FFmpeg
af_volume.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
3  * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * audio volume filter
25  */
26 
27 #include "libavutil/channel_layout.h"
28 #include "libavutil/common.h"
29 #include "libavutil/eval.h"
30 #include "libavutil/ffmath.h"
31 #include "libavutil/float_dsp.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/replaygain.h"
35 
36 #include "audio.h"
37 #include "avfilter.h"
38 #include "formats.h"
39 #include "internal.h"
40 #include "af_volume.h"
41 
42 static const char * const precision_str[] = {
43  "fixed", "float", "double"
44 };
45 
46 static const char *const var_names[] = {
47  "n", ///< frame number (starting at zero)
48  "nb_channels", ///< number of channels
49  "nb_consumed_samples", ///< number of samples consumed by the filter
50  "nb_samples", ///< number of samples in the current frame
51  "pos", ///< position in the file of the frame
52  "pts", ///< frame presentation timestamp
53  "sample_rate", ///< sample rate
54  "startpts", ///< PTS at start of stream
55  "startt", ///< time at start of stream
56  "t", ///< time in the file of the frame
57  "tb", ///< timebase
58  "volume", ///< last set value
59  NULL
60 };
61 
62 #define OFFSET(x) offsetof(VolumeContext, x)
63 #define A AV_OPT_FLAG_AUDIO_PARAM
64 #define F AV_OPT_FLAG_FILTERING_PARAM
65 
66 static const AVOption volume_options[] = {
67  { "volume", "set volume adjustment expression",
68  OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A|F },
69  { "precision", "select mathematical precision",
70  OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, "precision" },
71  { "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A|F, "precision" },
72  { "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A|F, "precision" },
73  { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, "precision" },
74  { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_ONCE}, 0, EVAL_MODE_NB-1, .flags = A|F, "eval" },
75  { "once", "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE}, .flags = A|F, .unit = "eval" },
76  { "frame", "eval volume expression per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A|F, .unit = "eval" },
77  { "replaygain", "Apply replaygain side data when present",
78  OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A|F, "replaygain" },
79  { "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A|F, "replaygain" },
80  { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A|F, "replaygain" },
81  { "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A|F, "replaygain" },
82  { "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A|F, "replaygain" },
83  { "replaygain_preamp", "Apply replaygain pre-amplification",
84  OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A|F },
85  { "replaygain_noclip", "Apply replaygain clipping prevention",
86  OFFSET(replaygain_noclip), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, A|F },
87  { NULL }
88 };
89 
90 AVFILTER_DEFINE_CLASS(volume);
91 
92 static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
93 {
94  int ret;
95  AVExpr *old = NULL;
96 
97  if (*pexpr)
98  old = *pexpr;
99  ret = av_expr_parse(pexpr, expr, var_names,
100  NULL, NULL, NULL, NULL, 0, log_ctx);
101  if (ret < 0) {
102  av_log(log_ctx, AV_LOG_ERROR,
103  "Error when evaluating the volume expression '%s'\n", expr);
104  *pexpr = old;
105  return ret;
106  }
107 
108  av_expr_free(old);
109  return 0;
110 }
111 
112 static av_cold int init(AVFilterContext *ctx)
113 {
114  VolumeContext *vol = ctx->priv;
115 
116  vol->fdsp = avpriv_float_dsp_alloc(0);
117  if (!vol->fdsp)
118  return AVERROR(ENOMEM);
119 
120  return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
121 }
122 
123 static av_cold void uninit(AVFilterContext *ctx)
124 {
125  VolumeContext *vol = ctx->priv;
126  av_expr_free(vol->volume_pexpr);
127  av_opt_free(vol);
128  av_freep(&vol->fdsp);
129 }
130 
131 static int query_formats(AVFilterContext *ctx)
132 {
