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Diffstat (limited to 'src/lib/ffmpeg-2.8/libavutil/frame.pas')
| -rw-r--r-- | src/lib/ffmpeg-2.8/libavutil/frame.pas | 849 |
1 files changed, 849 insertions, 0 deletions
diff --git a/src/lib/ffmpeg-2.8/libavutil/frame.pas b/src/lib/ffmpeg-2.8/libavutil/frame.pas new file mode 100644 index 00000000..66d727bb --- /dev/null +++ b/src/lib/ffmpeg-2.8/libavutil/frame.pas @@ -0,0 +1,849 @@ +(* + * AVOptions + * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * This is a part of Pascal porting of ffmpeg. + * - Originally by Victor Zinetz for Delphi and Free Pascal on Windows. + * - For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT + * in the source codes. + * - Changes and updates by the UltraStar Deluxe Team + * + * Conversion of libavutil/frame.h + * avutil version 54.7.100 + * +*) + +const + AV_NUM_DATA_POINTERS = 8; + + (** from the definitions of TAVFrame *) + + (** + * The frame data may be corrupted, e.g. due to decoding errors. + *) + AV_FRAME_FLAG_CORRUPT = (1 << 0); + + FF_DECODE_ERROR_INVALID_BITSTREAM = 1; + FF_DECODE_ERROR_MISSING_REFERENCE = 2; + + +type +(* is already in pixfmt.pas + TAVColorSpace = ( + AVCOL_SPC_RGB = 0, + AVCOL_SPC_BT709 = 1, ///< also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B + AVCOL_SPC_UNSPECIFIED = 2, + AVCOL_SPC_FCC = 4, + 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 + AVCOL_SPC_SMPTE170M = 6, ///< also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above + AVCOL_SPC_SMPTE240M_ = 7, + AVCOL_SPC_YCGCO = 8, ///< Used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16 + AVCOL_SPC_BT2020_NCL = 9, ///< ITU-R BT2020 non-constant luminance system + AVCOL_SPC_BT2020_CL = 10, ///< ITU-R BT2020 constant luminance system + AVCOL_SPC_NB ///< Not part of ABI + ); + + TAVColorRange = ( + AVCOL_RANGE_UNSPECIFIED = 0, + AVCOL_RANGE_MPEG = 1, ///< the normal 219*2^(n-8) "MPEG" YUV ranges + AVCOL_RANGE_JPEG = 2, ///< the normal 2^n-1 "JPEG" YUV ranges + AVCOL_RANGE_NB ///< Not part of ABI + ); +*) + +(* Note: AVPanScan is defined in avcodec.h but is here to avoid reference problems - Brian-ch 28/09/2014 + * + * Pan Scan area. + * This specifies the area which should be displayed. + * Note there may be multiple such areas for one frame. + *) + PAVPanScan = ^TAVPanScan; + TAVPanScan = record {24} + (*** id. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + id: cint; + + (*** width and height in 1/16 pel + * - encoding: set by user. + * - decoding: set by libavcodec. *) + width: cint; + height: cint; + + (*** position of the top left corner in 1/16 pel for up to 3 fields/frames. + * - encoding: set by user. + * - decoding: set by libavcodec. *) + position: array [0..2] of array [0..1] of cint16; + end; {TAVPanScan} + + (** + * @defgroup lavu_frame AVFrame + * @ingroup lavu_data + * + * @ + * AVFrame is an abstraction for reference-counted raw multimedia data. + *) + TAVFrameSideDataType = ( + (** + * The data is the AVPanScan struct defined in libavcodec. + *) + AV_FRAME_DATA_PANSCAN, + (** + * ATSC A53 Part 4 Closed Captions. + * A53 CC bitstream is stored as uint8_t in AVFrameSideData.data. + * The number of bytes of CC data is AVFrameSideData.size. + *) + AV_FRAME_DATA_A53_CC, + (** + * Stereoscopic 3d metadata. + * The data is the AVStereo3D struct defined in libavutil/stereo3d.h. + *) + AV_FRAME_DATA_STEREO3D, + (** + * The data is the AVMatrixEncoding enum defined in libavutil/channel_layout.h. + *) + AV_FRAME_DATA_MATRIXENCODING, + (** + * Metadata relevant to a downmix procedure. + * The data is the AVDownmixInfo struct defined in libavutil/downmix_info.h. + *) + AV_FRAME_DATA_DOWNMIX_INFO, + (** + * ReplayGain information in the form of the AVReplayGain struct. + *) + AV_FRAME_DATA_REPLAYGAIN, + (** + * This side data contains a 3x3 transformation matrix describing an affine + * transformation that needs to be applied to the frame for correct + * presentation. + * + * See libavutil/display.h for a detailed description of the data. + *) + AV_FRAME_DATA_DISPLAYMATRIX, + (** + * Active Format Description data consisting of a single byte as specified + * in ETSI TS 101 154 using AVActiveFormatDescription enum. + *) + AV_FRAME_DATA_AFD, + (** + * Motion vectors exported by some codecs (on demand through the export_mvs + * flag set in the libavcodec AVCodecContext flags2 option). + * The