diff mbox series

[FFmpeg-devel,1/3] avcodec.h: split AVPacket API into its own header

Message ID 20200408074258.3472-1-anton@khirnov.net
State Accepted
Headers show
Series [FFmpeg-devel,1/3] avcodec.h: split AVPacket API into its own header
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andriy/ffmpeg-patchwork pending
andriy/ffmpeg-patchwork success Applied patch
andriy/ffmpeg-patchwork success Configure finished
andriy/ffmpeg-patchwork success Make finished
andriy/ffmpeg-patchwork success Make fate finished

Commit Message

Anton Khirnov April 8, 2020, 7:42 a.m. UTC
---
 doc/APIchanges        |   3 +
 libavcodec/Makefile   |   1 +
 libavcodec/avcodec.h  | 688 +---------------------------------------
 libavcodec/avpacket.c |   3 +-
 libavcodec/packet.h   | 713 ++++++++++++++++++++++++++++++++++++++++++
 libavcodec/version.h  |   4 +-
 6 files changed, 722 insertions(+), 690 deletions(-)
 create mode 100644 libavcodec/packet.h

Comments

James Almer April 8, 2020, 1:37 p.m. UTC | #1
On 4/8/2020 4:42 AM, Anton Khirnov wrote:
> ---
>  doc/APIchanges        |   3 +
>  libavcodec/Makefile   |   1 +
>  libavcodec/avcodec.h  | 688 +---------------------------------------
>  libavcodec/avpacket.c |   3 +-
>  libavcodec/packet.h   | 713 ++++++++++++++++++++++++++++++++++++++++++
>  libavcodec/version.h  |   4 +-
>  6 files changed, 722 insertions(+), 690 deletions(-)
>  create mode 100644 libavcodec/packet.h
> 
> diff --git a/doc/APIchanges b/doc/APIchanges
> index f1d7eac2ee..1b301bc20b 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -15,6 +15,9 @@ libavutil:     2017-10-21
>  
>  API changes, most recent first:
>  
> +2020-xx-xx - xxxxxxxxxx - lavc 58.78.100 - avcodec.h packet.h
> +  Move AVPacket-related public API to new header packet.h.
> +

LGTM (i think the doxy groups remain the same after this change).
diff mbox series

Patch

diff --git a/doc/APIchanges b/doc/APIchanges
index f1d7eac2ee..1b301bc20b 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,6 +15,9 @@  libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2020-xx-xx - xxxxxxxxxx - lavc 58.78.100 - avcodec.h packet.h
+  Move AVPacket-related public API to new header packet.h.
+
 2020-03-29 - xxxxxxxxxx - lavf 58.42.100 - avformat.h
   av_read_frame() now guarantees to handle uninitialized input packets
   and to return refcounted packets on success.
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index c1c9a44f2b..24a0436ca5 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -12,6 +12,7 @@  HEADERS = ac3_parser.h                                                  \
           dxva2.h                                                       \
           jni.h                                                         \
           mediacodec.h                                                  \
+          packet.h                                                      \
           qsv.h                                                         \
           vaapi.h                                                       \
           vdpau.h                                                       \
diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 8fc0ad92c9..2bbbec2d8c 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -41,6 +41,7 @@ 
 #include "libavutil/pixfmt.h"
 #include "libavutil/rational.h"
 
+#include "packet.h"
 #include "version.h"
 
 /**
@@ -1218,382 +1219,6 @@  typedef struct AVProducerReferenceTime {
  */
 #define AV_GET_BUFFER_FLAG_REF (1 << 0)
 
