/src/ffmpeg/libavutil/avutil.h

Source
/*
 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
 *
 * 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 AVUTIL_AVUTIL_H
#define AVUTIL_AVUTIL_H

/**
 * @file
 * @ingroup lavu
 * Convenience header that includes @ref lavu "libavutil"'s core.
 */

/**
 * @mainpage
 *
 * @section ffmpeg_intro Introduction
 *
 * This document describes the usage of the different libraries
 * provided by FFmpeg.
 *
 * @li @ref libavc "libavcodec" encoding/decoding library
 * @li @ref lavfi "libavfilter" graph-based frame editing library
 * @li @ref libavf "libavformat" I/O and muxing/demuxing library
 * @li @ref lavd "libavdevice" special devices muxing/demuxing library
 * @li @ref lavu "libavutil" common utility library
 * @li @ref lswr "libswresample" audio resampling, format conversion and mixing
 * @li @ref libsws "libswscale" color conversion and scaling library
 *
 * @section ffmpeg_versioning Versioning and compatibility
 *
 * Each of the FFmpeg libraries contains a version.h header, which defines a
 * major, minor and micro version number with the
 * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
 * number is incremented with backward incompatible changes - e.g. removing
 * parts of the public API, reordering public struct members, etc. The minor
 * version number is incremented for backward compatible API changes or major
 * new features - e.g. adding a new public function or a new decoder. The micro
 * version number is incremented for smaller changes that a calling program
 * might still want to check for - e.g. changing behavior in a previously
 * unspecified situation.
 *
 * FFmpeg guarantees backward API and ABI compatibility for each library as long
 * as its major version number is unchanged. This means that no public symbols
 * will be removed or renamed. Types and names of the public struct members and
 * values of public macros and enums will remain the same (unless they were
 * explicitly declared as not part of the public API). Documented behavior will
 * not change.
 *
 * In other words, any correct program that works with a given FFmpeg snapshot
 * should work just as well without any changes with any later snapshot with the
 * same major versions. This applies to both rebuilding the program against new
 * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
 * links against.
 *
 * However, new public symbols may be added and new members may be appended to
 * public structs whose size is not part of public ABI (most public structs in
 * FFmpeg). New macros and enum values may be added. Behavior in undocumented
 * situations may change slightly (and be documented). All those are accompanied
 * by an entry in doc/APIchanges and incrementing either the minor or micro
 * version number.
 */

/**
 * @defgroup lavu libavutil
 * Common code shared across all FFmpeg libraries.
 *
 * @note
 * libavutil is designed to be modular. In most cases, in order to use the
 * functions provided by one component of libavutil you must explicitly include
 * the specific header containing that feature. If you are only using
 * media-related components, you could simply include libavutil/avutil.h, which
 * brings in most of the "core" components.
 *
 * @{
 *
 * @defgroup lavu_crypto Crypto and Hashing
 *
 * @{
 * @}
 *
 * @defgroup lavu_math Mathematics
 * @{
 *
 * @}
 *
 * @defgroup lavu_string String Manipulation
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_mem Memory Management
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_data Data Structures
 * @{
 *
 * @}
 *
 * @defgroup lavu_video Video related
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_audio Audio related
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_error Error Codes
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_log Logging Facility
 *
 * @{
 *
 * @}
 *
 * @defgroup lavu_misc Other
 *
 * @{
 *
 * @defgroup preproc_misc Preprocessor String Macros
 *
 * @{
 *
 * @}
 *
 * @defgroup version_utils Library Version Macros
 *
 * @{
 *
 * @}
 */


/**
 * @addtogroup lavu_ver
 * @{
 */

/**
 * Return the LIBAVUTIL_VERSION_INT constant.
 */
unsigned avutil_version(void);

/**
 * Return an informative version string. This usually is the actual release
 * version number or a git commit description. This string has no fixed format
 * and can change any time. It should never be parsed by code.
 */
const char *av_version_info(void);

/**
 * Return the libavutil build-time configuration.
 */
const char *avutil_configuration(void);

/**
 * Return the libavutil license.
 */
const char *avutil_license(void);

