FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/dialoguenhance_template.c
Date: 2024-11-20 23:03:26
Exec Total Coverage
Lines: 0 134 0.0%
Functions: 0 16 0.0%
Branches: 0 24 0.0%

Line Branch Exec Source
1 /*
2 * This file is part of FFmpeg.
3 *
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 #include "libavutil/mem.h"
20 #include "libavutil/tx.h"
21 #include "avfilter.h"
22 #include "audio.h"
23
24 #undef ctype
25 #undef ftype
26 #undef SQRT
27 #undef HYPOT
28 #undef SAMPLE_FORMAT
29 #undef TX_TYPE
30 #undef ONE
31 #undef ZERO
32 #undef HALF
33 #undef SIN
34 #undef CLIP
35 #undef EPSILON
36 #if DEPTH == 32
37 #define SAMPLE_FORMAT float
38 #define SQRT sqrtf
39 #define HYPOT hypotf
40 #define ctype AVComplexFloat
41 #define ftype float
42 #define TX_TYPE AV_TX_FLOAT_RDFT
43 #define ONE 1.f
44 #define ZERO 0.f
45 #define HALF 0.5f
46 #define SIN sinf
47 #define CLIP av_clipf
48 #define EPSILON FLT_EPSILON
49 #else
50 #define SAMPLE_FORMAT double
51 #define SQRT sqrt
52 #define HYPOT hypot
53 #define ctype AVComplexDouble
54 #define ftype double
55 #define TX_TYPE AV_TX_DOUBLE_RDFT
56 #define ONE 1.0
57 #define ZERO 0.0
58 #define HALF 0.5
59 #define SIN sin
60 #define CLIP av_clipd
61 #define EPSILON DBL_EPSILON
62 #endif
63
64 #define fn3(a,b) a##_##b
65 #define fn2(a,b) fn3(a,b)
66 #define fn(a) fn2(a, SAMPLE_FORMAT)
67
68 static int fn(de_tx_init)(AVFilterContext *ctx)
69 {
70 AudioDialogueEnhanceContext *s = ctx->priv;
71 ftype scale = ONE, iscale = ONE / (s->fft_size * 1.5f);
72 int ret;
73
74 s->window = av_calloc(s->fft_size, sizeof(ftype));
75 if (!s->window)
76 return AVERROR(ENOMEM);
77 fn(s->window) = s->window;
78 for (int n = 0; n < s->fft_size; n++)
79 fn(s->window)[n] = SIN(M_PI*n/(s->fft_size-1));
80
81 ret = av_tx_init(&s->tx_ctx[0], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
82 if (ret < 0)
83 return ret;
84
85 ret = av_tx_init(&s->tx_ctx[1], &s->tx_fn, TX_TYPE, 0, s->fft_size, &scale, 0);
86 if (ret < 0)
87 return ret;
88
89 ret = av_tx_init(&s->itx_ctx, &s->itx_fn, TX_TYPE, 1, s->fft_size, &iscale, 0);
90 if (ret < 0)
91 return ret;
92
93 return 0;
94 }
95
96 static void fn(apply_window)(AudioDialogueEnhanceContext *s,
97 const ftype *in_frame, ftype *out_frame, const int add_to_out_frame)
98 {
99 const ftype *window = fn(s->window);
100 const int fft_size = s->fft_size;
101
102 if (add_to_out_frame) {
103 for (int i = 0; i < fft_size; i++)
104 out_frame[i] += in_frame[i] * window[i];
105 } else {
106 for (int i = 0; i < fft_size; i++)
107 out_frame[i] = in_frame[i] * window[i];
108 }
109 }
110
111 static ftype fn(sqr)(ftype x)
112 {
113 return x * x;
114 }
115
116 static void fn(get_centere)(ctype *left, ctype *right,
117 ctype *center, int N)
118 {
119 for (int i = 0; i < N; i++) {
120 const ftype l_re = left[i].re;
121 const ftype l_im = left[i].im;
122 const ftype r_re = right[i].re;
123 const ftype r_im = right[i].im;
124 const ftype a = HALF * (ONE - SQRT((fn(sqr)(l_re - r_re) + fn(sqr)(l_im - r_im))/
125 (fn(sqr)(l_re + r_re) + fn(sqr)(l_im + r_im) + EPSILON)));
126
127 center[i].re = a * (l_re + r_re);
128 center[i].im = a * (l_im + r_im);
129 }
130 }
131
132 static ftype fn(flux)(ftype *curf, ftype *prevf, int N)
133 {
134 ctype *cur = (ctype *)curf;
135 ctype *prev = (ctype *)prevf;
136 ftype sum = ZERO;
137
138 for (int i = 0; i < N; i++) {
139 ftype c_re = cur[i].re;
140 ftype c_im = cur[i].im;
141 ftype p_re = prev[i].re;
142 ftype p_im = prev[i].im;
143
144 sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
145 }
146
147 return sum;
148 }
149
150 static ftype fn(fluxlr)(ftype *lf, ftype *lpf,
151 ftype *rf, ftype *rpf,
152 int N)
153 {
154 ctype *l = (ctype *)lf;
155 ctype *lp = (ctype *)lpf;
156 ctype *r = (ctype *)rf;
157 ctype *rp = (ctype *)rpf;
158 ftype sum = ZERO;
159
160 for (int i = 0; i < N; i++) {
161 ftype c_re = l[i].re - r[i].re;
162 ftype c_im = l[i].im - r[i].im;
163 ftype p_re = lp[i].re - rp[i].re;
164 ftype p_im = lp[i].im - rp[i].im;
165
166 sum += fn(sqr)(HYPOT(c_re, c_im) - HYPOT(p_re, p_im));
167 }
168
169 return sum;
170 }
171
172 static ftype fn(calc_vad)(ftype fc, ftype flr, ftype a)
173 {
