3 * This file is part of FFmpeg.
5 * FFmpeg is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
10 * FFmpeg is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with FFmpeg; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 #ifndef AVUTIL_FRAME_H
21 #define AVUTIL_FRAME_H
25 #include "libavcodec/version.h"
31 #include "samplefmt.h"
35 AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
36 AVCOL_SPC_UNSPECIFIED = 2,
38 AVCOL_SPC_BT470BG = 5, ///< also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
39 AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
40 AVCOL_SPC_SMPTE240M = 7,
41 AVCOL_SPC_YCOCG = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
42 AVCOL_SPC_BT2020_NCL = 9, ///< ITU-R BT2020 non-constant luminance system
43 AVCOL_SPC_BT2020_CL = 10, ///< ITU-R BT2020 constant luminance system
44 AVCOL_SPC_NB , ///< Not part of ABI
46 #define AVCOL_SPC_YCGCO AVCOL_SPC_YCOCG
49 AVCOL_RANGE_UNSPECIFIED = 0,
50 AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
51 AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
52 AVCOL_RANGE_NB , ///< Not part of ABI
56 enum AVFrameSideDataType {
58 * The data is the AVPanScan struct defined in libavcodec.
60 AV_FRAME_DATA_PANSCAN,
62 * ATSC A53 Part 4 Closed Captions.
63 * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data.
64 * The number of bytes of CC data is AVFrameSideData.size.
69 typedef struct AVFrameSideData {
70 enum AVFrameSideDataType type;
73 AVDictionary *metadata;
77 * This structure describes decoded (raw) audio or video data.
79 * AVFrame must be allocated using av_frame_alloc(). Note that this only
80 * allocates the AVFrame itself, the buffers for the data must be managed
81 * through other means (see below).
82 * AVFrame must be freed with av_frame_free().
84 * AVFrame is typically allocated once and then reused multiple times to hold
85 * different data (e.g. a single AVFrame to hold frames received from a
86 * decoder). In such a case, av_frame_unref() will free any references held by
87 * the frame and reset it to its original clean state before it
90 * The data described by an AVFrame is usually reference counted through the
91 * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
92 * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
93 * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
94 * every single data plane must be contained in one of the buffers in
95 * AVFrame.buf or AVFrame.extended_buf.
96 * There may be a single buffer for all the data, or one separate buffer for
97 * each plane, or anything in between.
99 * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
100 * to the end with a minor bump.
101 * Similarly fields that are marked as to be only accessed by
102 * av_opt_ptr() can be reordered. This allows 2 forks to add fields
103 * without breaking compatibility with each other.
105 typedef struct AVFrame {
106 #define AV_NUM_DATA_POINTERS 8
108 * pointer to the picture/channel planes.
109 * This might be different from the first allocated byte
111 * Some decoders access areas outside 0,0 - width,height, please
112 * see avcodec_align_dimensions2(). Some filters and swscale can read
113 * up to 16 bytes beyond the planes, if these filters are to be used,
114 * then 16 extra bytes must be allocated.
116 uint8_t *data[AV_NUM_DATA_POINTERS];
119 * For video, size in bytes of each picture line.
120 * For audio, size in bytes of each plane.
122 * For audio, only linesize[0] may be set. For planar audio, each channel
123 * plane must be the same size.
125 * For video the linesizes should be multiplies of the CPUs alignment
126 * preference, this is 16 or 32 for modern desktop CPUs.
127 * Some code requires such alignment other code can be slower without
128 * correct alignment, for yet other it makes no difference.
130 * @note The linesize may be larger than the size of usable data -- there
131 * may be extra padding present for performance reasons.
133 int linesize[AV_NUM_DATA_POINTERS];
136 * pointers to the data planes/channels.
138 * For video, this should simply point to data[].
140 * For planar audio, each channel has a separate data pointer, and
141 * linesize[0] contains the size of each channel buffer.
142 * For packed audio, there is just one data pointer, and linesize[0]
143 * contains the total size of the buffer for all channels.
145 * Note: Both data and extended_data should always be set in a valid frame,
146 * but for planar audio with more channels that can fit in data,
147 * extended_data must be used in order to access all channels.
