FFmpeg
Data Structures | Macros | Enumerations | Functions
packet.h File Reference
#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"

Go to the source code of this file.

Data Structures

struct  AVPacketSideData
 
struct  AVPacket
 This structure stores compressed data. More...
 

Macros

#define AV_PKT_DATA_QUALITY_FACTOR   AV_PKT_DATA_QUALITY_STATS
 
#define AV_PKT_FLAG_KEY   0x0001
 The packet contains a keyframe. More...
 
#define AV_PKT_FLAG_CORRUPT   0x0002
 The packet content is corrupted. More...
 
#define AV_PKT_FLAG_DISCARD   0x0004
 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. More...
 
#define AV_PKT_FLAG_TRUSTED   0x0008
 The packet comes from a trusted source. More...
 
#define AV_PKT_FLAG_DISPOSABLE   0x0010
 Flag is used to indicate packets that contain frames that can be discarded by the decoder. More...
 

Enumerations

enum  AVPacketSideDataType {
  AV_PKT_DATA_PALETTE, AV_PKT_DATA_NEW_EXTRADATA, AV_PKT_DATA_PARAM_CHANGE, AV_PKT_DATA_H263_MB_INFO,
  AV_PKT_DATA_REPLAYGAIN, AV_PKT_DATA_DISPLAYMATRIX, AV_PKT_DATA_STEREO3D, AV_PKT_DATA_AUDIO_SERVICE_TYPE,
  AV_PKT_DATA_QUALITY_STATS, AV_PKT_DATA_FALLBACK_TRACK, AV_PKT_DATA_CPB_PROPERTIES, AV_PKT_DATA_SKIP_SAMPLES,
  AV_PKT_DATA_JP_DUALMONO, AV_PKT_DATA_STRINGS_METADATA, AV_PKT_DATA_SUBTITLE_POSITION, AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL,
  AV_PKT_DATA_WEBVTT_IDENTIFIER, AV_PKT_DATA_WEBVTT_SETTINGS, AV_PKT_DATA_METADATA_UPDATE, AV_PKT_DATA_MPEGTS_STREAM_ID,
  AV_PKT_DATA_MASTERING_DISPLAY_METADATA, AV_PKT_DATA_SPHERICAL, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, AV_PKT_DATA_A53_CC,
  AV_PKT_DATA_ENCRYPTION_INIT_INFO, AV_PKT_DATA_ENCRYPTION_INFO, AV_PKT_DATA_AFD, AV_PKT_DATA_PRFT,
  AV_PKT_DATA_ICC_PROFILE, AV_PKT_DATA_DOVI_CONF, AV_PKT_DATA_S12M_TIMECODE, AV_PKT_DATA_NB
}
 
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 }
 

Functions

AVPacketav_packet_alloc (void)
 Allocate an AVPacket and set its fields to default values. More...
 
AVPacketav_packet_clone (const AVPacket *src)
 Create a new packet that references the same data as src. More...
 
void av_packet_free (AVPacket **pkt)
 Free the packet, if the packet is reference counted, it will be unreferenced first. More...
 
void av_init_packet (AVPacket *pkt)
 Initialize optional fields of a packet with default values. More...
 
int av_new_packet (AVPacket *pkt, int size)
 Allocate the payload of a packet and initialize its fields with default values. More...
 
void av_shrink_packet (AVPacket *pkt, int size)
 Reduce packet size, correctly zeroing padding. More...
 
int av_grow_packet (AVPacket *pkt, int grow_by)
 Increase packet size, correctly zeroing padding. More...
 
int av_packet_from_data (AVPacket *pkt, uint8_t *data, int size)
 Initialize a reference-counted packet from av_malloc()ed data. More...
 
uint8_tav_packet_new_side_data (AVPacket *pkt, enum AVPacketSideDataType type, int size)
 Allocate new information of a packet. More...
 
int av_packet_add_side_data (AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
 Wrap an existing array as a packet side data. More...
 
int av_packet_shrink_side_data (AVPacket *pkt, enum AVPacketSideDataType type, int size)
 Shrink the already allocated side data buffer. More...
 
uint8_tav_packet_get_side_data (const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
 Get side information from packet. More...
 
const char * av_packet_side_data_name (enum AVPacketSideDataType type)
 
uint8_tav_packet_pack_dictionary (AVDictionary *dict, int *size)
 Pack a dictionary for use in side_data. More...
 
int av_packet_unpack_dictionary (const uint8_t *data, int size, AVDictionary **dict)
 Unpack a dictionary from side_data. More...
 
void av_packet_free_side_data (AVPacket *pkt)
 Convenience function to free all the side data stored. More...
 
int av_packet_ref (AVPacket *dst, const AVPacket *src)
 Setup a new reference to the data described by a given packet. More...
 
void av_packet_unref (AVPacket *pkt)
 Wipe the packet. More...
 
void av_packet_move_ref (AVPacket *dst, AVPacket *src)
 Move every field in src to dst and reset src. More...
 
int av_packet_copy_props (AVPacket *dst, const AVPacket *src)
 Copy only "properties" fields from src to dst. More...
 
int av_packet_make_refcounted (AVPacket *pkt)
 Ensure the data described by a given packet is reference counted. More...
 
int av_packet_make_writable (AVPacket *pkt)
 Create a writable reference for the data described by a given packet, avoiding data copy if possible. More...
 
void av_packet_rescale_ts (AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
 Convert valid timing fields (timestamps / durations) in a packet from one timebase to another. More...