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

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 MPEG-4. More...

void	ff_clean_mpeg4_qscales (MpegEncContext *s)
	modify mb_type & qscale so that encoding is actually possible in MPEG-4 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 MPEG-4 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)

int	ff_mpeg4_encode_picture_header (MpegEncContext *s, int picture_number)

static av_cold void	init_uni_dc_tab (void)

static av_cold 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

◆ UNI_MPEG4_ENC_INDEX

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

Definition at line 48 of file mpeg4videoenc.c.

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

◆ OFFSET

#define OFFSET ( x ) offsetof(MpegEncContext, x)

Definition at line 1373 of file mpeg4videoenc.c.

◆ VE

#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1374 of file mpeg4videoenc.c.

Function Documentation

◆ get_block_rate()

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 64 of file mpeg4videoenc.c.

Referenced by decide_ac_pred().

◆ restore_ac_coeffs()

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 99 of file mpeg4videoenc.c.

Referenced by decide_ac_pred(), and ff_mpeg4_encode_mb().

◆ decide_ac_pred()

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 MPEG-4.

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 130 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

◆ ff_clean_mpeg4_qscales()

void ff_clean_mpeg4_qscales ( MpegEncContext * s )

modify mb_type & qscale so that encoding is actually possible in MPEG-4

Definition at line 213 of file mpeg4videoenc.c.

Referenced by estimate_qp().

◆ mpeg4_encode_dc()

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 257 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_block().

◆ mpeg4_get_dc_length()

static int mpeg4_get_dc_length	(	int	level,
		int	n
	)

inlinestatic

Definition at line 270 of file mpeg4videoenc.c.

Referenced by mpeg4_get_block_length().

◆ mpeg4_encode_block()

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 282 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

◆ mpeg4_get_block_length()

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

static

Definition at line 343 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks().

◆ 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 397 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

◆ get_b_cbp()

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 431 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

◆ ff_mpeg4_encode_mb()

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

Definition at line 475 of file mpeg4videoenc.c.

Referenced by encode_mb_internal().

◆ ff_mpeg4_stuffing()

void ff_mpeg4_stuffing ( PutBitContext * pbc )

add MPEG-4 stuffing bits (01...1)

Definition at line 863 of file mpeg4videoenc.c.

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

◆ ff_set_mpeg4_time()

void ff_set_mpeg4_time ( MpegEncContext * s )

Definition at line 873 of file mpeg4videoenc.c.

Referenced by encode_picture().

◆ mpeg4_encode_gop_header()

static void mpeg4_encode_gop_header ( MpegEncContext * s )

static

Definition at line 883 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_picture_header().

◆ mpeg4_encode_visual_object_header()

static void mpeg4_encode_visual_object_header ( MpegEncContext * s )

static

Definition at line 913 of file mpeg4videoenc.c.

Referenced by encode_init(), and ff_mpeg4_encode_picture_header().

◆ mpeg4_encode_vol_header()

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

static

Definition at line 957 of file mpeg4videoenc.c.

Referenced by encode_init(), and ff_mpeg4_encode_picture_header().

◆ ff_mpeg4_encode_picture_header()

int ff_mpeg4_encode_picture_header	(	MpegEncContext *	s,
		int	picture_number
	)

Definition at line 1061 of file mpeg4videoenc.c.

Referenced by encode_picture().

◆ init_uni_dc_tab()

static av_cold void init_uni_dc_tab ( void )

static

Definition at line 1121 of file mpeg4videoenc.c.

Referenced by encode_init().

◆ init_uni_mpeg4_rl_tab()

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

static

Definition at line 1176 of file mpeg4videoenc.c.

Referenced by encode_init().

◆ encode_init()

static av_cold int encode_init ( AVCodecContext * avctx )

static

Definition at line 1271 of file mpeg4videoenc.c.

◆ ff_mpeg4_init_partitions()

void ff_mpeg4_init_partitions ( MpegEncContext * s )

Definition at line 1322 of file mpeg4videoenc.c.

Referenced by encode_thread().

