| 1 | /* |
| 2 | * Copyright (c) 2012 Clément Bœsch |
| 3 | * |
| 4 | * This file is part of FFmpeg. |
| 5 | * |
| 6 | * FFmpeg is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * FFmpeg is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along |
| 17 | * with FFmpeg; if not, write to the Free Software Foundation, Inc., |
| 18 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 19 | */ |
| 20 | |
| 21 | /** |
| 22 | * @file |
| 23 | * EBU R.128 implementation |
| 24 | * @see http://tech.ebu.ch/loudness |
| 25 | * @see https://www.youtube.com/watch?v=iuEtQqC-Sqo "EBU R128 Introduction - Florian Camerer" |
| 26 | * @todo implement start/stop/reset through filter command injection |
| 27 | * @todo support other frequencies to avoid resampling |
| 28 | */ |
| 29 | |
| 30 | #include <math.h> |
| 31 | |
| 32 | #include "libavutil/avassert.h" |
| 33 | #include "libavutil/avstring.h" |
| 34 | #include "libavutil/channel_layout.h" |
| 35 | #include "libavutil/dict.h" |
| 36 | #include "libavutil/xga_font_data.h" |
| 37 | #include "libavutil/opt.h" |
| 38 | #include "libavutil/timestamp.h" |
| 39 | #include "libswresample/swresample.h" |
| 40 | #include "audio.h" |
| 41 | #include "avfilter.h" |
| 42 | #include "formats.h" |
| 43 | #include "internal.h" |
| 44 | |
| 45 | #define MAX_CHANNELS 63 |
| 46 | |
| 47 | /* pre-filter coefficients */ |
| 48 | #define PRE_B0 1.53512485958697 |
| 49 | #define PRE_B1 -2.69169618940638 |
| 50 | #define PRE_B2 1.19839281085285 |
| 51 | #define PRE_A1 -1.69065929318241 |
| 52 | #define PRE_A2 0.73248077421585 |
| 53 | |
| 54 | /* RLB-filter coefficients */ |
| 55 | #define RLB_B0 1.0 |
| 56 | #define RLB_B1 -2.0 |
| 57 | #define RLB_B2 1.0 |
| 58 | #define RLB_A1 -1.99004745483398 |
| 59 | #define RLB_A2 0.99007225036621 |
| 60 | |
| 61 | #define ABS_THRES -70 ///< silence gate: we discard anything below this absolute (LUFS) threshold |
| 62 | #define ABS_UP_THRES 10 ///< upper loud limit to consider (ABS_THRES being the minimum) |
| 63 | #define HIST_GRAIN 100 ///< defines histogram precision |
| 64 | #define HIST_SIZE ((ABS_UP_THRES - ABS_THRES) * HIST_GRAIN + 1) |
| 65 | |
| 66 | /** |
| 67 | * A histogram is an array of HIST_SIZE hist_entry storing all the energies |
| 68 | * recorded (with an accuracy of 1/HIST_GRAIN) of the loudnesses from ABS_THRES |
| 69 | * (at 0) to ABS_UP_THRES (at HIST_SIZE-1). |
| 70 | * This fixed-size system avoids the need of a list of energies growing |
| 71 | * infinitely over the time and is thus more scalable. |
| 72 | */ |
| 73 | struct hist_entry { |
| 74 | int count; ///< how many times the corresponding value occurred |
| 75 | double energy; ///< E = 10^((L + 0.691) / 10) |
| 76 | double loudness; ///< L = -0.691 + 10 * log10(E) |
| 77 | }; |
| 78 | |
| 79 | struct integrator { |
| 80 | double *cache[MAX_CHANNELS]; ///< window of filtered samples (N ms) |
| 81 | int cache_pos; ///< focus on the last added bin in the cache array |
| 82 | double sum[MAX_CHANNELS]; ///< sum of the last N ms filtered samples (cache content) |
| 83 | int filled; ///< 1 if the cache is completely filled, 0 otherwise |
| 84 | double rel_threshold; ///< relative threshold |
| 85 | double sum_kept_powers; ///< sum of the powers (weighted sums) above absolute threshold |
| 86 | int nb_kept_powers; ///< number of sum above absolute threshold |
| 87 | struct hist_entry *histogram; ///< histogram of the powers, used to compute LRA and I |
| 88 | }; |
| 89 | |
| 90 | struct rect { int x, y, w, h; }; |
| 91 | |
| 92 | typedef struct { |
| 93 | const AVClass *class; ///< AVClass context for log and options purpose |
| 94 | |
| 95 | /* peak metering */ |
| 96 | int peak_mode; ///< enabled peak modes |
| 97 | double *true_peaks; ///< true peaks per channel |
| 98 | double *sample_peaks; ///< sample peaks per channel |
| 99 | double *true_peaks_per_frame; ///< true peaks in a frame per channel |
| 100 | #if CONFIG_SWRESAMPLE |
| 101 | SwrContext *swr_ctx; ///< over-sampling context for true peak metering |
| 102 | double *swr_buf; ///< resampled audio data for true peak metering |
| 103 | int swr_linesize; |
| 104 | #endif |
| 105 | |
| 106 | /* video */ |
| 107 | int do_video; ///< 1 if video output enabled, 0 otherwise |
| 108 | int w, h; ///< size of the video output |
| 109 | struct rect text; ///< rectangle for the LU legend on the left |
| 110 | struct rect graph; ///< rectangle for the main graph in the center |
| 111 | struct rect gauge; ///< rectangle for the gauge on the right |
| 112 | AVFrame *outpicref; ///< output picture reference, updated regularly |
| 113 | int meter; ///< select a EBU mode between +9 and +18 |
| 114 | int scale_range; ///< the range of LU values according to the meter |
| 115 | int y_zero_lu; ///< the y value (pixel position) for 0 LU |
