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 
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 #define T AV_OPT_FLAG_RUNTIME_PARAM
66 
67 static const AVOption volume_options[] = {
68  { "volume", "set volume adjustment expression",
69  OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A|F|T },
70  { "precision", "select mathematical precision",
71  OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, "precision" },
72  { "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A|F, "precision" },
73  { "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A|F, "precision" },
74  { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, "precision" },
75  { "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" },
76  { "once", "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE}, .flags = A|F, .unit = "eval" },
77  { "frame", "eval volume expression per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A|F, .unit = "eval" },
78  { "replaygain", "Apply replaygain side data when present",
79  OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A|F, "replaygain" },
80  { "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A|F, "replaygain" },
81  { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A|F, "replaygain" },
82  { "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A|F, "replaygain" },
83  { "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A|F, "replaygain" },
84  { "replaygain_preamp", "Apply replaygain pre-amplification",
85  OFFSET(replaygain_preamp), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, -15.0, 15.0, A|F },
86  { "replaygain_noclip", "Apply replaygain clipping prevention",
87  OFFSET(replaygain_noclip), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, A|F },
88  { NULL }
89 };
90 
91 AVFILTER_DEFINE_CLASS(volume);
92 
93 static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
94 {
95  int ret;
96  AVExpr *old = NULL;
97 
98  if (*pexpr)
99  old = *pexpr;
100  ret = av_expr_parse(pexpr, expr, var_names,
101  NULL, NULL, NULL, NULL, 0, log_ctx);
102  if (ret < 0) {
103  av_log(log_ctx, AV_LOG_ERROR,
104  "Error when evaluating the volume expression '%s'\n", expr);
105  *pexpr = old;
106  return ret;
107  }
108 
109  av_expr_free(old);
110  return 0;
111 }
112 
114 {
115  VolumeContext *vol = ctx->priv;
116 
117  vol->fdsp = avpriv_float_dsp_alloc(0);
118  if (!vol->fdsp)
119  return AVERROR(ENOMEM);
120 
121  return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
122 }
123 
125 {
126  VolumeContext *vol = ctx->priv;
128  av_opt_free(vol);
129  av_freep(&vol->fdsp);
130 }
131 
133 {
134  VolumeContext *vol = ctx->priv;
135  static const enum AVSampleFormat sample_fmts[][7] = {
136  [PRECISION_FIXED] = {
144  },
145  [PRECISION_FLOAT] = {
149  },
150  [PRECISION_DOUBLE] = {
154  }
155  };
157  if (ret < 0)
158  return ret;
159 
161  if (ret < 0)
162  return ret;
163 
165 }
166 
167 static inline void scale_samples_u8(uint8_t *dst, const uint8_t *src,
168  int nb_samples, int volume)
169 {
170  int i;
171  for (i = 0; i < nb_samples; i++)
172  dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
173 }
174 
175 static inline void scale_samples_u8_small(uint8_t *dst, const uint8_t *src,
176  int nb_samples, int volume)
177 {
178  int i;
179  for (i = 0; i < nb_samples; i++)
180  dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
181 }
182 
183 static inline void scale_samples_s16(uint8_t *dst, const uint8_t *src,
184  int nb_samples, int volume)
185 {
186  int i;
187  int16_t *smp_dst = (int16_t *)dst;
188  const int16_t *smp_src = (const int16_t *)src;
189  for (i = 0; i < nb_samples; i++)
190  smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
191 }
192 
193 static inline void scale_samples_s16_small(uint8_t *dst, const uint8_t *src,
194  int nb_samples, int volume)
195 {
196  int i;
197  int16_t *smp_dst = (int16_t *)dst;
198  const int16_t *smp_src = (const int16_t *)src;
199  for (i = 0; i < nb_samples; i++)
200  smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
201 }
202 
203 static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
204  int nb_samples, int volume)
205 {
206  int i;
207  int32_t *smp_dst = (int32_t *)dst;
208  const int32_t *smp_src = (const int32_t *)src;
209  for (i = 0; i < nb_samples; i++)
210  smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
211 }
212 
214 {
215  vol->samples_align = 1;
216 
217  switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
218  case AV_SAMPLE_FMT_U8:
219  if (vol->volume_i < 0x1000000)
221  else
223  break;
224  case AV_SAMPLE_FMT_S16:
225  if (vol->volume_i < 0x10000)
227  else
229  break;
230  case AV_SAMPLE_FMT_S32:
232  break;
233  case AV_SAMPLE_FMT_FLT:
234  vol->samples_align = 4;
235  break;
236  case AV_SAMPLE_FMT_DBL:
237  vol->samples_align = 8;
238  break;
239  }
240 
241 #if ARCH_X86
242  ff_volume_init_x86(vol);
243 #endif
244 }
245 
247 {
248  VolumeContext *vol = ctx->priv;
249 
250  vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
251  if (isnan(vol->volume)) {
252  if (vol->eval_mode == EVAL_MODE_ONCE) {
253  av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
254  return AVERROR(EINVAL);
255  } else {
256  av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
257  vol->volume = 0;
258  }
259  }
260  vol->var_values[VAR_VOLUME] = vol->volume;
261 
262  av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
263  vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
264  precision_str[vol->precision]);
265 
266  if (vol->precision == PRECISION_FIXED) {
