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gerrit.devboardsforandroid.linaro.org / device / linaro / hikey960 / 0d7b3633f0ca0907937a9b25d317b2f573212d40 / . / hifi / xaf / hifi-dpf / include / xf-timebase.h
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Niranjan Yadla19336af2018-04-19 12:19:27 -0700[diff] [blame]1/*******************************************************************************
2* Copyright (C) 2018 Cadence Design Systems, Inc.
3*
4* Permission is hereby granted, free of charge, to any person obtaining
5* a copy of this software and associated documentation files (the
6* "Software"), to use this Software with Cadence processor cores only and
7* not with any other processors and platforms, subject to
8* the following conditions:
9*
10* The above copyright notice and this permission notice shall be included
11* in all copies or substantial portions of the Software.
12*
13* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
14* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
15* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
16* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
17* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
18* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
19* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21******************************************************************************/
22
23/*******************************************************************************
24 * xf-timebase.h
25 *
26 * Common timebase for deadline-driven scheduler
27 *
28 *******************************************************************************/
29
30#ifndef __XF_H
31#error "xf-timebase.h mustn't be included directly"
32#endif
33
34/*******************************************************************************
35 * Timebase for deadline-driven scheduler
36 ******************************************************************************/
37#ifdef XAF_ENABLE_NON_HIKEY
38/* ...set internal scheduler frequency as a LCM of all supported sample rates;
39 * it is in general not a problem to have large number here, however it should
40 * be noted that maximal-size audio-buffer that we handle, when expressed in
41 * ticks of this virtual frequency, must not exceed 2**31 (for otherwise
42 * scheduler timestamp comparison function will misbehave).
43 */
44#define XF_TIMEBASE_FREQ (4 * 3 * 56448000U)
45/* ...add paranoic check considering maximal audio-buffer duration as 0.1 sec */
46C_BUG((u32)(XF_TIMEBASE_FREQ / 10) >= (1 << 31));
47#else
48/* ...set internal scheduler frequency as a LCM of all supported sample rates */
49#define XF_TIMEBASE_FREQ 56448000U
50#endif
51/* ...supported sampling rates */
52C_BUG(XF_TIMEBASE_FREQ % 4000);
53C_BUG(XF_TIMEBASE_FREQ % 8000);
54C_BUG(XF_TIMEBASE_FREQ % 11025);
55C_BUG(XF_TIMEBASE_FREQ % 12000);
56C_BUG(XF_TIMEBASE_FREQ % 16000);
57C_BUG(XF_TIMEBASE_FREQ % 22050);
58C_BUG(XF_TIMEBASE_FREQ % 24000);
59C_BUG(XF_TIMEBASE_FREQ % 32000);
60C_BUG(XF_TIMEBASE_FREQ % 44100);
61C_BUG(XF_TIMEBASE_FREQ % 48000);
62C_BUG(XF_TIMEBASE_FREQ % 64000);
63C_BUG(XF_TIMEBASE_FREQ % 88200);
64C_BUG(XF_TIMEBASE_FREQ % 96000);
65C_BUG(XF_TIMEBASE_FREQ % 128000);
66C_BUG(XF_TIMEBASE_FREQ % 176400);
67C_BUG(XF_TIMEBASE_FREQ % 192000);
68
69/* ...calculate upsampling factor for given sample rate */
70static inline u32 xf_timebase_factor(u32 sample_rate)
71{
72 /* ...probably we can tolerate single division */
73 switch(sample_rate)
74 {
75 case 4000:
76 return XF_TIMEBASE_FREQ / 4000;
77 case 8000:
78 return XF_TIMEBASE_FREQ / 8000;
79 case 11025:
80 return XF_TIMEBASE_FREQ / 11025;
81 case 12000:
82 return XF_TIMEBASE_FREQ / 11025;
83 case 16000:
84 return XF_TIMEBASE_FREQ / 16000;
85 case 22050:
86 return XF_TIMEBASE_FREQ / 22050;
87 case 24000:
88 return XF_TIMEBASE_FREQ / 24000;
89 case 32000:
90 return XF_TIMEBASE_FREQ / 32000;
91 case 44100:
92 return XF_TIMEBASE_FREQ / 44100;
93 case 48000:
94 return XF_TIMEBASE_FREQ / 48000;
95 case 64000:
96 return XF_TIMEBASE_FREQ / 64000;
97 case 88200:
98 return XF_TIMEBASE_FREQ / 88200;
99 case 96000:
100 return XF_TIMEBASE_FREQ / 96000;
101 case 128000:
102 return XF_TIMEBASE_FREQ / 128000;
103 case 176400:
104 return XF_TIMEBASE_FREQ / 176400;
105 case 192000:
106 return XF_TIMEBASE_FREQ / 192000;
107 default:
108 return 0;
109 }
110}
111
112/* ...core timebase */
113static inline u32 xf_core_timebase(u32 core)
114{
115 xf_core_data_t *cd = XF_CORE_DATA(core);
116
117 /* ...get local scheduler timebase */
118 return xf_sched_timestamp(&cd->sched);
119}
120
121/* ...compare timestamps */
122static inline int xf_time_after(u32 a, u32 b)
123{
124 return ((s32)(a - b) > 0);
125}
126
127/* ...compare timstamps */
128static inline int xf_time_before(u32 a, u32 b)
129{
130 return ((s32)(a - b) < 0);
131}
132