FFmpeg: libavfilter/f_ebur128.c Source File

FFmpeg
f_ebur128.c
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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   int dual_mono; ///< whether or not to treat single channel input files as dual-mono
143   double pan_law; ///< pan law value used to calulate dual-mono measurements
144 } EBUR128Context;
145 
146 enum {
147   PEAK_MODE_NONE = 0,
148   PEAK_MODE_SAMPLES_PEAKS = 1<<1,
149   PEAK_MODE_TRUE_PEAKS = 1<<2,
150 };
151 
152  #define OFFSET(x) offsetof(EBUR128Context, x)
153  #define A AV_OPT_FLAG_AUDIO_PARAM
154  #define V AV_OPT_FLAG_VIDEO_PARAM
155  #define F AV_OPT_FLAG_FILTERING_PARAM
156  static const AVOption ebur128_options[] = {
157  { "video", "set video output", OFFSET(do_video), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, V|F },
158  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x480"}, 0, 0, V|F },
159  { "meter", "set scale meter (+9 to +18)", OFFSET(meter), AV_OPT_TYPE_INT, {.i64 = 9}, 9, 18, V|F },
160  { "framelog", "force frame logging level", OFFSET(loglevel), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, A|V|F, "level" },
161  { "info", "information logging level", 0, AV_OPT_TYPE_CONST, {.i64 = AV_LOG_INFO}, INT_MIN, INT_MAX, A|V|F, "level" },
162  { "verbose", "verbose logging level", 0, AV_OPT_TYPE_CONST, {.i64 = AV_LOG_VERBOSE}, INT_MIN, INT_MAX, A|V|F, "level" },
163  { "metadata", "inject metadata in the filtergraph", OFFSET(metadata), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, A|V|F },
164  { "peak", "set peak mode", OFFSET(peak_mode), AV_OPT_TYPE_FLAGS, {.i64 = PEAK_MODE_NONE}, 0, INT_MAX, A|F, "mode" },
165  { "none", "disable any peak mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_NONE}, INT_MIN, INT_MAX, A|F, "mode" },
166  { "sample", "enable peak-sample mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_SAMPLES_PEAKS}, INT_MIN, INT_MAX, A|F, "mode" },
167  { "true", "enable true-peak mode", 0, AV_OPT_TYPE_CONST, {.i64 = PEAK_MODE_TRUE_PEAKS}, INT_MIN, INT_MAX, A|F, "mode" },
168  { "dualmono", "treat mono input files as dual-mono", OFFSET(dual_mono), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, A|F },
169  { "panlaw", "set a specific pan law for dual-mono files", OFFSET(pan_law), AV_OPT_TYPE_DOUBLE, {.dbl = -3.01029995663978}, -10.0, 0.0, A|F },
170  { NULL },
171 };
172 
173 AVFILTER_DEFINE_CLASS(ebur128);
174 
175  static const uint8_t graph_colors[] = {
176  0xdd, 0x66, 0x66, // value above 0LU non reached
177  0x66, 0x66, 0xdd, // value below 0LU non reached
178  0x96, 0x33, 0x33, // value above 0LU reached
179  0x33, 0x33, 0x96, // value below 0LU reached
180  0xdd, 0x96, 0x96, // value above 0LU line non reached
181  0x96, 0x96, 0xdd, // value below 0LU line non reached
182  0xdd, 0x33, 0x33, // value above 0LU line reached
183  0x33, 0x33, 0xdd, // value below 0LU line reached
184 };
185 
186  static const uint8_t *get_graph_color(const EBUR128Context *ebur128, int v, int y)
187 {
188  const int below0 = y > ebur128->y_zero_lu;
189  const int reached = y >= v;
190  const int line = ebur128->y_line_ref[y] || y == ebur128->y_zero_lu;
191  const int colorid = 4*line + 2*reached + below0;
192  return graph_colors + 3*colorid;
193 }
194 
195  static inline int lu_to_y(const EBUR128Context *ebur128, double v)
196 {
197  v += 2 * ebur128->meter; // make it in range [0;...]
198  v = av_clipf(v, 0, ebur128->scale_range); // make sure it's in the graph scale
199  v = ebur128->scale_range - v; // invert value (y=0 is on top)
200  return v * ebur128->graph.h / ebur128->scale_range; // rescale from scale range to px height
201 }
202 
203  #define FONT8 0
204  #define FONT16 1
205 
206  static const uint8_t font_colors[] = {
207  0xdd, 0xdd, 0x00,
208  0x00, 0x96, 0x96,
209 };
210 
211  static void drawtext(AVFrame *pic, int x, int y, int ftid, const uint8_t *color, const char *fmt, ...)
