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1afe42852b
internal.h currently mixes interfaces intended to be used by filters with those that should be limited to generic filter- or graph-level code.
98 lines
3.0 KiB
C
98 lines
3.0 KiB
C
/*
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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_INTERNAL_H
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#define AVFILTER_INTERNAL_H
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/**
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* @file
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* internal API functions
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*/
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#include "libavutil/internal.h"
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#include "avfilter.h"
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/**
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* Returns true if a pixel format is "regular YUV", which includes all pixel
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* formats that are affected by YUV colorspace negotiation.
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*/
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int ff_fmt_is_regular_yuv(enum AVPixelFormat fmt);
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/* Functions to parse audio format arguments */
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/**
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* Parse a pixel format.
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*
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* @param ret pixel format 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_pixel_format(enum AVPixelFormat *ret, const char *arg, void *log_ctx);
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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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/**
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* Negotiate the media format, dimensions, etc of all inputs to a filter.
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*
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* @param filter the filter to negotiate the properties for its inputs
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* @return zero on successful negotiation
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*/
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int ff_filter_config_links(AVFilterContext *filter);
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/* misc trace functions */
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#define FF_TPRINTF_START(ctx, func) ff_tlog(NULL, "%-16s: ", #func)
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#ifdef TRACE
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void ff_tlog_link(void *ctx, AVFilterLink *link, int end);
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#else
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#define ff_tlog_link(ctx, link, end) do { } while(0)
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#endif
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/**
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* Run one round of processing on a filter graph.
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*/
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int ff_filter_graph_run_once(AVFilterGraph *graph);
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#endif /* AVFILTER_INTERNAL_H */
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