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; }
bool CAESinkALSA::GetELD(snd_hctl_t *hctl, int device, CAEDeviceInfo& info, bool& badHDMI) { badHDMI = false; snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *einfo; snd_ctl_elem_value_t *control; snd_hctl_elem_t *elem; snd_ctl_elem_id_alloca(&id); memset(id, 0, snd_ctl_elem_id_sizeof()); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_PCM); snd_ctl_elem_id_set_name (id, "ELD" ); snd_ctl_elem_id_set_device (id, device); elem = snd_hctl_find_elem(hctl, id); if (!elem) return false; snd_ctl_elem_info_alloca(&einfo); memset(einfo, 0, snd_ctl_elem_info_sizeof()); if (snd_hctl_elem_info(elem, einfo) < 0) return false; if (!snd_ctl_elem_info_is_readable(einfo)) return false; if (snd_ctl_elem_info_get_type(einfo) != SND_CTL_ELEM_TYPE_BYTES) return false; snd_ctl_elem_value_alloca(&control); memset(control, 0, snd_ctl_elem_value_sizeof()); if (snd_hctl_elem_read(elem, control) < 0) return false; int dataLength = snd_ctl_elem_info_get_count(einfo); /* if there is no ELD data, then its a bad HDMI device, either nothing attached OR an invalid nVidia HDMI device * OR the driver doesn't properly support ELD (notably ATI/AMD, 2012-05) */ if (!dataLength) badHDMI = true; else CAEELDParser::Parse( (const uint8_t*)snd_ctl_elem_value_get_bytes(control), dataLength, info ); info.m_deviceType = AE_DEVTYPE_HDMI; return true; }
static int setamixer(int devnum,char *param, int v1, int v2) { int type; char str[100]; snd_hctl_t *hctl; snd_ctl_elem_id_t *id; snd_ctl_elem_value_t *control; snd_hctl_elem_t *elem; snd_ctl_elem_info_t *info; sprintf(str,"hw:%d",devnum); if (snd_hctl_open(&hctl, str, 0)) return(-1); snd_hctl_load(hctl); snd_ctl_elem_id_alloca(&id); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); snd_ctl_elem_id_set_name(id, param); elem = snd_hctl_find_elem(hctl, id); if (!elem) { snd_hctl_close(hctl); return(-1); } snd_ctl_elem_info_alloca(&info); snd_hctl_elem_info(elem,info); type = snd_ctl_elem_info_get_type(info); snd_ctl_elem_value_alloca(&control); snd_ctl_elem_value_set_id(control, id); switch(type) { case SND_CTL_ELEM_TYPE_INTEGER: snd_ctl_elem_value_set_integer(control, 0, v1); if (v2 > 0) snd_ctl_elem_value_set_integer(control, 1, v2); break; case SND_CTL_ELEM_TYPE_BOOLEAN: snd_ctl_elem_value_set_integer(control, 0, (v1 != 0)); break; } if (snd_hctl_elem_write(elem, control)) { snd_hctl_close(hctl); return(-1); } snd_hctl_close(hctl); return(0); }
static int amixer_max(int devnum,char *param) { int rv,type; char str[100]; snd_hctl_t *hctl; snd_ctl_elem_id_t *id; snd_hctl_elem_t *elem; snd_ctl_elem_info_t *info; sprintf(str,"hw:%d",devnum); if (snd_hctl_open(&hctl, str, 0)) return(-1); snd_hctl_load(hctl); snd_ctl_elem_id_alloca(&id); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); snd_ctl_elem_id_set_name(id, param); elem = snd_hctl_find_elem(hctl, id); if (!elem) { snd_hctl_close(hctl); return(-1); } snd_ctl_elem_info_alloca(&info); snd_hctl_elem_info(elem,info); type = snd_ctl_elem_info_get_type(info); rv = 0; switch(type) { case SND_CTL_ELEM_TYPE_INTEGER: rv = snd_ctl_elem_info_get_max(info); break; case SND_CTL_ELEM_TYPE_BOOLEAN: rv = 1; break; } snd_hctl_close(hctl); return(rv); }
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; }
static const char *control_type(snd_ctl_elem_info_t *info) { return snd_ctl_elem_type_name(snd_ctl_elem_info_get_type(info)); }