| 116 | int *y_line_ref; ///< y reference values for drawing the LU lines in the graph and the gauge |
| 117 | |
| 118 | /* audio */ |
| 119 | int nb_channels; ///< number of channels in the input |
| 120 | double *ch_weighting; ///< channel weighting mapping |
| 121 | int sample_count; ///< sample count used for refresh frequency, reset at refresh |
| 122 | |
| 123 | /* Filter caches. |
| 124 | * The mult by 3 in the following is for X[i], X[i-1] and X[i-2] */ |
| 125 | double x[MAX_CHANNELS * 3]; ///< 3 input samples cache for each channel |
| 126 | double y[MAX_CHANNELS * 3]; ///< 3 pre-filter samples cache for each channel |
| 127 | double z[MAX_CHANNELS * 3]; ///< 3 RLB-filter samples cache for each channel |
| 128 | |
| 129 | #define I400_BINS (48000 * 4 / 10) |
| 130 | #define I3000_BINS (48000 * 3) |
| 131 | struct integrator i400; ///< 400ms integrator, used for Momentary loudness (M), and Integrated loudness (I) |
| 132 | struct integrator i3000; ///< 3s integrator, used for Short term loudness (S), and Loudness Range (LRA) |
| 133 | |
| 134 | /* I and LRA specific */ |
| 135 | double integrated_loudness; ///< integrated loudness in LUFS (I) |
| 136 | double loudness_range; ///< loudness range in LU (LRA) |
| 137 | double lra_low, lra_high; ///< low and high LRA values |
| 138 | |
| 139 | /* misc */ |
| 140 | int loglevel; ///< log level for frame logging |
| 141 | int metadata; ///< whether or not to inject loudness results in frames |
| 142 | } EBUR128Context; |
| 143 | |
| 144 | enum { |
| 145 | PEAK_MODE_NONE = 0, |
| 146 | PEAK_MODE_SAMPLES_PEAKS = 1<<1, |
| 147 | PEAK_MODE_TRUE_PEAKS = 1<<2, |
| 148 | }; |
| 149 | |
| 150 | #define OFFSET(x) offsetof(EBUR128Context, x) |
| 151 | #define A AV_OPT_FLAG_AUDIO_PARAM |
| 152 | #define V AV_OPT_FLAG_VIDEO_PARAM |
| 153 | #define F AV_OPT_FLAG_FILTERING_PARAM |
| 154 | static const AVOption ebur128_options[] = { |
| 155 | { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, V|F }, |
| 156 | { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, V|F }, |
| 157 | { "meter", "set scale meter (+9 to +18)", OFFSET(meter), AV_OPT_TYPE_INT, {.i64 = 9}, 9, 18, V|F }, |
| 158 | { "framelog", "force frame logging level", OFFSET(loglevel), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, A|V|F, "level" }, |
| 159 | { "info", "information logging level", 0, AV_OPT_TYPE_CONST, {.i64 = AV_LOG_INFO}, INT_MIN, INT_MAX, A|V|F, "level" }, |
| 160 | { "verbose", "verbose logging level", 0, AV_OPT_TYPE_CONST, {.i64 = AV_LOG_VERBOSE}, INT_MIN, INT_MAX, A|V|F, "level" }, |
| 161 | { "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, A|V|F }, |
| 162 | { "peak", "set peak mode", OFFSET(peak_mode), AV_OPT_TYPE_FLAGS, {.i64 = PEAK_MODE_NONE}, 0, INT_MAX, A|F, "mode" }, |
| 163 | { "none", "disable any peak mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_NONE}, INT_MIN, INT_MAX, A|F, "mode" }, |
| 164 | { "sample", "enable peak-sample mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_SAMPLES_PEAKS}, INT_MIN, INT_MAX, A|F, "mode" }, |
| 165 | { "true", "enable true-peak mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_TRUE_PEAKS}, INT_MIN, INT_MAX, A|F, "mode" }, |
| 166 | { NULL }, |
| 167 | }; |
| 168 | |
| 169 | AVFILTER_DEFINE_CLASS(ebur128); |
| 170 | |
| 171 | static const uint8_t graph_colors[] = { |
| 172 | 0xdd, 0x66, 0x66, // value above 0LU non reached |
| 173 | 0x66, 0x66, 0xdd, // value below 0LU non reached |
| 174 | 0x96, 0x33, 0x33, // value above 0LU reached |
| 175 | 0x33, 0x33, 0x96, // value below 0LU reached |
| 176 | 0xdd, 0x96, 0x96, // value above 0LU line non reached |
| 177 | 0x96, 0x96, 0xdd, // value below 0LU line non reached |
| 178 | 0xdd, 0x33, 0x33, // value above 0LU line reached |
| 179 | 0x33, 0x33, 0xdd, // value below 0LU line reached |
| 180 | }; |
| 181 | |
| 182 | static const uint8_t *get_graph_color(const EBUR128Context *ebur128, int v, int y) |
| 183 | { |
| 184 | const int below0 = y > ebur128->y_zero_lu; |
| 185 | const int reached = y >= v; |
| 186 | const int line = ebur128->y_line_ref[y] || y == ebur128->y_zero_lu; |
| 187 | const int colorid = 4*line + 2*reached + below0; |
| 188 | return graph_colors + 3*colorid; |
| 189 | } |
| 190 | |
| 191 | static inline int lu_to_y(const EBUR128Context *ebur128, double v) |
| 192 | { |
| 193 | v += 2 * ebur128->meter; // make it in range [0;...] |
| 194 | v = av_clipf(v, 0, ebur128->scale_range); // make sure it's in the graph scale |
| 195 | v = ebur128->scale_range - v; // invert value (y=0 is on top) |
| 196 | return v * ebur128->graph.h / ebur128->scale_range; // rescale from scale range to px height |
| 197 | } |
| 198 | |
| 199 | #define FONT8 0 |
| 200 | #define FONT16 1 |
| 201 | |
| 202 | static const uint8_t font_colors[] = { |
| 203 | 0xdd, 0xdd, 0x00, |
| 204 | 0x00, 0x96, 0x96, |
| 205 | }; |
| 206 | |
