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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 <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 | /* Message logging helpers with subsystem-specific prefix string. */ | |
30 | #define LOG_PREFIX "input/binary: " | |
31 | #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args) | |
32 | #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args) | |
33 | #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args) | |
34 | #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args) | |
35 | #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args) | |
36 | #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args) | |
37 | ||
38 | #define CHUNKSIZE (512 * 1024) | |
39 | #define DEFAULT_NUM_PROBES 8 | |
40 | ||
41 | struct context { | |
42 | uint64_t samplerate; | |
43 | }; | |
44 | ||
45 | static int format_match(const char *filename) | |
46 | { | |
47 | (void)filename; | |
48 | ||
49 | /* This module will handle anything you throw at it. */ | |
50 | return TRUE; | |
51 | } | |
52 | ||
53 | static int init(struct sr_input *in, const char *filename) | |
54 | { | |
55 | struct sr_probe *probe; | |
56 | int num_probes, i; | |
57 | char name[SR_MAX_PROBENAME_LEN + 1]; | |
58 | char *param; | |
59 | struct context *ctx; | |
60 | ||
61 | (void)filename; | |
62 | ||
63 | if (!(ctx = g_try_malloc0(sizeof(*ctx)))) { | |
64 | sr_err("Input format context malloc failed."); | |
65 | return SR_ERR_MALLOC; | |
66 | } | |
67 | ||
68 | num_probes = DEFAULT_NUM_PROBES; | |
69 | ctx->samplerate = 0; | |
70 | ||
71 | if (in->param) { | |
72 | param = g_hash_table_lookup(in->param, "numprobes"); | |
73 | if (param) { | |
74 | num_probes = strtoul(param, NULL, 10); | |
75 | if (num_probes < 1) | |
76 | return SR_ERR; | |
77 | } | |
78 | ||
79 | param = g_hash_table_lookup(in->param, "samplerate"); | |
80 | if (param) { | |
81 | if (sr_parse_sizestring(param, &ctx->samplerate) != SR_OK) | |
82 | return SR_ERR; | |
83 | } | |
84 | } | |
85 | ||
86 | /* Create a virtual device. */ | |
87 | in->sdi = sr_dev_inst_new(0, SR_ST_ACTIVE, NULL, NULL, NULL); | |
88 | in->internal = ctx; | |
89 | ||
90 | for (i = 0; i < num_probes; i++) { | |
91 | snprintf(name, SR_MAX_PROBENAME_LEN, "%d", i); | |
92 | /* TODO: Check return value. */ | |
93 | if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE, name))) | |
94 | return SR_ERR; | |
95 | in->sdi->probes = g_slist_append(in->sdi->probes, probe); | |
96 | } | |
97 | ||
98 | return SR_OK; | |
99 | } | |
100 | ||
101 | static int loadfile(struct sr_input *in, const char *filename) | |
102 | { | |
103 | struct sr_datafeed_packet packet; | |
104 | struct sr_datafeed_meta meta; | |
105 | struct sr_datafeed_logic logic; | |
106 | struct sr_config *src; | |
107 | unsigned char buffer[CHUNKSIZE]; | |
108 | int fd, size, num_probes; | |
109 | struct context *ctx; | |
110 | ||
111 | ctx = in->internal; | |
112 | ||
113 | if ((fd = open(filename, O_RDONLY)) == -1) | |
114 | return SR_ERR; | |
115 | ||
116 | num_probes = g_slist_length(in->sdi->probes); | |
117 | ||
118 | /* Send header packet to the session bus. */ | |
119 | std_session_send_df_header(in->sdi, LOG_PREFIX); | |
120 | ||
121 | if (ctx->samplerate) { | |
122 | packet.type = SR_DF_META; | |
123 | packet.payload = &meta; | |
124 | src = sr_config_new(SR_CONF_SAMPLERATE, | |
125 | g_variant_new_uint64(ctx->samplerate)); | |
126 | meta.config = g_slist_append(NULL, src); | |
127 | sr_session_send(in->sdi, &packet); | |
128 | sr_config_free(src); | |
129 | } | |
130 | ||
131 | /* Chop up the input file into chunks & send it to the session bus. */ | |
132 | packet.type = SR_DF_LOGIC; | |
133 | packet.payload = &logic; | |
134 | logic.unitsize = (num_probes + 7) / 8; | |
135 | logic.data = buffer; | |
136 | while ((size = read(fd, buffer, CHUNKSIZE)) > 0) { | |
137 | logic.length = size; | |
138 | sr_session_send(in->sdi, &packet); | |
139 | } | |
140 | close(fd); | |
141 | ||
142 | /* Send end packet to the session bus. */ | |
143 | packet.type = SR_DF_END; | |
144 | sr_session_send(in->sdi, &packet); | |
145 | ||
146 | g_free(ctx); | |
147 | in->internal = NULL; | |
148 | ||
149 | return SR_OK; | |
150 | } | |
151 | ||
152 | SR_PRIV struct sr_input_format input_binary = { | |
153 | .id = "binary", | |
154 | .description = "Raw binary", | |
155 | .format_match = format_match, | |
156 | .init = init, | |
157 | .loadfile = loadfile, | |
158 | }; |