mpeg4videoenc.c File Reference

#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"

Go to the source code of this file.

Data Structures
struct	Mpeg4EncContext

Macros
#define	UNI_MPEG4_ENC_INDEX(last, run, level)
#define	VLC_NUM_CODES   102
#define	OFFSET(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.
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().
static int	mpeg4_pred_dc (MpegEncContext *s, int n, int *dir_ptr)
	Predict the dc.
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.
void	ff_clean_mpeg4_qscales (MPVEncContext *const s)
	modify mb_type & qscale so that encoding is actually possible in MPEG-4
static void	mpeg4_encode_dc (PutBitContext *s, int level, int n)
	Encode the dc value.
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.
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)
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.
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 )

Value:

((last) * 128 * 64 + (run) * 128 + (level))

Definition at line 64 of file mpeg4videoenc.c.

Referenced by init_uni_mpeg4_rl_tab(), and mpeg4_encode_ac_coeffs().

VLC_NUM_CODES

#define VLC_NUM_CODES   102

Referenced by init_uni_mpeg4_rl_tab().

OFFSET

#define OFFSET

(

x

)

Value:

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.