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1 | /* | |
2 | * This file is part of the sigrok-cli 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 <sys/types.h> | |
22 | #include <sys/stat.h> | |
23 | #include <fcntl.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
28 | #include <glib.h> | |
29 | #include "sigrok-cli.h" | |
30 | ||
31 | #define CHUNK_SIZE (4 * 1024 * 1024) | |
32 | ||
33 | static void load_input_file_module(void) | |
34 | { | |
35 | struct sr_session *session; | |
36 | const struct sr_input *in; | |
37 | const struct sr_input_module *imod; | |
38 | const struct sr_option **options; | |
39 | struct sr_dev_inst *sdi; | |
40 | GHashTable *mod_args, *mod_opts; | |
41 | GString *buf; | |
42 | gboolean got_sdi; | |
43 | int fd; | |
44 | ssize_t len; | |
45 | char *mod_id; | |
46 | gboolean is_stdin; | |
47 | ||
48 | if (!sr_input_list()) | |
49 | g_critical("No supported input formats available."); | |
50 | ||
51 | mod_id = NULL; | |
52 | mod_args = NULL; | |
53 | if (opt_input_format) { | |
54 | mod_args = parse_generic_arg(opt_input_format, TRUE); | |
55 | mod_id = g_hash_table_lookup(mod_args, "sigrok_key"); | |
56 | } | |
57 | ||
58 | is_stdin = strcmp(opt_input_file, "-") == 0; | |
59 | fd = 0; | |
60 | buf = g_string_sized_new(CHUNK_SIZE); | |
61 | if (mod_id) { | |
62 | /* User specified an input module to use. */ | |
63 | if (!(imod = sr_input_find(mod_id))) | |
64 | g_critical("Error: unknown input module '%s'.", mod_id); | |
65 | g_hash_table_remove(mod_args, "sigrok_key"); | |
66 | if ((options = sr_input_options_get(imod))) { | |
67 | mod_opts = generic_arg_to_opt(options, mod_args); | |
68 | sr_output_options_free(options); | |
69 | } else | |
70 | mod_opts = NULL; | |
71 | if (!(in = sr_input_new(imod, mod_opts))) | |
72 | g_critical("Error: failed to initialize input module."); | |
73 | if (mod_opts) | |
74 | g_hash_table_destroy(mod_opts); | |
75 | if (mod_args) | |
76 | g_hash_table_destroy(mod_args); | |
77 | if (!is_stdin && (fd = open(opt_input_file, O_RDONLY)) < 0) | |
78 | g_critical("Failed to load %s: %s.", opt_input_file, | |
79 | g_strerror(errno)); | |
80 | } else { | |
81 | if (!is_stdin) { | |
82 | /* | |
83 | * An actual filename: let the input modules try to | |
84 | * identify the file. | |
85 | */ | |
86 | if (sr_input_scan_file(opt_input_file, &in) == SR_OK) { | |
87 | /* That worked, reopen the file for reading. */ | |
88 | fd = open(opt_input_file, O_RDONLY); | |
89 | } | |
90 | } else { | |
91 | /* | |
92 | * Taking input from a pipe: let the input modules try | |
93 | * to identify the stream content. | |
94 | */ | |
95 | if (is_stdin) { | |
96 | /* stdin */ | |
97 | fd = 0; | |
98 | } else { | |
99 | fd = open(opt_input_file, O_RDONLY); | |
100 | if (fd == -1) | |
101 | g_critical("Failed to load %s: %s.", opt_input_file, | |
102 | g_strerror(errno)); | |
103 | } | |
104 | if ((len = read(fd, buf->str, CHUNK_SIZE)) < 1) | |
105 | g_critical("Failed to read %s: %s.", opt_input_file, | |
106 | g_strerror(errno)); | |
107 | buf->len = len; | |
108 | sr_input_scan_buffer(buf, &in); | |
109 | } | |
110 | if (!in) | |
111 | g_critical("Error: no input module found for this file."); | |
112 | } | |
113 | sr_session_new(sr_ctx, &session); | |
114 | sr_session_datafeed_callback_add(session, &datafeed_in, session); | |
115 | ||
116 | got_sdi = FALSE; | |
117 | while (TRUE) { | |
118 | g_string_truncate(buf, 0); | |
119 | len = read(fd, buf->str, CHUNK_SIZE); | |
120 | if (len < 0) | |
121 | g_critical("Read failed: %s", g_strerror(errno)); | |
122 | if (len == 0) | |
123 | /* End of file or stream. */ | |
124 | break; | |
125 | buf->len = len; | |
126 | if (sr_input_send(in, buf) != SR_OK) | |
127 | break; | |
128 | ||
129 | sdi = sr_input_dev_inst_get(in); | |
130 | if (!got_sdi && sdi) { | |
131 | /* First time we got a valid sdi. */ | |
132 | if (select_channels(sdi) != SR_OK) | |
133 | return; | |
134 | if (sr_session_dev_add(session, sdi) != SR_OK) { | |
135 | g_critical("Failed to use device."); | |
136 | sr_session_destroy(session); | |
137 | return; | |
138 | } | |
139 | got_sdi = TRUE; | |
140 | } | |
141 | } | |
142 | sr_input_end(in); | |
143 | sr_input_free(in); | |
144 | g_string_free(buf, TRUE); | |
145 | ||
146 | sr_session_destroy(session); | |
147 | ||
148 | } | |
149 | ||
150 | void load_input_file(void) | |
151 | { | |
152 | struct sr_session *session; | |
153 | struct sr_dev_inst *sdi; | |
154 | GSList *devices; | |
155 | GMainLoop *main_loop; | |
156 | int ret; | |
157 | ||
158 | if (!strcmp(opt_input_file, "-")) { | |
159 | /* Input from stdin is never a session file. */ | |
160 | load_input_file_module(); | |
161 | } else { | |
162 | if ((ret = sr_session_load(sr_ctx, opt_input_file, | |
163 | &session)) == SR_OK) { | |
164 | /* sigrok session file */ | |
165 | ret = sr_session_dev_list(session, &devices); | |
166 | if (ret != SR_OK || !devices || !devices->data) { | |
167 | g_critical("Failed to access session device."); | |
168 | g_slist_free(devices); | |
169 | sr_session_destroy(session); | |
170 | return; | |
171 | } | |
172 | sdi = devices->data; | |
173 | g_slist_free(devices); | |
174 | if (select_channels(sdi) != SR_OK) { | |
175 | sr_session_destroy(session); | |
176 | return; | |
177 | } | |
178 | main_loop = g_main_loop_new(NULL, FALSE); | |
179 | ||
180 | sr_session_datafeed_callback_add(session, datafeed_in, session); | |
181 | sr_session_stopped_callback_set(session, | |
182 | (sr_session_stopped_callback)g_main_loop_quit, | |
183 | main_loop); | |
184 | if (sr_session_start(session) == SR_OK) | |
185 | g_main_loop_run(main_loop); | |
186 | ||
187 | g_main_loop_unref(main_loop); | |
188 | sr_session_destroy(session); | |
189 | } else if (ret != SR_ERR) { | |
190 | /* It's a session file, but it didn't work out somehow. */ | |
191 | g_critical("Failed to load session file."); | |
192 | } else { | |
193 | /* Fall back on input modules. */ | |
194 | load_input_file_module(); | |
195 | } | |
196 | } | |
197 | } |