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13 * Lesser General Public License for more details.
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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_NB , ///< Not part of ABI
44 #define AVCOL_SPC_YCGCO AVCOL_SPC_YCOCG
47 AVCOL_RANGE_UNSPECIFIED = 0,
48 AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges
49 AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges
50 AVCOL_RANGE_NB , ///< Not part of ABI
53 enum AVFrameSideDataType {
55 * The data is the AVPanScan struct defined in libavcodec.
57 AV_FRAME_DATA_PANSCAN,
60 typedef struct AVFrameSideData {
61 enum AVFrameSideDataType type;
64 AVDictionary *metadata;
68 * This structure describes decoded (raw) audio or video data.
70 * AVFrame must be allocated using av_frame_alloc(). Note that this only
71 * allocates the AVFrame itself, the buffers for the data must be managed
72 * through other means (see below).
73 * AVFrame must be freed with av_frame_free().
75 * AVFrame is typically allocated once and then reused multiple times to hold
76 * different data (e.g. a single AVFrame to hold frames received from a
77 * decoder). In such a case, av_frame_unref() will free any references held by
78 * the frame and reset it to its original clean state before it
81 * The data described by an AVFrame is usually reference counted through the
82 * AVBuffer API. The underlying buffer references are stored in AVFrame.buf /
83 * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at
84 * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case,
85 * every single data plane must be contained in one of the buffers in
86 * AVFrame.buf or AVFrame.extended_buf.
87 * There may be a single buffer for all the data, or one separate buffer for
88 * each plane, or anything in between.
90 * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added
91 * to the end with a minor bump.
92 * Similarly fields that are marked as to be only accessed by
93 * av_opt_ptr() can be reordered. This allows 2 forks to add fields
94 * without breaking compatibility with each other.
96 typedef struct AVFrame {
97 #define AV_NUM_DATA_POINTERS 8
99 * pointer to the picture/channel planes.
100 * This might be different from the first allocated byte
102 * Some decoders access areas outside 0,0 - width,height, please
103 * see avcodec_align_dimensions2(). Some filters and swscale can read
104 * up to 16 bytes beyond the planes, if these filters are to be used,
105 * then 16 extra bytes must be allocated.
107 uint8_t *data[AV_NUM_DATA_POINTERS];
110 * For video, size in bytes of each picture line.
111 * For audio, size in bytes of each plane.
113 * For audio, only linesize[0] may be set. For planar audio, each channel
114 * plane must be the same size.
116 * For video the linesizes should be multiplies of the CPUs alignment
117 * preference, this is 16 or 32 for modern desktop CPUs.
118 * Some code requires such alignment other code can be slower without
119 * correct alignment, for yet other it makes no difference.
121 * @note The linesize may be larger than the size of usable data -- there
122 * may be extra padding present for performance reasons.
124 int linesize[AV_NUM_DATA_POINTERS];
127 * pointers to the data planes/channels.
129 * For video, this should simply point to data[].
131 * For planar audio, each channel has a separate data pointer, and
132 * linesize[0] contains the size of each channel buffer.
133 * For packed audio, there is just one data pointer, and linesize[0]
134 * contains the total size of the buffer for all channels.
136 * Note: Both data and extended_data should always be set in a valid frame,
137 * but for planar audio with more channels that can fit in data,
138 * extended_data must be used in order to access all channels.
140 uint8_t **extended_data;
143 * width and height of the video frame
148 * number of audio samples (per channel) described by this frame
153 * format of the frame, -1 if unknown or unset
154 * Values correspond to enum AVPixelFormat for video frames,
155 * enum AVSampleFormat for audio)
160 * 1 -> keyframe, 0-> not
165 * Picture type of the frame.
167 enum AVPictureType pict_type;
169 #if FF_API_AVFRAME_LAVC
171 uint8_t *base[AV_NUM_DATA_POINTERS];
175 * Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
177 AVRational sample_aspect_ratio;
180 * Presentation timestamp in time_base units (time when frame should be shown to user).
185 * PTS copied from the AVPacket that was decoded to produce this frame.
