FFmpeg 6.1.1
frame.h
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1/*
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12 * Lesser General Public License for more details.
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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
17 */
18
19/**
20 * @file
21 * @ingroup lavu_frame
22 * reference-counted frame API
23 */
24
25#ifndef AVUTIL_FRAME_H
26#define AVUTIL_FRAME_H
27
28#include <stddef.h>
29#include <stdint.h>
30
31#include "avutil.h"
32#include "buffer.h"
33#include "channel_layout.h"
34#include "dict.h"
35#include "rational.h"
36#include "samplefmt.h"
37#include "pixfmt.h"
38#include "version.h"
39
40
41/**
42 * @defgroup lavu_frame AVFrame
43 * @ingroup lavu_data
44 *
45 * @{
46 * AVFrame is an abstraction for reference-counted raw multimedia data.
47 */
48
50 /**
51 * The data is the AVPanScan struct defined in libavcodec.
52 */
54 /**
55 * ATSC A53 Part 4 Closed Captions.
56 * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
57 * The number of bytes of CC data is AVFrameSideData.size.
58 */
60 /**
61 * Stereoscopic 3d metadata.
62 * The data is the AVStereo3D struct defined in libavutil/stereo3d.h.
63 */
65 /**
66 * The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
67 */
69 /**
70 * Metadata relevant to a downmix procedure.
71 * The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h.
72 */
74 /**
75 * ReplayGain information in the form of the AVReplayGain struct.
76 */
78 /**
79 * This side data contains a 3x3 transformation matrix describing an affine
80 * transformation that needs to be applied to the frame for correct
81 * presentation.
82 *
83 * See libavutil/display.h for a detailed description of the data.
84 */
86 /**
87 * Active Format Description data consisting of a single byte as specified
88 * in ETSI TS 101 154 using AVActiveFormatDescription enum.
89 */
91 /**
92 * Motion vectors exported by some codecs (on demand through the export_mvs
93 * flag set in the libavcodec AVCodecContext flags2 option).
94 * The data is the AVMotionVector struct defined in
95 * libavutil/motion_vector.h.
96 */
98 /**
99 * Recommmends skipping the specified number of samples. This is exported
100 * only if the "skip_manual" AVOption is set in libavcodec.
101 * This has the same format as AV_PKT_DATA_SKIP_SAMPLES.
102 * @code
103 * u32le number of samples to skip from start of this packet
104 * u32le number of samples to skip from end of this packet
105 * u8 reason for start skip
106 * u8 reason for end skip (0=padding silence, 1=convergence)
107 * @endcode
108 */
110 /**
111 * This side data must be associated with an audio frame and corresponds to
112 * enum AVAudioServiceType defined in avcodec.h.
113 */
115 /**
116 * Mastering display metadata associated with a video frame. The payload is
117 * an AVMasteringDisplayMetadata type and contains information about the
118 * mastering display color volume.
119 */
121 /**
122 * The GOP timecode in 25 bit timecode format. Data format is 64-bit integer.
123 * This is set on the first frame of a GOP that has a temporal reference of 0.
124 */
126
127 /**
128 * The data represents the AVSphericalMapping structure defined in
129 * libavutil/spherical.h.
130 */
132
133 /**
134 * Content light level (based on CTA-861.3). This payload contains data in
135 * the form of the AVContentLightMetadata struct.
136 */
138
139 /**
140 * The data contains an ICC profile as an opaque octet buffer following the
141 * format described by ISO 15076-1 with an optional name defined in the
142 * metadata key entry "name".
143 */
145
146 /**
147 * Timecode which conforms to SMPTE ST 12-1. The data is an array of 4 uint32_t
148 * where the first uint32_t describes how many (1-3) of the other timecodes are used.
149 * The timecode format is described in the documentation of av_timecode_get_smpte_from_framenum()
150 * function in libavutil/timecode.h.
151 */
153
154 /**
155 * HDR dynamic metadata associated with a video frame. The payload is
156 * an AVDynamicHDRPlus type and contains information for color
157 * volume transform - application 4 of SMPTE 2094-40:2016 standard.
158 */
160
161 /**
162 * Regions Of Interest, the data is an array of AVRegionOfInterest type, the number of
163 * array element is implied by AVFrameSideData.size / AVRegionOfInterest.self_size.
164 */
166
167 /**
168 * Encoding parameters for a video frame, as described by AVVideoEncParams.
169 */
171
172 /**
173 * User data unregistered metadata associated with a video frame.
174 * This is the H.26[45] UDU SEI message, and shouldn't be used for any other purpose
175 * The data is stored as uint8_t in AVFrameSideData.data which is 16 bytes of
176 * uuid_iso_iec_11578 followed by AVFrameSideData.size - 16 bytes of user_data_payload_byte.
177 */
179
180 /**
181 * Film grain parameters for a frame, described by AVFilmGrainParams.
182 * Must be present for every frame which should have film grain applied.
183 */
185
186 /**
187 * Bounding boxes for object detection and classification,
188 * as described by AVDetectionBBoxHeader.