data is the AVMotionVector struct defined in + * libavutil/motion_vector.h. + *) + AV_FRAME_DATA_MOTION_VECTORS, + (** + * Recommmends skipping the specified number of samples. This is exported + * only if the "skip_manual" AVOption is set in libavcodec. + * This has the same format as AV_PKT_DATA_SKIP_SAMPLES. + * @code + * u32le number of samples to skip from start of this packet + * u32le number of samples to skip from end of this packet + * u8 reason for start skip + * u8 reason for end skip (0=padding silence, 1=convergence) + * @endcode + *) + AV_FRAME_DATA_SKIP_SAMPLES, + + (** + * This side data must be associated with an audio frame and corresponds to + * enum AVAudioServiceType defined in avcodec.h. + *) + AV_FRAME_DATA_AUDIO_SERVICE_TYPE + ); + + TAVActiveFormatDescription = ( + AV_AFD_SAME = 8, + AV_AFD_4_3 = 9, + AV_AFD_16_9 = 10, + AV_AFD_14_9 = 11, + AV_AFD_4_3_SP_14_9 = 13, + AV_AFD_16_9_SP_14_9 = 14, + AV_AFD_SP_4_3 = 15 + ); {TAVActiveFormatDescription} + + PAVFrameSideData = ^TAVFrameSideData; +(** + * Structure to hold side data for an AVFrame. + * + * sizeof(AVFrameSideData) is not a part of the public ABI, so new fields may be added + * to the end with a minor bump. + *) + TAVFrameSideData = record + type_: TAVFrameSideDataType; + data: PByte; + size: cint; + metadata: TAVDictionary; + buf: PAVBufferRef; + end; {TAVFrameSideData} + +(** + * This structure describes decoded (raw) audio or video data. + * + * AVFrame must be allocated using av_frame_alloc(). Note that this only + * allocates the AVFrame itself, the buffers for the data must be managed + * through other means (see below). + * AVFrame must be freed with av_frame_free(). + * + * AVFrame is typically allocated once and then reused multiple times to hold + * different data (e.g. a single AVFrame to hold frames received from a + * decoder). In such a case, av_frame_unref() will free any references held by + * the frame and reset it to its original clean state before it + * is reused again. + * + * The data described by an AVFrame is usually reference counted through the + * AVBuffer API. The underlying buffer references are stored in AVFrame.buf / + * AVFrame.extended_buf. An AVFrame is considered to be reference counted if at + * least one reference is set, i.e. if AVFrame.buf[0] != NULL. In such a case, + * every single data plane must be contained in one of the buffers in + * AVFrame.buf or AVFrame.extended_buf. + * There may be a single buffer for all the data, or one separate buffer for + * each plane, or anything in between. + * + * sizeof(AVFrame) is not a part of the public ABI, so new fields may be added + * to the end with a minor bump. + * Similarly fields that are marked as to be only accessed by + * av_opt_ptr() can be reordered. This allows 2 forks to add fields + * without breaking compatibility with each other. +*) + PPAVFrame = ^PAVFrame; + PAVFrame = ^TAVFrame; + TAVFrame = record + (** + * pointer to the picture/channel planes. + * This might be different from the first allocated byte + * + * Some decoders access areas outside 0,0 - width,height, please + * see avcodec_align_dimensions2(). Some filters and swscale can read + * up to 16 bytes beyond the planes, if these filters are to be used, + * then 16 extra bytes must be allocated. + *) + data: array [0..AV_NUM_DATA_POINTERS - 1] of pbyte; + + (** + * For video, size in bytes of each picture line. + * For audio, size in bytes of each plane. + * + * For audio, only linesize[0] may be set. For planar audio, each channel + * plane must be the same size. + * + * For video the linesizes should be multiples of the CPUs alignment + * preference, this is 16 or 32 for modern desktop CPUs. + * Some code requires such alignment other code can be slower without + * correct alignment, for yet other it makes no difference. + * + * @note The linesize may be larger than the size of usable data -- there + * may be extra padding present for performance reasons. + *) + linesize: array [0..AV_NUM_DATA_POINTERS - 1] of cint; + + (** + * pointers to the data planes/channels. + * + * For video, this should simply point to data[]. + * + * For planar audio, each channel has a separate data pointer, and + * linesize[0] contains the size of each channel buffer. + * For packed audio, there is just one data pointer, and linesize[0] + * contains the total size of