190 * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isnt used)
191 * This is also the Presentation time of this AVFrame calculated from
192 * only AVPacket.dts values without pts values.
197 * picture number in bitstream order
199 int coded_picture_number;
201 * picture number in display order
203 int display_picture_number;
206 * quality (between 1 (good) and FF_LAMBDA_MAX (bad))
210 #if FF_API_AVFRAME_LAVC
218 int8_t *qscale_table;
229 * mbskip_table[mb]>=1 if MB didn't change
230 * stride= mb_width = (width+15)>>4
233 uint8_t *mbskip_table;
236 * motion vector table
239 * int mv_sample_log2= 4 - motion_subsample_log2;
240 * int mb_width= (width+15)>>4;
241 * int mv_stride= (mb_width << mv_sample_log2) + 1;
242 * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y];
246 int16_t (*motion_val[2])[2];
249 * macroblock type table
250 * mb_type_base + mb_width + 2
262 * motion reference frame index
263 * the order in which these are stored can depend on the codec.
266 int8_t *ref_index[2];
270 * for some private data of the user
277 uint64_t error[AV_NUM_DATA_POINTERS];
279 #if FF_API_AVFRAME_LAVC
285 * When decoding, this signals how much the picture must be delayed.
286 * extra_delay = repeat_pict / (2*fps)
291 * The content of the picture is interlaced.
293 int interlaced_frame;
296 * If the content is interlaced, is top field displayed first.
301 * Tell user application that palette has changed from previous frame.
303 int palette_has_changed;
305 #if FF_API_AVFRAME_LAVC
313 struct AVPanScan *pan_scan;
317 * reordered opaque 64bit (generally an integer or a double precision float
318 * PTS but can be anything).
319 * The user sets AVCodecContext.reordered_opaque to represent the input at
321 * the decoder reorders values as needed and sets AVFrame.reordered_opaque
322 * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque
323 * @deprecated in favor of pkt_pts
325 int64_t reordered_opaque;
327 #if FF_API_AVFRAME_LAVC
329 * @deprecated this field is unused
331 attribute_deprecated void *hwaccel_picture_private;
334 struct AVCodecContext *owner;
339 * log2 of the size of the block which a single vector in motion_val represents:
340 * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2)
343 uint8_t motion_subsample_log2;
347 * Sample rate of the audio data.
352 * Channel layout of the audio data.
354 uint64_t channel_layout;
357 * AVBuffer references backing the data for this frame. If all elements of
358 * this array are NULL, then this frame is not reference counted.
360 * There may be at most one AVBuffer per data plane, so for video this array
361 * always contains all the references. For planar audio with more than
362 * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in
363 * this array. Then the extra AVBufferRef pointers are stored in the
364 * extended_buf array.
366 AVBufferRef *buf[AV_NUM_DATA_POINTERS];
369 * For planar audio which requires more than AV_NUM_DATA_POINTERS
370 * AVBufferRef pointers, this array will hold all the references which
371 * cannot fit into AVFrame.buf.
373 * Note that this is different from AVFrame.extended_data, which always
374 * contains all the pointers. This array only contains the extra pointers,
375 * which cannot fit into AVFrame.buf.
377 * This array is always allocated using av_malloc() by whoever constructs
378 * the frame. It is freed in av_frame_unref().
380 AVBufferRef **extended_buf;
382 * Number of elements in extended_buf.
386 AVFrameSideData **side_data;
390 * frame timestamp estimated using various heuristics, in stream time base
391 * Code outside libavcodec should access this field using:
392 * av_frame_get_best_effort_timestamp(frame)
394 * - decoding: set by libavcodec, read by user.
396 int64_t best_effort_timestamp;
399 * reordered pos from the last AVPacket that has been input into the decoder
400 * Code outside libavcodec should access this field using:
401 * av_frame_get_pkt_pos(frame)
403 * - decoding: Read by user.
408 * duration of the corresponding packet, expressed in
409 * AVStream->time_base units, 0 if unknown.