212 {
213  int i;
214  char buf[128] = {0};
215  const uint8_t *font;
216  int font_height;
217  va_list vl;
218 
219  if (ftid == FONT16) font = avpriv_vga16_font, font_height = 16;
220  else if (ftid == FONT8) font = avpriv_cga_font, font_height = 8;
221  else return;
222 
223  va_start(vl, fmt);
224  vsnprintf(buf, sizeof(buf), fmt, vl);
225  va_end(vl);
226 
227  for (i = 0; buf[i]; i++) {
228  int char_y, mask;
229  uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8)*3;
230 
231  for (char_y = 0; char_y < font_height; char_y++) {
232  for (mask = 0x80; mask; mask >>= 1) {
233  if (font[buf[i] * font_height + char_y] & mask)
234  memcpy(p, color, 3);
235  else
236  memcpy(p, "\x00\x00\x00", 3);
237  p += 3;
238  }
239  p += pic->linesize[0] - 8*3;
240  }
241  }
242 }
243 
244  static void drawline(AVFrame *pic, int x, int y, int len, int step)
245 {
246  int i;
247  uint8_t *p = pic->data[0] + y*pic->linesize[0] + x*3;
248 
249  for (i = 0; i < len; i++) {
250  memcpy(p, "\x00\xff\x00", 3);
251  p += step;
252  }
253 }
254 
255  static int config_video_output(AVFilterLink *outlink)
256 {
257  int i, x, y;
258  uint8_t *p;
259  AVFilterContext *ctx = outlink->src;
260  EBUR128Context *ebur128 = ctx->priv;
261  AVFrame *outpicref;
262 
263  /* check if there is enough space to represent everything decently */
264  if (ebur128->w < 640 || ebur128->h < 480) {
265  av_log(ctx, AV_LOG_ERROR, "Video size %dx%d is too small, "
266  "minimum size is 640x480\n", ebur128->w, ebur128->h);
267  return AVERROR(EINVAL);
268  }
269  outlink->w = ebur128->w;
270  outlink->h = ebur128->h;
271 
272 #define PAD 8
273 
274  /* configure text area position and size */
275  ebur128->text.x = PAD;
276  ebur128->text.y = 40;
277  ebur128->text.w = 3 * 8; // 3 characters
278  ebur128->text.h = ebur128->h - PAD - ebur128->text.y;
279 
280  /* configure gauge position and size */
281  ebur128->gauge.w = 20;
282  ebur128->gauge.h = ebur128->text.h;
283  ebur128->gauge.x = ebur128->w - PAD - ebur128->gauge.w;
284  ebur128->gauge.y = ebur128->text.y;
285 
286  /* configure graph position and size */
287  ebur128->graph.x = ebur128->text.x + ebur128->text.w + PAD;
288  ebur128->graph.y = ebur128->gauge.y;
289  ebur128->graph.w = ebur128->gauge.x - ebur128->graph.x - PAD;
290  ebur128->graph.h = ebur128->gauge.h;
291 
292  /* graph and gauge share the LU-to-pixel code */
293  av_assert0(ebur128->graph.h == ebur128->gauge.h);
294 
295  /* prepare the initial picref buffer */
296  av_frame_free(&ebur128->outpicref);
297  ebur128->outpicref = outpicref =
298  ff_get_video_buffer(outlink, outlink->w, outlink->h);
299  if (!outpicref)
300  return AVERROR(ENOMEM);
301  outlink->sample_aspect_ratio = (AVRational){1,1};
302 
303  /* init y references values (to draw LU lines) */
304  ebur128->y_line_ref = av_calloc(ebur128->graph.h + 1, sizeof(*ebur128->y_line_ref));
305  if (!ebur128->y_line_ref)
306  return AVERROR(ENOMEM);
307 
308  /* black background */
309  memset(outpicref->data[0], 0, ebur128->h * outpicref->linesize[0]);
310 
311  /* draw LU legends */
312  drawtext(outpicref, PAD, PAD+16, FONT8, font_colors+3, " LU");
313  for (i = ebur128->meter; i >= -ebur128->meter * 2; i--) {
314  y = lu_to_y(ebur128, i);
315  x = PAD + (i < 10 && i > -10) * 8;
316  ebur128->y_line_ref[y] = i;
317  y -= 4; // -4 to center vertically
318  drawtext(outpicref, x, y + ebur128->graph.y, FONT8, font_colors+3,
319  "%c%d", i < 0 ? '-' : i > 0 ? '+' : ' ', FFABS(i));
320  }
321 
322  /* draw graph */
323  ebur128->y_zero_lu = lu_to_y(ebur128, 0);
324  p = outpicref->data[0] + ebur128->graph.y * outpicref->linesize[0]
325  + ebur128->graph.x * 3;
326  for (y = 0; y < ebur128->graph.h; y++) {
327  const uint8_t *c = get_graph_color(ebur128, INT_MAX, y);
328 
329  for (x = 0; x < ebur128->graph.w; x++)
330  memcpy(p + x*3, c, 3);
331  p += outpicref->linesize[0];
332  }
333 
334  /* draw fancy rectangles around the graph and the gauge */
335 #define DRAW_RECT(r) do { \
336  drawline(outpicref, r.x, r.y - 1, r.w, 3); \
337  drawline(outpicref, r.x, r.y + r.h, r.w, 3); \
338  drawline(outpicref, r.x - 1, r.y, r.h, outpicref->linesize[0]); \
339  drawline(outpicref, r.x + r.w, r.y, r.h, outpicref->linesize[0]); \
340 } while (0)
341  DRAW_RECT(ebur128->graph);
342  DRAW_RECT(ebur128->gauge);
343 
344  return 0;
345 }
346 
347  static int config_audio_input(AVFilterLink *inlink)
348 {
349  AVFilterContext *ctx = inlink->dst;
350  EBUR128Context *ebur128 = ctx->priv;
351 
352  /* Force 100ms framing in case of metadata injection: the frames must have
353  * a granularity of the window overlap to be accurately exploited.
