FFmpeg
af_volume.c
Go to the documentation of this file.
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 #if FF_API_FRAME_PKT
52  "pos", ///< position in the file of the frame
53 #endif
54  "pts", ///< frame presentation timestamp
55  "sample_rate", ///< sample rate
56  "startpts", ///< PTS at start of stream
57  "startt", ///< time at start of stream
58  "t", ///< time in the file of the frame
59  "tb", ///< timebase
60  "volume", ///< last set value
61  NULL
62 };
63 
64 #define OFFSET(x) offsetof(VolumeContext, x)
65 #define A AV_OPT_FLAG_AUDIO_PARAM
66 #define F AV_OPT_FLAG_FILTERING_PARAM
67 #define T AV_OPT_FLAG_RUNTIME_PARAM
68 
69 static const AVOption volume_options[] = {
70  { "volume", "set volume adjustment expression",
71  OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A|F|T },
72  { "precision", "select mathematical precision",
73  OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, "precision" },
74  { "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A|F, "precision" },
75  { "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A|F, "precision" },
76  { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, "precision" },
77  { "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" },
78  { "once", "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE}, .flags = A|F, .unit = "eval" },
79  { "frame", "eval volume expression per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A|F, .unit = "eval" },
80  { "replaygain", "Apply replaygain side data when present",
81  OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A|F, "replaygain" },
82  { "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A|F, "replaygain" },
83  { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A|F, "replaygain" },
84  { "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A|F, "replaygain" },
85  { "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A|F, "replaygain" },
86  { "replaygain_preamp", "Apply replaygain pre-amplification",
87  OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A|F },
88  { "replaygain_noclip", "Apply replaygain clipping prevention",
89  OFFSET(replaygain_noclip), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, A|F },
90  { NULL }
91 };
92 
93 AVFILTER_DEFINE_CLASS(volume);
94 
95 static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
96 {
97  int ret;
98  AVExpr *old = NULL;
99 
100  if (*pexpr)
101  old = *pexpr;
102  ret = av_expr_parse(pexpr, expr, var_names,
103  NULL, NULL, NULL, NULL, 0, log_ctx);
104  if (ret < 0) {
105  av_log(log_ctx, AV_LOG_ERROR,
106  "Error when evaluating the volume expression '%s'\n", expr);
107  *pexpr = old;
108  return ret;
109  }
110 
111  av_expr_free(old);
112  return 0;
113 }
114 
115 static av_cold int init(AVFilterContext *ctx)
116 {
117  VolumeContext *vol = ctx->priv;
118 
119  vol->fdsp = avpriv_float_dsp_alloc(0);
120  if (!vol->fdsp)
121  return AVERROR(ENOMEM);
122 
123  return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
124 }
125 
126 static av_cold void uninit(AVFilterContext *ctx)
127 {
128  VolumeContext *vol = ctx->priv;
129  av_expr_free(vol->volume_pexpr);
130  av_opt_free(vol);
131  av_freep(&vol->fdsp);
132 }
133 
134 static int query_formats(AVFilterContext *ctx)
135 {
136  VolumeContext *vol = ctx->priv;
137  static const enum AVSampleFormat sample_fmts[][7] = {
138  [PRECISION_FIXED] = {
139  AV_SAMPLE_FMT_U8,
140  AV_SAMPLE_FMT_U8P,
141  AV_SAMPLE_FMT_S16,
142  AV_SAMPLE_FMT_S16P,
143  AV_SAMPLE_FMT_S32,
144  AV_SAMPLE_FMT_S32P,
145  AV_SAMPLE_FMT_NONE
146  },
147  [PRECISION_FLOAT] = {
148  AV_SAMPLE_FMT_FLT,
149  AV_SAMPLE_FMT_FLTP,
150  AV_SAMPLE_FMT_NONE
151  },
152  [PRECISION_DOUBLE] = {
153  AV_SAMPLE_FMT_DBL,
154  AV_SAMPLE_FMT_DBLP,
155  AV_SAMPLE_FMT_NONE
156  }
157  };
158  int ret = ff_set_common_all_channel_counts(ctx);
159  if (ret < 0)
160  return ret;
161 
162  ret = ff_set_common_formats_from_list(ctx, sample_fmts[vol->precision]);
163  if (ret < 0)
164  return ret;
165 
166  return ff_set_common_all_samplerates(ctx);
167 }
168 
169 static inline void scale_samples_u8(uint8_t *dst, const uint8_t *src,
170  int nb_samples, int volume)
171 {
172  int i;
173  for (i = 0; i < nb_samples; i++)
174  dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
175 }
176 
177 static inline void scale_samples_u8_small(uint8_t *dst, const uint8_t *src,
178  int nb_samples, int volume)
179 {
180  int i;
