MpegEncContext Struct Reference

#include <mpegvideo.h>

Collaboration diagram for MpegEncContext:


Data Fields
struct AVCodecContext *	avctx
int	width
int	height
	picture size. must be a multiple of 16
int	gop_size
int	intra_only
	if true, only intra pictures are generated
int	bit_rate
	wanted bit rate
enum OutputFormat	out_format
	output format
int	h263_pred
	use mpeg4/h263 ac/dc predictions
int	h263_plus
	h263 plus headers
int	h263_msmpeg4
	generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
int	h263_flv
	use flv h263 header
enum CodecID	codec_id
int	fixed_qscale
	fixed qscale if non zero
int	encoding
	true if we are encoding (vs decoding)
int	flags
	AVCodecContext.flags (HQ, MV4, ...).
int	flags2
	AVCodecContext.flags2.
int	max_b_frames
	max number of b-frames for encoding
int	luma_elim_threshold
int	chroma_elim_threshold
int	strict_std_compliance
	strictly follow the std (MPEG4, ...)
int	workaround_bugs
	workaround bugs in encoders which cannot be detected automatically
PutBitContext	pb
int	context_initialized
int	input_picture_number
	used to set pic->display_picture_number, shouldnt be used for/by anything else
int	coded_picture_number
	used to set pic->coded_picture_number, shouldnt be used for/by anything else
int	picture_number
int	picture_in_gop_number
	0-> first pic in gop, ...
int	b_frames_since_non_b
	used for encoding, relative to not yet reordered input
int64_t	user_specified_pts
	last non zero pts from AVFrame which was passed into avcodec_encode_video()
int	mb_width
int	mb_height
	number of MBs horizontally & vertically
int	mb_stride
	mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
int	b8_stride
	2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
int	b4_stride
	4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
int	h_edge_pos
int	v_edge_pos
	horizontal / vertical position of the right/bottom edge (pixel replication)
int	mb_num
	number of MBs of a picture
int	linesize
	line size, in bytes, may be different from width
int	uvlinesize
	line size, for chroma in bytes, may be different from width
Picture *	picture
	main picture buffer
Picture **	input_picture
	next pictures on display order for encoding
Picture **	reordered_input_picture
	pointer to the next pictures in codedorder for encoding
int	start_mb_y
	start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
int	end_mb_y
	end mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
struct MpegEncContext *	thread_context [MAX_THREADS]
Picture	last_picture
Picture	next_picture
Picture	new_picture
Picture	current_picture
	buffer to store the decompressed current picture
Picture *	last_picture_ptr
	pointer to the previous picture.
Picture *	next_picture_ptr
	pointer to the next picture (for bidir pred)
Picture *	current_picture_ptr
	pointer to the current picture
uint8_t *	visualization_buffer [3]
int	last_dc [3]
	last DC values for MPEG1
int16_t *	dc_val_base
int16_t *	dc_val [3]
	used for mpeg4 DC prediction, all 3 arrays must be continuous
int16_t	dc_cache [4 *5]
int	y_dc_scale
int	c_dc_scale
const uint8_t *	y_dc_scale_table
	qscale -> y_dc_scale table
const uint8_t *	c_dc_scale_table
	qscale -> c_dc_scale table
const uint8_t *	chroma_qscale_table
	qscale -> chroma_qscale (h263)
uint8_t *	coded_block_base
uint8_t *	coded_block
	used for coded block pattern prediction (msmpeg4v3, wmv1)
int16_t(*	ac_val_base )[16]
int16_t(*[3]	ac_val )[16]
	used for for mpeg4 AC prediction, all 3 arrays must be continuous
int	ac_pred
uint8_t *	prev_pict_types
	previous picture types in bitstream order, used for mb skip
int	mb_skipped
	MUST BE SET only during DECODING.
uint8_t *	mbskip_table
uint8_t *	mbintra_table
	used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
uint8_t *	cbp_table
	used to store cbp, ac_pred for partitioned decoding
uint8_t *	pred_dir_table
	used to store pred_dir for partitioned decoding
uint8_t *	allocated_edge_emu_buffer
uint8_t *	edge_emu_buffer
	points into the middle of allocated_edge_emu_buffer
uint8_t *	rd_scratchpad
	scratchpad for rate distortion mb decision
uint8_t *	obmc_scratchpad
uint8_t *	b_scratchpad
	scratchpad used for writing into write only buffers
int	qscale
	QP.
int	chroma_qscale
	chroma QP
int	lambda
	lagrange multipler used in rate distortion
int	lambda2
	(lambda*lambda) >> FF_LAMBDA_SHIFT
int *	lambda_table
int	adaptive_quant
	use adaptive quantization
int	dquant
	qscale difference to prev qscale
int	pict_type
	I_TYPE, P_TYPE, B_TYPE, ...