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 show_control(const char* card, const char *space, snd_hctl_elem_t *elem, int level) { int err; unsigned int item, idx; unsigned int count; snd_ctl_elem_type_t type; 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); if ((err = snd_hctl_elem_info(elem, info)) < 0) { error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err)); return err; } if (level & LEVEL_ID) { snd_hctl_elem_get_id(elem, id); show_control_id(id); printf("\n"); } count = snd_ctl_elem_info_get_count(info); type = snd_ctl_elem_info_get_type(info); printf("%s; type=%s,access=%s,values=%i", space, control_type(info), control_access(info), count); switch (type) { case SND_CTL_ELEM_TYPE_INTEGER: printf(",min=%li,max=%li,step=%li\n", snd_ctl_elem_info_get_min(info), snd_ctl_elem_info_get_max(info), snd_ctl_elem_info_get_step(info)); break; case SND_CTL_ELEM_TYPE_INTEGER64: printf(",min=%Li,max=%Li,step=%Li\n", snd_ctl_elem_info_get_min64(info), snd_ctl_elem_info_get_max64(info), snd_ctl_elem_info_get_step64(info)); break; case SND_CTL_ELEM_TYPE_ENUMERATED: { unsigned int items = snd_ctl_elem_info_get_items(info); printf(",items=%u\n", items); for (item = 0; item < items; item++) { snd_ctl_elem_info_set_item(info, item); if ((err = snd_hctl_elem_info(elem, info)) < 0) { error("Control %s element info error: %s\n", card, snd_strerror(err)); return err; } printf("%s; Item #%u '%s'\n", space, item, snd_ctl_elem_info_get_item_name(info)); } break; } default: printf("\n"); break; } if (level & LEVEL_BASIC) { if ((err = snd_hctl_elem_read(elem, control)) < 0) { error("Control %s element read error: %s\n", card, snd_strerror(err)); return err; } printf("%s: values=", space); for (idx = 0; idx < count; idx++) { if (idx > 0) printf(","); switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: printf("%s", snd_ctl_elem_value_get_boolean(control, idx) ? "on" : "off"); break; case SND_CTL_ELEM_TYPE_INTEGER: printf("%li", snd_ctl_elem_value_get_integer(control, idx)); break; case SND_CTL_ELEM_TYPE_INTEGER64: printf("%Li", snd_ctl_elem_value_get_integer64(control, idx)); break; case SND_CTL_ELEM_TYPE_ENUMERATED: printf("%u", snd_ctl_elem_value_get_enumerated(control, idx)); break; case SND_CTL_ELEM_TYPE_BYTES: printf("0x%02x", snd_ctl_elem_value_get_byte(control, idx)); break; default: printf("?"); break; } } printf("\n"); } return 0; }
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; }
static int show_control(const char *space, snd_hctl_elem_t *elem, int level) { int err; unsigned int item, idx, count, *tlv; snd_ctl_elem_type_t type; snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *info; snd_ctl_elem_value_t *control; snd_aes_iec958_t iec958; snd_ctl_elem_id_alloca(&id); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_value_alloca(&control); if ((err = snd_hctl_elem_info(elem, info)) < 0) { error("Control %s snd_hctl_elem_info error: %s\n", card, snd_strerror(err)); return err; } if (level & LEVEL_ID) { snd_hctl_elem_get_id(elem, id); show_control_id(id); printf("\n"); } count = snd_ctl_elem_info_get_count(info); type = snd_ctl_elem_info_get_type(info); printf("%s; type=%s,access=%s,values=%i", space, control_type(info), control_access(info), count); switch (type) { case SND_CTL_ELEM_TYPE_INTEGER: printf(",min=%li,max=%li,step=%li\n", snd_ctl_elem_info_get_min(info), snd_ctl_elem_info_get_max(info), snd_ctl_elem_info_get_step(info)); break; case SND_CTL_ELEM_TYPE_INTEGER64: printf(",min=%Li,max=%Li,step=%Li\n", snd_ctl_elem_info_get_min64(info), snd_ctl_elem_info_get_max64(info), snd_ctl_elem_info_get_step64(info)); break; case SND_CTL_ELEM_TYPE_ENUMERATED: { unsigned int items = snd_ctl_elem_info_get_items(info); printf(",items=%u\n", items); for (item = 0; item < items; item++) { snd_ctl_elem_info_set_item(info, item); if ((err = snd_hctl_elem_info(elem, info)) < 0) { error("Control %s element info error: %s\n", card, snd_strerror(err)); return err; } printf("%s; Item #%u '%s'\n", space, item, snd_ctl_elem_info_get_item_name(info)); } break; } default: printf("\n"); break; } if (level & LEVEL_BASIC) { if (!snd_ctl_elem_info_is_readable(info)) goto __skip_read; if ((err = snd_hctl_elem_read(elem, control)) < 0) { error("Control %s element read error: %s\n", card, snd_strerror(err)); return err; } printf("%s: values=", space); for (idx = 0; idx < count; idx++) { if (idx > 0) printf(","); switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: printf("%s", snd_ctl_elem_value_get_boolean(control, idx) ? "on" : "off"); break; case SND_CTL_ELEM_TYPE_INTEGER: printf("%li", snd_ctl_elem_value_get_integer(control, idx)); break; case SND_CTL_ELEM_TYPE_INTEGER64: printf("%Li", snd_ctl_elem_value_get_integer64(control, idx)); break; case SND_CTL_ELEM_TYPE_ENUMERATED: printf("%u", snd_ctl_elem_value_get_enumerated(control, idx)); break; case SND_CTL_ELEM_TYPE_BYTES: printf("0x%02x", snd_ctl_elem_value_get_byte(control, idx)); break; case SND_CTL_ELEM_TYPE_IEC958: snd_ctl_elem_value_get_iec958(control, &iec958); printf("[AES0=0x%02x AES1=0x%02x AES2=0x%02x AES3=0x%02x]", iec958.status[0], iec958.status[1], iec958.status[2], iec958.status[3]); break; default: printf("?"); break; } } printf("\n"); __skip_read: if (!snd_ctl_elem_info_is_tlv_readable(info)) goto __skip_tlv; tlv = malloc(4096); if ((err = snd_hctl_elem_tlv_read(elem, tlv, 4096)) < 0) { error("Control %s element TLV read error: %s\n", card, snd_strerror(err)); free(tlv); return err; } decode_tlv(strlen(space), tlv, 4096); free(tlv); } __skip_tlv: return 0; }
void V4LRadioControl::callAmixer(const QString& target, const QString& value) { int err; long tmp; unsigned int count; static snd_ctl_t *handle = NULL; QString card("hw:0"); snd_ctl_elem_info_t *info; snd_ctl_elem_id_t *id; snd_ctl_elem_value_t *control; snd_ctl_elem_type_t type; snd_ctl_elem_info_alloca(&info); snd_ctl_elem_id_alloca(&id); snd_ctl_elem_value_alloca(&control); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); /* MIXER */ // in amixer parse func // char target[64]; // e.g. PGA CAPTure Switch snd_ctl_elem_id_set_name(id, target.toAscii()); if (handle == NULL && (err = snd_ctl_open(&handle, card.toAscii(), 0)) < 0) { return; } snd_ctl_elem_info_set_id(info, id); if ((err = snd_ctl_elem_info(handle, info)) < 0) { snd_ctl_close(handle); handle = NULL; return; } 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); tmp = 0; for (uint idx = 0; idx < count && idx < 128; idx++) { switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: #ifdef MULTIMEDIA_MAEMO_DEBUG qDebug() << "SND_CTL_ELEM_TYPE_BOOLEAN" << SND_CTL_ELEM_TYPE_BOOLEAN; #endif if ((value == "on") ||(value == "1")) { tmp = 1; } snd_ctl_elem_value_set_boolean(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_ENUMERATED: tmp = getEnumItemIndex(handle, info, value); snd_ctl_elem_value_set_enumerated(control, idx, tmp); break; case SND_CTL_ELEM_TYPE_INTEGER: #ifdef MULTIMEDIA_MAEMO_DEBUG qDebug() << "SND_CTL_ELEM_TYPE_INTEGER" << SND_CTL_ELEM_TYPE_INTEGER; #endif tmp = atoi(value.toAscii()); if (tmp < snd_ctl_elem_info_get_min(info)) tmp = snd_ctl_elem_info_get_min(info); else if (tmp > snd_ctl_elem_info_get_max(info)) tmp = snd_ctl_elem_info_get_max(info); snd_ctl_elem_value_set_integer(control, idx, tmp); break; default: break; } } if ((err = snd_ctl_elem_write(handle, control)) < 0) { snd_ctl_close(handle); handle = NULL; return; } snd_ctl_close(handle); handle = NULL; }
static int check_elem_set_props(struct elem_set_trial *trial) { snd_ctl_elem_id_t *id; snd_ctl_elem_info_t *info; unsigned int numid; unsigned int index; unsigned int i; unsigned int j; int err; snd_ctl_elem_id_alloca(&id); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_info_set_id(info, trial->id); numid = snd_ctl_elem_id_get_numid(trial->id); index = snd_ctl_elem_id_get_index(trial->id); for (i = 0; i < trial->element_count; ++i) { snd_ctl_elem_info_set_index(info, index + i); /* * In Linux 4.0 or former, ioctl(SNDRV_CTL_IOCTL_ELEM_ADD) * doesn't fill all of fields for identification. */ if (numid > 0) snd_ctl_elem_info_set_numid(info, numid + i); err = snd_ctl_elem_info(trial->handle, info); if (err < 0) return err; /* Check some common properties. */ if (snd_ctl_elem_info_get_type(info) != trial->type) return -EIO; if (snd_ctl_elem_info_get_count(info) != trial->member_count) return -EIO; for (j = 0; j < 4; ++j) { if (snd_ctl_elem_info_get_dimension(info, j) != trial->dimension[j]) return -EIO; } /* * In a case of IPC, this is the others. But in this case, * it's myself. */ if (snd_ctl_elem_info_get_owner(info) != getpid()) return -EIO; /* * Just adding an element set by userspace applications, * included elements are initially locked. */ if (!snd_ctl_elem_info_is_locked(info)) return -EIO; /* Check type-specific properties. */ if (trial->check_elem_props != NULL) { err = trial->check_elem_props(trial, info); if (err < 0) return err; } snd_ctl_elem_info_get_id(info, id); err = snd_ctl_elem_unlock(trial->handle, id); if (err < 0) return err; } return 0; }
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 get_control(snd_ctl_t *handle, snd_ctl_elem_id_t *id, snd_config_t *top) { snd_ctl_elem_value_t *ctl; snd_ctl_elem_info_t *info; snd_config_t *control, *comment, *item, *value; const char *s; char buf[256]; unsigned int idx; int err; unsigned int device, subdevice, index; const char *name; snd_ctl_elem_type_t type; unsigned int count; snd_ctl_elem_value_alloca(&ctl); snd_ctl_elem_info_alloca(&info); snd_ctl_elem_info_set_id(info, id); err = snd_ctl_elem_info(handle, info); if (err < 0) { error("Cannot read control info '%s': %s", id_str(id), snd_strerror(err)); return err; } if (snd_ctl_elem_info_is_inactive(info) || !snd_ctl_elem_info_is_readable(info)) return 0; snd_ctl_elem_value_set_id(ctl, id); err = snd_ctl_elem_read(handle, ctl); if (err < 0) { error("Cannot read control '%s': %s", id_str(id), snd_strerror(err)); return err; } err = snd_config_compound_add(top, num_str(snd_ctl_elem_info_get_numid(info)), 0, &control); if (err < 0) { error("snd_config_compound_add: %s", snd_strerror(err)); return err; } err = snd_config_compound_add(control, "comment", 1, &comment); if (err < 0) { error("snd_config_compound_add: %s", snd_strerror(err)); return err; } buf[0] = '\0'; buf[1] = '\0'; if (snd_ctl_elem_info_is_readable(info)) strcat(buf, " read"); if (snd_ctl_elem_info_is_writable(info)) strcat(buf, " write"); if (snd_ctl_elem_info_is_inactive(info)) strcat(buf, " inactive"); if (snd_ctl_elem_info_is_volatile(info)) strcat(buf, " volatile"); if (snd_ctl_elem_info_is_locked(info)) strcat(buf, " locked"); if (snd_ctl_elem_info_is_user(info)) strcat(buf, " user"); err = snd_config_string_add(comment, "access", buf + 1); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } type = snd_ctl_elem_info_get_type(info); device = snd_ctl_elem_info_get_device(info); subdevice = snd_ctl_elem_info_get_subdevice(info); index = snd_ctl_elem_info_get_index(info); name = snd_ctl_elem_info_get_name(info); count = snd_ctl_elem_info_get_count(info); s = snd_ctl_elem_type_name(type); err = snd_config_string_add(comment, "type", s); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } err = snd_config_integer_add(comment, "count", count); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: break; case SND_CTL_ELEM_TYPE_INTEGER: { long min = snd_ctl_elem_info_get_min(info); long max = snd_ctl_elem_info_get_max(info); long step = snd_ctl_elem_info_get_step(info); if (step) sprintf(buf, "%li - %li (step %li)", min, max, step); else sprintf(buf, "%li - %li", min, max); err = snd_config_string_add(comment, "range", buf); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } if (snd_ctl_elem_info_is_tlv_readable(info)) { err = add_tlv_comments(handle, id, info, comment); if (err < 0) return err; } break; } case SND_CTL_ELEM_TYPE_INTEGER64: { long long min = snd_ctl_elem_info_get_min64(info); long long max = snd_ctl_elem_info_get_max64(info); long