181  for (i = 0; i < nb_samples; i++)
182  dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
183 }
184 
185 static inline void scale_samples_s16(uint8_t *dst, const uint8_t *src,
186  int nb_samples, int volume)
187 {
188  int i;
189  int16_t *smp_dst = (int16_t *)dst;
190  const int16_t *smp_src = (const int16_t *)src;
191  for (i = 0; i < nb_samples; i++)
192  smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
193 }
194 
195 static inline void scale_samples_s16_small(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((smp_src[i] * volume + 128) >> 8);
203 }
204 
205 static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
206  int nb_samples, int volume)
207 {
208  int i;
209  int32_t *smp_dst = (int32_t *)dst;
210  const int32_t *smp_src = (const int32_t *)src;
211  for (i = 0; i < nb_samples; i++)
212  smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
213 }
214 
215 static av_cold void volume_init(VolumeContext *vol)
216 {
217  vol->samples_align = 1;
218 
219  switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
220  case AV_SAMPLE_FMT_U8:
221  if (vol->volume_i < 0x1000000)
222  vol->scale_samples = scale_samples_u8_small;
223  else
224  vol->scale_samples = scale_samples_u8;
225  break;
226  case AV_SAMPLE_FMT_S16:
227  if (vol->volume_i < 0x10000)
228  vol->scale_samples = scale_samples_s16_small;
229  else
230  vol->scale_samples = scale_samples_s16;
231  break;
232  case AV_SAMPLE_FMT_S32:
233  vol->scale_samples = scale_samples_s32;
234  break;
235  case AV_SAMPLE_FMT_FLT:
236  vol->samples_align = 4;
237  break;
238  case AV_SAMPLE_FMT_DBL:
239  vol->samples_align = 8;
240  break;
241  }
242 
243 #if ARCH_X86
244  ff_volume_init_x86(vol);
245 #endif
246 }
247 
248 static int set_volume(AVFilterContext *ctx)
249 {
250  VolumeContext *vol = ctx->priv;
251 
252  vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
253  if (isnan(vol->volume)) {
254  if (vol->eval_mode == EVAL_MODE_ONCE) {
255  av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
256  return AVERROR(EINVAL);
257  } else {
258  av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
259  vol->volume = 0;
260  }
261  }
262  vol->var_values[VAR_VOLUME] = vol->volume;
263 
264  av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
265  vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
266  precision_str[vol->precision]);
267 
268  if (vol->precision == PRECISION_FIXED) {
269  vol->volume_i = (int)(vol->volume * 256 + 0.5);
270  vol->volume = vol->volume_i / 256.0;
271  av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
272  }
273  av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
274  vol->volume, 20.0*log10(vol->volume));
275 
276  volume_init(vol);
277  return 0;
278 }
279 
280 static int config_output(AVFilterLink *outlink)
281 {
282  AVFilterContext *ctx = outlink->src;
283  VolumeContext *vol = ctx->priv;
284  AVFilterLink *inlink = ctx->inputs[0];
285 
286  vol->sample_fmt = inlink->format;
287  vol->channels = inlink->ch_layout.nb_channels;
288  vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
289 
290  vol->var_values[VAR_N] =
291  vol->var_values[VAR_NB_CONSUMED_SAMPLES] =
292  vol->var_values[VAR_NB_SAMPLES] =
293 #if FF_API_FRAME_PKT
294  vol->var_values[VAR_POS] =
295 #endif
296  vol->var_values[VAR_PTS] =
297  vol->var_values[VAR_STARTPTS] =
298  vol->var_values[VAR_STARTT] =
299  vol->var_values[VAR_T] =
300  vol->var_values[VAR_VOLUME] = NAN;
301 
302  vol->var_values[VAR_NB_CHANNELS] = inlink->ch_layout.nb_channels;
303  vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
304  vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
305 
306  av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
307  vol->var_values[VAR_TB],
308  vol->var_values[VAR_SAMPLE_RATE],
309  vol->var_values[VAR_NB_CHANNELS]);
310 
311  return set_volume(ctx);
312 }
313 
314 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
315  char *res, int res_len, int flags)
316 {
317  VolumeContext *vol = ctx->priv;
318  int ret = AVERROR(ENOSYS);
319 
320  if (!strcmp(cmd, "volume")) {
321  if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
322  return ret;
323  if (vol->eval_mode == EVAL_MODE_ONCE)
324  set_volume(ctx);
325  }
326 
327  return ret;
328 }
329 
330 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
331 {
332  AVFilterContext *ctx = inlink->dst;
333  VolumeContext *vol = inlink->dst->priv;
334  AVFilterLink *outlink = inlink->dst->outputs[0];