354  * As for the true peaks mode, it just simplifies the resampling buffer
355  * allocation and the lookup in it (since sample buffers differ in size, it
356  * can be more complex to integrate in the one-sample loop of
357  * filter_frame()). */
358  if (ebur128->metadata || (ebur128->peak_mode & PEAK_MODE_TRUE_PEAKS))
359  inlink->min_samples =
360  inlink->max_samples =
361  inlink->partial_buf_size = inlink->sample_rate / 10;
362  return 0;
363 }
364 
365  static int config_audio_output(AVFilterLink *outlink)
366 {
367  int i;
368  AVFilterContext *ctx = outlink->src;
369  EBUR128Context *ebur128 = ctx->priv;
370  const int nb_channels = av_get_channel_layout_nb_channels(outlink->channel_layout);
371 
372 #define BACK_MASK (AV_CH_BACK_LEFT |AV_CH_BACK_CENTER |AV_CH_BACK_RIGHT| \
373  AV_CH_TOP_BACK_LEFT|AV_CH_TOP_BACK_CENTER|AV_CH_TOP_BACK_RIGHT| \
374  AV_CH_SIDE_LEFT |AV_CH_SIDE_RIGHT| \
375  AV_CH_SURROUND_DIRECT_LEFT |AV_CH_SURROUND_DIRECT_RIGHT)
376 
377  ebur128->nb_channels = nb_channels;
378  ebur128->ch_weighting = av_calloc(nb_channels, sizeof(*ebur128->ch_weighting));
379  if (!ebur128->ch_weighting)
380  return AVERROR(ENOMEM);
381 
382  for (i = 0; i < nb_channels; i++) {
383  /* channel weighting */
384  const uint16_t chl = av_channel_layout_extract_channel(outlink->channel_layout, i);
385  if (chl & (AV_CH_LOW_FREQUENCY|AV_CH_LOW_FREQUENCY_2)) {
386  ebur128->ch_weighting[i] = 0;
387  } else if (chl & BACK_MASK) {
388  ebur128->ch_weighting[i] = 1.41;
389  } else {
390  ebur128->ch_weighting[i] = 1.0;
391  }
392 
393  if (!ebur128->ch_weighting[i])
394  continue;
395 
396  /* bins buffer for the two integration window (400ms and 3s) */
397  ebur128->i400.cache[i] = av_calloc(I400_BINS, sizeof(*ebur128->i400.cache[0]));
398  ebur128->i3000.cache[i] = av_calloc(I3000_BINS, sizeof(*ebur128->i3000.cache[0]));
399  if (!ebur128->i400.cache[i] || !ebur128->i3000.cache[i])
400  return AVERROR(ENOMEM);
401  }
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) (ff_exp10(((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], fabs(*swr_samples));
562  ebur128->true_peaks_per_frame[ch] = FFMAX(ebur128->true_peaks_per_frame[ch],
563  fabs(*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], fabs(*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  /* dual-mono correction */
669  if (nb_channels == 1 && ebur128->dual_mono) {
670  ebur128->integrated_loudness -= ebur128->pan_law;
671  }
672  }
673  }
674 
675  /* LRA */
676 #define LRA_GATE_THRES -20
677 #define LRA_LOWER_PRC 10
678 #define LRA_HIGHER_PRC 95
679 
680  /* XXX: example code in EBU 3342 is ">=" but formula in BS.1770
681  * specs is ">" */
682  if (loudness_3000 >= ABS_THRES) {
683  int nb_powers = 0;
684  int gate_hist_pos = gate_update(&ebur128->i3000, power_3000,
685  loudness_3000, LRA_GATE_THRES);
686 
687  for (i = gate_hist_pos; i < HIST_SIZE; i++)
688  nb_powers += ebur128->i3000.histogram[i].count;
689  if (nb_powers) {
690  int n, nb_pow;
691 
692  /* get lower loudness to consider */
693  n = 0;
694  nb_pow = LRA_LOWER_PRC * nb_powers / 100. + 0.5;
695  for (i = gate_hist_pos; i < HIST_SIZE; i++) {
696  n += ebur128->i3000.histogram[i].count;
697  if (n >= nb_pow) {
698  ebur128->lra_low = ebur128->i3000.histogram[i].loudness;
699  break;
700  }
701  }
702 
703  /* get higher loudness to consider */
704  n = nb_powers;
705  nb_pow = LRA_HIGHER_PRC * nb_powers / 100. + 0.5;
706  for (i = HIST_SIZE - 1; i >= 0; i--) {
707  n -= ebur128->i3000.histogram[i].count;
708  if (n < nb_pow) {
709  ebur128->lra_high = ebur128->i3000.histogram[i].loudness;
710  break;
711  }
712  }
713 
714  // XXX: show low & high on the graph?
