mpeg12enc.c File Reference

MPEG1/2 encoder. More...

#include "avcodec.h"
#include "mathops.h"
#include "mpegvideo.h"
#include "mpeg12.h"
#include "mpeg12data.h"
#include "bytestream.h"
#include "libavutil/attributes.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/avassert.h"
#include "libavutil/timecode.h"

Go to the source code of this file.

Macros
#define	OFFSET(x)   offsetof(MpegEncContext, x)
#define	VE   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
#define	COMMON_OPTS
#define	mpeg12_class(x)

Functions
static void	mpeg1_encode_block (MpegEncContext *s, int16_t *block, int component)
static void	mpeg1_encode_motion (MpegEncContext *s, int val, int f_or_b_code)
static av_cold void	init_uni_ac_vlc (RLTable *rl, uint8_t *uni_ac_vlc_len)
static int	find_frame_rate_index (MpegEncContext *s)
static av_cold int	encode_init (AVCodecContext *avctx)
static void	put_header (MpegEncContext *s, int header)
static void	mpeg1_encode_sequence_header (MpegEncContext *s)
static void	encode_mb_skip_run (MpegEncContext *s, int run)
static av_always_inline void	put_qscale (MpegEncContext *s)
void	ff_mpeg1_encode_slice_header (MpegEncContext *s)
void	ff_mpeg1_encode_picture_header (MpegEncContext *s, int picture_number)
static void	put_mb_modes (MpegEncContext *s, int n, int bits, int has_mv, int field_motion)
static av_always_inline void	mpeg1_encode_mb_internal (MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y, int mb_block_count)
void	ff_mpeg1_encode_mb (MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
av_cold void	ff_mpeg1_encode_init (MpegEncContext *s)
static void	encode_dc (MpegEncContext *s, int diff, int component)
	mpeg12_class (1)

Variables
static const uint8_t	inv_non_linear_qscale [13]
static const uint8_t	svcd_scan_offset_placeholder [14]
static uint8_t	mv_penalty [MAX_FCODE+1][MAX_MV *2+1]
static uint8_t	fcode_tab [MAX_MV *2+1]
static uint8_t	uni_mpeg1_ac_vlc_len [64 *64 *2]
static uint8_t	uni_mpeg2_ac_vlc_len [64 *64 *2]
static uint32_t	mpeg1_lum_dc_uni [512]
static uint32_t	mpeg1_chr_dc_uni [512]
static uint8_t	mpeg1_index_run [2][64]
static int8_t	mpeg1_max_level [2][64]
static const AVOption	mpeg1_options []
static const AVOption	mpeg2_options []
AVCodec	ff_mpeg2video_encoder

Detailed Description

MPEG1/2 encoder.

Definition in file mpeg12enc.c.

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(MpegEncContext, x)

Definition at line 962 of file mpeg12enc.c.

#define VE   AV_OPT_FLAG_ENCODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM

Definition at line 963 of file mpeg12enc.c.

#define COMMON_OPTS

Value:

{ "gop_timecode",        "MPEG GOP Timecode in hh:mm:ss[:;.]ff format", OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, CHAR_MIN, CHAR_MAX, VE },\
    { "intra_vlc",           "Use MPEG-2 intra VLC table.",       OFFSET(intra_vlc_format),    AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },\
    { "drop_frame_timecode", "Timecode is in drop frame format.", OFFSET(drop_frame_timecode), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE}, \
    { "scan_offset",         "Reserve space for SVCD scan offset user data.", OFFSET(scan_offset), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, VE },

Definition at line 964 of file mpeg12enc.c.

#define mpeg12_class

(

x

)

Value:

static const AVClass mpeg## x ##_class = {\
    .class_name   = "mpeg" #x "video encoder",\
    .item_name    = av_default_item_name,\
    .option       = mpeg## x ##_options,\
    .version      = LIBAVUTIL_VERSION_INT,\
};

Definition at line 984 of file mpeg12enc.c.

Function Documentation

static void mpeg1_encode_block ( MpegEncContext *  s, int16_t *  block, int  component  )

static

Definition at line 882 of file mpeg12enc.c.

Referenced by mpeg1_encode_mb_internal().

static void mpeg1_encode_motion ( MpegEncContext *  s, int  val, int  f_or_b_code  )

static

Definition at line 707 of file mpeg12enc.c.

Referenced by mpeg1_encode_mb_internal().

static av_cold void init_uni_ac_vlc ( RLTable *  rl, uint8_t *  uni_ac_vlc_len  )

static

Definition at line 73 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init().

static int find_frame_rate_index ( MpegEncContext *  s )

static

Definition at line 111 of file mpeg12enc.c.

Referenced by encode_init().

static av_cold int encode_init ( AVCodecContext *  avctx )

static

Definition at line 146 of file mpeg12enc.c.

Referenced by mpeg12_class().

static void put_header ( MpegEncContext *  s, int  header  )

static

Definition at line 222 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_picture_header(), ff_mpeg1_encode_slice_header(), and mpeg1_encode_sequence_header().

static void mpeg1_encode_sequence_header ( MpegEncContext *  s )

static

Definition at line 230 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_picture_header().

static void encode_mb_skip_run ( MpegEncContext *  s, int  run  )

inlinestatic

Definition at line 345 of file mpeg12enc.c.

