yading@10: /*
yading@10:  * Copyright (c) Stefano Sabatini | stefasab at gmail.com
yading@10:  * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #ifndef AVFILTER_AUDIO_H
yading@10: #define AVFILTER_AUDIO_H
yading@10: 
yading@10: #include "avfilter.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: static const enum AVSampleFormat ff_packed_sample_fmts_array[] = {
yading@10:     AV_SAMPLE_FMT_U8,
yading@10:     AV_SAMPLE_FMT_S16,
yading@10:     AV_SAMPLE_FMT_S32,
yading@10:     AV_SAMPLE_FMT_FLT,
yading@10:     AV_SAMPLE_FMT_DBL,
yading@10:     AV_SAMPLE_FMT_NONE
yading@10: };
yading@10: 
yading@10: static const enum AVSampleFormat ff_planar_sample_fmts_array[] = {
yading@10:     AV_SAMPLE_FMT_U8P,
yading@10:     AV_SAMPLE_FMT_S16P,
yading@10:     AV_SAMPLE_FMT_S32P,
yading@10:     AV_SAMPLE_FMT_FLTP,
yading@10:     AV_SAMPLE_FMT_DBLP,
yading@10:     AV_SAMPLE_FMT_NONE
yading@10: };
yading@10: 
yading@10: /** default handler for get_audio_buffer() for audio inputs */
yading@10: AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples);
yading@10: 
yading@10: /** get_audio_buffer() handler for filters which simply pass audio along */
yading@10: AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples);
yading@10: 
yading@10: /**
yading@10:  * Request an audio samples buffer with a specific set of permissions.
yading@10:  *
yading@10:  * @param link           the output link to the filter from which the buffer will
yading@10:  *                       be requested
yading@10:  * @param nb_samples     the number of samples per channel
yading@10:  * @return               A reference to the samples. This must be unreferenced with
yading@10:  *                       avfilter_unref_buffer when you are finished with it.
yading@10:  */
yading@10: AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples);
yading@10: 
yading@10: /**
yading@10:  * Send a buffer of audio samples to the next filter.
yading@10:  *
yading@10:  * @param link       the output link over which the audio samples are being sent
yading@10:  * @param samplesref a reference to the buffer of audio samples being sent. The
yading@10:  *                   receiving filter will free this reference when it no longer
yading@10:  *                   needs it or pass it on to the next filter.
yading@10:  *
yading@10:  * @return >= 0 on success, a negative AVERROR on error. The receiving filter
yading@10:  * is responsible for unreferencing samplesref in case of error.
yading@10:  */
yading@10: int ff_filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref);
yading@10: 
yading@10: /**
yading@10:  * Send a buffer of audio samples to the next link, without checking
yading@10:  * min_samples.
yading@10:  */
yading@10: int ff_filter_samples_framed(AVFilterLink *link,
yading@10:                              AVFilterBufferRef *samplesref);
yading@10: 
yading@10: #endif /* AVFILTER_AUDIO_H */