diff options
Diffstat (limited to 'apps/plugins/mpegplayer/mpeg_misc.c')
-rw-r--r-- | apps/plugins/mpegplayer/mpeg_misc.c | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/apps/plugins/mpegplayer/mpeg_misc.c b/apps/plugins/mpegplayer/mpeg_misc.c new file mode 100644 index 0000000000..31f0644212 --- /dev/null +++ b/apps/plugins/mpegplayer/mpeg_misc.c | |||
@@ -0,0 +1,227 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Miscellaneous helper API definitions | ||
11 | * | ||
12 | * Copyright (c) 2007 Michael Sevakis | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | #include "plugin.h" | ||
24 | #include "mpegplayer.h" | ||
25 | |||
26 | /** Streams **/ | ||
27 | |||
28 | /* Initializes the cursor */ | ||
29 | void stream_scan_init(struct stream_scan *sk) | ||
30 | { | ||
31 | dbuf_l2_init(&sk->l2); | ||
32 | } | ||
33 | |||
34 | /* Ensures direction is -1 or 1 and margin is properly initialized */ | ||
35 | void stream_scan_normalize(struct stream_scan *sk) | ||
36 | { | ||
37 | if (sk->dir >= 0) | ||
38 | { | ||
39 | sk->dir = SSCAN_FORWARD; | ||
40 | sk->margin = sk->len; | ||
41 | } | ||
42 | else if (sk->dir < 0) | ||
43 | { | ||
44 | sk->dir = SSCAN_REVERSE; | ||
45 | sk->margin = 0; | ||
46 | } | ||
47 | } | ||
48 | |||
49 | /* Moves a scan cursor. If amount is positive, the increment is in the scan | ||
50 | * direction, otherwise opposite the scan direction */ | ||
51 | void stream_scan_offset(struct stream_scan *sk, off_t by) | ||
52 | { | ||
53 | off_t bydir = by*sk->dir; | ||
54 | sk->pos += bydir; | ||
55 | sk->margin -= bydir; | ||
56 | sk->len -= by; | ||
57 | } | ||
58 | |||
59 | /** Time helpers **/ | ||
60 | void ts_to_hms(uint32_t pts, struct hms *hms) | ||
61 | { | ||
62 | hms->frac = pts % TS_SECOND; | ||
63 | hms->sec = pts / TS_SECOND; | ||
64 | hms->min = hms->sec / 60; | ||
65 | hms->hrs = hms->min / 60; | ||
66 | hms->sec %= 60; | ||
67 | hms->min %= 60; | ||
68 | } | ||
69 | |||
70 | void hms_format(char *buf, size_t bufsize, struct hms *hms) | ||
71 | { | ||
72 | /* Only display hours if nonzero */ | ||
73 | if (hms->hrs != 0) | ||
74 | { | ||
75 | rb->snprintf(buf, bufsize, "%u:%02u:%02u", | ||
76 | hms->hrs, hms->min, hms->sec); | ||
77 | } | ||
78 | else | ||
79 | { | ||
80 | rb->snprintf(buf, bufsize, "%u:%02u", | ||
81 | hms->min, hms->sec); | ||
82 | } | ||
83 | } | ||
84 | |||
85 | /** Maths **/ | ||
86 | uint32_t muldiv_uint32(uint32_t multiplicand, | ||
87 | uint32_t multiplier, | ||
88 | uint32_t divisor) | ||
89 | { | ||
90 | if (divisor != 0) | ||
91 | { | ||
92 | uint64_t prod = (uint64_t)multiplier*multiplicand + divisor/2; | ||
93 | |||
94 | if ((uint32_t)(prod >> 32) < divisor) | ||
95 | return (uint32_t)(prod / divisor); | ||
96 | } | ||
97 | else if (multiplicand == 0 || multiplier == 0) | ||
98 | { | ||
99 | return 0; /* 0/0 = 0 : yaya */ | ||
100 | } | ||
101 | /* else (> 0) / 0 = UINT32_MAX */ | ||
102 | |||
103 | return UINT32_MAX; /* Saturate */ | ||
104 | } | ||
105 | |||
106 | |||
107 | /** Lists **/ | ||
108 | |||
109 | /* Does the list have any members? */ | ||
110 | bool list_is_empty(void **list) | ||
111 | { | ||
112 | return *list == NULL; | ||
113 | } | ||
114 | |||
115 | /* Is the item inserted into a particular list? */ | ||