the buffer for all channels. + * + * Note: Both data and extended_data will always be set by get_buffer(), + * but for planar audio with more channels that can fit in data, + * extended_data must be used in order to access all channels. + *) + extended_data: ^pbyte; + + (** + * width and height of the video frame + *) + width, height: cint; + (** + * number of audio samples (per channel) described by this frame + *) + nb_samples: cint; + + (** + * format of the frame, -1 if unknown or unset + * Values correspond to enum AVPixelFormat for video frames, + * enum AVSampleFormat for audio) + *) + format: cint; + + (** + * 1 -> keyframe, 0-> not + *) + key_frame: cint; + + (** + * Picture type of the frame + *) + pict_type: TAVPictureType; + +{$IFDEF FF_API_AVFRAME_LAVC} + base: array [0..AV_NUM_DATA_POINTERS - 1] of pbyte; {deprecated} +{$ENDIF} + + (** + * sample aspect ratio for the video frame, 0/1 if unknown/unspecified + *) + sample_aspect_ratio: TAVRational; + + (** + * presentation timestamp in time_base units (time when frame should be shown to user) + *) + pts: cint64; + + (** + * pts copied from the AVPacket that was decoded to produce this frame + *) + pkt_pts: cint64; + + (** + * DTS copied from the AVPacket that triggered returning this frame. (if frame threading isn't used) + * This is also the Presentation time of this AVFrame calculated from + * only AVPacket.dts values without pts values. + *) + pkt_dts: cint64; + + (** + * picture number in bitstream order + *) + coded_picture_number: cint; + + (** + * picture number in display order + *) + display_picture_number: cint; + + (** + * quality (between 1 (good) and FF_LAMBDA_MAX (bad)) + *) + quality: cint; + +{$IFDEF FF_API_AVFRAME_LAVC} + reference: cint; {deprecated} + + (** + * QP table + *) + qscale_table: pbyte; {deprecated} + + (** + * QP store stride + *) + qstride: cint; {deprecated} + qscale_type: cint; {deprecated} + + (** + * mbskip_table[mb]>=1 if MB didn't change + * stride= mb_width = (width+15)>>4 + *) + mbskip_table: pbyte; {deprecated} + + (** + * motion vector table + * @code + * example: + * int mv_sample_log2= 4 - motion_subsample_log2; + * int mb_width= (width+15)>>4; + * int mv_stride= (mb_width << mv_sample_log2) + 1; + * motion_val[direction][x + y*mv_stride][0->mv_x, 1->mv_y]; + * @endcode + *) + motion_val: array [0..1] of pointer; + + (** + * macroblock type table + * mb_type_base + mb_width + 2 + *) + mb_type: PCuint; {deprecated} + + (** + * DCT coefficients + *) + dct_coeff: PsmallInt; {deprecated} + + (** + * motion reference frame index + * the order in which these are stored can depend on the codec. + *) + ref_index: array [0..1] of pbyte; {deprecated} +{$ENDIF} + + (** + * for some private data of the user + *) + opaque: pointer; + + (** + * error + *) + error: array [0..AV_NUM_DATA_POINTERS - 1] of cuint64; + +{$IFDEF FF_API_AVFRAME_LAVC} + type_: cint; {deprecated} +{$ENDIF} + + (** + * When decoding, this signals how much the picture must be delayed. + * extra_delay = repeat_pict / (2*fps) + *) + repeat_pict: cint; + + (** + * The content of the picture is interlaced. + *) + interlaced_frame: cint; + + (** + * If the content is interlaced, is top field displayed first. + *) + top_field_first: cint; + + (** + * Tell user application that palette has changed from previous frame. + *) + palette_has_changed: cint; + +{$IFDEF FF_API_AVFRAME_LAVC} + buffer_hints: cint; {deprecated} + (** + * Pan scan. + *) + pan_scan: PAVPanScan; {deprecated} +{$ENDIF} + + (** + * reordered opaque 64bit (generally an integer or a double precision float + * PTS but can be anything). + * The user sets AVCodecContext.reordered_opaque to represent the input at + * that time, + * the decoder reorders values as needed and sets AVFrame.reordered_opaque + * to exactly one of the values provided by the user through AVCodecContext.reordered_opaque + * @deprecated in favor of pkt_pts + *) + reordered_opaque: cint64; + +{$IFDEF FF_API_AVFRAME_LAVC} + (** + * @deprecated this field is unused + *) + hwaccel_picture_private: pointer; {deprecated} + owner: pointer; {deprecated} (** Note: Should be a PAVCodecContext, but a type pointer is used to avoid a reference problem. *) + thread_opaque: pointer; {deprecated} + + (** + * log2 of the size of the block which a single vector in motion_val represents: + * (4->16x16, 3->8x8, 2-> 4x4, 