189 */
191
192 /**
193 * Dolby Vision RPU raw data, suitable for passing to x265
194 * or other libraries. Array of uint8_t, with NAL emulation
195 * bytes intact.
196 */
198
199 /**
200 * Parsed Dolby Vision metadata, suitable for passing to a software
201 * implementation. The payload is the AVDOVIMetadata struct defined in
202 * libavutil/dovi_meta.h.
203 */
205
206 /**
207 * HDR Vivid dynamic metadata associated with a video frame. The payload is
208 * an AVDynamicHDRVivid type and contains information for color
209 * volume transform - CUVA 005.1-2021.
210 */
212
213 /**
214 * Ambient viewing environment metadata, as defined by H.274.
215 */
217
218 /**
219 * Provide encoder-specific hinting information about changed/unchanged
220 * portions of a frame. It can be used to pass information about which
221 * macroblocks can be skipped because they didn't change from the
222 * corresponding ones in the previous frame. This could be useful for
223 * applications which know this information in advance to speed up
224 * encoding.
225 */
227};
228
237};
238
239
240/**
241 * Structure to hold side data for an AVFrame.
242 *
243 * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
244 * to the end with a minor bump.
245 */
246typedef struct AVFrameSideData {
248 uint8_t *data;
249 size_t size;
253
254/**
255 * Structure describing a single Region Of Interest.
256 *
257 * When multiple regions are defined in a single side-data block, they
258 * should be ordered from most to least important - some encoders are only
259 * capable of supporting a limited number of distinct regions, so will have
260 * to truncate the list.
261 *
262 * When overlapping regions are defined, the first region containing a given
263 * area of the frame applies.
264 */
265typedef struct AVRegionOfInterest {
266 /**
267 * Must be set to the size of this data structure (that is,
268 * sizeof(AVRegionOfInterest)).
269 */
270 uint32_t self_size;
271 /**
272 * Distance in pixels from the top edge of the frame to the top and
273 * bottom edges and from the left edge of the frame to the left and
274 * right edges of the rectangle defining this region of interest.
275 *
276 * The constraints on a region are encoder dependent, so the region
277 * actually affected may be slightly larger for alignment or other
278 * reasons.
279 */
280 int top;
282 int left;
283 int right;
284 /**
285 * Quantisation offset.
286 *
287 * Must be in the range -1 to +1. A value of zero indicates no quality
288 * change. A negative value asks for better quality (less quantisation),
289 * while a positive value asks for worse quality (greater quantisation).
290 *
291 * The range is calibrated so that the extreme values indicate the
292 * largest possible offset - if the rest of the frame is encoded with the
293 * worst possible quality, an offset of -1 indicates that this region
294 * should be encoded with the best possible quality anyway. Intermediate
295 * values are then interpolated in some codec-dependent way.
296 *
297 * For example, in 10-bit H.264 the quantisation parameter varies between
298 * -12 and 51. A typical qoffset value of -1/10 therefore indicates that
299 * this region should be encoded with a QP around one-tenth of the full
300 * range better than the rest of the frame. So, if most of the frame
301 * were to be encoded with a QP of around 30, this region would get a QP
302 * of around 24 (an offset of approximately -1/10 * (51 - -12) = -6.3).
303 * An extreme value of -1 would indicate that this region should be
304 * encoded with the best possible quality regardless of the treatment of
305 * the rest of the frame - that is, should be encoded at a QP of -12.
306 */
309
310/**
311 * This structure describes decoded (raw) audio or video data.
312 *
313 * AVFrame must be allocated using av_frame_alloc(). Note that this only
314 * allocates the AVFrame itself, the buffers for the data must be managed
315 * through other means (see below).
316 * AVFrame must be freed with av_frame_free().
317 *
318 * AVFrame is typically allocated once and then reused multiple times to hold
319 * different data (e.g. a single AVFrame to hold frames received from a
320 * decoder). In such a case, av_frame_unref() will free any references held by
321 * the frame and reset it to its original clean state before it
322 * is reused again.
323 *
324 * The data described by an AVFrame is usually reference counted through the
325 * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
326 * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
327 * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
328 * every single data plane must be contained in one of the buffers in
329 * AVFrame.buf or AVFrame.extended_buf.
330 * There may be a single buffer for all the data, or one separate buffer for
331 * each plane, or anything in between.
332 *
333 * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
334 * to the end with a minor bump.
335 *
336 * Fields can be accessed through AVOptions, the name string used, matches the
337 * C structure field name for fields accessible through AVOptions. The AVClass
338 * for AVFrame can be obtained from avcodec_get_frame_class()
339 */
340typedef struct AVFrame {
341#define AV_NUM_DATA_POINTERS 8
342 /**
343 * pointer to the picture/channel planes.
344 * This might be different from the first allocated byte. For video,
345 * it could even point to the end of the image data.
346 *
347 * All pointers in data and extended_data must point into one of the
348 * AVBufferRef in buf or extended_buf.
349 *
350 * Some decoders access areas outside 0,0 - width,height, please
351 * see avcodec_align_dimensions2(). Some filters and swscale can read
352 * up to 16 bytes beyond the planes, if these filters are to be used,
353 * then 16 extra bytes must be allocated.
