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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
/*
* Copyright (c) 2016 The FFmpeg Project
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "audio.h"
typedef struct CrystalizerContext {
const AVClass *class;
float mult;
int clip;
AVFrame *prev;
int (*filter[2][2])(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
} CrystalizerContext;
#define OFFSET(x) offsetof(CrystalizerContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
static const AVOption crystalizer_options[] = {
{ "i", "set intensity", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.0},-10, 10, A },
{ "c", "enable clipping", OFFSET(clip), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A },
{ NULL }
};
AVFILTER_DEFINE_CLASS(crystalizer);
typedef struct ThreadData {
void **d;
void **p;
const void **s;
int nb_samples;
int channels;
float mult;
} ThreadData;
#define filters(fmt, type, inverse, clp, inverset, clip, one, clip_fn, packed) \
static int filter_## inverse ##_## fmt ##_## clp(AVFilterContext *ctx, \
void *arg, int jobnr,\
int nb_jobs) \
{ \
ThreadData *td = arg; \
void **d = td->d; \
void **p = td->p; \
const void **s = td->s; \
const int nb_samples = td->nb_samples; \
const int channels = td->channels; \
const type mult = td->mult; \
const type scale = one / (-mult + one); \
const int start = (channels * jobnr) / nb_jobs; \
const int end = (channels * (jobnr+1)) / nb_jobs; \
\
if (packed) { \
type *prv = p[0]; \
for (int c = start; c < end; c++) { \
const type *src = s[0]; \
type *dst = d[0]; \
\
for (int n = 0; n < nb_samples; n++) { \
type current = src[c]; \
\
if (inverset) { \
dst[c] = (current - prv[c] * mult) * scale; \
prv[c] = dst[c]; \
} else { \
dst[c] = current + (current - prv[c]) * mult; \
prv[c] = current; \
} \
if (clip) { \
dst[c] = clip_fn(dst[c], -one, one); \
} \
\
dst += channels; \
src += channels; \
} \
} \
} else { \
for (int c = start; c < end; c++) { \
const type *src = s[c]; \
type *dst = d[c]; \
type *prv = p[c]; \
\
for (int n = 0; n < nb_samples; n++) { \
type current = src[n]; \
\
if (inverset) { \
dst[n] = (current - prv[0] * mult) * scale; \
prv[0] = dst[n]; \
} else { \
dst[n] = current + (current - prv[0]) * mult; \
prv[0] = current; \
} \
if (clip) { \
dst[n] = clip_fn(dst[n], -one, one); \
} \
} \
} \
} \
\
return 0; \
}
filters(flt, float, inverse, noclip, 1, 0, 1.f, av_clipf, 1)
filters(flt, float, inverse, clip, 1, 1, 1.f, av_clipf, 1)
filters(flt, float, noinverse, noclip, 0, 0, 1.f, av_clipf, 1)
filters(flt, float, noinverse, clip, 0, 1, 1.f, av_clipf, 1)
filters(fltp, float, inverse, noclip, 1, 0, 1.f, av_clipf, 0)
filters(fltp, float, inverse, clip, 1, 1, 1.f, av_clipf, 0)
filters(fltp, float, noinverse, noclip, 0, 0, 1.f, av_clipf, 0)
filters(fltp, float, noinverse, clip, 0, 1, 1.f, av_clipf, 0)
filters(dbl, double, inverse, noclip, 1, 0, 1.0, av_clipd, 1)
filters(dbl, double, inverse, clip, 1, 1, 1.0, av_clipd, 1)
filters(dbl, double, noinverse, noclip, 0, 0, 1.0, av_clipd, 1)
filters(dbl, double, noinverse, clip, 0, 1, 1.0, av_clipd, 1)
filters(dblp, double, inverse, noclip, 1, 0, 1.0, av_clipd, 0)
filters(dblp, double, inverse, clip, 1, 1, 1.0, av_clipd, 0)
filters(dblp, double, noinverse, noclip, 0, 0, 1.0, av_clipd, 0)
filters(dblp, double, noinverse, clip, 0, 1, 1.0, av_clipd, 0)
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
CrystalizerContext *s = ctx->priv;
switch (inlink->format) {
case AV_SAMPLE_FMT_FLT:
s->filter[0][0] = filter_inverse_flt_noclip;
s->filter[1][0] = filter_noinverse_flt_noclip;
s->filter[0][1] = filter_inverse_flt_clip;
s->filter[1][1] = filter_noinverse_flt_clip;
break;
case AV_SAMPLE_FMT_FLTP:
s->filter[0][0] = filter_inverse_fltp_noclip;
s->filter[1][0] = filter_noinverse_fltp_noclip;
s->filter[0][1] = filter_inverse_fltp_clip;
s->filter[1][1] = filter_noinverse_fltp_clip;
break;
case AV_SAMPLE_FMT_DBL:
s->filter[0][0] = filter_inverse_dbl_noclip;
s->filter[1][0] = filter_noinverse_dbl_noclip;
s->filter[0][1] = filter_inverse_dbl_clip;
s->filter[1][1] = filter_noinverse_dbl_clip;
break;
case AV_SAMPLE_FMT_DBLP:
s->filter[0][0] = filter_inverse_dblp_noclip;
s->filter[1][0] = filter_noinverse_dblp_noclip;
s->filter[0][1] = filter_inverse_dblp_clip;
s->filter[1][1] = filter_noinverse_dblp_clip;
break;
default:
return AVERROR_BUG;
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
CrystalizerContext *s = ctx->priv;
AVFrame *out;
ThreadData td;
if (!s->prev) {
s->prev = ff_get_audio_buffer(inlink, 1);
if (!s->prev) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
}
if (av_frame_is_writable(in)) {
out = in;
} else {
out = ff_get_audio_buffer(outlink, in->nb_samples);
if (!out) {
av_frame_free(&in);
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
}
td.d = (void **)out->extended_data;
td.s = (const void **)in->extended_data;
td.p = (void **)s->prev->extended_data;
td.nb_samples = in->nb_samples;
td.channels = in->ch_layout.nb_channels;
td.mult = ctx->is_disabled ? 0.f : s->mult;
ff_filter_execute(ctx, s->filter[td.mult >= 0.f][s->clip], &td, NULL,
FFMIN(inlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx)));
if (out != in)
av_frame_free(&in);
return ff_filter_frame(outlink, out);
}
static av_cold void uninit(AVFilterContext *ctx)
{
CrystalizerContext *s = ctx->priv;
av_frame_free(&s->prev);
}
static const AVFilterPad inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
const AVFilter ff_af_crystalizer = {
.name = "crystalizer",
.description = NULL_IF_CONFIG_SMALL("Simple audio noise sharpening filter."),
.priv_size = sizeof(CrystalizerContext),
.priv_class = &crystalizer_class,
.uninit = uninit,
FILTER_INPUTS(inputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP),
.process_command = ff_filter_process_command,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |
AVFILTER_FLAG_SLICE_THREADS,
};
|
