/*

  * Copyright (c) Stefano Sabatini | stefasab at gmail.com
  * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu

  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #ifndef AVFILTER_AUDIO_H
 #define AVFILTER_AUDIO_H
 
 #include "avfilter.h"

 #include "internal.h"

 static const enum AVSampleFormat ff_packed_sample_fmts_array[] = {

     AV_SAMPLE_FMT_U8,
     AV_SAMPLE_FMT_S16,
     AV_SAMPLE_FMT_S32,
     AV_SAMPLE_FMT_FLT,
     AV_SAMPLE_FMT_DBL,
     AV_SAMPLE_FMT_NONE
 };
 

 static const enum AVSampleFormat ff_planar_sample_fmts_array[] = {

     AV_SAMPLE_FMT_U8P,
     AV_SAMPLE_FMT_S16P,
     AV_SAMPLE_FMT_S32P,
     AV_SAMPLE_FMT_FLTP,
     AV_SAMPLE_FMT_DBLP,
     AV_SAMPLE_FMT_NONE
 };

 /** default handler for get_audio_buffer() for audio inputs */

 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples);

 
 /** get_audio_buffer() handler for filters which simply pass audio along */

 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples);

 
 /**
  * Request an audio samples buffer with a specific set of permissions.
  *
  * @param link           the output link to the filter from which the buffer will
  *                       be requested
  * @param nb_samples     the number of samples per channel
  * @return               A reference to the samples. This must be unreferenced with
  *                       avfilter_unref_buffer when you are finished with it.
  */

 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples);

 
 #endif /* AVFILTER_AUDIO_H */