133  VolumeContext *vol = ctx->priv;
134  AVFilterFormats *formats = NULL;
135  AVFilterChannelLayouts *layouts;
136  static const enum AVSampleFormat sample_fmts[][7] = {
137  [PRECISION_FIXED] = {
138  AV_SAMPLE_FMT_U8,
139  AV_SAMPLE_FMT_U8P,
140  AV_SAMPLE_FMT_S16,
141  AV_SAMPLE_FMT_S16P,
142  AV_SAMPLE_FMT_S32,
143  AV_SAMPLE_FMT_S32P,
144  AV_SAMPLE_FMT_NONE
145  },
146  [PRECISION_FLOAT] = {
147  AV_SAMPLE_FMT_FLT,
148  AV_SAMPLE_FMT_FLTP,
149  AV_SAMPLE_FMT_NONE
150  },
151  [PRECISION_DOUBLE] = {
152  AV_SAMPLE_FMT_DBL,
153  AV_SAMPLE_FMT_DBLP,
154  AV_SAMPLE_FMT_NONE
155  }
156  };
157  int ret;
158 
159  layouts = ff_all_channel_counts();
160  if (!layouts)
161  return AVERROR(ENOMEM);
162  ret = ff_set_common_channel_layouts(ctx, layouts);
163  if (ret < 0)
164  return ret;
165 
166  formats = ff_make_format_list(sample_fmts[vol->precision]);
167  if (!formats)
168  return AVERROR(ENOMEM);
169  ret = ff_set_common_formats(ctx, formats);
170  if (ret < 0)
171  return ret;
172 
173  formats = ff_all_samplerates();
174  if (!formats)
175  return AVERROR(ENOMEM);
176  return ff_set_common_samplerates(ctx, formats);
177 }
178 
179 static inline void scale_samples_u8(uint8_t *dst, const uint8_t *src,
180  int nb_samples, int volume)
181 {
182  int i;
183  for (i = 0; i < nb_samples; i++)
184  dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
185 }
186 
187 static inline void scale_samples_u8_small(uint8_t *dst, const uint8_t *src,
188  int nb_samples, int volume)
189 {
190  int i;
191  for (i = 0; i < nb_samples; i++)
192  dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
193 }
194 
195 static inline void scale_samples_s16(uint8_t *dst, const uint8_t *src,
196  int nb_samples, int volume)
197 {
198  int i;
199  int16_t *smp_dst = (int16_t *)dst;
200  const int16_t *smp_src = (const int16_t *)src;
201  for (i = 0; i < nb_samples; i++)
202  smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
203 }
204 
205 static inline void scale_samples_s16_small(uint8_t *dst, const uint8_t *src,
206  int nb_samples, int volume)
207 {
208  int i;
209  int16_t *smp_dst = (int16_t *)dst;
210  const int16_t *smp_src = (const int16_t *)src;
211  for (i = 0; i < nb_samples; i++)
212  smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
213 }
214 
215 static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
216  int nb_samples, int volume)
217 {
218  int i;
219  int32_t *smp_dst = (int32_t *)dst;
220  const int32_t *smp_src = (const int32_t *)src;
221  for (i = 0; i < nb_samples; i++)
222  smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
223 }
224 
225 static av_cold void volume_init(VolumeContext *vol)
226 {
227  vol->samples_align = 1;
228 
229  switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
230  case AV_SAMPLE_FMT_U8:
231  if (vol->volume_i < 0x1000000)
232  vol->scale_samples = scale_samples_u8_small;
233  else
234  vol->scale_samples = scale_samples_u8;
235  break;
236  case AV_SAMPLE_FMT_S16:
237  if (vol->volume_i < 0x10000)
238  vol->scale_samples = scale_samples_s16_small;
239  else
240  vol->scale_samples = scale_samples_s16;
241  break;
242  case AV_SAMPLE_FMT_S32:
243  vol->scale_samples = scale_samples_s32;
244  break;
245  case AV_SAMPLE_FMT_FLT:
246  vol->samples_align = 4;
247  break;
248  case AV_SAMPLE_FMT_DBL:
249  vol->samples_align = 8;
250  break;
251  }
252 
253  if (ARCH_X86)
254  ff_volume_init_x86(vol);
255 }
256 
257 static int set_volume(AVFilterContext *ctx)
258 {
259  VolumeContext *vol = ctx->priv;
260 
261  vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
262  if (isnan(vol->volume)) {
263  if (vol->eval_mode == EVAL_MODE_ONCE) {
264  av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
265  return AVERROR(EINVAL);
266  } else {
267  av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
268  vol->volume = 0;
269  }
270  }
271  vol->var_values[VAR_VOLUME] = vol->volume;
272 
273  av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
274  vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