◆ ff_mpeg4_merge_partitions()

void ff_mpeg4_merge_partitions ( MpegEncContext * s )

Definition at line 1335 of file mpeg4videoenc.c.

Referenced by write_slice_end().

◆ ff_mpeg4_encode_video_packet_header()

void ff_mpeg4_encode_video_packet_header ( MpegEncContext * s )

Definition at line 1361 of file mpeg4videoenc.c.

Referenced by encode_thread().

Variable Documentation

◆ uni_DCtab_lum_len

uint8_t uni_DCtab_lum_len[512]

static

Definition at line 34 of file mpeg4videoenc.c.

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

◆ uni_DCtab_chrom_len

uint8_t uni_DCtab_chrom_len[512]

static

Definition at line 35 of file mpeg4videoenc.c.

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

◆ uni_DCtab_lum_bits

uint16_t uni_DCtab_lum_bits[512]

static

Definition at line 36 of file mpeg4videoenc.c.

Referenced by init_uni_dc_tab(), and mpeg4_encode_dc().

◆ uni_DCtab_chrom_bits

uint16_t uni_DCtab_chrom_bits[512]

static

Definition at line 37 of file mpeg4videoenc.c.

Referenced by init_uni_dc_tab(), and mpeg4_encode_dc().

◆ uni_mpeg4_intra_rl_bits

uint32_t uni_mpeg4_intra_rl_bits[64 *64 *2 *2]

static

Definition at line 41 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_block().

◆ uni_mpeg4_intra_rl_len

uint8_t uni_mpeg4_intra_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().

◆ uni_mpeg4_inter_rl_bits

uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2]

static

Definition at line 43 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_block().

◆ uni_mpeg4_inter_rl_len

uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2]

static

Definition at line 44 of file mpeg4videoenc.c.

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

◆ dquant_code

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

static

Definition at line 473 of file mpeg4videoenc.c.

Referenced by ff_mpeg4_encode_mb().

◆ options

const AVOption options[]

static

Initial value:

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

Definition at line 1375 of file mpeg4videoenc.c.

◆ mpeg4enc_class

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 1382 of file mpeg4videoenc.c.

◆ ff_mpeg4_encoder

AVCodec ff_mpeg4_encoder

Initial value:

= {
    .name           = "mpeg4",
    .long_name      = NULL_IF_CONFIG_SMALL("MPEG-4 part 2"),
    .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   = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS,
    .priv_class     = &mpeg4enc_class,
}

Definition at line 1389 of file mpeg4videoenc.c.

Macros

Functions

Variables

Macro Definition Documentation

◆ UNI_MPEG4_ENC_INDEX

◆ OFFSET

◆ VE

Function Documentation

◆ get_block_rate()

◆ restore_ac_coeffs()

◆ decide_ac_pred()

◆ ff_clean_mpeg4_qscales()

◆ mpeg4_encode_dc()

◆ mpeg4_get_dc_length()

◆ mpeg4_encode_block()

◆ mpeg4_get_block_length()

◆ mpeg4_encode_blocks()

◆ get_b_cbp()

◆ ff_mpeg4_encode_mb()

◆ ff_mpeg4_stuffing()

◆ ff_set_mpeg4_time()

◆ mpeg4_encode_gop_header()

◆ mpeg4_encode_visual_object_header()

◆ mpeg4_encode_vol_header()

◆ ff_mpeg4_encode_picture_header()

◆ init_uni_dc_tab()

◆ init_uni_mpeg4_rl_tab()

◆ encode_init()

◆ ff_mpeg4_init_partitions()

◆ ff_mpeg4_merge_partitions()

◆ ff_mpeg4_encode_video_packet_header()

Variable Documentation

◆ uni_DCtab_lum_len

◆ uni_DCtab_chrom_len

◆ uni_DCtab_lum_bits

◆ uni_DCtab_chrom_bits

◆ uni_mpeg4_intra_rl_bits

◆ uni_mpeg4_intra_rl_len

◆ uni_mpeg4_inter_rl_bits

◆ uni_mpeg4_inter_rl_len

◆ dquant_code

◆ options

◆ mpeg4enc_class

◆ ff_mpeg4_encoder