335  int nb_samples = buf->nb_samples;
336  AVFrame *out_buf;
337  AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
338  int ret;
339 
340  if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
341  if (vol->replaygain != REPLAYGAIN_DROP) {
342  AVReplayGain *replaygain = (AVReplayGain*)sd->data;
343  int32_t gain = 100000;
344  uint32_t peak = 100000;
345  float g, p;
346 
347  if (vol->replaygain == REPLAYGAIN_TRACK &&
348  replaygain->track_gain != INT32_MIN) {
349  gain = replaygain->track_gain;
350 
351  if (replaygain->track_peak != 0)
352  peak = replaygain->track_peak;
353  } else if (replaygain->album_gain != INT32_MIN) {
354  gain = replaygain->album_gain;
355 
356  if (replaygain->album_peak != 0)
357  peak = replaygain->album_peak;
358  } else {
359  av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
360  "values are unknown.\n");
361  }
362  g = gain / 100000.0f;
363  p = peak / 100000.0f;
364 
365  av_log(inlink->dst, AV_LOG_VERBOSE,
366  "Using gain %f dB from replaygain side data.\n", g);
367 
368  vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20);
369  if (vol->replaygain_noclip)
370  vol->volume = FFMIN(vol->volume, 1.0 / p);
371  vol->volume_i = (int)(vol->volume * 256 + 0.5);
372 
373  volume_init(vol);
374  }
375  av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
376  }
377 
378  if (isnan(vol->var_values[VAR_STARTPTS])) {
379  vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
380  vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
381  }
382  vol->var_values[VAR_PTS] = TS2D(buf->pts);
383  vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
384  vol->var_values[VAR_N ] = inlink->frame_count_out;
385 
386 #if FF_API_FRAME_PKT
387 FF_DISABLE_DEPRECATION_WARNINGS
388  {
389  int64_t pos;
390  pos = buf->pkt_pos;
391  vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
392  }
393 FF_ENABLE_DEPRECATION_WARNINGS
394 #endif
395  if (vol->eval_mode == EVAL_MODE_FRAME)
396  set_volume(ctx);
397 
398  if (vol->volume == 1.0 || vol->volume_i == 256) {
399  out_buf = buf;
400  goto end;
401  }
402 
403  /* do volume scaling in-place if input buffer is writable */
404  if (av_frame_is_writable(buf)
405  && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) {
406  out_buf = buf;
407  } else {
408  out_buf = ff_get_audio_buffer(outlink, nb_samples);
409  if (!out_buf) {
410  av_frame_free(&buf);
411  return AVERROR(ENOMEM);
412  }
413  ret = av_frame_copy_props(out_buf, buf);
414  if (ret < 0) {
415  av_frame_free(&out_buf);
416  av_frame_free(&buf);
417  return ret;
418  }
419  }
420 
421  if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {
422  int p, plane_samples;
423 
424  if (av_sample_fmt_is_planar(buf->format))
425  plane_samples = FFALIGN(nb_samples, vol->samples_align);
426  else
427  plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);
428 
429  if (vol->precision == PRECISION_FIXED) {
430  for (p = 0; p < vol->planes; p++) {
431  vol->scale_samples(out_buf->extended_data[p],
432  buf->extended_data[p], plane_samples,
433  vol->volume_i);
434  }
435  } else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) {
436  for (p = 0; p < vol->planes; p++) {
437  vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
438  (const float *)buf->extended_data[p],
439  vol->volume, plane_samples);
440  }
441  } else {
442  for (p = 0; p < vol->planes; p++) {
443  vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
444  (const double *)buf->extended_data[p],
445  vol->volume, plane_samples);
446  }
447  }
448  }
449 
450  if (buf != out_buf)
451  av_frame_free(&buf);
452 
453 end:
454  vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples;
455  return ff_filter_frame(outlink, out_buf);
456 }
457 
458 static const AVFilterPad avfilter_af_volume_inputs[] = {
459  {
460  .name = "default",
461  .type = AVMEDIA_TYPE_AUDIO,
462  .filter_frame = filter_frame,
463  },
464 };
465 
466 static const AVFilterPad avfilter_af_volume_outputs[] = {
467  {
468  .name = "default",
469  .type = AVMEDIA_TYPE_AUDIO,
470  .config_props = config_output,
471  },
472 };
473 
474 const AVFilter ff_af_volume = {
475  .name = "volume",
476  .description = NULL_IF_CONFIG_SMALL("Change input volume."),
477  .priv_size = sizeof(VolumeContext),
478  .priv_class = &volume_class,
479  .init = init,
480  .uninit = uninit,
481  FILTER_INPUTS(avfilter_af_volume_inputs),
