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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;
33 
34 #define OFFSET(x) offsetof(CrystalizerContext, x)
35 #define A AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
36 
37 static const AVOption crystalizer_options[] = {
38  { "i", "set intensity", OFFSET(mult), AV_OPT_TYPE_FLOAT, {.dbl=2.0}, 0, 10, A },
39  { "c", "enable clipping", OFFSET(clip), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, A },
40  { NULL }
41 };
42 
43 AVFILTER_DEFINE_CLASS(crystalizer);
44 
46 {
49  int ret;
50 
51  if ((ret = ff_add_format (&formats, AV_SAMPLE_FMT_FLT )) < 0 ||
52  (ret = ff_set_common_formats(ctx , formats )) < 0)
53  return ret;
54 
55  layouts = ff_all_channel_counts();
56  if (!layouts)
57  return AVERROR(ENOMEM);
58 
59  ret = ff_set_common_channel_layouts(ctx, layouts);
60  if (ret < 0)
61  return ret;
62 
63  formats = ff_all_samplerates();
64  return ff_set_common_samplerates(ctx, formats);
65 }
66 
67 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
68 {
69  AVFilterContext *ctx = inlink->dst;
70  AVFilterLink *outlink = ctx->outputs[0];
71  CrystalizerContext *s = ctx->priv;
72  const float *src = (const float *)in->data[0];
73  const float mult = s->mult;
74  AVFrame *out;
75  float *dst, *prv;
76  int n, c;
77 
78  if (!s->prev) {
79  s->prev = ff_get_audio_buffer(inlink, 1);
80  if (!s->prev) {
81  av_frame_free(&in);
82  return AVERROR(ENOMEM);
83  }
84  }
85 
86  if (av_frame_is_writable(in)) {
87  out = in;
88  } else {
89  out = ff_get_audio_buffer(inlink, in->nb_samples);
90  if (!out) {
91  av_frame_free(&in);
92  return AVERROR(ENOMEM);
93  }
95  }
96 
97  dst = (float *)out->data[0];
98  prv = (float *)s->prev->data[0];
99 
100  for (n = 0; n < in->nb_samples; n++) {
101  for (c = 0; c < in->channels; c++) {
102  float current = src[c];
103 
104  dst[c] = current + (current - prv[c]) * mult;
105  prv[c] = current;
106  if (s->clip) {
107  dst[c] = av_clipf(dst[c], -1, 1);
108  }
109  }
110  dst += c;
111  src += c;
112  }
113 
114  if (out != in)
115  av_frame_free(&in);
116 
117  return ff_filter_frame(outlink, out);
118 }
119 
121 {
122  CrystalizerContext *s = ctx->priv;
123 
124  av_frame_free(&s->prev);
125 }
126 
127 static const AVFilterPad inputs[] = {
128  {
129  .name = "default",
130  .type = AVMEDIA_TYPE_AUDIO,
131  .filter_frame = filter_frame,
132  },
133  { NULL }
134 };
135 
136 static const AVFilterPad outputs[] = {
137  {
138  .name = "default",
139  .type = AVMEDIA_TYPE_AUDIO,
140  },
141  { NULL }
142 };
143 
145  .name = "crystalizer",
146  .description = NULL_IF_CONFIG_SMALL("Simple expand audio dynamic range filter."),
147  .query_formats = query_formats,
148  .priv_size = sizeof(CrystalizerContext),
149  .priv_class = &crystalizer_class,
150  .uninit = uninit,
151  .inputs = inputs,
152  .outputs = outputs,
153 };
#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
const char * s
Definition: avisynth_c.h:768
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
AVOption.
Definition: opt.h:245
Main libavfilter public API header.
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
#define OFFSET(x)
static enum AVSampleFormat formats[]
Definition: avresample.c:163
AVFILTER_DEFINE_CLASS(crystalizer)
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1189
#define av_cold
Definition: attributes.h:82
AVOptions.
A filter pad used for either input or output.
Definition: internal.h:53
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
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:64
#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:158
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
void * priv
private data for use by the filter
Definition: avfilter.h:322
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
int channels
number of audio channels, only used for audio.
Definition: frame.h:496
audio channel layout utility functions
AVFormatContext * ctx
Definition: movenc.c:48
int n
Definition: avisynth_c.h:684
#define src
Definition: vp9dsp.c:530
#define A
A list of supported channel layouts.
Definition: formats.h:85
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:529
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
static int16_t mult(Float11 *f1, Float11 *f2)
Definition: g726.c:55
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:319
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
if(ret< 0)
Definition: vf_mcdeint.c:282
static int query_formats(AVFilterContext *ctx)
static const AVFilterPad outputs[]
static double clip(void *opaque, double val)
Clip value val in the minval - maxval range.
Definition: vf_lut.c:157
static double c[64]
static const AVOption crystalizer_options[]
static const AVFilterPad inputs[]
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:307
FILE * out
Definition: movenc.c:54
AVFilter ff_af_crystalizer
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:410
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
static av_cold void uninit(AVFilterContext *ctx)
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:589