410 * Code outside libavcodec should access this field using:
411 * av_frame_get_pkt_duration(frame)
413 * - decoding: Read by user.
415 int64_t pkt_duration;
419 * Code outside libavcodec should access this field using:
420 * av_frame_get_metadata(frame)
421 * - encoding: Set by user.
422 * - decoding: Set by libavcodec.
424 AVDictionary *metadata;
427 * decode error flags of the frame, set to a combination of
428 * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there
429 * were errors during the decoding.
430 * Code outside libavcodec should access this field using:
431 * av_frame_get_decode_error_flags(frame)
433 * - decoding: set by libavcodec, read by user.
435 int decode_error_flags;
436 #define FF_DECODE_ERROR_INVALID_BITSTREAM 1
437 #define FF_DECODE_ERROR_MISSING_REFERENCE 2
440 * number of audio channels, only used for audio.
441 * Code outside libavcodec should access this field using:
442 * av_frame_get_channels(frame)
444 * - decoding: Read by user.
449 * size of the corresponding packet containing the compressed
450 * frame. It must be accessed using av_frame_get_pkt_size() and
451 * av_frame_set_pkt_size().
452 * It is set to a negative value if unknown.
454 * - decoding: set by libavcodec, read by user.
459 * YUV colorspace type.
460 * It must be accessed using av_frame_get_colorspace() and
461 * av_frame_set_colorspace().
462 * - encoding: Set by user
463 * - decoding: Set by libavcodec
465 enum AVColorSpace colorspace;
468 * MPEG vs JPEG YUV range.
469 * It must be accessed using av_frame_get_color_range() and
470 * av_frame_set_color_range().
471 * - encoding: Set by user
472 * - decoding: Set by libavcodec
474 enum AVColorRange color_range;
478 * Not to be accessed directly from outside libavutil
480 AVBufferRef *qp_table_buf;
484 * Accessors for some AVFrame fields.
485 * The position of these field in the structure is not part of the ABI,
486 * they should not be accessed directly outside libavcodec.
488 int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame);
489 void av_frame_set_best_effort_timestamp(AVFrame *frame, int64_t val);
490 int64_t av_frame_get_pkt_duration (const AVFrame *frame);
491 void av_frame_set_pkt_duration (AVFrame *frame, int64_t val);
492 int64_t av_frame_get_pkt_pos (const AVFrame *frame);
493 void av_frame_set_pkt_pos (AVFrame *frame, int64_t val);
494 int64_t av_frame_get_channel_layout (const AVFrame *frame);
495 void av_frame_set_channel_layout (AVFrame *frame, int64_t val);
496 int av_frame_get_channels (const AVFrame *frame);
497 void av_frame_set_channels (AVFrame *frame, int val);
498 int av_frame_get_sample_rate (const AVFrame *frame);
499 void av_frame_set_sample_rate (AVFrame *frame, int val);
500 AVDictionary *av_frame_get_metadata (const AVFrame *frame);
501 void av_frame_set_metadata (AVFrame *frame, AVDictionary *val);
502 int av_frame_get_decode_error_flags (const AVFrame *frame);
503 void av_frame_set_decode_error_flags (AVFrame *frame, int val);
504 int av_frame_get_pkt_size(const AVFrame *frame);
505 void av_frame_set_pkt_size(AVFrame *frame, int val);
506 AVDictionary **avpriv_frame_get_metadatap(AVFrame *frame);
507 int8_t *av_frame_get_qp_table(AVFrame *f, int *stride, int *type);
508 int av_frame_set_qp_table(AVFrame *f, AVBufferRef *buf, int stride, int type);
509 enum AVColorSpace av_frame_get_colorspace(const AVFrame *frame);
510 void av_frame_set_colorspace(AVFrame *frame, enum AVColorSpace val);
511 enum AVColorRange av_frame_get_color_range(const AVFrame *frame);
512 void av_frame_set_color_range(AVFrame *frame, enum AVColorRange val);
515 * Get the name of a colorspace.
516 * @return a static string identifying the colorspace; can be NULL.