149 uint8_t **extended_data;
152 * width and height of the video frame
157 * number of audio samples (per channel) described by this frame
162 * format of the frame, -1 if unknown or unset
163 * Values correspond to enum AVPixelFormat for video frames,
164 * enum AVSampleFormat for audio)
169 * 1 -> keyframe, 0-> not
174 * Picture type of the frame.
176 enum AVPictureType pict_type;
178 #if FF_API_AVFRAME_LAVC
180 uint8_t *base[AV_NUM_DATA_POINTERS];
184 * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
186 AVRational sample_aspect_ratio;
189 * Presentation timestamp in time_base units (time when frame should be shown to user).
194 * PTS copied from the AVPacket that was decoded to produce this frame.
199 * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isnt used)
200 * This is also the Presentation time of this AVFrame calculated from
201 * only AVPacket.dts values without pts values.
206 * picture number in bitstream order
208 int coded_picture_number;
210 * picture number in display order
212 int display_picture_number;
215 * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
219 #if FF_API_AVFRAME_LAVC
227 int8_t *qscale_table;
238 * mbskip_table[mb]>=1 if MB didn't change
239 * stride= mb_width = (width+15)>>4
242 uint8_t *mbskip_table;
245 * motion vector table
248 * int mv_sample_log2= 4 - motion_subsample_log2;
249 * int mb_width= (width+15)>>4;
250 * int mv_stride= (mb_width << mv_sample_log2) + 1;
251 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
255 int16_t (*motion_val[2])[2];
258 * macroblock type table
259 * mb_type_base + mb_width + 2
271 * motion reference frame index
272 * the order in which these are stored can depend on the codec.
275 int8_t *ref_index[2];
279 * for some private data of the user
286 uint64_t error[AV_NUM_DATA_POINTERS];
288 #if FF_API_AVFRAME_LAVC
294 * When decoding, this signals how much the picture must be delayed.
295 * extra_delay = repeat_pict / (2*fps)
300 * The content of the picture is interlaced.
302 int interlaced_frame;
305 * If the content is interlaced, is top field displayed first.
310 * Tell user application that palette has changed from previous frame.
312 int palette_has_changed;
314 #if FF_API_AVFRAME_LAVC
322 struct AVPanScan *pan_scan;
326 * reordered opaque 64bit (generally an integer or a double precision float
327 * PTS but can be anything).
328 * The user sets AVCodecContext.reordered_opaque to represent the input at
330 * the decoder reorders values as needed and sets AVFrame.reordered_opaque
331 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
332 * @deprecated in favor of pkt_pts
334 int64_t reordered_opaque;
336 #if FF_API_AVFRAME_LAVC
338 * @deprecated this field is unused
340 attribute_deprecated void *hwaccel_picture_private;
343 struct AVCodecContext *owner;
348 * log2 of the size of the block which a single vector in motion_val represents:
349 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
352 uint8_t motion_subsample_log2;
356 * Sample rate of the audio data.
361 * Channel layout of the audio data.
363 uint64_t channel_layout;
366 * AVBuffer references backing the data for this frame. If all elements of
367 * this array are NULL, then this frame is not reference counted.
369 * There may be at most one AVBuffer per data plane, so for video this array
370 * always contains all the references. For planar audio with more than
371 * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
372 * this array. Then the extra AVBufferRef pointers are stored in the
373 * extended_buf array.
375 AVBufferRef *buf[AV_NUM_DATA_POINTERS];
378 * For planar audio which requires more than AV_NUM_DATA_POINTERS
379 * AVBufferRef pointers, this array will hold all the references which
380 * cannot fit into AVFrame.buf.
382 * Note that this is different from AVFrame.extended_data, which always
383 * contains all the pointers. This array only contains the extra pointers,
384 * which cannot fit into AVFrame.buf.
386 * This array is always allocated using av_malloc() by whoever constructs
387 * the frame. It is freed in av_frame_unref().
389 AVBufferRef **extended_buf;
391 * Number of elements in extended_buf.
395 AVFrameSideData **side_data;
399 * The frame data may be corrupted, e.g. due to decoding errors.
