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output/srzip: Minor whitespace fixes.
[libsigrok.git] / src / output / srzip.c
1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
5  *
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.
10  *
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.
15  *
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/>.
18  */
19
20 #include <config.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <glib.h>
25 #include <glib/gstdio.h>
26 #include <zip.h>
27 #include <libsigrok/libsigrok.h>
28 #include "libsigrok-internal.h"
29
30 #define LOG_PREFIX "output/srzip"
31
32 struct out_context {
33         gboolean zip_created;
34         uint64_t samplerate;
35         char *filename;
36         gint min_analog_index;
37 };
38
39 static int init(struct sr_output *o, GHashTable *options)
40 {
41         struct out_context *outc;
42
43         (void)options;
44
45         if (!o->filename || o->filename[0] == '\0') {
46                 sr_info("srzip output module requires a file name, cannot save.");
47                 return SR_ERR_ARG;
48         }
49
50         outc = g_malloc0(sizeof(struct out_context));
51         outc->filename = g_strdup(o->filename);
52         o->priv = outc;
53
54         return SR_OK;
55 }
56
57 static int zip_create(const struct sr_output *o)
58 {
59         struct out_context *outc;
60         struct zip *zipfile;
61         struct zip_source *versrc, *metasrc;
62         struct sr_channel *ch;
63         GVariant *gvar;
64         GKeyFile *meta;
65         GSList *l;
66         const char *devgroup;
67         char *s, *metabuf;
68         gsize metalen;
69         guint logic_channels = 0, analog_channels = 0;
70
71         outc = o->priv;
72
73         if (outc->samplerate == 0 && sr_config_get(o->sdi->driver, o->sdi, NULL,
74                                         SR_CONF_SAMPLERATE, &gvar) == SR_OK) {
75                 outc->samplerate = g_variant_get_uint64(gvar);
76                 g_variant_unref(gvar);
77         }
78
79         /* Quietly delete it first, libzip wants replace ops otherwise. */
80         g_unlink(outc->filename);
81         zipfile = zip_open(outc->filename, ZIP_CREATE, NULL);
82         if (!zipfile)
83                 return SR_ERR;
84
85         /* "version" */
86         versrc = zip_source_buffer(zipfile, "2", 1, FALSE);
87         if (zip_add(zipfile, "version", versrc) < 0) {
88                 sr_err("Error saving version into zipfile: %s",
89                         zip_strerror(zipfile));
90                 zip_source_free(versrc);
91                 zip_discard(zipfile);
92                 return SR_ERR;
93         }
94
95         /* init "metadata" */
96         meta = g_key_file_new();
97
98         g_key_file_set_string(meta, "global", "sigrok version",
99                         SR_PACKAGE_VERSION_STRING);
100
101         devgroup = "device 1";
102         g_key_file_set_string(meta, devgroup, "capturefile", "logic-1");
103
104         s = sr_samplerate_string(outc->samplerate);
105         g_key_file_set_string(meta, devgroup, "samplerate", s);
106         g_free(s);
107
108         outc->min_analog_index = -1;
109
110         for (l = o->sdi->channels; l; l = l->next) {
111                 ch = l->data;
112                 switch (ch->type) {
113                 case SR_CHANNEL_LOGIC:
114                         logic_channels++;
115                         break;
116                 case SR_CHANNEL_ANALOG:
117                         if (outc->min_analog_index == -1 ||
118                                         ch->index < outc->min_analog_index)
119                                 outc->min_analog_index = ch->index;
120                         analog_channels++;
121                         break;
122                 }
123         }
124
125         g_key_file_set_integer(meta, devgroup, "total probes", logic_channels);
126         g_key_file_set_integer(meta, devgroup, "total analog", analog_channels);
127
128         for (l = o->sdi->channels; l; l = l->next) {
129                 ch = l->data;
130                 switch (ch->type) {
131                 case SR_CHANNEL_LOGIC:
132                         s = g_strdup_printf("probe%d", ch->index + 1);
133                         break;
134                 case SR_CHANNEL_ANALOG:
135                         s = g_strdup_printf("analog%d",
136                                         ch->index - outc->min_analog_index + 1);
137                         break;
138                 }
139                 if (ch->enabled)
140                         g_key_file_set_string(meta, devgroup, s, ch->name);
141                 g_free(s);
142         }
143
144         metabuf = g_key_file_to_data(meta, &metalen, NULL);
145         g_key_file_free(meta);
146
147         metasrc = zip_source_buffer(zipfile, metabuf, metalen, FALSE);
148         if (zip_add(zipfile, "metadata", metasrc) < 0) {
149                 sr_err("Error saving metadata into zipfile: %s",
150                         zip_strerror(zipfile));
151                 zip_source_free(metasrc);
152                 zip_discard(zipfile);
153                 g_free(metabuf);
154                 return SR_ERR;
155         }
156
157         if (zip_close(zipfile) < 0) {
158                 sr_err("Error saving zipfile: %s", zip_strerror(zipfile));
159                 zip_discard(zipfile);
160                 g_free(metabuf);
161                 return SR_ERR;
162         }
163         g_free(metabuf);
164
165         return SR_OK;
166 }
167
168 static int zip_append(const struct sr_output *o, unsigned char *buf,
169                 int unitsize, int length)
170 {
171         struct out_context *outc;
172         struct zip *archive;
173         struct zip_source *logicsrc;
174         int64_t i, num_files;
175         struct zip_stat zs;
176         struct zip_source *metasrc;
177         GKeyFile *kf;
178         GError *error;
179         uint64_t chunk_num;
180         const char *entry_name;
181         char *metabuf;
182         gsize metalen;
183         char *chunkname;
184         unsigned int next_chunk_num;
185
186         outc = o->priv;
187         if (!(archive = zip_open(outc->filename, 0, NULL)))
188                 return SR_ERR;
189
190         if (zip_stat(archive, "metadata", 0, &zs) < 0) {
191                 sr_err("Failed to open metadata: %s", zip_strerror(archive));
192                 zip_discard(archive);
193                 return SR_ERR;
194         }
195         kf = sr_sessionfile_read_metadata(archive, &zs);
196         if (!kf) {
197                 zip_discard(archive);
198                 return SR_ERR_DATA;
199         }
200         /*
201          * If the file was only initialized but doesn't yet have any
202          * data it in, it won't have a unitsize field in metadata yet.