-/**
- * @defgroup lavc_packet AVPacket
- *
- * Types and functions for working with AVPacket.
- * @{
- */
-enum AVPacketSideDataType {
-    /**
-     * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE
-     * bytes worth of palette. This side data signals that a new palette is
-     * present.
-     */
-    AV_PKT_DATA_PALETTE,
-
-    /**
-     * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format
-     * that the extradata buffer was changed and the receiving side should
-     * act upon it appropriately. The new extradata is embedded in the side
-     * data buffer and should be immediately used for processing the current
-     * frame or packet.
-     */
-    AV_PKT_DATA_NEW_EXTRADATA,
-
-    /**
-     * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
-     * @code
-     * u32le param_flags
-     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
-     *     s32le channel_count
-     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
-     *     u64le channel_layout
-     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
-     *     s32le sample_rate
-     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
-     *     s32le width
-     *     s32le height
-     * @endcode
-     */
-    AV_PKT_DATA_PARAM_CHANGE,
-
-    /**
-     * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
-     * structures with info about macroblocks relevant to splitting the
-     * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
-     * That is, it does not necessarily contain info about all macroblocks,
-     * as long as the distance between macroblocks in the info is smaller
-     * than the target payload size.
-     * Each MB info structure is 12 bytes, and is laid out as follows:
-     * @code
-     * u32le bit offset from the start of the packet
-     * u8    current quantizer at the start of the macroblock
-     * u8    GOB number
-     * u16le macroblock address within the GOB
-     * u8    horizontal MV predictor
-     * u8    vertical MV predictor
-     * u8    horizontal MV predictor for block number 3
-     * u8    vertical MV predictor for block number 3
-     * @endcode
-     */
-    AV_PKT_DATA_H263_MB_INFO,
-
-    /**
-     * This side data should be associated with an audio stream and contains
-     * ReplayGain information in form of the AVReplayGain struct.
-     */
-    AV_PKT_DATA_REPLAYGAIN,
-
-    /**
-     * This side data contains a 3x3 transformation matrix describing an affine
-     * transformation that needs to be applied to the decoded video frames for
-     * correct presentation.
-     *
-     * See libavutil/display.h for a detailed description of the data.
-     */
-    AV_PKT_DATA_DISPLAYMATRIX,
-
-    /**
-     * This side data should be associated with a video stream and contains
-     * Stereoscopic 3D information in form of the AVStereo3D struct.
-     */
-    AV_PKT_DATA_STEREO3D,
-
-    /**
-     * This side data should be associated with an audio stream and corresponds
-     * to enum AVAudioServiceType.
-     */
-    AV_PKT_DATA_AUDIO_SERVICE_TYPE,
-
-    /**
-     * This side data contains quality related information from the encoder.
-     * @code
-     * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
-     * u8    picture type
-     * u8    error count
-     * u16   reserved
-     * u64le[error count] sum of squared differences between encoder in and output
-     * @endcode
-     */
-    AV_PKT_DATA_QUALITY_STATS,
-
-    /**
-     * This side data contains an integer value representing the stream index
-     * of a "fallback" track.  A fallback track indicates an alternate
-     * track to use when the current track can not be decoded for some reason.
-     * e.g. no decoder available for codec.
-     */
-    AV_PKT_DATA_FALLBACK_TRACK,
-
-    /**
-     * This side data corresponds to the AVCPBProperties struct.
-     */
-    AV_PKT_DATA_CPB_PROPERTIES,
-
-    /**
-     * Recommmends skipping the specified number of 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_PKT_DATA_SKIP_SAMPLES,
-
-    /**
-     * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
-     * the packet may contain "dual mono" audio specific to Japanese DTV
-     * and if it is true, recommends only the selected channel to be used.
-     * @code
-     * u8    selected channels (0=mail/left, 1=sub/right, 2=both)
-     * @endcode
-     */
-    AV_PKT_DATA_JP_DUALMONO,
-
-    /**
-     * A list of zero terminated key/value strings. There is no end marker for
-     * the list, so it is required to rely on the side data size to stop.
-     */
-    AV_PKT_DATA_STRINGS_METADATA,
-
-    /**
-     * Subtitle event position
-     * @code
-     * u32le x1
-     * u32le y1
-     * u32le x2
-     * u32le y2
-     * @endcode
-     */
-    AV_PKT_DATA_SUBTITLE_POSITION,
-
-    /**
-     * Data found in BlockAdditional element of matroska container. There is
-     * no end marker for the data, so it is required to rely on the side data
-     * size to recognize the end. 8 byte id (as found in BlockAddId) followed
-     * by data.
-     */
-    AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
-
-    /**
-     * The optional first identifier line of a WebVTT cue.
-     */
-    AV_PKT_DATA_WEBVTT_IDENTIFIER,
-
-    /**
-     * The optional settings (rendering instructions) that immediately
-     * follow the timestamp specifier of a WebVTT cue.
-     */
-    AV_PKT_DATA_WEBVTT_SETTINGS,
-
-    /**
-     * A list of zero terminated key/value strings. There is no end marker for
-     * the list, so it is required to rely on the side data size to stop. This
-     * side data includes updated metadata which appeared in the stream.
-     */
-    AV_PKT_DATA_METADATA_UPDATE,
-
-    /**
-     * MPEGTS stream ID as uint8_t, this is required to pass the stream ID
-     * information from the demuxer to the corresponding muxer.
-     */
-    AV_PKT_DATA_MPEGTS_STREAM_ID,
-
-    /**
-     * Mastering display metadata (based on SMPTE-2086:2014). This metadata
-     * should be associated with a video stream and contains data in the form
-     * of the AVMasteringDisplayMetadata struct.
-     */
-    AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
-
-    /**
-     * This side data should be associated with a video stream and corresponds
-     * to the AVSphericalMapping structure.
-     */
-    AV_PKT_DATA_SPHERICAL,
-
-    /**
