mpeg4videoenc.c File Reference

#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "mpegvideo.h"
#include "h263.h"
#include "mpeg4video.h"

Include dependency graph for mpeg4videoenc.c:

Go to the source code of this file.

Macros
#define	UNI_MPEG4_ENC_INDEX(last, run, level)   ((last)*128*64 + (run)*128 + (level))
#define	OFFSET(x)   offsetof(MpegEncContext, x)
#define	VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Functions
static int	get_block_rate (MpegEncContext *s, int16_t block[64], int block_last_index, uint8_t scantable[64])
	Return the number of bits that encoding the 8x8 block in block would need. More...
static void	restore_ac_coeffs (MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], const int zigzag_last_index[6])
	Restore the ac coefficients in block that have been changed by decide_ac_pred(). More...
static int	decide_ac_pred (MpegEncContext *s, int16_t block[6][64], const int dir[6], uint8_t *st[6], int zigzag_last_index[6])
	Return the optimal value (0 or 1) for the ac_pred element for the given MB in mpeg4. More...
void	ff_clean_mpeg4_qscales (MpegEncContext *s)
	modify mb_type & qscale so that encoding is actually possible in mpeg4 More...
static void	mpeg4_encode_dc (PutBitContext *s, int level, int n)
	Encode the dc value. More...
static int	mpeg4_get_dc_length (int level, int n)
static void	mpeg4_encode_block (MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
	Encode an 8x8 block. More...
static int	mpeg4_get_block_length (MpegEncContext *s, int16_t *block, int n, int intra_dc, uint8_t *scan_table)
static void	mpeg4_encode_blocks (MpegEncContext *s, int16_t block[6][64], int intra_dc[6], uint8_t **scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb)
static int	get_b_cbp (MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y, int mb_type)
void	ff_mpeg4_encode_mb (MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
void	ff_mpeg4_stuffing (PutBitContext *pbc)
	add mpeg4 stuffing bits (01...1) More...
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	ff_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}
static const AVOption	options []
static const AVClass	mpeg4enc_class
AVCodec	ff_mpeg4_encoder

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(MpegEncContext, x)

Definition at line 1335 of file mpeg4videoenc.c.

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

Definition at line 45 of file mpeg4videoenc.c.

Referenced by init_uni_mpeg4_rl_tab(), mpeg4_encode_block(), and mpeg4_get_block_length().

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1336 of file mpeg4videoenc.c.

Function Documentation

static int decide_ac_pred ( MpegEncContext *  s, int16_t  block[6][64], const int  dir[6], uint8_t *  st[6], int  zigzag_last_index[6]  )

inlinestatic

Return 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 referring to the last non zero coefficient in zigzag order

Definition at line 125 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

static av_cold int encode_init ( AVCodecContext *  avctx )

static

Definition at line 1231 of file mpeg4videoenc.c.

void ff_clean_mpeg4_qscales

(

MpegEncContext *

s

)

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

Definition at line 204 of file mpeg4videoenc.c.

Referenced by estimate_qp().

void ff_mpeg4_encode_mb	(	MpegEncContext *	s,
		int16_t	block[6][64],
		int	motion_x,
		int	motion_y
	)

Definition at line 471 of file mpeg4videoenc.c.

Referenced by encode_mb_internal().

void ff_mpeg4_encode_picture_header	(	MpegEncContext *	s,
		int	picture_number
	)

Definition at line 1043 of file mpeg4videoenc.c.

Referenced by encode_picture().

void ff_mpeg4_encode_video_packet_header

(

MpegEncContext *

s

)

Definition at line 1323 of file mpeg4videoenc.c.

Referenced by encode_thread().

void ff_mpeg4_init_partitions

(

MpegEncContext *

s

)

Definition at line 1283 of file mpeg4videoenc.c.

Referenced by encode_thread().

void ff_mpeg4_merge_partitions

(

MpegEncContext *

s

)

Definition at line 1296 of file mpeg4videoenc.c.

