libavcodec/libxvidff.c File Reference

#include <xvid.h>
#include <unistd.h>
#include "avcodec.h"
#include "libxvid_internal.h"

Go to the source code of this file.

Data Structures

struct  xvid_context
 Structure for the private XviD context. More...
struct  xvid_ff_pass1
 Structure for the private first-pass plugin. More...

Defines

#define BUFFER_SIZE   1024
 Buffer management macros.
#define BUFFER_REMAINING(x)   (BUFFER_SIZE - strlen(x))
#define BUFFER_CAT(x)   (&((x)[strlen(x)]))

Typedefs

typedef struct xvid_context xvid_context_t
 Structure for the private XviD context.
typedef struct xvid_ff_pass1 xvid_ff_pass1_t
 Structure for the private first-pass plugin.

Functions

int xvid_strip_vol_header (AVCodecContext *avctx, unsigned char *frame, unsigned int header_len, unsigned int frame_len)
 Routine to create a global VO/VOL header for MP4 container.
int xvid_ff_2pass (void *ref, int cmd, void *p1, void *p2)
 Dispatch function for our custom plugin.
void xvid_correct_framerate (AVCodecContext *avctx)
 Routine to correct a possibly erroneous framerate being fed to us.
int ff_xvid_encode_init (AVCodecContext *avctx)
 Creates the private context for the encoder.
int ff_xvid_encode_frame (AVCodecContext *avctx, unsigned char *frame, int buf_size, void *data)
 Encodes a single frame.
int ff_xvid_encode_close (AVCodecContext *avctx)
 Destroys the private context for the encoder.
static int xvid_ff_2pass_create (xvid_plg_create_t *param, void **handle)
 Initializes the two-pass plugin and context.
static int xvid_ff_2pass_destroy (xvid_context_t *ref, xvid_plg_destroy_t *param)
 Destroys the two-pass plugin context.
static int xvid_ff_2pass_before (xvid_context_t *ref, xvid_plg_data_t *param)
 Enables fast encode mode during the first pass.
static int xvid_ff_2pass_after (xvid_context_t *ref, xvid_plg_data_t *param)
 Captures statistic data and writes it during first pass.

Variables

AVCodec libxvid_encoder
 XviD codec definition for libavcodec.


Define Documentation

#define BUFFER_CAT (  )     (&((x)[strlen(x)]))

Definition at line 38 of file libxvidff.c.

Referenced by xvid_ff_2pass_after(), and xvid_ff_2pass_create().

#define BUFFER_REMAINING (  )     (BUFFER_SIZE - strlen(x))

Definition at line 37 of file libxvidff.c.

Referenced by xvid_ff_2pass_after(), and xvid_ff_2pass_create().

#define BUFFER_SIZE   1024

Buffer management macros.

Definition at line 36 of file libxvidff.c.


Typedef Documentation

typedef struct xvid_context xvid_context_t

Structure for the private XviD context.

This stores all the private context for the codec.

Structure for the private first-pass plugin.


Function Documentation

int ff_xvid_encode_close ( AVCodecContext avctx  ) 

Destroys the private context for the encoder.

All buffers are freed, and the XviD encoder context is destroyed.

Parameters:
avctx AVCodecContext pointer to context
Returns:
Returns 0, success guaranteed

Definition at line 466 of file libxvidff.c.

int ff_xvid_encode_frame ( AVCodecContext avctx,
unsigned char *  frame,
int  buf_size,
void *  data 
)

Encodes a single frame.

Parameters:
avctx AVCodecContext pointer to context
frame Pointer to encoded frame buffer
buf_size Size of encoded frame buffer
data Pointer to AVFrame of unencoded frame
Returns:
Returns 0 on success, -1 on failure

Definition at line 369 of file libxvidff.c.

int ff_xvid_encode_init ( AVCodecContext avctx  ) 

Creates the private context for the encoder.

All buffers are allocated, settings are loaded from the user, and the encoder context created.

Parameters:
avctx AVCodecContext pointer to context
Returns:
Returns 0 on success, -1 on failure

Definition at line 86 of file libxvidff.c.

void xvid_correct_framerate ( AVCodecContext avctx  ) 

Routine to correct a possibly erroneous framerate being fed to us.

XviD currently chokes on framerates where the ticks per frame is extremely large. This function works to correct problems in this area by estimating a new framerate and taking the simpler fraction of the two presented.

Parameters:
avctx Context that contains the framerate to correct.

Definition at line 540 of file libxvidff.c.

Referenced by ff_xvid_encode_init().

int xvid_ff_2pass ( void *  ref,
int  cmd,
void *  p1,
void *  p2 
)

Dispatch function for our custom plugin.

This handles the dispatch for the XviD plugin. It passes data on to other functions for actual processing.

Parameters:
ref Context pointer for the plugin
cmd The task given for us to complete
p1 First parameter (varies)
p2 Second parameter (varies)
Returns:
Returns XVID_ERR_xxxx on failure, or 0 on success

Definition at line 732 of file libxvidff.c.

Referenced by ff_xvid_encode_init().

static int xvid_ff_2pass_after ( xvid_context_t ref,
xvid_plg_data_t *  param 
) [static]

Captures statistic data and writes it during first pass.

Parameters:
ref Context pointer for the plugin
param Statistic data
Returns:
Returns XVID_ERR_xxxx on failure, or 0 on success

Definition at line 696 of file libxvidff.c.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_before ( xvid_context_t ref,
xvid_plg_data_t *  param 
) [static]

Enables fast encode mode during the first pass.

Parameters:
ref Context pointer for the plugin
param Frame data
Returns:
Returns 0, success guaranteed

Definition at line 653 of file libxvidff.c.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_create ( xvid_plg_create_t *  param,
void **  handle 
) [static]

Initializes the two-pass plugin and context.

Parameters:
param Input construction parameter structure
handle Private context handle
Returns:
Returns XVID_ERR_xxxx on failure, or 0 on success.

Definition at line 606 of file libxvidff.c.

Referenced by xvid_ff_2pass().

static int xvid_ff_2pass_destroy ( xvid_context_t ref,
xvid_plg_destroy_t *  param 
) [static]

Destroys the two-pass plugin context.

Parameters:
ref Context pointer for the plugin
param Destrooy context
Returns:
Returns 0, success guaranteed

Definition at line 637 of file libxvidff.c.

Referenced by xvid_ff_2pass().

int xvid_strip_vol_header ( AVCodecContext avctx,
unsigned char *  frame,
unsigned int  header_len,
unsigned int  frame_len 
)

Routine to create a global VO/VOL header for MP4 container.

What we do here is extract the header from the XviD bitstream as it is encoded. We also strip the repeated headers from the bitstream when a global header is requested for MPEG-4 ISO compliance.

Parameters:
avctx AVCodecContext pointer to context
frame Pointer to encoded frame data
header_len Length of header to search
frame_len Length of encoded frame data
Returns:
Returns new length of frame data

Definition at line 500 of file libxvidff.c.

Referenced by ff_xvid_encode_frame().


Variable Documentation

Initial value:

XviD codec definition for libavcodec.

Definition at line 758 of file libxvidff.c.


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