static void change_bytes_elem_members(struct elem_set_trial *trial, snd_ctl_elem_value_t *elem_data) { unsigned char val; unsigned int i; for (i = 0; i < trial->member_count; ++i) { val = snd_ctl_elem_value_get_byte(elem_data, i); snd_ctl_elem_value_set_byte(elem_data, i, ++val); } }
static int binary_file_parse(snd_ctl_elem_value_t *dst, snd_ctl_elem_info_t *info, const char *filepath) { int err = 0; int fd; struct stat st; size_t sz; ssize_t sz_read; char *res; snd_ctl_elem_type_t type; unsigned int idx, count; type = snd_ctl_elem_info_get_type(info); if (type != SND_CTL_ELEM_TYPE_BYTES) { uc_error("only support byte type!"); err = -EINVAL; return err; } fd = open(filepath, O_RDONLY); if (fd < 0) { err = -errno; return err; } if (stat(filepath, &st) == -1) { err = -errno; goto __fail; } sz = st.st_size; count = snd_ctl_elem_info_get_count(info); if (sz != count || sz > sizeof(dst->value.bytes)) { uc_error("invalid parameter size %d!", sz); err = -EINVAL; goto __fail; } res = malloc(sz); if (res == NULL) { err = -ENOMEM; goto __fail; } sz_read = read(fd, res, sz); if (sz_read < 0 || (size_t)sz_read != sz) { err = -errno; goto __fail_read; } for (idx = 0; idx < sz; idx++) snd_ctl_elem_value_set_byte(dst, idx, *(res + idx)); __fail_read: free(res); __fail: close(fd); return err; }
status_t ALSAControl::set(const char *name, unsigned int value, int index) { if (!mHandle) { ALOGE("Control not initialized"); return NO_INIT; } snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *info; snd_ctl_elem_id_alloca(&id); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); snd_ctl_elem_id_set_name(id, name); snd_ctl_elem_info_set_id(info, id); int ret = snd_ctl_elem_info(mHandle, info); if (ret < 0) { ALOGE("Control '%s' cannot get element info: %d", name, ret); return BAD_VALUE; } int count = snd_ctl_elem_info_get_count(info); if (index >= count) { ALOGE("Control '%s' index is out of range (%d >= %d)", name, index, count); return BAD_VALUE; } if (index == -1) index = 0; // Range over all of them else count = index + 1; // Just do the one specified snd_ctl_elem_type_t type = snd_ctl_elem_info_get_type(info); snd_ctl_elem_value_t *control; snd_ctl_elem_value_alloca(&control); snd_ctl_elem_info_get_id(info, id); snd_ctl_elem_value_set_id(control, id); for (int i = index; i < count; i++) switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: snd_ctl_elem_value_set_boolean(control, i, value); break; case SND_CTL_ELEM_TYPE_INTEGER: snd_ctl_elem_value_set_integer(control, i, value); break; case SND_CTL_ELEM_TYPE_INTEGER64: snd_ctl_elem_value_set_integer64(control, i, value); break; case SND_CTL_ELEM_TYPE_ENUMERATED: snd_ctl_elem_value_set_enumerated(control, i, value); break; case SND_CTL_ELEM_TYPE_BYTES: snd_ctl_elem_value_set_byte(control, i, value); break; default: break; } ret = snd_ctl_elem_write(mHandle, control); return (ret < 0) ? BAD_VALUE : NO_ERROR; }
static int amixer_control(t_amixer *x, int argc, t_atom *argv, int roflag) { int err; snd_ctl_t *handle; snd_ctl_elem_info_t *info; snd_ctl_elem_id_t *id; snd_ctl_elem_value_t *control; char *ptr; unsigned int idx, count; long tmp; snd_ctl_elem_type_t type; snd_ctl_elem_info_alloca(&info); snd_ctl_elem_id_alloca(&id); snd_ctl_elem_value_alloca(&control); if (argc < 1) { error("Specify a full control identifier: [[iface=<iface>,][name='name',][index=<index>,][device=<device>,][subdevice=<subdevice>]]|[numid=<numid>]\n"); return -EINVAL; } if(A_FLOAT==argv->a_type){ snd_ctl_elem_id_set_numid(id, atom_getint(argv)); if(0) { error("Wrong control identifier: %d\n", atom_getint(argv)); return -EINVAL; } } else { if (parse_control_id(atom_getsymbol(argv)->s_name, id)) { error("Wrong control identifier: %s\n", atom_getsymbol(argv)->s_name); return -EINVAL; } } if ((err = snd_ctl_open(&handle, x->card, 0)) < 0) { error("Control %s open error: %s\n", x->card, snd_strerror(err)); return err; } snd_ctl_elem_info_set_id(info, id); if ((err = snd_ctl_elem_info(handle, info)) < 0) { error("Control %s cinfo error: %s\n", x->card, snd_strerror(err)); return err; } snd_ctl_elem_info_get_id(info, id); /* FIXME: Remove it when hctl find works ok !!! */ type = snd_ctl_elem_info_get_type(info); count = snd_ctl_elem_info_get_count(info); snd_ctl_elem_value_set_id(control, id); if (!roflag) { t_float atom_float = atom_getfloat(argv+1); int atom_isfloat = (A_FLOAT==(argv+1)->a_type); post("now setting"); ptr = atom_getsymbol(argv+1)->s_name; for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) { switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: tmp = 0; if(atom_isfloat){ tmp=(atom_float>0)?1:0; } else if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2)) { tmp = 1; ptr += 2; } else if (!strncasecmp(ptr, "yes", 3)) { tmp = 1; ptr += 3; } else if (!strncasecmp(ptr, "toggle", 6)) { tmp = snd_ctl_elem_value_get_boolean(control, idx); tmp = tmp > 0 ? 0 : 1; ptr += 6; } else if (isdigit(*ptr)) { tmp = atoi(ptr) > 0 ? 1 : 0; while (isdigit(*ptr)) ptr++; } else { while (*ptr && *ptr != ',') ptr++; } snd_ctl_elem_value_set_boolean(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER: tmp = atom_isfloat?((int)atom_float):get_integer(&ptr, snd_ctl_elem_info_get_min(info), snd_ctl_elem_info_get_max(info)); snd_ctl_elem_value_set_integer(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER64: tmp = atom_isfloat?((int)atom_float):get_integer64(&ptr, snd_ctl_elem_info_get_min64(info), snd_ctl_elem_info_get_max64(info)); snd_ctl_elem_value_set_integer64(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_ENUMERATED: tmp = atom_isfloat?((int)atom_float):get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1); snd_ctl_elem_value_set_enumerated(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_BYTES: tmp = atom_isfloat?((int)atom_float):get_integer(&ptr, 0, 255); snd_ctl_elem_value_set_byte(control, idx, tmp); break; default: break; } if (!strchr(atom_getsymbol(argv+1)->s_name, ',')) ptr = atom_getsymbol(argv+1)->s_name; else if (*ptr == ',') ptr++; } if ((err = snd_ctl_elem_write(handle, control)) < 0) { error("Control %s element write error: %s\n", x->card, snd_strerror(err)); return err; } } snd_ctl_close(handle); if (1) { snd_hctl_t *hctl; snd_hctl_elem_t *elem; if ((err = snd_hctl_open(&hctl, x->card, 0)) < 0) { error("Control %s open error: %s\n", x->card, snd_strerror(err)); return err; } if ((err = snd_hctl_load(hctl)) < 0) { error("Control %s load error: %s\n", x->card, snd_strerror(err)); return err; } elem = snd_hctl_find_elem(hctl, id); if (elem) show_control(x->card, " ", elem, LEVEL_BASIC | LEVEL_ID); else printf("Could not find the specified element\n"); snd_hctl_close(hctl); } }
static int cset(int argc, char *argv[], int roflag, int keep_handle) { int err; static snd_ctl_t *handle = NULL; snd_ctl_elem_info_t *info; snd_ctl_elem_id_t *id; snd_ctl_elem_value_t *control; char *ptr; unsigned int idx, count; long tmp; snd_ctl_elem_type_t type; snd_ctl_elem_info_alloca(&info); snd_ctl_elem_id_alloca(&id); snd_ctl_elem_value_alloca(&control); if (argc < 1) return -EINVAL; if (parse_control_id(argv[0], id)) return -EINVAL; if (handle == NULL && (err = snd_ctl_open(&handle, card, 0)) < 0) return err; snd_ctl_elem_info_set_id(info, id); if ((err = snd_ctl_elem_info(handle, info)) < 0) { if (!keep_handle) { snd_ctl_close(handle); handle = NULL; } return err; } snd_ctl_elem_info_get_id(info, id); type = snd_ctl_elem_info_get_type(info); count = snd_ctl_elem_info_get_count(info); snd_ctl_elem_value_set_id(control, id); if (!roflag) { ptr = argv[1]; for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) { switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: tmp = 0; if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2)) { tmp = 1; ptr += 2; } else if (!strncasecmp(ptr, "yes", 3)) { tmp = 1; ptr += 3; } else if (!strncasecmp(ptr, "toggle", 6)) { tmp = snd_ctl_elem_value_get_boolean(control, idx); tmp = tmp > 0 ? 0 : 1; ptr += 6; } else if (isdigit(*ptr)) { tmp = atoi(ptr) > 0 ? 1 : 0; while (isdigit(*ptr)) ptr++; } else { while (*ptr && *ptr != ',') ptr++; } snd_ctl_elem_value_set_boolean(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER: tmp = get_integer(&ptr, snd_ctl_elem_info_get_min(info), snd_ctl_elem_info_get_max(info)); snd_ctl_elem_value_set_integer(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER64: tmp = get_integer64(&ptr, snd_ctl_elem_info_get_min64(info), snd_ctl_elem_info_get_max64(info)); snd_ctl_elem_value_set_integer64(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_ENUMERATED: tmp = get_ctl_enum_item_index(handle, info, &ptr); if (tmp < 0) tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1); snd_ctl_elem_value_set_enumerated(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_BYTES: tmp = get_integer(&ptr, 0, 255); snd_ctl_elem_value_set_byte(control, idx, tmp); break; default: break; } if (!strchr(argv[1], ',')) ptr = argv[1]; else if (*ptr == ',') ptr++; } if ((err = snd_ctl_elem_write(handle, control)) < 0) { if (!keep_handle) { snd_ctl_close(handle); handle = NULL; } return err; } } if (! keep_handle) { snd_ctl_close(handle); handle = NULL; } if (!quiet) { snd_hctl_t *hctl; snd_hctl_elem_t *elem; if ((err = snd_hctl_open(&hctl, card, 0)) < 0) return err; if ((err = snd_hctl_load(hctl)) < 0) return err; elem = snd_hctl_find_elem(hctl, id); if (elem) show_control(" ", elem, LEVEL_BASIC | LEVEL_ID); snd_hctl_close(hctl); } return 0; }
/** * \brief parse ASCII string as CTL element value * \param handle CTL handle * \param dst destination CTL element value * \param info CTL element info structure * \param value source ASCII string * \return zero on success, otherwise a negative error code * * Note: For toggle command, the dst must contain previous (current) * state (do the #snd_ctl_elem_read call to obtain it). */ int snd_ctl_ascii_value_parse(snd_ctl_t *handle, snd_ctl_elem_value_t *dst, snd_ctl_elem_info_t *info, const char *value) { const char *ptr = value; snd_ctl_elem_id_t myid = {0}; snd_ctl_elem_type_t type; unsigned int idx, count; long tmp; long long tmp64; snd_ctl_elem_info_get_id(info, &myid); type = snd_ctl_elem_info_get_type(info); count = snd_ctl_elem_info_get_count(info); snd_ctl_elem_value_set_id(dst, &myid); for (idx = 0; idx < count && idx < 128 && ptr && *ptr; idx++) { if (*ptr == ',') goto skip; switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: tmp = 0; if (!strncasecmp(ptr, "on", 2) || !strncasecmp(ptr, "up", 2)) { tmp = 1; ptr += 2; } else if (!strncasecmp(ptr, "yes", 3)) { tmp = 1; ptr += 3; } else if (!strncasecmp(ptr, "toggle", 6)) { tmp = snd_ctl_elem_value_get_boolean(dst, idx); tmp = tmp > 0 ? 0 : 1; ptr += 6; } else if (isdigit(*ptr)) { tmp = atoi(ptr) > 0 ? 