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af_acontrast.c
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1 /*
2  * Copyright (c) 2008 Rob Sykes
3  * Copyright (c) 2017 Paul B Mahol
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 
23 #include "libavutil/opt.h"
24 #include "avfilter.h"
25 #include "audio.h"
26 #include "formats.h"
27 
28 typedef struct AudioContrastContext {
29  const AVClass *class;
30  float contrast;
31  void (*filter)(void **dst, const void **src,
32  int nb_samples, int channels, float contrast);
34 
35 #define OFFSET(x) offsetof(AudioContrastContext, x)
36 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
37 
38 static const AVOption acontrast_options[] = {
39  { "contrast", "set contrast", OFFSET(contrast), AV_OPT_TYPE_FLOAT, {.dbl=33}, 0, 100, A },
40  { NULL }
41 };
42 
43 AVFILTER_DEFINE_CLASS(acontrast);
44 
46 {
49  static const enum AVSampleFormat sample_fmts[] = {
53  };
54  int ret;
55 
56  formats = ff_make_format_list(sample_fmts);
57  if (!formats)
58  return AVERROR(ENOMEM);
59  ret = ff_set_common_formats(ctx, formats);
60  if (ret < 0)
61  return ret;
62 
63  layouts = ff_all_channel_counts();
64  if (!layouts)
65  return AVERROR(ENOMEM);
66 
67  ret = ff_set_common_channel_layouts(ctx, layouts);
68  if (ret < 0)
69  return ret;
70 
71  formats = ff_all_samplerates();
72  return ff_set_common_samplerates(ctx, formats);
73 }
74 
75 static void filter_flt(void **d, const void **s,
76  int nb_samples, int channels,
77  float contrast)
78 {
79  const float *src = s[0];
80  float *dst = d[0];
81  int n, c;
82 
83  for (n = 0; n < nb_samples; n++) {
84  for (c = 0; c < channels; c++) {
85  float d = src[c] * M_PI_2;
86 
87  dst[c] = sinf(d + contrast * sinf(d * 4));
88  }
89 
90  dst += c;
91  src += c;
92  }
93 }
94 
95 static void filter_dbl(void **d, const void **s,
96  int nb_samples, int channels,
97  float contrast)
98 {
99  const double *src = s[0];
100  double *dst = d[0];
101  int n, c;
102 
103  for (n = 0; n < nb_samples; n++) {
104  for (c = 0; c < channels; c++) {
105  double d = src[c] * M_PI_2;
106 
107  dst[c] = sin(d + contrast * sin(d * 4));
108  }
109 
110  dst += c;
111  src += c;
112  }
113 }
114 
115 static void filter_fltp(void **d, const void **s,
116  int nb_samples, int channels,
117  float contrast)
118 {
119  int n, c;
120 
121  for (c = 0; c < channels; c++) {
122  const float *src = s[c];
123  float *dst = d[c];
124 
125  for (n = 0; n < nb_samples; n++) {
126  float d = src[n] * M_PI_2;
127 
128  dst[n] = sinf(d + contrast * sinf(d * 4));
129  }
130  }
131 }
132 
133 static void filter_dblp(void **d, const void **s,
134  int nb_samples, int channels,
135  float contrast)
136 {
137  int n, c;
138 
139  for (c = 0; c < channels; c++) {
140  const double *src = s[c];
141  double *dst = d[c];
142 
143  for (n = 0; n < nb_samples; n++) {
144  double d = src[n] * M_PI_2;
145 
146  dst[n] = sin(d + contrast * sin(d * 4));
147  }
148  }
149 }
150 
151 static int config_input(AVFilterLink *inlink)
152 {
153  AVFilterContext *ctx = inlink->dst;
154  AudioContrastContext *s = ctx->priv;
155 
156  switch (inlink->format) {
157  case AV_SAMPLE_FMT_FLT: s->filter = filter_flt; break;
158  case AV_SAMPLE_FMT_DBL: s->filter = filter_dbl; break;
159  case AV_SAMPLE_FMT_FLTP: s->filter = filter_fltp; break;
160  case AV_SAMPLE_FMT_DBLP: s->filter = filter_dblp; break;
161  }
162 
163  return 0;
164 }
165 
166 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
167 {
168  AVFilterContext *ctx = inlink->dst;
169  AVFilterLink *outlink = ctx->outputs[0];
170  AudioContrastContext *s = ctx->priv;
171  AVFrame *out;
172 
173  if (av_frame_is_writable(in)) {
174  out = in;
175  } else {
176  out = ff_get_audio_buffer(outlink, in->nb_samples);
177  if (!out) {
178  av_frame_free(&in);
179  return AVERROR(ENOMEM);
180  }
181  av_frame_copy_props(out, in);
182  }
183 
184  s->filter((void **)out->extended_data, (const void **)in->extended_data,