482  FILTER_OUTPUTS(avfilter_af_volume_outputs),
483  FILTER_QUERY_FUNC(query_formats),
484  .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
485  .process_command = process_command,
486 };
PRECISION_FIXED
@ PRECISION_FIXED
Definition: af_volume.h:34
OFFSET
#define OFFSET(x)
Definition: af_volume.c:64
REPLAYGAIN_ALBUM
@ REPLAYGAIN_ALBUM
Definition: af_volume.h:67
af_volume.h
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_volume.c:115
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:107
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:66
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
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
VolumeContext::planes
int planes
Definition: af_volume.h:85
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:824
VolumeContext
Definition: af_volume.h:70
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:947
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:330
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:100
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
AVOption
AVOption.
Definition: opt.h:251
AVReplayGain::album_gain
int32_t album_gain
Same as track_gain, but for the whole album.
Definition: replaygain.h:43
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:169
AV_SAMPLE_FMT_S32P
@ AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:65
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
ff_set_common_all_samplerates
int ff_set_common_all_samplerates(AVFilterContext *ctx)
Equivalent to ff_set_common_samplerates(ctx, ff_all_samplerates())
Definition: formats.c:760
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
replaygain.h
REPLAYGAIN_DROP
@ REPLAYGAIN_DROP
Definition: af_volume.h:64
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_volume.c:126
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:685
VAR_T
@ VAR_T
Definition: aeval.c:54
volume_init
static av_cold void volume_init(VolumeContext *vol)
Definition: af_volume.c:215
scale_samples_s32
static void scale_samples_s32(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:205
scale_samples_s16
static void scale_samples_s16(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:185
VolumeContext::volume_pexpr
AVExpr * volume_pexpr
Definition: af_volume.h:76
VolumeContext::replaygain_noclip
int replaygain_noclip
Definition: af_volume.h:81
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_volume.c:280
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(volume)
VolumeContext::eval_mode
int eval_mode
Definition: af_volume.h:74
VolumeContext::channels
int channels
Definition: af_volume.h:84
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:336
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:47
TS2T
#define TS2T(ts, tb)
Definition: internal.h:255
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_volume.c:134
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
g
const char * g
Definition: vf_curves.c:127
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
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
ff_set_common_formats_from_list
int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts)
Equivalent to ff_set_common_formats(ctx, ff_make_format_list(fmts))
Definition: formats.c:776
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:114
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:766
AVExpr
Definition: eval.c:157
PRECISION_DOUBLE
@ PRECISION_DOUBLE
Definition: af_volume.h:36
VAR_VOLUME
@ VAR_VOLUME
Definition: af_volume.h:59
set_volume
static int set_volume(AVFilterContext *ctx)
Definition: af_volume.c:248
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:115
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:192
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:177
scale_samples_u8
static void scale_samples_u8(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:169
VolumeContext::volume_expr
const char * volume_expr
Definition: af_volume.h:75
if
if(ret)
Definition: filter_design.txt:179
av_clip_int16
#define av_clip_int16
Definition: common.h:111
TS2D
#define TS2D(ts)
Definition: internal.h:254
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:736
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
ff_af_volume
const AVFilter ff_af_volume
Definition: af_volume.c:474
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:314
VAR_POS
@ VAR_POS
Definition: noise_bsf.c:55
av_opt_free
void av_opt_free(void *obj)
Free all allocated objects in obj.