354 *
355 * NOTE: Pointers not needed by the format MUST be set to NULL.
356 *
357 * @attention In case of video, the data[] pointers can point to the
358 * end of image data in order to reverse line order, when used in
359 * combination with negative values in the linesize[] array.
360 */
362
363 /**
364 * For video, a positive or negative value, which is typically indicating
365 * the size in bytes of each picture line, but it can also be:
366 * - the negative byte size of lines for vertical flipping
367 * (with data[n] pointing to the end of the data
368 * - a positive or negative multiple of the byte size as for accessing
369 * even and odd fields of a frame (possibly flipped)
370 *
371 * For audio, only linesize[0] may be set. For planar audio, each channel
372 * plane must be the same size.
373 *
374 * For video the linesizes should be multiples of the CPUs alignment
375 * preference, this is 16 or 32 for modern desktop CPUs.
376 * Some code requires such alignment other code can be slower without
377 * correct alignment, for yet other it makes no difference.
378 *
379 * @note The linesize may be larger than the size of usable data -- there
380 * may be extra padding present for performance reasons.
381 *
382 * @attention In case of video, line size values can be negative to achieve
383 * a vertically inverted iteration over image lines.
384 */
386
387 /**
388 * pointers to the data planes/channels.
389 *
390 * For video, this should simply point to data[].
391 *
392 * For planar audio, each channel has a separate data pointer, and
393 * linesize[0] contains the size of each channel buffer.
394 * For packed audio, there is just one data pointer, and linesize[0]
395 * contains the total size of the buffer for all channels.
396 *
397 * Note: Both data and extended_data should always be set in a valid frame,
398 * but for planar audio with more channels that can fit in data,
399 * extended_data must be used in order to access all channels.
400 */
401 uint8_t **extended_data;
402
403 /**
404 * @name Video dimensions
405 * Video frames only. The coded dimensions (in pixels) of the video frame,
406 * i.e. the size of the rectangle that contains some well-defined values.
407 *
408 * @note The part of the frame intended for display/presentation is further
409 * restricted by the @ref cropping "Cropping rectangle".
410 * @{
411 */
413 /**
414 * @}
415 */
416
417 /**
418 * number of audio samples (per channel) described by this frame
419 */
421
422 /**
423 * format of the frame, -1 if unknown or unset
424 * Values correspond to enum AVPixelFormat for video frames,
425 * enum AVSampleFormat for audio)
426 */
428
429#if FF_API_FRAME_KEY
430 /**
431 * 1 -> keyframe, 0-> not
432 *
433 * @deprecated Use AV_FRAME_FLAG_KEY instead
434 */
437#endif
438
439 /**
440 * Picture type of the frame.
441 */
443
444 /**
445 * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
446 */
448
449 /**
450 * Presentation timestamp in time_base units (time when frame should be shown to user).
451 */
452 int64_t pts;
453
454 /**
455 * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
456 * This is also the Presentation time of this AVFrame calculated from
457 * only AVPacket.dts values without pts values.
458 */
459 int64_t pkt_dts;
460
461 /**
462 * Time base for the timestamps in this frame.
463 * In the future, this field may be set on frames output by decoders or
464 * filters, but its value will be by default ignored on input to encoders
465 * or filters.
466 */
468
469#if FF_API_FRAME_PICTURE_NUMBER
470 /**
471 * picture number in bitstream order
472 */
475 /**
476 * picture number in display order
477 */
480#endif
481
482 /**
483 * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
484 */
486
487 /**
488 * Frame owner's private data.
489 *
490 * This field may be set by the code that allocates/owns the frame data.
491 * It is then not touched by any library functions, except:
492 * - it is copied to other references by av_frame_copy_props() (and hence by
493 * av_frame_ref());
494 * - it is set to NULL when the frame is cleared by av_frame_unref()
495 * - on the caller's explicit request. E.g. libavcodec encoders/decoders
496 * will copy this field to/from @ref AVPacket "AVPackets" if the caller sets
497 * @ref AV_CODEC_FLAG_COPY_OPAQUE.
498 *
499 * @see opaque_ref the reference-counted analogue
500 */
501 void *opaque;
502
503 /**
504 * Number of fields in this frame which should be repeated, i.e. the total
505 * duration of this frame should be repeat_pict + 2 normal field durations.
506 *
507 * For interlaced frames this field may be set to 1, which signals that this
508 * frame should be presented as 3 fields: beginning with the first field (as
509 * determined by AV_FRAME_FLAG_TOP_FIELD_FIRST being set or not), followed
510 * by the second field, and then the first field again.
511 *
512 * For progressive frames this field may be set to a multiple of 2, which
513 * signals that this frame's duration should be (repeat_pict + 2) / 2
514 * normal frame durations.
515 *
516 * @note This field is computed from MPEG2 repeat_first_field flag and its
517 * associated flags, H.264 pic_struct from picture timing SEI, and
518 * their analogues in other codecs. Typically it should only be used when
519 * higher-layer timing information is not available.