1-> 2x2) + *) + motion_subsample_log2: cuint8; {deprecated} +{$ENDIF} + + (** + * Sample rate of the audio data. + *) + sample_rate: cint; + + (** + * Channel layout of the audio data. + *) + channel_layout: cuint64; + + (** + * AVBuffer references backing the data for this frame. If all elements of + * this array are NULL, then this frame is not reference counted. This array + * must be filled contiguously -- if buf[i] is non-NULL then buf[j] must + * also be non-NULL for all j < i. + * + * There may be at most one AVBuffer per data plane, so for video this array + * always contains all the references. For planar audio with more than + * AV_NUM_DATA_POINTERS channels, there may be more buffers than can fit in + * this array. Then the extra AVBufferRef pointers are stored in the + * extended_buf array. + *) + buf: array [0..AV_NUM_DATA_POINTERS - 1] of PAVBufferRef; + + (** + * For planar audio which requires more than AV_NUM_DATA_POINTERS + * AVBufferRef pointers, this array will hold all the references which + * cannot fit into AVFrame.buf. + * + * Note that this is different from AVFrame.extended_data, which always + * contains all the pointers. This array only contains the extra pointers, + * which cannot fit into AVFrame.buf. + * + * This array is always allocated using av_malloc() by whoever constructs + * the frame. It is freed in av_frame_unref(). + *) + extended_buf: PPAVBufferRef; + + (** + * Number of elements in extended_buf. + *) + nb_extended_buf: cint; + + side_data: ^PAVFrameSideData; + nb_side_data: cint; + + (** + * @defgroup lavu_frame_flags AV_FRAME_FLAGS + * Flags describing additional frame properties. + * + * @ + *) + + (** + * Frame flags, a combination of @ref lavu_frame_flags + *) + flags: cint; + + (** + * MPEG vs JPEG YUV range. + * It must be accessed using av_frame_get_color_range() and + * av_frame_set_color_range(). + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + color_range: TAVColorRange; + + color_primaries: TAVColorPrimaries; + + color_trc: TAVColorTransferCharacteristic; + + (** + * YUV colorspace type. + * It must be accessed using av_frame_get_colorspace() and + * av_frame_set_colorspace(). + * - encoding: Set by user + * - decoding: Set by libavcodec + *) + colorspace: TAVColorSpace; + + chroma_location: TAVChromaLocation; + + (** + * frame timestamp estimated using various heuristics, in stream time base + * Code outside libavutil should access this field using: + * av_frame_get_best_effort_timestamp(frame) + * - encoding: unused + * - decoding: set by libavcodec, read by user. + *) + best_effort_timestamp: cint64; + + (** + * reordered pos from the last AVPacket that has been input into the decoder + * Code outside libavutil should access this field using: + * av_frame_get_pkt_pos(frame) + * - encoding: unused + * - decoding: Read by user. + *) + pkt_pos: cint64; + + (** + * duration of the corresponding packet, expressed in + * AVStream->time_base units, 0 if unknown. + * Code outside libavutil should access this field using: + * av_frame_get_pkt_duration(frame) + * - encoding: unused + * - decoding: Read by user. + *) + pkt_duration: cint64; + + (** + * metadata. + * Code outside libavutil should access this field using: + * av_frame_get_metadata(frame) + * - encoding: Set by user. + * - decoding: Set by libavcodec. + *) + metadata: PAVDictionary; + + (** + * decode error flags of the frame, set to a combination of + * FF_DECODE_ERROR_xxx flags if the decoder produced a frame, but there + * were errors during the decoding. + * Code outside libavutil should access this field using: + * av_frame_get_decode_error_flags(frame) + * - encoding: unused + * - decoding: set by libavcodec, read by user. + *) + decode_error_flags: cint; + + (** + * number of audio channels, only used for audio. + * Code outside libavutil should access this field using: + * av_frame_get_channels(frame) + * - encoding: unused + * - decoding: Read by user. + *) + channels: cint; + + (** + * size of the corresponding packet containing the compressed + * frame. It must be accessed using av_frame_get_pkt_size() and + * av_frame_set_pkt_size(). + * It is set to a negative value if unknown. + * - encoding: unused + * - decoding: set by libavcodec, read by user. + *) + pkt_size: cint; + + (** + * Not to be accessed directly from outside libavutil + *) + qp_table_buf: