| 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/avassert.h" | ||
| 20 | #include "libavutil/channel_layout.h" | ||
| 21 | #include "libavutil/opt.h" | ||
| 22 | #include "audio.h" | ||
| 23 | #include "avfilter.h" | ||
| 24 | #include "filters.h" | ||
| 25 | |||
| 26 | enum FilterType { | ||
| 27 | DC_TYPE, | ||
| 28 | AC_TYPE, | ||
| 29 | SQ_TYPE, | ||
| 30 | PS_TYPE, | ||
| 31 | NB_TYPES, | ||
| 32 | }; | ||
| 33 | |||
| 34 | typedef struct ADenormContext { | ||
| 35 | const AVClass *class; | ||
| 36 | |||
| 37 | double level; | ||
| 38 | double level_db; | ||
| 39 | int type; | ||
| 40 | int64_t in_samples; | ||
| 41 | |||
| 42 | void (*filter[NB_TYPES])(AVFilterContext *ctx, void *dst, | ||
| 43 | const void *src, int nb_samples); | ||
| 44 | } ADenormContext; | ||
| 45 | |||
| 46 | ✗ | static void dc_denorm_fltp(AVFilterContext *ctx, void *dstp, | |
| 47 | const void *srcp, int nb_samples) | ||
| 48 | { | ||
| 49 | ✗ | ADenormContext *s = ctx->priv; | |
| 50 | ✗ | const float *src = (const float *)srcp; | |
| 51 | ✗ | float *dst = (float *)dstp; | |
| 52 | ✗ | const float dc = s->level; | |
| 53 | |||
| 54 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 55 | ✗ | dst[n] = src[n] + dc; | |
| 56 | } | ||
| 57 | ✗ | } | |
| 58 | |||
| 59 | ✗ | static void dc_denorm_dblp(AVFilterContext *ctx, void *dstp, | |
| 60 | const void *srcp, int nb_samples) | ||
| 61 | { | ||
| 62 | ✗ | ADenormContext *s = ctx->priv; | |
| 63 | ✗ | const double *src = (const double *)srcp; | |
| 64 | ✗ | double *dst = (double *)dstp; | |
| 65 | ✗ | const double dc = s->level; | |
| 66 | |||
| 67 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 68 | ✗ | dst[n] = src[n] + dc; | |
| 69 | } | ||
| 70 | ✗ | } | |
| 71 | |||
| 72 | ✗ | static void ac_denorm_fltp(AVFilterContext *ctx, void *dstp, | |
| 73 | const void *srcp, int nb_samples) | ||
| 74 | { | ||
| 75 | ✗ | ADenormContext *s = ctx->priv; | |
| 76 | ✗ | const float *src = (const float *)srcp; | |
| 77 | ✗ | float *dst = (float *)dstp; | |
| 78 | ✗ | const float dc = s->level; | |
| 79 | ✗ | const int64_t N = s->in_samples; | |
| 80 | |||
| 81 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 82 | ✗ | dst[n] = src[n] + dc * (((N + n) & 1) ? -1.f : 1.f); | |
| 83 | } | ||
| 84 | ✗ | } | |
| 85 | |||
| 86 | ✗ | static void ac_denorm_dblp(AVFilterContext *ctx, void *dstp, | |
| 87 | const void *srcp, int nb_samples) | ||
| 88 | { | ||
| 89 | ✗ | ADenormContext *s = ctx->priv; | |
| 90 | ✗ | const double *src = (const double *)srcp; | |
| 91 | ✗ | double *dst = (double *)dstp; | |
| 92 | ✗ | const double dc = s->level; | |
| 93 | ✗ | const int64_t N = s->in_samples; | |
| 94 | |||
| 95 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 96 | ✗ | dst[n] = src[n] + dc * (((N + n) & 1) ? -1. : 1.); | |
| 97 | } | ||
| 98 | ✗ | } | |
| 99 | |||
| 100 | ✗ | static void sq_denorm_fltp(AVFilterContext *ctx, void *dstp, | |
| 101 | const void *srcp, int nb_samples) | ||
| 102 | { | ||
| 103 | ✗ | ADenormContext *s = ctx->priv; | |
| 104 | ✗ | const float *src = (const float *)srcp; | |
| 105 | ✗ | float *dst = (float *)dstp; | |
| 106 | ✗ | const float dc = s->level; | |
| 107 | ✗ | const int64_t N = s->in_samples; | |
| 108 | |||
| 109 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 110 | ✗ | dst[n] = src[n] + dc * ((((N + n) >> 8) & 1) ? -1.f : 1.f); | |
