#include "libavutil/attributes.h"
#include "libavutil/log.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/thread.h"
#include "codec_internal.h"
#include "mpegvideo.h"
#include "h263.h"
#include "h263enc.h"
#include "mathops.h"
#include "mpeg4video.h"
#include "mpeg4videodata.h"
#include "mpeg4videodefs.h"
#include "mpeg4videoenc.h"
#include "mpegvideoenc.h"
#include "profiles.h"
#include "put_bits.h"
#include "version.h"

Data Structures
struct	Mpeg4EncContext

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

#define	VLC_NUM_CODES 102

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

#define	VE AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_ENCODING_PARAM

Functions
static Mpeg4EncContext *	mainctx_to_mpeg4 (MPVMainEncContext *m)

static int	get_block_rate (MPVEncContext *const s, int16_t block[64], int block_last_index, const uint8_t scantable[64])
	Return the number of bits that encoding the 8x8 block in block would need. More...

static void	restore_ac_coeffs (MPVEncContext const s, int16_t block[6][64], const int dir[6], const 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	mpeg4_pred_dc (MpegEncContext s, int n, int dir_ptr)
	Predict the dc. More...

static int	decide_ac_pred (MPVEncContext const s, int16_t block[6][64], const int dir[6], const 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 (MPVEncContext *const 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 void	mpeg4_encode_ac_coeffs (const int16_t block[64], const int last_index, int i, const uint8_t const scan_table, PutBitContext const ac_pb, const uint32_t const bits_tab, const uint8_t const len_tab)
	Encode the AC coefficients of an 8x8 block. More...

static void	mpeg4_encode_blocks_inter (MPVEncContext const s, const int16_t block[6][64], PutBitContext ac_pb)

static void	mpeg4_encode_blocks_intra (MPVEncContext const s, const int16_t block[6][64], const int intra_dc[6], const uint8_t const scan_table, PutBitContext dc_pb, PutBitContext *ac_pb)

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

static void	mpeg4_encode_mb (MPVEncContext *const s, int16_t block[][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 (MPVEncContext *const s)

static void	mpeg4_encode_gop_header (MPVMainEncContext *const m)

static void	mpeg4_encode_visual_object_header (MPVMainEncContext *const m)

static void	mpeg4_encode_vol_header (Mpeg4EncContext *const m4, int vo_number, int vol_number)

static int	mpeg4_encode_picture_header (MPVMainEncContext *const m)

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 void	mpeg4_encode_init_static (void)

static av_cold int	encode_init (AVCodecContext *avctx)

void	ff_mpeg4_init_partitions (MPVEncContext *const s)

void	ff_mpeg4_merge_partitions (MPVEncContext *const s)

void	ff_mpeg4_encode_video_packet_header (MPVEncContext *const s)

Variables
static uint8_t	fcode_tab [MAX_MV *2+1]
	Minimal fcode that a motion vector component would need. More...

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

const FFCodec	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 64 of file mpeg4videoenc.c.

◆ VLC_NUM_CODES

#define VLC_NUM_CODES 102

◆ OFFSET

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

Definition at line 1338 of file mpeg4videoenc.c.

◆ VE

#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1339 of file mpeg4videoenc.c.

Function Documentation

◆ mainctx_to_mpeg4()

static Mpeg4EncContext* mainctx_to_mpeg4 ( MPVMainEncContext * m )

inlinestatic

Definition at line 82 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_picture_header().

◆ get_block_rate()

static int get_block_rate	(	MPVEncContext *const	s,
		int16_t	block[64],
		int	block_last_index,
		const 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 91 of file mpeg4videoenc.c.

Referenced by decide_ac_pred().

◆ restore_ac_coeffs()

static void restore_ac_coeffs	(	MPVEncContext *const	s,
		int16_t	block[6][64],
		const int	dir[6],
		const 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->c.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 126 of file mpeg4videoenc.c.

Referenced by decide_ac_pred(), and mpeg4_encode_mb().

◆ mpeg4_pred_dc()

static int mpeg4_pred_dc	(	MpegEncContext *	s,
		int	n,
		int *	dir_ptr
	)

static

Predict the dc.