| 207 | static void drawtext(AVFrame *pic, int x, int y, int ftid, const uint8_t *color, const char *fmt, ...) |
| 208 | { |
| 209 | int i; |
| 210 | char buf[128] = {0}; |
| 211 | const uint8_t *font; |
| 212 | int font_height; |
| 213 | va_list vl; |
| 214 | |
| 215 | if (ftid == FONT16) font = avpriv_vga16_font, font_height = 16; |
| 216 | else if (ftid == FONT8) font = avpriv_cga_font, font_height = 8; |
| 217 | else return; |
| 218 | |
| 219 | va_start(vl, fmt); |
| 220 | vsnprintf(buf, sizeof(buf), fmt, vl); |
| 221 | va_end(vl); |
| 222 | |
| 223 | for (i = 0; buf[i]; i++) { |
| 224 | int char_y, mask; |
| 225 | uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8)*3; |
| 226 | |
| 227 | for (char_y = 0; char_y < font_height; char_y++) { |
| 228 | for (mask = 0x80; mask; mask >>= 1) { |
| 229 | if (font[buf[i] * font_height + char_y] & mask) |
| 230 | memcpy(p, color, 3); |
| 231 | else |
| 232 | memcpy(p, "\x00\x00\x00", 3); |
| 233 | p += 3; |
| 234 | } |
| 235 | p += pic->linesize[0] - 8*3; |
| 236 | } |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | static void drawline(AVFrame *pic, int x, int y, int len, int step) |
| 241 | { |
| 242 | int i; |
| 243 | uint8_t *p = pic->data[0] + y*pic->linesize[0] + x*3; |
| 244 | |
| 245 | for (i = 0; i < len; i++) { |
| 246 | memcpy(p, "\x00\xff\x00", 3); |
| 247 | p += step; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | static int config_video_output(AVFilterLink *outlink) |
| 252 | { |
| 253 | int i, x, y; |
| 254 | uint8_t *p; |
| 255 | AVFilterContext *ctx = outlink->src; |
| 256 | EBUR128Context *ebur128 = ctx->priv; |
| 257 | AVFrame *outpicref; |
| 258 | |
| 259 | /* check if there is enough space to represent everything decently */ |
| 260 | if (ebur128->w < 640 || ebur128->h < 480) { |
| 261 | av_log(ctx, AV_LOG_ERROR, "Video size %dx%d is too small, " |
| 262 | "minimum size is 640x480\n", ebur128->w, ebur128->h); |
| 263 | return AVERROR(EINVAL); |
| 264 | } |
| 265 | outlink->w = ebur128->w; |
| 266 | outlink->h = ebur128->h; |
| 267 | |
| 268 | #define PAD 8 |
| 269 | |
| 270 | /* configure text area position and size */ |
| 271 | ebur128->text.x = PAD; |
| 272 | ebur128->text.y = 40; |
| 273 | ebur128->text.w = 3 * 8; // 3 characters |
| 274 | ebur128->text.h = ebur128->h - PAD - ebur128->text.y; |
| 275 | |
| 276 | /* configure gauge position and size */ |
| 277 | ebur128->gauge.w = 20; |
| 278 | ebur128->gauge.h = ebur128->text.h; |
| 279 | ebur128->gauge.x = ebur128->w - PAD - ebur128->gauge.w; |
| 280 | ebur128->gauge.y = ebur128->text.y; |
| 281 | |
| 282 | /* configure graph position and size */ |
| 283 | ebur128->graph.x = ebur128->text.x + ebur128->text.w + PAD; |
| 284 | ebur128->graph.y = ebur128->gauge.y; |
| 285 | ebur128->graph.w = ebur128->gauge.x - ebur128->graph.x - PAD; |
| 286 | ebur128->graph.h = ebur128->gauge.h; |
| 287 | |
| 288 | /* graph and gauge share the LU-to-pixel code */ |
| 289 | av_assert0(ebur128->graph.h == ebur128->gauge.h); |
| 290 | |
| 291 | /* prepare the initial picref buffer */ |
| 292 | av_frame_free(&ebur128->outpicref); |
| 293 | ebur128->outpicref = outpicref = |
| 294 | ff_get_video_buffer(outlink, outlink->w, outlink->h); |
| 295 | if (!outpicref) |
| 296 | return AVERROR(ENOMEM); |
| 297 | outlink->sample_aspect_ratio = (AVRational){1,1}; |
| 298 | |
| 299 | /* init y references values (to draw LU lines) */ |
| 300 | ebur128->y_line_ref = av_calloc(ebur128->graph.h + 1, sizeof(*ebur128->y_line_ref)); |
| 301 | if (!ebur128->y_line_ref) |
| 302 | return AVERROR(ENOMEM); |
| 303 | |
| 304 | /* black background */ |
| 305 | memset(outpicref->data[0], 0, ebur128->h * outpicref->linesize[0]); |
| 306 | |
| 307 | /* draw LU legends */ |
| 308 | drawtext(outpicref, PAD, PAD+16, FONT8, font_colors+3, " LU"); |
| 309 | for (i = ebur128->meter; i >= -ebur128->meter * 2; i--) { |
| 310 | y = lu_to_y(ebur128, i); |
| 311 | x = PAD + (i < 10 && i > -10) * 8; |
| 312 | ebur128->y_line_ref[y] = i; |
| 313 | y -= 4; // -4 to center vertically |
| 314 | drawtext(outpicref, x, y + ebur128->graph.y, FONT8, font_colors+3, |
| 315 | "%c%d", i < 0 ? '-' : i > 0 ? '+' : ' ', FFABS(i)); |
| 316 | } |
| 317 | |
| 318 | /* draw graph */ |
| 319 | ebur128->y_zero_lu = lu_to_y(ebur128, 0); |
| 320 | p = outpicref->data[0] + ebur128->graph.y * outpicref->linesize[0] |
| 321 | + ebur128->graph.x * 3; |
| 322 | for (y = 0; y < ebur128->graph.h; y++) { |
| 323 | const uint8_t *c = get_graph_color(ebur128, INT_MAX, y); |
| 324 | |
| 325 | for (x = 0; x < ebur128->graph.w; x++) |
| 326 | memcpy(p + x*3, c, 3); |
| 327 | p += outpicref->linesize[0]; |
| 328 | } |
| 329 | |
| 330 | /* draw fancy rectangles around the graph and the gauge */ |
| 331 | #define DRAW_RECT(r) do { \ |
| 332 | drawline(outpicref, r.x, r.y - 1, r.w, 3); \ |
| 333 | drawline(outpicref, r.x, r.y + r.h, r.w, 3); \ |