174 const ftype vad = a * (fc / (fc + flr) - HALF);
175
176 return CLIP(vad, ZERO, ONE);
177 }
178
179 static void fn(get_final)(ftype *c, ftype *l,
180 ftype *r, ftype vad, int N,
181 ftype original, ftype enhance)
182 {
183 ctype *center = (ctype *)c;
184 ctype *left = (ctype *)l;
185 ctype *right = (ctype *)r;
186
187 for (int i = 0; i < N; i++) {
188 ftype cP = fn(sqr)(center[i].re) + fn(sqr)(center[i].im);
189 ftype lrP = fn(sqr)(left[i].re - right[i].re) + fn(sqr)(left[i].im - right[i].im);
190 ftype G = cP / (cP + lrP + EPSILON);
191 ftype re, im;
192
193 re = center[i].re * (original + vad * G * enhance);
194 im = center[i].im * (original + vad * G * enhance);
195
196 center[i].re = re;
197 center[i].im = im;
198 }
199 }
200
201 static int fn(de_stereo)(AVFilterContext *ctx, AVFrame *out)
202 {
203 AudioDialogueEnhanceContext *s = ctx->priv;
204 ftype *center = (ftype *)s->center_frame->extended_data[0];
205 ftype *center_prev = (ftype *)s->center_frame->extended_data[1];
206 ftype *left_in = (ftype *)s->in_frame->extended_data[0];
207 ftype *right_in = (ftype *)s->in_frame->extended_data[1];
208 ftype *left_out = (ftype *)s->out_dist_frame->extended_data[0];
209 ftype *right_out = (ftype *)s->out_dist_frame->extended_data[1];
210 ftype *left_samples = (ftype *)s->in->extended_data[0];
211 ftype *right_samples = (ftype *)s->in->extended_data[1];
212 ftype *windowed_left = (ftype *)s->windowed_frame->extended_data[0];
213 ftype *windowed_right = (ftype *)s->windowed_frame->extended_data[1];
214 ftype *windowed_oleft = (ftype *)s->windowed_out->extended_data[0];
215 ftype *windowed_oright = (ftype *)s->windowed_out->extended_data[1];
216 ftype *windowed_pleft = (ftype *)s->windowed_prev->extended_data[0];
217 ftype *windowed_pright = (ftype *)s->windowed_prev->extended_data[1];
218 ftype *left_osamples = (ftype *)out->extended_data[0];
219 ftype *right_osamples = (ftype *)out->extended_data[1];
220 ftype *center_osamples = (ftype *)out->extended_data[2];
221 const int overlap = s->overlap;
222 const int offset = s->fft_size - overlap;
223 const int nb_samples = FFMIN(overlap, s->in->nb_samples);
224 ftype vad;
225
226 // shift in/out buffers
227 memmove(left_in, &left_in[overlap], offset * sizeof(ftype));
228 memmove(right_in, &right_in[overlap], offset * sizeof(ftype));
229 memmove(left_out, &left_out[overlap], offset * sizeof(ftype));
230 memmove(right_out, &right_out[overlap], offset * sizeof(ftype));
231
232 memcpy(&left_in[offset], left_samples, nb_samples * sizeof(ftype));
233 memcpy(&right_in[offset], right_samples, nb_samples * sizeof(ftype));
234 memset(&left_out[offset], 0, overlap * sizeof(ftype));
235 memset(&right_out[offset], 0, overlap * sizeof(ftype));
236
237 fn(apply_window)(s, left_in, windowed_left, 0);
238 fn(apply_window)(s, right_in, windowed_right, 0);
239
240 s->tx_fn(s->tx_ctx[0], windowed_oleft, windowed_left, sizeof(ftype));
241 s->tx_fn(s->tx_ctx[1], windowed_oright, windowed_right, sizeof(ftype));
242
243 fn(get_centere)((ctype *)windowed_oleft,
244 (ctype *)windowed_oright,
245 (ctype *)center,
246 s->fft_size / 2 + 1);
247
248 vad = fn(calc_vad)(fn(flux)(center, center_prev, s->fft_size / 2 + 1),
249 fn(fluxlr)(windowed_oleft, windowed_pleft,
250 windowed_oright, windowed_pright, s->fft_size / 2 + 1), s->voice);
251 vad = vad * 0.1 + 0.9 * fn(s->prev_vad);
252 fn(s->prev_vad) = vad;
253
254 memcpy(center_prev, center, s->fft_size * sizeof(ftype));
255 memcpy(windowed_pleft, windowed_oleft, s->fft_size * sizeof(ftype));
256 memcpy(windowed_pright, windowed_oright, s->fft_size * sizeof(ftype));
257
258 fn(get_final)(center, windowed_oleft, windowed_oright, vad, s->fft_size / 2 + 1,
259 s->original, s->enhance);
260
261 s->itx_fn(s->itx_ctx, windowed_oleft, center, sizeof(ctype));
262
263 fn(apply_window)(s, windowed_oleft, left_out, 1);
264
265 memcpy(left_osamples, left_in, overlap * sizeof(ftype));
266 memcpy(right_osamples, right_in, overlap * sizeof(ftype));
267
268 if (ctx->is_disabled)
269 memset(center_osamples, 0, overlap * sizeof(ftype));
270 else
271 memcpy(center_osamples, left_out, overlap * sizeof(ftype));
272
273 return 0;
274 }
275