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];
38 typedef struct AVFilterCommand {
39 double time; ///< time expressed in seconds
40 char *command; ///< command
41 char *arg; ///< optional argument for the command
43 struct AVFilterCommand *next;
47 * Check for the validity of graph.
49 * A graph is considered valid if all its input and output pads are
52 * @return 0 in case of success, a negative value otherwise
54 int ff_avfilter_graph_check_validity(AVFilterGraph *graphctx, AVClass *log_ctx);
57 * Configure all the links of graphctx.
59 * @return 0 in case of success, a negative value otherwise
61 int ff_avfilter_graph_config_links(AVFilterGraph *graphctx, AVClass *log_ctx);
64 * Configure the formats of all the links in the graph.
66 int ff_avfilter_graph_config_formats(AVFilterGraph *graphctx, AVClass *log_ctx);
68 /** default handler for freeing audio/video buffer when there are no references left */
69 void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
71 /** Tell is a format is contained in the provided list terminated by -1. */
72 int ff_fmt_is_in(int fmt, const int *fmts);
75 * Return a copy of a list of integers terminated by -1, or NULL in
76 * case of copy failure.
78 int *ff_copy_int_list(const int * const list);
81 * Return a copy of a list of 64-bit integers, or NULL in case of
84 int64_t *ff_copy_int64_list(const int64_t * const list);
86 /* Functions to parse audio format arguments */
89 * Parse a pixel format.
91 * @param ret pixel format pointer to where the value should be written
92 * @param arg string to parse
93 * @param log_ctx log context
94 * @return 0 in case of success, a negative AVERROR code on error
96 int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx);
99 * Parse a sample rate.
101 * @param ret unsigned integer pointer to where the value should be written
102 * @param arg string to parse
103 * @param log_ctx log context
104 * @return 0 in case of success, a negative AVERROR code on error
106 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
109 * Parse a sample format name or a corresponding integer representation.
111 * @param ret integer pointer to where the value should be written
112 * @param arg string to parse
113 * @param log_ctx log context
114 * @return 0 in case of success, a negative AVERROR code on error
116 int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx);
119 * Parse a channel layout or a corresponding integer representation.
121 * @param ret 64bit integer pointer to where the value should be written.
122 * @param arg string to parse
123 * @param log_ctx log context
124 * @return 0 in case of success, a negative AVERROR code on error
126 int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx);
129 * Parse a packing format or a corresponding integer representation.
131 * @param ret integer pointer to where the value should be written
132 * @param arg string to parse
133 * @param log_ctx log context
134 * @return 0 in case of success, a negative AVERROR code on error
136 int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx);
138 #endif /* AVFILTER_INTERNAL_H */