Parameters

n	block index (0-3 are luma, 4-5 are chroma)
dir_ptr	pointer to an integer where the prediction direction will be stored

Definition at line 154 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ decide_ac_pred()

static int decide_ac_pred	(	MPVEncContext *const	s,
		int16_t	block[6][64],
		const int	dir[6],
		const 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->c.block_last_index and s->c.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 187 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ ff_clean_mpeg4_qscales()

void ff_clean_mpeg4_qscales ( MPVEncContext *const s )

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

Definition at line 270 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 312 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks_intra().

◆ mpeg4_encode_ac_coeffs()

static void mpeg4_encode_ac_coeffs	(	const int16_t	block[64],
		const int	last_index,
		int	i,
		const uint8_t *const	scan_table,
		PutBitContext *const	ac_pb,
		const uint32_t *const	bits_tab,
		const uint8_t *const	len_tab
	)

inlinestatic

Encode the AC coefficients of an 8x8 block.

Definition at line 328 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks_inter(), and mpeg4_encode_blocks_intra().

◆ mpeg4_encode_blocks_inter()

static void mpeg4_encode_blocks_inter	(	MPVEncContext *const	s,
		const int16_t	block[6][64],
		PutBitContext *	ac_pb
	)

static

Definition at line 371 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ mpeg4_encode_blocks_intra()

static void mpeg4_encode_blocks_intra	(	MPVEncContext *const	s,
		const int16_t	block[6][64],
		const int	intra_dc[6],
		const uint8_t const	scan_table,
		PutBitContext *	dc_pb,
		PutBitContext *	ac_pb
	)

static

Definition at line 387 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ get_b_cbp()

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

inlinestatic

Definition at line 408 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ mpeg4_encode_mb()

static void mpeg4_encode_mb	(	MPVEncContext *const	s,
		int16_t	block[][64],
		int	motion_x,
		int	motion_y
	)

static

Definition at line 452 of file mpeg4videoenc.c.

Referenced by encode_init().

◆ ff_mpeg4_stuffing()

void ff_mpeg4_stuffing ( PutBitContext * pbc )

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

Definition at line 835 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 ( MPVEncContext *const s )

Definition at line 843 of file mpeg4videoenc.c.

Referenced by encode_picture().

◆ mpeg4_encode_gop_header()

static void mpeg4_encode_gop_header ( MPVMainEncContext *const m )

static

Definition at line 853 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_picture_header().

◆ mpeg4_encode_visual_object_header()

static void mpeg4_encode_visual_object_header ( MPVMainEncContext *const m )

static

Definition at line 883 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_picture_header().

◆ mpeg4_encode_vol_header()

static void mpeg4_encode_vol_header	(	Mpeg4EncContext *const	m4,
		int	vo_number,
		int	vol_number
	)

static

Definition at line 926 of file mpeg4videoenc.c.

Referenced by encode_init(), and mpeg4_encode_picture_header().

◆ mpeg4_encode_picture_header()

static int mpeg4_encode_picture_header ( MPVMainEncContext *const m )

static

Definition at line 1017 of file mpeg4videoenc.c.

Referenced by encode_init().

◆ init_uni_dc_tab()

static av_cold void init_uni_dc_tab ( void )

static

Definition at line 1079 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_init_static().

◆ 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 1134 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_init_static().

◆ mpeg4_encode_init_static()

static av_cold void mpeg4_encode_init_static ( void )

static

Definition at line 1212 of file mpeg4videoenc.c.

Referenced by encode_init().

◆ encode_init()

static av_cold int encode_init ( AVCodecContext * avctx )

static

Definition at line 1225 of file mpeg4videoenc.c.

◆ ff_mpeg4_init_partitions()

void ff_mpeg4_init_partitions ( MPVEncContext *const s )

Definition at line 1287 of file mpeg4videoenc.c.

Referenced by encode_thread().

◆ ff_mpeg4_merge_partitions()

void ff_mpeg4_merge_partitions ( MPVEncContext *const s )

Definition at line 1300 of file mpeg4videoenc.c.

Referenced by write_slice_end().

◆ ff_mpeg4_encode_video_packet_header()

void ff_mpeg4_encode_video_packet_header ( MPVEncContext *const s )

Definition at line 1326 of file mpeg4videoenc.c.

Referenced by encode_thread().

Variable Documentation

◆ fcode_tab

uint8_t fcode_tab[MAX_MV *2+1]

static

Minimal fcode that a motion vector component would need.

