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/mem.h"
33 #include "libavutil/opt.h"
34 #include "libavutil/replaygain.h"
35 
36 #include "audio.h"
37 #include "avfilter.h"
38 #include "filters.h"
39 #include "formats.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  "pts", ///< frame presentation timestamp
52  "sample_rate", ///< sample rate
53  "startpts", ///< PTS at start of stream
54  "startt", ///< time at start of stream
55  "t", ///< time in the file of the frame
56  "tb", ///< timebase
57  "volume", ///< last set value
58  NULL
59 };
60 
61 #define OFFSET(x) offsetof(VolumeContext, x)
62 #define A AV_OPT_FLAG_AUDIO_PARAM
63 #define F AV_OPT_FLAG_FILTERING_PARAM
64 #define T AV_OPT_FLAG_RUNTIME_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|T },
69  { "precision", "select mathematical precision",
70  OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, .unit = "precision" },
71  { "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A|F, .unit = "precision" },
72  { "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A|F, .unit = "precision" },
73  { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, .unit = "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, .unit = "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, .unit = "replaygain" },
79  { "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A|F, .unit = "replaygain" },
80  { "ignore", "replaygain side data is ignored", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_IGNORE }, 0, 0, A|F, .unit = "replaygain" },
81  { "track", "track gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_TRACK }, 0, 0, A|F, .unit = "replaygain" },
82  { "album", "album gain is preferred", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_ALBUM }, 0, 0, A|F, .unit = "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 
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 
124 {
125  VolumeContext *vol = ctx->priv;
127  av_freep(&vol->fdsp);
128 }
129 
131  AVFilterFormatsConfig **cfg_in,
132  AVFilterFormatsConfig **cfg_out)
133 {
134  const 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  };
156  int ret;
157 
158  ret = ff_set_common_formats_from_list2(ctx, cfg_in, cfg_out, sample_fmts[vol->precision]);
159  if (ret < 0)
160  return ret;
161 
162  return 0;
163 }
164 
165 static inline void scale_samples_u8(uint8_t *dst, const uint8_t *src,
166  int nb_samples, int volume)
167 {
168  int i;
169  for (i = 0; i < nb_samples; i++)
170  dst[i] = av_clip_uint8(((((int64_t)src[i] - 128) * volume + 128) >> 8) + 128);
171 }
172 
173 static inline void scale_samples_u8_small(uint8_t *dst, const uint8_t *src,
174  int nb_samples, int volume)
175 {
176  int i;
177  for (i = 0; i < nb_samples; i++)
178  dst[i] = av_clip_uint8((((src[i] - 128) * volume + 128) >> 8) + 128);
179 }
180 
181 static inline void scale_samples_s16(uint8_t *dst, const uint8_t *src,
182  int nb_samples, int volume)
183 {
184  int i;
185  int16_t *smp_dst = (int16_t *)dst;
186  const int16_t *smp_src = (const int16_t *)src;
187  for (i = 0; i < nb_samples; i++)
188  smp_dst[i] = av_clip_int16(((int64_t)smp_src[i] * volume + 128) >> 8);
189 }
190 
191 static inline void scale_samples_s16_small(uint8_t *dst, const uint8_t *src,
192  int nb_samples, int volume)
193 {
194  int i;
195  int16_t *smp_dst = (int16_t *)dst;
196  const int16_t *smp_src = (const int16_t *)src;
197  for (i = 0; i < nb_samples; i++)
198  smp_dst[i] = av_clip_int16((smp_src[i] * volume + 128) >> 8);
199 }
200 
201 static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
202  int nb_samples, int volume)
203 {
204  int i;
205  int32_t *smp_dst = (int32_t *)dst;
206  const int32_t *smp_src = (const int32_t *)src;
207  for (i = 0; i < nb_samples; i++)
208  smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
209 }
210 
212 {
213  vol->samples_align = 1;
214 
215  switch (av_get_packed_sample_fmt(vol->sample_fmt)) {
216  case AV_SAMPLE_FMT_U8:
217  if (vol->volume_i < 0x1000000)
219  else
221  break;
222  case AV_SAMPLE_FMT_S16:
223  if (vol->volume_i < 0x10000)
225  else
227  break;
228  case AV_SAMPLE_FMT_S32:
230  break;
231  case AV_SAMPLE_FMT_FLT:
232  vol->samples_align = 4;
233  break;
234  case AV_SAMPLE_FMT_DBL:
235  vol->samples_align = 8;
236  break;
237  }
238 
239 #if ARCH_X86
240  ff_volume_init_x86(vol);
241 #endif
242 }
243 
245 {
246  VolumeContext *vol = ctx->priv;
247 
248  vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
249  if (isnan(vol->volume)) {
250  if (vol->eval_mode == EVAL_MODE_ONCE) {
251  av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
252  return AVERROR(EINVAL);
253  } else {
