Parse private data and store for attachment to other objects. Data can come file or be locally defined as bytes, shorts or words.
Signed-off-by: Liam Girdwood liam.r.girdwood@linux.intel.com --- src/topology/data.c | 396 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 396 insertions(+) create mode 100644 src/topology/data.c
diff --git a/src/topology/data.c b/src/topology/data.c new file mode 100644 index 0000000..ae66472 --- /dev/null +++ b/src/topology/data.c @@ -0,0 +1,396 @@ +/* + Copyright(c) 2014-2015 Intel Corporation + All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of version 2 of the GNU General Public License as + published by the Free Software Foundation. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. + + Authors: Mengdong Lin mengdong.lin@intel.com + Yao Jin yao.jin@intel.com + Liam Girdwood liam.r.girdwood@linux.intel.com +*/ + +#include "list.h" +#include "tplg_local.h" + +/* Get Private data from a file. */ +static int tplg_parse_data_file(snd_config_t *cfg, struct tplg_elem *elem) +{ + struct snd_soc_tplg_private *priv = NULL; + const char *value = NULL; + char filename[MAX_FILE]; + char *env = getenv(ALSA_CONFIG_TPLG_VAR); + FILE *fp; + size_t size, bytes_read; + int ret = 0; + + tplg_dbg("data DataFile: %s\n", elem->id); + + if (snd_config_get_string(cfg, &value) < 0) + return -EINVAL; + + /* prepend alsa config directory to path */ + snprintf(filename, sizeof(filename), "%s/%s", + env ? env : ALSA_TPLG_DIR, value); + + fp = fopen(filename, "r"); + if (fp == NULL) { + SNDERR("error: invalid data file path '%s'\n", + filename); + ret = -errno; + goto err; + } + + fseek(fp, 0L, SEEK_END); + size = ftell(fp); + fseek(fp, 0L, SEEK_SET); + if (size <= 0) { + SNDERR("error: invalid data file size %zu\n", size); + ret = -EINVAL; + goto err; + } + if (size > TPLG_MAX_PRIV_SIZE) { + SNDERR("error: data file too big %zu\n", size); + ret = -EINVAL; + goto err; + } + + priv = calloc(1, sizeof(*priv) + size); + if (!priv) { + ret = -ENOMEM; + goto err; + } + + bytes_read = fread(&priv->data, 1, size, fp); + if (bytes_read != size) { + ret = -errno; + goto err; + } + + elem->data = priv; + priv->size = size; + elem->size = sizeof(*priv) + size; + return 0; + +err: + if (priv) + free(priv); + return ret; +} + +static void dump_priv_data(struct tplg_elem *elem) +{ + struct snd_soc_tplg_private *priv = elem->data; + unsigned char *p = (unsigned char *)priv->data; + unsigned int i, j = 0; + + tplg_dbg(" elem size = %d, priv data size = %d\n", + elem->size, priv->size); + + for (i = 0; i < priv->size; i++) { + if (j++ % 8 == 0) + tplg_dbg("\n"); + + tplg_dbg(" 0x%x", *p++); + } + + tplg_dbg("\n\n"); +} + +/* get number of hex value elements in CSV list */ +static int get_hex_num(const char *str) +{ + int commas = 0, values = 0, len = strlen(str); + const char *end = str + len; + + /* we expect "0x0, 0x0, 0x0" */ + while (str < end) { + + /* skip white space */ + if (isspace(*str)) { + str++; + continue; + } + + /* find delimeters */ + if (*str == ',') { + commas++; + str++; + continue; + } + + /* find 0x[0-9] values */ + if (*str == '0' && str + 2 <= end) { + if (str[1] == 'x' && str[2] >= '0' && str[2] <= 'f') { + values++; + str += 3; + } else { + str++; + } + } + + str++; + } + + /* there should always be one less comma than value */ + if (values -1 != commas) + return -EINVAL; + + return values; +} + +static int write_hex(char *buf, char *str, int width) +{ + long val; + void *p = &val; + + errno = 0; + val = strtol(str, NULL, 16); + + if ((errno == ERANGE && (val == LONG_MAX || val == LONG_MIN)) + || (errno != 0 && val == 0)) { + return -EINVAL; + } + + switch (width) { + case 1: + *(unsigned char *)buf = *(unsigned char *)p; + break; + case 2: + *(unsigned short *)buf = *(unsigned short *)p; + break; + case 4: + *(unsigned int *)buf = *(unsigned int *)p; + break; + default: + return -EINVAL; + } + + return 0; +} + +static int copy_data_hex(char *data, int off, const char *str, int width) +{ + char *tmp, *s = NULL, *p = data; + int ret; + + tmp = strdup(str); + if (tmp == NULL) + return -ENOMEM; + + p += off; + s = strtok(tmp, ","); + + while (s != NULL) { + ret = write_hex(p, s, width); + if (ret < 0) { + free(tmp); + return ret; + } + + s = strtok(NULL, ","); + p += width; + } + + free(tmp); + return 0; +} + +static int tplg_parse_data_hex(snd_config_t *cfg, struct tplg_elem *elem, + int width) +{ + struct snd_soc_tplg_private *priv; + const char *value = NULL; + int size, esize, off, num; + int ret; + + tplg_dbg(" data: %s\n", elem->id); + + if (snd_config_get_string(cfg, &value) < 0) + return -EINVAL; + + num = get_hex_num(value); + if (num <= 0) { + SNDERR("error: malformed hex variable list %s\n", value); + return -EINVAL; + } + + size = num * width; + priv = elem->data; + + if (esize > TPLG_MAX_PRIV_SIZE) { + SNDERR("error: data too big %d\n", esize); + return -EINVAL; + } + + if (priv != NULL) { + off = priv->size; + esize = elem->size + size; + priv = realloc(priv, esize); + } else { + off = 0; + esize = sizeof(*priv) + size; + priv = calloc(1, esize); + } + + if (!priv) + return -ENOMEM; + + elem->data = priv; + priv->size += size; + elem->size = esize; + + ret = copy_data_hex(priv->data, off, value, width); + + dump_priv_data(elem); + return ret; +} + + +/* Parse Private data. + * + * Object private data can either be from file or defined as bytes, shorts, + * words. + */ +int tplg_parse_data(snd_tplg_t *tplg, snd_config_t *cfg, + void *private ATTRIBUTE_UNUSED) +{ + snd_config_iterator_t i, next; + snd_config_t *n; + const char *id, *val = NULL; + int err = 0; + struct tplg_elem *elem; + + elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_DATA); + if (!elem) + return -ENOMEM; + + snd_config_for_each(i, next, cfg) { + + n = snd_config_iterator_entry(i); + if (snd_config_get_id(n, &id) < 0) { + continue; + } + + if (strcmp(id, "file") == 0) { + err = tplg_parse_data_file(n, elem); + if (err < 0) { + SNDERR("error: failed to parse data file\n"); + return err; + } + continue; + } + + if (strcmp(id, "bytes") == 0) { + err = tplg_parse_data_hex(n, elem, 1); + if (err < 0) { + SNDERR("error: failed to parse data bytes\n"); + return err; + } + continue; + } + + if (strcmp(id, "shorts") == 0) { + err = tplg_parse_data_hex(n, elem, 2); + if (err < 0) { + SNDERR("error: failed to parse data shorts\n"); + return err; + } + continue; + } + + if (strcmp(id, "words") == 0) { + err = tplg_parse_data_hex(n, elem, 4); + if (err < 0) { + SNDERR("error: failed to parse data words\n"); + return err; + } + continue; + } + + if (strcmp(id, "index") == 0) { + if (snd_config_get_string(n, &val) < 0) + return -EINVAL; + + elem->index = atoi(val); + tplg_dbg("\t%s: %d\n", id, elem->index); + continue; + } + + if (strcmp(id, "type") == 0) { + if (snd_config_get_string(n, &val) < 0) + return -EINVAL; + + elem->vendor_type = atoi(val); + tplg_dbg("\t%s: %d\n", id, elem->index); + continue; + } + } + + return err; +} + +/* copy private data into the bytes extended control */ +int tplg_copy_data(struct tplg_elem *elem, struct tplg_elem *ref) +{ + struct snd_soc_tplg_private *priv; + int priv_data_size; + + if (!ref) + return -EINVAL; + + tplg_dbg("Data '%s' used by '%s'\n", ref->id, elem->id); + priv_data_size = ref->data->size; + + switch (elem->type) { + case OBJECT_TYPE_MIXER: + elem->mixer_ctrl = realloc(elem->mixer_ctrl, + elem->size + priv_data_size); + if (!elem->mixer_ctrl) + return -ENOMEM; + priv = &elem->mixer_ctrl->priv; + break; + + case OBJECT_TYPE_ENUM: + elem->enum_ctrl = realloc(elem->enum_ctrl, + elem->size + priv_data_size); + if (!elem->enum_ctrl) + return -ENOMEM; + priv = &elem->enum_ctrl->priv; + break; + + case OBJECT_TYPE_BYTES: + elem->bytes_ext = realloc(elem->bytes_ext, + elem->size + priv_data_size); + if (!elem->bytes_ext) + return -ENOMEM; + priv = &elem->bytes_ext->priv; + break; + + + case OBJECT_TYPE_DAPM_WIDGET: + elem->widget = realloc(elem->widget, + elem->size + priv_data_size); + if (!elem->widget) + return -ENOMEM; + priv = &elem->widget->priv; + break; + + default: + SNDERR("elem '%s': type %d private data not supported \n", + elem->id, elem->type); + return -EINVAL; + } + + elem->size += priv_data_size; + priv->size = priv_data_size; + ref->compound_elem = 1; + memcpy(priv->data, ref->data->data, priv_data_size); + return 0; +}