#include "libavutil/avassert.h"
#include "avcodec.h"
#include "get_bits.h"
#include "golomb.h"
#include "cavs.h"
#include "internal.h"
#include "mpeg12data.h"

Macros
#define	EOB 0, 0, 0

#define	TMP_UNUSED_INX 7

Functions
static void	store_mvs (AVSContext *h)

static void	mv_pred_direct (AVSContext h, cavs_vector pmv_fw, cavs_vector *col_mv)

static void	mv_pred_sym (AVSContext h, cavs_vector src, enum cavs_block size)

static int	get_ue_code (GetBitContext *gb, int order)
	kth-order exponential golomb code More...

static int	dequant (AVSContext h, int16_t level_buf, uint8_t run_buf, int16_t dst, int mul, int shift, int coeff_num)

static int	decode_residual_block (AVSContext h, GetBitContext gb, const struct dec_2dvlc r, int esc_golomb_order, int qp, uint8_t dst, ptrdiff_t stride)
	decode coefficients from one 8x8 block, dequantize, inverse transform and add them to sample block More...

static int	decode_residual_chroma (AVSContext *h)

static int	decode_residual_inter (AVSContext *h)

static void	set_mv_intra (AVSContext *h)

static int	decode_mb_i (AVSContext *h, int cbp_code)

static void	set_intra_mode_default (AVSContext *h)

static void	decode_mb_p (AVSContext *h, enum cavs_mb mb_type)

static int	decode_mb_b (AVSContext *h, enum cavs_mb mb_type)

static int	decode_slice_header (AVSContext h, GetBitContext gb)

static int	check_for_slice (AVSContext *h)

static int	decode_pic (AVSContext *h)

static int	decode_seq_header (AVSContext *h)

static void	cavs_flush (AVCodecContext *avctx)

static int	cavs_decode_frame (AVCodecContext avctx, void data, int got_frame, AVPacket avpkt)

Variables
static const uint8_t	mv_scan [4]

static const uint8_t	cbp_tab [64][2]

static const uint8_t	scan3x3 [4] = { 4, 5, 7, 8 }

static const uint8_t	dequant_shift [64]

static const uint16_t	dequant_mul [64]

static const struct dec_2dvlc	intra_dec [7]

static const struct dec_2dvlc	inter_dec [7]

static const struct dec_2dvlc	chroma_dec [5]

AVCodec	ff_cavs_decoder

Detailed Description

Chinese AVS video (AVS1-P2, JiZhun profile) decoder

Author: Stefan Gehrer stefa.nosp@m.n.ge.nosp@m.hrer@.nosp@m.gmx..nosp@m.de

Definition in file cavsdec.c.

Macro Definition Documentation

◆ EOB

#define EOB 0, 0, 0

Definition at line 76 of file cavsdec.c.

◆ TMP_UNUSED_INX

#define TMP_UNUSED_INX 7

Function Documentation

◆ store_mvs()

static void store_mvs ( AVSContext * h )

inlinestatic

Definition at line 456 of file cavsdec.c.

Referenced by decode_mb_p().

◆ mv_pred_direct()

static void mv_pred_direct	(	AVSContext *	h,
		cavs_vector *	pmv_fw,
		cavs_vector *	col_mv
	)

inlinestatic

Definition at line 464 of file cavsdec.c.

Referenced by decode_mb_b().

◆ mv_pred_sym()

static void mv_pred_sym	(	AVSContext *	h,
		cavs_vector *	src,
		enum cavs_block	size
	)

inlinestatic

Definition at line 483 of file cavsdec.c.

Referenced by decode_mb_b().

◆ get_ue_code()

static int get_ue_code	(	GetBitContext *	gb,
		int	order
	)

inlinestatic

kth-order exponential golomb code

Definition at line 503 of file cavsdec.c.

Referenced by decode_residual_block().

◆ dequant()

static int dequant	(	AVSContext *	h,
		int16_t *	level_buf,
		uint8_t *	run_buf,
		int16_t *	dst,
		int	mul,
		int	shift,
		int	coeff_num
	)

inlinestatic

Definition at line 516 of file cavsdec.c.

Referenced by decode_residual_block().

◆ decode_residual_block()

static int decode_residual_block	(	AVSContext *	h,
		GetBitContext *	gb,
		const struct dec_2dvlc *	r,
		int	esc_golomb_order,
		int	qp,
		uint8_t *	dst,
		ptrdiff_t	stride
	)

static

decode coefficients from one 8x8 block, dequantize, inverse transform and add them to sample block

Parameters

r	pointer to 2D VLC table
esc_golomb_order	escape codes are k-golomb with this order k
qp	quantizer
dst	location of sample block
stride	line stride in frame buffer

Definition at line 546 of file cavsdec.c.

Referenced by decode_mb_i(), decode_residual_chroma(), and decode_residual_inter().

◆ decode_residual_chroma()

static int decode_residual_chroma ( AVSContext * h )

inlinestatic

Definition at line 594 of file cavsdec.c.

Referenced by decode_mb_i(), and decode_residual_inter().

◆ decode_residual_inter()

static int decode_residual_inter ( AVSContext * h )

inlinestatic

Definition at line 611 of file cavsdec.c.

Referenced by decode_mb_b(), and decode_mb_p().

◆ set_mv_intra()

static void set_mv_intra ( AVSContext * h )

inlinestatic

Definition at line 641 of file cavsdec.c.

Referenced by decode_mb_i().

◆ decode_mb_i()

static int decode_mb_i	(	AVSContext *	h,
		int	cbp_code
	)

static

Definition at line 651 of file cavsdec.c.

Referenced by decode_pic().

◆ set_intra_mode_default()

static void set_intra_mode_default ( AVSContext * h )

inlinestatic

Definition at line 725 of file cavsdec.c.

