rv34.c File Reference

#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "libavutil/video_enc_params.h"
#include "avcodec.h"
#include "error_resilience.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mpegvideodec.h"
#include "golomb.h"
#include "internal.h"
#include "mathops.h"
#include "mpeg_er.h"
#include "qpeldsp.h"
#include "rectangle.h"
#include "thread.h"
#include "threadframe.h"
#include "rv34vlc.h"
#include "rv34data.h"
#include "rv34.h"

Go to the source code of this file.

Functions
static void	ZERO8x2 (void *dst, int stride)
av_cold int	ff_rv34_decode_init (AVCodecContext *avctx)
	Initialize decoder. More...
int	ff_rv34_decode_update_thread_context (AVCodecContext *dst, const AVCodecContext *src)
static int	get_slice_offset (AVCodecContext *avctx, const uint8_t *buf, int n, int slice_count, int buf_size)
static int	finish_frame (AVCodecContext *avctx, AVFrame *pict)
static AVRational	update_sar (int old_w, int old_h, AVRational sar, int new_w, int new_h)
int	ff_rv34_decode_frame (AVCodecContext *avctx, AVFrame *pict, int *got_picture_ptr, AVPacket *avpkt)
av_cold int	ff_rv34_decode_end (AVCodecContext *avctx)
RV30/40 4x4 block decoding functions
static int	rv34_decode_cbp (GetBitContext *gb, RV34VLC *vlc, int table)
	Decode coded block pattern. More...
static void	decode_coeff (int16_t *dst, int coef, int esc, GetBitContext *gb, VLC *vlc, int q)
	Get one coefficient value from the bitstream and store it. More...
static void	decode_subblock (int16_t *dst, int code, const int is_block2, GetBitContext *gb, VLC *vlc, int q)
	Decode 2x2 subblock of coefficients. More...
static void	decode_subblock1 (int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q)
	Decode a single coefficient. More...
static void	decode_subblock3 (int16_t *dst, int code, GetBitContext *gb, VLC *vlc, int q_dc, int q_ac1, int q_ac2)
static int	rv34_decode_block (int16_t *dst, GetBitContext *gb, RV34VLC *rvlc, int fc, int sc, int q_dc, int q_ac1, int q_ac2)
	Decode coefficients for 4x4 block. More...
RV30/40 bitstream parsing
int	ff_rv34_get_start_offset (GetBitContext *gb, int mb_size)
	Decode starting slice position. More...
static RV34VLC *	choose_vlc_set (int quant, int mod, int type)
	Select VLC set for decoding from current quantizer, modifier and frame type. More...
static int	rv34_decode_intra_mb_header (RV34DecContext *r, int8_t *intra_types)
	Decode intra macroblock header and return CBP in case of success, -1 otherwise. More...
static int	rv34_decode_inter_mb_header (RV34DecContext *r, int8_t *intra_types)
	Decode inter macroblock header and return CBP in case of success, -1 otherwise. More...

Variables
static const int	rv34_mb_type_to_lavc [12]
	translation of RV30/40 macroblock types to lavc ones More...
static RV34VLC	intra_vlcs [NUM_INTRA_TABLES]
static RV34VLC	inter_vlcs [NUM_INTER_TABLES]

RV30/40 VLC generating functions
static VLCElem	table_data [117592]
static void	rv34_gen_vlc (const uint8_t *bits, int size, VLC *vlc, const uint8_t *syms, int *offset)
	Generate VLC from codeword lengths. More...
static av_cold void	rv34_init_tables (void)
	Initialize all tables. More...