401 #define AV_FRAME_FLAG_CORRUPT (1 << 0)
404 * Frame flags, a combination of AV_FRAME_FLAG_*
409 * frame timestamp estimated using various heuristics, in stream time base
410 * Code outside libavcodec should access this field using:
411 * av_frame_get_best_effort_timestamp(frame)
413 * - decoding: set by libavcodec, read by user.
415 int64_t best_effort_timestamp;
418 * reordered pos from the last AVPacket that has been input into the decoder
419 * Code outside libavcodec should access this field using:
420 * av_frame_get_pkt_pos(frame)
422 * - decoding: Read by user.
427 * duration of the corresponding packet, expressed in
428 * AVStream->time_base units, 0 if unknown.
429 * Code outside libavcodec should access this field using:
430 * av_frame_get_pkt_duration(frame)
432 * - decoding: Read by user.
434 int64_t pkt_duration;
438 * Code outside libavcodec should access this field using:
439 * av_frame_get_metadata(frame)
440 * - encoding: Set by user.
441 * - decoding: Set by libavcodec.
443 AVDictionary *metadata;
446 * decode error flags of the frame, set to a combination of
447 * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
448 * were errors during the decoding.
449 * Code outside libavcodec should access this field using:
450 * av_frame_get_decode_error_flags(frame)
452 * - decoding: set by libavcodec, read by user.
454 int decode_error_flags;
455 #define FF_DECODE_ERROR_INVALID_BITSTREAM 1
456 #define FF_DECODE_ERROR_MISSING_REFERENCE 2
459 * number of audio channels, only used for audio.
460 * Code outside libavcodec should access this field using:
461 * av_frame_get_channels(frame)
463 * - decoding: Read by user.
468 * size of the corresponding packet containing the compressed
469 * frame. It must be accessed using av_frame_get_pkt_size() and
470 * av_frame_set_pkt_size().
471 * It is set to a negative value if unknown.
473 * - decoding: set by libavcodec, read by user.
478 * YUV colorspace type.
479 * It must be accessed using av_frame_get_colorspace() and
480 * av_frame_set_colorspace().
481 * - encoding: Set by user
482 * - decoding: Set by libavcodec
484 enum AVColorSpace colorspace;
487 * MPEG vs JPEG YUV range.
488 * It must be accessed using av_frame_get_color_range() and
489 * av_frame_set_color_range().
490 * - encoding: Set by user
491 * - decoding: Set by libavcodec
493 enum AVColorRange color_range;
497 * Not to be accessed directly from outside libavutil
499 AVBufferRef *qp_table_buf;
503 * Accessors for some AVFrame fields.
504 * The position of these field in the structure is not part of the ABI,
505 * they should not be accessed directly outside libavcodec.
507 int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame);
508 void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val);
509 int64_t av_frame_get_pkt_duration (const AVFrame *frame);
510 void av_frame_set_pkt_duration (AVFrame *frame, int64_t val);
511 int64_t av_frame_get_pkt_pos (const AVFrame *frame);
512 void av_frame_set_pkt_pos (AVFrame *frame, int64_t val);
513 int64_t av_frame_get_channel_layout (const AVFrame *frame);
514 void av_frame_set_channel_layout (AVFrame *frame, int64_t val);
515 int av_frame_get_channels (const AVFrame *frame);
516 void av_frame_set_channels (AVFrame *frame, int val);
517 int av_frame_get_sample_rate (const AVFrame *frame);
518 void av_frame_set_sample_rate (AVFrame *frame, int val);
519 AVDictionary *av_frame_get_metadata (const AVFrame *frame);
520 void av_frame_set_metadata (AVFrame *frame, AVDictionary *val);
521 int av_frame_get_decode_error_flags (const AVFrame *frame);
522 void av_frame_set_decode_error_flags (AVFrame *frame, int val);
523 int av_frame_get_pkt_size(const AVFrame *frame);
524 void av_frame_set_pkt_size(AVFrame *frame, int val);
525 AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame);
526 int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type);
527 int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int type);
528 enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame);
529 void av_frame_set_colorspace(AVFrame *frame, enum AVColorSpace val);
530 enum AVColorRange av_frame_get_color_range(const AVFrame *frame);
531 void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val);
534 * Get the name of a colorspace.
