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
|
/* Copyright (C) 2010-2020 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (audio_resampler.c).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <string.h>
#include <string/stdstring.h>
#include <features/features_cpu.h>
#include <file/config_file_userdata.h>
#include <audio/audio_resampler.h>
static void resampler_null_process(void *a, struct resampler_data *b) { }
static void resampler_null_free(void *a) { }
static void *resampler_null_init(const struct resampler_config *a, double b,
enum resampler_quality c, resampler_simd_mask_t d) { return (void*)0; }
retro_resampler_t null_resampler = {
resampler_null_init,
resampler_null_process,
resampler_null_free,
RESAMPLER_API_VERSION,
"null",
"null"
};
static const retro_resampler_t *resampler_drivers[] = {
&sinc_resampler,
#ifdef HAVE_CC_RESAMPLER
&CC_resampler,
#endif
#ifdef HAVE_NEAREST_RESAMPLER
&nearest_resampler,
#endif
&null_resampler,
NULL,
};
static const struct resampler_config resampler_config = {
config_userdata_get_float,
config_userdata_get_int,
config_userdata_get_float_array,
config_userdata_get_int_array,
config_userdata_get_string,
config_userdata_free,
};
/**
* find_resampler_driver_index:
* @ident : Identifier of resampler driver to find.
*
* Finds resampler driver index by @ident name.
*
* Returns: resampler driver index if resampler driver was found, otherwise
* -1.
**/
static int find_resampler_driver_index(const char *ident)
{
unsigned i;
for (i = 0; resampler_drivers[i]; i++)
if (string_is_equal_noncase(ident, resampler_drivers[i]->ident))
return i;
return -1;
}
/**
* find_resampler_driver:
* @ident : Identifier of resampler driver to find.
*
* Finds resampler by @ident name.
*
* Returns: resampler driver if resampler driver was found, otherwise
* NULL.
**/
static const retro_resampler_t *find_resampler_driver(const char *ident)
{
int i = find_resampler_driver_index(ident);
if (i >= 0)
return resampler_drivers[i];
return resampler_drivers[0];
}
/**
* resampler_append_plugs:
* @re : Resampler handle
* @backend : Resampler backend that is about to be set.
* @bw_ratio : Bandwidth ratio.
*
* Initializes resampler driver based on queried CPU features.
*
* Returns: true (1) if successfully initialized, otherwise false (0).
**/
static bool resampler_append_plugs(void **re,
const retro_resampler_t **backend,
enum resampler_quality quality,
double bw_ratio)
{
resampler_simd_mask_t mask = (resampler_simd_mask_t)cpu_features_get();
if (*backend)
*re = (*backend)->init(&resampler_config, bw_ratio, quality, mask);
if (!*re)
return false;
return true;
}
/**
* audio_resampler_driver_find_handle:
* @idx : index of driver to get handle to.
*
* Returns: handle to audio resampler driver at index. Can be NULL
* if nothing found.
**/
const void *audio_resampler_driver_find_handle(int idx)
{
const void *drv = resampler_drivers[idx];
if (!drv)
return NULL;
return drv;
}
/**
* audio_resampler_driver_find_ident:
* @idx : index of driver to get handle to.
*
* Returns: Human-readable identifier of audio resampler driver at index.
* Can be NULL if nothing found.
**/
const char *audio_resampler_driver_find_ident(int idx)
{
const retro_resampler_t *drv = resampler_drivers[idx];
if (!drv)
return NULL;
return drv->ident;
}
/**
* retro_resampler_realloc:
* @re : Resampler handle
* @backend : Resampler backend that is about to be set.
* @ident : Identifier name for resampler we want.
* @bw_ratio : Bandwidth ratio.
*
* Reallocates resampler. Will free previous handle before
* allocating a new one. If ident is NULL, first resampler will be used.
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool retro_resampler_realloc(void **re, const retro_resampler_t **backend,
const char *ident, enum resampler_quality quality, double bw_ratio)
{
if (*re && *backend)
(*backend)->free(*re);
*re = NULL;
*backend = find_resampler_driver(ident);
if (!resampler_append_plugs(re, backend, quality, bw_ratio))
{
if (!*re)
*backend = NULL;
return false;
}
return true;
}
|