275  precision_str[vol->precision]);
276 
277  if (vol->precision == PRECISION_FIXED) {
278  vol->volume_i = (int)(vol->volume * 256 + 0.5);
279  vol->volume = vol->volume_i / 256.0;
280  av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
281  }
282  av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
283  vol->volume, 20.0*log10(vol->volume));
284 
285  volume_init(vol);
286  return 0;
287 }
288 
289 static int config_output(AVFilterLink *outlink)
290 {
291  AVFilterContext *ctx = outlink->src;
292  VolumeContext *vol = ctx->priv;
293  AVFilterLink *inlink = ctx->inputs[0];
294 
295  vol->sample_fmt = inlink->format;
296  vol->channels = inlink->channels;
297  vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
298 
299  vol->var_values[VAR_N] =
300  vol->var_values[VAR_NB_CONSUMED_SAMPLES] =
301  vol->var_values[VAR_NB_SAMPLES] =
302  vol->var_values[VAR_POS] =
303  vol->var_values[VAR_PTS] =
304  vol->var_values[VAR_STARTPTS] =
305  vol->var_values[VAR_STARTT] =
306  vol->var_values[VAR_T] =
307  vol->var_values[VAR_VOLUME] = NAN;
308 
309  vol->var_values[VAR_NB_CHANNELS] = inlink->channels;
310  vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
311  vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
312 
313  av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
314  vol->var_values[VAR_TB],
315  vol->var_values[VAR_SAMPLE_RATE],
316  vol->var_values[VAR_NB_CHANNELS]);
317 
318  return set_volume(ctx);
319 }
320 
321 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
322  char *res, int res_len, int flags)
323 {
324  VolumeContext *vol = ctx->priv;
325  int ret = AVERROR(ENOSYS);
326 
327  if (!strcmp(cmd, "volume")) {
328  if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
329  return ret;
330  if (vol->eval_mode == EVAL_MODE_ONCE)
331  set_volume(ctx);
332  }
333 
334  return ret;
335 }
336 
337 #define D2TS(d) (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
338 #define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
339 #define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))
340 
341 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
342 {
343  AVFilterContext *ctx = inlink->dst;
344  VolumeContext *vol = inlink->dst->priv;
345  AVFilterLink *outlink = inlink->dst->outputs[0];
346  int nb_samples = buf->nb_samples;
347  AVFrame *out_buf;
348  int64_t pos;
349  AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
350  int ret;
351 
352  if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
353  if (vol->replaygain != REPLAYGAIN_DROP) {
354  AVReplayGain *replaygain = (AVReplayGain*)sd->data;
355  int32_t gain = 100000;
356  uint32_t peak = 100000;
357  float g, p;
358 
359  if (vol->replaygain == REPLAYGAIN_TRACK &&
360  replaygain->track_gain != INT32_MIN) {
361  gain = replaygain->track_gain;
362 
363  if (replaygain->track_peak != 0)
364  peak = replaygain->track_peak;
365  } else if (replaygain->album_gain != INT32_MIN) {
366  gain = replaygain->album_gain;
367 
368  if (replaygain->album_peak != 0)
369  peak = replaygain->album_peak;
370  } else {
371  av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
372  "values are unknown.\n");
373  }
374  g = gain / 100000.0f;
375  p = peak / 100000.0f;
376 
377  av_log(inlink->dst, AV_LOG_VERBOSE,
378  "Using gain %f dB from replaygain side data.\n", g);
379 
380  vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20);
381  if (vol->replaygain_noclip)
382  vol->volume = FFMIN(vol->volume, 1.0 / p);
383  vol->volume_i = (int)(vol->volume * 256 + 0.5);
384 
385  volume_init(vol);
386  }
387  av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
388  }
389 
390  if (isnan(vol->var_values[VAR_STARTPTS])) {
391  vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
392  vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
393  }
394  vol->var_values[VAR_PTS] = TS2D(buf->pts);
395  vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
396  vol->var_values[VAR_N ] = inlink->frame_count_out;
397 