520 */
522
523#if FF_API_INTERLACED_FRAME
524 /**
525 * The content of the picture is interlaced.
526 *
527 * @deprecated Use AV_FRAME_FLAG_INTERLACED instead
528 */
531
532 /**
533 * If the content is interlaced, is top field displayed first.
534 *
535 * @deprecated Use AV_FRAME_FLAG_TOP_FIELD_FIRST instead
536 */
539#endif
540
541#if FF_API_PALETTE_HAS_CHANGED
542 /**
543 * Tell user application that palette has changed from previous frame.
544 */
547#endif
548
549#if FF_API_REORDERED_OPAQUE
550 /**
551 * reordered opaque 64 bits (generally an integer or a double precision float
552 * PTS but can be anything).
553 * The user sets AVCodecContext.reordered_opaque to represent the input at
554 * that time,
555 * the decoder reorders values as needed and sets AVFrame.reordered_opaque
556 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
557 *
558 * @deprecated Use AV_CODEC_FLAG_COPY_OPAQUE instead
559 */
562#endif
563
564 /**
565 * Sample rate of the audio data.
566 */
568
569#if FF_API_OLD_CHANNEL_LAYOUT
570 /**
571 * Channel layout of the audio data.
572 * @deprecated use ch_layout instead
573 */
576#endif
577
578 /**
579 * AVBuffer references backing the data for this frame. All the pointers in
580 * data and extended_data must point inside one of the buffers in buf or
581 * extended_buf. This array must be filled contiguously -- if buf[i] is
582 * non-NULL then buf[j] must also be non-NULL for all j < i.
583 *
584 * There may be at most one AVBuffer per data plane, so for video this array
585 * always contains all the references. For planar audio with more than
586 * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
587 * this array. Then the extra AVBufferRef pointers are stored in the
588 * extended_buf array.
589 */
591
592 /**
593 * For planar audio which requires more than AV_NUM_DATA_POINTERS
594 * AVBufferRef pointers, this array will hold all the references which
595 * cannot fit into AVFrame.buf.
596 *
597 * Note that this is different from AVFrame.extended_data, which always
598 * contains all the pointers. This array only contains the extra pointers,
599 * which cannot fit into AVFrame.buf.
600 *
601 * This array is always allocated using av_malloc() by whoever constructs
602 * the frame. It is freed in av_frame_unref().
603 */
605 /**
606 * Number of elements in extended_buf.
607 */
609
612
613/**
614 * @defgroup lavu_frame_flags AV_FRAME_FLAGS
615 * @ingroup lavu_frame
616 * Flags describing additional frame properties.
617 *
618 * @{
619 */
620
621/**
622 * The frame data may be corrupted, e.g. due to decoding errors.
623 */
624#define AV_FRAME_FLAG_CORRUPT (1 << 0)
625/**
626 * A flag to mark frames that are keyframes.
627 */
628#define AV_FRAME_FLAG_KEY (1 << 1)
629/**
630 * A flag to mark the frames which need to be decoded, but shouldn't be output.
631 */
632#define AV_FRAME_FLAG_DISCARD (1 << 2)
633/**
634 * A flag to mark frames whose content is interlaced.
635 */
636#define AV_FRAME_FLAG_INTERLACED (1 << 3)
637/**
638 * A flag to mark frames where the top field is displayed first if the content
639 * is interlaced.
640 */
641#define AV_FRAME_FLAG_TOP_FIELD_FIRST (1 << 4)
642/**
643 * @}
644 */
645
646 /**
647 * Frame flags, a combination of @ref lavu_frame_flags
648 */
649 int flags;
650
651 /**
652 * MPEG vs JPEG YUV range.
653 * - encoding: Set by user
654 * - decoding: Set by libavcodec
655 */
657
659
661
662 /**
663 * YUV colorspace type.
664 * - encoding: Set by user
665 * - decoding: Set by libavcodec
666 */
668
670
671 /**
672 * frame timestamp estimated using various heuristics, in stream time base
673 * - encoding: unused
674 * - decoding: set by libavcodec, read by user.
675 */
677
678#if FF_API_FRAME_PKT
679 /**
680 * reordered pos from the last AVPacket that has been input into the decoder
681 * - encoding: unused
682 * - decoding: Read by user.
683 * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
684 * data from packets to frames
685 */
687 int64_t pkt_pos;
688#endif
689
690#if FF_API_PKT_DURATION
691 /**
692 * duration of the corresponding packet, expressed in
693 * AVStream->time_base units, 0 if unknown.
694 * - encoding: unused
695 * - decoding: Read by user.
696 *
697 * @deprecated use duration instead
698 */
701#endif
702
703 /**
704 * metadata.
705 * - encoding: Set by user.
706 * - decoding: Set by libavcodec.
707 */
709
710 /**
711 * decode error flags of the frame, set to a combination of
712 * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
713 * were errors during the decoding.
714 * - encoding: unused
715 * - decoding: set by libavcodec, read by user.
