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FFmpeg/libavfilter/af_afir.h

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  1. /*

  2.  * Copyright (c) 2017 Paul B Mahol

  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. #ifndef AVFILTER_AFIR_H

  22. #define AVFILTER_AFIR_H

  23. 

  24. #include "libavutil/audio_fifo.h"

  25. #include "libavutil/common.h"

  26. #include "libavutil/float_dsp.h"

  27. #include "libavutil/opt.h"

  28. #include "libavcodec/avfft.h"

  29. 

  30. #include "audio.h"

  31. #include "avfilter.h"

  32. #include "formats.h"

  33. #include "internal.h"

  34. 

  35. #define MAX_IR_DURATION 30

  36. 

  37. typedef struct AudioFIRContext {

  38.     const AVClass *class;

  39. 

  40.     float wet_gain;

  41.     float dry_gain;

  42.     float length;

  43.     int again;

  44. 

  45.     float gain;

  46. 

  47.     int eof_coeffs;

  48.     int have_coeffs;

  49.     int nb_coeffs;

  50.     int nb_taps;

  51.     int part_size;

  52.     int part_index;

  53.     int coeff_size;

  54.     int block_size;

  55.     int nb_partitions;

  56.     int nb_channels;

  57.     int ir_length;

  58.     int fft_length;

  59.     int nb_coef_channels;

  60.     int one2many;

  61.     int nb_samples;

  62.     int want_skip;

  63.     int need_padding;

  64. 

  65.     RDFTContext **rdft, **irdft;

  66.     float **sum;

  67.     float **block;

  68.     FFTComplex **coeff;

  69. 

  70.     AVAudioFifo *fifo[2];

  71.     AVFrame *in[2];

  72.     AVFrame *buffer;

  73.     int64_t pts;

  74.     int index;

  75. 

  76.     AVFloatDSPContext *fdsp;

  77.     void (*fcmul_add)(float *sum, const float *t, const float *c,

  78.                       ptrdiff_t len);

  79. } AudioFIRContext;

  80. 

  81. void ff_afir_init_x86(AudioFIRContext *s);

  82. 

  83. #endif /* AVFILTER_AFIR_H */