398  pos = buf->pkt_pos;
399  vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
400  if (vol->eval_mode == EVAL_MODE_FRAME)
401  set_volume(ctx);
402 
403  if (vol->volume == 1.0 || vol->volume_i == 256) {
404  out_buf = buf;
405  goto end;
406  }
407 
408  /* do volume scaling in-place if input buffer is writable */
409  if (av_frame_is_writable(buf)
410  && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) {
411  out_buf = buf;
412  } else {
413  out_buf = ff_get_audio_buffer(outlink, nb_samples);
414  if (!out_buf) {
415  av_frame_free(&buf);
416  return AVERROR(ENOMEM);
417  }
418  ret = av_frame_copy_props(out_buf, buf);
419  if (ret < 0) {
420  av_frame_free(&out_buf);
421  av_frame_free(&buf);
422  return ret;
423  }
424  }
425 
426  if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {
427  int p, plane_samples;
428 
429  if (av_sample_fmt_is_planar(buf->format))
430  plane_samples = FFALIGN(nb_samples, vol->samples_align);
431  else
432  plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);
433 
434  if (vol->precision == PRECISION_FIXED) {
435  for (p = 0; p < vol->planes; p++) {
436  vol->scale_samples(out_buf->extended_data[p],
437  buf->extended_data[p], plane_samples,
438  vol->volume_i);
439  }
440  } else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) {
441  for (p = 0; p < vol->planes; p++) {
442  vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
443  (const float *)buf->extended_data[p],
444  vol->volume, plane_samples);
445  }
446  } else {
447  for (p = 0; p < vol->planes; p++) {
448  vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
449  (const double *)buf->extended_data[p],
450  vol->volume, plane_samples);
451  }
452  }
453  }
454 
455  emms_c();
456 
457  if (buf != out_buf)
458  av_frame_free(&buf);
459 
460 end:
461  vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples;
462  return ff_filter_frame(outlink, out_buf);
463 }
464 
465 static const AVFilterPad avfilter_af_volume_inputs[] = {
466  {
467  .name = "default",
468  .type = AVMEDIA_TYPE_AUDIO,
469  .filter_frame = filter_frame,
470  },
471  { NULL }
472 };
473 
474 static const AVFilterPad avfilter_af_volume_outputs[] = {
475  {
476  .name = "default",
477  .type = AVMEDIA_TYPE_AUDIO,
478  .config_props = config_output,
479  },
480  { NULL }
481 };
482 
483 AVFilter ff_af_volume = {
484  .name = "volume",
485  .description = NULL_IF_CONFIG_SMALL("Change input volume."),
486  .query_formats = query_formats,
487  .priv_size = sizeof(VolumeContext),
488  .priv_class = &volume_class,
489  .init = init,
490  .uninit = uninit,
491  .inputs = avfilter_af_volume_inputs,
492  .outputs = avfilter_af_volume_outputs,
493  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
494  .process_command = process_command,
495 };
PRECISION_FIXED
@ PRECISION_FIXED
Definition: af_volume.h:34
OFFSET
#define OFFSET(x)
Definition: af_volume.c:62
formats
formats
Definition: signature.h:48
REPLAYGAIN_ALBUM
@ REPLAYGAIN_ALBUM
Definition: af_volume.h:65
af_volume.h
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_volume.c:112
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:86
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
TS2T
#define TS2T(ts, tb)
Definition: af_volume.c:339
ff_exp10
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
VolumeContext::planes
int planes
Definition: af_volume.h:83
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:734
VolumeContext
Definition: af_volume.h:68
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates.
Definition: formats.c:549
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:686
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
var_names
static const char *const var_names[]
Definition: af_volume.c:46
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: af_volume.c:341
VAR_NB_CONSUMED_SAMPLES
@ VAR_NB_CONSUMED_SAMPLES
Definition: af_volume.h:48
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
ff_all_channel_counts
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition.