long step = snd_ctl_elem_info_get_step64(info); if (step) sprintf(buf, "%Li - %Li (step %Li)", min, max, step); else sprintf(buf, "%Li - %Li", min, max); err = snd_config_string_add(comment, "range", buf); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } break; } case SND_CTL_ELEM_TYPE_ENUMERATED: { unsigned int items; err = snd_config_compound_add(comment, "item", 1, &item); if (err < 0) { error("snd_config_compound_add: %s", snd_strerror(err)); return err; } items = snd_ctl_elem_info_get_items(info); for (idx = 0; idx < items; idx++) { snd_ctl_elem_info_set_item(info, idx); err = snd_ctl_elem_info(handle, info); if (err < 0) { error("snd_ctl_card_info: %s", snd_strerror(err)); return err; } err = snd_config_string_add(item, num_str(idx), snd_ctl_elem_info_get_item_name(info)); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } } break; } default: break; } s = snd_ctl_elem_iface_name(snd_ctl_elem_info_get_interface(info)); err = snd_config_string_add(control, "iface", s); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } if (device != 0) { err = snd_config_integer_add(control, "device", device); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } } if (subdevice != 0) { err = snd_config_integer_add(control, "subdevice", subdevice); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } } err = snd_config_string_add(control, "name", name); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } if (index != 0) { err = snd_config_integer_add(control, "index", index); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } } switch (type) { case SND_CTL_ELEM_TYPE_BYTES: case SND_CTL_ELEM_TYPE_IEC958: { size_t size = type == SND_CTL_ELEM_TYPE_BYTES ? count : sizeof(snd_aes_iec958_t); char buf[size * 2 + 1]; char *p = buf; char *hex = "0123456789abcdef"; const unsigned char *bytes = (const unsigned char *)snd_ctl_elem_value_get_bytes(ctl); for (idx = 0; idx < size; idx++) { int v = bytes[idx]; *p++ = hex[v >> 4]; *p++ = hex[v & 0x0f]; } *p = '\0'; err = snd_config_string_add(control, "value", buf); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } return 0; } default: break; } if (count == 1) { switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: err = snd_config_string_add(control, "value", snd_ctl_elem_value_get_boolean(ctl, 0) ? "true" : "false"); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } return 0; case SND_CTL_ELEM_TYPE_INTEGER: err = snd_config_integer_add(control, "value", snd_ctl_elem_value_get_integer(ctl, 0)); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } return 0; case SND_CTL_ELEM_TYPE_INTEGER64: err = snd_config_integer64_add(control, "value", snd_ctl_elem_value_get_integer64(ctl, 0)); if (err < 0) { error("snd_config_integer64_add: %s", snd_strerror(err)); return err; } return 0; case SND_CTL_ELEM_TYPE_ENUMERATED: { unsigned int v = snd_ctl_elem_value_get_enumerated(ctl, 0); snd_config_t *c; err = snd_config_search(item, num_str(v), &c); if (err == 0) { err = snd_config_get_string(c, &s); assert(err == 0); err = snd_config_string_add(control, "value", s); } else { err = snd_config_integer_add(control, "value", v); } if (err < 0) error("snd_config add: %s", snd_strerror(err)); return 0; } default: error("Unknown control type: %d\n", type); return -EINVAL; } } err = snd_config_compound_add(control, "value", 1, &value); if (err < 0) { error("snd_config_compound_add: %s", snd_strerror(err)); return err; } switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: for (idx = 0; idx < count; idx++) { err = snd_config_string_add(value, num_str(idx), snd_ctl_elem_value_get_boolean(ctl, idx) ? "true" : "false"); if (err < 0) { error("snd_config_string_add: %s", snd_strerror(err)); return err; } } break; case SND_CTL_ELEM_TYPE_INTEGER: for (idx = 0; idx < count; idx++) { err = snd_config_integer_add(value, num_str(idx), snd_ctl_elem_value_get_integer(ctl, idx)); if (err < 0) { error("snd_config_integer_add: %s", snd_strerror(err)); return err; } } break; case SND_CTL_ELEM_TYPE_INTEGER64: for (idx = 0; idx < count; idx++) { err = snd_config_integer64_add(value, num_str(idx), snd_ctl_elem_value_get_integer64(ctl, idx)); if (err < 0) { error("snd_config_integer64_add: %s", snd_strerror(err)); return err; } } break; case SND_CTL_ELEM_TYPE_ENUMERATED: for (idx = 0; idx < count; idx++) { unsigned int v = snd_ctl_elem_value_get_enumerated(ctl, idx); snd_config_t *c; err = snd_config_search(item, num_str(v), &c); if (err == 0) { err = snd_config_get_string(c, &s); assert(err == 0); err = snd_config_string_add(value, num_str(idx), s); } else { err = snd_config_integer_add(value, num_str(idx), v); } if (err < 0) { error("snd_config add: %s", snd_strerror(err)); return err; } } break; default: error("Unknown control type: %d\n", type); return -EINVAL; } return 0; }
/** * alsa dumy codec controls interface */ int dummy_alsa_control_raw(char * id_string , long vol, int rw, long * value){ int err; snd_hctl_t *hctl; snd_ctl_elem_id_t *id; snd_hctl_elem_t *elem; snd_ctl_elem_value_t *control; snd_ctl_elem_info_t *info; snd_ctl_elem_type_t type; unsigned int idx = 0, count; long tmp, min, max; char dev[10] = {0}; int card = alsa_get_aml_card(); int port = alsa_get_spdif_port(); adec_print("card = %d, port = %d\n", card, port); sprintf(dev, "hw:%d,%d", (card >= 0) ? card : 0, (port >= 0) ? port : 0); if ((err = snd_hctl_open(&hctl, dev, 0)) < 0) { printf("Control %s open error: %s\n", dev, snd_strerror(err)); return err; } if (err = snd_hctl_load(hctl)< 0) { printf("Control %s open error: %s\n", dev, snd_strerror(err)); return err; } snd_ctl_elem_id_alloca(&id); snd_ctl_elem_id_set_interface(id, SND_CTL_ELEM_IFACE_MIXER); snd_ctl_elem_id_set_name(id, id_string); elem = snd_hctl_find_elem(hctl, id); snd_ctl_elem_value_alloca(&control); snd_ctl_elem_value_set_id(control, id); snd_ctl_elem_info_alloca(&info); if ((err = snd_hctl_elem_info(elem, info)) < 0) { printf("Control %s snd_hctl_elem_info error: %s\n", dev, snd_strerror(err)); return err; } count = snd_ctl_elem_info_get_count(info); type = snd_ctl_elem_info_get_type(info); for (idx = 0; idx < count; idx++) { switch (type) { case SND_CTL_ELEM_TYPE_BOOLEAN: if(rw){ tmp = 0; if (vol >= 1) { tmp = 1; } snd_ctl_elem_value_set_boolean(control, idx, tmp); err = snd_hctl_elem_write(elem, control); }else *value = snd_ctl_elem_value_get_boolean(control, idx); break; case SND_CTL_ELEM_TYPE_INTEGER: if(rw){ min = snd_ctl_elem_info_get_min(info); max = snd_ctl_elem_info_get_max(info); if ((vol >= min) && (vol <= max)) tmp = vol; else if (vol < min) tmp = min; else if (vol > max) tmp = max; snd_ctl_elem_value_set_integer(control, idx, tmp); err = snd_hctl_elem_write(elem, control); }else *value = snd_ctl_elem_value_get_integer(control, idx); break; default: printf("?"); break; } if (err < 0){ printf ("control%s access error=%s,close control device\n", dev, snd_strerror(err)); snd_hctl_close(hctl); return err; } } return 0; }
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; }
void main( int argc, char *argv[] ) { struct structArgs cmdArgs; int errNum; // ************************************************************************ // ALSA control elements. // ************************************************************************ snd_ctl_t *ctl; // Simple control handle. snd_ctl_elem_id_t *id; // Simple control element id. snd_ctl_elem_value_t *control; // Simple control element value. snd_ctl_elem_type_t type; // Simple control element type. snd_ctl_elem_info_t *info; // Simple control info container. // ************************************************************************ // Get command line parameters. // ************************************************************************ argp_parse( &argp, argc, argv, 0, 0, &cmdArgs ); printf( "Card = %i\n", cmdArgs.card ); printf( "Control = %i\n", cmdArgs.control ); printf( "Value 1 = %i\n", cmdArgs.value1 ); printf( "Value 2 = %i\n", cmdArgs.value2 ); // ************************************************************************ // Set up ALSA control. // ************************************************************************ sprintf( cmdArgs.deviceID, "hw:%i", cmdArgs.card ); printf( "Device ID = %s.