@@ -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.
@@ -12,6 +12,7 @@ HEADERS = ac3_parser.h \
dxva2.h \
jni.h \
mediacodec.h \
+ packet.h \
qsv.h \
vaapi.h \
vdpau.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);
-
/**
* @}
*/
@@ -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)
{
new file mode 100644
@@ -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
@@ -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, \