libavcodec/mpeg4videoenc.c File Reference

#include "mpegvideo.h"
#include "h263.h"
#include "mpeg4video.h"

Go to the source code of this file.

Defines

#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last)*128*64 + (run)*128 + (level))

Functions

static int get_block_rate (MpegEncContext *s, DCTELEM block[64], int block_last_index, uint8_t scantable[64])

Returns the number of bits that encoding the 8x8 block in block would need.

static void restore_ac_coeffs (MpegEncContext *s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])

Restores the ac coefficients in block that have been changed by decide_ac_pred().

static int decide_ac_pred (MpegEncContext *s, DCTELEM block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])

Returns the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.

void ff_clean_mpeg4_qscales (MpegEncContext *s)

modify mb_type & qscale so that encoding is acually possible in mpeg4

static void mpeg4_encode_dc (PutBitContext *s, int level, int n)

encodes the dc value.

static int mpeg4_get_dc_length (int level, int n)

static void mpeg4_encode_block (MpegEncContext *s, DCTELEM *block, int n, int intra_dc, uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)

encodes a 8x8 block

static int mpeg4_get_block_length (MpegEncContext *s, DCTELEM *block, int n, int intra_dc, uint8_t *scan_table)

static void mpeg4_encode_blocks (MpegEncContext *s, DCTELEM block[6][64], int intra_dc[6], uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)

void mpeg4_encode_mb (MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)

void ff_mpeg4_stuffing (PutBitContext *pbc)

add mpeg4 stuffing bits (01.

void ff_set_mpeg4_time (MpegEncContext *s)

static void mpeg4_encode_gop_header (MpegEncContext *s)

static void mpeg4_encode_visual_object_header (MpegEncContext *s)

static void mpeg4_encode_vol_header (MpegEncContext *s, int vo_number, int vol_number)

void mpeg4_encode_picture_header (MpegEncContext *s, int picture_number)

static void init_uni_dc_tab (void)

static void init_uni_mpeg4_rl_tab (RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab)

static av_cold int encode_init (AVCodecContext *avctx)

void ff_mpeg4_init_partitions (MpegEncContext *s)

void ff_mpeg4_merge_partitions (MpegEncContext *s)

void ff_mpeg4_encode_video_packet_header (MpegEncContext *s)

Variables

static uint8_t uni_DCtab_lum_len [512]

static uint8_t uni_DCtab_chrom_len [512]

static uint16_t uni_DCtab_lum_bits [512]

static uint16_t uni_DCtab_chrom_bits [512]

static uint32_t uni_mpeg4_intra_rl_bits [64 *64 *2 *2]

static uint8_t uni_mpeg4_intra_rl_len [64 *64 *2 *2]

static uint32_t uni_mpeg4_inter_rl_bits [64 *64 *2 *2]

static uint8_t uni_mpeg4_inter_rl_len [64 *64 *2 *2]

static const int dquant_code [5] = {1,0,9,2,3}

AVCodec mpeg4_encoder

Define Documentation

#define UNI_MPEG4_ENC_INDEX	(	last,
		run,
		level	)	((last)12864 + (run)*128 + (level))

Definition at line 43 of file mpeg4videoenc.c.

Function Documentation

static int decide_ac_pred	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		const int	dir[6],
		uint8_t *	st[6],
		int	zigzag_last_index[6]
	)			`[inline, static]`

Returns the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.

This function will also update s->block_last_index and s->ac_val.

Parameters:

`[in,out]`	block	MB coefficients, these will be updated if 1 is returned
`[in]`	dir	ac prediction direction for each 8x8 block
`[out]`	st	scantable for each 8x8 block
`[out]`	zigzag_last_index	index refering to the last non zero coefficient in zigzag order

Definition at line 123 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

static av_cold int encode_init ( AVCodecContext * avctx ) [static]

Definition at line 1241 of file mpeg4videoenc.c.

void ff_clean_mpeg4_qscales ( MpegEncContext * s )

modify mb_type & qscale so that encoding is acually possible in mpeg4

Definition at line 202 of file mpeg4videoenc.c.

Referenced by estimate_qp().

void ff_mpeg4_encode_video_packet_header ( MpegEncContext * s )

Definition at line 1329 of file mpeg4videoenc.c.

Referenced by encode_thread().

void ff_mpeg4_init_partitions ( MpegEncContext * s )

Definition at line 1289 of file mpeg4videoenc.c.

Referenced by encode_thread().

void ff_mpeg4_merge_partitions ( MpegEncContext * s )

Definition at line 1302 of file mpeg4videoenc.c.

Referenced by write_slice_end().

void ff_mpeg4_stuffing ( PutBitContext * pbc )

add mpeg4 stuffing bits (01.