| 334 | drawline(outpicref, r.x - 1, r.y, r.h, outpicref->linesize[0]); \ |
| 335 | drawline(outpicref, r.x + r.w, r.y, r.h, outpicref->linesize[0]); \ |
| 336 | } while (0) |
| 337 | DRAW_RECT(ebur128->graph); |
| 338 | DRAW_RECT(ebur128->gauge); |
| 339 | |
| 340 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
| 341 | |
| 342 | return 0; |
| 343 | } |
| 344 | |
| 345 | static int config_audio_input(AVFilterLink *inlink) |
| 346 | { |
| 347 | AVFilterContext *ctx = inlink->dst; |
| 348 | EBUR128Context *ebur128 = ctx->priv; |
| 349 | |
| 350 | /* Force 100ms framing in case of metadata injection: the frames must have |
| 351 | * a granularity of the window overlap to be accurately exploited. |
| 352 | * As for the true peaks mode, it just simplifies the resampling buffer |
| 353 | * allocation and the lookup in it (since sample buffers differ in size, it |
| 354 | * can be more complex to integrate in the one-sample loop of |
| 355 | * filter_frame()). */ |
| 356 | if (ebur128->metadata || (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS)) |
| 357 | inlink->min_samples = |
| 358 | inlink->max_samples = |
| 359 | inlink->partial_buf_size = inlink->sample_rate / 10; |
| 360 | return 0; |
| 361 | } |
| 362 | |
| 363 | static int config_audio_output(AVFilterLink *outlink) |
| 364 | { |
| 365 | int i; |
| 366 | AVFilterContext *ctx = outlink->src; |
| 367 | EBUR128Context *ebur128 = ctx->priv; |
| 368 | const int nb_channels = av_get_channel_layout_nb_channels(outlink->channel_layout); |
| 369 | |
| 370 | #define BACK_MASK (AV_CH_BACK_LEFT |AV_CH_BACK_CENTER |AV_CH_BACK_RIGHT| \ |
| 371 | AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_BACK_RIGHT| \ |
| 372 | AV_CH_SIDE_LEFT |AV_CH_SIDE_RIGHT| \ |
| 373 | AV_CH_SURROUND_DIRECT_LEFT |AV_CH_SURROUND_DIRECT_RIGHT) |
| 374 | |
| 375 | ebur128->nb_channels = nb_channels; |
| 376 | ebur128->ch_weighting = av_calloc(nb_channels, sizeof(*ebur128->ch_weighting)); |
| 377 | if (!ebur128->ch_weighting) |
| 378 | return AVERROR(ENOMEM); |
| 379 | |
| 380 | for (i = 0; i < nb_channels; i++) { |
| 381 | /* channel weighting */ |
| 382 | const uint16_t chl = av_channel_layout_extract_channel(outlink->channel_layout, i); |
| 383 | if (chl & (AV_CH_LOW_FREQUENCY|AV_CH_LOW_FREQUENCY_2)) { |
| 384 | ebur128->ch_weighting[i] = 0; |
| 385 | } else if (chl & BACK_MASK) { |
| 386 | ebur128->ch_weighting[i] = 1.41; |
| 387 | } else { |
| 388 | ebur128->ch_weighting[i] = 1.0; |
| 389 | } |
| 390 | |
| 391 | if (!ebur128->ch_weighting[i]) |
| 392 | continue; |
| 393 | |
| 394 | /* bins buffer for the two integration window (400ms and 3s) */ |
| 395 | ebur128->i400.cache[i] = av_calloc(I400_BINS, sizeof(*ebur128->i400.cache[0])); |
| 396 | ebur128->i3000.cache[i] = av_calloc(I3000_BINS, sizeof(*ebur128->i3000.cache[0])); |
| 397 | if (!ebur128->i400.cache[i] || !ebur128->i3000.cache[i]) |
| 398 | return AVERROR(ENOMEM); |
| 399 | } |
| 400 | |
| 401 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
| 402 | |
| 403 | #if CONFIG_SWRESAMPLE |
| 404 | if (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS) { |
| 405 | int ret; |
| 406 | |
| 407 | ebur128->swr_buf = av_malloc_array(nb_channels, 19200 * sizeof(double)); |
| 408 | ebur128->true_peaks = av_calloc(nb_channels, sizeof(*ebur128->true_peaks)); |
| 409 | ebur128->true_peaks_per_frame = av_calloc(nb_channels, sizeof(*ebur128->true_peaks_per_frame)); |
| 410 | ebur128->swr_ctx = swr_alloc(); |
| 411 | if (!ebur128->swr_buf || !ebur128->true_peaks || |
| 412 | !ebur128->true_peaks_per_frame || !ebur128->swr_ctx) |
| 413 | return AVERROR(ENOMEM); |
| 414 | |
| 415 | av_opt_set_int(ebur128->swr_ctx, "in_channel_layout", outlink->channel_layout, 0); |
| 416 | av_opt_set_int(ebur128->swr_ctx, "in_sample_rate", outlink->sample_rate, 0); |
| 417 | av_opt_set_sample_fmt(ebur128->swr_ctx, "in_sample_fmt", outlink->format, 0); |
| 418 | |
| 419 | av_opt_set_int(ebur128->swr_ctx, "out_channel_layout", outlink->channel_layout, 0); |
| 420 | av_opt_set_int(ebur128->swr_ctx, "out_sample_rate", 192000, 0); |
| 421 | av_opt_set_sample_fmt(ebur128->swr_ctx, "out_sample_fmt", outlink->format, 0); |
| 422 | |
| 423 | ret = swr_init(ebur128->swr_ctx); |
| 424 | if (ret < 0) |
| 425 | return ret; |
| 426 | } |
| 427 | #endif |
| 428 | |
| 429 | if (ebur128->peak_mode & PEAK_MODE_SAMPLES_PEAKS) { |
| 430 | ebur128->sample_peaks = av_calloc(nb_channels, sizeof(*ebur128->sample_peaks)); |
| 431 | if (!ebur128->sample_peaks) |
| 432 | return AVERROR(ENOMEM); |
| 433 | } |
| 434 | |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | #define ENERGY(loudness) (pow(10, ((loudness) + 0.691) / 10.)) |
| 439 | #define LOUDNESS(energy) (-0.691 + 10 * log10(energy)) |
| 440 | #define DBFS(energy) (20 * log10(energy)) |
| 441 | |
| 442 | static struct hist_entry *get_histogram(void) |