/**
 * @}
 */

/**
 * @addtogroup lavu_media Media Type
 * @brief Media Type
 */

enum AVMediaType {
    AVMEDIA_TYPE_UNKNOWN = -1,  ///< Usually treated as AVMEDIA_TYPE_DATA
    AVMEDIA_TYPE_VIDEO,
    AVMEDIA_TYPE_AUDIO,
    AVMEDIA_TYPE_DATA,          ///< Opaque data information usually continuous
    AVMEDIA_TYPE_SUBTITLE,
    AVMEDIA_TYPE_ATTACHMENT,    ///< Opaque data information usually sparse
    AVMEDIA_TYPE_NB
};

/**
 * Return a string describing the media_type enum, NULL if media_type
 * is unknown.
 */
const char *av_get_media_type_string(enum AVMediaType media_type);

/**
 * @defgroup lavu_const Constants
 * @{
 *
 * @defgroup lavu_enc Encoding specific
 *
 * @note those definition should move to avcodec
 * @{
 */

#define FF_LAMBDA_SHIFT 7
#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
#define FF_LAMBDA_MAX (256*128-1)

#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove

/**
 * @}
 * @defgroup lavu_time Timestamp specific
 *
 * FFmpeg internal timebase and timestamp definitions
 *
 * @{
 */

/**
 * @brief Undefined timestamp value
 *
 * Usually reported by demuxer that work on containers that do not provide
 * either pts or dts.
 */

#define AV_NOPTS_VALUE          ((int64_t)UINT64_C(0x8000000000000000))

/**
 * Internal time base represented as integer
 */

#define AV_TIME_BASE            1000000

/**
 * Internal time base represented as fractional value
 */

#ifdef __cplusplus
/* ISO C++ forbids compound-literals. */
#define AV_TIME_BASE_Q          av_make_q(1, AV_TIME_BASE)
#else
#define AV_TIME_BASE_Q          (AVRational){1, AV_TIME_BASE}
#endif

/**
 * @}
 * @}
 * @defgroup lavu_picture Image related
 *
 * AVPicture types, pixel formats and basic image planes manipulation.
 *
 * @{
 */

enum AVPictureType {
    AV_PICTURE_TYPE_NONE = 0, ///< Undefined
    AV_PICTURE_TYPE_I,     ///< Intra
    AV_PICTURE_TYPE_P,     ///< Predicted
    AV_PICTURE_TYPE_B,     ///< Bi-dir predicted
    AV_PICTURE_TYPE_S,     ///< S(GMC)-VOP MPEG-4
    AV_PICTURE_TYPE_SI,    ///< Switching Intra
    AV_PICTURE_TYPE_SP,    ///< Switching Predicted
    AV_PICTURE_TYPE_BI,    ///< BI type
};

/**
 * Return a single letter to describe the given picture type
 * pict_type.
 *
 * @param[in] pict_type the picture type @return a single character
 * representing the picture type, '?' if pict_type is unknown
 */
char av_get_picture_type_char(enum AVPictureType pict_type);

/**
 * @}
 */

#include "common.h"
#include "rational.h"
#include "version.h"
#include "macros.h"
#include "mathematics.h"
#include "log.h"
#include "pixfmt.h"

/**
 * Return x default pointer in case p is NULL.
 */
static inline void *av_x_if_null(const void *p, const void *x)
{
    return (void *)(intptr_t)(p ? p : x);
}

#if FF_API_OPT_INT_LIST
/**
 * Compute the length of an integer list.
 *
 * @param elsize  size in bytes of each list element (only 1, 2, 4 or 8)
 * @param term    list terminator (usually 0 or -1)
 * @param list    pointer to the list
 * @return  length of the list, in elements, not counting the terminator
 */
attribute_deprecated
unsigned av_int_list_length_for_size(unsigned elsize,
                                     const void *list, uint64_t term) av_pure;

/**
 * Compute the length of an integer list.
 *
 * @param term  list terminator (usually 0 or -1)
 * @param list  pointer to the list
 * @return  length of the list, in elements, not counting the terminator
 */
#define av_int_list_length(list, term) \
    av_int_list_length_for_size(sizeof(*(list)), list, term)
#endif

/**
 * Return the fractional representation of the internal time base.
 */
AVRational av_get_time_base_q(void);

