mpeg4videoenc.c File Reference

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

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 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)
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 (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
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 57 of file mpeg4videoenc.c.

OFFSET

#define OFFSET

(

x

)

offsetof(MpegEncContext, x)

Definition at line 1375 of file mpeg4videoenc.c.

VE

#define VE   AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1376 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 73 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 108 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 139 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 222 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 266 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 279 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 291 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 352 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 406 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 440 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 484 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 864 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 874 of file mpeg4videoenc.c.

Referenced by encode_picture().

mpeg4_encode_gop_header()

static void mpeg4_encode_gop_header ( MpegEncContext *  s )

static

Definition at line 884 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 914 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 958 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

)

Definition at line 1059 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 1119 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 1174 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 1269 of file mpeg4videoenc.c.

Referenced by encode_init().

encode_init()

static av_cold int encode_init ( AVCodecContext *  avctx )

static

Definition at line 1279 of file mpeg4videoenc.c.

ff_mpeg4_init_partitions()

void ff_mpeg4_init_partitions

(

MpegEncContext *

s

)

Definition at line 1324 of file mpeg4videoenc.c.

Referenced by encode_thread().

ff_mpeg4_merge_partitions()

void ff_mpeg4_merge_partitions

(

MpegEncContext *

s

)

Definition at line 1337 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 1363 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 43 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 44 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 45 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 46 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 50 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_block(), 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 51 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_block(), mpeg4_encode_init_static(), 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 52 of file mpeg4videoenc.c.

Referenced by mpeg4_encode_block(), 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 53 of file mpeg4videoenc.c.

Referenced by encode_init(), mpeg4_encode_block(), mpeg4_encode_init_static(), and mpeg4_get_block_length().

dquant_code

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

static

Definition at line 482 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 },
    { "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 1377 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 1389 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(MpegEncContext),
    .init           = encode_init,
    FF_CODEC_ENCODE_CB(ff_mpv_encode_picture),
    .close          = ff_mpv_encode_end,
    .p.pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV420P, AV_PIX_FMT_NONE },
    .p.capabilities = 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 1396 of file mpeg4videoenc.c.