254  av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
255  vol->volume = 0;
256  }
257  }
258  vol->var_values[VAR_VOLUME] = vol->volume;
259 
260  av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
261  vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
262  precision_str[vol->precision]);
263 
264  if (vol->precision == PRECISION_FIXED) {
265  vol->volume_i = (int)(vol->volume * 256 + 0.5);
266  vol->volume = vol->volume_i / 256.0;
267  av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
268  }
269  av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
270  vol->volume, 20.0*log10(vol->volume));
271 
272  volume_init(vol);
273  return 0;
274 }
275 
276 static int config_output(AVFilterLink *outlink)
277 {
278  AVFilterContext *ctx = outlink->src;
279  VolumeContext *vol = ctx->priv;
280  AVFilterLink *inlink = ctx->inputs[0];
281 
282  vol->sample_fmt = inlink->format;
283  vol->channels = inlink->ch_layout.nb_channels;
284  vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
285 
286  vol->var_values[VAR_N] =
288  vol->var_values[VAR_NB_SAMPLES] =
289  vol->var_values[VAR_PTS] =
290  vol->var_values[VAR_STARTPTS] =
291  vol->var_values[VAR_STARTT] =
292  vol->var_values[VAR_T] =
293  vol->var_values[VAR_VOLUME] = NAN;
294 
295  vol->var_values[VAR_NB_CHANNELS] = inlink->ch_layout.nb_channels;
296  vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
297  vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
298 
299  av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
300  vol->var_values[VAR_TB],
303 
304  return set_volume(ctx);
305 }
306 
307 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
308  char *res, int res_len, int flags)
309 {
310  VolumeContext *vol = ctx->priv;
311  int ret = AVERROR(ENOSYS);
312 
313  if (!strcmp(cmd, "volume")) {
314  if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
315  return ret;
316  if (vol->eval_mode == EVAL_MODE_ONCE)
317  set_volume(ctx);
318  }
319 
320  return ret;
321 }
322 
324 {
326  AVFilterContext *ctx = inlink->dst;
327  VolumeContext *vol = inlink->dst->priv;
328  AVFilterLink *outlink = inlink->dst->outputs[0];
329  int nb_samples = buf->nb_samples;
330  AVFrame *out_buf;
332  int ret;
333 
334  if (sd && vol->replaygain != REPLAYGAIN_IGNORE) {
335  if (vol->replaygain != REPLAYGAIN_DROP) {
336  AVReplayGain *replaygain = (AVReplayGain*)sd->data;
337  int32_t gain = 100000;
338  uint32_t peak = 100000;
339  float g, p;
340 
341  if (vol->replaygain == REPLAYGAIN_TRACK &&
342  replaygain->track_gain != INT32_MIN) {
343  gain = replaygain->track_gain;
344 
345  if (replaygain->track_peak != 0)
346  peak = replaygain->track_peak;
347  } else if (replaygain->album_gain != INT32_MIN) {
348  gain = replaygain->album_gain;
349 
350  if (replaygain->album_peak != 0)
351  peak = replaygain->album_peak;
352  } else {
353  av_log(inlink->dst, AV_LOG_WARNING, "Both ReplayGain gain "
354  "values are unknown.\n");
355  }
356  g = gain / 100000.0f;
357  p = peak / 100000.0f;
358 
360  "Using gain %f dB from replaygain side data.\n", g);
361 
362  vol->volume = ff_exp10((g + vol->replaygain_preamp) / 20);
363  if (vol->replaygain_noclip)
364  vol->volume = FFMIN(vol->volume, 1.0 / p);
365  vol->volume_i = (int)(vol->volume * 256 + 0.5);
366 
367  volume_init(vol);
368  }
370  }
371 
372  if (isnan(vol->var_values[VAR_STARTPTS])) {
373  vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
374  vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
375  }
376  vol->var_values[VAR_PTS] = TS2D(buf->pts);
377  vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
378  vol->var_values[VAR_N ] = inl->frame_count_out;
379 
380  if (vol->eval_mode == EVAL_MODE_FRAME)
381  set_volume(ctx);
382 
383  if (vol->volume == 1.0 || vol->volume_i == 256) {
384  out_buf = buf;
385  goto end;
386  }
387 
388  /* do volume scaling in-place if input buffer is writable */
389  if (av_frame_is_writable(buf)
390  && (vol->precision != PRECISION_FIXED || vol->volume_i > 0)) {
391  out_buf = buf;
392  } else {
393  out_buf = ff_get_audio_buffer(outlink, nb_samples);
394  if (!out_buf) {
395  av_frame_free(&buf);
396  return AVERROR(ENOMEM);
397  }
398  ret = av_frame_copy_props(out_buf, buf);
399  if (ret < 0) {
400  av_frame_free(&out_buf);
401  av_frame_free(&buf);
402  return ret;
403  }
404  }
405 
406  if (vol->precision != PRECISION_FIXED || vol->volume_i > 0) {
407  int p, plane_samples;
408 
410  plane_samples = FFALIGN(nb_samples, vol->samples_align);
411  else
412  plane_samples = FFALIGN(nb_samples * vol->channels, vol->samples_align);
413 
414  if (vol->precision == PRECISION_FIXED) {
