LCOV - code coverage report
Current view: top level - libavfilter - af_aderivative.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 59 0.0 %
Date: 2018-05-20 11:54:08 Functions: 0 10 0.0 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : #include "audio.h"
      20             : #include "avfilter.h"
      21             : #include "internal.h"
      22             : 
      23             : typedef struct ADerivativeContext {
      24             :     const AVClass *class;
      25             :     AVFrame *prev;
      26             :     void (*filter)(void **dst, void **prv, const void **src,
      27             :                    int nb_samples, int channels);
      28             : } ADerivativeContext;
      29             : 
      30           0 : static int query_formats(AVFilterContext *ctx)
      31             : {
      32           0 :     AVFilterFormats *formats = NULL;
      33           0 :     AVFilterChannelLayouts *layouts = NULL;
      34             :     static const enum AVSampleFormat derivative_sample_fmts[] = {
      35             :         AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_FLTP,
      36             :         AV_SAMPLE_FMT_S32P, AV_SAMPLE_FMT_DBLP,
      37             :         AV_SAMPLE_FMT_NONE
      38             :     };
      39             :     static const enum AVSampleFormat integral_sample_fmts[] = {
      40             :         AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_DBLP,
      41             :         AV_SAMPLE_FMT_NONE
      42             :     };
      43             :     int ret;
      44             : 
      45           0 :     formats = ff_make_format_list(strcmp(ctx->filter->name, "aintegral") ?
      46             :                                   derivative_sample_fmts : integral_sample_fmts);
      47           0 :     if (!formats)
      48           0 :         return AVERROR(ENOMEM);
      49           0 :     ret = ff_set_common_formats(ctx, formats);
      50           0 :     if (ret < 0)
      51           0 :         return ret;
      52             : 
      53           0 :     layouts = ff_all_channel_counts();
      54           0 :     if (!layouts)
      55           0 :         return AVERROR(ENOMEM);
      56             : 
      57           0 :     ret = ff_set_common_channel_layouts(ctx, layouts);
      58           0 :     if (ret < 0)
      59           0 :         return ret;
      60             : 
      61           0 :     formats = ff_all_samplerates();
      62           0 :     return ff_set_common_samplerates(ctx, formats);
      63             : }
      64             : 
      65             : #define DERIVATIVE(name, type)                                          \
      66             : static void aderivative_## name ##p(void **d, void **p, const void **s, \
      67             :                                     int nb_samples, int channels)       \
      68             : {                                                                       \
      69             :     int n, c;                                                           \
      70             :                                                                         \
      71             :     for (c = 0; c < channels; c++) {                                    \
      72             :         const type *src = s[c];                                         \
      73             :         type *dst = d[c];                                               \
      74             :         type *prv = p[c];                                               \
      75             :                                                                         \
      76             :         for (n = 0; n < nb_samples; n++) {                              \
      77             :             const type current = src[n];                                \
      78             :                                                                         \
      79             :             dst[n] = current - prv[0];                                  \
      80             :             prv[0] = current;                                           \
      81             :         }                                                               \
      82             :     }                                                                   \
      83             : }
      84             : 
      85           0 : DERIVATIVE(flt, float)
      86           0 : DERIVATIVE(dbl, double)
      87           0 : DERIVATIVE(s16, int16_t)
      88           0 : DERIVATIVE(s32, int32_t)
      89             : 
      90             : #define INTEGRAL(name, type)                                          \
      91             : static void aintegral_## name ##p(void **d, void **p, const void **s, \
      92             :                                   int nb_samples, int channels)       \
      93             : {                                                                     \
      94             :     int n, c;                                                         \
      95             :                                                                       \
      96             :     for (c = 0; c < channels; c++) {                                  \
      97             :         const type *src = s[c];                                       \
      98             :         type *dst = d[c];                                             \
      99             :         type *prv = p[c];                                             \
     100             :                                                                       \