Referenced by decode_mb_b(), and decode_mb_p().

◆ decode_mb_p()

static void decode_mb_p	(	AVSContext *	h,
		enum cavs_mb	mb_type
	)

static

Definition at line 736 of file cavsdec.c.

Referenced by decode_pic().

◆ decode_mb_b()

static int decode_mb_b	(	AVSContext *	h,
		enum cavs_mb	mb_type
	)

static

Definition at line 781 of file cavsdec.c.

Referenced by decode_pic().

◆ decode_slice_header()

static int decode_slice_header	(	AVSContext *	h,
		GetBitContext *	gb
	)

inlinestatic

Definition at line 924 of file cavsdec.c.

Referenced by cavs_decode_frame(), and check_for_slice().

◆ check_for_slice()

static int check_for_slice ( AVSContext * h )

inlinestatic

Definition at line 953 of file cavsdec.c.

Referenced by decode_pic().

◆ decode_pic()

static int decode_pic ( AVSContext * h )

static

Definition at line 981 of file cavsdec.c.

Referenced by cavs_decode_frame().

◆ decode_seq_header()

static int decode_seq_header ( AVSContext * h )

static

Definition at line 1152 of file cavsdec.c.

Referenced by cavs_decode_frame().

◆ cavs_flush()

static void cavs_flush ( AVCodecContext * avctx )

static

Definition at line 1202 of file cavsdec.c.

◆ cavs_decode_frame()

static int cavs_decode_frame	(	AVCodecContext *	avctx,
		void *	data,
		int *	got_frame,
		AVPacket *	avpkt
	)

static

Definition at line 1208 of file cavsdec.c.

Variable Documentation

◆ mv_scan

const uint8_t mv_scan[4]

static

Initial value:

= {
    MV_FWD_X0, MV_FWD_X1,
    MV_FWD_X2, MV_FWD_X3
}

Definition at line 36 of file cavsdec.c.

Referenced by decode_mb_b().

◆ cbp_tab

const uint8_t cbp_tab[64][2]

static

Initial value:

= {
  { 63,  0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, {  0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
  {  7, 14 }, {  5, 11 }, { 10, 12 }, {  8,  5 }, { 12, 10 }, { 61,  7 }, {  4, 48 }, { 55,  3 },
  {  1,  2 }, {  2,  8 }, { 59,  4 }, {  3,  1 }, { 62, 61 }, {  9, 55 }, {  6, 59 }, { 29, 62 },
  { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53,  9 }, { 30,  6 },
  { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
  { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
  { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
  { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
}

Definition at line 41 of file cavsdec.c.

Referenced by decode_mb_i(), and decode_residual_inter().

◆ scan3x3

const uint8_t scan3x3[4] = { 4, 5, 7, 8 }

static

Definition at line 52 of file cavsdec.c.

Referenced by decode_mb_i().

◆ dequant_shift

const uint8_t dequant_shift[64]

static

Initial value:

= {
  14, 14, 14, 14, 14, 14, 14, 14,
  13, 13, 13, 13, 13, 13, 13, 13,
  13, 12, 12, 12, 12, 12, 12, 12,
  11, 11, 11, 11, 11, 11, 11, 11,
  11, 10, 10, 10, 10, 10, 10, 10,
  10,  9,  9,  9,  9,  9,  9,  9,
  9,   8,  8,  8,  8,  8,  8,  8,
  7,   7,  7,  7,  7,  7,  7,  7
}

Definition at line 54 of file cavsdec.c.

Referenced by decode_residual_block().

◆ dequant_mul

const uint16_t dequant_mul[64]

static

Initial value:

= {
  32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
  32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
  65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
  32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
  65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
  65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
  65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
  32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
}

Definition at line 65 of file cavsdec.c.

Referenced by decode_residual_block().

◆ intra_dec

const struct dec_2dvlc intra_dec[7]

static

Definition at line 78 of file cavsdec.c.

Referenced by decode_mb_i().

◆ inter_dec

const struct dec_2dvlc inter_dec[7]

static

Definition at line 214 of file cavsdec.c.

Referenced by decode_residual_inter().

◆ chroma_dec

const struct dec_2dvlc chroma_dec[5]

static

Definition at line 350 of file cavsdec.c.

Referenced by decode_residual_chroma().

◆ ff_cavs_decoder

AVCodec ff_cavs_decoder

Initial value:

= {
    .name           = "cavs",
    .long_name      = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
    .type           = AVMEDIA_TYPE_VIDEO,
    .id             = AV_CODEC_ID_CAVS,
    .priv_data_size = sizeof(AVSContext),
    .init           = ff_cavs_init,
    .close          = ff_cavs_end,
    .decode         = cavs_decode_frame,
    .capabilities   = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY,
    .flush          = cavs_flush,
}

Definition at line 1292 of file cavsdec.c.

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ EOB

◆ TMP_UNUSED_INX

Function Documentation

◆ store_mvs()

◆ mv_pred_direct()

◆ mv_pred_sym()

◆ get_ue_code()

◆ dequant()

◆ decode_residual_block()

◆ decode_residual_chroma()

◆ decode_residual_inter()

◆ set_mv_intra()

◆ decode_mb_i()

◆ set_intra_mode_default()

◆ decode_mb_p()

◆ decode_mb_b()

◆ decode_slice_header()

◆ check_for_slice()

◆ decode_pic()

◆ decode_seq_header()

◆ cavs_flush()

◆ cavs_decode_frame()

Variable Documentation

◆ mv_scan

◆ cbp_tab

◆ scan3x3

◆ dequant_shift

◆ dequant_mul

◆ intra_dec

◆ inter_dec

◆ chroma_dec

◆ ff_cavs_decoder