716 */
718#define FF_DECODE_ERROR_INVALID_BITSTREAM 1
719#define FF_DECODE_ERROR_MISSING_REFERENCE 2
720#define FF_DECODE_ERROR_CONCEALMENT_ACTIVE 4
721#define FF_DECODE_ERROR_DECODE_SLICES 8
722
723#if FF_API_OLD_CHANNEL_LAYOUT
724 /**
725 * number of audio channels, only used for audio.
726 * - encoding: unused
727 * - decoding: Read by user.
728 * @deprecated use ch_layout instead
729 */
732#endif
733
734#if FF_API_FRAME_PKT
735 /**
736 * size of the corresponding packet containing the compressed
737 * frame.
738 * It is set to a negative value if unknown.
739 * - encoding: unused
740 * - decoding: set by libavcodec, read by user.
741 * @deprecated use AV_CODEC_FLAG_COPY_OPAQUE to pass through arbitrary user
742 * data from packets to frames
743 */
746#endif
747
748 /**
749 * For hwaccel-format frames, this should be a reference to the
750 * AVHWFramesContext describing the frame.
751 */
753
754 /**
755 * Frame owner's private data.
756 *
757 * This field may be set by the code that allocates/owns the frame data.
758 * It is then not touched by any library functions, except:
759 * - a new reference to the underlying buffer is propagated by
760 * av_frame_copy_props() (and hence by av_frame_ref());
761 * - it is unreferenced in av_frame_unref();
762 * - on the caller's explicit request. E.g. libavcodec encoders/decoders
763 * will propagate a new reference to/from @ref AVPacket "AVPackets" if the
764 * caller sets @ref AV_CODEC_FLAG_COPY_OPAQUE.
765 *
766 * @see opaque the plain pointer analogue
767 */
769
770 /**
771 * @anchor cropping
772 * @name Cropping
773 * Video frames only. The number of pixels to discard from the the
774 * top/bottom/left/right border of the frame to obtain the sub-rectangle of
775 * the frame intended for presentation.
776 * @{
777 */
778 size_t crop_top;
780 size_t crop_left;
782 /**
783 * @}
784 */
785
786 /**
787 * AVBufferRef for internal use by a single libav* library.
788 * Must not be used to transfer data between libraries.
789 * Has to be NULL when ownership of the frame leaves the respective library.
790 *
791 * Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
792 *
793 * FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
794 * av_frame_copy_props() calls create a new reference with av_buffer_ref()
795 * for the target frame's private_ref field.
796 */
798
799 /**
800 * Channel layout of the audio data.
801 */
803
804 /**
805 * Duration of the frame, in the same units as pts. 0 if unknown.
806 */
807 int64_t duration;
808} AVFrame;
809
810
811/**
812 * Allocate an AVFrame and set its fields to default values. The resulting
813 * struct must be freed using av_frame_free().
814 *
815 * @return An AVFrame filled with default values or NULL on failure.
816 *
817 * @note this only allocates the AVFrame itself, not the data buffers. Those
818 * must be allocated through other means, e.g. with av_frame_get_buffer() or
819 * manually.
820 */
822
823/**
824 * Free the frame and any dynamically allocated objects in it,
825 * e.g. extended_data. If the frame is reference counted, it will be
826 * unreferenced first.
827 *
828 * @param frame frame to be freed. The pointer will be set to NULL.
829 */
831
832/**
833 * Set up a new reference to the data described by the source frame.
834 *
835 * Copy frame properties from src to dst and create a new reference for each
836 * AVBufferRef from src.
837 *
838 * If src is not reference counted, new buffers are allocated and the data is
839 * copied.
840 *
841 * @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
842 * or newly allocated with av_frame_alloc() before calling this
843 * function, or undefined behavior will occur.
844 *
845 * @return 0 on success, a negative AVERROR on error
846 */
847int av_frame_ref(AVFrame *dst, const AVFrame *src);
848
849/**
850 * Ensure the destination frame refers to the same data described by the source
851 * frame, either by creating a new reference for each AVBufferRef from src if
852 * they differ from those in dst, by allocating new buffers and copying data if
853 * src is not reference counted, or by unrefencing it if src is empty.
854 *
855 * Frame properties on dst will be replaced by those from src.
856 *
857 * @return 0 on success, a negative AVERROR on error. On error, dst is
858 * unreferenced.
859 */
860int av_frame_replace(AVFrame *dst, const AVFrame *src);
861
862/**
863 * Create a new frame that references the same data as src.
864 *
865 * This is a shortcut for av_frame_alloc()+av_frame_ref().
866 *
867 * @return newly created AVFrame on success, NULL on error.
868 */
870
871/**
872 * Unreference all the buffers referenced by frame and reset the frame fields.
873 */
875
876/**
877 * Move everything contained in src to dst and reset src.
878 *
879 * @warning: dst is not unreferenced, but directly overwritten without reading
880 * or deallocating its contents. Call av_frame_unref(dst) manually
881 * before calling this function to ensure that no memory is leaked.
882 */
884
885/**
886 * Allocate new buffer(s) for audio or video data.