PAVBufferRef; + end; {TAVFrame} + +(** + * Accessors for some AVFrame fields. + * The position of these field in the structure is not part of the ABI, + * they should not be accessed directly outside libavutil. + *) +function av_frame_get_best_effort_timestamp(frame: {const} PAVFrame): cint64; + cdecl; external av__codec; overload; +procedure av_frame_set_best_effort_timestamp(frame: PAVFrame; val: cint64); + cdecl; external av__codec; overload; +function av_frame_get_pkt_duration (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; overload; +procedure av_frame_get_pkt_duration (frame: PAVFrame; val: cint64); + cdecl; external av__codec; overload; +function av_frame_get_pkt_pos (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; overload; +procedure av_frame_get_pkt_pos (frame: PAVFrame; val: cint64); + cdecl; external av__codec; overload; +function av_frame_get_channel_layout (frame: {const} PAVFrame): cint64; + cdecl; external av__codec; overload; +procedure av_frame_get_channel_layout (frame: PAVFrame; val: cint64); + cdecl; external av__codec; overload; +function av_frame_get_channels (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_channels (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function av_frame_get_sample_rate (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_sample_rate (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function av_frame_get_metadata (frame: {const} PAVFrame): PAVDictionary; + cdecl; external av__codec; +procedure av_frame_set_metadata (frame: PAVFrame; val: PAVDictionary); + cdecl; external av__codec; +function av_frame_get_decode_error_flags (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_decode_error_flags (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function av_frame_get_pkt_size (frame: {const} PAVFrame): cint; + cdecl; external av__codec; +procedure av_frame_set_pkt_size (frame: PAVFrame; val: cint); + cdecl; external av__codec; +function avpriv_frame_get_metadatap(frame: PAVFrame): PPAVDictionary; + cdecl; external av__codec; +function av_frame_get_qp_table(f: PAVFrame; stride: pcint; type_: pcint): PByte; + cdecl; external av__codec; +function av_frame_set_qp_table(f: PAVFrame; buf: PAVBufferRef; stride: cint; type_: cint): cint; + cdecl; external av__codec; +function av_frame_get_colorspace(frame: {const} PAVFrame): TAVColorSpace; + cdecl; external av__codec; +procedure av_frame_set_colorspace(frame: PAVFrame; val: TAVColorSpace); + cdecl; external av__codec; +procedure av_frame_set_color_range(frame: PAVFrame; val: TAVColorSpace); + cdecl; external av__codec; + +(** + * Get the name of a colorspace. + * @return a static string identifying the colorspace; can be NULL. + *) +function av_get_colorspace_name(val: TAVColorSpace): PAnsiChar; + cdecl; external av__codec; + +(** + * Allocate an AVFrame and set its fields to default values. The resulting + * struct must be freed using av_frame_free(). + * + * @return An AVFrame filled with default values or NULL on failure. + * + * @note this only allocates the AVFrame itself, not the data buffers. Those + * must be allocated through other means, e.g. with av_frame_get_buffer() or + * manually. + *) +function av_frame_alloc(): PAVFrame; + cdecl; external av__codec; + +(** + * Free the frame and any dynamically allocated objects in it, + * e.g. extended_data. If the frame is reference counted, it will be + * unreferenced first. + * + * @param frame frame to be freed. The pointer will be set to NULL. + *) +procedure av_frame_free(frame: PPAVFrame); + cdecl; external av__codec; + +(** + * Set up a new reference to the data described by the source frame. + * + * Copy frame properties from src to dst and create a new reference for each + * AVBufferRef from src. + * + * If src is not reference counted, new buffers are allocated and the data is + * copied. + * + * @return 0 on success, a negative AVERROR on error + *) +function av_frame_ref(dst: PAVFrame; src: {const} PAVFrame): cint; + cdecl; external av__codec; + +(** + * Create a new frame that references the same data as src. + * + * This is a shortcut for av_frame_alloc()+av_frame_ref(). + * + * @return newly created AVFrame on success, NULL on error. + *) +function av_frame_clone(src: {const} PAVFrame): PAVFrame; + cdecl; external av__codec; + +(** + * Unreference all the buffers referenced by frame and reset the frame