Referenced by write_slice_end().

void ff_mpeg4_stuffing

(

PutBitContext *

pbc

)

add mpeg4 stuffing bits (01...1)

Definition at line 847 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 856 of file mpeg4videoenc.c.

Referenced by encode_picture().

static int get_b_cbp ( MpegEncContext *  s, int16_t  block[6][64], int  motion_x, int  motion_y, int  mb_type  )

inlinestatic

Definition at line 428 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

static int get_block_rate ( MpegEncContext *  s, int16_t  block[64], int  block_last_index, uint8_t  scantable[64]  )

inlinestatic

Return 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 62 of file mpeg4videoenc.c.

Referenced by decide_ac_pred().

static void init_uni_dc_tab ( void  )

static

Definition at line 1098 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 1150 of file mpeg4videoenc.c.

Referenced by encode_init().

static void mpeg4_encode_block ( MpegEncContext *  s, int16_t *  block, int  n, int  intra_dc, uint8_t *  scan_table, PutBitContext *  dc_pb, PutBitContext *  ac_pb  )

inlinestatic

Encode an 8x8 block.

Parameters

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

Definition at line 297 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

static void mpeg4_encode_blocks ( MpegEncContext *  s, int16_t  block[6][64], int  intra_dc[6], uint8_t **  scan_table, PutBitContext *  dc_pb, PutBitContext *  ac_pb  )

inlinestatic

Definition at line 399 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

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

inlinestatic

Encode the dc value.

Parameters

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

Definition at line 244 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_block().

static void mpeg4_encode_gop_header ( MpegEncContext *  s )

static

Definition at line 865 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_picture_header().

static void mpeg4_encode_visual_object_header ( MpegEncContext *  s )

static

Definition at line 894 of file mpeg4videoenc.c.

Referenced by encode_init(), and ff_mpeg4_encode_picture_header().

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

static

Definition at line 939 of file mpeg4videoenc.c.

Referenced by encode_init(), and ff_mpeg4_encode_picture_header().

static int mpeg4_get_block_length ( MpegEncContext *  s, int16_t *  block, int  n, int  intra_dc, uint8_t *  scan_table  )

static

Definition at line 348 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

static int mpeg4_get_dc_length ( int  level, int  n  )

inlinestatic

Definition at line 285 of file mpeg4videoenc.c.

Referenced by mpeg4_get_block_length().

static void restore_ac_coeffs ( MpegEncContext *  s, int16_t  block[6][64], const int  dir[6], uint8_t *  st[6], const int  zigzag_last_index[6]  )

inlinestatic

Restore 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 referring to the last non zero coefficient in zigzag order

Definition at line 94 of file mpeg4videoenc.c.

Referenced by decide_ac_pred(), and ff_mpeg4_encode_mb().

Variable Documentation

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

static

Definition at line 469 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

AVCodec ff_mpeg4_encoder

Initial value:

= {
    .name           = "mpeg4",
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_MPEG4,
    .priv_data_size = sizeof(MpegEncContext),
    .init           = encode_init,
    .encode2        = ff_MPV_encode_picture,
    .close          = ff_MPV_encode_end,
    .pix_fmts       = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .capabilities   = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
    .priv_class     = &mpeg4enc_class,
}

Definition at line 1351 of file mpeg4videoenc.c.

const AVClass mpeg4enc_class

static

Initial value:

= {
    .class_name = "MPEG4 encoder",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 1344 of file mpeg4videoenc.c.

const AVOption options[]

static

Initial value:

= {
    { "data_partitioning",       "Use data partitioning.",      OFFSET(data_partitioning), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
    { "alternate_scan",          "Enable alternate scantable.", OFFSET(alternate_scan),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },
    FF_MPV_COMMON_OPTS
    { NULL },
}

Definition at line 1337 of file mpeg4videoenc.c.

uint16_t uni_DCtab_chrom_bits[512]

static

Definition at line 35 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 33 of file mpeg4videoenc.c.

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

uint16_t uni_DCtab_lum_bits[512]

static

Definition at line 34 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 32 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 41 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 42 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 39 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 40 of file mpeg4videoenc.c.

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