avpacket.c File Reference

#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "avcodec.h"

Go to the source code of this file.

Macros
#define	ALLOC_MALLOC(data, size)   data = av_malloc(size)
#define	ALLOC_BUF(data, size)
#define	DUP_DATA(dst, src, size, padding, ALLOC)

Functions
void	av_destruct_packet (AVPacket *pkt)
	Default packet destructor. More...
static void	dummy_destruct_packet (AVPacket *pkt)
void	av_init_packet (AVPacket *pkt)
	Initialize optional fields of a packet with default values. More...
static int	packet_alloc (AVBufferRef **buf, int size)
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...
int	av_dup_packet (AVPacket *pkt)
void	av_packet_free_side_data (AVPacket *pkt)
	Convenience function to free all the side data stored. More...
void	av_free_packet (AVPacket *pkt)
	Free a packet. More...
uint8_t *	av_packet_new_side_data (AVPacket *pkt, enum AVPacketSideDataType type, int size)
	Allocate new information of a packet. More...
uint8_t *	av_packet_get_side_data (AVPacket *pkt, enum AVPacketSideDataType type, int *size)
	Get side information from packet. More...
int	av_packet_shrink_side_data (AVPacket *pkt, enum AVPacketSideDataType type, int size)
	Shrink the already allocated side data buffer. More...
int	av_packet_copy_props (AVPacket *dst, const AVPacket *src)
	Copy only "properties" fields from src to dst. More...
void	av_packet_unref (AVPacket *pkt)
	Wipe the packet. More...
int	av_packet_ref (AVPacket *dst, AVPacket *src)
	Setup a new reference to the data described by a given packet. More...
void	av_packet_move_ref (AVPacket *dst, AVPacket *src)
	Move every field in src to dst and reset src. More...
void	av_packet_rescale_ts (AVPacket *pkt, AVRational src_tb, AVRational dst_tb)
	Convert valid timing fields (timestamps / durations) in a packet from one timebase to another. More...

Macro Definition Documentation

#define ALLOC_MALLOC	(		data,
			size
	)		data = av_malloc(size)

Definition at line 163 of file avpacket.c.

Referenced by av_dup_packet().

#define ALLOC_BUF	(		data,
			size
	)

Value:

do {                                         \
    av_buffer_realloc(&pkt->buf, size);      \
    data = pkt->buf ? pkt->buf->data : NULL; \
} while (0)

Definition at line 164 of file avpacket.c.

Referenced by av_dup_packet().

#define DUP_DATA	(		dst,
			src,
			size,
			padding,
			ALLOC
	)

Value:

do {                                                                \
        void *data;                                                     \
        if (padding) {                                                  \
            if ((unsigned)(size) >                                      \
                (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE)        \
                goto failed_alloc;                                      \
            ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE);           \
        } else {                                                        \
            ALLOC(data, size);                                          \
        }                                                               \
        if (!data)                                                      \
            goto failed_alloc;                                          \
        memcpy(data, src, size);                                        \
        if (padding)                                                    \
            memset((uint8_t *)data + size, 0,                           \
                   FF_INPUT_BUFFER_PADDING_SIZE);                       \
        dst = data;                                                     \
    } while (0)

Definition at line 170 of file avpacket.c.

Referenced by av_dup_packet().

Function Documentation

static void dummy_destruct_packet ( AVPacket *  pkt )

static

Definition at line 41 of file avpacket.c.

Referenced by av_dup_packet(), av_grow_packet(), av_new_packet(), and av_packet_from_data().

static int packet_alloc ( AVBufferRef **  buf, int  size  )

static

Definition at line 66 of file avpacket.c.

Referenced by av_new_packet(), and av_packet_ref().