715  ebur128->loudness_range = ebur128->lra_high - ebur128->lra_low;
716  }
717  }
718 
719  /* dual-mono correction */
720  if (nb_channels == 1 && ebur128->dual_mono) {
721  loudness_400 -= ebur128->pan_law;
722  loudness_3000 -= ebur128->pan_law;
723  }
724 
725 #define LOG_FMT "M:%6.1f S:%6.1f I:%6.1f LUFS LRA:%6.1f LU"
726 
727  /* push one video frame */
728  if (ebur128->do_video) {
729  int x, y, ret;
730  uint8_t *p;
731 
732  const int y_loudness_lu_graph = lu_to_y(ebur128, loudness_3000 + 23);
733  const int y_loudness_lu_gauge = lu_to_y(ebur128, loudness_400 + 23);
734 
735  /* draw the graph using the short-term loudness */
736  p = pic->data[0] + ebur128->graph.y*pic->linesize[0] + ebur128->graph.x*3;
737  for (y = 0; y < ebur128->graph.h; y++) {
738  const uint8_t *c = get_graph_color(ebur128, y_loudness_lu_graph, y);
739 
740  memmove(p, p + 3, (ebur128->graph.w - 1) * 3);
741  memcpy(p + (ebur128->graph.w - 1) * 3, c, 3);
742  p += pic->linesize[0];
743  }
744 
745  /* draw the gauge using the momentary loudness */
746  p = pic->data[0] + ebur128->gauge.y*pic->linesize[0] + ebur128->gauge.x*3;
747  for (y = 0; y < ebur128->gauge.h; y++) {
748  const uint8_t *c = get_graph_color(ebur128, y_loudness_lu_gauge, y);
749 
750  for (x = 0; x < ebur128->gauge.w; x++)
751  memcpy(p + x*3, c, 3);
752  p += pic->linesize[0];
753  }
754 
755  /* draw textual info */
756  drawtext(pic, PAD, PAD - PAD/2, FONT16, font_colors,
757  LOG_FMT " ", // padding to erase trailing characters
758  loudness_400, loudness_3000,
759  ebur128->integrated_loudness, ebur128->loudness_range);
760 
761  /* set pts and push frame */
762  pic->pts = pts;
763  ret = ff_filter_frame(outlink, av_frame_clone(pic));
764  if (ret < 0)
765  return ret;
766  }
767 
768  if (ebur128->metadata) { /* happens only once per filter_frame call */
769  char metabuf[128];
770 #define META_PREFIX "lavfi.r128."
771 
772 #define SET_META(name, var) do { \
773  snprintf(metabuf, sizeof(metabuf), "%.3f", var); \
774  av_dict_set(&insamples->metadata, name, metabuf, 0); \
775 } while (0)
776 
777 #define SET_META_PEAK(name, ptype) do { \
778  if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
779  char key[64]; \
780  for (ch = 0; ch < nb_channels; ch++) { \
781  snprintf(key, sizeof(key), \
782  META_PREFIX AV_STRINGIFY(name) "_peaks_ch%d", ch); \
783  SET_META(key, ebur128->name##_peaks[ch]); \
784  } \
785  } \
786 } while (0)
787 
788  SET_META(META_PREFIX "M", loudness_400);
789  SET_META(META_PREFIX "S", loudness_3000);
790  SET_META(META_PREFIX "I", ebur128->integrated_loudness);
791  SET_META(META_PREFIX "LRA", ebur128->loudness_range);
792  SET_META(META_PREFIX "LRA.low", ebur128->lra_low);
793  SET_META(META_PREFIX "LRA.high", ebur128->lra_high);
794 
795  SET_META_PEAK(sample, SAMPLES);
796  SET_META_PEAK(true, TRUE);
797  }
798 
799  av_log(ctx, ebur128->loglevel, "t: %-10s " LOG_FMT,
800  av_ts2timestr(pts, &outlink->time_base),
801  loudness_400, loudness_3000,
802  ebur128->integrated_loudness, ebur128->loudness_range);
803 
804 #define PRINT_PEAKS(str, sp, ptype) do { \
805  if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
806  av_log(ctx, ebur128->loglevel, " " str ":"); \
807  for (ch = 0; ch < nb_channels; ch++) \
808  av_log(ctx, ebur128->loglevel, " %5.1f", DBFS(sp[ch])); \
809  av_log(ctx, ebur128->loglevel, " dBFS"); \
810  } \
811 } while (0)
812 
813  PRINT_PEAKS("SPK", ebur128->sample_peaks, SAMPLES);
814  PRINT_PEAKS("FTPK", ebur128->true_peaks_per_frame, TRUE);
815  PRINT_PEAKS("TPK", ebur128->true_peaks, TRUE);
816  av_log(ctx, ebur128->loglevel, "\n");
817  }
818  }
819 
820  return ff_filter_frame(ctx->outputs[ebur128->do_video], insamples);
821 }
822 
823  static int query_formats(AVFilterContext *ctx)
824 {
825  EBUR128Context *ebur128 = ctx->priv;
826  AVFilterFormats *formats;
827  AVFilterChannelLayouts *layouts;
828  AVFilterLink *inlink = ctx->inputs[0];
829  AVFilterLink *outlink = ctx->outputs[0];
830  int ret;
831 
832  static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_NONE };
833  static const int input_srate[] = {48000, -1}; // ITU-R BS.1770 provides coeff only for 48kHz
834  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGB24, AV_PIX_FMT_NONE };
835 