| 443 | { |
| 444 | int i; |
| 445 | struct hist_entry *h = av_calloc(HIST_SIZE, sizeof(*h)); |
| 446 | |
| 447 | if (!h) |
| 448 | return NULL; |
| 449 | for (i = 0; i < HIST_SIZE; i++) { |
| 450 | h[i].loudness = i / (double)HIST_GRAIN + ABS_THRES; |
| 451 | h[i].energy = ENERGY(h[i].loudness); |
| 452 | } |
| 453 | return h; |
| 454 | } |
| 455 | |
| 456 | static av_cold int init(AVFilterContext *ctx) |
| 457 | { |
| 458 | EBUR128Context *ebur128 = ctx->priv; |
| 459 | AVFilterPad pad; |
| 460 | |
| 461 | if (ebur128->loglevel != AV_LOG_INFO && |
| 462 | ebur128->loglevel != AV_LOG_VERBOSE) { |
| 463 | if (ebur128->do_video || ebur128->metadata) |
| 464 | ebur128->loglevel = AV_LOG_VERBOSE; |
| 465 | else |
| 466 | ebur128->loglevel = AV_LOG_INFO; |
| 467 | } |
| 468 | |
| 469 | if (!CONFIG_SWRESAMPLE && (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS)) { |
| 470 | av_log(ctx, AV_LOG_ERROR, |
| 471 | "True-peak mode requires libswresample to be performed\n"); |
| 472 | return AVERROR(EINVAL); |
| 473 | } |
| 474 | |
| 475 | // if meter is +9 scale, scale range is from -18 LU to +9 LU (or 3*9) |
| 476 | // if meter is +18 scale, scale range is from -36 LU to +18 LU (or 3*18) |
| 477 | ebur128->scale_range = 3 * ebur128->meter; |
| 478 | |
| 479 | ebur128->i400.histogram = get_histogram(); |
| 480 | ebur128->i3000.histogram = get_histogram(); |
| 481 | if (!ebur128->i400.histogram || !ebur128->i3000.histogram) |
| 482 | return AVERROR(ENOMEM); |
| 483 | |
| 484 | ebur128->integrated_loudness = ABS_THRES; |
| 485 | ebur128->loudness_range = 0; |
| 486 | |
| 487 | /* insert output pads */ |
| 488 | if (ebur128->do_video) { |
| 489 | pad = (AVFilterPad){ |
| 490 | .name = av_strdup("out0"), |
| 491 | .type = AVMEDIA_TYPE_VIDEO, |
| 492 | .config_props = config_video_output, |
| 493 | }; |
| 494 | if (!pad.name) |
| 495 | return AVERROR(ENOMEM); |
| 496 | ff_insert_outpad(ctx, 0, &pad); |
| 497 | } |
| 498 | pad = (AVFilterPad){ |
| 499 | .name = av_asprintf("out%d", ebur128->do_video), |
| 500 | .type = AVMEDIA_TYPE_AUDIO, |
| 501 | .config_props = config_audio_output, |
| 502 | }; |
| 503 | if (!pad.name) |
| 504 | return AVERROR(ENOMEM); |
| 505 | ff_insert_outpad(ctx, ebur128->do_video, &pad); |
| 506 | |
| 507 | /* summary */ |
| 508 | av_log(ctx, AV_LOG_VERBOSE, "EBU +%d scale\n", ebur128->meter); |
| 509 | |
| 510 | return 0; |
| 511 | } |
| 512 | |
| 513 | #define HIST_POS(power) (int)(((power) - ABS_THRES) * HIST_GRAIN) |
| 514 | |
| 515 | /* loudness and power should be set such as loudness = -0.691 + |
| 516 | * 10*log10(power), we just avoid doing that calculus two times */ |
| 517 | static int gate_update(struct integrator *integ, double power, |
| 518 | double loudness, int gate_thres) |
| 519 | { |
| 520 | int ipower; |
| 521 | double relative_threshold; |
| 522 | int gate_hist_pos; |
| 523 | |
| 524 | /* update powers histograms by incrementing current power count */ |
| 525 | ipower = av_clip(HIST_POS(loudness), 0, HIST_SIZE - 1); |
| 526 | integ->histogram[ipower].count++; |
| 527 | |
| 528 | /* compute relative threshold and get its position in the histogram */ |
| 529 | integ->sum_kept_powers += power; |
| 530 | integ->nb_kept_powers++; |
| 531 | relative_threshold = integ->sum_kept_powers / integ->nb_kept_powers; |
| 532 | if (!relative_threshold) |
| 533 | relative_threshold = 1e-12; |
| 534 | integ->rel_threshold = LOUDNESS(relative_threshold) + gate_thres; |
| 535 | gate_hist_pos = av_clip(HIST_POS(integ->rel_threshold), 0, HIST_SIZE - 1); |
| 536 | |
| 537 | return gate_hist_pos; |
| 538 | } |
| 539 | |
| 540 | static int filter_frame(AVFilterLink *inlink, AVFrame *insamples) |
| 541 | { |
| 542 | int i, ch, idx_insample; |
| 543 | AVFilterContext *ctx = inlink->dst; |
| 544 | EBUR128Context *ebur128 = ctx->priv; |
| 545 | const int nb_channels = ebur128->nb_channels; |
| 546 | const int nb_samples = insamples->nb_samples; |
| 547 | const double *samples = (double *)insamples->data[0]; |
| 548 | AVFrame *pic = ebur128->outpicref; |
| 549 | |
| 550 | #if CONFIG_SWRESAMPLE |
| 551 | if (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS) { |
| 552 | const double *swr_samples = ebur128->swr_buf; |
| 553 | int ret = swr_convert(ebur128->swr_ctx, (uint8_t**)&ebur128->swr_buf, 19200, |
| 554 | (const uint8_t **)insamples->data, nb_samples); |
| 555 | if (ret < 0) |
| 556 | return ret; |
| 557 | for (ch = 0; ch < nb_channels; ch++) |
| 558 | ebur128->true_peaks_per_frame[ch] = 0.0; |
| 559 | for (idx_insample = 0; idx_insample < ret; idx_insample++) { |
| 560 | for (ch = 0; ch < nb_channels; ch++) { |
| 561 | ebur128->true_peaks[ch] = FFMAX(ebur128->true_peaks[ch], FFABS(*swr_samples)); |
| 562 | ebur128->true_peaks_per_frame[ch] = FFMAX(ebur128->true_peaks_per_frame[ch], |
| 563 | FFABS(*swr_samples)); |