203          */
204         error = NULL;
205         metabuf = NULL;
206         if (!g_key_file_has_key(kf, "device 1", "unitsize", &error)) {
207                 if (error && error->code != G_KEY_FILE_ERROR_KEY_NOT_FOUND) {
208                         sr_err("Failed to check unitsize key: %s", error->message);
209                         g_error_free(error);
210                         g_key_file_free(kf);
211                         zip_discard(archive);
212                         return SR_ERR;
213                 }
214                 g_clear_error(&error);
215
216                 /* Add unitsize field. */
217                 g_key_file_set_integer(kf, "device 1", "unitsize", unitsize);
218                 metabuf = g_key_file_to_data(kf, &metalen, NULL);
219                 metasrc = zip_source_buffer(archive, metabuf, metalen, FALSE);
220
221                 if (zip_replace(archive, zs.index, metasrc) < 0) {
222                         sr_err("Failed to replace metadata: %s",
223                                 zip_strerror(archive));
224                         g_key_file_free(kf);
225                         zip_source_free(metasrc);
226                         zip_discard(archive);
227                         g_free(metabuf);
228                         return SR_ERR;
229                 }
230         }
231         g_key_file_free(kf);
232
233         next_chunk_num = 1;
234         num_files = zip_get_num_entries(archive, 0);
235         for (i = 0; i < num_files; i++) {
236                 entry_name = zip_get_name(archive, i, 0);
237                 if (!entry_name || strncmp(entry_name, "logic-1", 7) != 0)
238                         continue;
239                 if (entry_name[7] == '\0') {
240                         /* This file has no extra chunks, just a single "logic-1".
241                          * Rename it to "logic-1-1" * and continue with chunk 2. */
242                         if (zip_rename(archive, i, "logic-1-1") < 0) {
243                                 sr_err("Failed to rename 'logic-1' to 'logic-1-1': %s",
244                                         zip_strerror(archive));
245                                 zip_discard(archive);
246                                 g_free(metabuf);
247                                 return SR_ERR;
248                         }
249                         next_chunk_num = 2;
250                         break;
251                 } else if (entry_name[7] == '-') {
252                         chunk_num = g_ascii_strtoull(entry_name + 8, NULL, 10);
253                         if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
254                                 next_chunk_num = chunk_num + 1;
255                 }
256         }
257
258         if (length % unitsize != 0) {
259                 sr_warn("Chunk size %d not a multiple of the"
260                         " unit size %d.", length, unitsize);
261         }
262         logicsrc = zip_source_buffer(archive, buf, length, FALSE);
263         chunkname = g_strdup_printf("logic-1-%u", next_chunk_num);
264         i = zip_add(archive, chunkname, logicsrc);
265         g_free(chunkname);
266         if (i < 0) {
267                 sr_err("Failed to add chunk 'logic-1-%u': %s",
268                         next_chunk_num, zip_strerror(archive));
269                 zip_source_free(logicsrc);
270                 zip_discard(archive);
271                 g_free(metabuf);
272                 return SR_ERR;
273         }
274         if (zip_close(archive) < 0) {
275                 sr_err("Error saving session file: %s", zip_strerror(archive));
276                 zip_discard(archive);
277                 g_free(metabuf);
278                 return SR_ERR;
279         }
280         g_free(metabuf);
281
282         return SR_OK;
283 }
284
285 static int zip_append_analog(const struct sr_output *o,
286                 const struct sr_datafeed_analog *analog)
287 {
288         struct out_context *outc;
289         struct zip *archive;
290         struct zip_source *analogsrc;
291         int64_t i, num_files;
292         struct zip_stat zs;
293         uint64_t chunk_num;
294         const char *entry_name;
295         char *basename;
296         gsize baselen;
297         struct sr_channel *channel;
298         float *chunkbuf;
299         gsize chunksize;
300         char *chunkname;
301         unsigned int next_chunk_num;
302
303         outc = o->priv;
304         if (!(archive = zip_open(outc->filename, 0, NULL)))
305                 return SR_ERR;
306
307         if (zip_stat(archive, "metadata", 0, &zs) < 0) {
308                 sr_err("Failed to open metadata: %s", zip_strerror(archive));
309                 zip_discard(archive);
310                 return SR_ERR;
311         }
312
313         /* TODO: support packets covering multiple channels */
314         if (g_slist_length(analog->meaning->channels) != 1) {
