1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr & Nick Robinson
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/* Lingo 0x02, Simple Remote Lingo
*
* TODO:
* - Fix cmd 0x00 handling, there has to be a more elegant way of doing
* this
*/
#include "iap-core.h"
#include "iap-lingo.h"
#include "system.h"
#include "button.h"
#include "audio.h"
#include "settings.h"
/*
* This macro is meant to be used inside an IAP mode message handler.
* It is passed the expected minimum length of the message buffer.
* If the buffer does not have the required lenght an ACK
* packet with a Bad Parameter error is generated.
*/
#define CHECKLEN(x) do { \
if (len < (x)) { \
cmd_ack(cmd, IAP_ACK_BAD_PARAM); \
return; \
}} while(0)
static void cmd_ack(const unsigned char cmd, const unsigned char status)
{
IAP_TX_INIT(0x02, 0x01);
IAP_TX_PUT(status);
IAP_TX_PUT(cmd);
iap_send_tx();
}
#define cmd_ok(cmd) cmd_ack((cmd), IAP_ACK_OK)
void iap_handlepkt_mode2(const unsigned int len, const unsigned char *buf)
{
unsigned int cmd = buf[1];
/* We expect at least three bytes in the buffer, one for the
* lingo, one for the command, and one for the first button
* state bits.
*/
CHECKLEN(3);
/* Lingo 0x02 must have been negotiated */
if (!DEVICE_LINGO_SUPPORTED(0x02)) {
cmd_ack(cmd, IAP_ACK_BAD_PARAM);
return;
}
switch (cmd)
{
/* ContextButtonStatus (0x00)
*
* Transmit button events from the device to the iPod
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Simple Remote Lingo, always 0x02
* 0x01: Command, always 0x00
* 0x02: Button states 0:7
* 0x03: Button states 8:15 (optional)
* 0x04: Button states 16:23 (optional)
* 0x05: Button states 24:31 (optional)
*
* Returns: (none)
*/
case 0x00:
{
iap_remotebtn = BUTTON_NONE;
iap_timeoutbtn = 0;
if(buf[2] != 0)
{
if(buf[2] & 1)
REMOTE_BUTTON(BUTTON_RC_PLAY);
if(buf[2] & 2)
REMOTE_BUTTON(BUTTON_RC_VOL_UP);
if(buf[2] & 4)
REMOTE_BUTTON(BUTTON_RC_VOL_DOWN);
if(buf[2] & 8)
REMOTE_BUTTON(BUTTON_RC_RIGHT);
if(buf[2] & 16)
REMOTE_BUTTON(BUTTON_RC_LEFT);
}
else if(len >= 4 && buf[3] != 0)
{
if(buf[3] & 1) /* play */
{
if (audio_status() != AUDIO_STATUS_PLAY)
REMOTE_BUTTON(BUTTON_RC_PLAY);
}
if(buf[3] & 2) /* pause */
{
if (audio_status() == AUDIO_STATUS_PLAY)
REMOTE_BUTTON(BUTTON_RC_PLAY);
}
if(buf[3] & 128) /* Shuffle */
{
if (!iap_btnshuffle)
{
iap_shuffle_state(!global_settings.playlist_shuffle);
iap_btnshuffle = true;
}
}
}
else if(len >= 5 && buf[4] != 0)
{
if(buf[4] & 1) /* repeat */
{
if (!iap_btnrepeat)
{
iap_repeat_next();
iap_btnrepeat = true;
}
}
/* Power off
* Not quite sure how to react to this, but stopping playback
* is a good start.
*/
if (buf[4] & 0x04)
{
if (audio_status() == AUDIO_STATUS_PLAY)
REMOTE_BUTTON(BUTTON_RC_PLAY);
}
if(buf[4] & 16) /* ffwd */
REMOTE_BUTTON(BUTTON_RC_RIGHT);
if(buf[4] & 32) /* frwd */
REMOTE_BUTTON(BUTTON_RC_LEFT);
}
break;
}
/* ACK (0x01)
*
* Sent from the iPod to the device
*/
/* ImageButtonStatus (0x02)
*
* Transmit image button events from the device to the iPod
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Simple Remote Lingo, always 0x02
* 0x01: Command, always 0x02
* 0x02: Button states 0:7
* 0x03: Button states 8:15 (optional)
* 0x04: Button states 16:23 (optional)
* 0x05: Button states 24:31 (optional)
*
* This command requires authentication
*
* Returns on success:
* IAP_ACK_OK
*
* Returns on failure:
* IAP_ACK_*
*/
case 0x02:
{
if (!DEVICE_AUTHENTICATED) {
cmd_ack(cmd, IAP_ACK_NO_AUTHEN);
break;
}
cmd_ack(cmd, IAP_ACK_CMD_FAILED);
break;
}
/* VideoButtonStatus (0x03)
*
* Transmit video button events from the device to the iPod
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Simple Remote Lingo, always 0x02
* 0x01: Command, always 0x03
* 0x02: Button states 0:7
* 0x03: Button states 8:15 (optional)
* 0x04: Button states 16:23 (optional)
* 0x05: Button states 24:31 (optional)
*
* This command requires authentication
*
* Returns on success:
* IAP_ACK_OK
*
* Returns on failure:
* IAP_ACK_*
*/
case 0x03:
{
if (!DEVICE_AUTHENTICATED) {
cmd_ack(cmd, IAP_ACK_NO_AUTHEN);
break;
}
cmd_ack(cmd, IAP_ACK_CMD_FAILED);
break;
}
/* AudioButtonStatus (0x04)
*
* Transmit audio button events from the device to the iPod
*
* Packet format (offset in buf[]: Description)
* 0x00: Lingo ID: Simple Remote Lingo, always 0x02
* 0x01: Command, always 0x04
* 0x02: Button states 0:7
* 0x03: Button states 8:15 (optional)
* 0x04: Button states 16:23 (optional)
* 0x05: Button states 24:31 (optional)
*
* This command requires authentication
*
* Returns on success:
* IAP_ACK_OK
*
* Returns on failure:
* IAP_ACK_*
*/
case 0x04:
{
unsigned char repeatbuf[6];
if (!DEVICE_AUTHENTICATED) {
cmd_ack(cmd, IAP_ACK_NO_AUTHEN);
break;
}
/* This is basically the same command as ContextButtonStatus (0x00),
* with the difference that it requires authentication and that
* it returns an ACK packet to the device.
* So just route it through the handler again, with 0x00 as the
* command
*/
memcpy(repeatbuf, buf, 6);
repeatbuf[1] = 0x00;
iap_handlepkt_mode2((len<6)?len:6, repeatbuf);
cmd_ok(cmd);
break;
}
/* The default response is IAP_ACK_BAD_PARAM */
default:
{
#ifdef LOGF_ENABLE
logf("iap: Unsupported Mode02 Command");
#else
cmd_ack(cmd, IAP_ACK_BAD_PARAM);
#endif
break;
}
}
}
|