-     * Content light level (based on CTA-861.3). This metadata should be
-     * associated with a video stream and contains data in the form of the
-     * AVContentLightMetadata struct.
-     */
-    AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
-
-    /**
-     * ATSC A53 Part 4 Closed Captions. This metadata should be associated with
-     * a video stream. A53 CC bitstream is stored as uint8_t in AVPacketSideData.data.
-     * The number of bytes of CC data is AVPacketSideData.size.
-     */
-    AV_PKT_DATA_A53_CC,
-
-    /**
-     * This side data is encryption initialization data.
-     * The format is not part of ABI, use av_encryption_init_info_* methods to
-     * access.
-     */
-    AV_PKT_DATA_ENCRYPTION_INIT_INFO,
-
-    /**
-     * This side data contains encryption info for how to decrypt the packet.
-     * The format is not part of ABI, use av_encryption_info_* methods to access.
-     */
-    AV_PKT_DATA_ENCRYPTION_INFO,
-
-    /**
-     * Active Format Description data consisting of a single byte as specified
-     * in ETSI TS 101 154 using AVActiveFormatDescription enum.
-     */
-    AV_PKT_DATA_AFD,
-
-    /**
-     * Producer Reference Time data corresponding to the AVProducerReferenceTime struct,
-     * usually exported by some encoders (on demand through the prft flag set in the
-     * AVCodecContext export_side_data field).
-     */
-    AV_PKT_DATA_PRFT,
-
-    /**
-     * ICC profile data consisting of an opaque octet buffer following the
-     * format described by ISO 15076-1.
-     */
-    AV_PKT_DATA_ICC_PROFILE,
-
-    /**
-     * The number of side data types.
-     * This is not part of the public API/ABI in the sense that it may
-     * change when new side data types are added.
-     * This must stay the last enum value.
-     * If its value becomes huge, some code using it
-     * needs to be updated as it assumes it to be smaller than other limits.
-     */
-    AV_PKT_DATA_NB
-};
-
-#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
-
-typedef struct AVPacketSideData {
-    uint8_t *data;
-    int      size;
-    enum AVPacketSideDataType type;
-} AVPacketSideData;
-
-/**
- * This structure stores compressed data. It is typically exported by demuxers
- * and then passed as input to decoders, or received as output from encoders and
- * then passed to muxers.
- *
- * For video, it should typically contain one compressed frame. For audio it may
- * contain several compressed frames. Encoders are allowed to output empty
- * packets, with no compressed data, containing only side data
- * (e.g. to update some stream parameters at the end of encoding).
- *
- * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
- * ABI. Thus it may be allocated on stack and no new fields can be added to it
- * without libavcodec and libavformat major bump.
- *
- * The semantics of data ownership depends on the buf field.
- * If it is set, the packet data is dynamically allocated and is
- * valid indefinitely until a call to av_packet_unref() reduces the
- * reference count to 0.
- *
- * If the buf field is not set av_packet_ref() would make a copy instead
- * of increasing the reference count.
- *
- * The side data is always allocated with av_malloc(), copied by
- * av_packet_ref() and freed by av_packet_unref().
- *
- * @see av_packet_ref
- * @see av_packet_unref
- */
-typedef struct AVPacket {
-    /**
-     * A reference to the reference-counted buffer where the packet data is
-     * stored.
-     * May be NULL, then the packet data is not reference-counted.
-     */
-    AVBufferRef *buf;
-    /**
-     * Presentation timestamp in AVStream->time_base units; the time at which
-     * the decompressed packet will be presented to the user.
-     * Can be AV_NOPTS_VALUE if it is not stored in the file.
-     * pts MUST be larger or equal to dts as presentation cannot happen before
-     * decompression, unless one wants to view hex dumps. Some formats misuse
-     * the terms dts and pts/cts to mean something different. Such timestamps
-     * must be converted to true pts/dts before they are stored in AVPacket.
-     */
-    int64_t pts;
-    /**
-     * Decompression timestamp in AVStream->time_base units; the time at which
-     * the packet is decompressed.
-     * Can be AV_NOPTS_VALUE if it is not stored in the file.
-     */
-    int64_t dts;
-    uint8_t *data;
-    int   size;
-    int   stream_index;
-    /**
-     * A combination of AV_PKT_FLAG values
-     */
-    int   flags;
-    /**
-     * Additional packet data that can be provided by the container.
-     * Packet can contain several types of side information.
-     */
-    AVPacketSideData *side_data;
-    int side_data_elems;
-
-    /**
-     * Duration of this packet in AVStream->time_base units, 0 if unknown.
-     * Equals next_pts - this_pts in presentation order.
-     */
-    int64_t duration;
-
-    int64_t pos;                            ///< byte position in stream, -1 if unknown
-
-#if FF_API_CONVERGENCE_DURATION
-    /**
-     * @deprecated Same as the duration field, but as int64_t. This was required
-     * for Matroska subtitles, whose duration values could overflow when the
-     * duration field was still an int.
-     */
-    attribute_deprecated
-    int64_t convergence_duration;
-#endif
-} AVPacket;
-#define AV_PKT_FLAG_KEY     0x0001 ///< The packet contains a keyframe
-#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
-/**
- * Flag is used to discard packets which are required to maintain valid
- * decoder state but are not required for output and should be dropped
- * after decoding.
- **/
-#define AV_PKT_FLAG_DISCARD   0x0004
-/**
- * The packet comes from a trusted source.
- *
- * Otherwise-unsafe constructs such as arbitrary pointers to data
- * outside the packet may be followed.
- */
-#define AV_PKT_FLAG_TRUSTED   0x0008
-/**
- * Flag is used to indicate packets that contain frames that can
- * be discarded by the decoder.  I.e. Non-reference frames.
- */
-#define AV_PKT_FLAG_DISPOSABLE 0x0010
-
-
-enum AVSideDataParamChangeFlags {
-    AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT  = 0x0001,
-    AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
-    AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE    = 0x0004,
-    AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS     = 0x0008,
-};
-/**
- * @}
- */
-
 struct AVCodecInternal;
 