185  in->nb_samples, in->channels, s->contrast / 750);
186 
187  if (out != in)
188  av_frame_free(&in);
189 
190  return ff_filter_frame(outlink, out);
191 }
192 
193 static const AVFilterPad inputs[] = {
194  {
195  .name = "default",
196  .type = AVMEDIA_TYPE_AUDIO,
197  .filter_frame = filter_frame,
198  .config_props = config_input,
199  },
200  { NULL }
201 };
202 
203 static const AVFilterPad outputs[] = {
204  {
205  .name = "default",
206  .type = AVMEDIA_TYPE_AUDIO,
207  },
208  { NULL }
209 };
210 
212  .name = "acontrast",
213  .description = NULL_IF_CONFIG_SMALL("Simple audio dynamic range compression/expansion filter."),
214  .query_formats = query_formats,
215  .priv_size = sizeof(AudioContrastContext),
216  .priv_class = &acontrast_class,
217  .inputs = inputs,
218  .outputs = outputs,
219 };
float, planar
Definition: samplefmt.h:69
static const AVOption acontrast_options[]
Definition: af_acontrast.c:38
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:549
void(* filter)(void **dst, const void **src, int nb_samples, int channels, float contrast)
Definition: af_acontrast.c:31
This structure describes decoded (raw) audio or video data.
Definition: frame.h:226
AVOption.
Definition: opt.h:246
Main libavfilter public API header.
channels
Definition: aptx.c:30
double, planar
Definition: samplefmt.h:70
#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:1080
AVOptions.
#define OFFSET(x)
Definition: af_acontrast.c:35
static void filter_flt(void **d, const void **s, int nb_samples, int channels, float contrast)
Definition: af_acontrast.c:75
A filter pad used for either input or output.
Definition: internal.h:54
AVFILTER_DEFINE_CLASS(acontrast)
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:568
static int query_formats(AVFilterContext *ctx)
Definition: af_acontrast.c:45
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
#define AVERROR(e)
Definition: error.h:43
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
int channels
number of audio channels, only used for audio.
Definition: frame.h:531
audio channel layout utility functions
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
#define M_PI_2
Definition: mathematics.h:55
AVFormatContext * ctx
Definition: movenc.c:48
static void filter_dbl(void **d, const void **s, int nb_samples, int channels, float contrast)
Definition: af_acontrast.c:95
static void filter_fltp(void **d, const void **s, int nb_samples, int channels, float contrast)
Definition: af_acontrast.c:115
#define s(width, name)
Definition: cbs_vp9.c:257
int n
Definition: avisynth_c.h:684
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A list of supported channel layouts.
Definition: formats.h:85
AVFilter ff_af_acontrast
Definition: af_acontrast.c:211
#define sinf(x)
Definition: libm.h:419
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
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_acontrast.c:166
static int config_input(AVFilterLink *inlink)
Definition: af_acontrast.c:151
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;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);returnNULL;}returnac;}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;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->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);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_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
static void filter_dblp(void **d, const void **s, int nb_samples, int channels, float contrast)
Definition: af_acontrast.c:133
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:395
static double c[64]
#define A
Definition: af_acontrast.c:36
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
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:410
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:273
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:292
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654