Extracted from Global afb-audio repo

1 files changed, 0 insertions, 399 deletions

diff --git a/Alsa-afb/Alsa-AddCtl.c b/Alsa-afb/Alsa-AddCtl.c
deleted file mode 100644
index aaa9347..0000000
--- a/Alsa-afb/Alsa-AddCtl.c
+++ /dev/null
@@ -1,399 +0,0 @@
-/*
- * AlsaUseCase -- provide low level interface with ALSA lib (extracted from alsa-json-gateway code)
- * Copyright (C) 2015,2016,2017, 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.
- *
- * References:
- *  https://kernel.readthedocs.io/en/sphinx-samples/writing-an-alsa-driver.html#control-names
- *  https://01.org/linuxgraphics/gfx-docs/drm/sound/designs/control-names.html
-
- */
-#define _GNU_SOURCE  // needed for vasprintf
-
-#include <alsa/asoundlib.h>
-#include <alsa/sound/tlv.h>
-#include <systemd/sd-event.h>
-#include <sys/ioctl.h>
-
-#include "Alsa-ApiHat.h"
-
-// Performs like a toggle switch for attenuation, because they're bool (ref:user-ctl-element-set.c)
-
-#ifndef SNDRV_CTL_TLVD_DECLARE_DB_MINMAX
-// taken from alsa-lib-1.1.3:include/sound/tlv.h
-
-#define SNDRV_CTL_TLVD_LENGTH(...) \
-    ((unsigned int)sizeof((const unsigned int[]) { __VA_ARGS__ }))
-
-#define SNDRV_CTL_TLVD_ITEM(type, ...) \
-    (type), SNDRV_CTL_TLVD_LENGTH(__VA_ARGS__), __VA_ARGS__
-
-#define SNDRV_CTL_TLVT_DB_MINMAX 4
-
-#define SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
-    SNDRV_CTL_TLVD_ITEM(SNDRV_CTL_TLVT_DB_MINMAX, (min_dB), (max_dB))
-
-#define SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(name, min_dB, max_dB) \
-    unsigned int name[] = { \
-        SNDRV_CTL_TLVD_DB_MINMAX_ITEM(min_dB, max_dB) \
-    }
-
-#define SNDRV_CTL_TLVD_DB_SCALE_MASK    0xffff
-#define SNDRV_CTL_TLVD_DB_SCALE_MUTE    0x10000
-
-#endif
-static const unsigned int *allocate_bool_fake_tlv(void) {
-    static const SNDRV_CTL_TLVD_DECLARE_DB_MINMAX(range, -10000, 0);
-    unsigned int *tlv = malloc(sizeof (range));
-    if (tlv == NULL) return NULL;
-    memcpy(tlv, range, sizeof (range));
-    return tlv;
-}
-
-static const unsigned int *allocate_int_dbscale_tlv(int min, int step, int mute) {
-    // SNDRV_CTL_TLVD_DECLARE_DB_SCALE(range, min, step, mute);
-    size_t tlvSize = sizeof (4 * sizeof (unsigned int));
-    unsigned int *tlv = malloc(tlvSize);
-    tlv[0] = SNDRV_CTL_TLVT_DB_LINEAR;
-    tlv[1] = (int) tlvSize;
-    tlv[2] = min * 100;
-    tlv[3] = ((step * 100) & SNDRV_CTL_TLVD_DB_SCALE_MASK) | ((mute * 100) ? SNDRV_CTL_TLVD_DB_SCALE_MUTE : 0);
-    return tlv;
-}
-
-static const unsigned int *allocate_int_linear_tlv(int max, int min) {
-    // SNDRV_CTL_TLVD_DECLARE_DB_LINEAR (range, min, max);
-    size_t tlvSize = sizeof (4 * sizeof (unsigned int));
-    unsigned int *tlv = malloc(tlvSize);
-    tlv[0] = SNDRV_CTL_TLVT_DB_LINEAR;
-    tlv[1] = (int) tlvSize;
-    tlv[2] = -min * 100;
-    tlv[3] = max * 100;
-    return tlv;
-}
-
-STATIC json_object * addOneSndCtl(afb_req request, snd_ctl_t *ctlDev, json_object *ctlJ, halQueryMode queryMode) {
