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1 | /* |
2 | * This file is part of the libsigrok project. | |
3 | * | |
4 | * Copyright (C) 2020 Gerhard Sittig <gerhard.sittig@gmx.net> | |
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 <libsigrok/libsigrok.h> | |
21 | #include "libsigrok-internal.h" | |
22 | #include <string.h> | |
23 | ||
24 | struct feed_queue_logic { | |
25 | struct sr_dev_inst *sdi; | |
26 | size_t unit_size; | |
27 | size_t alloc_count; | |
28 | size_t fill_count; | |
29 | uint8_t *data_bytes; | |
30 | struct sr_datafeed_packet packet; | |
31 | struct sr_datafeed_logic logic; | |
32 | }; | |
33 | ||
34 | SR_API struct feed_queue_logic *feed_queue_logic_alloc(struct sr_dev_inst *sdi, | |
35 | size_t sample_count, size_t unit_size) | |
36 | { | |
37 | struct feed_queue_logic *q; | |
38 | ||
39 | q = g_malloc0(sizeof(*q)); | |
40 | q->sdi = sdi; | |
41 | q->unit_size = unit_size; | |
42 | q->alloc_count = sample_count; | |
43 | q->data_bytes = g_try_malloc(q->alloc_count * q->unit_size); | |
44 | if (!q->data_bytes) { | |
45 | g_free(q); | |
46 | return NULL; | |
47 | } | |
48 | ||
49 | memset(&q->packet, 0, sizeof(q->packet)); | |
50 | memset(&q->logic, 0, sizeof(q->logic)); | |
51 | q->packet.type = SR_DF_LOGIC; | |
52 | q->packet.payload = &q->logic; | |
53 | q->logic.unitsize = q->unit_size; | |
54 | q->logic.data = q->data_bytes; | |
55 | ||
56 | return q; | |
57 | } | |
58 | ||
59 | SR_API int feed_queue_logic_submit(struct feed_queue_logic *q, | |
60 | const uint8_t *data, size_t count) | |
61 | { | |
62 | uint8_t *wrptr; | |
63 | int ret; | |
64 | ||
65 | wrptr = &q->data_bytes[q->fill_count * q->unit_size]; | |
66 | while (count--) { | |
67 | memcpy(wrptr, data, q->unit_size); | |
68 | wrptr += q->unit_size; | |
69 | q->fill_count++; | |
70 | if (q->fill_count == q->alloc_count) { | |
71 | ret = feed_queue_logic_flush(q); | |
72 | if (ret != SR_OK) | |
73 | return ret; | |
74 | wrptr = &q->data_bytes[0]; | |
75 | } | |
76 | } | |
77 | ||
78 | return SR_OK; | |
79 | } | |
80 | ||
81 | SR_API int feed_queue_logic_flush(struct feed_queue_logic *q) | |
82 | { | |
83 | int ret; | |
84 | ||
85 | if (!q->fill_count) | |
86 | return SR_OK; | |
87 | ||
88 | q->logic.length = q->fill_count * q->unit_size; | |
89 | ret = sr_session_send(q->sdi, &q->packet); | |
90 | if (ret != SR_OK) | |
91 | return ret; | |
92 | q->fill_count = 0; | |
93 | ||
94 | return SR_OK; | |
95 | } | |
96 | ||
97 | SR_API void feed_queue_logic_free(struct feed_queue_logic *q) | |
98 | { | |
99 | ||
100 | if (!q) | |
101 | return; | |
102 | ||
103 | g_free(q->data_bytes); | |
104 | g_free(q); | |
105 | } | |
106 | ||
107 | struct feed_queue_analog { | |
108 | struct sr_dev_inst *sdi; | |
109 | size_t alloc_count; | |
110 | size_t fill_count; | |
111 | float *data_values; | |
112 | int digits; | |
113 | struct sr_datafeed_packet packet; | |
114 | struct sr_datafeed_analog analog; | |
115 | struct sr_analog_encoding encoding; | |
116 | struct sr_analog_meaning meaning; | |
117 | struct sr_analog_spec spec; | |
118 | GSList *channels; | |
119 | }; | |
120 | ||
121 | SR_API struct feed_queue_analog *feed_queue_analog_alloc(struct sr_dev_inst *sdi, | |
122 | size_t sample_count, int digits, struct sr_channel *ch) | |
123 | { | |
124 | struct feed_queue_analog *q; | |
125 | ||
126 | q = g_malloc0(sizeof(*q)); | |
127 | q->sdi = sdi; | |
128 | q->alloc_count = sample_count; | |
129 | q->data_values = g_try_malloc(q->alloc_count * sizeof(float)); | |
130 | if (!q->data_values) { | |
131 | g_free(q); | |
132 | return NULL; | |
133 | } | |
134 | q->digits = digits; | |
135 | q->channels = g_slist_append(NULL, ch); | |
136 | ||
137 | memset(&q->packet, 0, sizeof(q->packet)); | |
138 | sr_analog_init(&q->analog, &q->encoding, &q->meaning, &q->spec, digits); | |
139 | q->packet.type = SR_DF_ANALOG; | |
140 | q->packet.payload = &q->analog; | |
141 | q->encoding.is_signed = TRUE; | |
142 | q->meaning.channels = q->channels; | |
143 | q->analog.data = q->data_values; | |
144 | ||
145 | return q; | |
146 | } | |
147 | ||
148 | SR_API int feed_queue_analog_submit(struct feed_queue_analog *q, | |
149 | float data, size_t count) | |
150 | { | |
151 | int ret; | |
152 | ||
153 | while (count--) { | |
154 | q->data_values[q->fill_count++] = data; | |
155 | if (q->fill_count == q->alloc_count) { | |
156 | ret = feed_queue_analog_flush(q); | |
157 | if (ret != SR_OK) | |
158 | return ret; | |
159 | } | |
160 | } | |
161 | ||
162 | return SR_OK; | |
163 | } | |
164 | ||
165 | SR_API int feed_queue_analog_flush(struct feed_queue_analog *q) | |
166 | { | |
167 | int ret; | |
168 | ||
169 | if (!q->fill_count) | |
170 | return SR_OK; | |
171 | ||
172 | q->analog.num_samples = q->fill_count; | |
173 | ret = sr_session_send(q->sdi, &q->packet); | |
174 | if (ret != SR_OK) | |
175 | return ret; | |
176 | q->fill_count = 0; | |
177 | ||
178 | return SR_OK; | |
179 | } | |
180 | ||
181 | SR_API void feed_queue_analog_free(struct feed_queue_analog *q) | |
182 | { | |
183 | ||
184 | if (!q) | |
185 | return; | |
186 | ||
187 | g_free(q->data_values); | |
188 | g_slist_free(q->channels); | |
189 | g_free(q); | |
190 | } |