#define AV_FOURCC_MAX_STRING_SIZE 32

#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)

/**
 * Fill the provided buffer with a string containing a FourCC (four-character
 * code) representation.
 *
 * @param buf    a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE
 * @param fourcc the fourcc to represent
 * @return the buffer in input
 */
char *av_fourcc_make_string(char *buf, uint32_t fourcc);

/**
 * @}
 * @}
 */

#endif /* AVUTIL_AVUTIL_H */

Coverage Report

Created: 2026-01-25 07:18

Line	Count	Source
1		/*
2		* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3		*
4		* This file is part of FFmpeg.
5		*
6		* FFmpeg is free software; you can redistribute it and/or
7		* modify it under the terms of the GNU Lesser General Public
8		* License as published by the Free Software Foundation; either
9		* version 2.1 of the License, or (at your option) any later version.
10		*
11		* FFmpeg is distributed in the hope that it will be useful,
12		* but WITHOUT ANY WARRANTY; without even the implied warranty of
13		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14		* Lesser General Public License for more details.
15		*
16		* You should have received a copy of the GNU Lesser General Public
17		* License along with FFmpeg; if not, write to the Free Software
18		* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19		*/
20
21		#ifndef AVUTIL_AVUTIL_H
22		#define AVUTIL_AVUTIL_H
23
24		/**
25		* @file
26		* @ingroup lavu
27		* Convenience header that includes @ref lavu "libavutil"'s core.
28		*/
29
30		/**
31		* @mainpage
32		*
33		* @section ffmpeg_intro Introduction
34		*
35		* This document describes the usage of the different libraries
36		* provided by FFmpeg.
37		*
38		* @li @ref libavc "libavcodec" encoding/decoding library
39		* @li @ref lavfi "libavfilter" graph-based frame editing library
40		* @li @ref libavf "libavformat" I/O and muxing/demuxing library
41		* @li @ref lavd "libavdevice" special devices muxing/demuxing library
42		* @li @ref lavu "libavutil" common utility library
43		* @li @ref lswr "libswresample" audio resampling, format conversion and mixing
44		* @li @ref libsws "libswscale" color conversion and scaling library
45		*
46		* @section ffmpeg_versioning Versioning and compatibility
47		*
48		* Each of the FFmpeg libraries contains a version.h header, which defines a
49		* major, minor and micro version number with the
50		* <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version
51		* number is incremented with backward incompatible changes - e.g. removing
52		* parts of the public API, reordering public struct members, etc. The minor
53		* version number is incremented for backward compatible API changes or major
54		* new features - e.g. adding a new public function or a new decoder. The micro
55		* version number is incremented for smaller changes that a calling program
56		* might still want to check for - e.g. changing behavior in a previously
57		* unspecified situation.
58		*
59		* FFmpeg guarantees backward API and ABI compatibility for each library as long
60		* as its major version number is unchanged. This means that no public symbols
61		* will be removed or renamed. Types and names of the public struct members and
62		* values of public macros and enums will remain the same (unless they were
63		* explicitly declared as not part of the public API). Documented behavior will
64		* not change.
65		*
66		* In other words, any correct program that works with a given FFmpeg snapshot
67		* should work just as well without any changes with any later snapshot with the
68		* same major versions. This applies to both rebuilding the program against new
69		* FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program
70		* links against.
71		*
72		* However, new public symbols may be added and new members may be appended to