motion vector related code (prediction, reconstruction, motion compensation)
#define	GET_PTS_DIFF(a, b)   (((a) - (b) + 8192) & 0x1FFF)
static const uint8_t	part_sizes_w [RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 }
	macroblock partition width in 8x8 blocks More...
static const uint8_t	part_sizes_h [RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 }
	macroblock partition height in 8x8 blocks More...
static const uint8_t	avail_indexes [4] = { 6, 7, 10, 11 }
	availability index for subblocks More...
static const int	chroma_coeffs [3] = { 0, 3, 5 }
static const int	num_mvs [RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 }
	number of motion vectors in each macroblock type More...
static int	rv34_decode_mv (RV34DecContext *r, int block_type)
	Decode motion vector differences and perform motion vector reconstruction and motion compensation. More...
static void	rv34_pred_mv (RV34DecContext *r, int block_type, int subblock_no, int dmv_no)
	motion vector prediction More...
static int	calc_add_mv (RV34DecContext *r, int dir, int val)
	Calculate motion vector component that should be added for direct blocks. More...
static void	rv34_pred_b_vector (int A[2], int B[2], int C[2], int A_avail, int B_avail, int C_avail, int *mx, int *my)
	Predict motion vector for B-frame macroblock. More...
static void	rv34_pred_mv_b (RV34DecContext *r, int block_type, int dir)
	motion vector prediction for B-frames More...
static void	rv34_pred_mv_rv3 (RV34DecContext *r, int block_type, int dir)
	motion vector prediction - RV3 version More...
static void	rv34_mc (RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir, const int thirdpel, int weighted, qpel_mc_func(*qpel_mc)[16], h264_chroma_mc_func(*chroma_mc))
	generic motion compensation function More...
static void	rv34_mc_1mv (RV34DecContext *r, const int block_type, const int xoff, const int yoff, int mv_off, const int width, const int height, int dir)
static void	rv4_weight (RV34DecContext *r)
static void	rv34_mc_2mv (RV34DecContext *r, const int block_type)
static void	rv34_mc_2mv_skip (RV34DecContext *r)

Macroblock reconstruction functions
static const int	ittrans [9]
	mapping of RV30/40 intra prediction types to standard H.264 types More...
static const int	ittrans16 [4]
	mapping of RV30/40 intra 16x16 prediction types to standard H.264 types More...
static void	rv34_pred_4x4_block (RV34DecContext *r, uint8_t *dst, int stride, int itype, int up, int left, int down, int right)
	Perform 4x4 intra prediction. More...
static int	adjust_pred16 (int itype, int up, int left)
static void	rv34_process_block (RV34DecContext *r, uint8_t *pdst, int stride, int fc, int sc, int q_dc, int q_ac)
static void	rv34_output_i16x16 (RV34DecContext *r, int8_t *intra_types, int cbp)
static void	rv34_output_intra (RV34DecContext *r, int8_t *intra_types, int cbp)
static int	is_mv_diff_gt_3 (int16_t(*motion_val)[2], int step)
static int	rv34_set_deblock_coef (RV34DecContext *r)
static int	rv34_decode_inter_macroblock (RV34DecContext *r, int8_t *intra_types)
static int	rv34_decode_intra_macroblock (RV34DecContext *r, int8_t *intra_types)
static int	check_slice_end (RV34DecContext *r, MpegEncContext *s)
static void	rv34_decoder_free (RV34DecContext *r)
static int	rv34_decoder_alloc (RV34DecContext *r)
static int	rv34_decoder_realloc (RV34DecContext *r)
static int	rv34_decode_slice (RV34DecContext *r, int end, const uint8_t *buf, int buf_size)

Detailed Description

RV30/40 decoder common data

Definition in file rv34.c.

Macro Definition Documentation

GET_PTS_DIFF

#define GET_PTS_DIFF	(		a,
			b
	)		(((a) - (b) + 8192) & 0x1FFF)

Definition at line 510 of file rv34.c.

Function Documentation

ZERO8x2()

static void ZERO8x2 ( void *  dst, int  stride  )

inlinestatic

Definition at line 52 of file rv34.c.

Referenced by rv34_decode_mv(), and rv34_pred_mv_b().

rv34_decode_mv()

static int rv34_decode_mv ( RV34DecContext *  r, int  block_type  )

static

Decode motion vector differences and perform motion vector reconstruction and motion compensation.

Definition at line 853 of file rv34.c.

