FFmpeg  n5.1.2
frame.h
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1 /*
2  * This file is part of FFmpeg.
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5  * modify it under the terms of the GNU Lesser General Public
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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 
222 };
223 
224 
225 /**
226  * Structure to hold side data for an AVFrame.
227  *
228  * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added
229  * to the end with a minor bump.
230  */
231 typedef struct AVFrameSideData {
233  uint8_t *data;
234  size_t size;
238 
239 /**
240  * Structure describing a single Region Of Interest.
241  *
242  * When multiple regions are defined in a single side-data block, they
243  * should be ordered from most to least important - some encoders are only
244  * capable of supporting a limited number of distinct regions, so will have
245  * to truncate the list.
246  *
247  * When overlapping regions are defined, the first region containing a given
248  * area of the frame applies.
249  */
250 typedef struct AVRegionOfInterest {
251  /**
252  * Must be set to the size of this data structure (that is,
253  * sizeof(AVRegionOfInterest)).
254  */
255  uint32_t self_size;
256  /**
257  * Distance in pixels from the top edge of the frame to the top and
258  * bottom edges and from the left edge of the frame to the left and
259  * right edges of the rectangle defining this region of interest.
260  *
261  * The constraints on a region are encoder dependent, so the region
262  * actually affected may be slightly larger for alignment or other
263  * reasons.
264  */
265  int top;
266  int bottom;
267  int left;
268  int right;
269  /**
270  * Quantisation offset.
271  *
272  * Must be in the range -1 to +1. A value of zero indicates no quality
273  * change. A negative value asks for better quality (less quantisation),
274  * while a positive value asks for worse quality (greater quantisation).
275  *
276  * The range is calibrated so that the extreme values indicate the
277  * largest possible offset - if the rest of the frame is encoded with the
278  * worst possible quality, an offset of -1 indicates that this region
279  * should be encoded with the best possible quality anyway. Intermediate
280  * values are then interpolated in some codec-dependent way.
281  *
282  * For example, in 10-bit H.264 the quantisation parameter varies between
283  * -12 and 51. A typical qoffset value of -1/10 therefore indicates that
284  * this region should be encoded with a QP around one-tenth of the full
285  * range better than the rest of the frame. So, if most of the frame
286  * were to be encoded with a QP of around 30, this region would get a QP
287  * of around 24 (an offset of approximately -1/10 * (51 - -12) = -6.3).
288  * An extreme value of -1 would indicate that this region should be
289  * encoded with the best possible quality regardless of the treatment of
290  * the rest of the frame - that is, should be encoded at a QP of -12.
291  */
294 
295 /**
296  * This structure describes decoded (raw) audio or video data.
297  *
298  * AVFrame must be allocated using av_frame_alloc(). Note that this only
299  * allocates the AVFrame itself, the buffers for the data must be managed
300  * through other means (see below).
301  * AVFrame must be freed with av_frame_free().
302  *
303  * AVFrame is typically allocated once and then reused multiple times to hold
304  * different data (e.g. a single AVFrame to hold frames received from a
305  * decoder). In such a case, av_frame_unref() will free any references held by
306  * the frame and reset it to its original clean state before it
307  * is reused again.
308  *
309  * The data described by an AVFrame is usually reference counted through the
310  * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
311  * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
312  * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
313  * every single data plane must be contained in one of the buffers in
314  * AVFrame.buf or AVFrame.extended_buf.
315  * There may be a single buffer for all the data, or one separate buffer for
316  * each plane, or anything in between.
317  *
318  * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
319  * to the end with a minor bump.
320  *
321  * Fields can be accessed through AVOptions, the name string used, matches the
322  * C structure field name for fields accessible through AVOptions. The AVClass
323  * for AVFrame can be obtained from avcodec_get_frame_class()
324  */
325 typedef struct AVFrame {
326 #define AV_NUM_DATA_POINTERS 8
327  /**
328  * pointer to the picture/channel planes.