73		* public structs whose size is not part of public ABI (most public structs in
74		* FFmpeg). New macros and enum values may be added. Behavior in undocumented
75		* situations may change slightly (and be documented). All those are accompanied
76		* by an entry in doc/APIchanges and incrementing either the minor or micro
77		* version number.
78		*/
79
80		/**
81		* @defgroup lavu libavutil
82		* Common code shared across all FFmpeg libraries.
83		*
84		* @note
85		* libavutil is designed to be modular. In most cases, in order to use the
86		* functions provided by one component of libavutil you must explicitly include
87		* the specific header containing that feature. If you are only using
88		* media-related components, you could simply include libavutil/avutil.h, which
89		* brings in most of the "core" components.
90		*
91		* @{
92		*
93		* @defgroup lavu_crypto Crypto and Hashing
94		*
95		* @{
96		* @}
97		*
98		* @defgroup lavu_math Mathematics
99		* @{
100		*
101		* @}
102		*
103		* @defgroup lavu_string String Manipulation
104		*
105		* @{
106		*
107		* @}
108		*
109		* @defgroup lavu_mem Memory Management
110		*
111		* @{
112		*
113		* @}
114		*
115		* @defgroup lavu_data Data Structures
116		* @{
117		*
118		* @}
119		*
120		* @defgroup lavu_video Video related
121		*
122		* @{
123		*
124		* @}
125		*
126		* @defgroup lavu_audio Audio related
127		*
128		* @{
129		*
130		* @}
131		*
132		* @defgroup lavu_error Error Codes
133		*
134		* @{
135		*
136		* @}
137		*
138		* @defgroup lavu_log Logging Facility
139		*
140		* @{
141		*
142		* @}
143		*
144		* @defgroup lavu_misc Other
145		*
146		* @{
147		*
148		* @defgroup preproc_misc Preprocessor String Macros
149		*
150		* @{
151		*
152		* @}
153		*
154		* @defgroup version_utils Library Version Macros
155		*
156		* @{
157		*
158		* @}
159		*/
160
161
162		/**
163		* @addtogroup lavu_ver
164		* @{
165		*/
166
167		/**
168		* Return the LIBAVUTIL_VERSION_INT constant.
169		*/
170		unsigned avutil_version(void);
171
172		/**
173		* Return an informative version string. This usually is the actual release
174		* version number or a git commit description. This string has no fixed format
175		* and can change any time. It should never be parsed by code.
176		*/
177		const char *av_version_info(void);
178
179		/**
180		* Return the libavutil build-time configuration.
181		*/
182		const char *avutil_configuration(void);
183
184		/**
185		* Return the libavutil license.
186		*/
187		const char *avutil_license(void);
188
189		/**
190		* @}
191		*/
192
193		/**
194		* @addtogroup lavu_media Media Type
195		* @brief Media Type
196		*/
197
198		enum AVMediaType {
199		AVMEDIA_TYPE_UNKNOWN = -1, ///< Usually treated as AVMEDIA_TYPE_DATA
200		AVMEDIA_TYPE_VIDEO,
201		AVMEDIA_TYPE_AUDIO,
202		AVMEDIA_TYPE_DATA, ///< Opaque data information usually continuous
203		AVMEDIA_TYPE_SUBTITLE,
204		AVMEDIA_TYPE_ATTACHMENT, ///< Opaque data information usually sparse
205		AVMEDIA_TYPE_NB
206		};
207
208		/**
209		* Return a string describing the media_type enum, NULL if media_type
210		* is unknown.
211		*/
212		const char *av_get_media_type_string(enum AVMediaType media_type);
213
214		/**
215		* @defgroup lavu_const Constants
216		* @{
217		*
218		* @defgroup lavu_enc Encoding specific
219		*
220		* @note those definition should move to avcodec
221		* @{
222		*/
223
224		#define FF_LAMBDA_SHIFT 7
225		#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)
226		#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda
227		#define FF_LAMBDA_MAX (256*128-1)
228
229		#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove
230
231		/**
232		* @}
233		* @defgroup lavu_time Timestamp specific
234		*
235		* FFmpeg internal timebase and timestamp definitions
236		*
237		* @{
238		*/
239