 enum AVFieldOrder {
@@ -4418,317 +4043,6 @@  int avcodec_close(AVCodecContext *avctx);
  */
 void avsubtitle_free(AVSubtitle *sub);
 
-/**
- * @}
- */
-
-/**
- * @addtogroup lavc_packet
- * @{
- */
-
-/**
- * Allocate an AVPacket and set its fields to default values.  The resulting
- * struct must be freed using av_packet_free().
- *
- * @return An AVPacket filled with default values or NULL on failure.
- *
- * @note this only allocates the AVPacket itself, not the data buffers. Those
- * must be allocated through other means such as av_new_packet.
- *
- * @see av_new_packet
- */
-AVPacket *av_packet_alloc(void);
-
-/**
- * Create a new packet that references the same data as src.
- *
- * This is a shortcut for av_packet_alloc()+av_packet_ref().
- *
- * @return newly created AVPacket on success, NULL on error.
- *
- * @see av_packet_alloc
- * @see av_packet_ref
- */
-AVPacket *av_packet_clone(const AVPacket *src);
-
-/**
- * Free the packet, if the packet is reference counted, it will be
- * unreferenced first.
- *
- * @param pkt packet to be freed. The pointer will be set to NULL.
- * @note passing NULL is a no-op.
- */
-void av_packet_free(AVPacket **pkt);
-
-/**
- * Initialize optional fields of a packet with default values.
- *
- * Note, this does not touch the data and size members, which have to be
- * initialized separately.
- *
- * @param pkt packet
- */
-void av_init_packet(AVPacket *pkt);
-
-/**
- * Allocate the payload of a packet and initialize its fields with
- * default values.
- *
- * @param pkt packet
- * @param size wanted payload size
- * @return 0 if OK, AVERROR_xxx otherwise
- */
-int av_new_packet(AVPacket *pkt, int size);
-
-/**
- * Reduce packet size, correctly zeroing padding
- *
- * @param pkt packet
- * @param size new size
- */
-void av_shrink_packet(AVPacket *pkt, int size);
-
-/**
- * Increase packet size, correctly zeroing padding
- *
- * @param pkt packet
- * @param grow_by number of bytes by which to increase the size of the packet
- */
-int av_grow_packet(AVPacket *pkt, int grow_by);
-
-/**
- * Initialize a reference-counted packet from av_malloc()ed data.
- *
- * @param pkt packet to be initialized. This function will set the data, size,
- *        and buf fields, all others are left untouched.
- * @param data Data allocated by av_malloc() to be used as packet data. If this
- *        function returns successfully, the data is owned by the underlying AVBuffer.
- *        The caller may not access the data through other means.
- * @param size size of data in bytes, without the padding. I.e. the full buffer
- *        size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
- *
- * @return 0 on success, a negative AVERROR on error
- */
-int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
-
-#if FF_API_AVPACKET_OLD_API
-/**
- * @warning This is a hack - the packet memory allocation stuff is broken. The
- * packet is allocated if it was not really allocated.
- *
- * @deprecated Use av_packet_ref or av_packet_make_refcounted
- */
-attribute_deprecated
-int av_dup_packet(AVPacket *pkt);
-/**
- * Copy packet, including contents
- *
- * @return 0 on success, negative AVERROR on fail
- *
- * @deprecated Use av_packet_ref
- */
-attribute_deprecated
-int av_copy_packet(AVPacket *dst, const AVPacket *src);
-
-/**
- * Copy packet side data
- *
- * @return 0 on success, negative AVERROR on fail
- *
- * @deprecated Use av_packet_copy_props
- */
-attribute_deprecated
-int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src);
-
-/**
- * Free a packet.
- *
- * @deprecated Use av_packet_unref
- *
- * @param pkt packet to free
- */
-attribute_deprecated
-void av_free_packet(AVPacket *pkt);
-#endif
-/**
- * Allocate new information of a packet.
- *
- * @param pkt packet
- * @param type side information type
- * @param size side information size
- * @return pointer to fresh allocated data or NULL otherwise
- */
-uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-                                 int size);
-
-/**
- * Wrap an existing array as a packet side data.
- *
- * @param pkt packet
- * @param type side information type
- * @param data the side data array. It must be allocated with the av_malloc()
- *             family of functions. The ownership of the data is transferred to
- *             pkt.
- * @param size side information size
- * @return a non-negative number on success, a negative AVERROR code on
- *         failure. On failure, the packet is unchanged and the data remains
- *         owned by the caller.
- */
-int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-                            uint8_t *data, size_t size);
-
-/**
- * Shrink the already allocated side data buffer
- *
- * @param pkt packet
- * @param type side information type
- * @param size new side information size
- * @return 0 on success, < 0 on failure
- */
-int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
-                               int size);
-
-/**
- * Get side information from packet.
- *
- * @param pkt packet
- * @param type desired side information type
- * @param size pointer for side information size to store (optional)
- * @return pointer to data if present or NULL otherwise
- */
-uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
-                                 int *size);
-
-#if FF_API_MERGE_SD_API
-attribute_deprecated
-int av_packet_merge_side_data(AVPacket *pkt);
-
-attribute_deprecated
-int av_packet_split_side_data(AVPacket *pkt);
-#endif
-
-const char *av_packet_side_data_name(enum AVPacketSideDataType type);
-
-/**
- * Pack a dictionary for use in side_data.
- *
- * @param dict The dictionary to pack.
- * @param size pointer to store the size of the returned data
- * @return pointer to data if successful, NULL otherwise
- */
-uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size);
-/**
- * Unpack a dictionary from side_data.
- *
- * @param data data from side_data
- * @param size size of the data
- * @param dict the metadata storage dictionary
- * @return 0 on success, < 0 on failure
- */
-int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict);
-
-
-/**
- * Convenience function to free all the side data stored.
- * All the other fields stay untouched.
- *
- * @param pkt packet
- */
-void av_packet_free_side_data(AVPacket *pkt);
-
-/**
- * Setup a new reference to the data described by a given packet
- *
- * If src is reference-counted, setup dst as a new reference to the
- * buffer in src. Otherwise allocate a new buffer in dst and copy the
- * data from src into it.
- *
- * All the other fields are copied from src.
- *
- * @see av_packet_unref
- *
- * @param dst Destination packet. Will be completely overwritten.
- * @param src Source packet
- *
- * @return 0 on success, a negative AVERROR on error. On error, dst
- *         will be blank (as if returned by av_packet_alloc()).
- */
-int av_packet_ref(AVPacket *dst, const AVPacket *src);
-
-/**
- * Wipe the packet.
- *
- * Unreference the buffer referenced by the packet and reset the
- * remaining packet fields to their default values.
- *
- * @param pkt The packet to be unreferenced.
- */
-void av_packet_unref(AVPacket *pkt);
-
-/**
- * Move every field in src to dst and reset src.
- *
- * @see av_packet_unref
- *
- * @param src Source packet, will be reset
- * @param dst Destination packet
- */
-void av_packet_move_ref(AVPacket *dst, AVPacket *src);
-
-/**
- * Copy only "properties" fields from src to dst.
- *
- * Properties for the purpose of this function are all the fields
- * beside those related to the packet data (buf, data, size)
- *
- * @param dst Destination packet
- * @param src Source packet
- *
- * @return 0 on success AVERROR on failure.
- */
-int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
-
-/**
- * Ensure the data described by a given packet is reference counted.
- *
- * @note This function does not ensure that the reference will be writable.
- *       Use av_packet_make_writable instead for that purpose.
- *
- * @see av_packet_ref
- * @see av_packet_make_writable
- *
- * @param pkt packet whose data should be made reference counted.
- *
- * @return 0 on success, a negative AVERROR on error. On failure, the
- *         packet is unchanged.
- */
-int av_packet_make_refcounted(AVPacket *pkt);
-
-/**
- * Create a writable reference for the data described by a given packet,
- * avoiding data copy if possible.
- *
- * @param pkt Packet whose data should be made writable.
- *
- * @return 0 on success, a negative AVERROR on failure. On failure, the
- *         packet is unchanged.
- */
-int av_packet_make_writable(AVPacket *pkt);
-
-/**
- * Convert valid timing fields (timestamps / durations) in a packet from one
- * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
- * ignored.
- *
- * @param pkt packet on which the conversion will be performed
- * @param tb_src source timebase, in which the timing fields in pkt are
- *               expressed
- * @param tb_dst destination timebase, to which the timing fields will be
- *               converted
- */
-void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst);
-
 /**
  * @}
  */
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c
index c622718a45..ad020eef13 100644
--- a/libavcodec/avpacket.c
+++ b/libavcodec/avpacket.c
@@ -26,9 +26,10 @@ 
 #include "libavutil/internal.h"
 #include "libavutil/mathematics.h"
 #include "libavutil/mem.h"
-#include "avcodec.h"
+
 #include "bytestream.h"
 #include "internal.h"
+#include "packet.h"
 