836  /* set optional output video format */
837  if (ebur128->do_video) {
838  formats = ff_make_format_list(pix_fmts);
839  if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
840  return ret;
841  outlink = ctx->outputs[1];
842  }
843 
844  /* set input and output audio formats
845  * Note: ff_set_common_* functions are not used because they affect all the
846  * links, and thus break the video format negotiation */
847  formats = ff_make_format_list(sample_fmts);
848  if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0 ||
849  (ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
850  return ret;
851 
852  layouts = ff_all_channel_layouts();
853  if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0 ||
854  (ret = ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts)) < 0)
855  return ret;
856 
857  formats = ff_make_format_list(input_srate);
858  if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0 ||
859  (ret = ff_formats_ref(formats, &outlink->in_samplerates)) < 0)
860  return ret;
861 
862  return 0;
863 }
864 
865  static av_cold void uninit(AVFilterContext *ctx)
866 {
867  int i;
868  EBUR128Context *ebur128 = ctx->priv;
869 
870  /* dual-mono correction */
871  if (ebur128->nb_channels == 1 && ebur128->dual_mono) {
872  ebur128->i400.rel_threshold -= ebur128->pan_law;
873  ebur128->i3000.rel_threshold -= ebur128->pan_law;
874  ebur128->lra_low -= ebur128->pan_law;
875  ebur128->lra_high -= ebur128->pan_law;
876  }
877 
878  av_log(ctx, AV_LOG_INFO, "Summary:\n\n"
879  " Integrated loudness:\n"
880  " I: %5.1f LUFS\n"
881  " Threshold: %5.1f LUFS\n\n"
882  " Loudness range:\n"
883  " LRA: %5.1f LU\n"
884  " Threshold: %5.1f LUFS\n"
885  " LRA low: %5.1f LUFS\n"
886  " LRA high: %5.1f LUFS",
887  ebur128->integrated_loudness, ebur128->i400.rel_threshold,
888  ebur128->loudness_range, ebur128->i3000.rel_threshold,
889  ebur128->lra_low, ebur128->lra_high);
890 
891 #define PRINT_PEAK_SUMMARY(str, sp, ptype) do { \
892  int ch; \
893  double maxpeak; \
894  maxpeak = 0.0; \
895  if (ebur128->peak_mode & PEAK_MODE_ ## ptype ## _PEAKS) { \
896  for (ch = 0; ch < ebur128->nb_channels; ch++) \
897  maxpeak = FFMAX(maxpeak, sp[ch]); \
898  av_log(ctx, AV_LOG_INFO, "\n\n " str " peak:\n" \
899  " Peak: %5.1f dBFS", \
900  DBFS(maxpeak)); \
901  } \
902 } while (0)
903 
904  PRINT_PEAK_SUMMARY("Sample", ebur128->sample_peaks, SAMPLES);
905  PRINT_PEAK_SUMMARY("True", ebur128->true_peaks, TRUE);
906  av_log(ctx, AV_LOG_INFO, "\n");
907 
908  av_freep(&ebur128->y_line_ref);
909  av_freep(&ebur128->ch_weighting);
910  av_freep(&ebur128->true_peaks);
911  av_freep(&ebur128->sample_peaks);
912  av_freep(&ebur128->true_peaks_per_frame);
913  av_freep(&ebur128->i400.histogram);
914  av_freep(&ebur128->i3000.histogram);
915  for (i = 0; i < ebur128->nb_channels; i++) {
916  av_freep(&ebur128->i400.cache[i]);
917  av_freep(&ebur128->i3000.cache[i]);
918  }
919  for (i = 0; i < ctx->nb_outputs; i++)
920  av_freep(&ctx->output_pads[i].name);
921  av_frame_free(&ebur128->outpicref);
922 #if CONFIG_SWRESAMPLE
923  av_freep(&ebur128->swr_buf);
924  swr_free(&ebur128->swr_ctx);
925 #endif
926 }
927 
928  static const AVFilterPad ebur128_inputs[] = {
929  {
930  .name = "default",
931  .type = AVMEDIA_TYPE_AUDIO,
932  .filter_frame = filter_frame,
933  .config_props = config_audio_input,
934  },
935  { NULL }
936 };
937 
938  AVFilter ff_af_ebur128 = {
939  .name = "ebur128",
940  .description = NULL_IF_CONFIG_SMALL("EBU R128 scanner."),
941  .priv_size = sizeof(EBUR128Context),
942  .init = init,
943  .uninit = uninit,
944  .query_formats = query_formats,
945  .inputs = ebur128_inputs,
946  .outputs = NULL,
947  .priv_class = &ebur128_class,
948  .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
949 };
NULL
#define NULL
Definition: coverity.c:32
get_histogram
static struct hist_entry * get_histogram(void)
Definition: f_ebur128.c:442
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
EBUR128Context::scale_range
int scale_range
the range of LU values according to the meter
Definition: f_ebur128.c:114
h
h
Definition: vp9dsp_template.c:2093
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: f_ebur128.c:823
EBUR128Context::lra_low
double lra_low
Definition: f_ebur128.c:137
AVOption
AVOption.