240		/**
241		* @brief Undefined timestamp value
242		*
243		* Usually reported by demuxer that work on containers that do not provide
244		* either pts or dts.
245		*/
246
247	10.9k	#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))
248
249		/**
250		* Internal time base represented as integer
251		*/
252
253	0	#define AV_TIME_BASE 1000000
254
255		/**
256		* Internal time base represented as fractional value
257		*/
258
259		#ifdef __cplusplus
260		/* ISO C++ forbids compound-literals. */
261		#define AV_TIME_BASE_Q av_make_q(1, AV_TIME_BASE)
262		#else
263	0	#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}
264		#endif
265
266		/**
267		* @}
268		* @}
269		* @defgroup lavu_picture Image related
270		*
271		* AVPicture types, pixel formats and basic image planes manipulation.
272		*
273		* @{
274		*/
275
276		enum AVPictureType {
277		AV_PICTURE_TYPE_NONE = 0, ///< Undefined
278		AV_PICTURE_TYPE_I, ///< Intra
279		AV_PICTURE_TYPE_P, ///< Predicted
280		AV_PICTURE_TYPE_B, ///< Bi-dir predicted
281		AV_PICTURE_TYPE_S, ///< S(GMC)-VOP MPEG-4
282		AV_PICTURE_TYPE_SI, ///< Switching Intra
283		AV_PICTURE_TYPE_SP, ///< Switching Predicted
284		AV_PICTURE_TYPE_BI, ///< BI type
285		};
286
287		/**
288		* Return a single letter to describe the given picture type
289		* pict_type.
290		*
291		* @param[in] pict_type the picture type @return a single character
292		* representing the picture type, '?' if pict_type is unknown
293		*/
294		char av_get_picture_type_char(enum AVPictureType pict_type);
295
296		/**
297		* @}
298		*/
299
300		#include "common.h"
301		#include "rational.h"
302		#include "version.h"
303		#include "macros.h"
304		#include "mathematics.h"
305		#include "log.h"
306		#include "pixfmt.h"
307
308		/**
309		* Return x default pointer in case p is NULL.
310		*/
311		static inline void av_x_if_null(const void p, const void *x)
312	0	{
313	0	return (void *)(intptr_t)(p ? p : x);
314	0	} Unexecuted instantiation: avfiltergraph.c:av_x_if_null Unexecuted instantiation: buffersink.c:av_x_if_null Unexecuted instantiation: buffersrc.c:av_x_if_null Unexecuted instantiation: formats.c:av_x_if_null Unexecuted instantiation: framequeue.c:av_x_if_null Unexecuted instantiation: graphparser.c:av_x_if_null Unexecuted instantiation: pthread.c:av_x_if_null Unexecuted instantiation: video.c:av_x_if_null Unexecuted instantiation: allfilters.c:av_x_if_null Unexecuted instantiation: avfilter.c:av_x_if_null Unexecuted instantiation: framepool.c:av_x_if_null Unexecuted instantiation: audio.c:av_x_if_null Unexecuted instantiation: swscale.c:av_x_if_null Unexecuted instantiation: utils.c:av_x_if_null Unexecuted instantiation: vscale.c:av_x_if_null Unexecuted instantiation: hscale_fast_bilinear_simd.c:av_x_if_null Unexecuted instantiation: yuv2rgb.c:av_x_if_null Unexecuted instantiation: alphablend.c:av_x_if_null Unexecuted instantiation: format.c:av_x_if_null Unexecuted instantiation: graph.c:av_x_if_null Unexecuted instantiation: hscale_fast_bilinear.c:av_x_if_null Unexecuted instantiation: input.c:av_x_if_null Unexecuted instantiation: lut3d.c:av_x_if_null Unexecuted instantiation: ops.c:av_x_if_null Unexecuted instantiation: ops_backend.c:av_x_if_null Unexecuted instantiation: ops_chain.c:av_x_if_null Unexecuted instantiation: ops_memcpy.c:av_x_if_null Unexecuted instantiation: ops_optimizer.c:av_x_if_null Unexecuted instantiation: options.c:av_x_if_null Unexecuted instantiation: output.c:av_x_if_null Unexecuted instantiation: rgb2rgb.c:av_x_if_null Unexecuted instantiation: slice.c:av_x_if_null Unexecuted instantiation: swscale_unscaled.c:av_x_if_null Unexecuted instantiation: cms.c:av_x_if_null Unexecuted instantiation: csputils.c:av_x_if_null Unexecuted instantiation: gamma.c:av_x_if_null Unexecuted instantiation: hscale.c:av_x_if_null Unexecuted