1 | //rdtcs.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009-2011 |
---|
5 | * |
---|
6 | * This file is part of roard a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * RoarAudio is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
22 | * Boston, MA 02110-1301, USA. |
---|
23 | * |
---|
24 | */ |
---|
25 | |
---|
26 | #include "roard.h" |
---|
27 | |
---|
28 | #ifndef ROAR_WITHOUT_DCOMP_RDTCS |
---|
29 | |
---|
30 | int rdtcs_init (void) { |
---|
31 | return 0; |
---|
32 | } |
---|
33 | |
---|
34 | int rdtcs_free (void) { |
---|
35 | return 0; |
---|
36 | } |
---|
37 | |
---|
38 | int rdtcs_init_config (void) { |
---|
39 | memset(&g_rdtcs, 0, sizeof(g_rdtcs)); |
---|
40 | |
---|
41 | strncpy(g_rdtcs.rds.ps, RDTCS_RDS_PS_DEFAULT, RDTCS_RDS_PS_LEN); |
---|
42 | g_rdtcs.rds.ps[RDTCS_RDS_PS_LEN] = 0; |
---|
43 | |
---|
44 | g_rdtcs.rds.pty = RDTCS_RDS_PTY_DEFAULT; |
---|
45 | g_rdtcs.rds.pi = RDTCS_RDS_PI_DEFAULT; |
---|
46 | g_rdtcs.rds.flags = RDTCS_RDS_FLAG_NONE; |
---|
47 | |
---|
48 | return 0; |
---|
49 | } |
---|
50 | |
---|
51 | int rdtcs_rds_set_ps (char * ps) { |
---|
52 | int i; |
---|
53 | |
---|
54 | if ( ps == NULL ) |
---|
55 | return -1; |
---|
56 | |
---|
57 | if ( strlen(ps) > 8 ) |
---|
58 | return -1; |
---|
59 | |
---|
60 | // coppy string converting to upper case: |
---|
61 | for (i = 0; ps[i]; i++) { |
---|
62 | g_rdtcs.rds.ps[i] = toupper(ps[i]); |
---|
63 | } |
---|
64 | |
---|
65 | g_rdtcs.rds.ps[i] = 0; // terminating \0 |
---|
66 | |
---|
67 | return 0; |
---|
68 | } |
---|
69 | |
---|
70 | int rdtcs_rds_set_pty (char * pty) { |
---|
71 | if ( pty == NULL ) |
---|
72 | return -1; |
---|
73 | |
---|
74 | return -1; |
---|
75 | } |
---|
76 | |
---|
77 | int rdtcs_rds_set_flag (unsigned int flag, int reset) { |
---|
78 | |
---|
79 | g_rdtcs.rds.flags |= flag; |
---|
80 | |
---|
81 | if ( reset ) |
---|
82 | g_rdtcs.rds.flags -= flag; |
---|
83 | |
---|
84 | return 0; |
---|
85 | } |
---|
86 | |
---|
87 | |
---|
88 | int rdtcs_check_stream (int id) { |
---|
89 | return -1; |
---|
90 | } |
---|
91 | |
---|
92 | int rdtcs_send_stream (int id) { |
---|
93 | struct roar_stream * s; |
---|
94 | struct roar_stream_server * ss; |
---|
95 | |
---|
96 | if ( g_streams[id] == NULL ) |
---|
97 | return -1; |
---|
98 | |
---|
99 | ROAR_DBG("rdtcs_send_stream(id=%i) = ?", id); |
---|
100 | |
---|
101 | s = ROAR_STREAM(ss = g_streams[id]); |
---|
102 | |
---|
103 | switch (s->info.codec) { |
---|
104 | case ROAR_CODEC_RDS: |
---|
105 | return rdtcs_send_stream_rds(id, ss); |
---|
106 | break; |
---|
107 | default: |
---|
108 | streams_delete(id); |
---|
109 | return -1; |
---|
110 | } |
---|
111 | |
---|
112 | return 0; |
---|
113 | } |
---|
114 | |
---|
115 | int rdtcs_send_stream_rds (int id, struct roar_stream_server * ss) { |
---|
116 | struct roar_stream * s; |
---|
117 | |
---|
118 | s = ROAR_STREAM(ss); |
---|
119 | |
---|
120 | |
---|
121 | return rdtcs_send_stream_rds_group(id, ss); |
---|
122 | } |
---|
123 | |
---|
124 | int rdtcs_send_stream_rds_group (int id, struct roar_stream_server * ss) { |
---|
125 | char out[RDTCS_RDS_GROUP_LEN]; |
---|
126 | char * c; |
---|
127 | int block[4] = {RDTCS_RDS_BLOCK_A, RDTCS_RDS_BLOCK_B, RDTCS_RDS_BLOCK_C0, RDTCS_RDS_BLOCK_D}; |
---|
128 | uint16_t data[4]; |
---|
129 | uint16_t crc; |
---|
130 | register uint32_t s; |
---|
131 | int i, fill; |
---|
132 | |
---|
133 | // TODO: think about byte order! |
---|
134 | |
---|
135 | for (i = 0; i < 4; i++) data[i] = 0; |
---|
136 | |
---|
137 | data[0] = g_rdtcs.rds.pi; |
---|
138 | |
---|
139 | memset(out, 0, sizeof(out)); |
---|
140 | |
---|
141 | c = out; |
---|
142 | s = 0; |
---|
143 | fill = 0; |
---|
144 | for (i = 0; i < 4; i++) { |
---|
145 | // data is 16 bit long |
---|
146 | s |= data[i] << (fill & 0xFFFF); |
---|
147 | fill += 16; |
---|
148 | |
---|
149 | crc = rdtcs_rds_crc_calc(data[i], block[i]); |
---|
150 | |
---|
151 | // CRC is 10 bit long |
---|
152 | s |= crc << (fill & 0x03FF); |
---|
153 | fill += 10; |
---|
154 | |
---|
155 | // shift all complet bytes we allready have out |
---|
156 | while (fill >= 8) { |
---|
157 | *c = s & 0xFF; |
---|
158 | c++; |
---|
159 | s >>= 8; |
---|
160 | fill -= 8; |
---|
161 | } |
---|
162 | } |
---|
163 | |
---|
164 | return stream_vio_s_write(ss, out, RDTCS_RDS_GROUP_LEN) == RDTCS_RDS_GROUP_LEN ? 0 : -1; |
---|
165 | } |
---|
166 | |
---|
167 | uint16_t rdtcs_rds_crc_calc (uint16_t data, int block) { |
---|
168 | return 0xAAAA; |
---|
169 | } |
---|
170 | |
---|
171 | #endif |
---|
172 | |
---|
173 | //ll |
---|