Definition: opt.h:245
PEAK_MODE_NONE
Definition: f_ebur128.c:147
EBUR128Context::true_peaks_per_frame
double * true_peaks_per_frame
true peaks in a frame per channel
Definition: f_ebur128.c:99
ctx
AVFormatContext * ctx
Definition: movenc-test.c:48
fmt
const char * fmt
Definition: avisynth_c.h:632
LRA_HIGHER_PRC
#define LRA_HIGHER_PRC
integrator::histogram
struct hist_entry * histogram
histogram of the powers, used to compute LRA and I
Definition: f_ebur128.c:87
config_video_output
static int config_video_output(AVFilterLink *outlink)
Definition: f_ebur128.c:255
EBUR128Context::sample_count
int sample_count
sample count used for refresh frequency, reset at refresh
Definition: f_ebur128.c:121
I_GATE_THRES
#define I_GATE_THRES
avfilter.h
Main libavfilter public API header.
AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:65
EBUR128Context::y_zero_lu
int y_zero_lu
the y value (pixel position) for 0 LU
Definition: f_ebur128.c:115
AV_OPT_TYPE_INT
Definition: opt.h:223
config_audio_output
static int config_audio_output(AVFilterLink *outlink)
Definition: f_ebur128.c:365
lu_to_y
static int lu_to_y(const EBUR128Context *ebur128, double v)
Definition: f_ebur128.c:195
COMPUTE_LOUDNESS
#define COMPUTE_LOUDNESS(m, time)
init
static av_cold int init(AVFilterContext *ctx)
Definition: f_ebur128.c:456
integrator::cache_pos
int cache_pos
focus on the last added bin in the cache array
Definition: f_ebur128.c:81
SET_META_PEAK
#define SET_META_PEAK(name, ptype)
vsnprintf
#define vsnprintf
Definition: snprintf.h:36
ff_af_ebur128
AVFilter ff_af_ebur128
Definition: f_ebur128.c:938
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:60
AV_CH_LOW_FREQUENCY_2
#define AV_CH_LOW_FREQUENCY_2
Definition: channel_layout.h:73
avpriv_vga16_font
const uint8_t avpriv_vga16_font[4096]
Definition: xga_font_data.c:160
EBUR128Context::do_video
int do_video
1 if video output enabled, 0 otherwise
Definition: f_ebur128.c:107
formats
static enum AVSampleFormat formats[]
Definition: avresample-test.c:162
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:76
ebur128_options
static const AVOption ebur128_options[]
Definition: f_ebur128.c:156
HIST_SIZE
#define HIST_SIZE
Definition: f_ebur128.c:64
sample
#define sample
Definition: flacdsp_template.c:44
PRINT_PEAKS
#define PRINT_PEAKS(str, sp, ptype)
AV_OPT_TYPE_FLAGS
Definition: opt.h:222
EBUR128Context::nb_channels
int nb_channels
number of channels in the input
Definition: f_ebur128.c:119
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
av_get_channel_layout_nb_channels
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
Definition: channel_layout.c:198
F
#define F
Definition: f_ebur128.c:155
FONT16
#define FONT16
Definition: f_ebur128.c:204
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(ebur128)
EBUR128Context::metadata
int metadata
whether or not to inject loudness results in frames
Definition: f_ebur128.c:141
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:59
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:312
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
HIST_GRAIN
#define HIST_GRAIN
defines histogram precision
Definition: f_ebur128.c:63
dict.h
Public dictionary API.
AV_OPT_TYPE_CONST
Definition: opt.h:231
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:435
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1163
AVFilterContext::output_pads
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:315
M
#define M(a, b)
Definition: vp3dsp.c:44
normalize.loudness
int loudness
Definition: normalize.py:20
uint8_t
uint8_t
Definition: audio_convert.c:194
swr_alloc
av_cold struct SwrContext * swr_alloc(void)
Allocate SwrContext.
Definition: options.c:148
av_cold
#define av_cold
Definition: attributes.h:82
drawtext
static void drawtext(AVFrame *pic, int x, int y, int ftid, const uint8_t *color, const char *fmt,...)