..1)

Definition at line 857 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_gop_header(), mpeg4_encode_visual_object_header(), mpeg4_encode_vol_header(), and write_slice_end().

void ff_set_mpeg4_time ( MpegEncContext * s )

Definition at line 866 of file mpeg4videoenc.c.

Referenced by encode_picture().

static int get_block_rate	(	MpegEncContext *	s,
		DCTELEM	block[64],
		int	block_last_index,
		uint8_t	scantable[64]
	)			`[inline, static]`

Returns the number of bits that encoding the 8x8 block in block would need.

Parameters:

[in] block_last_index last index in scantable order that refers to a non zero element in block.

Definition at line 60 of file mpeg4videoenc.c.

Referenced by decide_ac_pred().

static void init_uni_dc_tab ( void ) [static]

Definition at line 1108 of file mpeg4videoenc.c.

Referenced by encode_init().

static void init_uni_mpeg4_rl_tab	(	RLTable *	rl,
		uint32_t *	bits_tab,
		uint8_t *	len_tab
	)			`[static]`

Definition at line 1160 of file mpeg4videoenc.c.

Referenced by encode_init().

static void mpeg4_encode_block	(	MpegEncContext *	s,
		DCTELEM *	block,
		int	n,
		int	intra_dc,
		uint8_t *	scan_table,
		PutBitContext *	dc_pb,
		PutBitContext *	ac_pb
	)			`[inline, static]`

encodes a 8x8 block

Parameters:

n

block index (0-3 are luma, 4-5 are chroma)

Definition at line 295 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

static void mpeg4_encode_blocks	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		int	intra_dc[6],
		uint8_t **	scan_table,
		PutBitContext *	dc_pb,
		PutBitContext *	ac_pb
	)			`[inline, static]`

Definition at line 462 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

static void mpeg4_encode_dc	(	PutBitContext *	s,
		int	level,
		int	n
	)			`[inline, static]`

encodes the dc value.

Parameters:

n

block index (0-3 are luma, 4-5 are chroma)

Definition at line 242 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_block().

static void mpeg4_encode_gop_header ( MpegEncContext * s ) [static]

Definition at line 875 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_picture_header().

void mpeg4_encode_mb	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		int	motion_x,
		int	motion_y
	)

Definition at line 494 of file mpeg4videoenc.c.

Referenced by encode_mb_internal().

void mpeg4_encode_picture_header	(	MpegEncContext *	s,
		int	picture_number
	)

Definition at line 1052 of file mpeg4videoenc.c.

Referenced by encode_picture().

static void mpeg4_encode_visual_object_header ( MpegEncContext * s ) [static]

Definition at line 905 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_picture_header().

static void mpeg4_encode_vol_header	(	MpegEncContext *	s,
		int	vo_number,
		int	vol_number
	)			`[static]`

Definition at line 950 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_picture_header().

static int mpeg4_get_block_length	(	MpegEncContext *	s,
		DCTELEM *	block,
		int	n,
		int	intra_dc,
		uint8_t *	scan_table
	)			`[static]`

Definition at line 411 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

static int mpeg4_get_dc_length	(	int	level,
		int	n
	)			`[inline, static]`

Definition at line 283 of file mpeg4videoenc.c.

Referenced by mpeg4_get_block_length().

static void restore_ac_coeffs	(	MpegEncContext *	s,
		DCTELEM	block[6][64],
		const int	dir[6],
		uint8_t *	st[6],
		const int	zigzag_last_index[6]
	)			`[inline, static]`

Restores the ac coefficients in block that have been changed by decide_ac_pred().

This function also restores s->block_last_index.

Parameters:

`[in,out]`	block	MB coefficients, these will be restored
`[in]`	dir	ac prediction direction for each 8x8 block
`[out]`	st	scantable for each 8x8 block
`[in]`	zigzag_last_index	index refering to the last non zero coefficient in zigzag order

Definition at line 92 of file mpeg4videoenc.c.

Referenced by decide_ac_pred(), and mpeg4_encode_mb().

Variable Documentation

const int dquant_code[5] = {1,0,9,2,3} [static]

Definition at line 492 of file mpeg4videoenc.c.

AVCodec mpeg4_encoder

Initial value:

 {
    "mpeg4",
    AVMEDIA_TYPE_VIDEO,
    CODEC_ID_MPEG4,
    sizeof(MpegEncContext),
    encode_init,
    MPV_encode_picture,
    MPV_encode_end,
    .pix_fmts= (const enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_NONE},
    .capabilities= CODEC_CAP_DELAY,
    .long_name= NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
}

Definition at line 1341 of file mpeg4videoenc.c.

uint16_t uni_DCtab_chrom_bits[512] [static]

Definition at line 33 of file mpeg4videoenc.c.