\n", cmdArgs.deviceID ); if ( snd_ctl_open( &ctl, cmdArgs.deviceID, 1 ) < 0 ) { printf( "Error opening control.\n" ); return; } // Initialise a simple control element id structure. snd_ctl_elem_id_alloca( &id ); snd_ctl_elem_id_set_numid( id, cmdArgs.control ); // Initialise info element. snd_ctl_elem_info_alloca( &info ); snd_ctl_elem_info_set_numid( info, cmdArgs.control ); // Is the control valid? if ( snd_ctl_elem_info( ctl, info ) < 0 ) { printf( "Error getting control element info.\n" ); return; } // Find type of control. // either: // SND_CTL_ELEM_TYPE_INTEGER, // SND_CTL_ELEM_TYPE_INTEGER64, // SND_CTL_ELEM_TYPE_ENUMERATED, etc. // Only interested in INTEGER. type = snd_ctl_elem_info_get_type( info ); if ( type != SND_CTL_ELEM_TYPE_INTEGER ) { printf( "Control type is not integer.\n" ); printf( "Type = %s\n", type ); return; } // ************************************************************************ // Get some information for selected control. // ************************************************************************ printf( "Min value for control = %d\n", snd_ctl_elem_info_get_min( info )); printf( "Max value for control = %d\n", snd_ctl_elem_info_get_max( info )); printf( "Step value for control = %d\n", snd_ctl_elem_info_get_step( info )); // Initialise the control element value container. snd_ctl_elem_value_alloca( &control ); snd_ctl_elem_value_set_id( control, id ); // ************************************************************************ // Set values for selected control. // ************************************************************************ snd_ctl_elem_value_set_integer( control, 0, cmdArgs.value1 ); if ( snd_ctl_elem_write( ctl, control ) < 0 ) printf( "Error setting L volume" ); else printf( "Set L volume to %d.\n", cmdArgs.value1 ); snd_ctl_elem_value_set_integer( control, 1, cmdArgs.value2 ); if ( snd_ctl_elem_write( ctl, control ) < 0 ) printf( "Error setting R volume" ); else printf( "Set R volume to %d.\n", cmdArgs.value2 ); // ************************************************************************ // Clean up. // ************************************************************************ snd_ctl_close( ctl ); return; }
int main() { int cardNumber = -1; int errNum; char *controlType; char deviceID[16]; // ------------------------------------------------------------------------ // ALSA control elements. // ------------------------------------------------------------------------ snd_ctl_t *ctl; // Simple control handle. snd_ctl_elem_id_t *id; // Simple control element id. snd_ctl_elem_value_t *control; // Simple control element value. snd_ctl_elem_type_t type; // Simple control element type. snd_ctl_elem_info_t *info; // Simple control element info container. snd_ctl_card_info_t *card; // Simple control card info container. snd_hctl_t *hctl; // High level control handle; snd_hctl_elem_t *elem; // High level control element handle. // ------------------------------------------------------------------------ // Initialise ALSA card and device types. // ------------------------------------------------------------------------ snd_ctl_card_info_alloca( &card ); snd_ctl_elem_value_alloca( &control ); snd_ctl_elem_id_alloca( &id ); snd_ctl_elem_info_alloca( &info ); // ------------------------------------------------------------------------ // Start card section. // ------------------------------------------------------------------------ // For each card. while (1) { // Find next card number. If < 0 then returns 1st card. errNum = snd_card_next( &cardNumber ); if (( errNum < 0 ) || ( cardNumber < 0 )) break; // Concatenate strings to get card's control interface. sprintf( deviceID, "hw:%i", cardNumber ); // Try to open card. if ( snd_ctl_open( &ctl, deviceID, 0 ) < 0 ) { printf( "Error opening card.