2 * This file is part of the libsigrok project.
4 * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 #include "libsigrok.h"
22 #include "libsigrok-internal.h"
24 #define LOG_PREFIX "output"
29 * Output module handling.
33 * @defgroup grp_output Output modules
35 * Output module handling.
37 * libsigrok supports several output modules for file formats such as binary,
38 * VCD, gnuplot, and so on. It provides an output API that frontends can use.
39 * New output modules can be added/implemented in libsigrok without having
40 * to change the frontends at all.
42 * All output modules are fed data in a stream. Devices that can stream data
43 * into libsigrok, instead of storing and then transferring the whole buffer,
44 * can thus generate output live.
46 * Output modules generate a newly allocated GString. The caller is then
47 * expected to free this with g_string_free() when finished with it.
53 extern SR_PRIV struct sr_output_module output_bits;
54 extern SR_PRIV struct sr_output_module output_hex;
55 extern SR_PRIV struct sr_output_module output_ascii;
56 extern SR_PRIV struct sr_output_module output_binary;
57 extern SR_PRIV struct sr_output_module output_vcd;
58 extern SR_PRIV struct sr_output_module output_ols;
59 extern SR_PRIV struct sr_output_module output_gnuplot;
60 extern SR_PRIV struct sr_output_module output_chronovu_la8;
61 extern SR_PRIV struct sr_output_module output_csv;
62 extern SR_PRIV struct sr_output_module output_analog;
65 static const struct sr_output_module *output_module_list[] = {
80 * Returns a NULL-terminated list of all the available output modules.
84 SR_API const struct sr_output_module **sr_output_list(void)
86 return output_module_list;
90 * Returns the specified output module's ID.
94 SR_API const char *sr_output_id_get(const struct sr_output_module *o)
97 sr_err("Invalid output module NULL!");
105 * Returns the specified output module's name.
109 SR_API const char *sr_output_name_get(const struct sr_output_module *o)
112 sr_err("Invalid output module NULL!");
120 * Returns the specified output module's description.
124 SR_API const char *sr_output_description_get(const struct sr_output_module *o)
127 sr_err("Invalid output module NULL!");
135 * Return the output module with the specified ID, or NULL if no module
136 * with that id is found.
140 SR_API const struct sr_output_module *sr_output_find(char *id)
144 for (i = 0; output_module_list[i]; i++) {
145 if (!strcmp(output_module_list[i]->id, id))
146 return output_module_list[i];
153 * Returns a NULL-terminated array of struct sr_option, or NULL if the
154 * module takes no options.
156 * Each call to this function must be followed by a call to
157 * sr_output_options_free().
161 SR_API const struct sr_option *sr_output_options_get(const struct sr_output_module *o)
164 if (!o || !o->options)
167 return o->options(FALSE);
171 * After a call to sr_output_options_get(), this function cleans up all
172 * the resources allocated by that call.
176 SR_API void sr_output_options_free(const struct sr_output_module *o)
178 struct sr_option *opt;
180 if (!o || !o->options)
183 for (opt = o->options(TRUE); opt->id; opt++) {
185 g_variant_unref(opt->def);
190 g_slist_free_full(opt->values, (GDestroyNotify)g_variant_unref);
197 * Create a new output instance using the specified output module.
199 * <code>options</code> is a *HashTable with the keys corresponding with
200 * the module options' <code>id</code> field. The values should be GVariant
201 * pointers with sunk * references, of the same GVariantType as the option's
204 * The sr_dev_inst passed in can be used by the instance to determine
205 * channel names, samplerate, and so on.
209 SR_API const struct sr_output *sr_output_new(const struct sr_output_module *o,
210 GHashTable *options, const struct sr_dev_inst *sdi)
212 struct sr_output *op;
214 op = g_malloc(sizeof(struct sr_output));
217 if (op->module->init && op->module->init(op, options) != SR_OK) {
226 * Send a packet to the specified output instance.
228 * The instance's output is returned as a newly allocated GString,
229 * which must be freed by the caller.
233 SR_API int sr_output_send(const struct sr_output *o,
234 const struct sr_datafeed_packet *packet, GString **out)
236 return o->module->receive(o, packet, out);
240 * Free the specified output instance and all associated resources.
244 SR_API int sr_output_free(const struct sr_output *o)
252 if (o->module->cleanup)
253 ret = o->module->cleanup((struct sr_output *)o);