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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 <config.h> | |
21 | #include <stdlib.h> | |
22 | #include <sys/types.h> | |
23 | #include <sys/stat.h> | |
24 | #include <fcntl.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/time.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | #define LOG_PREFIX "input/binary" | |
31 | ||
32 | #define MAX_CHUNK_SIZE 4096 | |
33 | #define DEFAULT_NUM_CHANNELS 8 | |
34 | #define DEFAULT_SAMPLERATE 0 | |
35 | ||
36 | struct context { | |
37 | gboolean started; | |
38 | uint64_t samplerate; | |
39 | }; | |
40 | ||
41 | static int init(struct sr_input *in, GHashTable *options) | |
42 | { | |
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 = g_malloc0(sizeof(struct sr_dev_inst)); | |
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 | sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, name); | |
61 | } | |
62 | ||
63 | return SR_OK; | |
64 | } | |
65 | ||
66 | static int process_buffer(struct sr_input *in) | |
67 | { | |
68 | struct sr_datafeed_packet packet; | |
69 | struct sr_datafeed_meta meta; | |
70 | struct sr_datafeed_logic logic; | |
71 | struct sr_config *src; | |
72 | struct context *inc; | |
73 | gsize chunk_size, i; | |
74 | int chunk; | |
75 | ||
76 | inc = in->priv; | |
77 | if (!inc->started) { | |
78 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
79 | ||
80 | if (inc->samplerate) { | |
81 | packet.type = SR_DF_META; | |
82 | packet.payload = &meta; | |
83 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate)); | |
84 | meta.config = g_slist_append(NULL, src); | |
85 | sr_session_send(in->sdi, &packet); | |
86 | sr_config_free(src); | |
87 | } | |
88 | ||
89 | inc->started = TRUE; | |
90 | } | |
91 | ||
92 | packet.type = SR_DF_LOGIC; | |
93 | packet.payload = &logic; | |
94 | logic.unitsize = (g_slist_length(in->sdi->channels) + 7) / 8; | |
95 | ||
96 | /* Cut off at multiple of unitsize. */ | |
97 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; | |
98 | ||
99 | for (i = 0; i < chunk_size; i += chunk) { | |
100 | logic.data = in->buf->str + i; | |
101 | chunk = MIN(MAX_CHUNK_SIZE, chunk_size - i); | |
102 | logic.length = chunk; | |
103 | sr_session_send(in->sdi, &packet); | |
104 | } | |
105 | g_string_erase(in->buf, 0, chunk_size); | |
106 | ||
107 | return SR_OK; | |
108 | } | |
109 | ||
110 | static int receive(struct sr_input *in, GString *buf) | |
111 | { | |
112 | int ret; | |
113 | ||
114 | g_string_append_len(in->buf, buf->str, buf->len); | |
115 | ||
116 | if (!in->sdi_ready) { | |
117 | /* sdi is ready, notify frontend. */ | |
118 | in->sdi_ready = TRUE; | |
119 | return SR_OK; | |
120 | } | |
121 | ||
122 | ret = process_buffer(in); | |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
127 | static int end(struct sr_input *in) | |
128 | { | |
129 | struct context *inc; | |
130 | struct sr_datafeed_packet packet; | |
131 | int ret; | |
132 | ||
133 | if (in->sdi_ready) | |
134 | ret = process_buffer(in); | |
135 | else | |
136 | ret = SR_OK; | |
137 | ||
138 | inc = in->priv; | |
139 | if (inc->started) { | |
140 | packet.type = SR_DF_END; | |
141 | sr_session_send(in->sdi, &packet); | |
142 | } | |
143 | ||
144 | return ret; | |
145 | } | |
146 | ||
147 | static struct sr_option options[] = { | |
148 | { "numchannels", "Number of channels", "Number of channels", NULL, NULL }, | |
149 | { "samplerate", "Sample rate", "Sample rate", NULL, NULL }, | |
150 | ALL_ZERO | |
151 | }; | |
152 | ||
153 | static struct sr_option *get_options(void) | |
154 | { | |
155 | if (!options[0].def) { | |
156 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
157 | options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE)); | |
158 | } | |
159 | ||
160 | return options; | |
161 | } | |
162 | ||
163 | SR_PRIV struct sr_input_module input_binary = { | |
164 | .id = "binary", | |
165 | .name = "Binary", | |
166 | .desc = "Raw binary", | |
167 | .exts = NULL, | |
168 | .options = get_options, | |
169 | .init = init, | |
170 | .receive = receive, | |
171 | .end = end, | |
172 | }; |