329  * This might be different from the first allocated byte. For video,
330  * it could even point to the end of the image data.
331  *
332  * All pointers in data and extended_data must point into one of the
333  * AVBufferRef in buf or extended_buf.
334  *
335  * Some decoders access areas outside 0,0 - width,height, please
336  * see avcodec_align_dimensions2(). Some filters and swscale can read
337  * up to 16 bytes beyond the planes, if these filters are to be used,
338  * then 16 extra bytes must be allocated.
339  *
340  * NOTE: Pointers not needed by the format MUST be set to NULL.
341  *
342  * @attention In case of video, the data[] pointers can point to the
343  * end of image data in order to reverse line order, when used in
344  * combination with negative values in the linesize[] array.
345  */
347 
348  /**
349  * For video, a positive or negative value, which is typically indicating
350  * the size in bytes of each picture line, but it can also be:
351  * - the negative byte size of lines for vertical flipping
352  * (with data[n] pointing to the end of the data
353  * - a positive or negative multiple of the byte size as for accessing
354  * even and odd fields of a frame (possibly flipped)
355  *
356  * For audio, only linesize[0] may be set. For planar audio, each channel
357  * plane must be the same size.
358  *
359  * For video the linesizes should be multiples of the CPUs alignment
360  * preference, this is 16 or 32 for modern desktop CPUs.
361  * Some code requires such alignment other code can be slower without
362  * correct alignment, for yet other it makes no difference.
363  *
364  * @note The linesize may be larger than the size of usable data -- there
365  * may be extra padding present for performance reasons.
366  *
367  * @attention In case of video, line size values can be negative to achieve
368  * a vertically inverted iteration over image lines.
369  */
371 
372  /**
373  * pointers to the data planes/channels.
374  *
375  * For video, this should simply point to data[].
376  *
377  * For planar audio, each channel has a separate data pointer, and
378  * linesize[0] contains the size of each channel buffer.
379  * For packed audio, there is just one data pointer, and linesize[0]
380  * contains the total size of the buffer for all channels.
381  *
382  * Note: Both data and extended_data should always be set in a valid frame,
383  * but for planar audio with more channels that can fit in data,
384  * extended_data must be used in order to access all channels.
385  */
386  uint8_t **extended_data;
387 
388  /**
389  * @name Video dimensions
390  * Video frames only. The coded dimensions (in pixels) of the video frame,
391  * i.e. the size of the rectangle that contains some well-defined values.
392  *
393  * @note The part of the frame intended for display/presentation is further
394  * restricted by the @ref cropping "Cropping rectangle".
395  * @{
396  */
397  int width, height;
398  /**
399  * @}
400  */
401 
402  /**
403  * number of audio samples (per channel) described by this frame
404  */
406 
407  /**
408  * format of the frame, -1 if unknown or unset
409  * Values correspond to enum AVPixelFormat for video frames,
410  * enum AVSampleFormat for audio)
411  */
412  int format;
413 
414  /**
415  * 1 -> keyframe, 0-> not
416  */
418 
419  /**
420  * Picture type of the frame.
421  */
423 
424  /**
425  * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
426  */
428 
429  /**
430  * Presentation timestamp in time_base units (time when frame should be shown to user).
431  */
432  int64_t pts;
433 
434  /**
435  * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used)
436  * This is also the Presentation time of this AVFrame calculated from
437  * only AVPacket.dts values without pts values.
438  */
439  int64_t pkt_dts;
440 
441  /**
442  * Time base for the timestamps in this frame.
443  * In the future, this field may be set on frames output by decoders or
444  * filters, but its value will be by default ignored on input to encoders
445  * or filters.
446  */
448 
449  /**
450  * picture number in bitstream order
451  */
453  /**
454  * picture number in display order
455  */
457 
458  /**
459  * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
460  */
461  int quality;
462 
463  /**
464  * for some private data of the user
465  */
466  void *opaque;
467 
468  /**
469  * When decoding, this signals how much the picture must be delayed.