415  for (p = 0; p < vol->planes; p++) {
416  vol->scale_samples(out_buf->extended_data[p],
417  buf->extended_data[p], plane_samples,
418  vol->volume_i);
419  }
421  for (p = 0; p < vol->planes; p++) {
422  vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
423  (const float *)buf->extended_data[p],
424  vol->volume, plane_samples);
425  }
426  } else {
427  for (p = 0; p < vol->planes; p++) {
428  vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
429  (const double *)buf->extended_data[p],
430  vol->volume, plane_samples);
431  }
432  }
433  }
434 
435  if (buf != out_buf)
436  av_frame_free(&buf);
437 
438 end:
440  return ff_filter_frame(outlink, out_buf);
441 }
442 
444  {
445  .name = "default",
446  .type = AVMEDIA_TYPE_AUDIO,
447  .filter_frame = filter_frame,
448  },
449 };
450 
452  {
453  .name = "default",
454  .type = AVMEDIA_TYPE_AUDIO,
455  .config_props = config_output,
456  },
457 };
458 
460  .p.name = "volume",
461  .p.description = NULL_IF_CONFIG_SMALL("Change input volume."),
462  .p.priv_class = &volume_class,
464  .priv_size = sizeof(VolumeContext),
465  .init = init,
466  .uninit = uninit,
470  .process_command = process_command,
471 };
PRECISION_FIXED
@ PRECISION_FIXED
Definition: af_volume.h:34
flags
const SwsFlags flags[]
Definition: swscale.c:61
OFFSET
#define OFFSET(x)
Definition: af_volume.c:61
REPLAYGAIN_ALBUM
@ REPLAYGAIN_ALBUM
Definition: af_volume.h:64
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:98
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:215
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:82
av_frame_get_side_data
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
Definition: frame.c:661
VolumeContext
Definition: af_volume.h:67
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1053
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:948
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:323
VAR_NB_CONSUMED_SAMPLES
@ VAR_NB_CONSUMED_SAMPLES
Definition: af_volume.h:48
int64_t
long long int64_t
Definition: coverity.c:34
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:63
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: filters.h:262
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:410
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:512
AVOption
AVOption.
Definition: opt.h:429
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:65
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:225
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:203
replaygain.h
REPLAYGAIN_DROP
@ REPLAYGAIN_DROP
Definition: af_volume.h:61
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_volume.c:123
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:710
VAR_T
@ VAR_T
Definition: aeval.c:53
volume_init
static av_cold void volume_init(VolumeContext *vol)
Definition: af_volume.c:211
scale_samples_s32
static void scale_samples_s32(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:201
scale_samples_s16
static void scale_samples_s16(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:181
VolumeContext::volume_pexpr
AVExpr * volume_pexpr
Definition: af_volume.h:73
VolumeContext::replaygain_noclip
int replaygain_noclip
Definition: af_volume.h:78
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_volume.c:276
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(volume)
VAR_TB
@ VAR_TB
Definition: noise.c:49
VolumeContext::eval_mode
int eval_mode
Definition: af_volume.h:71
VolumeContext::channels
int channels
Definition: af_volume.h:81
av_expr_free
void av_expr_free(AVExpr *e)
Free a parsed expression previously created with av_expr_parse().
Definition: eval.c:358
AVFilterPad
A filter pad used for either input or output.
Definition: filters.h:38
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:209
av_cold
#define av_cold
Definition: attributes.h:90
FFFilter
Definition: filters.h:265
g
const char * g
Definition: vf_curves.c:128
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Underlying C type is double.
Definition: opt.h:267
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:114
filters.h
ctx
AVFormatContext * ctx
Definition: movenc.c:49
av_expr_eval
double av_expr_eval(AVExpr *e, const double *const_values, void *opaque)
Evaluate a previously parsed expression.
Definition: eval.c:792
AVExpr
Definition: eval.c:158
PRECISION_DOUBLE
@ PRECISION_DOUBLE
Definition: af_volume.h:36
VAR_N
@ VAR_N
Definition: noise.c:48
VAR_VOLUME
@ VAR_VOLUME
Definition: af_volume.h:56
set_volume
static int set_volume(AVFilterContext *ctx)
Definition: af_volume.c:244
AVReplayGain::track_peak
uint32_t track_peak
Peak track amplitude, with 100000 representing full scale (but values may overflow).