Referenced by rv34_decode_inter_mb_header().

rv34_gen_vlc()

static void rv34_gen_vlc ( const uint8_t *  bits, int  size, VLC *  vlc, const uint8_t *  syms, int *  offset  )

static

Generate VLC from codeword lengths.

Parameters

bits	codeword lengths (zeroes are accepted)
size	length of input data
vlc	output VLC
insyms	symbols for input codes (NULL for default ones)
num	VLC table number (for static initialization)

Definition at line 94 of file rv34.c.

Referenced by rv34_init_tables().

rv34_init_tables()

static av_cold void rv34_init_tables ( void  )

static

Initialize all tables.

Definition at line 127 of file rv34.c.

Referenced by ff_rv34_decode_init().

rv34_decode_cbp()

static int rv34_decode_cbp ( GetBitContext *  gb, RV34VLC *  vlc, int  table  )

static

Decode coded block pattern.

Definition at line 182 of file rv34.c.

Referenced by rv34_decode_inter_mb_header(), and rv34_decode_intra_mb_header().

decode_coeff()

static void decode_coeff ( int16_t *  dst, int  coef, int  esc, GetBitContext *  gb, VLC *  vlc, int  q  )

inlinestatic

Get one coefficient value from the bitstream and store it.

Definition at line 215 of file rv34.c.

Referenced by decode_subblock(), decode_subblock1(), and decode_subblock3().

decode_subblock()

static void decode_subblock ( int16_t *  dst, int  code, const int  is_block2, GetBitContext *  gb, VLC *  vlc, int  q  )

inlinestatic

Decode 2x2 subblock of coefficients.

Definition at line 235 of file rv34.c.

Referenced by rv34_decode_block().

decode_subblock1()

static void decode_subblock1 ( int16_t *  dst, int  code, GetBitContext *  gb, VLC *  vlc, int  q  )

inlinestatic

Decode a single coefficient.

Definition at line 253 of file rv34.c.

Referenced by rv34_decode_block().

decode_subblock3()

static void decode_subblock3 ( int16_t *  dst, int  code, GetBitContext *  gb, VLC *  vlc, int  q_dc, int  q_ac1, int  q_ac2  )

inlinestatic

Definition at line 259 of file rv34.c.

Referenced by rv34_decode_block().

rv34_decode_block()

static int rv34_decode_block ( int16_t *  dst, GetBitContext *  gb, RV34VLC *  rvlc, int  fc, int  sc, int  q_dc, int  q_ac1, int  q_ac2  )

static

Decode coefficients for 4x4 block.

This is done by filling 2x2 subblocks with decoded coefficients in this order (the same for subblocks and subblock coefficients): o–o / / o–o

Definition at line 281 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_output_i16x16(), and rv34_process_block().

ff_rv34_get_start_offset()

int ff_rv34_get_start_offset	(	GetBitContext *	gb,
		int	mb_size
	)

Decode starting slice position.

common decoding functions

Todo:

Maybe replace with ff_h263_decode_mba() ?

Definition at line 324 of file rv34.c.

Referenced by rv30_parse_slice_header(), and rv40_parse_slice_header().

choose_vlc_set()

static RV34VLC* choose_vlc_set ( int  quant, int  mod, int  type  )

inlinestatic

Select VLC set for decoding from current quantizer, modifier and frame type.

Definition at line 336 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_decode_inter_mb_header(), and rv34_decode_intra_mb_header().

rv34_decode_intra_mb_header()

static int rv34_decode_intra_mb_header ( RV34DecContext *  r, int8_t *  intra_types  )

static

Decode intra macroblock header and return CBP in case of success, -1 otherwise.

Definition at line 348 of file rv34.c.

Referenced by rv34_decode_intra_macroblock().

rv34_decode_inter_mb_header()

static int rv34_decode_inter_mb_header ( RV34DecContext *  r, int8_t *  intra_types  )

static

Decode inter macroblock header and return CBP in case of success, -1 otherwise.

Definition at line 383 of file rv34.c.