instantiation: avformat.c:av_x_if_null Unexecuted instantiation: demux.c:av_x_if_null Unexecuted instantiation: demux_utils.c:av_x_if_null Unexecuted instantiation: id3v2.c:av_x_if_null Unexecuted instantiation: metadata.c:av_x_if_null Unexecuted instantiation: seek.c:av_x_if_null Unexecuted instantiation: allformats.c:av_x_if_null Unexecuted instantiation: avio.c:av_x_if_null Unexecuted instantiation: aviobuf.c:av_x_if_null Unexecuted instantiation: id3v1.c:av_x_if_null Unexecuted instantiation: network.c:av_x_if_null Unexecuted instantiation: os_support.c:av_x_if_null Unexecuted instantiation: allcodecs.c:av_x_if_null Unexecuted instantiation: avcodec.c:av_x_if_null Unexecuted instantiation: bitstream_filters.c:av_x_if_null Unexecuted instantiation: bsf.c:av_x_if_null Unexecuted instantiation: codec_desc.c:av_x_if_null Unexecuted instantiation: codec_par.c:av_x_if_null Unexecuted instantiation: decode.c:av_x_if_null Unexecuted instantiation: encode.c:av_x_if_null Unexecuted instantiation: exif.c:av_x_if_null Unexecuted instantiation: get_buffer.c:av_x_if_null Unexecuted instantiation: packet.c:av_x_if_null Unexecuted instantiation: parser.c:av_x_if_null Unexecuted instantiation: parsers.c:av_x_if_null Unexecuted instantiation: profiles.c:av_x_if_null Unexecuted instantiation: pthread_frame.c:av_x_if_null Unexecuted instantiation: pthread_slice.c:av_x_if_null Unexecuted instantiation: raw.c:av_x_if_null Unexecuted instantiation: threadprogress.c:av_x_if_null Unexecuted instantiation: to_upper4.c:av_x_if_null Unexecuted instantiation: channel_layout.c:av_x_if_null Unexecuted instantiation: container_fifo.c:av_x_if_null Unexecuted instantiation: cpu.c:av_x_if_null Unexecuted instantiation: eval.c:av_x_if_null Unexecuted instantiation: frame.c:av_x_if_null Unexecuted instantiation: hwcontext.c:av_x_if_null Unexecuted instantiation: iamf.c:av_x_if_null Unexecuted instantiation: mastering_display_metadata.c:av_x_if_null Unexecuted instantiation: mathematics.c:av_x_if_null Unexecuted instantiation: opt.c:av_x_if_null Unexecuted instantiation: parseutils.c:av_x_if_null Unexecuted instantiation: side_data.c:av_x_if_null Unexecuted instantiation: timestamp.c:av_x_if_null Unexecuted instantiation: file_open.c:av_x_if_null
315
316		#if FF_API_OPT_INT_LIST
317		/**
318		* Compute the length of an integer list.
319		*
320		* @param elsize size in bytes of each list element (only 1, 2, 4 or 8)
321		* @param term list terminator (usually 0 or -1)
322		* @param list pointer to the list
323		* @return length of the list, in elements, not counting the terminator
324		*/
325		attribute_deprecated
326		unsigned av_int_list_length_for_size(unsigned elsize,
327		const void *list, uint64_t term) av_pure;
328
329		/**
330		* Compute the length of an integer list.
331		*
332		* @param term list terminator (usually 0 or -1)
333		* @param list pointer to the list
334		* @return length of the list, in elements, not counting the terminator
335		*/
336		#define av_int_list_length(list, term) \
337		av_int_list_length_for_size(sizeof(*(list)), list, term)
338		#endif
339
340		/**
341		* Return the fractional representation of the internal time base.
342		*/
343		AVRational av_get_time_base_q(void);
344
345	0	#define AV_FOURCC_MAX_STRING_SIZE 32
346
347	0	#define av_fourcc2str(fourcc) av_fourcc_make_string((char[AV_FOURCC_MAX_STRING_SIZE]){0}, fourcc)
348
349		/**
350		* Fill the provided buffer with a string containing a FourCC (four-character
351		* code) representation.
352		*
353		* @param buf a buffer with size in bytes of at least AV_FOURCC_MAX_STRING_SIZE
354		* @param fourcc the fourcc to represent
355		* @return the buffer in input
356		*/
357		char av_fourcc_make_string(char buf, uint32_t fourcc);
358
359		/**
360		* @}
361		* @}
362		*/
363
364		#endif /* AVUTIL_AVUTIL_H */