Definition: formats.c:410
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption
AVOption.
Definition: opt.h:246
AVReplayGain::album_gain
int32_t album_gain
Same as track_gain, but for the whole album.
Definition: replaygain.h:43
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
VAR_POS
@ VAR_POS
Definition: af_volume.h:50
replaygain.h
REPLAYGAIN_DROP
@ REPLAYGAIN_DROP
Definition: af_volume.h:62
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_volume.c:123
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
av_expr_parse
int av_expr_parse(AVExpr **expr, const char *s, const char *const *const_names, const char *const *func1_names, double(*const *funcs1)(void *, double), const char *const *func2_names, double(*const *funcs2)(void *, double, double), int log_offset, void *log_ctx)
Parse an expression.
Definition: eval.c:679
VAR_T
@ VAR_T
Definition: aeval.c:51
VAR_TB
@ VAR_TB
Definition: af_volume.h:56
volume_init
static av_cold void volume_init(VolumeContext *vol)
Definition: af_volume.c:225
scale_samples_s32
static void scale_samples_s32(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:215
scale_samples_s16
static void scale_samples_s16(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:195
VolumeContext::volume_pexpr
AVExpr * volume_pexpr
Definition: af_volume.h:74
VolumeContext::replaygain_noclip
int replaygain_noclip
Definition: af_volume.h:79
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_volume.c:289
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(volume)
VAR_NB_CHANNELS
@ VAR_NB_CHANNELS
Definition: af_volume.h:47
VolumeContext::eval_mode
int eval_mode
Definition: af_volume.h:72
VolumeContext::channels
int channels
Definition: af_volume.h:82
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:334
src
#define src
Definition: vp8dsp.c:254
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_volume.c:131
buf
void * buf
Definition: avisynth_c.h:766
av_cold
#define av_cold
Definition: attributes.h:84
ff_set_common_formats
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
intreadwrite.h
g
const char * g
Definition: vf_curves.c:115
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:225
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
av_sample_fmt_is_planar
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
Definition: samplefmt.c:112
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
ctx
AVFormatContext * ctx
Definition: movenc.c:48
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:734
AVExpr
Definition: eval.c:157
PRECISION_DOUBLE
@ PRECISION_DOUBLE
Definition: af_volume.h:36
VAR_VOLUME
@ VAR_VOLUME
Definition: af_volume.h:57
set_volume
static int set_volume(AVFilterContext *ctx)
Definition: af_volume.c:257
AVReplayGain::track_peak
uint32_t track_peak
Peak track amplitude, with 100000 representing full scale (but values may overflow).
Definition: replaygain.h:39
NAN
#define NAN
Definition: mathematics.h:64
scale_samples_u8_small
static void scale_samples_u8_small(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:187
scale_samples_u8
static void scale_samples_u8(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:179
int32_t
int32_t
Definition: audio_convert.c:194
VolumeContext::volume_expr
const char * volume_expr
Definition: af_volume.h:73
if
if(ret)
Definition: filter_design.txt:179
NULL
#define NULL
Definition: coverity.c:32
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
AVFloatDSPContext::vector_fmul_scalar
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:85
isnan
#define isnan(x)
Definition: libm.h:340
TS2D
#define TS2D(ts)
Definition: af_volume.c:338
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_volume.c:321
av_opt_free
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1558
inputs
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
Definition: filter_design.txt:243
AV_SAMPLE_FMT_U8
AV_SAMPLE_FMT_U8
Definition: audio_convert.c:194
VolumeContext::var_values
double var_values[VAR_VARS_NB]
Definition: af_volume.h:75
VolumeContext::volume_i
int volume_i
Definition: af_volume.h:81
float_dsp.h
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: af_afftfilt.c:57
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition: af_volume.h:78
eval.h
AV_FRAME_DATA_REPLAYGAIN
@ AV_FRAME_DATA_REPLAYGAIN
ReplayGain information in the form of the AVReplayGain struct.