535 * @return a static string identifying the colorspace; can be NULL.
537 const char *av_get_colorspace_name(enum AVColorSpace val);
540 * Allocate an AVFrame and set its fields to default values. The resulting
541 * struct must be freed using av_frame_free().
543 * @return An AVFrame filled with default values or NULL on failure.
545 * @note this only allocates the AVFrame itself, not the data buffers. Those
546 * must be allocated through other means, e.g. with av_frame_get_buffer() or
549 AVFrame *av_frame_alloc(void);
552 * Free the frame and any dynamically allocated objects in it,
553 * e.g. extended_data. If the frame is reference counted, it will be
554 * unreferenced first.
556 * @param frame frame to be freed. The pointer will be set to NULL.
558 void av_frame_free(AVFrame **frame);
561 * Setup a new reference to the data described by a given frame.
563 * Copy frame properties from src to dst and create a new reference for each
564 * AVBufferRef from src.
566 * If src is not reference counted, new buffers are allocated and the data is
569 * @return 0 on success, a negative AVERROR on error
571 int av_frame_ref(AVFrame *dst, const AVFrame *src);
574 * Create a new frame that references the same data as src.
576 * This is a shortcut for av_frame_alloc()+av_frame_ref().
578 * @return newly created AVFrame on success, NULL on error.
580 AVFrame *av_frame_clone(const AVFrame *src);
583 * Unreference all the buffers referenced by frame and reset the frame fields.
585 void av_frame_unref(AVFrame *frame);
588 * Move everythnig contained in src to dst and reset src.
590 void av_frame_move_ref(AVFrame *dst, AVFrame *src);
593 * Allocate new buffer(s) for audio or video data.
595 * The following fields must be set on frame before calling this function:
596 * - format (pixel format for video, sample format for audio)
597 * - width and height for video
598 * - nb_samples and channel_layout for audio
600 * This function will fill AVFrame.data and AVFrame.buf arrays and, if
601 * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
602 * For planar formats, one buffer will be allocated for each plane.
604 * @param frame frame in which to store the new buffers.
605 * @param align required buffer size alignment
607 * @return 0 on success, a negative AVERROR on error.
609 int av_frame_get_buffer(AVFrame *frame, int align);
612 * Check if the frame data is writable.
614 * @return A positive value if the frame data is writable (which is true if and
615 * only if each of the underlying buffers has only one reference, namely the one
616 * stored in this frame). Return 0 otherwise.
618 * If 1 is returned the answer is valid until av_buffer_ref() is called on any
619 * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
621 * @see av_frame_make_writable(), av_buffer_is_writable()
623 int av_frame_is_writable(AVFrame *frame);
626 * Ensure that the frame data is writable, avoiding data copy if possible.
628 * Do nothing if the frame is writable, allocate new buffers and copy the data
631 * @return 0 on success, a negative AVERROR on error.
633 * @see av_frame_is_writable(), av_buffer_is_writable(),
634 * av_buffer_make_writable()
636 int av_frame_make_writable(AVFrame *frame);
639 * Copy only "metadata" fields from src to dst.
641 * Metadata for the purpose of this function are those fields that do not affect
642 * the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
643 * aspect ratio (for video), but not width/height or channel layout.
644 * Side data is also copied.
646 int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
649 * Get the buffer reference a given data plane is stored in.
651 * @param plane index of the data plane of interest in frame->extended_data.
653 * @return the buffer reference that contains the plane or NULL if the input
654 * frame is not valid.
656 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane);
659 * Add a new side data to a frame.
661 * @param frame a frame to which the side data should be added
662 * @param type type of the added side data
663 * @param size size of the side data
665 * @return newly added side data on success, NULL on error
667 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
668 enum AVFrameSideDataType type,
672 * @return a pointer to the side data of a given type on success, NULL if there
673 * is no side data with such type in this frame.
675 AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
676 enum AVFrameSideDataType type);
678 #endif /* AVUTIL_FRAME_H */