887 *
888 * The following fields must be set on frame before calling this function:
889 * - format (pixel format for video, sample format for audio)
890 * - width and height for video
891 * - nb_samples and ch_layout for audio
892 *
893 * This function will fill AVFrame.data and AVFrame.buf arrays and, if
894 * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
895 * For planar formats, one buffer will be allocated for each plane.
896 *
897 * @warning: if frame already has been allocated, calling this function will
898 * leak memory. In addition, undefined behavior can occur in certain
899 * cases.
900 *
901 * @param frame frame in which to store the new buffers.
902 * @param align Required buffer size alignment. If equal to 0, alignment will be
903 * chosen automatically for the current CPU. It is highly
904 * recommended to pass 0 here unless you know what you are doing.
905 *
906 * @return 0 on success, a negative AVERROR on error.
907 */
909
910/**
911 * Check if the frame data is writable.
912 *
913 * @return A positive value if the frame data is writable (which is true if and
914 * only if each of the underlying buffers has only one reference, namely the one
915 * stored in this frame). Return 0 otherwise.
916 *
917 * If 1 is returned the answer is valid until av_buffer_ref() is called on any
918 * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
919 *
920 * @see av_frame_make_writable(), av_buffer_is_writable()
921 */
923
924/**
925 * Ensure that the frame data is writable, avoiding data copy if possible.
926 *
927 * Do nothing if the frame is writable, allocate new buffers and copy the data
928 * if it is not. Non-refcounted frames behave as non-writable, i.e. a copy
929 * is always made.
930 *
931 * @return 0 on success, a negative AVERROR on error.
932 *
933 * @see av_frame_is_writable(), av_buffer_is_writable(),
934 * av_buffer_make_writable()
935 */
937
938/**
939 * Copy the frame data from src to dst.
940 *
941 * This function does not allocate anything, dst must be already initialized and
942 * allocated with the same parameters as src.
943 *
944 * This function only copies the frame data (i.e. the contents of the data /
945 * extended data arrays), not any other properties.
946 *
947 * @return >= 0 on success, a negative AVERROR on error.
948 */
949int av_frame_copy(AVFrame *dst, const AVFrame *src);
950
951/**
952 * Copy only "metadata" fields from src to dst.
953 *
954 * Metadata for the purpose of this function are those fields that do not affect
955 * the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
956 * aspect ratio (for video), but not width/height or channel layout.
957 * Side data is also copied.
958 */
959int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
960
961/**
962 * Get the buffer reference a given data plane is stored in.
963 *
964 * @param frame the frame to get the plane's buffer from
965 * @param plane index of the data plane of interest in frame->extended_data.
966 *
967 * @return the buffer reference that contains the plane or NULL if the input
968 * frame is not valid.
969 */
971
972/**
973 * Add a new side data to a frame.
974 *
975 * @param frame a frame to which the side data should be added
976 * @param type type of the added side data
977 * @param size size of the side data
978 *
979 * @return newly added side data on success, NULL on error
980 */
982 enum AVFrameSideDataType type,
983 size_t size);
984
985/**
986 * Add a new side data to a frame from an existing AVBufferRef
987 *
988 * @param frame a frame to which the side data should be added
989 * @param type the type of the added side data
990 * @param buf an AVBufferRef to add as side data. The ownership of
991 * the reference is transferred to the frame.
992 *
993 * @return newly added side data on success, NULL on error. On failure
994 * the frame is unchanged and the AVBufferRef remains owned by
995 * the caller.
996 */
998 enum AVFrameSideDataType type,
999 AVBufferRef *buf);
1000
1001/**
1002 * @return a pointer to the side data of a given type on success, NULL if there
1003 * is no side data with such type in this frame.
1004 */
1006 enum AVFrameSideDataType type);
1007
1008/**
1009 * Remove and free all side data instances of the given type.
1010 */
1012
1013
1014/**
1015 * Flags for frame cropping.
1016 */
1017enum {
1018 /**
1019 * Apply the maximum possible cropping, even if it requires setting the
1020 * AVFrame.data[] entries to unaligned pointers. Passing unaligned data
1021 * to FFmpeg API is generally not allowed, and causes undefined behavior
1022 * (such as crashes). You can pass unaligned data only to FFmpeg APIs that
1023 * are explicitly documented to accept it. Use this flag only if you
1024 * absolutely know what you are doing.
1025 */
1027};
1028
1029/**
1030 * Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
1031 * crop_bottom fields. If cropping is successful, the function will adjust the
1032 * data pointers and the width/height fields, and set the crop fields to 0.
1033 *
1034 * In all cases, the cropping boundaries will be rounded to the inherent
1035 * alignment of the pixel format. In some cases, such as for opaque hwaccel
1036 * formats, the left/top cropping is ignored. The crop fields are set to 0 even
1037 * if the cropping was rounded or ignored.
