2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVFILTER_INTERNAL_H
20 #define AVFILTER_INTERNAL_H
24 * internal API functions
28 #include "avfiltergraph.h"
31 typedef struct AVFilterPool {
32 AVFilterBufferRef *pic[POOL_SIZE];
36 typedef struct AVFilterCommand {
37 double time; ///< time expressed in seconds
38 char *command; ///< command
39 char *arg; ///< optional argument for the command
41 struct AVFilterCommand *next;
45 * Check for the validity of graph.
47 * A graph is considered valid if all its input and output pads are
50 * @return 0 in case of success, a negative value otherwise
52 int ff_avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
55 * Configure all the links of graphctx.
57 * @return 0 in case of success, a negative value otherwise
59 int ff_avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
62 * Configure the formats of all the links in the graph.
64 int ff_avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
66 /** default handler for freeing audio/video buffer when there are no references left */
67 void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
69 /** Tell is a format is contained in the provided list terminated by -1. */
70 int ff_fmt_is_in(int fmt, const int *fmts);
72 /* Functions to parse audio format arguments */
75 * Parse a pixel format.
77 * @param ret pixel format pointer to where the value should be written
78 * @param arg string to parse
79 * @param log_ctx log context
80 * @return 0 in case of success, a negative AVERROR code on error
82 int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx);
85 * Parse a sample rate.
87 * @param ret unsigned integer pointer to where the value should be written
88 * @param arg string to parse
89 * @param log_ctx log context
90 * @return 0 in case of success, a negative AVERROR code on error
92 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
95 * Parse a sample format name or a corresponding integer representation.
97 * @param ret integer pointer to where the value should be written
98 * @param arg string to parse
99 * @param log_ctx log context
100 * @return 0 in case of success, a negative AVERROR code on error
102 int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx);
105 * Parse a channel layout or a corresponding integer representation.
107 * @param ret 64bit integer pointer to where the value should be written.
108 * @param arg string to parse
109 * @param log_ctx log context
110 * @return 0 in case of success, a negative AVERROR code on error
112 int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx);
115 * Parse a packing format or a corresponding integer representation.
117 * @param ret integer pointer to where the value should be written
118 * @param arg string to parse
119 * @param log_ctx log context
120 * @return 0 in case of success, a negative AVERROR code on error
122 int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx);
124 #endif /* AVFILTER_INTERNAL_H */