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/*
* 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_INTERNAL_H
#define AVFILTER_INTERNAL_H
/**
* @file
* internal API functions
*/
#include "avfilter.h"
#include "avfiltergraph.h"
#define POOL_SIZE 32
typedef struct AVFilterPool {
AVFilterBufferRef *pic[POOL_SIZE];
int count;
int refcount;
int draining;
} AVFilterPool;
typedef struct AVFilterCommand {
double time; ///< time expressed in seconds
char *command; ///< command
char *arg; ///< optional argument for the command
int flags;
struct AVFilterCommand *next;
} AVFilterCommand;
/**
* Check for the validity of graph.
*
* A graph is considered valid if all its input and output pads are
* connected.
*
* @return 0 in case of success, a negative value otherwise
*/
int ff_avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
/**
* Configure all the links of graphctx.
*
* @return 0 in case of success, a negative value otherwise
*/
int ff_avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
/**
* Configure the formats of all the links in the graph.
*/
int ff_avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
/**
* Update the position of a link in the age heap.
*/
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link);
/** default handler for freeing audio/video buffer when there are no references left */
void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
/** Tell is a format is contained in the provided list terminated by -1. */
int ff_fmt_is_in(int fmt, const int *fmts);
/**
* Return a copy of a list of integers terminated by -1, or NULL in
* case of copy failure.
*/
int *ff_copy_int_list(const int * const list);
/**
* Return a copy of a list of 64-bit integers, or NULL in case of
* copy failure.
*/
int64_t *ff_copy_int64_list(const int64_t * const list);
/* Functions to parse audio format arguments */
/**
* Parse a pixel format.
*
* @param ret pixel format pointer to where the value should be written
* @param arg string to parse
* @param log_ctx log context
* @return 0 in case of success, a negative AVERROR code on error
*/
int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx);
/**
* Parse a sample rate.
*
* @param ret unsigned integer pointer to where the value should be written
* @param arg string to parse
* @param log_ctx log context
* @return 0 in case of success, a negative AVERROR code on error
*/
int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
/**
* Parse a sample format name or a corresponding integer representation.
*
* @param ret integer pointer to where the value should be written
* @param arg string to parse
* @param log_ctx log context
* @return 0 in case of success, a negative AVERROR code on error
*/
int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx);
/**
* Parse a channel layout or a corresponding integer representation.
*
* @param ret 64bit integer pointer to where the value should be written.
* @param arg string to parse
* @param log_ctx log context
* @return 0 in case of success, a negative AVERROR code on error
*/
int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx);
/**
* Parse a packing format or a corresponding integer representation.
*
* @param ret integer pointer to where the value should be written
* @param arg string to parse
* @param log_ctx log context
* @return 0 in case of success, a negative AVERROR code on error
*/
int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx);
/**
* Pass video frame along and keep an internal reference for later use.
*/
static inline void ff_null_start_frame_keep_ref(AVFilterLink *inlink,
AVFilterBufferRef *picref)
{
avfilter_start_frame(inlink->dst->outputs[0], avfilter_ref_buffer(picref, ~0));
}
#endif /* AVFILTER_INTERNAL_H */
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