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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 CHUNK_SIZE (4 * 1024 * 1024) | |
33 | #define DEFAULT_NUM_CHANNELS 8 | |
34 | #define DEFAULT_SAMPLERATE 0 | |
35 | ||
36 | struct context { | |
37 | gboolean started; | |
38 | uint64_t samplerate; | |
39 | uint16_t unitsize; | |
40 | }; | |
41 | ||
42 | static int init(struct sr_input *in, GHashTable *options) | |
43 | { | |
44 | struct context *inc; | |
45 | int num_channels, i; | |
46 | char name[16]; | |
47 | ||
48 | num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
49 | if (num_channels < 1) { | |
50 | sr_err("Invalid value for numchannels: must be at least 1."); | |
51 | return SR_ERR_ARG; | |
52 | } | |
53 | ||
54 | in->sdi = g_malloc0(sizeof(struct sr_dev_inst)); | |
55 | in->priv = inc = g_malloc0(sizeof(struct context)); | |
56 | ||
57 | inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate")); | |
58 | ||
59 | for (i = 0; i < num_channels; i++) { | |
60 | snprintf(name, sizeof(name), "%d", i); | |
61 | sr_channel_new(in->sdi, i, SR_CHANNEL_LOGIC, TRUE, name); | |
62 | } | |
63 | ||
64 | inc->unitsize = (g_slist_length(in->sdi->channels) + 7) / 8; | |
65 | ||
66 | return SR_OK; | |
67 | } | |
68 | ||
69 | static int process_buffer(struct sr_input *in) | |
70 | { | |
71 | struct sr_datafeed_packet packet; | |
72 | struct sr_datafeed_logic logic; | |
73 | struct context *inc; | |
74 | gsize chunk_size, i; | |
75 | int chunk; | |
76 | ||
77 | inc = in->priv; | |
78 | if (!inc->started) { | |
79 | std_session_send_df_header(in->sdi); | |
80 | ||
81 | if (inc->samplerate) { | |
82 | (void)sr_session_send_meta(in->sdi, SR_CONF_SAMPLERATE, | |
83 | g_variant_new_uint64(inc->samplerate)); | |
84 | } | |
85 | ||
86 | inc->started = TRUE; | |
87 | } | |
88 | ||
89 | packet.type = SR_DF_LOGIC; | |
90 | packet.payload = &logic; | |
91 | logic.unitsize = inc->unitsize; | |
92 | ||
93 | /* Cut off at multiple of unitsize. */ | |
94 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; | |
95 | ||
96 | for (i = 0; i < chunk_size; i += chunk) { | |
97 | logic.data = in->buf->str + i; | |
98 | chunk = MIN(CHUNK_SIZE, chunk_size - i); | |
99 | chunk /= logic.unitsize; | |
100 | chunk *= logic.unitsize; | |
101 | logic.length = chunk; | |
102 | sr_session_send(in->sdi, &packet); | |
103 | } | |
104 | g_string_erase(in->buf, 0, chunk_size); | |
105 | ||
106 | return SR_OK; | |
107 | } | |
108 | ||
109 | static int receive(struct sr_input *in, GString *buf) | |
110 | { | |
111 | int ret; | |
112 | ||
113 | g_string_append_len(in->buf, buf->str, buf->len); | |
114 | ||
115 | if (!in->sdi_ready) { | |
116 | /* sdi is ready, notify frontend. */ | |
117 | in->sdi_ready = TRUE; | |
118 | return SR_OK; | |
119 | } | |
120 | ||
121 | ret = process_buffer(in); | |
122 | ||
123 | return ret; | |
124 | } | |
125 | ||
126 | static int end(struct sr_input *in) | |
127 | { | |
128 | struct context *inc; | |
129 | int ret; | |
130 | ||
131 | if (in->sdi_ready) | |
132 | ret = process_buffer(in); | |
133 | else | |
134 | ret = SR_OK; | |
135 | ||
136 | inc = in->priv; | |
137 | if (inc->started) | |
138 | std_session_send_df_end(in->sdi); | |
139 | ||
140 | return ret; | |
141 | } | |
142 | ||
143 | static int reset(struct sr_input *in) | |
144 | { | |
145 | struct context *inc = in->priv; | |
146 | ||
147 | inc->started = FALSE; | |
148 | g_string_truncate(in->buf, 0); | |
149 | ||
150 | return SR_OK; | |
151 | } | |
152 | ||
153 | static struct sr_option options[] = { | |
154 | { "numchannels", "Number of logic channels", "The number of (logic) channels in the data", NULL, NULL }, | |
155 | { "samplerate", "Sample rate (Hz)", "The sample rate of the (logic) data in Hz", NULL, NULL }, | |
156 | ALL_ZERO | |
157 | }; | |
158 | ||
159 | static const struct sr_option *get_options(void) | |
160 | { | |
161 | if (!options[0].def) { | |
162 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
163 | options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE)); | |
164 | } | |
165 | ||
166 | return options; | |
167 | } | |
168 | ||
169 | SR_PRIV struct sr_input_module input_binary = { | |
170 | .id = "binary", | |
171 | .name = "Binary", | |
172 | .desc = "Raw binary logic data", | |
173 | .exts = NULL, | |
174 | .options = get_options, | |
175 | .init = init, | |
176 | .receive = receive, | |
177 | .end = end, | |
178 | .reset = reset, | |
179 | }; |