FFmpeg
af_crystalizer.c
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1 /*
2  * Copyright (c) 2016 The FFmpeg Project
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
22 #include "libavutil/opt.h"
23 #include "avfilter.h"
24 #include "audio.h"
25 #include "formats.h"
26 
27 typedef struct CrystalizerContext {
28  const AVClass *class;
29  float mult;
30  int clip;
32  void (*filter)(void **dst, void **prv, const void **src,
33  int nb_samples, int channels, float mult, int clip);
35 
36 #define OFFSET(x) offsetof(CrystalizerContext, x)
37 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
38 
39 static const AVOption crystalizer_options[] = {
40  { "i", "set intensity", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.0}, 0, 10, A },
41  { "c", "enable clipping", OFFSET(clip), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A },
42  { NULL }
43 };
44 
45 AVFILTER_DEFINE_CLASS(crystalizer);
46 
48 {
51  static const enum AVSampleFormat sample_fmts[] = {
55  };
56  int ret;
57 
58  formats = ff_make_format_list(sample_fmts);
59  if (!formats)
60  return AVERROR(ENOMEM);
61  ret = ff_set_common_formats(ctx, formats);
62  if (ret < 0)
63  return ret;
64 
65  layouts = ff_all_channel_counts();
66  if (!layouts)
67  return AVERROR(ENOMEM);
68 
69  ret = ff_set_common_channel_layouts(ctx, layouts);
70  if (ret < 0)
71  return ret;
72 
73  formats = ff_all_samplerates();
74  return ff_set_common_samplerates(ctx, formats);
75 }
76 
77 static void filter_flt(void **d, void **p, const void **s,
78  int nb_samples, int channels,
79  float mult, int clip)
80 {
81  const float *src = s[0];
82  float *dst = d[0];
83  float *prv = p[0];
84  int n, c;
85 
86  for (n = 0; n < nb_samples; n++) {
87  for (c = 0; c < channels; c++) {
88  float current = src[c];
89 
90  dst[c] = current + (current - prv[c]) * mult;
91  prv[c] = current;
92  if (clip) {
93  dst[c] = av_clipf(dst[c], -1, 1);
94  }
95  }
96 
97  dst += c;
98  src += c;
99  }
100 }
101 
102 static void filter_dbl(void **d, void **p, const void **s,
103  int nb_samples, int channels,
104  float mult, int clip)
105 {
106  const double *src = s[0];
107  double *dst = d[0];
108  double *prv = p[0];
109  int n, c;
110 
111  for (n = 0; n < nb_samples; n++) {
112  for (c = 0; c < channels; c++) {
113  double current = src[c];
114 
115  dst[c] = current + (current - prv[c]) * mult;
116  prv[c] = current;
117  if (clip) {
118  dst[c] = av_clipd(dst[c], -1, 1);
119  }
120  }
121 
122  dst += c;
123  src += c;
124  }
125 }
126 
127 static void filter_fltp(void **d, void **p, const void **s,
128  int nb_samples, int channels,
129  float mult, int clip)
130 {
131  int n, c;
132 
133  for (c = 0; c < channels; c++) {
134  const float *src = s[c];
135  float *dst = d[c];
136  float *prv = p[c];
137 
138  for (n = 0; n < nb_samples; n++) {
139  float current = src[n];
140 
141  dst[n] = current + (current - prv[0]) * mult;
142  prv[0] = current;
143  if (clip) {
144  dst[n] = av_clipf(dst[n], -1, 1);
145  }
146  }
147  }
148 }
149 
150 static void filter_dblp(void **d, void **p, const void **s,
151  int nb_samples, int channels,
152  float mult, int clip)
153 {
154  int n, c;
155 
156  for (c = 0; c < channels; c++) {
157  const double *src = s[c];
158  double *dst = d[c];
159  double *prv = p[c];
160 
161  for (n = 0; n < nb_samples; n++) {
162  double current = src[n];
163 
164  dst[n] = current + (current - prv[0]) * mult;
165  prv[0] = current;
166  if (clip) {
167  dst[n] = av_clipd(dst[n], -1, 1);
168  }
169  }
170  }
171 }
172 
174 {
175  AVFilterContext *ctx = inlink->dst;
176  CrystalizerContext *s = ctx->priv;
177 
178  switch (inlink->format) {
179  case AV_SAMPLE_FMT_FLT: s->filter = filter_flt; break;
180  case AV_SAMPLE_FMT_DBL: s->filter = filter_dbl; break;
181  case AV_SAMPLE_FMT_FLTP: s->filter = filter_fltp; break;
182  case AV_SAMPLE_FMT_DBLP: s->filter = filter_dblp; break;
183  }
184 
185  return 0;
186 }
187 
189 {
190  AVFilterContext *ctx = inlink->dst;
191  AVFilterLink *outlink = ctx->outputs[0];
192  CrystalizerContext *s = ctx->priv;
