/* * 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 */