1 : 0; while (isdigit(*ptr)) ptr++; } else { while (*ptr && *ptr != ',') ptr++; } snd_ctl_elem_value_set_boolean(dst, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER: tmp = get_integer(&ptr, snd_ctl_elem_info_get_min(info), snd_ctl_elem_info_get_max(info)); snd_ctl_elem_value_set_integer(dst, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER64: tmp64 = get_integer64(&ptr, snd_ctl_elem_info_get_min64(info), snd_ctl_elem_info_get_max64(info)); snd_ctl_elem_value_set_integer64(dst, idx, tmp64); break; case SND_CTL_ELEM_TYPE_ENUMERATED: tmp = get_ctl_enum_item_index(handle, info, &ptr); if (tmp < 0) tmp = get_integer(&ptr, 0, snd_ctl_elem_info_get_items(info) - 1); snd_ctl_elem_value_set_enumerated(dst, idx, tmp); break; case SND_CTL_ELEM_TYPE_BYTES: tmp = get_integer(&ptr, 0, 255); snd_ctl_elem_value_set_byte(dst, idx, tmp); break; default: break; } skip: if (!strchr(value, ',')) ptr = value; else if (*ptr == ',') ptr++; } return 0; }
bool LegacyAmixerControl::accessHW(bool receive, string &error) { CAutoLog autoLog(getConfigurableElement(), "ALSA", isDebugEnabled()); #ifdef SIMULATION if (receive) { memset(getBlackboardLocation(), 0, getSize()); } log_info("%s ALSA Element Instance: %s\t\t(Control Element: %s)", receive ? "Reading" : "Writing", getConfigurableElement()->getPath().c_str(), getControlName().c_str()); return true; #endif int ret; // Mixer handle snd_ctl_t *sndCtrl; uint32_t value; uint32_t index; uint32_t elementCount; snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *info; snd_ctl_elem_value_t *control; logControlInfo(receive); // Check parameter type is ok (deferred error, no exceptions available :-() if (!isTypeSupported()) { error = "Parameter type not supported."; return false; } int cardNumber = getCardNumber(); if (cardNumber < 0) { error = "Card " + getCardName() + " not found. Error: " + strerror(cardNumber); return false; } #ifdef ANDROID if ((ret = snd_ctl_hw_open(&sndCtrl, NULL, cardNumber, 0)) < 0) { error = snd_strerror(ret); return false; } #else // Create device name ostringstream deviceName; deviceName << "hw:" << cardNumber; // Open sound control if ((ret = snd_ctl_open(&sndCtrl, deviceName.str().c_str(), 0)) < 0) { error = snd_strerror(ret); return false; } #endif // Allocate in stack snd_ctl_elem_id_alloca(&id); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_value_alloca(&control); // Set interface snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); string controlName = getControlName(); // Set name or id if (isdigit(controlName[0])) { snd_ctl_elem_id_set_numid(id, asInteger(controlName)); } else { snd_ctl_elem_id_set_name(id, controlName.c_str()); } // Init info id snd_ctl_elem_info_set_id(info, id); // Get info if ((ret = snd_ctl_elem_info(sndCtrl, info)) < 0) { error = "ALSA: Unable to get element info " + controlName + ": " + snd_strerror(ret); // Close sound control snd_ctl_close(sndCtrl); return false; } // Get type snd_ctl_elem_type_t eType = snd_ctl_elem_info_get_type(info); // Get element count elementCount = snd_ctl_elem_info_get_count(info); uint32_t scalarSize = getScalarSize(); // If size defined in the PFW different from alsa mixer control size, return an error if (elementCount * scalarSize != getSize()) { error = "ALSA: Control element count (" + asString(elementCount) + ") and configurable scalar element count (" + asString(getSize() / scalarSize) + ") mismatch"; // Close sound control snd_ctl_close(sndCtrl); return false; } // Set value id snd_ctl_elem_value_set_id(control, id); if (receive) { // Read element if ((ret = snd_ctl_elem_read(sndCtrl, control)) < 0) { error = "ALSA: Unable to read element " + controlName + ": " + snd_strerror(ret); // Close sound control snd_ctl_close(sndCtrl); return false; } // Go