1038 *
1039 * @param frame the frame which should be cropped
1040 * @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
1041 *
1042 * @return >= 0 on success, a negative AVERROR on error. If the cropping fields
1043 * were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
1044 */
1046
1047/**
1048 * @return a string identifying the side data type
1049 */
1051
1052/**
1053 * @}
1054 */
1055
1056#endif /* AVUTIL_FRAME_H */
#define attribute_deprecated
Definition: attributes.h:100
Convenience header that includes libavutil's core.
refcounted data buffer API
Public libavutil channel layout APIs header.
static AVFrame * frame
Definition: demux_decode.c:54
Public dictionary API.
#define AV_NUM_DATA_POINTERS
Definition: frame.h:341
struct AVDictionary AVDictionary
Definition: dict.h:94
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
void av_frame_remove_side_data(AVFrame *frame, enum AVFrameSideDataType type)
Remove and free all side data instances of the given type.
int av_frame_replace(AVFrame *dst, const AVFrame *src)
Ensure the destination frame refers to the same data described by the source frame,...
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
AVActiveFormatDescription
Definition: frame.h:229
int av_frame_get_buffer(AVFrame *frame, int align)
Allocate new buffer(s) for audio or video data.
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, size_t size)
Add a new side data to a frame.
AVFrameSideData * av_frame_new_side_data_from_buf(AVFrame *frame, enum AVFrameSideDataType type, AVBufferRef *buf)
Add a new side data to a frame from an existing AVBufferRef.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
AVFrameSideDataType
Definition: frame.h:49
int av_frame_apply_cropping(AVFrame *frame, int flags)
Crop the given video AVFrame according to its crop_left/crop_top/crop_right/ crop_bottom fields.
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
const char * av_frame_side_data_name(enum AVFrameSideDataType type)
AVBufferRef * av_frame_get_plane_buffer(const AVFrame *frame, int plane)
Get the buffer reference a given data plane is stored in.
@ AV_AFD_14_9
Definition: frame.h:233
@ AV_AFD_SAME
Definition: frame.h:230
@ AV_AFD_16_9_SP_14_9
Definition: frame.h:235
@ AV_AFD_4_3_SP_14_9
Definition: frame.h:234
@ AV_AFD_SP_4_3
Definition: frame.h:236
@ AV_AFD_4_3
Definition: frame.h:231
@ AV_AFD_16_9
Definition: frame.h:232
@ AV_FRAME_CROP_UNALIGNED
Apply the maximum possible cropping, even if it requires setting the AVFrame.data[] entries to unalig...
Definition: frame.h:1026
@ AV_FRAME_DATA_GOP_TIMECODE
The GOP timecode in 25 bit timecode format.
Definition: frame.h:125
@ AV_FRAME_DATA_DOVI_METADATA
Parsed Dolby Vision metadata, suitable for passing to a software implementation.
Definition: frame.h:204
@ AV_FRAME_DATA_SPHERICAL
The data represents the AVSphericalMapping structure defined in libavutil/spherical....
Definition: frame.h:131
@ AV_FRAME_DATA_DYNAMIC_HDR_VIVID
HDR Vivid dynamic metadata associated with a video frame.
Definition: frame.h:211
@ AV_FRAME_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition: frame.h:137
@ AV_FRAME_DATA_AMBIENT_VIEWING_ENVIRONMENT
Ambient viewing environment metadata, as defined by H.274.
Definition: frame.h:216
@ AV_FRAME_DATA_PANSCAN
The data is the AVPanScan struct defined in libavcodec.
Definition: frame.h:53
@ AV_FRAME_DATA_DISPLAYMATRIX
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: frame.h:85
@ AV_FRAME_DATA_A53_CC
ATSC A53 Part 4 Closed Captions.
Definition: frame.h:59
@ AV_FRAME_DATA_SEI_UNREGISTERED
User data unregistered metadata associated with a video frame.
Definition: frame.h:178
@ AV_FRAME_DATA_AUDIO_SERVICE_TYPE
This side data must be associated with an audio frame and corresponds to enum AVAudioServiceType defi...
Definition: frame.h:114
@ AV_FRAME_DATA_DYNAMIC_HDR_PLUS
HDR dynamic metadata associated with a video frame.
Definition: frame.h:159
@ AV_FRAME_DATA_REPLAYGAIN
ReplayGain information in the form of the AVReplayGain struct.
Definition: frame.h:77
@ AV_FRAME_DATA_SKIP_SAMPLES
Recommmends skipping the specified number of samples.
Definition: frame.h:109
@ AV_FRAME_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata associated with a video frame.
Definition: frame.h:120
@ AV_FRAME_DATA_DOWNMIX_INFO
Metadata relevant to a downmix procedure.
Definition: frame.h:73
@ AV_FRAME_DATA_FILM_GRAIN_PARAMS
Film grain parameters for a frame, described by AVFilmGrainParams.
Definition: frame.h:184
@ AV_FRAME_DATA_VIDEO_ENC_PARAMS
Encoding parameters for a video frame, as described by AVVideoEncParams.
Definition: frame.h:170
@ AV_FRAME_DATA_DETECTION_BBOXES
Bounding boxes for object detection and classification, as described by AVDetectionBBoxHeader.
Definition: frame.h:190
@ AV_FRAME_DATA_ICC_PROFILE
The data contains an ICC profile as an opaque octet buffer following the format described by ISO 1507...