int	last_pict_type
int	last_non_b_pict_type
	used for mpeg4 gmc b-frames & ratecontrol
int	dropable
int	frame_rate_index
int	unrestricted_mv
	mv can point outside of the coded picture
int	h263_long_vectors
	use horrible h263v1 long vector mode
int	decode
	if 0 then decoding will be skipped (for encoding b frames for example)
DSPContext	dsp
	pointers for accelerated dsp functions
int	f_code
	forward MV resolution
int	b_code
	backward MV resolution for B Frames (mpeg4)
int16_t(*	p_mv_table_base )[2]
int16_t(*	b_forw_mv_table_base )[2]
int16_t(*	b_back_mv_table_base )[2]
int16_t(*	b_bidir_forw_mv_table_base )[2]
int16_t(*	b_bidir_back_mv_table_base )[2]
int16_t(*	b_direct_mv_table_base )[2]
int16_t(*[2][2]	p_field_mv_table_base )[2]
int16_t(*[2][2][2]	b_field_mv_table_base )[2]
int16_t(*	p_mv_table )[2]
	MV table (1MV per MB) p-frame encoding.
int16_t(*	b_forw_mv_table )[2]
	MV table (1MV per MB) forward mode b-frame encoding.
int16_t(*	b_back_mv_table )[2]
	MV table (1MV per MB) backward mode b-frame encoding.
int16_t(*	b_bidir_forw_mv_table )[2]
	MV table (1MV per MB) bidir mode b-frame encoding.
int16_t(*	b_bidir_back_mv_table )[2]
	MV table (1MV per MB) bidir mode b-frame encoding.
int16_t(*	b_direct_mv_table )[2]
	MV table (1MV per MB) direct mode b-frame encoding.
int16_t(*[2][2]	p_field_mv_table )[2]
	MV table (2MV per MB) interlaced p-frame encoding.
int16_t(*[2][2][2]	b_field_mv_table )[2]
	MV table (4MV per MB) interlaced b-frame encoding.
uint8_t *[2]	p_field_select_table
uint8_t *[2][2]	b_field_select_table
int	me_method
	ME algorithm.
int	mv_dir
int	mv_type
int	mv [2][4][2]
int	field_select [2][2]
int	last_mv [2][2][2]
	last MV, used for MV prediction in MPEG1 & B-frame MPEG4
uint8_t *	fcode_tab
	smallest fcode needed for each MV
MotionEstContext	me
int	no_rounding
int	hurry_up
int	mb_x
int	mb_y
int	mb_skip_run
int	mb_intra
uint16_t *	mb_type
	Table for candidate MB types for encoding.
int	block_index [6]
	index to current MB in block based arrays with edges
int	block_wrap [6]
uint8_t *	dest [3]
int *	mb_index2xy
	mb_index -> mb_x + mb_y*mb_stride
uint16_t	intra_matrix [64]
uint16_t	chroma_intra_matrix [64]
uint16_t	inter_matrix [64]
uint16_t	chroma_inter_matrix [64]
int	intra_quant_bias
	bias for the quantizer
int	inter_quant_bias
	bias for the quantizer
int	min_qcoeff
	minimum encodable coefficient
int	max_qcoeff
	maximum encodable coefficient
int	ac_esc_length
	num of bits needed to encode the longest esc
uint8_t *	intra_ac_vlc_length
uint8_t *	intra_ac_vlc_last_length
uint8_t *	inter_ac_vlc_length
uint8_t *	inter_ac_vlc_last_length
uint8_t *	luma_dc_vlc_length
uint8_t *	chroma_dc_vlc_length
int	coded_score [6]
int(*	q_intra_matrix )[64]
int(*	q_inter_matrix )[64]
uint16_t(*	q_intra_matrix16 )[2][64]
uint16_t(*	q_inter_matrix16 )[2][64]
int	block_last_index [12]
	last non zero coefficient in block
ScanTable __align8	intra_scantable
ScanTable	intra_h_scantable
ScanTable	intra_v_scantable
ScanTable	inter_scantable
	if inter == intra then intra should be used to reduce tha cache usage
int(*	dct_error_sum )[64]
int	dct_count [2]
uint16_t(*	dct_offset )[64]
void *	opaque
	private data for the user
int64_t	wanted_bits
int64_t	total_bits
int	frame_bits
	bits used for the current frame
RateControlContext	rc_context
	contains stuff only accessed in ratecontrol.c
int	mv_bits
int	header_bits
int	i_tex_bits
int	p_tex_bits
int	i_count
int	f_count
int	b_count
int	skip_count
int	misc_bits
	cbp, mb_type
int	last_bits
	temp var used for calculating the above vars
int	error_count
uint8_t *	error_status_table
	table of the error status of each MB
int	resync_mb_x
	x position of last resync marker
int	resync_mb_y
	y position of last resync marker
GetBitContext	last_resync_gb
	used to search for the next resync marker
int	mb_num_left
	number of MBs left in this video packet (for partitioned Slices only)
int	next_p_frame_damaged
	set if the next p frame is damaged, to avoid showing trashed b frames
int	error_resilience
ParseContext	parse_context
int	gob_index
int	obmc
	overlapped block motion compensation
int	umvplus
	== H263+ && unrestricted_mv
int	h263_aic
	Advanded INTRA Coding (AIC).
int	h263_aic_dir
	AIC direction: 0 = left, 1 = top.