 void av_init_packet(AVPacket *pkt)
 {
diff --git a/libavcodec/packet.h b/libavcodec/packet.h
new file mode 100644
index 0000000000..e53abe6fd0
--- /dev/null
+++ b/libavcodec/packet.h
@@ -0,0 +1,713 @@ 
+/*
+ * AVPacket public API
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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 FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef AVCODEC_PACKET_H
+#define AVCODEC_PACKET_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "libavutil/attributes.h"
+#include "libavutil/buffer.h"
+#include "libavutil/dict.h"
+#include "libavutil/rational.h"
+
+#include "libavcodec/version.h"
+
+/**
+ * @defgroup lavc_packet AVPacket
+ *
+ * Types and functions for working with AVPacket.
+ * @{
+ */
+enum AVPacketSideDataType {
+    /**
+     * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE
+     * bytes worth of palette. This side data signals that a new palette is
+     * present.
+     */
+    AV_PKT_DATA_PALETTE,
+
+    /**
+     * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format
+     * that the extradata buffer was changed and the receiving side should
+     * act upon it appropriately. The new extradata is embedded in the side
+     * data buffer and should be immediately used for processing the current
+     * frame or packet.
+     */
+    AV_PKT_DATA_NEW_EXTRADATA,
+
+    /**
+     * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
+     * @code
+     * u32le param_flags
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
+     *     s32le channel_count
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
+     *     u64le channel_layout
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
+     *     s32le sample_rate
+     * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
+     *     s32le width
+     *     s32le height
+     * @endcode
+     */
+    AV_PKT_DATA_PARAM_CHANGE,
+
+    /**
+     * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
+     * structures with info about macroblocks relevant to splitting the
+     * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
+     * That is, it does not necessarily contain info about all macroblocks,
+     * as long as the distance between macroblocks in the info is smaller
+     * than the target payload size.
+     * Each MB info structure is 12 bytes, and is laid out as follows:
+     * @code
+     * u32le bit offset from the start of the packet
+     * u8    current quantizer at the start of the macroblock
+     * u8    GOB number
+     * u16le macroblock address within the GOB
+     * u8    horizontal MV predictor
+     * u8    vertical MV predictor
+     * u8    horizontal MV predictor for block number 3
+     * u8    vertical MV predictor for block number 3
+     * @endcode
+     */
+    AV_PKT_DATA_H263_MB_INFO,
+
+    /**
+     * This side data should be associated with an audio stream and contains
+     * ReplayGain information in form of the AVReplayGain struct.
+     */
+    AV_PKT_DATA_REPLAYGAIN,
+
+    /**
+     * This side data contains a 3x3 transformation matrix describing an affine
+     * transformation that needs to be applied to the decoded video frames for
+     * correct presentation.
+     *
+     * See libavutil/display.h for a detailed description of the data.
+     */
+    AV_PKT_DATA_DISPLAYMATRIX,
+
+    /**
+     * This side data should be associated with a video stream and contains
+     * Stereoscopic 3D information in form of the AVStereo3D struct.
+     */
+    AV_PKT_DATA_STEREO3D,
+
+    /**
+     * This side data should be associated with an audio stream and corresponds
+     * to enum AVAudioServiceType.
+     */
+    AV_PKT_DATA_AUDIO_SERVICE_TYPE,
+
+    /**
+     * This side data contains quality related information from the encoder.
+     * @code
+     * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
+     * u8    picture type
+     * u8    error count
+     * u16   reserved
+     * u64le[error count] sum of squared differences between encoder in and output
+     * @endcode
+     */
+    AV_PKT_DATA_QUALITY_STATS,
+
+    /**
+     * This side data contains an integer value representing the stream index
+     * of a "fallback" track.  A fallback track indicates an alternate
+     * track to use when the current track can not be decoded for some reason.
+     * e.g. no decoder available for codec.
+     */
+    AV_PKT_DATA_FALLBACK_TRACK,
+
+    /**
+     * This side data corresponds to the AVCPBProperties struct.
+     */
+    AV_PKT_DATA_CPB_PROPERTIES,
+
+    /**
+     * Recommmends skipping the specified number of 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_PKT_DATA_SKIP_SAMPLES,
+
+    /**
+     * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
+     * the packet may contain "dual mono" audio specific to Japanese DTV
+     * and if it is true, recommends only the selected channel to be used.
+     * @code
+     * u8    selected channels (0=mail/left, 1=sub/right, 2=both)
+     * @endcode
+     */
+    AV_PKT_DATA_JP_DUALMONO,
+
+    /**
+     * A list of zero terminated key/value strings. There is no end marker for
+     * the list, so it is required to rely on the side data size to stop.
+     */
+    AV_PKT_DATA_STRINGS_METADATA,
+
+    /**
+     * Subtitle event position
+     * @code
+     * u32le x1
+     * u32le y1
+     * u32le x2
+     * u32le y2
+     * @endcode
+     */
+    AV_PKT_DATA_SUBTITLE_POSITION,
+
+    /**
+     * Data found in BlockAdditional element of matroska container. There is
+     * no end marker for the data, so it is required to rely on the side data
+     * size to recognize the end. 8 byte id (as found in BlockAddId) followed
+     * by data.
