#include <stdint.h>
#include "get_bits.h"
#include "mpegvideo.h"
#include "mpeg4videodsp.h"
#include "libavutil/mem_internal.h"

Data Structures
struct	Mpeg4DecContext

Functions
int	ff_mpeg4_decode_picture_header (Mpeg4DecContext ctx, GetBitContext gb, int header, int parse_only)
	Decode MPEG-4 headers. More...

void	ff_mpeg4_decode_studio (MpegEncContext s, uint8_t dest_y, uint8_t dest_cb, uint8_t dest_cr, int block_size, int uvlinesize, int dct_linesize, int dct_offset)

void	ff_mpeg4_mcsel_motion (MpegEncContext s, uint8_t dest_y, uint8_t dest_cb, uint8_t dest_cr, uint8_t const ref_picture)

int	ff_mpeg4_decode_partitions (Mpeg4DecContext *ctx)
	Decode the first and second partition. More...

int	ff_mpeg4_decode_video_packet_header (Mpeg4DecContext *ctx)
	Decode the next video packet. More...

int	ff_mpeg4_decode_studio_slice_header (Mpeg4DecContext *ctx)
	Decode the next video packet. More...

int	ff_mpeg4_workaround_bugs (AVCodecContext *avctx)

void	ff_mpeg4_pred_ac (MpegEncContext s, int16_t block, int n, int dir)
	Predict the ac. More...

int	ff_mpeg4_frame_end (AVCodecContext avctx, const uint8_t buf, int buf_size)

Function Documentation

◆ ff_mpeg4_decode_picture_header()

int ff_mpeg4_decode_picture_header	(	Mpeg4DecContext *	ctx,
		GetBitContext *	gb,
		int	header,
		int	parse_only
	)

Decode MPEG-4 headers.

Parameters

header	If set the absence of a VOP is not treated as error; otherwise, it is treated as such.
parse_only	If set, things only relevant to a decoder may be skipped; furthermore, the VLC tables may be uninitialized.

Returns: <0 if an error occurred FRAME_SKIPPED if a not coded VOP is found 0 else

Definition at line 3488 of file mpeg4videodec.c.

Referenced by ff_h263_decode_frame(), and mpeg4_decode_header().

◆ ff_mpeg4_decode_studio()

void ff_mpeg4_decode_studio	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		int	block_size,
		int	uvlinesize,
		int	dct_linesize,
		int	dct_offset
	)

Definition at line 247 of file mpeg4videodec.c.

Referenced by mpv_reconstruct_mb_internal().

◆ ff_mpeg4_mcsel_motion()

void ff_mpeg4_mcsel_motion	(	MpegEncContext *	s,
		uint8_t *	dest_y,
		uint8_t *	dest_cb,
		uint8_t *	dest_cr,
		uint8_t const	ref_picture
	)

Definition at line 232 of file mpeg4videodec.c.

Referenced by mpv_motion_internal().

◆ ff_mpeg4_decode_partitions()

int ff_mpeg4_decode_partitions ( Mpeg4DecContext * ctx )

Decode the first and second partition.

Returns: <0 if error (and sets error type in the error_status_table)

Definition at line 1225 of file mpeg4videodec.c.

Referenced by decode_slice().

◆ ff_mpeg4_decode_video_packet_header()

int ff_mpeg4_decode_video_packet_header ( Mpeg4DecContext * ctx )

Decode the next video packet.

Returns: <0 if something went wrong

Definition at line 695 of file mpeg4videodec.c.

Referenced by ff_h263_resync().

◆ ff_mpeg4_decode_studio_slice_header()

int ff_mpeg4_decode_studio_slice_header ( Mpeg4DecContext * ctx )

Decode the next video packet.

Returns: <0 if something went wrong

Definition at line 794 of file mpeg4videodec.c.

Referenced by decode_slice().

◆ ff_mpeg4_workaround_bugs()

int ff_mpeg4_workaround_bugs ( AVCodecContext * avctx )

Definition at line 2982 of file mpeg4videodec.c.

Referenced by ff_h263_decode_frame().

◆ ff_mpeg4_pred_ac()

void ff_mpeg4_pred_ac	(	MpegEncContext *	s,
		int16_t *	block,
		int	n,
		int	dir
	)

Predict the ac.

Parameters

n	block index (0-3 are luma, 4-5 are chroma)
dir	the ac prediction direction

Definition at line 315 of file mpeg4videodec.c.

Referenced by ff_msmpeg4_decode_block(), and mpeg4_decode_block().

◆ ff_mpeg4_frame_end()

int ff_mpeg4_frame_end	(	AVCodecContext *	avctx,
		const uint8_t *	buf,
		int	buf_size
	)

Definition at line 3646 of file mpeg4videodec.c.