Definition: f_ebur128.c:211
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
Definition: f_ebur128.c:540
opt.h
AVOptions.
integrator::sum_kept_powers
double sum_kept_powers
sum of the powers (weighted sums) above absolute threshold
Definition: f_ebur128.c:85
timestamp.h
timestamp utils, mostly useful for debugging/logging purposes
drawline
static void drawline(AVFrame *pic, int x, int y, int len, int step)
Definition: f_ebur128.c:244
integrator::cache
double * cache[MAX_CHANNELS]
window of filtered samples (N ms)
Definition: f_ebur128.c:80
EBUR128Context::i3000
struct integrator i3000
3s integrator, used for Short term loudness (S), and Loudness Range (LRA)
Definition: f_ebur128.c:132
rect::y
int y
Definition: f_ebur128.c:90
EBUR128Context::integrated_loudness
double integrated_loudness
integrated loudness in LUFS (I)
Definition: f_ebur128.c:135
EBUR128Context::true_peaks
double * true_peaks
true peaks per channel
Definition: f_ebur128.c:97
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:262
font_colors
static const uint8_t font_colors[]
Definition: f_ebur128.c:206
AV_CH_LOW_FREQUENCY
#define AV_CH_LOW_FREQUENCY
Definition: channel_layout.h:52
EBUR128Context::meter
int meter
select a EBU mode between +9 and +18
Definition: f_ebur128.c:113
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
AVFILTER_FLAG_DYNAMIC_OUTPUTS
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:108
hist_entry
A histogram is an array of HIST_SIZE hist_entry storing all the energies recorded (with an accuracy o...
Definition: f_ebur128.c:73
EBUR128Context::outpicref
AVFrame * outpicref
output picture reference, updated regularly
Definition: f_ebur128.c:112
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
MAX_CHANNELS
#define MAX_CHANNELS
Definition: f_ebur128.c:45
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:53
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
swresample.h
libswresample public header
EBUR128Context::sample_peaks
double * sample_peaks
sample peaks per channel
Definition: f_ebur128.c:98
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
avpriv_cga_font
const uint8_t avpriv_cga_font[2048]
Definition: xga_font_data.c:29
hist_entry::count
int count
how many times the corresponding value occurred
Definition: f_ebur128.c:74
mask
static const uint16_t mask[17]
Definition: lzw.c:38
S
#define S(s, c, i)
Definition: flacdsp_template.c:46
AVERROR
#define AVERROR(e)
Definition: error.h:43
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
av_ts2timestr
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
AVFilterContext::nb_outputs
unsigned nb_outputs
number of output pads
Definition: avfilter.h:317
SwrContext
The libswresample context.
Definition: swresample_internal.h:95
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:319
av_opt_set_int
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:486
line
Definition: graph2dot.c:48
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:194
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
MOVE_TO_NEXT_CACHED_ENTRY
#define MOVE_TO_NEXT_CACHED_ENTRY(time)
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
EBUR128Context::i400
struct integrator i400
400ms integrator, used for Momentary loudness (M), and Integrated loudness (I)
Definition: f_ebur128.c:131
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: f_ebur128.c:865
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
I3000_BINS
#define I3000_BINS
Definition: f_ebur128.c:130
EBUR128Context::y_line_ref
int * y_line_ref
y reference values for drawing the LU lines in the graph and the gauge
Definition: f_ebur128.c:116
EBUR128Context::graph
struct rect graph
rectangle for the main graph in the center
Definition: f_ebur128.c:110
channel_layout.h
audio channel layout utility functions
PEAK_MODE_TRUE_PEAKS
Definition: f_ebur128.c:149
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
hist_entry::loudness
double loudness
L = -0.691 + 10 * log10(E)
Definition: f_ebur128.c:76
AV_OPT_TYPE_BOOL
Definition: opt.h:239
LOG_FMT
#define LOG_FMT
integrator::rel_threshold
double rel_threshold
relative threshold
Definition: f_ebur128.c:84
TRUE
#define TRUE
Definition: windows2linux.h:33
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
LRA_LOWER_PRC
#define LRA_LOWER_PRC
n
int n
Definition: avisynth_c.h:547
AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:65
EBUR128Context::loudness_range
double loudness_range
loudness range in LU (LRA)
Definition: f_ebur128.c:136
ENERGY
#define ENERGY(loudness)
Definition: f_ebur128.c:438
outputs
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:385
HIST_POS
#define HIST_POS(power)
Definition: f_ebur128.c:513
OFFSET
#define OFFSET(x)
Definition: f_ebur128.c:152
ff_all_channel_layouts
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:401
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:461
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
inputs
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:375
AV_OPT_TYPE_DOUBLE
Definition: opt.h:225
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
av_strdup
char * av_strdup(const char *s)
Duplicate the string s.
Definition: mem.c:267
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:209
ABS_THRES
#define ABS_THRES
silence gate: we discard anything below this absolute (LUFS) threshold
Definition: f_ebur128.c:61
swr_free
av_cold void swr_free(SwrContext **ss)
Free the given SwrContext and set the pointer to NULL.