     101             :         for (n = 0; n < nb_samples; n++) {                            \
     102             :             const type current = src[n];                              \
     103             :                                                                       \
     104             :             dst[n] = current + prv[0];                                \
     105             :             prv[0] = dst[n];                                          \
     106             :         }                                                             \
     107             :     }                                                                 \
     108             : }
     109             : 
     110           0 : INTEGRAL(flt, float)
     111           0 : INTEGRAL(dbl, double)
     112             : 
     113           0 : static int config_input(AVFilterLink *inlink)
     114             : {
     115           0 :     AVFilterContext *ctx = inlink->dst;
     116           0 :     ADerivativeContext *s = ctx->priv;
     117             : 
     118           0 :     switch (inlink->format) {
     119           0 :     case AV_SAMPLE_FMT_FLTP: s->filter = aderivative_fltp; break;
     120           0 :     case AV_SAMPLE_FMT_DBLP: s->filter = aderivative_dblp; break;
     121           0 :     case AV_SAMPLE_FMT_S32P: s->filter = aderivative_s32p; break;
     122           0 :     case AV_SAMPLE_FMT_S16P: s->filter = aderivative_s16p; break;
     123             :     }
     124             : 
     125           0 :     if (strcmp(ctx->filter->name, "aintegral"))
     126           0 :         return 0;
     127             : 
     128           0 :     switch (inlink->format) {
     129           0 :     case AV_SAMPLE_FMT_FLTP: s->filter = aintegral_fltp; break;
     130           0 :     case AV_SAMPLE_FMT_DBLP: s->filter = aintegral_dblp; break;
     131             :     }
     132             : 
     133           0 :     return 0;
     134             : }
     135             : 
     136           0 : static int filter_frame(AVFilterLink *inlink, AVFrame *in)
     137             : {
     138           0 :     AVFilterContext *ctx = inlink->dst;
     139           0 :     ADerivativeContext *s = ctx->priv;
     140           0 :     AVFilterLink *outlink = ctx->outputs[0];
     141           0 :     AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
     142             : 
     143           0 :     if (!out) {
     144           0 :         av_frame_free(&in);
     145           0 :         return AVERROR(ENOMEM);
     146             :     }
     147           0 :     av_frame_copy_props(out, in);
     148             : 
     149           0 :     if (!s->prev) {
     150           0 :         s->prev = ff_get_audio_buffer(inlink, 1);
     151           0 :         if (!s->prev) {
     152           0 :             av_frame_free(&in);
     153           0 :             return AVERROR(ENOMEM);
     154             :         }
     155             :     }
     156             : 
     157           0 :     s->filter((void **)out->extended_data, (void **)s->prev->extended_data, (const void **)in->extended_data,
     158           0 :               in->nb_samples, in->channels);
     159             : 
     160           0 :     av_frame_free(&in);
     161           0 :     return ff_filter_frame(outlink, out);
     162             : }
     163             : 
     164           0 : static av_cold void uninit(AVFilterContext *ctx)
     165             : {
     166           0 :     ADerivativeContext *s = ctx->priv;
     167             : 
     168           0 :     av_frame_free(&s->prev);
     169           0 : }
     170             : 
     171             : static const AVFilterPad aderivative_inputs[] = {
     172             :     {
     173             :         .name         = "default",
     174             :         .type         = AVMEDIA_TYPE_AUDIO,
     175             :         .filter_frame = filter_frame,
     176             :         .config_props = config_input,
     177             :     },
     178             :     { NULL }
     179             : };
     180             : 
     181             : static const AVFilterPad aderivative_outputs[] = {
     182             :     {
     183             :         .name = "default",
     184             :         .type = AVMEDIA_TYPE_AUDIO,
     185             :     },
     186             :     { NULL }
     187             : };
     188             : 
     189             : AVFilter ff_af_aderivative = {
     190             :     .name          = "aderivative",
     191             :     .description   = NULL_IF_CONFIG_SMALL("Compute derivative of input audio."),
     192             :     .query_formats = query_formats,
     193             :     .priv_size     = sizeof(ADerivativeContext),
     194             :     .uninit        = uninit,
     195             :     .inputs        = aderivative_inputs,
     196             :     .outputs       = aderivative_outputs,
     197             : };
     198             : 
     199             : AVFilter ff_af_aintegral = {
     200             :     .name          = "aintegral",
     201             :     .description   = NULL_IF_CONFIG_SMALL("Compute integral of input audio."),
     202             :     .query_formats = query_formats,
     203             :     .priv_size     = sizeof(ADerivativeContext),
     204             :     .uninit        = uninit,
     205             :     .inputs        = aderivative_inputs,
     206             :     .outputs       = aderivative_outputs,
     207             : };

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