193  AVFrame *out;
194 
195  if (!s->prev) {
196  s->prev = ff_get_audio_buffer(inlink, 1);
197  if (!s->prev) {
198  av_frame_free(&in);
199  return AVERROR(ENOMEM);
200  }
201  }
202 
203  if (av_frame_is_writable(in)) {
204  out = in;
205  } else {
206  out = ff_get_audio_buffer(outlink, in->nb_samples);
207  if (!out) {
208  av_frame_free(&in);
209  return AVERROR(ENOMEM);
210  }
211  av_frame_copy_props(out, in);
212  }
213 
214  s->filter((void **)out->extended_data, (void **)s->prev->extended_data, (const void **)in->extended_data,
215  in->nb_samples, in->channels, s->mult, s->clip);
216 
217  if (out != in)
218  av_frame_free(&in);
219 
220  return ff_filter_frame(outlink, out);
221 }
222 
224 {
225  CrystalizerContext *s = ctx->priv;
226 
227  av_frame_free(&s->prev);
228 }
229 
230 static const AVFilterPad inputs[] = {
231  {
232  .name = "default",
233  .type = AVMEDIA_TYPE_AUDIO,
234  .filter_frame = filter_frame,
235  .config_props = config_input,
236  },
237  { NULL }
238 };
239 
240 static const AVFilterPad outputs[] = {
241  {
242  .name = "default",
243  .type = AVMEDIA_TYPE_AUDIO,
244  },
245  { NULL }
246 };
247 
249  .name = "crystalizer",
250  .description = NULL_IF_CONFIG_SMALL("Simple expand audio dynamic range filter."),
251  .query_formats = query_formats,
252  .priv_size = sizeof(CrystalizerContext),
253  .priv_class = &crystalizer_class,
254  .uninit = uninit,
255  .inputs = inputs,
256  .outputs = outputs,
257 };
float, planar
Definition: samplefmt.h:69
#define NULL
Definition: coverity.c:32
void(* filter)(void **dst, void **prv, const void **src, int nb_samples, int channels, float mult, int clip)
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:550
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
Main libavfilter public API header.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
channels
Definition: aptx.c:30
#define OFFSET(x)
double, planar
Definition: samplefmt.h:70
AVFILTER_DEFINE_CLASS(crystalizer)
static void filter_dblp(void **d, void **p, const void **s, int nb_samples, int channels, float mult, int clip)
#define src
Definition: vp8dsp.c:254
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
#define av_cold
Definition: attributes.h:82
AVOptions.
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
A filter pad used for either input or output.
Definition: internal.h:54
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:569
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
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
static void filter_dbl(void **d, void **p, const void **s, int nb_samples, int channels, float mult, int clip)
int channels
number of audio channels, only used for audio.
Definition: frame.h:601
audio channel layout utility functions
static void filter_fltp(void **d, void **p, const void **s, int nb_samples, int channels, float mult, int clip)
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
int n
Definition: avisynth_c.h:760
#define A
A list of supported channel layouts.
Definition: formats.h:85
static void filter_flt(void **d, void **p, const void **s, int nb_samples, int channels, float mult, int clip)
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
const char * name
Filter name.
Definition: avfilter.h:148
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:394
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
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad outputs[]
static const AVOption crystalizer_options[]
static const AVFilterPad inputs[]
static int config_input(AVFilterLink *inlink)
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
FILE * out
Definition: movenc.c:54
formats
Definition: signature.h:48
AVFilter ff_af_crystalizer
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
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:409
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:342
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:361
static av_cold void uninit(AVFilterContext *ctx)
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:557
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654