Referenced by init_uni_dc_tab(), and mpeg4_encode_dc().

uint8_t uni_DCtab_chrom_len[512] [static]

Definition at line 31 of file mpeg4videoenc.c.

Referenced by encode_init(), init_uni_dc_tab(), mpeg4_encode_dc(), and mpeg4_get_dc_length().

uint16_t uni_DCtab_lum_bits[512] [static]

Definition at line 32 of file mpeg4videoenc.c.

Referenced by init_uni_dc_tab(), and mpeg4_encode_dc().

uint8_t uni_DCtab_lum_len[512] [static]

Definition at line 30 of file mpeg4videoenc.c.

Referenced by encode_init(), init_uni_dc_tab(), mpeg4_encode_dc(), and mpeg4_get_dc_length().

uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2] [static]

Definition at line 39 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_block().

uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2] [static]

Definition at line 40 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_block(), and mpeg4_get_block_length().

uint32_t uni_mpeg4_intra_rl_bits[64 *64 *2 *2] [static]

Definition at line 37 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_block().

uint8_t uni_mpeg4_intra_rl_len[64 *64 *2 *2] [static]

Definition at line 38 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_block(), and mpeg4_get_block_length().


Defines
#define	UNI_MPEG4_ENC_INDEX(last, run, level) ((last)12864 + (run)*128 + (level))
Functions
static int	get_block_rate (MpegEncContext *s, DCTELEM block[64], int block_last_index, uint8_t scantable[64])
	Returns the number of bits that encoding the 8x8 block in block would need.
static void	restore_ac_coeffs (MpegEncContext s, DCTELEM block[6][64], const int dir[6], uint8_t st[6], const int zigzag_last_index[6])
	Restores the ac coefficients in block that have been changed by decide_ac_pred().
static int	decide_ac_pred (MpegEncContext s, DCTELEM block[6][64], const int dir[6], uint8_t st[6], int zigzag_last_index[6])
	Returns the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4.
void	ff_clean_mpeg4_qscales (MpegEncContext *s)
	modify mb_type & qscale so that encoding is acually possible in mpeg4
static void	mpeg4_encode_dc (PutBitContext *s, int level, int n)
	encodes the dc value.
static int	mpeg4_get_dc_length (int level, int n)
static void	mpeg4_encode_block (MpegEncContext s, DCTELEM block, int n, int intra_dc, uint8_t scan_table, PutBitContext dc_pb, PutBitContext *ac_pb)
	encodes a 8x8 block
static int	mpeg4_get_block_length (MpegEncContext s, DCTELEM block, int n, int intra_dc, uint8_t *scan_table)
static void	mpeg4_encode_blocks (MpegEncContext s, DCTELEM block[6][64], int intra_dc[6], uint8_t scan_table, PutBitContext dc_pb, PutBitContext *ac_pb)
void	mpeg4_encode_mb (MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
void	ff_mpeg4_stuffing (PutBitContext *pbc)
	add mpeg4 stuffing bits (01.
void	ff_set_mpeg4_time (MpegEncContext *s)
static void	mpeg4_encode_gop_header (MpegEncContext *s)
static void	mpeg4_encode_visual_object_header (MpegEncContext *s)
static void	mpeg4_encode_vol_header (MpegEncContext *s, int vo_number, int vol_number)
void	mpeg4_encode_picture_header (MpegEncContext *s, int picture_number)
static void	init_uni_dc_tab (void)
static void	init_uni_mpeg4_rl_tab (RLTable rl, uint32_t bits_tab, uint8_t *len_tab)
static av_cold int	encode_init (AVCodecContext *avctx)
void	ff_mpeg4_init_partitions (MpegEncContext *s)
void	ff_mpeg4_merge_partitions (MpegEncContext *s)
void	ff_mpeg4_encode_video_packet_header (MpegEncContext *s)
Variables
static uint8_t	uni_DCtab_lum_len [512]
static uint8_t	uni_DCtab_chrom_len [512]
static uint16_t	uni_DCtab_lum_bits [512]
static uint16_t	uni_DCtab_chrom_bits [512]
static uint32_t	uni_mpeg4_intra_rl_bits [64 64 2 *2]
static uint8_t	uni_mpeg4_intra_rl_len [64 64 2 *2]
static uint32_t	uni_mpeg4_inter_rl_bits [64 64 2 *2]
static uint8_t	uni_mpeg4_inter_rl_len [64 64 2 *2]
static const int	dquant_code [5] = {1,0,9,2,3}
AVCodec	mpeg4_encoder