267  vol->volume_i = (int)(vol->volume * 256 + 0.5);
268  vol->volume = vol->volume_i / 256.0;
269  av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
270  }
271  av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
272  vol->volume, 20.0*log10(vol->volume));
273 
274  volume_init(vol);
275  return 0;
276 }
277 
278 static int config_output(AVFilterLink *outlink)
279 {
280  AVFilterContext *ctx = outlink->src;
281  VolumeContext *vol = ctx->priv;
282  AVFilterLink *inlink = ctx->inputs[0];
283 
284  vol->sample_fmt = inlink->format;
285  vol->channels = inlink->ch_layout.nb_channels;
286  vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
287 
288  vol->var_values[VAR_N] =
290  vol->var_values[VAR_NB_SAMPLES] =
291  vol->var_values[VAR_POS] =
292  vol->var_values[VAR_PTS] =
293  vol->var_values[VAR_STARTPTS] =
294  vol->var_values[VAR_STARTT] =
295  vol->var_values[VAR_T] =
296  vol->var_values[VAR_VOLUME] = NAN;
297 
298  vol->var_values[VAR_NB_CHANNELS] = inlink->ch_layout.nb_channels;
299  vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
300  vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
301 
302  av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
303  vol->var_values[VAR_TB],
306 
307  return set_volume(ctx);
308 }
309 
310 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
311  char *res, int res_len, int flags)
312 {
313  VolumeContext *vol = ctx->priv;
314  int ret = AVERROR(ENOSYS);
315 
316  if (!strcmp(cmd, "volume")) {
317  if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
318  return ret;
319  if (vol->eval_mode == EVAL_MODE_ONCE)
320  set_volume(ctx);
321  }
322 
323  return ret;
324 }
325 
327 {
328  AVFilterContext *ctx = inlink->dst;
329  VolumeContext *vol = inlink->dst->priv;
330  AVFilterLink *outlink = inlink->dst->outputs[0];
331  int nb_samples = buf->nb_samples;
332  AVFrame *out_buf;
333  int64_t pos;
335  int ret;
336 
337  if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
338  if (vol->replaygain != REPLAYGAIN_DROP) {
339  AVReplayGain *replaygain = (AVReplayGain*)sd->data;
340  int32_t gain = 100000;
341  uint32_t peak = 100000;
342  float g, p;
343 
344  if (vol->replaygain == REPLAYGAIN_TRACK &&
345  replaygain->track_gain != INT32_MIN) {
346  gain = replaygain->track_gain;
347 
348  if (replaygain->track_peak != 0)
349  peak = replaygain->track_peak;
350  } else if (replaygain->album_gain != INT32_MIN) {
351  gain = replaygain->album_gain;
352 
353  if (replaygain->album_peak != 0)
354  peak = replaygain->album_peak;
355  } else {
356  av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
357  "values are unknown.\n");
358  }
359  g = gain / 100000.0f;
360  p = peak / 100000.0f;
361 
363  "Using gain %f dB from replaygain side data.\n", g);
364 
365  vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20);
366  if (vol->replaygain_noclip)
367  vol->volume = FFMIN(vol->volume, 1.0 / p);
368  vol->volume_i = (int)(vol->volume * 256 + 0.5);
369 
370  volume_init(vol);
371  }
373  }
374 
375  if (isnan(vol->var_values[VAR_STARTPTS])) {
376  vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
377  vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
378  }
379  vol->var_values[VAR_PTS] = TS2D(buf->pts);
380  vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
381  vol->var_values[VAR_N ] = inlink->frame_count_out;
382 
383  pos = buf->pkt_pos;
384  vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
385  if (vol->eval_mode == EVAL_MODE_FRAME)
386  set_volume(ctx);
387 
388  if (vol->volume == 1.0 || vol->volume_i == 256) {
389  out_buf = buf;
390  goto end;
391  }
392 
393  /* do volume scaling in-place if input buffer is writable */
394  if (av_frame_is_writable(buf)
395  && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) {
396  out_buf = buf;
397  } else {
398  out_buf = ff_get_audio_buffer(outlink, nb_samples);
399  if (!out_buf) {
400  av_frame_free(&buf);
401  return AVERROR(ENOMEM);
402  }
403  ret = av_frame_copy_props(out_buf, buf);
404  if (ret < 0) {
405  av_frame_free(&out_buf);
406  av_frame_free(&buf);
407  return ret;
408  }
409  }
410 
411  if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {
412  int p, plane_samples;
413 
415  plane_samples = FFALIGN(nb_samples, vol->samples_align);
416  else
417  plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);
418 
419  if (vol->precision == PRECISION_FIXED) {
420  for (p = 0; p < vol->planes; p++) {
421  vol->scale_samples(out_buf->extended_data[p],
422  buf->extended_data[p], plane_samples,
423  vol->volume_i);
424  }
426  for (p = 0; p < vol->planes; p++) {
427  vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
428  (const float *)buf->extended_data[p],
429  vol->volume, plane_samples);
430  }
431  } else {
432  for (p = 0; p < vol->planes; p++) {
433  vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
434  (const double *)buf->extended_data[p],
435  vol->volume, plane_samples);
436  }
437  }
438  }
439 
440  emms_c();
441 
442  if (buf != out_buf)
443  av_frame_free(&buf);
444 
445 end:
447  return ff_filter_frame(outlink, out_buf);
448 }
449 
451  {
452  .name = "default",
453  .type = AVMEDIA_TYPE_AUDIO,
454  .filter_frame = filter_frame,
455  },
456 };
457 
459  {
460  .name = "default",
461  .type = AVMEDIA_TYPE_AUDIO,
462  .config_props = config_output,
463  },
464 };
465 
467  .name = "volume",
468  .description = NULL_IF_CONFIG_SMALL("Change input volume."),
469  .priv_size = sizeof(VolumeContext),
470  .priv_class = &volume_class,
471  .init = init,
472  .uninit = uninit,