-    int err, done, ctlNumid, ctlValue=0, shouldCreate;
-    json_object *tmpJ;
-    const char *ctlName;
-    ctlRequestT ctlRequest;
-    int ctlMax=100, ctlMin=0, ctlStep, ctlCount, ctlSubDev=0, ctlSndDev=0;
-    snd_ctl_elem_type_t ctlType=SND_CTL_ELEM_TYPE_NONE;
-    snd_ctl_elem_info_t *elemInfo;
-    snd_ctl_elem_id_t *elemId;
-    snd_ctl_elem_value_t *elemValue;
-    const unsigned int *elemTlv = NULL;
-
-    // parse json ctl object
-    json_object_object_get_ex(ctlJ, "name", &tmpJ);
-    ctlName = json_object_get_string(tmpJ);
-
-    json_object_object_get_ex(ctlJ, "ctl", &tmpJ);
-    ctlNumid = json_object_get_int(tmpJ);
-
-    if (!ctlNumid && !ctlName) {
-        afb_req_fail_f(request, "ctl-invalid", "crl=%s name or numid missing", json_object_get_string(ctlJ));
-        goto OnErrorExit;
-    }
-
-
-    // We are facing a software ctl
-    if (ctlNumid == CTL_AUTO) {
-        done = json_object_object_get_ex(ctlJ, "type", &tmpJ);
-        if (done) ctlType = json_object_get_int(tmpJ);
-        else ctlType = SND_CTL_ELEM_TYPE_INTEGER;
-
-        json_object_object_get_ex(ctlJ, "val", &tmpJ);
-        ctlValue = json_object_get_int(tmpJ);
-
-        // default for json_object_get_int is zero
-        json_object_object_get_ex(ctlJ, "min", &tmpJ);
-        ctlMin = json_object_get_int(tmpJ);
-
-        done = json_object_object_get_ex(ctlJ, "max", &tmpJ);
-        if (done) ctlMax = json_object_get_int(tmpJ);
-        else {
-            if (ctlType == SND_CTL_ELEM_TYPE_BOOLEAN) ctlMax = 1;
-            else ctlMax = 100;
-        }
-
-        done = json_object_object_get_ex(ctlJ, "step", &tmpJ);
-        if (!done) ctlStep = 1;
-        else ctlStep = json_object_get_int(tmpJ);
-
-        done = json_object_object_get_ex(ctlJ, "count", &tmpJ);
-        if (!done) ctlCount = 1;
-        else ctlCount = json_object_get_int(tmpJ);
-
-        json_object_object_get_ex(ctlJ, "snddev", &tmpJ);
-        ctlSndDev = json_object_get_int(tmpJ);
-
-        json_object_object_get_ex(ctlJ, "subdev", &tmpJ);
-        ctlSubDev = json_object_get_int(tmpJ);
-    }
-
-    // Assert that this ctls is not used
-    snd_ctl_elem_info_alloca(&elemInfo);
-    if (ctlName) snd_ctl_elem_info_set_name(elemInfo, ctlName);
-    if (ctlNumid > 0)snd_ctl_elem_info_set_numid(elemInfo, ctlNumid);
-    snd_ctl_elem_info_set_interface(elemInfo, SND_CTL_ELEM_IFACE_MIXER);
-
-    // If control exist try to reuse it
-    err = snd_ctl_elem_info(ctlDev, elemInfo);
-    if (err) {
-        shouldCreate = 1;
-    } else {
-        int count, min, max, sndDev, subDev;
-        snd_ctl_elem_type_t type;
-
-        // ctl exit let's get associated elemID
-        snd_ctl_elem_id_alloca(&elemId);
-        snd_ctl_elem_info_get_id(elemInfo, elemId);
-
-        // If this is a hardware ctl only update value
-        if (ctlNumid != CTL_AUTO) {