116 | bool list_is_member(void **list, void *item) | ||
117 | { | ||
118 | return *rb->find_array_ptr(list, item) != NULL; | ||
119 | } | ||
120 | |||
121 | /* Removes an item from a list - returns true if item was found | ||
122 | * and thus removed. */ | ||
123 | bool list_remove_item(void **list, void *item) | ||
124 | { | ||
125 | return rb->remove_array_ptr(list, item) != -1; | ||
126 | } | ||
127 | |||
128 | /* Adds a list item, insert last, if not already present. */ | ||
129 | void list_add_item(void **list, void *item) | ||
130 | { | ||
131 | void **item_p = rb->find_array_ptr(list, item); | ||
132 | if (*item_p == NULL) | ||
133 | *item_p = item; | ||
134 | } | ||
135 | |||
136 | /* Clears the entire list. */ | ||
137 | void list_clear_all(void **list) | ||
138 | { | ||
139 | while (*list != NULL) | ||
140 | *list++ = NULL; | ||
141 | } | ||
142 | |||
143 | /* Enumerate all items in the array, passing each item in turn to the | ||
144 | * callback as well as the data value. The current item may be safely | ||
145 | * removed. Other changes during enumeration are undefined. The callback | ||
146 | * may return 'false' to stop the enumeration early. */ | ||
147 | void list_enum_items(void **list, | ||
148 | list_enum_callback_t callback, | ||
149 | void* data) | ||
150 | { | ||
151 | for (;;) | ||
152 | { | ||
153 | void *item = *list; | ||
154 | |||
155 | if (item == NULL) | ||
156 | break; | ||
157 | |||
158 | if (callback != NULL && !callback(item, data)) | ||
159 | break; | ||
160 | |||
161 | if (*list == item) | ||
162 | list++; /* Item still there */ | ||
163 | } | ||
164 | } | ||
165 | |||
166 | |||
167 | /** System events **/ | ||
168 | static long mpeg_sysevent_id; | ||
169 | |||
170 | void mpeg_sysevent_clear(void) | ||
171 | { | ||
172 | mpeg_sysevent_id = 0; | ||
173 | } | ||
174 | |||
175 | void mpeg_sysevent_set(void) | ||
176 | { | ||
177 | /* Nonzero and won't invoke anything in default event handler */ | ||
178 | mpeg_sysevent_id = ACTION_STD_CANCEL; | ||
179 | } | ||
180 | |||
181 | long mpeg_sysevent(void) | ||
182 | { | ||
183 | return mpeg_sysevent_id; | ||
184 | } | ||
185 | |||
186 | int mpeg_sysevent_callback(int btn, | ||
187 | const struct menu_item_ex *menu, | ||
188 | struct gui_synclist *this_list) | ||
189 | { | ||
190 | (void) this_list; | ||
191 | switch (btn) | ||
192 | { | ||
193 | case SYS_USB_CONNECTED: | ||
194 | case SYS_POWEROFF: | ||
195 | case SYS_REBOOT: | ||
196 | mpeg_sysevent_id = btn; | ||
197 | return ACTION_STD_CANCEL; | ||
198 | } | ||
199 | |||
200 | return btn; | ||
201 | (void)menu; | ||
202 | } | ||
203 | |||
204 | void mpeg_sysevent_handle(void) | ||
205 | { | ||
206 | long id = mpeg_sysevent(); | ||
207 | if (id != 0) | ||
208 | rb->default_event_handler(id); | ||
209 | } | ||
210 | |||
211 | |||
212 | /** Buttons **/ | ||
213 | |||
214 | int mpeg_button_get(int timeout) | ||
215 | { | ||
216 | int button; | ||
217 | |||
218 | mpeg_sysevent_clear(); | ||
219 | button = timeout == TIMEOUT_BLOCK ? rb->button_get(true) : | ||
220 | rb->button_get_w_tmo(timeout); | ||
221 | |||
222 | /* Produce keyclick */ | ||
223 | rb->keyclick_click(true, button); | ||
224 | |||
225 | return mpeg_sysevent_callback(button, NULL, NULL); | ||
226 | } | ||
227 | |||