Definition: opt.c:1719
ff_set_common_all_channel_counts
int ff_set_common_all_channel_counts(AVFilterContext *ctx)
Equivalent to ff_set_common_channel_layouts(ctx, ff_all_channel_counts())
Definition: formats.c:742
VolumeContext::var_values
double var_values[VAR_VARS_NB]
Definition: af_volume.h:77
VolumeContext::volume_i
int volume_i
Definition: af_volume.h:83
float_dsp.h
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition: af_volume.h:80
VAR_PTS
@ VAR_PTS
Definition: noise_bsf.c:49
eval.h
AV_FRAME_DATA_REPLAYGAIN
@ AV_FRAME_DATA_REPLAYGAIN
ReplayGain information in the form of the AVReplayGain struct.
Definition: frame.h:77
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:106
VAR_N
@ VAR_N
Definition: noise_bsf.c:47
AV_SAMPLE_FMT_U8P
@ AV_SAMPLE_FMT_U8P
unsigned 8 bits, planar
Definition: samplefmt.h:63
av_clipl_int32
#define av_clipl_int32
Definition: common.h:114
VolumeContext::replaygain
int replaygain
Definition: af_volume.h:79
REPLAYGAIN_IGNORE
@ REPLAYGAIN_IGNORE
Definition: af_volume.h:65
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
VAR_NB_SAMPLES
@ VAR_NB_SAMPLES
Definition: af_volume.h:49
F
#define F
Definition: af_volume.c:66
AVFrameSideData::data
uint8_t * data
Definition: frame.h:248
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:666
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:195
AVFrame::pkt_pos
attribute_deprecated int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:687
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
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
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)
Remove and free all side data instances of the given type.
Definition: frame.c:919
VolumeContext::samples_align
int samples_align
Definition: af_volume.h:90
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:88
VolumeContext::volume
double volume
Definition: af_volume.h:82
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:64
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:147
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:420
avfilter_af_volume_outputs
static const AVFilterPad avfilter_af_volume_outputs[]
Definition: af_volume.c:466
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
VAR_STARTT
@ VAR_STARTT
Definition: af_volume.h:56
AV_SAMPLE_FMT_U8
@ AV_SAMPLE_FMT_U8
unsigned 8 bits
Definition: samplefmt.h:57
set_expr
static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
Definition: af_volume.c:95
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:401
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_SAMPLE_FMT_S16
@ AV_SAMPLE_FMT_S16
signed 16 bits
Definition: samplefmt.h:58
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:53
VAR_NB_CHANNELS
@ VAR_NB_CHANNELS
Definition: af_adrc.c:46
AVFilter
Filter definition.
Definition: avfilter.h:166
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:69
pos
unsigned int pos
Definition: spdifenc.c:413
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
T
#define T
Definition: af_volume.c:67
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:225
avfilter.h
VolumeContext::precision
int precision
Definition: af_volume.h:73
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:72
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:77
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:67
ffmath.h
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: af_afftfilt.c:57
av_clip_uint8
#define av_clip_uint8
Definition: common.h:102
AVFilterContext
An instance of a filter.
Definition: avfilter.h:397
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
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:86
audio.h
VAR_TB
@ VAR_TB
Definition: noise_bsf.c:48
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:246
PRECISION_FLOAT
@ PRECISION_FLOAT
Definition: af_volume.h:35
A
#define A
Definition: af_volume.c:65
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:193
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
avpriv_float_dsp_alloc
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
avfilter_af_volume_inputs
static const AVFilterPad avfilter_af_volume_inputs[]
Definition: af_volume.c:458
AV_SAMPLE_FMT_DBL
@ AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:61
VAR_STARTPTS
@ VAR_STARTPTS
Definition: noise_bsf.c:52
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
int
int
Definition: ffmpeg_filter.c:368
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:59
REPLAYGAIN_TRACK
@ REPLAYGAIN_TRACK
Definition: af_volume.h:66
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60
Generated on Thu Apr 18 2024 22:42:20 for FFmpeg by   doxygen 1.8.17