\n" ); continue; } // Fill control card info element. if ( snd_ctl_card_info( ctl, card ) < 0 ) { printf( "Error getting card info.\n" ); continue; } // -------------------------------------------------------------------- // Print header block. // -------------------------------------------------------------------- printf( "\t+-----------------------------" ); printf( "-----------------------------+\n" ); printf( "\t| Card: %d - %-46s |", cardNumber, snd_ctl_card_info_get_name( card )); printf( "\n" ); printf( "\t+--------+------------" ); printf( "+------------------------------------+\n" ); printf( "\t| Device | Type " ); printf( "| Name |\n" ); printf( "\t+--------+------------" ); printf( "+------------------------------------+\n" ); // -------------------------------------------------------------------- // Start control section. // -------------------------------------------------------------------- // Open an empty high level control. if ( snd_hctl_open( &hctl, deviceID, 0 ) < 0 ) printf( "Error opening high level control.\n" ); // Load high level control element. if ( snd_hctl_load( hctl ) < 0 ) printf( "Error loading high level control.\n" ); // -------------------------------------------------------------------- // For each control element. // -------------------------------------------------------------------- for ( elem = snd_hctl_first_elem( hctl ); elem; elem = snd_hctl_elem_next( elem )) { // Get ID of high level control element. snd_hctl_elem_get_id( elem, id ); // ---------------------------------------------------------------- // Determine control type. // ---------------------------------------------------------------- if ( snd_hctl_elem_info( elem, info ) < 0 ) printf( "Can't get control information.\n" ); type = snd_ctl_elem_info_get_type( info ); switch ( type ) { case SND_CTL_ELEM_TYPE_NONE: controlType = "None"; break; case SND_CTL_ELEM_TYPE_BOOLEAN: controlType = "Boolean"; break; case SND_CTL_ELEM_TYPE_INTEGER: controlType = "Integer"; break; case SND_CTL_ELEM_TYPE_INTEGER64: controlType = "Integer64"; break; case SND_CTL_ELEM_TYPE_ENUMERATED: controlType = "Enumerated"; break; case SND_CTL_ELEM_TYPE_BYTES: controlType = "Bytes"; break; case SND_CTL_ELEM_TYPE_IEC958: controlType = "IEC958"; break; default: controlType = "Not Found"; break; } printf( "\t| %-6i | %-10s | %-34s |\n", snd_hctl_elem_get_numid( elem ), controlType, snd_hctl_elem_get_name( elem )); } printf( "\t+--------+------------" ); printf( "+------------------------------------+\n\n" ); // -------------------------------------------------------------------- // Tidy up. // -------------------------------------------------------------------- snd_hctl_close( hctl ); snd_ctl_close( ctl ); } return 0; }
status_t ALSAControl::get(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_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); 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; } snd_ctl_elem_info_get_id(info, id); snd_ctl_elem_value_set_id(control, id); ret = snd_ctl_elem_read(mHandle, control); if (ret < 0) { ALOGE("Control '%s' cannot read element value: %d", name, ret); return BAD_VALUE; } snd_ctl_elem_type_t type = snd_ctl_elem_info_get_type(info); switch (type) { 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: return BAD_VALUE; } return NO_ERROR; }
/** * \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; }