]>
Commit | Line | Data |
---|---|---|
1 | /* | |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2011 Uwe Hermann <uwe@hermann-uwe.de> | |
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 2 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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <stdlib.h> | |
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
24 | #include <sys/stat.h> | |
25 | #include "libsigrok.h" | |
26 | #include "libsigrok-internal.h" | |
27 | ||
28 | #define LOG_PREFIX "input/chronovu-la8" | |
29 | ||
30 | #define DEFAULT_NUM_CHANNELS 8 | |
31 | #define DEFAULT_SAMPLERATE 100000000L | |
32 | #define MAX_CHUNK_SIZE 4096 | |
33 | #define CHRONOVU_LA8_FILESIZE 8 * 1024 * 1024 + 5 | |
34 | ||
35 | struct context { | |
36 | gboolean started; | |
37 | uint64_t samplerate; | |
38 | }; | |
39 | ||
40 | static int format_match(GHashTable *metadata) | |
41 | { | |
42 | int size; | |
43 | ||
44 | size = GPOINTER_TO_INT(g_hash_table_lookup(metadata, | |
45 | GINT_TO_POINTER(SR_INPUT_META_FILESIZE))); | |
46 | if (size == CHRONOVU_LA8_FILESIZE) | |
47 | return SR_OK; | |
48 | ||
49 | return SR_ERR; | |
50 | } | |
51 | ||
52 | static int init(struct sr_input *in, GHashTable *options) | |
53 | { | |
54 | struct sr_channel *ch; | |
55 | struct context *inc; | |
56 | int num_channels, i; | |
57 | char name[16]; | |
58 | ||
59 | num_channels = g_variant_get_int32(g_hash_table_lookup(options, "numchannels")); | |
60 | if (num_channels < 1) { | |
61 | sr_err("Invalid value for numchannels: must be at least 1."); | |
62 | return SR_ERR_ARG; | |
63 | } | |
64 | ||
65 | in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL); | |
66 | in->priv = inc = g_malloc0(sizeof(struct context)); | |
67 | ||
68 | inc->samplerate = g_variant_get_uint64(g_hash_table_lookup(options, "samplerate")); | |
69 | ||
70 | for (i = 0; i < num_channels; i++) { | |
71 | snprintf(name, 16, "%d", i); | |
72 | ch = sr_channel_new(i, SR_CHANNEL_LOGIC, TRUE, name); | |
73 | in->sdi->channels = g_slist_append(in->sdi->channels, ch); | |
74 | } | |
75 | ||
76 | return SR_OK; | |
77 | } | |
78 | ||
79 | static int receive(const struct sr_input *in, GString *buf) | |
80 | { | |
81 | struct sr_datafeed_packet packet; | |
82 | struct sr_datafeed_meta meta; | |
83 | struct sr_datafeed_logic logic; | |
84 | struct sr_config *src; | |
85 | struct context *inc; | |
86 | gsize chunk_size, i; | |
87 | int chunk, num_channels; | |
88 | ||
89 | inc = in->priv; | |
90 | ||
91 | g_string_append_len(in->buf, buf->str, buf->len); | |
92 | ||
93 | num_channels = g_slist_length(in->sdi->channels); | |
94 | ||
95 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
96 | inc->started = TRUE; | |
97 | ||
98 | packet.type = SR_DF_META; | |
99 | packet.payload = &meta; | |
100 | src = sr_config_new(SR_CONF_SAMPLERATE, g_variant_new_uint64(inc->samplerate)); | |
101 | meta.config = g_slist_append(NULL, src); | |
102 | sr_session_send(in->sdi, &packet); | |
103 | sr_config_free(src); | |
104 | ||
105 | packet.type = SR_DF_LOGIC; | |
106 | packet.payload = &logic; | |
107 | logic.unitsize = (num_channels + 7) / 8; | |
108 | logic.data = in->buf->str; | |
109 | ||
110 | /* Cut off at multiple of unitsize. */ | |
111 | chunk_size = in->buf->len / logic.unitsize * logic.unitsize; | |
112 | ||
113 | chunk = 0; | |
114 | for (i = 0; i < chunk_size; i += chunk) { | |
115 | chunk = MAX(MAX_CHUNK_SIZE, chunk_size - i); | |
116 | logic.length = chunk; | |
117 | sr_session_send(in->sdi, &packet); | |
118 | } | |
119 | ||
120 | if (in->buf->len > chunk_size) | |
121 | g_string_erase(in->buf, 0, in->buf->len - chunk_size); | |
122 | ||
123 | return SR_OK; | |
124 | } | |
125 | ||
126 | static int cleanup(struct sr_input *in) | |
127 | { | |
128 | struct sr_datafeed_packet packet; | |
129 | struct context *inc; | |
130 | ||
131 | inc = in->priv; | |
132 | ||
133 | if (inc->started) { | |
134 | packet.type = SR_DF_END; | |
135 | sr_session_send(in->sdi, &packet); | |
136 | } | |
137 | g_free(in->priv); | |
138 | in->priv = NULL; | |
139 | ||
140 | return SR_OK; | |
141 | } | |
142 | ||
143 | static struct sr_option options[] = { | |
144 | { "numchannels", "Number of channels", "Number of channels", NULL, NULL }, | |
145 | { "samplerate", "Sample rate", "Sample rate", NULL, NULL }, | |
146 | ALL_ZERO | |
147 | }; | |
148 | ||
149 | static struct sr_option *get_options(void) | |
150 | { | |
151 | if (!options[0].def) { | |
152 | options[0].def = g_variant_ref_sink(g_variant_new_int32(DEFAULT_NUM_CHANNELS)); | |
153 | options[1].def = g_variant_ref_sink(g_variant_new_uint64(DEFAULT_SAMPLERATE)); | |
154 | } | |
155 | ||
156 | return options; | |
157 | } | |
158 | ||
159 | SR_PRIV struct sr_input_module input_chronovu_la8 = { | |
160 | .id = "chronovu-la8", | |
161 | .name = "Chronovu-LA8", | |
162 | .desc = "ChronoVu LA8", | |
163 | .metadata = { SR_INPUT_META_FILESIZE | SR_INPUT_META_REQUIRED }, | |
164 | .options = get_options, | |
165 | .format_match = format_match, | |
166 | .init = init, | |
167 | .receive = receive, | |
168 | .cleanup = cleanup, | |
169 | }; |