Referenced by mpeg1_encode_mb_internal().

static av_always_inline void put_qscale ( MpegEncContext *  s )

static

Definition at line 354 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_slice_header(), and mpeg1_encode_mb_internal().

void ff_mpeg1_encode_slice_header

(

MpegEncContext *

s

)

Definition at line 364 of file mpeg12enc.c.

Referenced by encode_thread(), and ff_mpeg1_encode_picture_header().

void ff_mpeg1_encode_picture_header	(	MpegEncContext *	s,
		int	picture_number
	)

Definition at line 375 of file mpeg12enc.c.

Referenced by encode_picture().

static void put_mb_modes ( MpegEncContext *  s, int  n, int  bits, int  has_mv, int  field_motion  )

inlinestatic

Definition at line 464 of file mpeg12enc.c.

Referenced by mpeg1_encode_mb_internal().

static av_always_inline void mpeg1_encode_mb_internal ( MpegEncContext *  s, int16_t  block[6][64], int  motion_x, int  motion_y, int  mb_block_count  )

static

Definition at line 475 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_mb().

void ff_mpeg1_encode_mb	(	MpegEncContext *	s,
		int16_t	block[6][64],
		int	motion_x,
		int	motion_y
	)

Definition at line 700 of file mpeg12enc.c.

Referenced by encode_mb_internal().

av_cold void ff_mpeg1_encode_init

(

MpegEncContext *

s

)

Definition at line 747 of file mpeg12enc.c.

Referenced by ff_MPV_encode_init().

static void encode_dc ( MpegEncContext *  s, int  diff, int  component  )

inlinestatic

Definition at line 845 of file mpeg12enc.c.

Referenced by mpeg1_encode_block().

mpeg12_class

(

1

)

Definition at line 992 of file mpeg12enc.c.

Variable Documentation

const uint8_t inv_non_linear_qscale[13]

static

Initial value:

= {
    0, 2, 4, 6, 8,
    9,10,11,12,13,14,15,16,
}

Definition at line 42 of file mpeg12enc.c.

Referenced by put_qscale().

const uint8_t svcd_scan_offset_placeholder[14]

static

Initial value:

= {
    0x10, 0x0E,
    0x00, 0x80, 0x81,
    0x00, 0x80, 0x81,
    0xff, 0xff, 0xff,
    0xff, 0xff, 0xff,
}

Definition at line 47 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_picture_header().

uint8_t mv_penalty[MAX_FCODE+1][MAX_MV *2+1]

static

Definition at line 60 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init().

uint8_t fcode_tab[MAX_MV *2+1]

static

Definition at line 61 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init().

uint8_t uni_mpeg1_ac_vlc_len[64 *64 *2]

static

Definition at line 63 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init().

uint8_t uni_mpeg2_ac_vlc_len[64 *64 *2]

static

Definition at line 64 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init().

uint32_t mpeg1_lum_dc_uni[512]

static

Definition at line 67 of file mpeg12enc.c.

Referenced by encode_dc(), and ff_mpeg1_encode_init().

uint32_t mpeg1_chr_dc_uni[512]

static

Definition at line 68 of file mpeg12enc.c.

Referenced by encode_dc(), and ff_mpeg1_encode_init().

uint8_t mpeg1_index_run[2][64]

static

Definition at line 70 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init(), and mpeg1_encode_block().

int8_t mpeg1_max_level[2][64]

static

Definition at line 71 of file mpeg12enc.c.

Referenced by ff_mpeg1_encode_init(), and mpeg1_encode_block().

const AVOption mpeg1_options[]

static

Initial value:

= {
    COMMON_OPTS
    FF_MPV_COMMON_OPTS
    { NULL },
}

Definition at line 970 of file mpeg12enc.c.

const AVOption mpeg2_options[]

static

Initial value:

= {
    COMMON_OPTS
    { "non_linear_quant",    "Use nonlinear quantizer.",          OFFSET(q_scale_type),         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 976 of file mpeg12enc.c.

AVCodec ff_mpeg2video_encoder

Initial value:

= {
    .name                 = "mpeg2video",
    .type                 = AVMEDIA_TYPE_VIDEO,
    .id                   = AV_CODEC_ID_MPEG2VIDEO,
    .priv_data_size       = sizeof(MpegEncContext),
    .init                 = encode_init,
    .encode2              = ff_MPV_encode_picture,
    .close                = ff_MPV_encode_end,
    .supported_framerates = ff_mpeg2_frame_rate_tab,
    .pix_fmts             = (const enum AVPixelFormat[]){
        AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_NONE
    },
    .capabilities         = CODEC_CAP_DELAY | CODEC_CAP_SLICE_THREADS,
    .long_name            = NULL_IF_CONFIG_SMALL("MPEG-2 video"),
    .priv_class           = &mpeg2_class,
}

Definition at line 1011 of file mpeg12enc.c.