| 111 | } | ||
| 112 | ✗ | } | |
| 113 | |||
| 114 | ✗ | static void sq_denorm_dblp(AVFilterContext *ctx, void *dstp, | |
| 115 | const void *srcp, int nb_samples) | ||
| 116 | { | ||
| 117 | ✗ | ADenormContext *s = ctx->priv; | |
| 118 | ✗ | const double *src = (const double *)srcp; | |
| 119 | ✗ | double *dst = (double *)dstp; | |
| 120 | ✗ | const double dc = s->level; | |
| 121 | ✗ | const int64_t N = s->in_samples; | |
| 122 | |||
| 123 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 124 | ✗ | dst[n] = src[n] + dc * ((((N + n) >> 8) & 1) ? -1. : 1.); | |
| 125 | } | ||
| 126 | ✗ | } | |
| 127 | |||
| 128 | ✗ | static void ps_denorm_fltp(AVFilterContext *ctx, void *dstp, | |
| 129 | const void *srcp, int nb_samples) | ||
| 130 | { | ||
| 131 | ✗ | ADenormContext *s = ctx->priv; | |
| 132 | ✗ | const float *src = (const float *)srcp; | |
| 133 | ✗ | float *dst = (float *)dstp; | |
| 134 | ✗ | const float dc = s->level; | |
| 135 | ✗ | const int64_t N = s->in_samples; | |
| 136 | |||
| 137 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 138 | ✗ | dst[n] = src[n] + dc * (((N + n) & 255) ? 0.f : 1.f); | |
| 139 | } | ||
| 140 | ✗ | } | |
| 141 | |||
| 142 | ✗ | static void ps_denorm_dblp(AVFilterContext *ctx, void *dstp, | |
| 143 | const void *srcp, int nb_samples) | ||
| 144 | { | ||
| 145 | ✗ | ADenormContext *s = ctx->priv; | |
| 146 | ✗ | const double *src = (const double *)srcp; | |
| 147 | ✗ | double *dst = (double *)dstp; | |
| 148 | ✗ | const double dc = s->level; | |
| 149 | ✗ | const int64_t N = s->in_samples; | |
| 150 | |||
| 151 | ✗ | for (int n = 0; n < nb_samples; n++) { | |
| 152 | ✗ | dst[n] = src[n] + dc * (((N + n) & 255) ? 0. : 1.); | |
| 153 | } | ||
| 154 | ✗ | } | |
| 155 | |||
| 156 | ✗ | static int config_output(AVFilterLink *outlink) | |
| 157 | { | ||
| 158 | ✗ | AVFilterContext *ctx = outlink->src; | |
| 159 | ✗ | ADenormContext *s = ctx->priv; | |
| 160 | |||
| 161 | ✗ | switch (outlink->format) { | |
| 162 | ✗ | case AV_SAMPLE_FMT_FLTP: | |
| 163 | ✗ | s->filter[DC_TYPE] = dc_denorm_fltp; | |
| 164 | ✗ | s->filter[AC_TYPE] = ac_denorm_fltp; | |
| 165 | ✗ | s->filter[SQ_TYPE] = sq_denorm_fltp; | |
| 166 | ✗ | s->filter[PS_TYPE] = ps_denorm_fltp; | |
| 167 | ✗ | break; | |
| 168 | ✗ | case AV_SAMPLE_FMT_DBLP: | |
| 169 | ✗ | s->filter[DC_TYPE] = dc_denorm_dblp; | |
| 170 | ✗ | s->filter[AC_TYPE] = ac_denorm_dblp; | |
| 171 | ✗ | s->filter[SQ_TYPE] = sq_denorm_dblp; | |
| 172 | ✗ | s->filter[PS_TYPE] = ps_denorm_dblp; | |
| 173 | ✗ | break; | |
| 174 | ✗ | default: | |
| 175 | ✗ | av_assert0(0); | |
| 176 | } | ||
| 177 | |||
| 178 | ✗ | return 0; | |
| 179 | } | ||
| 180 | |||
| 181 | typedef struct ThreadData { | ||
| 182 | AVFrame *in, *out; | ||
| 183 | } ThreadData; | ||
| 184 | |||
| 185 | ✗ | static int filter_channels(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs) | |
| 186 | { | ||
| 187 | ✗ | ADenormContext *s = ctx->priv; | |
| 188 | ✗ | ThreadData *td = arg; | |
| 189 | ✗ | AVFrame *out = td->out; | |
| 190 | ✗ | AVFrame *in = td->in; | |
| 191 | ✗ | const int start = (in->ch_layout.nb_channels * jobnr) / nb_jobs; | |
| 192 | ✗ | const int end = (in->ch_layout.nb_channels * (jobnr+1)) / nb_jobs; | |
| 193 | |||
| 194 | ✗ | for (int ch = start; ch < end; ch++) { | |
| 195 | ✗ | s->filter[s->type](ctx, out->extended_data[ch], | |
