blob: 57541470a0d3f8069d008d2df94fb04d09ab8e16 (
plain)
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
|
/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.io/license.html
*/
#include "gfx.h"
#if GFX_USE_GAUDIO && GAUDIO_NEED_PLAY
/* Include the driver defines */
#include "../../../src/gaudio/gaudio_driver_play.h"
/* Forward definition */
static void gaudio_play_pwm_timer_callbackI(void);
/* Include the board interface */
#include "gaudio_play_board.h"
static GDataBuffer *pplay;
static ArrayDataFormat playfmt;
static size_t playlen;
static uint8_t *pdata;
static void gaudio_play_pwm_timer_callbackI(void) {
if (pplay) {
// Get the next value from the current data buffer
if (gfxSampleFormatBits(playfmt) > 8) {
gaudio_play_pwm_setI(*(uint16_t *)pdata);
pdata += 2;
} else {
gaudio_play_pwm_setI(*pdata);
pdata++;
}
// Are we done yet
if (--playlen)
return;
gaudioPlayReleaseDataBlockI(pplay);
// Get a new data buffer
if (!(pplay = gaudioPlayGetDataBlockI())) {
// All is done
gaudioPlayDoneI();
return;
}
} else {
// Get a new data buffer
if (!(pplay = gaudioPlayGetDataBlockI()))
return;
}
// Set up ready for the new buffer
playlen = pplay->len;
if (gfxSampleFormatBits(playfmt) > 8)
playlen >>= 1;
pdata = (uint8_t *)(pplay+1);
}
/*===========================================================================*/
/* External declarations. */
/*===========================================================================*/
gBool gaudio_play_lld_init(uint16_t channel, uint32_t frequency, ArrayDataFormat format) {
(void) channel;
if (format != ARRAY_DATA_8BITUNSIGNED && format != ARRAY_DATA_10BITUNSIGNED)
return gFalse;
playfmt = format;
return gaudio_play_pwm_setup(frequency, format);
}
gBool gaudio_play_lld_set_volume(uint8_t vol) {
(void) vol;
return gFalse;
}
void gaudio_play_lld_start(void) {
gfxSystemLock();
// Get a new data buffer
if (pplay || !(pplay = gaudioPlayGetDataBlockI())) {
gfxSystemUnlock(); // Nothing to do
return;
}
// Set up ready for the new buffer
playlen = pplay->len;
if (gfxSampleFormatBits(playfmt) > 8)
playlen >>= 1;
pdata = (uint8_t *)(pplay+1);
gfxSystemUnlock();
// Start the playing
gaudio_play_pwm_start();
}
void gaudio_play_lld_stop(void) {
// Stop everything
gaudio_play_pwm_stop();
// We may need to clean up the remaining buffer.
gfxSystemLock();
if (pplay) {
gaudioPlayReleaseDataBlockI(pplay);
pplay = 0;
gaudioPlayDoneI();
}
gfxSystemUnlock();
}
#endif /* GFX_USE_GAUDIO && GAUDIO_NEED_PLAY */
|