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authorFulup Ar Foll <fulup@iot.bzh>2017-10-24 22:11:21 +0200
committerFulup Ar Foll <fulup@iot.bzh>2017-10-24 22:11:21 +0200
commit036268ddd8c62114faf9afd4da3c35ffa2b6ecba (patch)
tree72429524bb9e4be47b760915a674e6473e305026 /Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c
parent2fd0fa8c77dbaaf40ba0812e43b6637ff1d1d76e (diff)
Initial working version as independent repo
Diffstat (limited to 'Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c')
-rw-r--r--Alsa-Plugin/_Alsa-Hal-plugin/AlsaHalPlugCtl.c423
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);