470  * extra_delay = repeat_pict / (2*fps)
471  */
473 
474  /**
475  * The content of the picture is interlaced.
476  */
478 
479  /**
480  * If the content is interlaced, is top field displayed first.
481  */
483 
484  /**
485  * Tell user application that palette has changed from previous frame.
486  */
488 
489  /**
490  * reordered opaque 64 bits (generally an integer or a double precision float
491  * PTS but can be anything).
492  * The user sets AVCodecContext.reordered_opaque to represent the input at
493  * that time,
494  * the decoder reorders values as needed and sets AVFrame.reordered_opaque
495  * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
496  */
498 
499  /**
500  * Sample rate of the audio data.
501  */
503 
504 #if FF_API_OLD_CHANNEL_LAYOUT
505  /**
506  * Channel layout of the audio data.
507  * @deprecated use ch_layout instead
508  */
510  uint64_t channel_layout;
511 #endif
512 
513  /**
514  * AVBuffer references backing the data for this frame. All the pointers in
515  * data and extended_data must point inside one of the buffers in buf or
516  * extended_buf. This array must be filled contiguously -- if buf[i] is
517  * non-NULL then buf[j] must also be non-NULL for all j < i.
518  *
519  * There may be at most one AVBuffer per data plane, so for video this array
520  * always contains all the references. For planar audio with more than
521  * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
522  * this array. Then the extra AVBufferRef pointers are stored in the
523  * extended_buf array.
524  */
526 
527  /**
528  * For planar audio which requires more than AV_NUM_DATA_POINTERS
529  * AVBufferRef pointers, this array will hold all the references which
530  * cannot fit into AVFrame.buf.
531  *
532  * Note that this is different from AVFrame.extended_data, which always
533  * contains all the pointers. This array only contains the extra pointers,
534  * which cannot fit into AVFrame.buf.
535  *
536  * This array is always allocated using av_malloc() by whoever constructs
537  * the frame. It is freed in av_frame_unref().
538  */
540  /**
541  * Number of elements in extended_buf.
542  */
544 
547 
548 /**
549  * @defgroup lavu_frame_flags AV_FRAME_FLAGS
550  * @ingroup lavu_frame
551  * Flags describing additional frame properties.
552  *
553  * @{
554  */
555 
556 /**
557  * The frame data may be corrupted, e.g. due to decoding errors.
558  */
559 #define AV_FRAME_FLAG_CORRUPT (1 << 0)
560 /**
561  * A flag to mark the frames which need to be decoded, but shouldn't be output.
562  */
563 #define AV_FRAME_FLAG_DISCARD (1 << 2)
564 /**
565  * @}
566  */
567 
568  /**
569  * Frame flags, a combination of @ref lavu_frame_flags
570  */
571  int flags;
572 
573  /**
574  * MPEG vs JPEG YUV range.
575  * - encoding: Set by user
576  * - decoding: Set by libavcodec
577  */
579 
581 
583 
584  /**
585  * YUV colorspace type.
586  * - encoding: Set by user
587  * - decoding: Set by libavcodec
588  */
590 
592 
593  /**
594  * frame timestamp estimated using various heuristics, in stream time base
595  * - encoding: unused
596  * - decoding: set by libavcodec, read by user.
597  */
599 
600  /**
601  * reordered pos from the last AVPacket that has been input into the decoder
602  * - encoding: unused
603  * - decoding: Read by user.
604  */
605  int64_t pkt_pos;
606 
607  /**
608  * duration of the corresponding packet, expressed in
609  * AVStream->time_base units, 0 if unknown.
610  * - encoding: unused
611  * - decoding: Read by user.
612  */
613  int64_t pkt_duration;
614 
615  /**
616  * metadata.
617  * - encoding: Set by user.
