static snd_ctl_ext_key_t AfbHalElemFind(snd_ctl_ext_t *ext, const snd_ctl_elem_id_t *id) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_ext_key_t key = NULL; - - int numid = snd_ctl_elem_id_get_numid(id); - if (numid > 0) { - if (numid > plughandle->ctlsCount) goto OnErrorExit; - key = (snd_ctl_ext_key_t) numid - 1; - goto SucessExit; - } - - const char *ctlName = snd_ctl_elem_id_get_name(id); - if (ctlName == NULL) goto OnErrorExit; - - for (int idx = 0; idx < plughandle->ctlsCount; idx++) { - if (!strcmp(ctlName, plughandle->ctls[idx].ctlName)) { - key = idx; - goto SucessExit; - } - } - -SucessExit: - return key; - -OnErrorExit: - return -1; -} - -static int AfbHalGetAttrib(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int *type, unsigned int *acc, unsigned int *count) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_elem_info_t *elemInfo = plughandle->infos[key]; - snd_ctl_cb_t callback = plughandle->cbs[key]; - - - // search for equivalent NUMID in effective sound card - if (elemInfo) { - *type = snd_ctl_elem_info_get_type(elemInfo); - *count = snd_ctl_elem_info_get_count(elemInfo); - *acc = SND_CTL_EXT_ACCESS_READWRITE; // Future ToBeDone - return 0; - } - - if (callback) { - snd_ctl_get_attrib_t item; - - int err = callback(plughandle, CTLCB_GET_ATTRIBUTE, key, &item); - if (!err) { - *type = item.type; - *acc = item.acc; - *count = item.count; - } - return err; - } - - return -1; -} - -static int AfbHalGetIntInfo(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *imin, long *imax, long *istep) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_elem_info_t *elemInfo = plughandle->infos[key]; - snd_ctl_cb_t callback = plughandle->cbs[key]; - - if (elemInfo) { - - // Should be normalised to make everything 0-100% - *imin = (long) snd_ctl_elem_info_get_min(elemInfo); - *imax = (long) snd_ctl_elem_info_get_min(elemInfo); - *istep = (long) snd_ctl_elem_info_get_min(elemInfo); - return 0; - } - - if (callback) { - snd_ctl_get_int_info_t item; - - int err = callback(plughandle, CTLCB_GET_INTEGER_INFO, key, &item); - if (!err) { - *imin = item.imin; - *imax = item.imax; - *istep = item.istep; - } - return err; - } - - return -1; -} - -static int AfbHalGetEnumInfo(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_elem_info_t *elemInfo = plughandle->infos[key]; - snd_ctl_cb_t callback = plughandle->cbs[key]; - - if (elemInfo) *items = snd_ctl_elem_info_get_items(elemInfo); - if (callback) callback(plughandle, CTLCB_GET_ENUMERATED_INFO, key, items); - - return 0; -} - -static int AfbHalGetEnumName(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int item, char *name, size_t name_max_len) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_elem_info_t *elemInfo = plughandle->infos[key]; - - //name= snd_ctl_elem_info_get_item_name(elemInfo); - return 0; -} - -static int AfbHalReadInt(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - snd_ctl_elem_info_t *elemInfo = plughandle->infos[key]; - - return 0; -} - -static int AfbHalReadEnumerate(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - - return 0; -} - -static int AfbHalWriteInt(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - - return 0; -} - -static int AfbHalWriteEnum(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - - return 0; -} - -static int AfbHalEventRead(snd_ctl_ext_t *ext, snd_ctl_elem_id_t *id, unsigned int *event_mask) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - - return -EAGAIN; -} - -static int AfbHalElemList(snd_ctl_ext_t *ext, unsigned int offset, snd_ctl_elem_id_t *id) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - - snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); - snd_ctl_elem_id_set_name(id, plughandle->ctls[offset].ctlName); - - return 0; -} - -static int AfbHalElemCount(snd_ctl_ext_t *ext) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - int count = plughandle->ctlsCount; - return count; -} - -static void AfbHalClose(snd_ctl_ext_t *ext) { - snd_ctl_hal_t *plughandle = (snd_ctl_hal_t*) ext->private_data; - int err; - - for (int idx = 0; idx < plughandle->ctlsCount; idx++) { - if (plughandle->ctls[idx].ctlName) free((void*) plughandle->ctls[idx].ctlName); - } - - err = snd_ctl_close(plughandle->ctlDev); - if (err) SNDERR("Fail Close sndctl: devid=%s err=%s", plughandle->devid, snd_strerror(err)); - - if (plughandle->devid) free(plughandle->devid); - free(plughandle); -} - -static snd_ctl_ext_callback_t afbHalCBs = { - .close = AfbHalClose, - .elem_count = AfbHalElemCount, - .elem_list = AfbHalElemList, - .find_elem = AfbHalElemFind, - .get_attribute = AfbHalGetAttrib, - .get_integer_info = AfbHalGetIntInfo, - .get_enumerated_info = AfbHalGetEnumInfo, - .get_enumerated_name = AfbHalGetEnumName, - .read_integer = AfbHalReadInt, - .read_enumerated = AfbHalReadEnumerate, - .write_integer = AfbHalWriteInt, - .write_enumerated = AfbHalWriteEnum, - .read_event = AfbHalEventRead, -}; - -SND_CTL_PLUGIN_DEFINE_FUNC(afbhal) { - - snd_config_iterator_t it, next; - snd_ctl_hal_t *plughandle; - int err; - snd_ctl_cb_t AfbHalInitCB; - const char *libname; - - plughandle = calloc(1, sizeof (snd_ctl_hal_t)); - - snd_config_for_each(it, next, conf) { - snd_config_t *node = snd_config_iterator_entry(it); - const char *id; - - // ignore comment en empty lines - if (snd_config_get_id(node, &id) < 0) continue; - if (strcmp(id, "comment") == 0 || strcmp(id, "type") == 0 || strcmp(id, "hint") == 0) continue; - - // devid should point onto a valid sound card - if (strcmp(id, "devid") == 0) { - const char *devid; - if (snd_config_get_string(node, &devid) < 0) { - SNDERR("Invalid string type for %s", id); - return -EINVAL; - } - plughandle->devid = strdup(devid); - - // open control interface for devid - err = snd_ctl_open(&plughandle->ctlDev, plughandle->devid, 0); - if (err < 0) { - SNDERR("Fail to open control device for devid=%s", plughandle->devid); - return -EINVAL; - } - continue; - } - - if (strcmp(id, "cblib") == 0) { - if (snd_config_get_string(node, &libname) < 0) { - SNDERR("Invalid libname string for %s", id); - return -EINVAL; - } - - plughandle->dlHandle = dlopen(libname, RTLD_NOW); - if (!plughandle->dlHandle) { - SNDERR("Fail to open callback sharelib=%s error=%s", libname, dlerror()); - return -EINVAL; - } - - AfbHalInitCB = dlsym(plughandle->dlHandle, "AfbHalInitCB"); - if (!AfbHalInitCB) { - SNDERR("Fail find 'AfbHalInitCB' symbol into callbacks sharelib=%s", libname); - return -EINVAL; - } - - err = (*AfbHalInitCB)(plughandle, CTLCB_INIT, 0, 0); - if (err) { - SNDERR("Fail AfbHalInitCB err=%d", err); - return -EINVAL; - } - - continue; - } - - if (strcmp(id, "ctl") == 0) { - const char *ctlConf; - snd_config_type_t ctype; - snd_config_iterator_t currentCtl, follow; - snd_config_t *itemConf; - - ctype = snd_config_get_type(node); - if (ctype != SND_CONFIG_TYPE_COMPOUND) { - snd_config_get_string(node, &ctlConf); - SNDERR("Invalid compound type for %s", node); - return -EINVAL; - } - - // loop on each ctl within ctls - - snd_config_for_each(currentCtl, follow, node) { - snd_config_t *ctlconfig = snd_config_iterator_entry(currentCtl); - snd_ctl_elem_info_t *elemInfo; - const char *ctlLabel, *ctlName; - - // ignore empty line - if (snd_config_get_id(ctlconfig, &ctlLabel) < 0) continue; - - // each clt should be a valid config compound - ctype = snd_config_get_type(ctlconfig); - if (ctype != SND_CONFIG_TYPE_COMPOUND) { - snd_config_get_string(node, &ctlConf); - SNDERR("Invalid ctl config for %s", ctlLabel); - return -EINVAL; - } - - err = snd_config_search(ctlconfig, "ctl", &itemConf); - if (!err) { - if (snd_config_get_integer(itemConf, (long*) &plughandle->ctls[plughandle->ctlsCount].ctlNumid) < 0) { - SNDERR("Not Integer: ctl:%s numid should be a valid integer", ctlLabel); - return -EINVAL; - } - - // Make sure than numid is valid on slave snd card - snd_ctl_elem_info_malloc(&elemInfo); - snd_ctl_elem_info_set_numid(elemInfo, (int) plughandle->ctls[plughandle->ctlsCount].ctlNumid); - plughandle->infos[plughandle->ctlsCount] = elemInfo; - - err = snd_ctl_elem_info(plughandle->ctlDev, elemInfo); - if (err) { - SNDERR("Not Found: 'numid=%d' for 'devid=%s'", plughandle->ctls[plughandle->ctlsCount].ctlNumid, plughandle->devid); - return -EINVAL; - } - } - - err = snd_config_search(ctlconfig, "ctlcb", &itemConf); - if (!err) { - const char *funcname; - void *funcaddr; - - if (snd_config_get_string(itemConf, &funcname) < 0) { - SNDERR("Not string: ctl:%s cbname should be a valid string", ctlLabel); - return -EINVAL; - } - - if (funcname[0] != '@') { - SNDERR("Not string: ctl:%s cbname=%s should be prefixed with '@' ", ctlLabel, funcname); - return -EINVAL; - } - - if (!plughandle->dlHandle) { - SNDERR("No CB: ctl:%s cblib:/my/libcallback missing from asoundrc", ctlLabel); - return -EINVAL; - } - - funcaddr = dlsym(plughandle->dlHandle, &funcname[1]); - if (!funcaddr) { - SNDERR("NotFound CB: ctl:%s cbname='%s' no symbol into %s", ctlLabel, &funcname[1], libname); - return -EINVAL; - } - plughandle->cbs[plughandle->ctlsCount] = funcaddr; - } - - err = snd_config_search(ctlconfig, "name", &itemConf); - if (err) { - SNDERR("Not Found: 'name' mandatory in ctl config"); - return -EINVAL; - } - - if (snd_config_get_string(itemConf, &ctlName) < 0) { - SNDERR("Not String: ctl:%s 'name' should be a valie string", ctlLabel); - return -EINVAL; - } - plughandle->ctls[plughandle->ctlsCount].ctlName = strdup(ctlName); - - // move to next ctl if any - plughandle->ctlsCount++; - } // end for each ctl - continue; - } - SNDERR("Unknown field %s", id); - return -EINVAL; - } - - - - // Create ALSA control plugin structure - plughandle->ext.version = SND_CTL_EXT_VERSION; - plughandle->ext.card_idx = 0; /* FIXME */ - strcpy(plughandle->ext.id, "AFB-HAL-CTL"); - strcpy(plughandle->ext.driver, "AFB-HAL"); - strcpy(plughandle->ext.name, "AFB-HAL Control Plugin"); - strcpy(plughandle->ext.mixername, "AFB-HAL Mixer Plugin"); - strcpy(plughandle->ext.longname, "Automotive-Linux Sound Abstraction Control Plugin"); - plughandle->ext.poll_fd = -1; - plughandle->ext.callback = &afbHalCBs; - plughandle->ext.private_data = (void*) plughandle; - - - - err = snd_ctl_ext_create(&plughandle->ext, name, mode); - if (err < 0) { - SNDERR("Fail Register sndctl for devid=%s", plughandle->devid); - goto OnErrorExit; - } - - // Plugin register controls update handlep before exiting - *handlep = plughandle->ext.handle; - return 0; - -OnErrorExit: - free(plughandle); - return -1; -} - -SND_CTL_PLUGIN_SYMBOL(afbhal); |