LCOV - code coverage report
Current view: top level - src/libavfilter - af_crystalizer.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 103 0.0 %
Date: 2017-07-21 15:41:20 Functions: 0 8 0.0 %

          Line data    Source code
       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             : 
      21             : #include "libavutil/channel_layout.h"
      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;
      31             :     AVFrame *prev;
      32             :     void (*filter)(void **dst, void **prv, const void **src,
      33             :                    int nb_samples, int channels, float mult, int clip);
      34             : } CrystalizerContext;
      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             : 
      47           0 : static int query_formats(AVFilterContext *ctx)
      48             : {
      49           0 :     AVFilterFormats *formats = NULL;
      50           0 :     AVFilterChannelLayouts *layouts = NULL;
      51             :     static const enum AVSampleFormat sample_fmts[] = {
      52             :         AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLTP,
      53             :         AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBLP,
      54             :         AV_SAMPLE_FMT_NONE
      55             :     };
      56             :     int ret;
      57             : 
      58           0 :     formats = ff_make_format_list(sample_fmts);
      59           0 :     if (!formats)
      60           0 :         return AVERROR(ENOMEM);
      61           0 :     ret = ff_set_common_formats(ctx, formats);
      62           0 :     if (ret < 0)
      63           0 :         return ret;
      64             : 
      65           0 :     layouts = ff_all_channel_counts();
      66           0 :     if (!layouts)
      67           0 :         return AVERROR(ENOMEM);
      68             : 
      69           0 :     ret = ff_set_common_channel_layouts(ctx, layouts);
      70           0 :     if (ret < 0)
      71           0 :         return ret;
      72             : 
      73           0 :     formats = ff_all_samplerates();
      74           0 :     return ff_set_common_samplerates(ctx, formats);
      75             : }
      76             : 
      77           0 : static void filter_flt(void **d, void **p, const void **s,
      78             :                        int nb_samples, int channels,
      79             :                        float mult, int clip)
      80             : {
      81           0 :     const float *src = s[0];
      82           0 :     float *dst = d[0];
      83           0 :     float *prv = p[0];
      84             :     int n, c;
      85             : 
      86           0 :     for (n = 0; n < nb_samples; n++) {
      87           0 :         for (c = 0; c < channels; c++) {
      88           0 :             float current = src[c];
      89             : 
      90           0 :             dst[c] = current + (current - prv[c]) * mult;
      91           0 :             prv[c] = current;
      92           0 :             if (clip) {
      93           0 :                 dst[c] = av_clipf(dst[c], -1, 1);
      94             :             }
      95             :         }
      96             : 
      97           0 :         dst += c;
      98           0 :         src += c;
      99             :     }
     100           0 : }
     101             : 
     102           0 : static void filter_dbl(void **d, void **p, const void **s,
     103             :                        int nb_samples, int channels,
     104             :                        float mult, int clip)
     105             : {
     106           0 :     const double *src = s[0];
     107           0 :     double *dst = d[0];
     108           0 :     double *prv = p[0];
     109             :     int n, c;
     110             : 
     111           0 :     for (n = 0; n < nb_samples; n++) {
     112           0 :         for (c = 0; c < channels; c++) {
     113           0 :             double current = src[c];
     114             : 
     115           0 :             dst[c] = current + (current - prv[c]) * mult;
     116           0 :             prv[c] = current;
     117           0 :             if (clip) {
     118           0 :                 dst[c] = av_clipd(dst[c], -1, 1);
     119             :             }
     120             :         }
     121             : 
     122           0 :         dst += c;
     123           0 :         src += c;
     124             :     }
     125           0 : }
     126             : 
     127           0 : 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           0 :     for (c = 0; c < channels; c++) {
     134           0 :         const float *src = s[c];
     135           0 :         float *dst = d[c];
     136           0 :         float *prv = p[c];
     137             : 
     138           0 :         for (n = 0; n < nb_samples; n++) {
     139           0 :             float current = src[n];
     140             : 
     141           0 :             dst[n] = current + (current - prv[0]) * mult;
     142           0 :             prv[0] = current;
     143           0 :             if (clip) {
     144           0 :                 dst[n] = av_clipf(dst[n], -1, 1);
     145             :             }
     146             :         }
     147             :     }
     148           0 : }
     149             : 
     150           0 : 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           0 :     for (c = 0; c < channels; c++) {
     157           0 :         const double *src = s[c];
     158           0 :         double *dst = d[c];
     159           0 :         double *prv = p[c];
     160             : 
     161           0 :         for (n = 0; n < nb_samples; n++) {
     162           0 :             double current = src[n];
     163             : 
     164           0 :             dst[n] = current + (current - prv[0]) * mult;
     165           0 :             prv[0] = current;
     166           0 :             if (clip) {
     167           0 :                 dst[n] = av_clipd(dst[n], -1, 1);
     168             :             }
     169             :         }
     170             :     }
     171           0 : }
     172             : 
     173           0 : static int config_input(AVFilterLink *inlink)
     174             : {
     175           0 :     AVFilterContext *ctx = inlink->dst;
     176           0 :     CrystalizerContext *s    = ctx->priv;
     177             : 
     178           0 :     switch (inlink->format) {
     179           0 :     case AV_SAMPLE_FMT_FLT:  s->filter = filter_flt;  break;
     180           0 :     case AV_SAMPLE_FMT_DBL:  s->filter = filter_dbl;  break;
     181           0 :     case AV_SAMPLE_FMT_FLTP: s->filter = filter_fltp; break;
     182           0 :     case AV_SAMPLE_FMT_DBLP: s->filter = filter_dblp; break;
     183             :     }
     184             : 
     185           0 :     return 0;
     186             : }
     187             : 
     188           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     189             : {
     190           0 :     AVFilterContext *ctx = inlink->dst;
     191           0 :     AVFilterLink *outlink = ctx->outputs[0];
     192           0 :     CrystalizerContext *s = ctx->priv;
     193             :     AVFrame *out;
     194             : 
     195           0 :     if (!s->prev) {
     196           0 :         s->prev = ff_get_audio_buffer(inlink, 1);
     197           0 :         if (!s->prev) {
     198           0 :             av_frame_free(&in);
     199           0 :             return AVERROR(ENOMEM);
     200             :         }
     201             :     }
     202             : 
     203           0 :     if (av_frame_is_writable(in)) {
     204           0 :         out = in;
     205             :     } else {
     206           0 :         out = ff_get_audio_buffer(inlink, in->nb_samples);
     207           0 :         if (!out) {
     208           0 :             av_frame_free(&in);
     209           0 :             return AVERROR(ENOMEM);
     210             :         }
     211           0 :         av_frame_copy_props(out, in);
     212             :     }
     213             : 
     214           0 :     s->filter((void **)out->extended_data, (void **)s->prev->extended_data, (const void **)in->extended_data,
     215           0 :               in->nb_samples, in->channels, s->mult, s->clip);
     216             : 
     217           0 :     if (out != in)
     218           0 :         av_frame_free(&in);
     219             : 
     220           0 :     return ff_filter_frame(outlink, out);
     221             : }
     222             : 
     223           0 : static av_cold void uninit(AVFilterContext *ctx)
     224             : {
     225           0 :     CrystalizerContext *s = ctx->priv;
     226             : 
     227           0 :     av_frame_free(&s->prev);
     228           0 : }
     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             : 
     248             : AVFilter ff_af_crystalizer = {
     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             : };

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