int	h263_slice_structured
int	alt_inter_vlc
	alternative inter vlc
int	modified_quant
int	loop_filter
int	custom_pcf
int	time_increment_bits
	number of bits to represent the fractional part of time
int	last_time_base
int	time_base
	time in seconds of last I,P,S Frame
int64_t	time
	time of current frame
int64_t	last_non_b_time
uint16_t	pp_time
	time distance between the last 2 p,s,i frames
uint16_t	pb_time
	time distance between the last b and p,s,i frame
uint16_t	pp_field_time
uint16_t	pb_field_time
	like above, just for interlaced
int	shape
int	vol_sprite_usage
int	sprite_width
int	sprite_height
int	sprite_left
int	sprite_top
int	sprite_brightness_change
int	num_sprite_warping_points
int	real_sprite_warping_points
int	sprite_offset [2][2]
	sprite offset[isChroma][isMVY]
int	sprite_delta [2][2]
	sprite_delta [isY][isMVY]
int	sprite_shift [2]
	sprite shift [isChroma]
int	mcsel
int	quant_precision
int	quarter_sample
	1->qpel, 0->half pel ME/MC
int	scalability
int	hierachy_type
int	enhancement_type
int	new_pred
int	reduced_res_vop
int	aspect_ratio_info
int	sprite_warping_accuracy
int	low_latency_sprite
int	data_partitioning
	data partitioning flag from header
int	partitioned_frame
	is current frame partitioned
int	rvlc
	reversible vlc
int	resync_marker
	could this stream contain resync markers
int	low_delay
	no reordering needed / has no b-frames
int	vo_type
int	vol_control_parameters
	does the stream contain the low_delay flag, used to workaround buggy encoders
int	intra_dc_threshold
	QP above whch the ac VLC should be used for intra dc.
PutBitContext	tex_pb
	used for data partitioned VOPs
PutBitContext	pb2
	used for data partitioned VOPs
int	mpeg_quant
int	t_frame
	time distance of first I -> B, used for interlaced b frames
int	padding_bug_score
	used to detect the VERY common padding bug in MPEG4
int	divx_version
int	divx_build
int	divx_packed
uint8_t *	bitstream_buffer
int	bitstream_buffer_size
int	allocated_bitstream_buffer_size
int	xvid_build
int	lavc_build
int	rv10_version
	RV10 version: 0 or 3.
int	rv10_first_dc_coded [3]
struct MJpegContext *	mjpeg_ctx
int	mjpeg_vsample [3]
	vertical sampling factors, default = {2, 1, 1}
int	mjpeg_hsample [3]
	horizontal sampling factors, default = {2, 1, 1}
int	mjpeg_write_tables
	do we want to have quantisation- and huffmantables in the jpeg file ?
int	mjpeg_data_only_frames
	frames only with SOI, SOS and EOI markers
int	mv_table_index
int	rl_table_index
int	rl_chroma_table_index
int	dc_table_index
int	use_skip_mb_code
int	slice_height
	in macroblocks
int	first_slice_line
	used in mpeg4 too to handle resync markers
int	flipflop_rounding
int	msmpeg4_version
	0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
int	per_mb_rl_table
int	esc3_level_length
int	esc3_run_length
int(*	ac_stats )[2][MAX_LEVEL+1][MAX_RUN+1][2]
int	inter_intra_pred
int	mspel
GetBitContext	gb
int	gop_picture_number
	index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
int	last_mv_dir
	last mv_dir, used for b frame encoding
int	broken_link
	no_output_of_prior_pics_flag
uint8_t *	vbv_delay_ptr
	pointer to vbv_delay in the bitstream
int	progressive_sequence
int	mpeg_f_code [2][2]
int	picture_structure
int	intra_dc_precision
int	frame_pred_frame_dct
int	top_field_first
int	concealment_motion_vectors
int	q_scale_type
int	intra_vlc_format
int	alternate_scan
int	repeat_first_field
int	chroma_420_type
int	chroma_format
int	chroma_x_shift
int	chroma_y_shift
int	progressive_frame
int	full_pel [2]
int	interlaced_dct
int	first_slice
int	first_field
	is 1 for the first field of a field picture 0 otherwise
int	rtp_mode
uint8_t *	ptr_lastgob
int	swap_uv
short *	pblocks [12]
DCTELEM(*	block )[64]
	points to one of the following blocks
DCTELEM(*	blocks )[6][64]
int(*	decode_mb )(struct MpegEncContext *s, DCTELEM block[6][64])
void(*	dct_unquantize_mpeg1_intra )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_mpeg1_inter )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_mpeg2_intra )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_mpeg2_inter )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_h263_intra )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_h263_inter )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_h261_intra )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_h261_inter )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_intra )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
void(*	dct_unquantize_inter )(struct MpegEncContext s, DCTELEM block, int n, int qscale)
int(*	dct_quantize )(struct MpegEncContext s, DCTELEM block, int n, int qscale, int *overflow)
int(*	fast_dct_quantize )(struct MpegEncContext s, DCTELEM block, int n, int qscale, int *overflow)
void(*	denoise_dct )(struct MpegEncContext s, DCTELEM block)