| 196 | ✗ | in->extended_data[ch], | |
| 197 | in->nb_samples); | ||
| 198 | } | ||
| 199 | |||
| 200 | ✗ | return 0; | |
| 201 | } | ||
| 202 | |||
| 203 | ✗ | static int filter_frame(AVFilterLink *inlink, AVFrame *in) | |
| 204 | { | ||
| 205 | ✗ | AVFilterContext *ctx = inlink->dst; | |
| 206 | ✗ | ADenormContext *s = ctx->priv; | |
| 207 | ✗ | AVFilterLink *outlink = ctx->outputs[0]; | |
| 208 | ThreadData td; | ||
| 209 | AVFrame *out; | ||
| 210 | |||
| 211 | ✗ | if (av_frame_is_writable(in)) { | |
| 212 | ✗ | out = in; | |
| 213 | } else { | ||
| 214 | ✗ | out = ff_get_audio_buffer(outlink, in->nb_samples); | |
| 215 | ✗ | if (!out) { | |
| 216 | ✗ | av_frame_free(&in); | |
| 217 | ✗ | return AVERROR(ENOMEM); | |
| 218 | } | ||
| 219 | ✗ | av_frame_copy_props(out, in); | |
| 220 | } | ||
| 221 | |||
| 222 | ✗ | s->level = exp(s->level_db / 20. * M_LN10); | |
| 223 | ✗ | td.in = in; td.out = out; | |
| 224 | ✗ | ff_filter_execute(ctx, filter_channels, &td, NULL, | |
| 225 | ✗ | FFMIN(inlink->ch_layout.nb_channels, ff_filter_get_nb_threads(ctx))); | |
| 226 | |||
| 227 | ✗ | s->in_samples += in->nb_samples; | |
| 228 | |||
| 229 | ✗ | if (out != in) | |
| 230 | ✗ | av_frame_free(&in); | |
| 231 | ✗ | return ff_filter_frame(outlink, out); | |
| 232 | } | ||
| 233 | |||
| 234 | static const AVFilterPad adenorm_inputs[] = { | ||
| 235 | { | ||
| 236 | .name = "default", | ||
| 237 | .type = AVMEDIA_TYPE_AUDIO, | ||
| 238 | .filter_frame = filter_frame, | ||
| 239 | }, | ||
| 240 | }; | ||
| 241 | |||
| 242 | static const AVFilterPad adenorm_outputs[] = { | ||
| 243 | { | ||
| 244 | .name = "default", | ||
| 245 | .type = AVMEDIA_TYPE_AUDIO, | ||
| 246 | .config_props = config_output, | ||
| 247 | }, | ||
| 248 | }; | ||
| 249 | |||
| 250 | #define OFFSET(x) offsetof(ADenormContext, x) | ||
| 251 | #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM | ||
| 252 | |||
| 253 | static const AVOption adenorm_options[] = { | ||
| 254 | { "level", "set level", OFFSET(level_db), AV_OPT_TYPE_DOUBLE, {.dbl=-351}, -451, -90, FLAGS }, | ||
| 255 | { "type", "set type", OFFSET(type), AV_OPT_TYPE_INT, {.i64=DC_TYPE}, 0, NB_TYPES-1, FLAGS, .unit = "type" }, | ||
| 256 | { "dc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=DC_TYPE}, 0, 0, FLAGS, .unit = "type"}, | ||
| 257 | { "ac", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AC_TYPE}, 0, 0, FLAGS, .unit = "type"}, | ||
| 258 | { "square",NULL, 0, AV_OPT_TYPE_CONST, {.i64=SQ_TYPE}, 0, 0, FLAGS, .unit = "type"}, | ||
| 259 | { "pulse", NULL, 0, AV_OPT_TYPE_CONST, {.i64=PS_TYPE}, 0, 0, FLAGS, .unit = "type"}, | ||
| 260 | { NULL } | ||
| 261 | }; | ||
| 262 | |||
| 263 | AVFILTER_DEFINE_CLASS(adenorm); | ||
| 264 | |||
| 265 | const AVFilter ff_af_adenorm = { | ||
| 266 | .name = "adenorm", | ||
| 267 | .description = NULL_IF_CONFIG_SMALL("Remedy denormals by adding extremely low-level noise."), | ||
| 268 | .priv_size = sizeof(ADenormContext), | ||
| 269 | FILTER_INPUTS(adenorm_inputs), | ||
| 270 | FILTER_OUTPUTS(adenorm_outputs), | ||
| 271 | FILTER_SAMPLEFMTS(AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP), | ||
| 272 | .priv_class = &adenorm_class, | ||
| 273 | .process_command = ff_filter_process_command, | ||
| 274 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | | ||
| 275 | AVFILTER_FLAG_SLICE_THREADS, | ||
| 276 | }; | ||
| 277 |