315                 sr_err("Analog packets covering multiple channels not supported yet");
316                 return SR_ERR;
317         }
318         channel = analog->meaning->channels->data;
319
320         basename = g_strdup_printf("analog-1-%u",
321                         channel->index - outc->min_analog_index + 1);
322         baselen = strlen(basename);
323         next_chunk_num = 1;
324         num_files = zip_get_num_entries(archive, 0);
325         for (i = 0; i < num_files; i++) {
326                 entry_name = zip_get_name(archive, i, 0);
327                 if (!entry_name || strncmp(entry_name, basename, baselen) != 0) {
328                         continue;
329                 } else if (entry_name[baselen] == '-') {
330                         chunk_num = g_ascii_strtoull(entry_name + baselen + 1, NULL, 10);
331                         if (chunk_num < G_MAXINT && chunk_num >= next_chunk_num)
332                                 next_chunk_num = chunk_num + 1;
333                 }
334         }
335
336         chunksize = sizeof(float) * analog->num_samples;
337         if (!(chunkbuf = g_try_malloc(chunksize)))
338                 return SR_ERR;
339         if (sr_analog_to_float(analog, chunkbuf) != SR_OK)
340                 return SR_ERR;
341
342         analogsrc = zip_source_buffer(archive, chunkbuf, chunksize, FALSE);
343         chunkname = g_strdup_printf("%s-%u", basename, next_chunk_num);
344         i = zip_add(archive, chunkname, analogsrc);
345         g_free(chunkname);
346         if (i < 0) {
347                 sr_err("Failed to add chunk '%s': %s", chunkname, zip_strerror(archive));
348                 zip_source_free(analogsrc);
349                 zip_discard(archive);
350                 return SR_ERR;
351         }
352         if (zip_close(archive) < 0) {
353                 sr_err("Error saving session file: %s", zip_strerror(archive));
354                 zip_discard(archive);
355                 return SR_ERR;
356         }
357
358         return SR_OK;
359 }
360
361 static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
362                 GString **out)
363 {
364         struct out_context *outc;
365         const struct sr_datafeed_meta *meta;
366         const struct sr_datafeed_logic *logic;
367         const struct sr_datafeed_analog *analog;
368         const struct sr_config *src;
369         GSList *l;
370
371         int ret;
372
373         *out = NULL;
374         if (!o || !o->sdi || !(outc = o->priv))
375                 return SR_ERR_ARG;
376
377         switch (packet->type) {
378         case SR_DF_META:
379                 meta = packet->payload;
380                 for (l = meta->config; l; l = l->next) {
381                         src = l->data;
382                         if (src->key != SR_CONF_SAMPLERATE)
383                                 continue;
384                         outc->samplerate = g_variant_get_uint64(src->data);
385                 }
386                 break;
387         case SR_DF_LOGIC:
388                 if (!outc->zip_created) {
389                         if ((ret = zip_create(o)) != SR_OK)
390                                 return ret;
391                         outc->zip_created = TRUE;
392                 }
393                 logic = packet->payload;
394                 ret = zip_append(o, logic->data, logic->unitsize, logic->length);
395                 if (ret != SR_OK)
396                         return ret;
397                 break;
398         case SR_DF_ANALOG:
399                 if (!outc->zip_created) {
400                         if ((ret = zip_create(o)) != SR_OK)
401                                 return ret;
402                         outc->zip_created = TRUE;
403                 }
404                 analog = packet->payload;
405                 ret = zip_append_analog(o, analog);
406                 if (ret != SR_OK)
407                         return ret;
408                 break;
409         }
410
411         return SR_OK;
412 }
413
414 static struct sr_option options[] = {
415         ALL_ZERO
416 };
417
418 static const struct sr_option *get_options(void)
419 {
420         if (!options[0].def)
421                 options[0].def = g_variant_ref_sink(g_variant_new_string(""));
422
423         return options;
424 }
425
426 static int cleanup(struct sr_output *o)
427 {
428         struct out_context *outc;
429
430         outc = o->priv;
431         g_variant_unref(options[0].def);
432         g_free(outc->filename);
433         g_free(outc);
434         o->priv = NULL;
435
436         return SR_OK;
437 }
438
439 SR_PRIV struct sr_output_module output_srzip = {
440         .id = "srzip",
441         .name = "srzip",
442         .desc = "srzip session file",
443         .exts = (const char*[]){"sr", NULL},
444         .flags = SR_OUTPUT_INTERNAL_IO_HANDLING,
445         .options = get_options,
446         .init = init,
447         .receive = receive,
448         .cleanup = cleanup,
449 };