| 564 | swr_samples++; |
| 565 | } |
| 566 | } |
| 567 | } |
| 568 | #endif |
| 569 | |
| 570 | for (idx_insample = 0; idx_insample < nb_samples; idx_insample++) { |
| 571 | const int bin_id_400 = ebur128->i400.cache_pos; |
| 572 | const int bin_id_3000 = ebur128->i3000.cache_pos; |
| 573 | |
| 574 | #define MOVE_TO_NEXT_CACHED_ENTRY(time) do { \ |
| 575 | ebur128->i##time.cache_pos++; \ |
| 576 | if (ebur128->i##time.cache_pos == I##time##_BINS) { \ |
| 577 | ebur128->i##time.filled = 1; \ |
| 578 | ebur128->i##time.cache_pos = 0; \ |
| 579 | } \ |
| 580 | } while (0) |
| 581 | |
| 582 | MOVE_TO_NEXT_CACHED_ENTRY(400); |
| 583 | MOVE_TO_NEXT_CACHED_ENTRY(3000); |
| 584 | |
| 585 | for (ch = 0; ch < nb_channels; ch++) { |
| 586 | double bin; |
| 587 | |
| 588 | if (ebur128->peak_mode & PEAK_MODE_SAMPLES_PEAKS) |
| 589 | ebur128->sample_peaks[ch] = FFMAX(ebur128->sample_peaks[ch], FFABS(*samples)); |
| 590 | |
| 591 | ebur128->x[ch * 3] = *samples++; // set X[i] |
| 592 | |
| 593 | if (!ebur128->ch_weighting[ch]) |
| 594 | continue; |
| 595 | |
| 596 | /* Y[i] = X[i]*b0 + X[i-1]*b1 + X[i-2]*b2 - Y[i-1]*a1 - Y[i-2]*a2 */ |
| 597 | #define FILTER(Y, X, name) do { \ |
| 598 | double *dst = ebur128->Y + ch*3; \ |
| 599 | double *src = ebur128->X + ch*3; \ |
| 600 | dst[2] = dst[1]; \ |
| 601 | dst[1] = dst[0]; \ |
| 602 | dst[0] = src[0]*name##_B0 + src[1]*name##_B1 + src[2]*name##_B2 \ |
| 603 | - dst[1]*name##_A1 - dst[2]*name##_A2; \ |
| 604 | } while (0) |
| 605 | |
| 606 | // TODO: merge both filters in one? |
| 607 | FILTER(y, x, PRE); // apply pre-filter |
| 608 | ebur128->x[ch * 3 + 2] = ebur128->x[ch * 3 + 1]; |
| 609 | ebur128->x[ch * 3 + 1] = ebur128->x[ch * 3 ]; |
| 610 | FILTER(z, y, RLB); // apply RLB-filter |
| 611 | |
| 612 | bin = ebur128->z[ch * 3] * ebur128->z[ch * 3]; |
| 613 | |
| 614 | /* add the new value, and limit the sum to the cache size (400ms or 3s) |
| 615 | * by removing the oldest one */ |
| 616 | ebur128->i400.sum [ch] = ebur128->i400.sum [ch] + bin - ebur128->i400.cache [ch][bin_id_400]; |
| 617 | ebur128->i3000.sum[ch] = ebur128->i3000.sum[ch] + bin - ebur128->i3000.cache[ch][bin_id_3000]; |
| 618 | |
| 619 | /* override old cache entry with the new value */ |
| 620 | ebur128->i400.cache [ch][bin_id_400 ] = bin; |
| 621 | ebur128->i3000.cache[ch][bin_id_3000] = bin; |
| 622 | } |
| 623 | |
| 624 | /* For integrated loudness, gating blocks are 400ms long with 75% |
| 625 | * overlap (see BS.1770-2 p5), so a re-computation is needed each 100ms |
| 626 | * (4800 samples at 48kHz). */ |
| 627 | if (++ebur128->sample_count == 4800) { |
| 628 | double loudness_400, loudness_3000; |
| 629 | double power_400 = 1e-12, power_3000 = 1e-12; |
| 630 | AVFilterLink *outlink = ctx->outputs[0]; |
| 631 | const int64_t pts = insamples->pts + |
| 632 | av_rescale_q(idx_insample, (AVRational){ 1, inlink->sample_rate }, |
| 633 | outlink->time_base); |
| 634 | |
| 635 | ebur128->sample_count = 0; |
| 636 | |
| 637 | #define COMPUTE_LOUDNESS(m, time) do { \ |
| 638 | if (ebur128->i##time.filled) { \ |
| 639 | /* weighting sum of the last <time> ms */ \ |
| 640 | for (ch = 0; ch < nb_channels; ch++) \ |
| 641 | power_##time += ebur128->ch_weighting[ch] * ebur128->i##time.sum[ch]; \ |
| 642 | power_##time /= I##time##_BINS; \ |
| 643 | } \ |
| 644 | loudness_##time = LOUDNESS(power_##time); \ |
| 645 | } while (0) |
| 646 | |
| 647 | COMPUTE_LOUDNESS(M, 400); |
| 648 | COMPUTE_LOUDNESS(S, 3000); |
| 649 | |
| 650 | /* Integrated loudness */ |
| 651 | #define I_GATE_THRES -10 // initially defined to -8 LU in the first EBU standard |
| 652 | |
| 653 | if (loudness_400 >= ABS_THRES) { |
| 654 | double integrated_sum = 0; |
| 655 | int nb_integrated = 0; |
| 656 | int gate_hist_pos = gate_update(&ebur128->i400, power_400, |
| 657 | loudness_400, I_GATE_THRES); |
| 658 | |
| 659 | /* compute integrated loudness by summing the histogram values |
| 660 | * above the relative threshold */ |
| 661 | for (i = gate_hist_pos; i < HIST_SIZE; i++) { |
| 662 | const int nb_v = ebur128->i400.histogram[i].count; |
| 663 | nb_integrated += nb_v; |
| 664 | integrated_sum += nb_v * ebur128->i400.histogram[i].energy; |
| 665 | } |
| 666 | if (nb_integrated) |
| 667 | ebur128->integrated_loudness = LOUDNESS(integrated_sum / nb_integrated); |
| 668 | } |
| 669 | |
| 670 | /* LRA */ |
| 671 | #define LRA_GATE_THRES -20 |
| 672 | #define LRA_LOWER_PRC 10 |
| 673 | #define LRA_HIGHER_PRC 95 |
| 674 | |
| 675 | /* XXX: example code in EBU 3342 is ">=" but formula in BS.1770 |
| 676 | * specs is ">" */ |
| 677 | if (loudness_3000 >= ABS_THRES) { |
| 678 | int nb_powers = 0; |
| 679 | int gate_hist_pos = gate_update(&ebur128->i3000, power_3000, |
| 680 | loudness_3000, LRA_GATE_THRES); |
| 681 | |
| 682 | for (i = gate_hist_pos; i < HIST_SIZE; i++) |