618  * - decoding: Set by libavcodec.
619  */
621 
622  /**
623  * decode error flags of the frame, set to a combination of
624  * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
625  * were errors during the decoding.
626  * - encoding: unused
627  * - decoding: set by libavcodec, read by user.
628  */
630 #define FF_DECODE_ERROR_INVALID_BITSTREAM 1
631 #define FF_DECODE_ERROR_MISSING_REFERENCE 2
632 #define FF_DECODE_ERROR_CONCEALMENT_ACTIVE 4
633 #define FF_DECODE_ERROR_DECODE_SLICES 8
634 
635 #if FF_API_OLD_CHANNEL_LAYOUT
636  /**
637  * number of audio channels, only used for audio.
638  * - encoding: unused
639  * - decoding: Read by user.
640  * @deprecated use ch_layout instead
641  */
643  int channels;
644 #endif
645 
646  /**
647  * size of the corresponding packet containing the compressed
648  * frame.
649  * It is set to a negative value if unknown.
650  * - encoding: unused
651  * - decoding: set by libavcodec, read by user.
652  */
653  int pkt_size;
654 
655  /**
656  * For hwaccel-format frames, this should be a reference to the
657  * AVHWFramesContext describing the frame.
658  */
660 
661  /**
662  * AVBufferRef for free use by the API user. FFmpeg will never check the
663  * contents of the buffer ref. FFmpeg calls av_buffer_unref() on it when
664  * the frame is unreferenced. av_frame_copy_props() calls create a new
665  * reference with av_buffer_ref() for the target frame's opaque_ref field.
666  *
667  * This is unrelated to the opaque field, although it serves a similar
668  * purpose.
669  */
671 
672  /**
673  * @anchor cropping
674  * @name Cropping
675  * Video frames only. The number of pixels to discard from the the
676  * top/bottom/left/right border of the frame to obtain the sub-rectangle of
677  * the frame intended for presentation.
678  * @{
679  */
680  size_t crop_top;
681  size_t crop_bottom;
682  size_t crop_left;
683  size_t crop_right;
684  /**
685  * @}
686  */
687 
688  /**
689  * AVBufferRef for internal use by a single libav* library.
690  * Must not be used to transfer data between libraries.
691  * Has to be NULL when ownership of the frame leaves the respective library.
692  *
693  * Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
694  *
695  * FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
696  * av_frame_copy_props() calls create a new reference with av_buffer_ref()
697  * for the target frame's private_ref field.
698  */
700 
701  /**
702  * Channel layout of the audio data.
703  */
705 } AVFrame;
706 
707 
708 #if FF_API_COLORSPACE_NAME
709 /**
710  * Get the name of a colorspace.
711  * @return a static string identifying the colorspace; can be NULL.
712  * @deprecated use av_color_space_name()
713  */
715 const char *av_get_colorspace_name(enum AVColorSpace val);
716 #endif
717 /**
718  * Allocate an AVFrame and set its fields to default values. The resulting
719  * struct must be freed using av_frame_free().
720  *
721  * @return An AVFrame filled with default values or NULL on failure.
722  *
723  * @note this only allocates the AVFrame itself, not the data buffers. Those
724  * must be allocated through other means, e.g. with av_frame_get_buffer() or
725  * manually.
726  */
728 
729 /**
730  * Free the frame and any dynamically allocated objects in it,
731  * e.g. extended_data. If the frame is reference counted, it will be
732  * unreferenced first.
733  *
734  * @param frame frame to be freed. The pointer will be set to NULL.
735  */
737 
738 /**
739  * Set up a new reference to the data described by the source frame.
740  *
741  * Copy frame properties from src to dst and create a new reference for each
742  * AVBufferRef from src.
743  *
744  * If src is not reference counted, new buffers are allocated and the data is
745  * copied.
