mjpegenc_common.c File Reference

#include <stdint.h>
#include <string.h>
#include "libavutil/common.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "jpegtables.h"
#include "put_bits.h"
#include "mjpegenc.h"
#include "mjpegenc_common.h"
#include "mjpegenc_huffman.h"
#include "mjpeg.h"

Go to the source code of this file.

Functions
av_cold void	ff_init_uni_ac_vlc (const uint8_t huff_size_ac[256], uint8_t *uni_ac_vlc_len)
static int	put_huffman_table (PutBitContext *p, int table_class, int table_id, const uint8_t *bits_table, const uint8_t *value_table)
static void	jpeg_table_header (AVCodecContext *avctx, PutBitContext *p, ScanTable *intra_scantable, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64], int hsample[3])
static void	jpeg_put_comments (AVCodecContext *avctx, PutBitContext *p)
void	ff_mjpeg_init_hvsample (AVCodecContext *avctx, int hsample[4], int vsample[4])
void	ff_mjpeg_encode_picture_header (AVCodecContext *avctx, PutBitContext *pb, ScanTable *intra_scantable, int pred, uint16_t luma_intra_matrix[64], uint16_t chroma_intra_matrix[64])
void	ff_mjpeg_encode_picture_frame (MpegEncContext *s)
	Encodes and outputs the entire frame in the JPEG format. More...
void	ff_mjpeg_escape_FF (PutBitContext *pb, int start)
static void	ff_mjpeg_build_optimal_huffman (MJpegContext *m)
	Builds all 4 optimal Huffman tables. More...
int	ff_mjpeg_encode_stuffing (MpegEncContext *s)
	Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing. More...
void	ff_mjpeg_encode_picture_trailer (PutBitContext *pb, int header_bits)
void	ff_mjpeg_encode_dc (PutBitContext *pb, int val, uint8_t *huff_size, uint16_t *huff_code)

Function Documentation

ff_init_uni_ac_vlc()

av_cold void ff_init_uni_ac_vlc	(	const uint8_t	huff_size_ac[256],
		uint8_t *	uni_ac_vlc_len
	)

Definition at line 39 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_init(), and ff_mjpeg_encode_stuffing().

put_huffman_table()

static int put_huffman_table ( PutBitContext *  p, int  table_class, int  table_id, const uint8_t *  bits_table, const uint8_t *  value_table  )

static

Definition at line 66 of file mjpegenc_common.c.

Referenced by jpeg_table_header().

jpeg_table_header()

static void jpeg_table_header ( AVCodecContext *  avctx, PutBitContext *  p, ScanTable *  intra_scantable, uint16_t  luma_intra_matrix[64], uint16_t  chroma_intra_matrix[64], int  hsample[3]  )

static

Definition at line 86 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_picture_header().

jpeg_put_comments()

static void jpeg_put_comments ( AVCodecContext *  avctx, PutBitContext *  p  )

static

Definition at line 165 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_picture_header().

ff_mjpeg_init_hvsample()

void ff_mjpeg_init_hvsample	(	AVCodecContext *	avctx,
		int	hsample[4],
		int	vsample[4]
	)

Definition at line 221 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_picture_header(), and ljpeg_encode_init().

ff_mjpeg_encode_picture_header()

void ff_mjpeg_encode_picture_header	(	AVCodecContext *	avctx,
		PutBitContext *	pb,
		ScanTable *	intra_scantable,
		int	pred,
		uint16_t	luma_intra_matrix[64],
		uint16_t	chroma_intra_matrix[64]
	)

Definition at line 248 of file mjpegenc_common.c.

Referenced by encode_picture(), ff_mjpeg_encode_stuffing(), and ljpeg_encode_frame().

ff_mjpeg_encode_picture_frame()

void ff_mjpeg_encode_picture_frame

(

MpegEncContext *

s

)

Encodes and outputs the entire frame in the JPEG format.

Parameters

s	The MpegEncContext.

Definition at line 367 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_stuffing().

ff_mjpeg_escape_FF()

void ff_mjpeg_escape_FF	(	PutBitContext *	pb,
		int	start
	)

Definition at line 410 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_stuffing(), and ljpeg_encode_frame().

ff_mjpeg_build_optimal_huffman()

static void ff_mjpeg_build_optimal_huffman ( MJpegContext *  m )

static

Builds all 4 optimal Huffman tables.

Uses the data stored in the JPEG buffer to compute the tables. Stores the Huffman tables in the bits_* and val_* arrays in the MJpegContext.

Parameters

m	MJpegContext containing the JPEG buffer.

Definition at line 477 of file mjpegenc_common.c.

Referenced by ff_mjpeg_encode_stuffing().

ff_mjpeg_encode_stuffing()

int ff_mjpeg_encode_stuffing

(

MpegEncContext *

s

)

Writes the complete JPEG frame when optimal huffman tables are enabled, otherwise writes the stuffing.

Header + values + stuffing.

Parameters

s	The MpegEncContext.

Returns

int Error code, 0 if successful.

Definition at line 539 of file mjpegenc_common.c.

Referenced by write_slice_end().

ff_mjpeg_encode_picture_trailer()

void ff_mjpeg_encode_picture_trailer	(	PutBitContext *	pb,
		int	header_bits
	)

Definition at line 587 of file mjpegenc_common.c.

Referenced by ff_mpv_encode_picture(), and ljpeg_encode_frame().

ff_mjpeg_encode_dc()

void ff_mjpeg_encode_dc	(	PutBitContext *	pb,
		int	val,
		uint8_t *	huff_size,
		uint16_t *	huff_code
	)

Definition at line 594 of file mjpegenc_common.c.

Referenced by encode_block(), ljpeg_encode_bgr(), and ljpeg_encode_yuv_mb().