Referenced by rv34_decode_inter_macroblock().

rv34_pred_mv()

static void rv34_pred_mv ( RV34DecContext *  r, int  block_type, int  subblock_no, int  dmv_no  )

static

motion vector prediction

Motion prediction performed for the block by using median prediction of motion vectors from the left, top and right top blocks but in corner cases some other vectors may be used instead.

Definition at line 461 of file rv34.c.

Referenced by rv34_decode_mv().

calc_add_mv()

static int calc_add_mv ( RV34DecContext *  r, int  dir, int  val  )

static

Calculate motion vector component that should be added for direct blocks.

Definition at line 515 of file rv34.c.

Referenced by rv34_decode_mv().

rv34_pred_b_vector()

static void rv34_pred_b_vector ( int  A[2], int  B[2], int  C[2], int  A_avail, int  B_avail, int  C_avail, int *  mx, int *  my  )

inlinestatic

Predict motion vector for B-frame macroblock.

Definition at line 525 of file rv34.c.

Referenced by rv34_pred_mv_b().

rv34_pred_mv_b()

static void rv34_pred_mv_b ( RV34DecContext *  r, int  block_type, int  dir  )

static

motion vector prediction for B-frames

Definition at line 545 of file rv34.c.

Referenced by rv34_decode_mv().

rv34_pred_mv_rv3()

static void rv34_pred_mv_rv3 ( RV34DecContext *  r, int  block_type, int  dir  )

static

motion vector prediction - RV3 version

Definition at line 597 of file rv34.c.

Referenced by rv34_decode_mv().

rv34_mc()

static void rv34_mc ( RV34DecContext *  r, const int  block_type, const int  xoff, const int  yoff, int  mv_off, const int  width, const int  height, int  dir, const int  thirdpel, int  weighted, qpel_mc_func(*)  qpel_mc[16], h264_chroma_mc_func *  chroma_mc  )

inlinestatic

generic motion compensation function

Parameters

r	decoder context
block_type	type of the current block
xoff	horizontal offset from the start of the current block
yoff	vertical offset from the start of the current block
mv_off	offset to the motion vector information
width	width of the current partition in 8x8 blocks
height	height of the current partition in 8x8 blocks
dir	motion compensation direction (i.e. from the last or the next reference frame)
thirdpel	motion vectors are specified in 1/3 of pixel
qpel_mc	a set of functions used to perform luma motion compensation
chroma_mc	a set of functions used to perform chroma motion compensation

Definition at line 660 of file rv34.c.

Referenced by rv34_mc_1mv(), rv34_mc_2mv(), and rv34_mc_2mv_skip().

rv34_mc_1mv()

static void rv34_mc_1mv ( RV34DecContext *  r, const int  block_type, const int  xoff, const int  yoff, int  mv_off, const int  width, const int  height, int  dir  )

static

Definition at line 776 of file rv34.c.

Referenced by rv34_decode_mv().

rv4_weight()

static void rv4_weight ( RV34DecContext *  r )

static

Definition at line 785 of file rv34.c.

Referenced by rv34_mc_2mv(), and rv34_mc_2mv_skip().

rv34_mc_2mv()

static void rv34_mc_2mv ( RV34DecContext *  r, const int  block_type  )

static

Definition at line 807 of file rv34.c.

Referenced by rv34_decode_mv().

rv34_mc_2mv_skip()

static void rv34_mc_2mv_skip ( RV34DecContext *  r )

static

Definition at line 826 of file rv34.c.

Referenced by rv34_decode_mv().

rv34_pred_4x4_block()

static void rv34_pred_4x4_block ( RV34DecContext *  r, uint8_t *  dst, int  stride, int  itype, int  up, int  left, int  down, int  right  )

static

Perform 4x4 intra prediction.

Definition at line 967 of file rv34.c.

Referenced by rv34_output_intra().

adjust_pred16()

static int adjust_pred16 ( int  itype, int  up, int  left  )

inlinestatic

Definition at line 994 of file rv34.c.

Referenced by rv34_output_i16x16().

rv34_process_block()

static void rv34_process_block ( RV34DecContext *  r, uint8_t *  pdst, int  stride, int  fc, int  sc, int  q_dc, int  q_ac  )

inlinestatic

Definition at line 1010 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), rv34_output_i16x16(), and rv34_output_intra().

rv34_output_i16x16()

static void rv34_output_i16x16 ( RV34DecContext *  r, int8_t *  intra_types, int  cbp  )

static

Definition at line 1026 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), and rv34_decode_intra_macroblock().

rv34_output_intra()

static void rv34_output_intra ( RV34DecContext *  r, int8_t *  intra_types, int  cbp  )

static

Definition at line 1089 of file rv34.c.

Referenced by rv34_decode_inter_macroblock(), and rv34_decode_intra_macroblock().

is_mv_diff_gt_3()

static int is_mv_diff_gt_3 ( int16_t(*)  motion_val[2], int  step  )

static

Definition at line 1153 of file rv34.c.

Referenced by rv34_set_deblock_coef().

rv34_set_deblock_coef()

static int rv34_set_deblock_coef ( RV34DecContext *  r )

static

Definition at line 1165 of file rv34.c.

Referenced by rv34_decode_inter_macroblock().

rv34_decode_inter_macroblock()

static int rv34_decode_inter_macroblock ( RV34DecContext *  r, int8_t *  intra_types  )

static

Definition at line 1195 of file rv34.c.

Referenced by rv34_decode_slice().

rv34_decode_intra_macroblock()

static int rv34_decode_intra_macroblock ( RV34DecContext *  r, int8_t *  intra_types  )

static

Definition at line 1303 of file rv34.c.

Referenced by rv34_decode_slice().

check_slice_end()

static int check_slice_end ( RV34DecContext *  r, MpegEncContext *  s  )

static

Definition at line 1343 of file rv34.c.

Referenced by rv34_decode_slice().

rv34_decoder_free()

static void rv34_decoder_free ( RV34DecContext *  r )

static

Definition at line 1359 of file rv34.c.

Referenced by ff_rv34_decode_end(), rv34_decoder_alloc(), and rv34_decoder_realloc().

rv34_decoder_alloc()

static int rv34_decoder_alloc ( RV34DecContext *  r )

static

Definition at line 1371 of file rv34.c.

Referenced by ff_rv34_decode_init(), and rv34_decoder_realloc().

rv34_decoder_realloc()

static int rv34_decoder_realloc ( RV34DecContext *  r )

static

Definition at line 1399 of file rv34.c.

Referenced by ff_rv34_decode_frame(), and ff_rv34_decode_update_thread_context().

rv34_decode_slice()

static int rv34_decode_slice ( RV34DecContext *  r, int  end, const uint8_t *  buf, int  buf_size  )

static

Definition at line 1406 of file rv34.c.

Referenced by ff_rv34_decode_frame().

ff_rv34_decode_init()

av_cold int ff_rv34_decode_init

(

AVCodecContext *

avctx

)

Initialize decoder.

Definition at line 1488 of file rv34.c.

Referenced by rv30_decode_init(), and rv40_decode_init().

ff_rv34_decode_update_thread_context()

int ff_rv34_decode_update_thread_context	(	AVCodecContext *	dst,
		const AVCodecContext *	src
	)

Definition at line 1518 of file rv34.c.

get_slice_offset()

static int get_slice_offset ( AVCodecContext *  avctx, const uint8_t *  buf, int  n, int  slice_count, int  buf_size  )

static

Definition at line 1550 of file rv34.c.

Referenced by ff_rv34_decode_frame().

finish_frame()

static int finish_frame ( AVCodecContext *  avctx, AVFrame *  pict  )

static

Definition at line 1559 of file rv34.c.

Referenced by ff_rv34_decode_frame(), and shorten_decode_frame().

update_sar()

static AVRational update_sar ( int  old_w, int  old_h, AVRational  sar, int  new_w, int  new_h  )

static

Definition at line 1589 of file rv34.c.