Definition: replaygain.h:39
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: filters.h:263
NAN
#define NAN
Definition: mathematics.h:115
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:173
scale_samples_u8
static void scale_samples_u8(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.c:165
VolumeContext::volume_expr
const char * volume_expr
Definition: af_volume.h:72
if
if(ret)
Definition: filter_design.txt:179
av_clip_int16
#define av_clip_int16
Definition: common.h:115
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:601
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:342
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:307
VAR_SAMPLE_RATE
@ VAR_SAMPLE_RATE
Definition: af_afftfilt.c:57
VolumeContext::var_values
double var_values[VAR_VARS_NB]
Definition: af_volume.h:74
AVFilterFormatsConfig
Lists of formats / etc.
Definition: avfilter.h:109
VolumeContext::volume_i
int volume_i
Definition: af_volume.h:80
ff_filter_link
static FilterLink * ff_filter_link(AVFilterLink *link)
Definition: filters.h:197
float_dsp.h
TS2D
#define TS2D(ts)
Definition: filters.h:480
VolumeContext::replaygain_preamp
double replaygain_preamp
Definition: af_volume.h:77
VAR_STARTPTS
@ VAR_STARTPTS
Definition: noise.c:53
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:94
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:118
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
VolumeContext::replaygain
int replaygain
Definition: af_volume.h:76
ff_af_volume
const FFFilter ff_af_volume
Definition: af_volume.c:459
REPLAYGAIN_IGNORE
@ REPLAYGAIN_IGNORE
Definition: af_volume.h:62
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:63
AVFrameSideData::data
uint8_t * data
Definition: frame.h:267
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:537
TS2T
#define TS2T(ts, tb)
Definition: filters.h:481
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:191
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:497
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:727
VolumeContext::samples_align
int samples_align
Definition: af_volume.h:87
VolumeContext::scale_samples
void(* scale_samples)(uint8_t *dst, const uint8_t *src, int nb_samples, int volume)
Definition: af_volume.h:85
VolumeContext::volume
double volume
Definition: af_volume.h:79
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:64
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:180
VAR_PTS
@ VAR_PTS
Definition: noise.c:50
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:490
avfilter_af_volume_outputs
static const AVFilterPad avfilter_af_volume_outputs[]
Definition: af_volume.c:451
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
VAR_STARTT
@ VAR_STARTT
Definition: af_volume.h:53
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:92
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:471
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
FILTER_QUERY_FUNC2
#define FILTER_QUERY_FUNC2(func)
Definition: filters.h:239
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: filters.h:44
VAR_NB_CHANNELS
@ VAR_NB_CHANNELS
Definition: af_adrc.c:46
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
T
#define T
Definition: af_volume.c:64
ff_set_common_formats_from_list2
int ff_set_common_formats_from_list2(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out, const int *fmts)
Definition: formats.c:1016
channel_layout.h
EVAL_MODE_FRAME
@ EVAL_MODE_FRAME
Definition: af_volume.h:41
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
avfilter.h
VolumeContext::precision
int precision
Definition: af_volume.h:70
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:69
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
query_formats
static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out)
Definition: af_volume.c:130
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:106
AVFilterContext
An instance of a filter.
Definition: avfilter.h:257
AVReplayGain
ReplayGain information (see http://wiki.hydrogenaudio.org/index.php?title=ReplayGain_1....
Definition: replaygain.h:29
FFFilter::p
AVFilter p
The public AVFilter.
Definition: filters.h:269
VolumeContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition: af_volume.h:83
mem.h
audio.h
AVFrameSideData
Structure to hold side data for an AVFrame.
Definition: frame.h:265
PRECISION_FLOAT
@ PRECISION_FLOAT
Definition: af_volume.h:35
A
#define A
Definition: af_volume.c:62
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
AV_OPT_TYPE_BOOL
@ AV_OPT_TYPE_BOOL
Underlying C type is int.
Definition: opt.h:327
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
int32_t
int32_t
Definition: audioconvert.c:56
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:443
AV_SAMPLE_FMT_DBL
@ AV_SAMPLE_FMT_DBL
double
Definition: samplefmt.h:61
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Underlying C type is a uint8_t* that is either NULL or points to a C string allocated with the av_mal...
Definition: opt.h:276
AV_SAMPLE_FMT_S32
@ AV_SAMPLE_FMT_S32
signed 32 bits
Definition: samplefmt.h:59
REPLAYGAIN_TRACK
@ REPLAYGAIN_TRACK
Definition: af_volume.h:63
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Special option type for declaring named constants.
Definition: opt.h:299
AV_SAMPLE_FMT_FLT
@ AV_SAMPLE_FMT_FLT
float
Definition: samplefmt.h:60
src
#define src
Definition: vp8dsp.c:248