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);
69 * Update the position of a link in the age heap.
71 void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link);
73 /** default handler for freeing audio/video buffer when there are no references left */
74 void ff_avfilter_default_free_buffer(AVFilterBuffer *buf);
76 /** Tell is a format is contained in the provided list terminated by -1. */
77 int ff_fmt_is_in(int fmt, const int *fmts);
80 * Return a copy of a list of integers terminated by -1, or NULL in
81 * case of copy failure.
83 int *ff_copy_int_list(const int * const list);
86 * Return a copy of a list of 64-bit integers, or NULL in case of
89 int64_t *ff_copy_int64_list(const int64_t * const list);
91 /* Functions to parse audio format arguments */
94 * Parse a pixel format.
96 * @param ret pixel format pointer to where the value should be written
97 * @param arg string to parse
98 * @param log_ctx log context
99 * @return 0 in case of success, a negative AVERROR code on error
101 int ff_parse_pixel_format(enum PixelFormat *ret, const char *arg, void *log_ctx);
104 * Parse a sample rate.
106 * @param ret unsigned integer pointer to where the value should be written
107 * @param arg string to parse
108 * @param log_ctx log context
109 * @return 0 in case of success, a negative AVERROR code on error
111 int ff_parse_sample_rate(int *ret, const char *arg, void *log_ctx);
114 * Parse a sample format name or a corresponding integer representation.
116 * @param ret integer pointer to where the value should be written
117 * @param arg string to parse
118 * @param log_ctx log context
119 * @return 0 in case of success, a negative AVERROR code on error
121 int ff_parse_sample_format(int *ret, const char *arg, void *log_ctx);
124 * Parse a channel layout or a corresponding integer representation.
126 * @param ret 64bit integer pointer to where the value should be written.
127 * @param arg string to parse
128 * @param log_ctx log context
129 * @return 0 in case of success, a negative AVERROR code on error
131 int ff_parse_channel_layout(int64_t *ret, const char *arg, void *log_ctx);
134 * Parse a packing format or a corresponding integer representation.
136 * @param ret integer pointer to where the value should be written
137 * @param arg string to parse
138 * @param log_ctx log context
139 * @return 0 in case of success, a negative AVERROR code on error
141 int ff_parse_packing_format(int *ret, const char *arg, void *log_ctx);
144 * Pass video frame along and keep an internal reference for later use.
146 static inline void ff_null_start_frame_keep_ref(AVFilterLink *inlink,
147 AVFilterBufferRef *picref)
149 avfilter_start_frame(inlink->dst->outputs[0], avfilter_ref_buffer(picref, ~0));
152 #endif /* AVFILTER_INTERNAL_H */