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
|
/*
* Copyright (c) 2019-2025 Allwinner Technology Co., Ltd. ALL rights reserved.
*
* Allwinner is a trademark of Allwinner Technology Co.,Ltd., registered in
* the the people's Republic of China and other countries.
* All Allwinner Technology Co.,Ltd. trademarks are used with permission.
*
* DISCLAIMER
* THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT.
* IF YOU NEED TO INTEGRATE THIRD PARTY’S TECHNOLOGY (SONY, DTS, DOLBY, AVS OR MPEGLA, ETC.)
* IN ALLWINNERS’SDK OR PRODUCTS, YOU SHALL BE SOLELY RESPONSIBLE TO OBTAIN
* ALL APPROPRIATELY REQUIRED THIRD PARTY LICENCES.
* ALLWINNER SHALL HAVE NO WARRANTY, INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS
* COVERED UNDER ANY REQUIRED THIRD PARTY LICENSE.
* YOU ARE SOLELY RESPONSIBLE FOR YOUR USAGE OF THIRD PARTY’S TECHNOLOGY.
*
*
* THIS SOFTWARE IS PROVIDED BY ALLWINNER"AS IS" AND TO THE MAXIMUM EXTENT
* PERMITTED BY LAW, ALLWINNER EXPRESSLY DISCLAIMS ALL WARRANTIES OF ANY KIND,
* WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION REGARDING
* THE TITLE, NON-INFRINGEMENT, ACCURACY, CONDITION, COMPLETENESS, PERFORMANCE
* OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
* IN NO EVENT SHALL ALLWINNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __AW_ALSA_LIB_PCM_RATE_H
#define __AW_ALSA_LIB_PCM_RATE_H
#include <aw-alsa-lib/pcm.h>
#include <sys/types.h>
#define SND_PCM_RATE_PLUGIN_VERSION 0x010002
#define SND_PCM_RATE_PLUGIN_ENTRY(name) _snd_pcm_rate_##name##_open
#define SND_PCM_RATE_PLUGIN_CONF_ENTRY(name) _snd_pcm_rate_##name##_open_conf
#define SND_PCM_PLUGIN_RATE_MIN 4000
#define SND_PCM_PLUGIN_RATE_MAX 192000
typedef struct _snd_pcm_rate snd_pcm_rate_t;
/** hw_params information for a single side */
typedef struct snd_pcm_rate_side_info {
snd_pcm_format_t format;
unsigned int rate;
snd_pcm_uframes_t buffer_size;
snd_pcm_uframes_t period_size;
} snd_pcm_rate_side_info_t;
/** hw_params information */
typedef struct snd_pcm_rate_info {
struct snd_pcm_rate_side_info in;
struct snd_pcm_rate_side_info out;
unsigned int channels;
} snd_pcm_rate_info_t;
/** Callback table of rate-converter */
typedef struct snd_pcm_rate_ops {
/**
* close the converter; optional
*/
void (*close)(void *obj);
/**
* initialize the converter, called at hw_params
*/
int (*init)(void *obj, snd_pcm_rate_info_t *info);
/**
* free the converter; optional
*/
void (*free)(void *obj);
/**
* reset the converter, called at prepare; optional
*/
void (*reset)(void *obj);
/**
* adjust the pitch, called at sw_params; optional
*/
int (*adjust_pitch)(void *obj, snd_pcm_rate_info_t *info);
/**
* convert the data
*/
void (*convert)(void *obj,
const snd_pcm_channel_area_t *dst_areas,
snd_pcm_uframes_t dst_offset, unsigned int dst_frames,
const snd_pcm_channel_area_t *src_areas,
snd_pcm_uframes_t src_offset, unsigned int src_frames);
/**
* convert an s16 interleaved-data array; exclusive with convert
*/
void (*convert_s16)(void *obj, int16_t *dst, unsigned int dst_frames,
const int16_t *src, unsigned int src_frames);
void (*convert_s16_fix)(void *obj, int16_t *dst, unsigned int *dst_frames,
const int16_t *src, unsigned int *src_frames);
/**
* compute the frame size for input
*/
snd_pcm_uframes_t (*input_frames)(void *obj, snd_pcm_uframes_t frames);
/**
* compute the frame size for output
*/
snd_pcm_uframes_t (*output_frames)(void *obj, snd_pcm_uframes_t frames);
/**
* the protocol version the plugin supports;
* new field since version 0x010002
*/
unsigned int version;
/**
* return the supported min / max sample rates;
* new ops since version 0x010002
*/
int (*get_supported_rates)(void *obj, unsigned int *rate_min,
unsigned int *rate_max);
/**
* show some status messages for verbose mode;
* new ops since version 0x010002
*/
void (*dump)(void *obj);
} snd_pcm_rate_ops_t;
/** open function type */
typedef int (*snd_pcm_rate_open_func_t)(unsigned int version, void **objp,
snd_pcm_rate_ops_t *opsp);
typedef struct {
const char *pcm;
snd_pcm_format_t format;
unsigned int rate;
} snd_pcm_rate_slave_config_t;
typedef struct {
const char *type;
snd_pcm_rate_slave_config_t slave;
const char *converter;
} snd_pcm_rate_config_t;
#endif /* __AW_ALSA_LIB_PCM_RATE_H */
|