Definition at line 45 of file mpeg4videoenc.c.

Referenced by encode_init(), ff_get_best_fcode(), and mpeg4_encode_init_static().

◆ uni_DCtab_lum_len

uint8_t uni_DCtab_lum_len[512]

static

Definition at line 50 of file mpeg4videoenc.c.

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

◆ uni_DCtab_chrom_len

uint8_t uni_DCtab_chrom_len[512]

static

Definition at line 51 of file mpeg4videoenc.c.

Referenced by init_uni_dc_tab(), and mpeg4_encode_dc().

◆ uni_DCtab_lum_bits

uint16_t uni_DCtab_lum_bits[512]

static

Definition at line 52 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 53 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 57 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks_intra(), and mpeg4_encode_init_static().

◆ uni_mpeg4_intra_rl_len

uint8_t uni_mpeg4_intra_rl_len[64 *64 *2 *2]

static

Definition at line 58 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_blocks_intra(), and mpeg4_encode_init_static().

◆ uni_mpeg4_inter_rl_bits

uint32_t uni_mpeg4_inter_rl_bits[64 *64 *2 *2]

static

Definition at line 59 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_blocks_inter(), and mpeg4_encode_init_static().

◆ uni_mpeg4_inter_rl_len

uint8_t uni_mpeg4_inter_rl_len[64 *64 *2 *2]

static

Definition at line 60 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_blocks_inter(), and mpeg4_encode_init_static().

◆ dquant_code

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

static

Definition at line 450 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_mb().

◆ options

const AVOption options[]

static

Initial value:

= {
    { "data_partitioning", "Use data partitioning.", FF_MPV_OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
    { "alternate_scan",    "Enable alternate scantable.", OFFSET(c.alternate_scan),    AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
    { "mpeg_quant",        "Use MPEG quantizers instead of H.263",
      OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE },
    FF_MPV_COMMON_BFRAME_OPTS
    FF_MPV_COMMON_OPTS
    FF_MPV_COMMON_MOTION_EST_OPTS
    FF_MPEG4_PROFILE_OPTS
    { NULL },
}

Definition at line 1340 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 1352 of file mpeg4videoenc.c.

◆ ff_mpeg4_encoder

const FFCodec ff_mpeg4_encoder

Initial value:

= {
    .p.name         = "mpeg4",
    CODEC_LONG_NAME("MPEG-4 part 2"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_MPEG4,
    .priv_data_size = sizeof(Mpeg4EncContext),
    .init           = encode_init,
    FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
    .close          = ff_mpv_encode_end,
    CODEC_PIXFMTS(AV_PIX_FMT_YUV420P),
    .color_ranges   = AVCOL_RANGE_MPEG,
    .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY |
                      AV_CODEC_CAP_SLICE_THREADS |
                      AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
    .p.priv_class   = &mpeg4enc_class,
}

Definition at line 1359 of file mpeg4videoenc.c.

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ UNI_MPEG4_ENC_INDEX

◆ VLC_NUM_CODES

◆ OFFSET

◆ VE

Function Documentation

◆ mainctx_to_mpeg4()

◆ get_block_rate()

◆ restore_ac_coeffs()

◆ mpeg4_pred_dc()

◆ decide_ac_pred()

◆ ff_clean_mpeg4_qscales()

◆ mpeg4_encode_dc()

◆ mpeg4_encode_ac_coeffs()

◆ mpeg4_encode_blocks_inter()

◆ mpeg4_encode_blocks_intra()

◆ get_b_cbp()

◆ mpeg4_encode_mb()

◆ ff_mpeg4_stuffing()

◆ ff_set_mpeg4_time()

◆ mpeg4_encode_gop_header()

◆ mpeg4_encode_visual_object_header()

◆ mpeg4_encode_vol_header()

◆ mpeg4_encode_picture_header()

◆ init_uni_dc_tab()

◆ init_uni_mpeg4_rl_tab()

◆ mpeg4_encode_init_static()

◆ encode_init()

◆ ff_mpeg4_init_partitions()

◆ ff_mpeg4_merge_partitions()

◆ ff_mpeg4_encode_video_packet_header()

Variable Documentation

◆ fcode_tab

◆ 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