| 683 | nb_powers += ebur128->i3000.histogram[i].count; |
| 684 | if (nb_powers) { |
| 685 | int n, nb_pow; |
| 686 | |
| 687 | /* get lower loudness to consider */ |
| 688 | n = 0; |
| 689 | nb_pow = LRA_LOWER_PRC * nb_powers / 100. + 0.5; |
| 690 | for (i = gate_hist_pos; i < HIST_SIZE; i++) { |
| 691 | n += ebur128->i3000.histogram[i].count; |
| 692 | if (n >= nb_pow) { |
| 693 | ebur128->lra_low = ebur128->i3000.histogram[i].loudness; |
| 694 | break; |
| 695 | } |
| 696 | } |
| 697 | |
| 698 | /* get higher loudness to consider */ |
| 699 | n = nb_powers; |
| 700 | nb_pow = LRA_HIGHER_PRC * nb_powers / 100. + 0.5; |
| 701 | for (i = HIST_SIZE - 1; i >= 0; i--) { |
| 702 | n -= ebur128->i3000.histogram[i].count; |
| 703 | if (n < nb_pow) { |
| 704 | ebur128->lra_high = ebur128->i3000.histogram[i].loudness; |
| 705 | break; |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | // XXX: show low & high on the graph? |
| 710 | ebur128->loudness_range = ebur128->lra_high - ebur128->lra_low; |
| 711 | } |
| 712 | } |
| 713 | |
| 714 | #define LOG_FMT "M:%6.1f S:%6.1f I:%6.1f LUFS LRA:%6.1f LU" |
| 715 | |
| 716 | /* push one video frame */ |
| 717 | if (ebur128->do_video) { |
| 718 | int x, y, ret; |
| 719 | uint8_t *p; |
| 720 | |
| 721 | const int y_loudness_lu_graph = lu_to_y(ebur128, loudness_3000 + 23); |
| 722 | const int y_loudness_lu_gauge = lu_to_y(ebur128, loudness_400 + 23); |
| 723 | |
| 724 | /* draw the graph using the short-term loudness */ |
| 725 | p = pic->data[0] + ebur128->graph.y*pic->linesize[0] + ebur128->graph.x*3; |
| 726 | for (y = 0; y < ebur128->graph.h; y++) { |
| 727 | const uint8_t *c = get_graph_color(ebur128, y_loudness_lu_graph, y); |
| 728 | |
| 729 | memmove(p, p + 3, (ebur128->graph.w - 1) * 3); |
| 730 | memcpy(p + (ebur128->graph.w - 1) * 3, c, 3); |
| 731 | p += pic->linesize[0]; |
| 732 | } |
| 733 | |
| 734 | /* draw the gauge using the momentary loudness */ |
| 735 | p = pic->data[0] + ebur128->gauge.y*pic->linesize[0] + ebur128->gauge.x*3; |
| 736 | for (y = 0; y < ebur128->gauge.h; y++) { |
| 737 | const uint8_t *c = get_graph_color(ebur128, y_loudness_lu_gauge, y); |
| 738 | |
| 739 | for (x = 0; x < ebur128->gauge.w; x++) |
| 740 | memcpy(p + x*3, c, 3); |
| 741 | p += pic->linesize[0]; |
| 742 | } |
| 743 | |
| 744 | /* draw textual info */ |
| 745 | drawtext(pic, PAD, PAD - PAD/2, FONT16, font_colors, |
| 746 | LOG_FMT " ", // padding to erase trailing characters |
| 747 | loudness_400, loudness_3000, |
| 748 | ebur128->integrated_loudness, ebur128->loudness_range); |
| 749 | |
| 750 | /* set pts and push frame */ |
| 751 | pic->pts = pts; |
| 752 | ret = ff_filter_frame(outlink, av_frame_clone(pic)); |
| 753 | if (ret < 0) |
| 754 | return ret; |
| 755 | } |
| 756 | |
| 757 | if (ebur128->metadata) { /* happens only once per filter_frame call */ |
| 758 | char metabuf[128]; |
| 759 | #define META_PREFIX "lavfi.r128." |
| 760 | |
| 761 | #define SET_META(name, var) do { \ |
| 762 | snprintf(metabuf, sizeof(metabuf), "%.3f", var); \ |
| 763 | av_dict_set(&insamples->metadata, name, metabuf, 0); \ |
| 764 | } while (0) |
| 765 | |
| 766 | #define SET_META_PEAK(name, ptype) do { \ |
| 767 | if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \ |
| 768 | char key[64]; \ |
| 769 | for (ch = 0; ch < nb_channels; ch++) { \ |
| 770 | snprintf(key, sizeof(key), \ |
| 771 | META_PREFIX AV_STRINGIFY(name) "_peaks_ch%d", ch); \ |
| 772 | SET_META(key, ebur128->name##_peaks[ch]); \ |
| 773 | } \ |
| 774 | } \ |
| 775 | } while (0) |
| 776 | |
| 777 | SET_META(META_PREFIX "M", loudness_400); |
| 778 | SET_META(META_PREFIX "S", loudness_3000); |
| 779 | SET_META(META_PREFIX "I", ebur128->integrated_loudness); |
| 780 | SET_META(META_PREFIX "LRA", ebur128->loudness_range); |
| 781 | SET_META(META_PREFIX "LRA.low", ebur128->lra_low); |
| 782 | SET_META(META_PREFIX "LRA.high", ebur128->lra_high); |
| 783 | |
| 784 | SET_META_PEAK(sample, SAMPLES); |
| 785 | SET_META_PEAK(true, TRUE); |
| 786 | } |
| 787 | |
| 788 | av_log(ctx, ebur128->loglevel, "t: %-10s " LOG_FMT, |
| 789 | av_ts2timestr(pts, &outlink->time_base), |
| 790 | loudness_400, loudness_3000, |
| 791 | ebur128->integrated_loudness, ebur128->loudness_range); |
| 792 | |
| 793 | #define PRINT_PEAKS(str, sp, ptype) do { \ |
| 794 | if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \ |
| 795 | av_log(ctx, ebur128->loglevel, " " str ":"); \ |
| 796 | for (ch = 0; ch < nb_channels; ch++) \ |
| 797 | av_log(ctx, ebur128->loglevel, " %5.1f", DBFS(sp[ch])); \ |
| 798 | av_log(ctx, ebur128->loglevel, " dBFS"); \ |
| 799 | } \ |
| 800 | } while (0) |
| 801 | |
| 802 | PRINT_PEAKS("SPK", ebur128->sample_peaks, SAMPLES); |
| 803 | PRINT_PEAKS("FTPK", ebur128->true_peaks_per_frame, TRUE); |
| 804 | PRINT_PEAKS("TPK", ebur128->true_peaks, TRUE); |