Definition: frame.h:144
@ AV_FRAME_DATA_AFD
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: frame.h:90
@ AV_FRAME_DATA_S12M_TIMECODE
Timecode which conforms to SMPTE ST 12-1.
Definition: frame.h:152
@ AV_FRAME_DATA_MATRIXENCODING
The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h.
Definition: frame.h:68
@ AV_FRAME_DATA_DOVI_RPU_BUFFER
Dolby Vision RPU raw data, suitable for passing to x265 or other libraries.
Definition: frame.h:197
@ AV_FRAME_DATA_STEREO3D
Stereoscopic 3d metadata.
Definition: frame.h:64
@ AV_FRAME_DATA_VIDEO_HINT
Provide encoder-specific hinting information about changed/unchanged portions of a frame.
Definition: frame.h:226
@ AV_FRAME_DATA_MOTION_VECTORS
Motion vectors exported by some codecs (on demand through the export_mvs flag set in the libavcodec A...
Definition: frame.h:97
@ AV_FRAME_DATA_REGIONS_OF_INTEREST
Regions Of Interest, the data is an array of AVRegionOfInterest type, the number of array element is ...
Definition: frame.h:165
AVPictureType
Definition: avutil.h:277
swscale version macros
pixel format definitions
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:692
AVColorRange
Visual content value range.
Definition: pixfmt.h:638
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:545
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:570
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:599
Utilties for rational number calculation.
A reference to a data buffer.
Definition: buffer.h:82
An AVChannelLayout holds information about the channel layout of audio data.
Structure to hold side data for an AVFrame.
Definition: frame.h:246
enum AVFrameSideDataType type
Definition: frame.h:247
AVDictionary * metadata
Definition: frame.h:250
size_t size
Definition: frame.h:249
uint8_t * data
Definition: frame.h:248
AVBufferRef * buf
Definition: frame.h:251
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:420
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:676
attribute_deprecated int64_t reordered_opaque
reordered opaque 64 bits (generally an integer or a double precision float PTS but can be anything).
Definition: frame.h:561
attribute_deprecated int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:546
size_t crop_right
Definition: frame.h:781
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
enum AVChromaLocation chroma_location
Definition: frame.h:669
int width
Definition: frame.h:412
AVBufferRef ** extended_buf
For planar audio which requires more than AV_NUM_DATA_POINTERS AVBufferRef pointers,...
Definition: frame.h:604
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame.
Definition: frame.h:752
AVRational time_base
Time base for the timestamps in this frame.
Definition: frame.h:467
void * opaque
Frame owner's private data.
Definition: frame.h:501
int decode_error_flags
decode error flags of the frame, set to a combination of FF_DECODE_ERROR_xxx flags if the decoder pro...
Definition: frame.h:717
int height
Definition: frame.h:412
AVFrameSideData ** side_data
Definition: frame.h:610
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:649
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:590
attribute_deprecated int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:538
attribute_deprecated int channels
number of audio channels, only used for audio.
Definition: frame.h:731
enum AVColorPrimaries color_primaries
Definition: frame.h:658
AVDictionary * metadata
metadata.
Definition: frame.h:708
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:447
AVBufferRef * private_ref
AVBufferRef for internal use by a single libav* library.
Definition: frame.h:797
attribute_deprecated uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:575
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:485
AVBufferRef * opaque_ref
Frame owner's private data.
Definition: frame.h:768
size_t crop_top
Definition: frame.h:778
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:656
attribute_deprecated int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:530
attribute_deprecated int pkt_size
size of the corresponding packet containing the compressed frame.
Definition: frame.h:745
int nb_side_data
Definition: frame.h:611
attribute_deprecated int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown.
Definition: frame.h:700
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:667
int nb_extended_buf
Number of elements in extended_buf.
Definition: frame.h:608
attribute_deprecated int coded_picture_number
picture number in bitstream order
Definition: frame.h:474
int64_t pkt_dts
DTS copied from the AVPacket that triggered returning this frame.
Definition: frame.h:459
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:385
size_t crop_left
Definition: frame.h:780
enum AVColorTransferCharacteristic color_trc
Definition: frame.h:660
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:807
int sample_rate
Sample rate of the audio data.
Definition: frame.h:567
AVChannelLayout ch_layout
Channel layout of the audio data.
Definition: frame.h:802
size_t crop_bottom
Definition: frame.h:779
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
int repeat_pict
Number of fields in this frame which should be repeated, i.e.
Definition: frame.h:521
attribute_deprecated int display_picture_number
picture number in display order
Definition: frame.h:479
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:442
attribute_deprecated int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:687
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:401
attribute_deprecated int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:436
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Structure describing a single Region Of Interest.
Definition: frame.h:265
uint32_t self_size
Must be set to the size of this data structure (that is, sizeof(AVRegionOfInterest)).
Definition: frame.h:270
AVRational qoffset
Quantisation offset.
Definition: frame.h:307
int top
Distance in pixels from the top edge of the frame to the top and bottom edges and from the left edge ...
Definition: frame.h:280