fields. + *) +procedure av_frame_unref(frame: PAVFrame); + cdecl; external av__codec; + +(** + * Move everything contained in src to dst and reset src. + *) +procedure av_frame_move_ref(dst, src: PAVFrame); + cdecl; external av__codec; + +(** + * Allocate new buffer(s) for audio or video data. + * + * The following fields must be set on frame before calling this function: + * - format (pixel format for video, sample format for audio) + * - width and height for video + * - nb_samples and channel_layout for audio + * + * This function will fill AVFrame.data and AVFrame.buf arrays and, if + * necessary, allocate and fill AVFrame.extended_data and AVFrame.extended_buf. + * For planar formats, one buffer will be allocated for each plane. + * + * @param frame frame in which to store the new buffers. + * @param align required buffer size alignment + * + * @return 0 on success, a negative AVERROR on error. + *) +function av_frame_get_buffer(frame: PAVFrame; align: cint): cint; + cdecl; external av__codec; + +(** + * Check if the frame data is writable. + * + * @return A positive value if the frame data is writable (which is true if and + * only if each of the underlying buffers has only one reference, namely the one + * stored in this frame). Return 0 otherwise. + * + * If 1 is returned the answer is valid until av_buffer_ref() is called on any + * of the underlying AVBufferRefs (e.g. through av_frame_ref() or directly). + * + * @see av_frame_make_writable(), av_buffer_is_writable() + *) +function av_frame_is_writable(frame: PAVFrame): cint; + cdecl; external av__codec; + +(** + * Ensure that the frame data is writable, avoiding data copy if possible. + * + * Do nothing if the frame is writable, allocate new buffers and copy the data + * if it is not. + * + * @return 0 on success, a negative AVERROR on error. + * + * @see av_frame_is_writable(), av_buffer_is_writable(), + * av_buffer_make_writable() + *) +function av_frame_make_writable(frame: PAVFrame): cint; + cdecl; external av__codec; + +(** + * Copy the frame data from src to dst. + * + * This function does not allocate anything, dst must be already initialized and + * allocated with the same parameters as src. + * + * This function only copies the frame data (i.e. the contents of the data / + * extended data arrays), not any other properties. + * + * @return >= 0 on success, a negative AVERROR on error. + *) +function av_frame_copy(dst: PAVFrame; src: {const} PAVFrame): cint; + cdecl; external av__codec; + +(** + * Copy only "metadata" fields from src to dst. + * + * Metadata for the purpose of this function are those fields that do not affect + * the data layout in the buffers. E.g. pts, sample rate (for audio) or sample + * aspect ratio (for video), but not width/height or channel layout. + * Side data is also copied. + *) +function av_frame_copy_props(dst: PAVFrame; src: {const} PAVFrame): cint; + cdecl; external av__codec; + +(** + * Get the buffer reference a given data plane is stored in. + * + * @param plane index of the data plane of interest in frame->extended_data. + * + * @return the buffer reference that contains the plane or NULL if the input + * frame is not valid. + *) +function av_frame_get_plane_buffer(frame: PAVFrame; plane: cint): PAVBufferRef; + cdecl; external av__codec; + +(** + * Add a new side data to a frame. + * + * @param frame a frame to which the side data should be added + * @param type type of the added side data + * @param size size of the side data + * + * @return newly added side data on success, NULL on error + *) +function av_frame_new_side_data(frame: PAVFrame; + type_: TAVFrameSideDataType; + size: cint): PAVFrameSideData; + cdecl; external av__codec; + +(** + * @return a pointer to the side data of a given type on success, NULL if there + * is no side data with such type in this frame. + *) +function av_frame_get_side_data(frame: {const} PAVFrame; type_: TAVFrameSideDataType): PAVFrameSideData; + cdecl; external av__codec; + +(** + * If side data of the supplied type exists in the frame, free it and remove it + * from the frame. + *) +procedure av_frame_remove_side_data(frame: PAVFrame; type_: TAVFrameSideDataType); + cdecl; external av__codec; + +(** + * @return a string identifying the side data type + *) +function av_frame_side_data_name(type_: TAVFrameSideDataType): PAnsiChar; + cdecl; external av__codec; + |