libavfilter/audio.h

   1 /*
   2  * This file is part of Libav.
   3  *
   4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17  */
  18
  19 #ifndef AVFILTER_AUDIO_H
  20 #define AVFILTER_AUDIO_H
  21
  22 #include "avfilter.h"
  23
  24 /** default handler for get_audio_buffer() for audio inputs */
  25 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples);
  26
  27 /** get_audio_buffer() handler for filters which simply pass audio along */
  28 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples);
  29
  30 /**
  31  * Request an audio samples buffer with a specific set of permissions.
  32  *
  33  * @param link           the output link to the filter from which the buffer will
  34  *                       be requested
  35  * @param nb_samples     the number of samples per channel
  36  * @return               A reference to the samples. This must be unreferenced with
  37  *                       avfilter_unref_buffer when you are finished with it.
  38  */
  39 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples);
  40
  41 #endif /* AVFILTER_AUDIO_H */