Definition: frame.h:76
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:188
AV_SAMPLE_FMT_U8P
@ AV_SAMPLE_FMT_U8P
unsigned 8 bits, planar
Definition: samplefmt.h:66
VolumeContext::replaygain
int replaygain
Definition: af_volume.h:77
REPLAYGAIN_IGNORE
@ REPLAYGAIN_IGNORE
Definition: af_volume.h:63
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
VAR_NB_SAMPLES
@ VAR_NB_SAMPLES
Definition: af_volume.h:49
F
#define F
Definition: af_volume.c:64
AVFrameSideData::data
uint8_t * data
Definition: frame.h:203
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
scale_samples_s16_small
static void scale_samples_s16_small(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:205
AVReplayGain::track_gain
int32_t track_gain
Track replay gain in microbels (divide by 100000 to get the value in dB).
Definition: replaygain.h:34
precision_str
static const char *const precision_str[]
Definition: af_volume.c:42
av_frame_remove_side_data
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
If side data of the supplied type exists in the frame, free it and remove it from the frame.
Definition: frame.c:805
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
VolumeContext::samples_align
int samples_align
Definition: af_volume.h:88
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:86
VolumeContext::volume
double volume
Definition: af_volume.h:80
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:361
avfilter_af_volume_outputs
static const AVFilterPad avfilter_af_volume_outputs[]
Definition: af_volume.c:474
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
VAR_STARTT
@ VAR_STARTT
Definition: af_volume.h:54
set_expr
static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
Definition: af_volume.c:92
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:342
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
args
const char AVS_Value args
Definition: avisynth_c.h:873
uint8_t
uint8_t
Definition: audio_convert.c:194
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:61
VAR_PTS
@ VAR_PTS
Definition: af_afftfilt.c:57
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilter
Filter definition.
Definition: avfilter.h:144
EVAL_MODE_ONCE
@ EVAL_MODE_ONCE
Definition: af_volume.h:40
ret
ret
Definition: filter_design.txt:187
volume_options
static const AVOption volume_options[]
Definition: af_volume.c:66
AVFloatDSPContext::vector_dmul_scalar
void(* vector_dmul_scalar)(double *dst, const double *src, double mul, int len)
Multiply a vector of double by a scalar double.
Definition: float_dsp.h:100
EVAL_MODE_NB
@ EVAL_MODE_NB
Definition: af_volume.h:42
VAR_STARTPTS
@ VAR_STARTPTS
Definition: af_volume.h:53
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
channel_layout.h
EVAL_MODE_FRAME
@ EVAL_MODE_FRAME
Definition: af_volume.h:41
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:223
avfilter.h
VolumeContext::precision
int precision
Definition: af_volume.h:71
ff_volume_init_x86
void ff_volume_init_x86(VolumeContext *vol)
Definition: af_volume_init.c:36
AVReplayGain::album_peak
uint32_t album_peak
Same as track_peak, but for the whole album,.
Definition: replaygain.h:47
VolumeContext::fdsp
AVFloatDSPContext * fdsp
Definition: af_volume.h:70
av_get_packed_sample_fmt
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
Definition: samplefmt.c:75
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:70
ffmath.h
VAR_N
@ VAR_N
Definition: aeval.c:48
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
AVReplayGain
ReplayGain information (see http://wiki.hydrogenaudio.org/index.php?title=ReplayGain_1....
Definition: replaygain.h:29
VolumeContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition: af_volume.h:84
audio.h
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:201
PRECISION_FLOAT
@ PRECISION_FLOAT
Definition: af_volume.h:35
A
#define A
Definition: af_volume.c:63
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:48
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:240
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
avpriv_float_dsp_alloc
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
avfilter_af_volume_inputs
static const AVFilterPad avfilter_af_volume_inputs[]
Definition: af_volume.c:465
ff_set_common_samplerates
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
AV_SAMPLE_FMT_DBL
@ AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:64
ff_af_volume
AVFilter ff_af_volume
Definition: af_volume.c:483
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:227
int
int
Definition: ffmpeg_filter.c:191
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:62
REPLAYGAIN_TRACK
@ REPLAYGAIN_TRACK
Definition: af_volume.h:64
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:232
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:63
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