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75 lines
2.7 KiB
75 lines
2.7 KiB
/* |
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* Copyright (c) Stefano Sabatini | stefasab at gmail.com |
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* Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVFILTER_AUDIO_H |
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#define AVFILTER_AUDIO_H |
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#include "avfilter.h" |
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#include "filters.h" |
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/** |
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* An AVFilterPad array whose only entry has name "default" |
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* and is of type AVMEDIA_TYPE_AUDIO. |
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*/ |
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extern const AVFilterPad ff_audio_default_filterpad[1]; |
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/** default handler for get_audio_buffer() for audio inputs */ |
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AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples); |
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/** get_audio_buffer() handler for filters which simply pass audio along */ |
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AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples); |
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/** |
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* Request an audio samples buffer with a specific set of permissions. |
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* |
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* @param link the output link to the filter from which the buffer will |
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* be requested |
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* @param nb_samples the number of samples per channel |
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* @return on success an AVFrame owned by the caller, NULL on error |
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*/ |
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AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples); |
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/** |
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* Parse a sample rate. |
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* |
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* @param ret unsigned integer pointer to where the value should be written |
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* @param arg string to parse |
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* @param log_ctx log context |
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* @return >= 0 in case of success, a negative AVERROR code on error |
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*/ |
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av_warn_unused_result |
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int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx); |
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/** |
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* Parse a channel layout or a corresponding integer representation. |
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* |
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* @param ret 64bit integer pointer to where the value should be written. |
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* @param nret integer pointer to the number of channels; |
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* if not NULL, then unknown channel layouts are accepted |
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* @param arg string to parse |
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* @param log_ctx log context |
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* @return >= 0 in case of success, a negative AVERROR code on error |
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*/ |
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av_warn_unused_result |
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int ff_parse_channel_layout(AVChannelLayout *ret, int *nret, const char *arg, |
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void *log_ctx); |
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#endif /* AVFILTER_AUDIO_H */
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