746  *
747  * @warning: dst MUST have been either unreferenced with av_frame_unref(dst),
748  * or newly allocated with av_frame_alloc() before calling this
749  * function, or undefined behavior will occur.
750  *
751  * @return 0 on success, a negative AVERROR on error
752  */
753 int av_frame_ref(AVFrame *dst, const AVFrame *src);
754 
755 /**
756  * Create a new frame that references the same data as src.
757  *
758  * This is a shortcut for av_frame_alloc()+av_frame_ref().
759  *
760  * @return newly created AVFrame on success, NULL on error.
761  */
763 
764 /**
765  * Unreference all the buffers referenced by frame and reset the frame fields.
766  */
768 
769 /**
770  * Move everything contained in src to dst and reset src.
771  *
772  * @warning: dst is not unreferenced, but directly overwritten without reading
773  * or deallocating its contents. Call av_frame_unref(dst) manually
774  * before calling this function to ensure that no memory is leaked.
775  */
777 
778 /**
779  * Allocate new buffer(s) for audio or video data.
780  *
781  * The following fields must be set on frame before calling this function:
782  * - format (pixel format for video, sample format for audio)
783  * - width and height for video
784  * - nb_samples and ch_layout for audio
785  *
786  * This function will fill AVFrame.data and AVFrame.buf arrays and, if
787  * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
788  * For planar formats, one buffer will be allocated for each plane.
789  *
790  * @warning: if frame already has been allocated, calling this function will
791  * leak memory. In addition, undefined behavior can occur in certain
792  * cases.
793  *
794  * @param frame frame in which to store the new buffers.
795  * @param align Required buffer size alignment. If equal to 0, alignment will be
796  * chosen automatically for the current CPU. It is highly
797  * recommended to pass 0 here unless you know what you are doing.
798  *
799  * @return 0 on success, a negative AVERROR on error.
800  */
802 
803 /**
804  * Check if the frame data is writable.
805  *
806  * @return A positive value if the frame data is writable (which is true if and
807  * only if each of the underlying buffers has only one reference, namely the one
808  * stored in this frame). Return 0 otherwise.
809  *
810  * If 1 is returned the answer is valid until av_buffer_ref() is called on any
811  * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
812  *
813  * @see av_frame_make_writable(), av_buffer_is_writable()
814  */
816 
817 /**
818  * Ensure that the frame data is writable, avoiding data copy if possible.
819  *
820  * Do nothing if the frame is writable, allocate new buffers and copy the data
821  * if it is not.
822  *
823  * @return 0 on success, a negative AVERROR on error.
824  *
825  * @see av_frame_is_writable(), av_buffer_is_writable(),
826  * av_buffer_make_writable()
827  */
829 
830 /**
831  * Copy the frame data from src to dst.
832  *
833  * This function does not allocate anything, dst must be already initialized and
834  * allocated with the same parameters as src.
835  *
836  * This function only copies the frame data (i.e. the contents of the data /
837  * extended data arrays), not any other properties.
838  *
839  * @return >= 0 on success, a negative AVERROR on error.
840  */
841 int av_frame_copy(AVFrame *dst, const AVFrame *src);
842 
843 /**
844  * Copy only "metadata" fields from src to dst.
845  *
846  * Metadata for the purpose of this function are those fields that do not affect
847  * the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
848  * aspect ratio (for video), but not width/height or channel layout.
849  * Side data is also copied.
850  */
851 int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
852 
853 /**
854  * Get the buffer reference a given data plane is stored in.
855  *
856  * @param plane index of the data plane of interest in frame->extended_data.
857  *
858  * @return the buffer reference that contains the plane or NULL if the input
859  * frame is not valid.
860  */
862 
863 /**
864  * Add a new side data to a frame.