+     */
+    AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
+
+    /**
+     * The optional first identifier line of a WebVTT cue.
+     */
+    AV_PKT_DATA_WEBVTT_IDENTIFIER,
+
+    /**
+     * The optional settings (rendering instructions) that immediately
+     * follow the timestamp specifier of a WebVTT cue.
+     */
+    AV_PKT_DATA_WEBVTT_SETTINGS,
+
+    /**
+     * A list of zero terminated key/value strings. There is no end marker for
+     * the list, so it is required to rely on the side data size to stop. This
+     * side data includes updated metadata which appeared in the stream.
+     */
+    AV_PKT_DATA_METADATA_UPDATE,
+
+    /**
+     * MPEGTS stream ID as uint8_t, this is required to pass the stream ID
+     * information from the demuxer to the corresponding muxer.
+     */
+    AV_PKT_DATA_MPEGTS_STREAM_ID,
+
+    /**
+     * Mastering display metadata (based on SMPTE-2086:2014). This metadata
+     * should be associated with a video stream and contains data in the form
+     * of the AVMasteringDisplayMetadata struct.
+     */
+    AV_PKT_DATA_MASTERING_DISPLAY_METADATA,
+
+    /**
+     * This side data should be associated with a video stream and corresponds
+     * to the AVSphericalMapping structure.
+     */
+    AV_PKT_DATA_SPHERICAL,
+
+    /**
+     * Content light level (based on CTA-861.3). This metadata should be
+     * associated with a video stream and contains data in the form of the
+     * AVContentLightMetadata struct.
+     */
+    AV_PKT_DATA_CONTENT_LIGHT_LEVEL,
+
+    /**
+     * ATSC A53 Part 4 Closed Captions. This metadata should be associated with
+     * a video stream. A53 CC bitstream is stored as uint8_t in AVPacketSideData.data.
+     * The number of bytes of CC data is AVPacketSideData.size.
+     */
+    AV_PKT_DATA_A53_CC,
+
+    /**
+     * This side data is encryption initialization data.
+     * The format is not part of ABI, use av_encryption_init_info_* methods to
+     * access.
+     */
+    AV_PKT_DATA_ENCRYPTION_INIT_INFO,
+
+    /**
+     * This side data contains encryption info for how to decrypt the packet.
+     * The format is not part of ABI, use av_encryption_info_* methods to access.
+     */
+    AV_PKT_DATA_ENCRYPTION_INFO,
+
+    /**
+     * Active Format Description data consisting of a single byte as specified
+     * in ETSI TS 101 154 using AVActiveFormatDescription enum.
+     */
+    AV_PKT_DATA_AFD,
+
+    /**
+     * Producer Reference Time data corresponding to the AVProducerReferenceTime struct,
+     * usually exported by some encoders (on demand through the prft flag set in the
+     * AVCodecContext export_side_data field).
+     */
+    AV_PKT_DATA_PRFT,
+
+    /**
+     * ICC profile data consisting of an opaque octet buffer following the
+     * format described by ISO 15076-1.
+     */
+    AV_PKT_DATA_ICC_PROFILE,
+
+    /**
+     * The number of side data types.
+     * This is not part of the public API/ABI in the sense that it may
+     * change when new side data types are added.
+     * This must stay the last enum value.
+     * If its value becomes huge, some code using it
+     * needs to be updated as it assumes it to be smaller than other limits.
+     */
+    AV_PKT_DATA_NB
+};
+
+#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
+
+typedef struct AVPacketSideData {
+    uint8_t *data;
+    int      size;
+    enum AVPacketSideDataType type;
+} AVPacketSideData;
+
+/**
+ * This structure stores compressed data. It is typically exported by demuxers
+ * and then passed as input to decoders, or received as output from encoders and
+ * then passed to muxers.
+ *
+ * For video, it should typically contain one compressed frame. For audio it may
+ * contain several compressed frames. Encoders are allowed to output empty
+ * packets, with no compressed data, containing only side data
+ * (e.g. to update some stream parameters at the end of encoding).
+ *
+ * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
+ * ABI. Thus it may be allocated on stack and no new fields can be added to it
+ * without libavcodec and libavformat major bump.
+ *
+ * The semantics of data ownership depends on the buf field.
+ * If it is set, the packet data is dynamically allocated and is
+ * valid indefinitely until a call to av_packet_unref() reduces the
+ * reference count to 0.
+ *
+ * If the buf field is not set av_packet_ref() would make a copy instead
+ * of increasing the reference count.
+ *
+ * The side data is always allocated with av_malloc(), copied by
+ * av_packet_ref() and freed by av_packet_unref().
+ *
+ * @see av_packet_ref
+ * @see av_packet_unref
+ */
+typedef struct AVPacket {
+    /**
+     * A reference to the reference-counted buffer where the packet data is
+     * stored.
+     * May be NULL, then the packet data is not reference-counted.
+     */
+    AVBufferRef *buf;
+    /**
+     * Presentation timestamp in AVStream->time_base units; the time at which
+     * the decompressed packet will be presented to the user.
+     * Can be AV_NOPTS_VALUE if it is not stored in the file.
+     * pts MUST be larger or equal to dts as presentation cannot happen before
+     * decompression, unless one wants to view hex dumps. Some formats misuse
+     * the terms dts and pts/cts to mean something different. Such timestamps
+     * must be converted to true pts/dts before they are stored in AVPacket.
+     */
+    int64_t pts;
+    /**
+     * Decompression timestamp in AVStream->time_base units; the time at which
+     * the packet is decompressed.
+     * Can be AV_NOPTS_VALUE if it is not stored in the file.
+     */
+    int64_t dts;
+    uint8_t *data;
+    int   size;