518 const char *av_get_colorspace_name(enum AVColorSpace val);
521 * Allocate an AVFrame and set its fields to default values. The resulting
522 * struct must be freed using av_frame_free().
524 * @return An AVFrame filled with default values or NULL on failure.
526 * @note this only allocates the AVFrame itself, not the data buffers. Those
527 * must be allocated through other means, e.g. with av_frame_get_buffer() or
530 AVFrame *av_frame_alloc(void);
533 * Free the frame and any dynamically allocated objects in it,
534 * e.g. extended_data. If the frame is reference counted, it will be
535 * unreferenced first.
537 * @param frame frame to be freed. The pointer will be set to NULL.
539 void av_frame_free(AVFrame **frame);
542 * Setup a new reference to the data described by a given frame.
544 * Copy frame properties from src to dst and create a new reference for each
545 * AVBufferRef from src.
547 * If src is not reference counted, new buffers are allocated and the data is
550 * @return 0 on success, a negative AVERROR on error
552 int av_frame_ref(AVFrame *dst, AVFrame *src);
555 * Create a new frame that references the same data as src.
557 * This is a shortcut for av_frame_alloc()+av_frame_ref().
559 * @return newly created AVFrame on success, NULL on error.
561 AVFrame *av_frame_clone(AVFrame *src);
564 * Unreference all the buffers referenced by frame and reset the frame fields.
566 void av_frame_unref(AVFrame *frame);
569 * Move everythnig contained in src to dst and reset src.
571 void av_frame_move_ref(AVFrame *dst, AVFrame *src);
574 * Allocate new buffer(s) for audio or video data.
576 * The following fields must be set on frame before calling this function:
577 * - format (pixel format for video, sample format for audio)
578 * - width and height for video
579 * - nb_samples and channel_layout for audio
581 * This function will fill AVFrame.data and AVFrame.buf arrays and, if
582 * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf.
583 * For planar formats, one buffer will be allocated for each plane.
585 * @param frame frame in which to store the new buffers.
586 * @param align required buffer size alignment
588 * @return 0 on success, a negative AVERROR on error.
590 int av_frame_get_buffer(AVFrame *frame, int align);
593 * Check if the frame data is writable.
595 * @return A positive value if the frame data is writable (which is true if and
596 * only if each of the underlying buffers has only one reference, namely the one
597 * stored in this frame). Return 0 otherwise.
599 * If 1 is returned the answer is valid until av_buffer_ref() is called on any
600 * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly).
602 * @see av_frame_make_writable(), av_buffer_is_writable()
604 int av_frame_is_writable(AVFrame *frame);
607 * Ensure that the frame data is writable, avoiding data copy if possible.
609 * Do nothing if the frame is writable, allocate new buffers and copy the data
612 * @return 0 on success, a negative AVERROR on error.
614 * @see av_frame_is_writable(), av_buffer_is_writable(),
615 * av_buffer_make_writable()
617 int av_frame_make_writable(AVFrame *frame);
620 * Copy only "metadata" fields from src to dst.
622 * Metadata for the purpose of this function are those fields that do not affect
623 * the data layout in the buffers. E.g. pts, sample rate (for audio) or sample
624 * aspect ratio (for video), but not width/height or channel layout.
625 * Side data is also copied.
627 int av_frame_copy_props(AVFrame *dst, const AVFrame *src);
630 * Get the buffer reference a given data plane is stored in.
632 * @param plane index of the data plane of interest in frame->extended_data.
634 * @return the buffer reference that contains the plane or NULL if the input
635 * frame is not valid.
637 AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane);
640 * Add a new side data to a frame.
642 * @param frame a frame to which the side data should be added
643 * @param type type of the added side data
644 * @param size size of the side data
646 * @return newly added side data on success, NULL on error
648 AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
649 enum AVFrameSideDataType type,
653 * @return a pointer to the side data of a given type on success, NULL if there
654 * is no side data with such type in this frame.
656 AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
657 enum AVFrameSideDataType type);
659 #endif /* AVUTIL_FRAME_H */