through all indexes for (index = 0; index < elementCount; index++) { switch (eType) { case SND_CTL_ELEM_TYPE_BOOLEAN: value = snd_ctl_elem_value_get_boolean(control, index); break; case SND_CTL_ELEM_TYPE_INTEGER: value = snd_ctl_elem_value_get_integer(control, index); break; case SND_CTL_ELEM_TYPE_INTEGER64: value = snd_ctl_elem_value_get_integer64(control, index); break; case SND_CTL_ELEM_TYPE_ENUMERATED: value = snd_ctl_elem_value_get_enumerated(control, index); break; case SND_CTL_ELEM_TYPE_BYTES: value = snd_ctl_elem_value_get_byte(control, index); break; default: error = "ALSA: Unknown control element type while reading alsa element " + controlName; return false; } if (isDebugEnabled()) { log_info("Reading alsa element %s, index %u with value %u", controlName.c_str(), index, value); } // Write data to blackboard (beware this code is OK on Little Endian machines only) toBlackboard(value); } } else { // Go through all indexes for (index = 0; index < elementCount; index++) { // Read data from blackboard (beware this code is OK on Little Endian machines only) value = fromBlackboard(); if (isDebugEnabled()) { log_info("Writing alsa element %s, index %u with value %u", controlName.c_str(), index, value); } switch (eType) { case SND_CTL_ELEM_TYPE_BOOLEAN: snd_ctl_elem_value_set_boolean(control, index, value); break; case SND_CTL_ELEM_TYPE_INTEGER: snd_ctl_elem_value_set_integer(control, index, value); break; case SND_CTL_ELEM_TYPE_INTEGER64: snd_ctl_elem_value_set_integer64(control, index, value); break; case SND_CTL_ELEM_TYPE_ENUMERATED: snd_ctl_elem_value_set_enumerated(control, index, value); break; case SND_CTL_ELEM_TYPE_BYTES: snd_ctl_elem_value_set_byte(control, index, value); break; default: error = "ALSA: Unknown control element type while writing alsa element " + controlName; return false; } } // Write element if ((ret = snd_ctl_elem_write(sndCtrl, control)) < 0) { error = "ALSA: Unable to write element " + controlName + ": " + snd_strerror(ret); // Close sound control snd_ctl_close(sndCtrl); return false; } } // Close sound control snd_ctl_close(sndCtrl); return true; }
int hw_audio_set(const char *name, int value) { static snd_ctl_t *handle = NULL; int err; snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *info; snd_ctl_elem_value_t *control; snd_ctl_elem_id_alloca(&id); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_value_alloca(&control); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); snd_ctl_elem_id_set_name(id, name); snd_ctl_elem_info_set_id(info, id); if (handle == NULL && (err = snd_ctl_open(&handle, "default", 0)) < 0) { LOGE("Control default open error: %s\n", snd_strerror(err)); return 0; } int ret = snd_ctl_elem_info(handle, info); if (ret < 0) { LOGE("Cannot find the given element from control default ret=%d %s ", ret, snd_strerror(ret)); return 0; } snd_ctl_elem_type_t type = snd_ctl_elem_info_get_type(info); snd_ctl_elem_info_get_id(info, id); snd_ctl_elem_value_set_id(control, id); switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: snd_ctl_elem_value_set_boolean(control, 0, value); break; case SND_CTL_ELEM_TYPE_INTEGER: snd_ctl_elem_value_set_integer(control, 0, value); break; case SND_CTL_ELEM_TYPE_INTEGER64: snd_ctl_elem_value_set_integer64(control, 0, value); break; case SND_CTL_ELEM_TYPE_ENUMERATED: snd_ctl_elem_value_set_enumerated(control, 0, value); break; case SND_CTL_ELEM_TYPE_BYTES: snd_ctl_elem_value_set_byte(control, 0, value); break; default: break; } ret = snd_ctl_elem_write(handle, control); if(ret <0) { LOGE("Control default load error: %s\n", snd_strerror(ret)); } return 1; }