-            json_object_object_get_ex(ctlJ, "val", &tmpJ);
-            ctlValue = json_object_get_int(tmpJ);
-            goto UpdateDefaultVal;
-        }
-
-        count = snd_ctl_elem_info_get_count(elemInfo);
-        min = (int) snd_ctl_elem_info_get_min(elemInfo);
-        max = (int) snd_ctl_elem_info_get_max(elemInfo);
-        type = snd_ctl_elem_info_get_type(elemInfo);
-        sndDev = (int) snd_ctl_elem_info_get_device(elemInfo);
-        subDev = (int) snd_ctl_elem_info_get_subdevice(elemInfo);
-
-        if (count == ctlCount && min == ctlMin && max == ctlMax && type == ctlType && sndDev == ctlSndDev && subDev == ctlSubDev) {
-            // Adjust value to best fit request
-            shouldCreate = 0;
-        } else {
-            err = snd_ctl_elem_remove(ctlDev, elemId);
-            shouldCreate = 1;
-            if (err < 0) {
-                AFB_ERROR("addOneSndCtl: ctlName=%s numid=%d fail to reset", snd_ctl_elem_info_get_name(elemInfo), snd_ctl_elem_info_get_numid(elemInfo));
-                goto DoNotUpdate;
-            };
-
-            // Control was deleted need to refresh elemInfo
-            snd_ctl_elem_info_alloca(&elemInfo);
-            if (ctlName) snd_ctl_elem_info_set_name(elemInfo, ctlName);
-            snd_ctl_elem_info_set_interface(elemInfo, SND_CTL_ELEM_IFACE_MIXER);
-            snd_ctl_elem_info(ctlDev, elemInfo);
-        }
-    }
-
-    // Add requested ID into elemInfo
-    snd_ctl_elem_info_set_device(elemInfo, ctlSndDev);
-    snd_ctl_elem_info_set_subdevice(elemInfo, ctlSubDev);
-
-    switch (ctlType) {
-        case SND_CTL_ELEM_TYPE_BOOLEAN:
-            if (shouldCreate) {
-                err = snd_ctl_add_boolean_elem_set(ctlDev, elemInfo, 1, ctlCount);
-                if (err) {
-                    AFB_ERROR("AddOntSndCtl Boolean: devid='%s' name='%s' count=%d", snd_ctl_name(ctlDev), ctlName, ctlCount);
-                    afb_req_fail_f(request, "ctl-invalid-bool", "devid='%s' name='%s' count=%d", snd_ctl_name(ctlDev), ctlName, ctlCount);
-                    goto OnErrorExit;
-                }
-            }
-
-            // Create a dummy TLV
-            elemTlv = allocate_bool_fake_tlv();
-
-            break;
-
-        case SND_CTL_ELEM_TYPE_INTEGER:
-            if (shouldCreate) {
-                err = snd_ctl_add_integer_elem_set(ctlDev, elemInfo, 1, ctlCount, ctlMin, ctlMax, ctlStep);
-                if (err) {
-                    AFB_ERROR("AddOntSndCtl Integer: devid='%s' name='%s' count=%d min=%d max=%d step=%d", snd_ctl_name(ctlDev), ctlName, ctlCount, ctlMin, ctlMax, ctlStep);
-                    afb_req_fail_f(request, "ctl-invalid-bool", "devid='%s' name='%s' count=%d min=%d max=%d step=%d", snd_ctl_name(ctlDev), ctlName, ctlCount, ctlMin, ctlMax, ctlStep);
-                    goto OnErrorExit;
-                }
-            }
-
-            // Fulup needed to be tested with some dB expert !!!