Definition: swresample.c:140
rect::x
int x
Definition: f_ebur128.c:90
buf
void * buf
Definition: avisynth_c.h:553
integrator::nb_kept_powers
int nb_kept_powers
number of sum above absolute threshold
Definition: f_ebur128.c:86
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:141
rect
Definition: f_ebur128.c:90
AVRational
rational number numerator/denominator
Definition: rational.h:43
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:145
rect::h
int h
Definition: f_ebur128.c:90
AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:232
swr_convert
int attribute_align_arg swr_convert(struct SwrContext *s, uint8_t *out_arg[SWR_CH_MAX], int out_count, const uint8_t *in_arg[SWR_CH_MAX], int in_count)
Definition: swresample.c:695
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:316
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:262
PEAK_MODE_SAMPLES_PEAKS
Definition: f_ebur128.c:148
LOUDNESS
#define LOUDNESS(energy)
Definition: f_ebur128.c:439
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:260
pts
static int64_t pts
Global timestamp for the audio frames.
Definition: transcode_aac.c:547
flags
static int flags
Definition: cpu.c:47
EBUR128Context::dual_mono
int dual_mono
whether or not to treat single channel input files as dual-mono
Definition: f_ebur128.c:142
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:192
EBUR128Context::text
struct rect text
rectangle for the LU legend on the left
Definition: f_ebur128.c:109
META_PREFIX
#define META_PREFIX
if
if(ret< 0)
Definition: vf_mcdeint.c:282
ebur128_inputs
static const AVFilterPad ebur128_inputs[]
Definition: f_ebur128.c:928
EBUR128Context::h
int h
size of the video output
Definition: f_ebur128.c:108
PRINT_PEAK_SUMMARY
#define PRINT_PEAK_SUMMARY(str, sp, ptype)
av_channel_layout_extract_channel
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
Get the channel with the given index in channel_layout.
Definition: channel_layout.c:243
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
EBUR128Context::gauge
struct rect gauge
rectangle for the gauge on the right
Definition: f_ebur128.c:111
rect::w
int w
Definition: f_ebur128.c:90
DRAW_RECT
#define DRAW_RECT(r)
I400_BINS
#define I400_BINS
Definition: f_ebur128.c:129
config_audio_input
static int config_audio_input(AVFilterLink *inlink)
Definition: f_ebur128.c:347
A
#define A
Definition: f_ebur128.c:153
FONT8
#define FONT8
Definition: f_ebur128.c:203
gate_update
static int gate_update(struct integrator *integ, double power, double loudness, int gate_thres)
Definition: f_ebur128.c:517
EBUR128Context::loglevel
int loglevel
log level for frame logging
Definition: f_ebur128.c:140
EBUR128Context::x
double x[MAX_CHANNELS *3]
3 input samples cache for each channel
Definition: f_ebur128.c:125
V
#define V
Definition: f_ebur128.c:154
len
int len
Definition: vorbis_enc_data.h:452
FILTER
#define FILTER(Y, X, name)
EBUR128Context::lra_high
double lra_high
low and high LRA values
Definition: f_ebur128.c:137
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
PAD
#define PAD
AVFilterContext
An instance of a filter.
Definition: avfilter.h:304
LRA_GATE_THRES
#define LRA_GATE_THRES
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
integrator::sum
double sum[MAX_CHANNELS]
sum of the last N ms filtered samples (cache content)
Definition: f_ebur128.c:82
EBUR128Context::z
double z[MAX_CHANNELS *3]
3 RLB-filter samples cache for each channel
Definition: f_ebur128.c:127
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
SET_META
#define SET_META(name, var)
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
EBUR128Context::peak_mode
int peak_mode
enabled peak modes
Definition: f_ebur128.c:96
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
EBUR128Context::ch_weighting
double * ch_weighting
channel weighting mapping
Definition: f_ebur128.c:120
nb_channels
int nb_channels
Definition: channel_layout.c:76
EBUR128Context::pan_law
double pan_law
pan law value used to calulate dual-mono measurements
Definition: f_ebur128.c:143
internal.h
internal API functions
av_opt_set_sample_fmt
int av_opt_set_sample_fmt(void *obj, const char *name, enum AVSampleFormat fmt, int search_flags)
Definition: opt.c:604
ff_insert_outpad
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:291
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:235
graph_colors
static const uint8_t graph_colors[]
Definition: f_ebur128.c:175
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
xga_font_data.h
CGA/EGA/VGA ROM font data.
swr_init
av_cold int swr_init(struct SwrContext *s)
Initialize context after user parameters have been set.
Definition: swresample.c:155
hist_entry::energy
double energy
E = 10^((L + 0.691) / 10)
Definition: f_ebur128.c:75
SAMPLES
#define SAMPLES
Definition: swresample-test.c:32
BACK_MASK
#define BACK_MASK
integrator::filled
int filled
1 if the cache is completely filled, 0 otherwise
Definition: f_ebur128.c:83
get_graph_color
static const uint8_t * get_graph_color(const EBUR128Context *ebur128, int v, int y)
Definition: f_ebur128.c:186
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