865  *
866  * @param frame a frame to which the side data should be added
867  * @param type type of the added side data
868  * @param size size of the side data
869  *
870  * @return newly added side data on success, NULL on error
871  */
873  enum AVFrameSideDataType type,
874  size_t size);
875 
876 /**
877  * Add a new side data to a frame from an existing AVBufferRef
878  *
879  * @param frame a frame to which the side data should be added
880  * @param type the type of the added side data
881  * @param buf an AVBufferRef to add as side data. The ownership of
882  * the reference is transferred to the frame.
883  *
884  * @return newly added side data on success, NULL on error. On failure
885  * the frame is unchanged and the AVBufferRef remains owned by
886  * the caller.
887  */
889  enum AVFrameSideDataType type,
890  AVBufferRef *buf);
891 
892 /**
893  * @return a pointer to the side data of a given type on success, NULL if there
894  * is no side data with such type in this frame.
895  */
897  enum AVFrameSideDataType type);
898 
899 /**
900  * Remove and free all side data instances of the given type.
901  */
903 
904 
905 /**
906  * Flags for frame cropping.
907  */
908 enum {
909  /**
910  * Apply the maximum possible cropping, even if it requires setting the
911  * AVFrame.data[] entries to unaligned pointers. Passing unaligned data
912  * to FFmpeg API is generally not allowed, and causes undefined behavior
913  * (such as crashes). You can pass unaligned data only to FFmpeg APIs that
914  * are explicitly documented to accept it. Use this flag only if you
915  * absolutely know what you are doing.
916  */
918 };
919 
920 /**
921  * Crop the given video AVFrame according to its crop_left/crop_top/crop_right/
922  * crop_bottom fields. If cropping is successful, the function will adjust the
923  * data pointers and the width/height fields, and set the crop fields to 0.
924  *
925  * In all cases, the cropping boundaries will be rounded to the inherent
926  * alignment of the pixel format. In some cases, such as for opaque hwaccel
927  * formats, the left/top cropping is ignored. The crop fields are set to 0 even
928  * if the cropping was rounded or ignored.
929  *
930  * @param frame the frame which should be cropped
931  * @param flags Some combination of AV_FRAME_CROP_* flags, or 0.
932  *
933  * @return >= 0 on success, a negative AVERROR on error. If the cropping fields
934  * were invalid, AVERROR(ERANGE) is returned, and nothing is changed.
935  */
937 
938 /**
939  * @return a string identifying the side data type
940  */
942 
943 /**
944  * @}
945  */
946 
947 #endif /* AVUTIL_FRAME_H */
#define attribute_deprecated
Definition: attributes.h:100
Convenience header that includes libavutil's core.
refcounted data buffer API
audio channel layout utility functions
static AVFrame * frame
Public dictionary API.
#define AV_NUM_DATA_POINTERS
Definition: frame.h:326
struct AVDictionary AVDictionary
Definition: dict.h:84
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
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_is_writable(AVFrame *frame)
Check if the frame data is writable.
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
const char * av_frame_side_data_name(enum AVFrameSideDataType type)
AVActiveFormatDescription
Definition: frame.h:214
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.
AVBufferRef * av_frame_get_plane_buffer(AVFrame *frame, int plane)
Get the buffer reference a given data plane is stored in.
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.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
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.
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
attribute_deprecated const char * av_get_colorspace_name(enum AVColorSpace val)
Get the name of a colorspace.
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
AVFrameSideData * av_frame_get_side_data(const AVFrame *frame, enum AVFrameSideDataType type)
AVFrameSideDataType
Definition: frame.h:49
AVFrameSideData * av_frame_new_side_data(AVFrame *frame, enum AVFrameSideDataType type, size_t size)
Add a new side data to a frame.
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.
@ AV_AFD_14_9
Definition: frame.h:218
@ AV_AFD_SAME
Definition: frame.h:215
@ AV_AFD_16_9_SP_14_9
Definition: frame.h:220
@ AV_AFD_4_3_SP_14_9
Definition: frame.h:219
@ AV_AFD_SP_4_3
Definition: frame.h:221
@ AV_AFD_4_3
Definition: frame.h:216
@ AV_AFD_16_9
Definition: frame.h:217
@ AV_FRAME_CROP_UNALIGNED
Apply the maximum possible cropping, even if it requires setting the AVFrame.data[] entries to unalig...