-            json_object *dbscaleJ;
-            if (json_object_object_get_ex(ctlJ, "dbscale", &dbscaleJ)) {
-                int min, max;
-
-                if (json_object_get_type(dbscaleJ) != json_type_object) {
-                    afb_req_fail_f(request, "ctl-invalid-dbscale", "devid=%s crl=%s invalid json in integer control", snd_ctl_name(ctlDev), json_object_get_string(ctlJ));
-                    goto OnErrorExit;
-
-                    json_object_object_get_ex(ctlJ, "min", &tmpJ);
-                    min = json_object_get_int(tmpJ);
-                    if (min >= 0) {
-                        afb_req_fail_f(request, "ctl-invalid-dbscale", "devid=%s crl=%s min should be a negative number", snd_ctl_name(ctlDev), json_object_get_string(ctlJ));
-                        goto OnErrorExit;
-                    }
-
-                    // default value 0=mute
-                    json_object_object_get_ex(ctlJ, "max", &tmpJ);
-                    max = json_object_get_int(tmpJ);
-
-                    // default value 1dB
-                    json_object_object_get_ex(ctlJ, "step", &tmpJ);
-                    int step = json_object_get_int(tmpJ);
-                    if (step <= 0) step = 1;
-
-                    elemTlv = allocate_int_dbscale_tlv(min, max, step);
-
-                }
-            } else {
-                // provide a fake linear TLV
-                elemTlv = allocate_int_linear_tlv(ctlMin, ctlMax);
-            }
-            break;
-
-        case SND_CTL_ELEM_TYPE_ENUMERATED:
-
-            if (shouldCreate) {
-                json_object *enumsJ;
-                json_object_object_get_ex(ctlJ, "enums", &enumsJ);
-                if (json_object_get_type(enumsJ) != json_type_array) {
-                    afb_req_fail_f(request, "ctl-missing-enums", "devid=%s crl=%s mandatory enum=xxx missing in enumerated control", snd_ctl_name(ctlDev), json_object_get_string(ctlJ));
-                    goto OnErrorExit;
-                }
-
-                int length = json_object_array_length(enumsJ);
-                const char **enumlabels = malloc(length * sizeof (char*));
-
-                for (int jdx = 0; jdx < length; jdx++) {
-                    tmpJ = json_object_array_get_idx(enumsJ, jdx);
-                    enumlabels[jdx] = json_object_get_string(tmpJ);
-                }
-
-                err = snd_ctl_add_enumerated_elem_set(ctlDev, elemInfo, 1, ctlCount, length, enumlabels);
-                if (err) {
-                    afb_req_fail_f(request, "ctl-invalid-bool", "devid=%s crl=%s invalid enumerated control", snd_ctl_name(ctlDev), json_object_get_string(ctlJ));
-                    goto OnErrorExit;
-                }
-
-                // Fulup should be an empty container
-                elemTlv = allocate_bool_fake_tlv();
-            }
-            break;
-
-            // Long Term Waiting ToDoList
-        case SND_CTL_ELEM_TYPE_INTEGER64:
-        case SND_CTL_ELEM_TYPE_BYTES:
-        default:
-            afb_req_fail_f(request, "ctl-invalid-type", "crl=%s unsupported type type=%d numid=%d", json_object_get_string(ctlJ), ctlType, ctlNumid);
-            goto OnErrorExit;
-    }
-
-UpdateDefaultVal:
-
-    // Set Value to default
-    snd_ctl_elem_value_alloca(&elemValue);
-    for (int idx = 0; idx < snd_ctl_elem_info_get_count(elemInfo); idx++) {
-        snd_ctl_elem_value_set_integer(elemValue, idx, ctlValue);
-    }
-