477  .process_command = process_command,
478 };
PRECISION_FIXED
@ PRECISION_FIXED
Definition: af_volume.h:34
OFFSET
#define OFFSET(x)
Definition: af_volume.c:62
REPLAYGAIN_ALBUM
@ REPLAYGAIN_ALBUM
Definition: af_volume.h:65
af_volume.h
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_volume.c:113
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:100
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:83
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:691
VolumeContext
Definition: af_volume.h:68
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1009
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:326
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:116
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
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:167
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:739
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
replaygain.h
REPLAYGAIN_DROP
@ REPLAYGAIN_DROP
Definition: af_volume.h:62
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_volume.c:124
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:53
volume_init
static av_cold void volume_init(VolumeContext *vol)
Definition: af_volume.c:213
scale_samples_s32
static void scale_samples_s32(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:203
scale_samples_s16
static void scale_samples_s16(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:183
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:278
VAR_NB_CHANNELS
@ VAR_NB_CHANNELS
Definition: af_dynaudnorm.c:58
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(volume)
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:336
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
TS2T
#define TS2T(ts, tb)
Definition: internal.h:261
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:132
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
g
const char * g
Definition: vf_curves.c:127
AVFrame::pkt_pos
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:605
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:755
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:57
set_volume
static int set_volume(AVFilterContext *ctx)
Definition: af_volume.c:246
AVReplayGain::track_peak
uint32_t track_peak
Peak track amplitude, with 100000 representing full scale (but values may overflow).
Definition: replaygain.h:39
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: af_afftfilt.c:57
NAN
#define NAN
Definition: mathematics.h:64
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
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:175
scale_samples_u8
static void scale_samples_u8(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:167
VolumeContext::volume_expr
const char * volume_expr
Definition: af_volume.h:73
if
if(ret)
Definition: filter_design.txt:179
av_clip_int16
#define av_clip_int16
Definition: common.h:110
TS2D
#define TS2D(ts)
Definition: internal.h:260
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:603
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:466
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:310
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:721
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
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition: af_volume.h:78
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:115
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:113
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:56
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:233
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:533
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:193
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:412
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:791
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: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:152
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:405
avfilter_af_volume_outputs
static const AVFilterPad avfilter_af_volume_outputs[]
Definition: af_volume.c:458
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
VAR_STARTT
@ VAR_STARTT
Definition: af_volume.h:54
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:93
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:386
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:55
AVFilter
Filter definition.
Definition: avfilter.h:171
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:67
pos
unsigned int pos
Definition: spdifenc.c:412
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:65
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: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:77
AV_SAMPLE_FMT_DBLP
@ AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:67
ffmath.h
av_clip_uint8
#define av_clip_uint8
Definition: common.h:101
AVFilterContext
An instance of a filter.
Definition: avfilter.h:415
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
VAR_TB
@ VAR_TB
Definition: noise_bsf.c:48
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:231
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:78
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Definition: opt.h:244
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
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:561
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:450
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:156
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:59
REPLAYGAIN_TRACK
@ REPLAYGAIN_TRACK
Definition: af_volume.h:64
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