]> sigrok.org Git - libsigrok.git/blob - src/input/binary.c
Removal of sdi->index, step 3: sr_dev_inst_new() calls for input mods
[libsigrok.git] / src / input / binary.c
1 /*
2  * This file is part of the libsigrok project.
3  *
4  * Copyright (C) 2013 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 <stdlib.h>
21 #include <sys/types.h>
22 #include <sys/stat.h>
23 #include <fcntl.h>
24 #include <unistd.h>
25 #include <sys/time.h>
26 #include "libsigrok.h"
27 #include "libsigrok-internal.h"
28
29 #define LOG_PREFIX "input/binary"
30
31 #define MAX_CHUNK_SIZE        4096
32 #define DEFAULT_NUM_CHANNELS  8
33 #define DEFAULT_SAMPLERATE    0
34
35 struct context {
36         gboolean started;
37         uint64_t samplerate;
38 };
39
40 static int init(struct sr_input *in, GHashTable *options)
41 {
42         struct sr_channel *ch;
43         struct context *inc;
44         int num_channels, i;
45         char name[16];
46
47         num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels"));
48         if (num_channels < 1) {
49                 sr_err("Invalid value for numchannels: must be at least 1.");
50                 return SR_ERR_ARG;
51         }
52
53         in->sdi = sr_dev_inst_new(SR_ST_ACTIVE, NULL, NULL, NULL);
54         in->priv = inc = g_malloc0(sizeof(struct context));
55
56         inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate"));
57
58         for (i = 0; i < num_channels; i++) {
59                 snprintf(name, 16, "%d", i);
60                 ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name);
61                 in->sdi->channels = g_slist_append(in->sdi->channels, ch);
62         }
63
64         return SR_OK;
65 }
66
67 static int receive(const struct sr_input *in, GString *buf)
68 {
69         struct sr_datafeed_packet packet;
70         struct sr_datafeed_meta meta;
71         struct sr_datafeed_logic logic;
72         struct sr_config *src;
73         struct context *inc;
74         gsize chunk_size, i;
75         int chunk, num_channels;
76
77         inc = in->priv;
78
79         g_string_append_len(in->buf, buf->str, buf->len);
80
81         num_channels = g_slist_length(in->sdi->channels);
82
83         if (!inc->started) {
84                 std_session_send_df_header(in->sdi, LOG_PREFIX);
85                 inc->started = TRUE;
86
87                 packet.type = SR_DF_META;
88                 packet.payload = &meta;
89                 src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate));
90                 meta.config = g_slist_append(NULL, src);
91                 sr_session_send(in->sdi, &packet);
92                 sr_config_free(src);
93         }
94
95         packet.type = SR_DF_LOGIC;
96         packet.payload = &logic;
97         logic.unitsize = (num_channels + 7) / 8;
98
99         /* Cut off at multiple of unitsize. */
100         chunk_size = in->buf->len / logic.unitsize * logic.unitsize;
101
102         chunk = 0;
103         for (i = 0; i < chunk_size; i += chunk) {
104                 logic.data = in->buf->str + i;
105                 chunk = MIN(MAX_CHUNK_SIZE, chunk_size - i);
106                 logic.length = chunk;
107                 sr_session_send(in->sdi, &packet);
108         }
109         g_string_erase(in->buf, 0, chunk_size);
110
111         return SR_OK;
112 }
113
114 static int cleanup(struct sr_input *in)
115 {
116         struct sr_datafeed_packet packet;
117         struct context *inc;
118
119         inc = in->priv;
120
121         if (inc->started) {
122                 packet.type = SR_DF_END;
123                 sr_session_send(in->sdi, &packet);
124         }
125         g_free(in->priv);
126         in->priv = NULL;
127
128         return SR_OK;
129 }
130
131 static struct sr_option options[] = {
132         { "numchannels", "Number of channels", "Number of channels", NULL, NULL },
133         { "samplerate", "Sample rate", "Sample rate", NULL, NULL },
134         ALL_ZERO
135 };
136
137 static struct sr_option *get_options(void)
138 {
139         if (!options[0].def) {
140                 options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS));
141                 options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE));
142         }
143
144         return options;
145 }
146
147 SR_PRIV struct sr_input_module input_binary = {
148         .id = "binary",
149         .name = "Binary",
150         .desc = "Raw binary",
151         .options = get_options,
152         .init = init,
153         .receive = receive,
154         .cleanup = cleanup,
155 };