Definition: frame.h:917
@ 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_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_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:272
Libavutil version macros.
pixel format definitions
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:618
AVColorRange
Visual content value range.
Definition: pixfmt.h:564
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:471
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:496
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:525
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:231
enum AVFrameSideDataType type
Definition: frame.h:232
AVDictionary * metadata
Definition: frame.h:235
size_t size
Definition: frame.h:234
uint8_t * data
Definition: frame.h:233
AVBufferRef * buf
Definition: frame.h:236
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
int coded_picture_number
picture number in bitstream order
Definition: frame.h:452
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:405
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:432
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:598
int display_picture_number
picture number in display order
Definition: frame.h:456
size_t crop_right
Definition: frame.h:683
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
enum AVChromaLocation chroma_location
Definition: frame.h:591
int width
Definition: frame.h:397
AVBufferRef ** extended_buf
For planar audio which requires more than AV_NUM_DATA_POINTERS AVBufferRef pointers,...
Definition: frame.h:539
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame.
Definition: frame.h:659
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:417
AVRational time_base
Time base for the timestamps in this frame.
Definition: frame.h:447
int64_t pkt_duration
duration of the corresponding packet, expressed in AVStream->time_base units, 0 if unknown.
Definition: frame.h:613
void * opaque
for some private data of the user
Definition: frame.h:466
int64_t pkt_pos
reordered pos from the last AVPacket that has been input into the decoder
Definition: frame.h:605
int pkt_size
size of the corresponding packet containing the compressed frame.
Definition: frame.h:653
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:629
int height
Definition: frame.h:397
AVFrameSideData ** side_data
Definition: frame.h:545
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:571
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:525
attribute_deprecated int channels
number of audio channels, only used for audio.
Definition: frame.h:643
enum AVColorPrimaries color_primaries
Definition: frame.h:580
AVDictionary * metadata
metadata.
Definition: frame.h:620
int palette_has_changed
Tell user application that palette has changed from previous frame.
Definition: frame.h:487
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:427
AVBufferRef * private_ref
AVBufferRef for internal use by a single libav* library.
Definition: frame.h:699
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:482
attribute_deprecated uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:510
int quality
quality (between 1 (good) and FF_LAMBDA_MAX (bad))
Definition: frame.h:461
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:477
AVBufferRef * opaque_ref
AVBufferRef for free use by the API user.
Definition: frame.h:670
size_t crop_top
Definition: frame.h:680
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:578
int nb_side_data
Definition: frame.h:546
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:589
int nb_extended_buf
Number of elements in extended_buf.
Definition: frame.h:543
int64_t pkt_dts
DTS copied from the AVPacket that triggered returning this frame.
Definition: frame.h:439
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:370
size_t crop_left
Definition: frame.h:682
enum AVColorTransferCharacteristic color_trc
Definition: frame.h:582
int64_t reordered_opaque
reordered opaque 64 bits (generally an integer or a double precision float PTS but can be anything).
Definition: frame.h:497
int sample_rate
Sample rate of the audio data.
Definition: frame.h:502
AVChannelLayout ch_layout
Channel layout of the audio data.
Definition: frame.h:704
size_t crop_bottom
Definition: frame.h:681
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:412
int repeat_pict
When decoding, this signals how much the picture must be delayed.
Definition: frame.h:472
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:422
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:386
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Structure describing a single Region Of Interest.
Definition: frame.h:250
uint32_t self_size
Must be set to the size of this data structure (that is, sizeof(AVRegionOfInterest)).
Definition: frame.h:255
AVRational qoffset
Quantisation offset.
Definition: frame.h:292
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:265