Referenced by ff_rv34_decode_frame().

ff_rv34_decode_frame()

int ff_rv34_decode_frame	(	AVCodecContext *	avctx,
		AVFrame *	pict,
		int *	got_picture_ptr,
		AVPacket *	avpkt
	)

Definition at line 1599 of file rv34.c.

ff_rv34_decode_end()

av_cold int ff_rv34_decode_end

(

AVCodecContext *

avctx

)

Definition at line 1807 of file rv34.c.

Variable Documentation

rv34_mb_type_to_lavc

const int rv34_mb_type_to_lavc[12]

static

Initial value:

= {
    MB_TYPE_INTRA,
    MB_TYPE_INTRA16x16              | MB_TYPE_SEPARATE_DC,
    MB_TYPE_16x16   | MB_TYPE_L0,
    MB_TYPE_8x8     | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L1,
    MB_TYPE_SKIP,
    MB_TYPE_DIRECT2 | MB_TYPE_16x16,
    MB_TYPE_16x8    | MB_TYPE_L0,
    MB_TYPE_8x16    | MB_TYPE_L0,
    MB_TYPE_16x16   | MB_TYPE_L0L1,
    MB_TYPE_16x16   | MB_TYPE_L0    | MB_TYPE_SEPARATE_DC
}

translation of RV30/40 macroblock types to lavc ones

Definition at line 59 of file rv34.c.

Referenced by rv34_decode_inter_mb_header().

intra_vlcs

RV34VLC intra_vlcs[NUM_INTRA_TABLES]

static

Definition at line 75 of file rv34.c.

Referenced by choose_vlc_set(), and rv34_init_tables().

inter_vlcs

RV34VLC inter_vlcs[NUM_INTER_TABLES]

static

Definition at line 75 of file rv34.c.

Referenced by choose_vlc_set(), and rv34_init_tables().

table_data

VLCElem table_data[117592]

static

Definition at line 84 of file rv34.c.

Referenced by ivi_init_static_vlc(), and rv34_gen_vlc().

part_sizes_w

const uint8_t part_sizes_w[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 2, 1, 2, 2 }

static

macroblock partition width in 8x8 blocks

Definition at line 446 of file rv34.c.

Referenced by rv34_pred_mv().

part_sizes_h

const uint8_t part_sizes_h[RV34_MB_TYPES] = { 2, 2, 2, 1, 2, 2, 2, 2, 1, 2, 2, 2 }

static

macroblock partition height in 8x8 blocks

Definition at line 449 of file rv34.c.

Referenced by rv34_pred_mv().

avail_indexes

const uint8_t avail_indexes[4] = { 6, 7, 10, 11 }

static

availability index for subblocks

Definition at line 452 of file rv34.c.

Referenced by rv34_pred_mv(), and rv34_pred_mv_rv3().

chroma_coeffs

const int chroma_coeffs[3] = { 0, 3, 5 }

static

Definition at line 643 of file rv34.c.

Referenced by rv34_mc().

num_mvs

const int num_mvs[RV34_MB_TYPES] = { 0, 0, 1, 4, 1, 1, 0, 0, 2, 2, 2, 1 }

static

number of motion vectors in each macroblock type

Definition at line 847 of file rv34.c.

Referenced by rv34_decode_mv(), and tgv_decode_inter().

ittrans

const int ittrans[9]

static

Initial value:

= {
 DC_PRED, VERT_PRED, HOR_PRED, DIAG_DOWN_RIGHT_PRED, DIAG_DOWN_LEFT_PRED,
 VERT_RIGHT_PRED, VERT_LEFT_PRED, HOR_UP_PRED, HOR_DOWN_PRED,
}

mapping of RV30/40 intra prediction types to standard H.264 types

Definition at line 954 of file rv34.c.

Referenced by rv34_output_intra().

ittrans16

const int ittrans16[4]

static

Initial value:

= {
 DC_PRED8x8, VERT_PRED8x8, HOR_PRED8x8, PLANE_PRED8x8,
}

mapping of RV30/40 intra 16x16 prediction types to standard H.264 types

Definition at line 960 of file rv34.c.

Referenced by rv34_output_i16x16().