| 805 | av_log(ctx, ebur128->loglevel, "\n"); |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | return ff_filter_frame(ctx->outputs[ebur128->do_video], insamples); |
| 810 | } |
| 811 | |
| 812 | static int query_formats(AVFilterContext *ctx) |
| 813 | { |
| 814 | EBUR128Context *ebur128 = ctx->priv; |
| 815 | AVFilterFormats *formats; |
| 816 | AVFilterChannelLayouts *layouts; |
| 817 | AVFilterLink *inlink = ctx->inputs[0]; |
| 818 | AVFilterLink *outlink = ctx->outputs[0]; |
| 819 | |
| 820 | static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_NONE }; |
| 821 | static const int input_srate[] = {48000, -1}; // ITU-R BS.1770 provides coeff only for 48kHz |
| 822 | static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE }; |
| 823 | |
| 824 | /* set optional output video format */ |
| 825 | if (ebur128->do_video) { |
| 826 | formats = ff_make_format_list(pix_fmts); |
| 827 | if (!formats) |
| 828 | return AVERROR(ENOMEM); |
| 829 | ff_formats_ref(formats, &outlink->in_formats); |
| 830 | outlink = ctx->outputs[1]; |
| 831 | } |
| 832 | |
| 833 | /* set input and output audio formats |
| 834 | * Note: ff_set_common_* functions are not used because they affect all the |
| 835 | * links, and thus break the video format negotiation */ |
| 836 | formats = ff_make_format_list(sample_fmts); |
| 837 | if (!formats) |
| 838 | return AVERROR(ENOMEM); |
| 839 | ff_formats_ref(formats, &inlink->out_formats); |
| 840 | ff_formats_ref(formats, &outlink->in_formats); |
| 841 | |
| 842 | layouts = ff_all_channel_layouts(); |
| 843 | if (!layouts) |
| 844 | return AVERROR(ENOMEM); |
| 845 | ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts); |
| 846 | ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts); |
| 847 | |
| 848 | formats = ff_make_format_list(input_srate); |
| 849 | if (!formats) |
| 850 | return AVERROR(ENOMEM); |
| 851 | ff_formats_ref(formats, &inlink->out_samplerates); |
| 852 | ff_formats_ref(formats, &outlink->in_samplerates); |
| 853 | |
| 854 | return 0; |
| 855 | } |
| 856 | |
| 857 | static av_cold void uninit(AVFilterContext *ctx) |
| 858 | { |
| 859 | int i; |
| 860 | EBUR128Context *ebur128 = ctx->priv; |
| 861 | |
| 862 | av_log(ctx, AV_LOG_INFO, "Summary:\n\n" |
| 863 | " Integrated loudness:\n" |
| 864 | " I: %5.1f LUFS\n" |
| 865 | " Threshold: %5.1f LUFS\n\n" |
| 866 | " Loudness range:\n" |
| 867 | " LRA: %5.1f LU\n" |
| 868 | " Threshold: %5.1f LUFS\n" |
| 869 | " LRA low: %5.1f LUFS\n" |
| 870 | " LRA high: %5.1f LUFS", |
| 871 | ebur128->integrated_loudness, ebur128->i400.rel_threshold, |
| 872 | ebur128->loudness_range, ebur128->i3000.rel_threshold, |
| 873 | ebur128->lra_low, ebur128->lra_high); |
| 874 | |
| 875 | #define PRINT_PEAK_SUMMARY(str, sp, ptype) do { \ |
| 876 | int ch; \ |
| 877 | double maxpeak; \ |
| 878 | maxpeak = 0.0; \ |
| 879 | if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \ |
| 880 | for (ch = 0; ch < ebur128->nb_channels; ch++) \ |
| 881 | maxpeak = FFMAX(maxpeak, sp[ch]); \ |
| 882 | av_log(ctx, AV_LOG_INFO, "\n\n " str " peak:\n" \ |
| 883 | " Peak: %5.1f dBFS", \ |
| 884 | DBFS(maxpeak)); \ |
| 885 | } \ |
| 886 | } while (0) |
| 887 | |
| 888 | PRINT_PEAK_SUMMARY("Sample", ebur128->sample_peaks, SAMPLES); |
| 889 | PRINT_PEAK_SUMMARY("True", ebur128->true_peaks, TRUE); |
| 890 | av_log(ctx, AV_LOG_INFO, "\n"); |
| 891 | |
| 892 | av_freep(&ebur128->y_line_ref); |
| 893 | av_freep(&ebur128->ch_weighting); |
| 894 | av_freep(&ebur128->true_peaks); |
| 895 | av_freep(&ebur128->sample_peaks); |
| 896 | av_freep(&ebur128->true_peaks_per_frame); |
| 897 | av_freep(&ebur128->i400.histogram); |
| 898 | av_freep(&ebur128->i3000.histogram); |
| 899 | for (i = 0; i < ebur128->nb_channels; i++) { |
| 900 | av_freep(&ebur128->i400.cache[i]); |
| 901 | av_freep(&ebur128->i3000.cache[i]); |
| 902 | } |
| 903 | for (i = 0; i < ctx->nb_outputs; i++) |
| 904 | av_freep(&ctx->output_pads[i].name); |
| 905 | av_frame_free(&ebur128->outpicref); |
| 906 | #if CONFIG_SWRESAMPLE |
| 907 | av_freep(&ebur128->swr_buf); |
| 908 | swr_free(&ebur128->swr_ctx); |
| 909 | #endif |
| 910 | } |
| 911 | |
| 912 | static const AVFilterPad ebur128_inputs[] = { |
| 913 | { |
| 914 | .name = "default", |
| 915 | .type = AVMEDIA_TYPE_AUDIO, |
| 916 | .filter_frame = filter_frame, |
| 917 | .config_props = config_audio_input, |
| 918 | }, |
| 919 | { NULL } |
| 920 | }; |
| 921 | |
| 922 | AVFilter ff_af_ebur128 = { |
| 923 | .name = "ebur128", |
| 924 | .description = NULL_IF_CONFIG_SMALL("EBU R128 scanner."), |
| 925 | .priv_size = sizeof(EBUR128Context), |
| 926 | .init = init, |
| 927 | .uninit = uninit, |
| 928 | .query_formats = query_formats, |
| 929 | .inputs = ebur128_inputs, |
| 930 | .outputs = NULL, |
| 931 | .priv_class = &ebur128_class, |
| 932 | .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, |
| 933 | }; |