-    // write default values in newly created control
-    snd_ctl_elem_id_alloca(&elemId);
-    snd_ctl_elem_info(ctlDev, elemInfo);
-    snd_ctl_elem_info_get_id(elemInfo, elemId);
-    snd_ctl_elem_value_set_id(elemValue, elemId);
-    err = snd_ctl_elem_write(ctlDev, elemValue);
-    if (err < 0) {
-        AFB_WARNING("addOneSndCtl: crl=%s numid=%d fail to write Values error=%s", json_object_get_string(ctlJ), snd_ctl_elem_info_get_numid(elemInfo), snd_strerror(err));
-        goto DoNotUpdate;
-    }
-
-    // write a default null TLV (if usefull should be implemented for every ctl type)
-    if (elemTlv) {
-        err = snd_ctl_elem_tlv_write(ctlDev, elemId, elemTlv);
-        if (err < 0) {
-            AFB_WARNING("addOneSndCtl: crl=%s numid=%d fail to write TLV error=%s", json_object_get_string(ctlJ), snd_ctl_elem_info_get_numid(elemInfo), snd_strerror(err));
-            goto DoNotUpdate;
-        }
-    }
-
-DoNotUpdate:
-    // return newly created as a JSON object
-    alsaGetSingleCtl(ctlDev, elemId, &ctlRequest, queryMode);
-    if (ctlRequest.used < 0) {
-        AFB_WARNING("addOneSndCtl: crl=%s numid=%d Fail to get value", json_object_get_string(ctlJ), snd_ctl_elem_info_get_numid(elemInfo));
-    }
-    return ctlRequest.valuesJ;
-
-OnErrorExit:
-    return NULL;
-}
-
-PUBLIC void alsaAddCustomCtls(afb_req request) {
-    int err;
-    json_object *ctlsJ, *ctlsValues, *ctlValues;
-    enum json_type;
-    snd_ctl_t *ctlDev = NULL;
-    const char *devid, *mode;
-
-    devid = afb_req_value(request, "devid");
-    if (devid == NULL) {
-        afb_req_fail_f(request, "devid-missing", "devid MUST be defined for alsaAddCustomCtls");
-        goto OnErrorExit;
-    }
-
-    // open control interface for devid
-    err = snd_ctl_open(&ctlDev, devid, 0);
-    if (err < 0) {
-        afb_req_fail_f(request, "devid-unknown", "SndCard devid=[%s] Not Found err=%s", devid, snd_strerror(err));
-        goto OnErrorExit;
-    }
-
-    // get verbosity level
-    halQueryMode queryMode = QUERY_QUIET;
-    mode = afb_req_value(request, "mode");
-    if (mode != NULL) {
-        sscanf(mode, "%i", (int*) &queryMode);
-    }
-
-    // extract sound controls and parse json
-    ctlsJ = json_tokener_parse(afb_req_value(request, "ctl"));
-    if (!ctlsJ) {
-        afb_req_fail_f(request, "ctls-missing", "ctls MUST be defined as a JSON array for alsaAddCustomCtls");
-        goto OnErrorExit;
-    }
-
-    switch (json_object_get_type(ctlsJ)) {
-        case json_type_object:
-            ctlsValues = addOneSndCtl(request, ctlDev, ctlsJ, queryMode);
-            if (!ctlsValues) goto OnErrorExit;
-            break;
-
-        case json_type_array:
-            ctlsValues = json_object_new_array();
-            for (int idx = 0; idx < json_object_array_length(ctlsJ); idx++) {
-                json_object *ctlJ = json_object_array_get_idx(ctlsJ, idx);
-                ctlValues = addOneSndCtl(request, ctlDev, ctlJ, queryMode);
-                if (ctlValues) json_object_array_add(ctlsValues, ctlValues);
-                else goto OnErrorExit;
-            }
-            break;
-
-        default:
-            afb_req_fail_f(request, "ctls-invalid", "ctls=%s not valid JSON array", json_object_get_string(ctlsJ));
-            goto OnErrorExit;
-    }
-
-    // get ctl as a json response
-    afb_req_success(request, ctlsValues, NULL);
-
-OnErrorExit:
-    if (ctlDev) snd_ctl_close(ctlDev);
-    return;
-}