+    int   stream_index;
+    /**
+     * A combination of AV_PKT_FLAG values
+     */
+    int   flags;
+    /**
+     * Additional packet data that can be provided by the container.
+     * Packet can contain several types of side information.
+     */
+    AVPacketSideData *side_data;
+    int side_data_elems;
+
+    /**
+     * Duration of this packet in AVStream->time_base units, 0 if unknown.
+     * Equals next_pts - this_pts in presentation order.
+     */
+    int64_t duration;
+
+    int64_t pos;                            ///< byte position in stream, -1 if unknown
+
+#if FF_API_CONVERGENCE_DURATION
+    /**
+     * @deprecated Same as the duration field, but as int64_t. This was required
+     * for Matroska subtitles, whose duration values could overflow when the
+     * duration field was still an int.
+     */
+    attribute_deprecated
+    int64_t convergence_duration;
+#endif
+} AVPacket;
+
+#define AV_PKT_FLAG_KEY     0x0001 ///< The packet contains a keyframe
+#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
+/**
+ * Flag is used to discard packets which are required to maintain valid
+ * decoder state but are not required for output and should be dropped
+ * after decoding.
+ **/
+#define AV_PKT_FLAG_DISCARD   0x0004
+/**
+ * The packet comes from a trusted source.
+ *
+ * Otherwise-unsafe constructs such as arbitrary pointers to data
+ * outside the packet may be followed.
+ */
+#define AV_PKT_FLAG_TRUSTED   0x0008
+/**
+ * Flag is used to indicate packets that contain frames that can
+ * be discarded by the decoder.  I.e. Non-reference frames.
+ */
+#define AV_PKT_FLAG_DISPOSABLE 0x0010
+
+enum AVSideDataParamChangeFlags {
+    AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT  = 0x0001,
+    AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT = 0x0002,
+    AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE    = 0x0004,
+    AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS     = 0x0008,
+};
+
+/**
+ * Allocate an AVPacket and set its fields to default values.  The resulting
+ * struct must be freed using av_packet_free().
+ *
+ * @return An AVPacket filled with default values or NULL on failure.
+ *
+ * @note this only allocates the AVPacket itself, not the data buffers. Those
+ * must be allocated through other means such as av_new_packet.
+ *
+ * @see av_new_packet
+ */
+AVPacket *av_packet_alloc(void);
+
+/**
+ * Create a new packet that references the same data as src.
+ *
+ * This is a shortcut for av_packet_alloc()+av_packet_ref().
+ *
+ * @return newly created AVPacket on success, NULL on error.
+ *
+ * @see av_packet_alloc
+ * @see av_packet_ref
+ */
+AVPacket *av_packet_clone(const AVPacket *src);
+
+/**
+ * Free the packet, if the packet is reference counted, it will be
+ * unreferenced first.
+ *
+ * @param pkt packet to be freed. The pointer will be set to NULL.
+ * @note passing NULL is a no-op.
+ */
+void av_packet_free(AVPacket **pkt);
+
+/**
+ * Initialize optional fields of a packet with default values.
+ *
+ * Note, this does not touch the data and size members, which have to be
+ * initialized separately.
+ *
+ * @param pkt packet
+ */
+void av_init_packet(AVPacket *pkt);
+
+/**
+ * Allocate the payload of a packet and initialize its fields with
+ * default values.
+ *
+ * @param pkt packet
+ * @param size wanted payload size
+ * @return 0 if OK, AVERROR_xxx otherwise
+ */
+int av_new_packet(AVPacket *pkt, int size);
+
+/**
+ * Reduce packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param size new size
+ */
+void av_shrink_packet(AVPacket *pkt, int size);
+
+/**
+ * Increase packet size, correctly zeroing padding
+ *
+ * @param pkt packet
+ * @param grow_by number of bytes by which to increase the size of the packet
+ */
+int av_grow_packet(AVPacket *pkt, int grow_by);
+
+/**
+ * Initialize a reference-counted packet from av_malloc()ed data.
+ *
+ * @param pkt packet to be initialized. This function will set the data, size,
+ *        and buf fields, all others are left untouched.
+ * @param data Data allocated by av_malloc() to be used as packet data. If this
+ *        function returns successfully, the data is owned by the underlying AVBuffer.
+ *        The caller may not access the data through other means.
+ * @param size size of data in bytes, without the padding. I.e. the full buffer
+ *        size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
+ *
+ * @return 0 on success, a negative AVERROR on error
+ */
+int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
+
+#if FF_API_AVPACKET_OLD_API
+/**
+ * @warning This is a hack - the packet memory allocation stuff is broken. The
+ * packet is allocated if it was not really allocated.
+ *
+ * @deprecated Use av_packet_ref or av_packet_make_refcounted
+ */
+attribute_deprecated
+int av_dup_packet(AVPacket *pkt);
+/**
+ * Copy packet, including contents
+ *
+ * @return 0 on success, negative AVERROR on fail
+ *
+ * @deprecated Use av_packet_ref
+ */
+attribute_deprecated
+int av_copy_packet(AVPacket *dst, const AVPacket *src);
+
+/**
+ * Copy packet side data
+ *
+ * @return 0 on success, negative AVERROR on fail
+ *
+ * @deprecated Use av_packet_copy_props
+ */
+attribute_deprecated
+int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src);
+
+/**
+ * Free a packet.
+ *
+ * @deprecated Use av_packet_unref
+ *
+ * @param pkt packet to free
+ */
+attribute_deprecated
+void av_free_packet(AVPacket *pkt);
+#endif
+/**
+ * Allocate new information of a packet.
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param size side information size
+ * @return pointer to fresh allocated data or NULL otherwise
+ */
+uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                                 int size);
+
+/**
+ * Wrap an existing array as a packet side data.
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param data the side data array. It must be allocated with the av_malloc()
+ *             family of functions. The ownership of the data is transferred to
+ *             pkt.
+ * @param size side information size
+ * @return a non-negative number on success, a negative AVERROR code on
+ *         failure. On failure, the packet is unchanged and the data remains
+ *         owned by the caller.
+ */
+int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                            uint8_t *data, size_t size);
+
+/**
+ * Shrink the already allocated side data buffer
+ *
+ * @param pkt packet
+ * @param type side information type
+ * @param size new side information size
+ * @return 0 on success, < 0 on failure
+ */
+int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type,
+                               int size);
+
+/**
+ * Get side information from packet.
+ *
+ * @param pkt packet
+ * @param type desired side information type
+ * @param size pointer for side information size to store (optional)
+ * @return pointer to data if present or NULL otherwise
+ */
+uint8_t* av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type,
+                                 int *size);
+
+#if FF_API_MERGE_SD_API
+attribute_deprecated
+int av_packet_merge_side_data(AVPacket *pkt);
+
+attribute_deprecated
+int av_packet_split_side_data(AVPacket *pkt);
+#endif
+
+const char *av_packet_side_data_name(enum AVPacketSideDataType type);
+
+/**
+ * Pack a dictionary for use in side_data.
+ *
+ * @param dict The dictionary to pack.
+ * @param size pointer to store the size of the returned data
+ * @return pointer to data if successful, NULL otherwise
+ */
+uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size);
+/**
+ * Unpack a dictionary from side_data.
+ *
+ * @param data data from side_data
+ * @param size size of the data
+ * @param dict the metadata storage dictionary
+ * @return 0 on success, < 0 on failure
+ */
+int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict);
+
+
+/**
+ * Convenience function to free all the side data stored.
+ * All the other fields stay untouched.
+ *
+ * @param pkt packet
+ */
+void av_packet_free_side_data(AVPacket *pkt);
+
+/**
+ * Setup a new reference to the data described by a given packet
+ *
+ * If src is reference-counted, setup dst as a new reference to the
+ * buffer in src. Otherwise allocate a new buffer in dst and copy the
+ * data from src into it.
+ *
+ * All the other fields are copied from src.
+ *
+ * @see av_packet_unref
+ *
+ * @param dst Destination packet. Will be completely overwritten.
+ * @param src Source packet
+ *
+ * @return 0 on success, a negative AVERROR on error. On error, dst
+ *         will be blank (as if returned by av_packet_alloc()).
+ */
+int av_packet_ref(AVPacket *dst, const AVPacket *src);
+
+/**
+ * Wipe the packet.
+ *
+ * Unreference the buffer referenced by the packet and reset the
+ * remaining packet fields to their default values.
+ *
+ * @param pkt The packet to be unreferenced.
+ */
+void av_packet_unref(AVPacket *pkt);
+
+/**
+ * Move every field in src to dst and reset src.
+ *
+ * @see av_packet_unref
+ *
+ * @param src Source packet, will be reset
+ * @param dst Destination packet
+ */
+void av_packet_move_ref(AVPacket *dst, AVPacket *src);
+
+/**
+ * Copy only "properties" fields from src to dst.
+ *
+ * Properties for the purpose of this function are all the fields
+ * beside those related to the packet data (buf, data, size)
+ *
+ * @param dst Destination packet
+ * @param src Source packet
+ *
+ * @return 0 on success AVERROR on failure.
+ */
+int av_packet_copy_props(AVPacket *dst, const AVPacket *src);
+
+/**
+ * Ensure the data described by a given packet is reference counted.
+ *
+ * @note This function does not ensure that the reference will be writable.
+ *       Use av_packet_make_writable instead for that purpose.
+ *
+ * @see av_packet_ref
+ * @see av_packet_make_writable
+ *
+ * @param pkt packet whose data should be made reference counted.
+ *
+ * @return 0 on success, a negative AVERROR on error. On failure, the
+ *         packet is unchanged.
+ */
+int av_packet_make_refcounted(AVPacket *pkt);
+
+/**
+ * Create a writable reference for the data described by a given packet,
+ * avoiding data copy if possible.
+ *
+ * @param pkt Packet whose data should be made writable.
+ *
+ * @return 0 on success, a negative AVERROR on failure. On failure, the
+ *         packet is unchanged.
+ */
+int av_packet_make_writable(AVPacket *pkt);
+
+/**
+ * Convert valid timing fields (timestamps / durations) in a packet from one
+ * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
+ * ignored.
+ *
+ * @param pkt packet on which the conversion will be performed
+ * @param tb_src source timebase, in which the timing fields in pkt are
+ *               expressed
+ * @param tb_dst destination timebase, to which the timing fields will be
+ *               converted
+ */
+void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst);
+
+/**
+ * @}
+ */
+
+#endif // AVCODEC_PACKET_H
diff --git a/libavcodec/version.h b/libavcodec/version.h
index f4d1d4de21..e62d1a7925 100644
--- a/libavcodec/version.h
+++ b/libavcodec/version.h
@@ -28,8 +28,8 @@ 
 #include "libavutil/version.h"
 
 #define LIBAVCODEC_VERSION_MAJOR  58
-#define LIBAVCODEC_VERSION_MINOR  77
-#define LIBAVCODEC_VERSION_MICRO 101
+#define LIBAVCODEC_VERSION_MINOR  78
+#define LIBAVCODEC_VERSION_MICRO 100
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \