4XM codec. More...

#include <inttypes.h>
#include "libavutil/avassert.h"
#include "libavutil/frame.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "libavutil/mem_internal.h"
#include "libavutil/thread.h"
#include "avcodec.h"
#include "blockdsp.h"
#include "bswapdsp.h"
#include "bytestream.h"
#include "codec_internal.h"
#include "decode.h"
#include "get_bits.h"

Data Structures
struct	CFrameBuffer

struct	FourXContext

Macros
#define	BLOCK_TYPE_VLC_BITS 5

#define	ACDC_VLC_BITS 9

#define	CFRAME_BUFFER_COUNT 100

#define	FIX_1_082392200 70936

#define	FIX_1_414213562 92682

#define	FIX_1_847759065 121095

#define	FIX_2_613125930 171254

#define	MULTIPLY(var, const)

#define	LE_CENTRIC_MUL(dst, src, scale, dc)

Functions
static void	idct (int16_t block[64])

static av_cold void	init_vlcs (void)

static void	init_mv (FourXContext *f, int linesize)

static void	mcdc (uint16_t dst, const uint16_t src, int log2w, int h, int stride, int scale, unsigned dc)

static int	decode_p_block (FourXContext f, uint16_t dst, const uint16_t *src, int log2w, int log2h, int stride)

static int	decode_p_frame (FourXContext f, const uint8_t buf, int length)

static int	decode_i_block (FourXContext f, int16_t block)
	decode block and dequantize.

static void	idct_put (FourXContext *f, int x, int y)

static int	decode_i_mb (FourXContext *f)

static const uint8_t *	read_huffman_tables (FourXContext f, const uint8_t const buf, int buf_size)

static int	mix (int c0, int c1)

static int	decode_i2_frame (FourXContext f, const uint8_t buf, int length)

static int	decode_i_frame (FourXContext f, const uint8_t buf, int length)

static int	decode_frame (AVCodecContext avctx, AVFrame picture, int got_frame, AVPacket avpkt)

static av_cold int	decode_end (AVCodecContext *avctx)

static av_cold int	decode_init (AVCodecContext *avctx)

Variables
static const uint8_t	block_type_tab [2][4][8][2]

static const uint8_t	size2index [4][4]

static const int8_t	mv [256][2]

static const uint8_t	dequant_table [64]

static VLCElem	block_type_vlc [2][4][32]

const FFCodec	ff_fourxm_decoder

Detailed Description

4XM codec.

Definition in file 4xm.c.

Macro Definition Documentation

◆ BLOCK_TYPE_VLC_BITS

#define BLOCK_TYPE_VLC_BITS 5

Definition at line 45 of file 4xm.c.

Referenced by decode_p_block(), and init_vlcs().

◆ ACDC_VLC_BITS

#define ACDC_VLC_BITS 9

Definition at line 46 of file 4xm.c.

Referenced by decode_i_block(), decode_i_frame(), and read_huffman_tables().

◆ CFRAME_BUFFER_COUNT

#define CFRAME_BUFFER_COUNT 100

Definition at line 48 of file 4xm.c.

Referenced by decode_end(), and decode_frame().

◆ FIX_1_082392200

#define FIX_1_082392200 70936

Definition at line 160 of file 4xm.c.

Referenced by ff_column_fidct_c(), ff_row_idct_c(), and idct().

◆ FIX_1_414213562

#define FIX_1_414213562 92682

Definition at line 161 of file 4xm.c.

Referenced by ff_column_fidct_c(), ff_row_idct_c(), and idct().

◆ FIX_1_847759065

#define FIX_1_847759065 121095

Definition at line 162 of file 4xm.c.

Referenced by ff_column_fidct_c(), ff_fdct248_islow(), ff_j_rev_dct(), ff_j_rev_dct4(), ff_jpeg_fdct_islow(), ff_row_idct_c(), idct(), and row_fdct().

◆ FIX_2_613125930

#define FIX_2_613125930 171254

Definition at line 163 of file 4xm.c.

Referenced by ff_column_fidct_c(), ff_row_idct_c(), and idct().

◆ MULTIPLY

#define MULTIPLY	(		var,
			const )

Value:

((int)((var) * (unsigned)(const)) >> 16)

Definition at line 165 of file 4xm.c.

Referenced by idct().

◆ LE_CENTRIC_MUL

#define LE_CENTRIC_MUL	(	dst,
		src,
		scale,
		dc )

Value:

    {                                                    \
        unsigned tmpval = AV_RN32(src) * (scale) + (dc); \
        AV_WN32A(dst, tmpval);                           \
    }

Definition at line 289 of file 4xm.c.

Referenced by mcdc().

Function Documentation

◆ idct()

static void idct ( int16_t block[64] )

static

Definition at line 167 of file 4xm.c.

Referenced by avcodec_dct_init(), check_idct(), check_idct(), check_idct_multiple(), check_luma_dc_wht(), define_itxfm(), define_itxfm(), idct_put(), itxfm_wrapper(), mc_rep_funcs(), and mc_rep_funcs().

◆ init_vlcs()

static av_cold void init_vlcs ( void )

static

Definition at line 252 of file 4xm.c.

Referenced by decode_init(), and decode_init().

◆ init_mv()

static void init_mv	(	FourXContext *	f,
		int	linesize )

static

Definition at line 267 of file 4xm.c.

Referenced by decode_p_frame().

◆ mcdc()

static void mcdc	(	uint16_t *	dst,
		const uint16_t *	src,
		int	log2w,
		int	h,
		int	stride,
		int	scale,
		unsigned	dc )

inlinestatic

Definition at line 296 of file 4xm.c.

Referenced by decode_p_block().

◆ decode_p_block()

static int decode_p_block	(	FourXContext *	f,
		uint16_t *	dst,
		const uint16_t *	src,
		int	log2w,
		int	log2h,
		int	stride )

static

Definition at line 345 of file 4xm.c.

Referenced by decode_p_block(), and decode_p_frame().

◆ decode_p_frame()

static int decode_p_frame	(	FourXContext *	f,
		const uint8_t *	buf,
		int	length )

static

Definition at line 432 of file 4xm.c.

Referenced by decode_frame().

◆ decode_i_block()

static int decode_i_block	(	FourXContext *	f,
		int16_t *	block )

static

decode block and dequantize.

Note this is almost identical to MJPEG.

Definition at line 500 of file 4xm.c.

Referenced by decode_i_mb().

◆ idct_put()

static void idct_put	(	FourXContext *	f,
		int	x,
		int	y )

inlinestatic

Definition at line 559 of file 4xm.c.

Referenced by checkasm_check_vp3dsp(), decode_i_frame(), and dv_decode_video_segment().

◆ decode_i_mb()

static int decode_i_mb ( FourXContext * f )

static

Definition at line 605 of file 4xm.c.

Referenced by decode_i_frame().

◆ read_huffman_tables()

static const uint8_t * read_huffman_tables	(	FourXContext *	f,
		const uint8_t *const	buf,
		int	buf_size )

static

Definition at line 619 of file 4xm.c.

Referenced by decode_i_frame().

◆ mix()

static int mix	(	int	c0,
		int	c1 )

static

◆ decode_i2_frame()

static int decode_i2_frame	(	FourXContext *	f,
		const uint8_t *	buf,
		int	length )

static

Definition at line 725 of file 4xm.c.

Referenced by decode_frame().

◆ decode_i_frame()

static int decode_i_frame	(	FourXContext *	f,
		const uint8_t *	buf,
		int	length )

static

Definition at line 773 of file 4xm.c.

Referenced by decode_frame().

◆ decode_frame()

static int decode_frame	(	AVCodecContext *	avctx,
		AVFrame *	picture,
		int *	got_frame,
		AVPacket *	avpkt )

static

Definition at line 837 of file 4xm.c.

Referenced by sipr_decoder_init().

◆ decode_end()

static av_cold int decode_end ( AVCodecContext * avctx )

static

Definition at line 980 of file 4xm.c.

Referenced by decode_reset(), and ff_vk_decode_frame().

◆ decode_init()

static av_cold int decode_init ( AVCodecContext * avctx )

static

Definition at line 998 of file 4xm.c.

Variable Documentation

◆ block_type_tab

const uint8_t block_type_tab[2][4][8][2]

static

Initial value:

= {
    {
        {    
            { 0, 1 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 30, 5 }, { 31, 5 }, { 0, 0 }
        }, { 
            { 0, 1 }, { 0, 0 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 15, 4 }, { 0, 0 }
        }, { 
            { 0, 1 }, { 2, 2 }, { 0, 0 }, { 6, 3 }, { 14, 4 }, { 15, 4 }, { 0, 0 }
        }, { 
            { 0, 1 }, { 0, 0 }, { 0, 0 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 15, 4 }
        }
    }, {
        {   
            { 1, 2 }, { 4, 3 }, { 5, 3 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 }
        }, {
            { 1, 2 }, { 0, 0 }, { 2, 2 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 }
        }, {
            { 1, 2 }, { 2, 2 }, { 0, 0 }, { 0, 2 }, { 6, 3 }, { 7, 3 }, { 0, 0 }
        }, {
            { 1, 2 }, { 0, 0 }, { 0, 0 }, { 0, 2 }, { 2, 2 }, { 6, 3 }, { 7, 3 }
      }
    }
}

Definition at line 50 of file 4xm.c.

Referenced by init_vlcs().

◆ size2index

const uint8_t size2index[4][4]

static

Initial value:

= {
    { -1, 3, 1, 1 },
    {  3, 0, 0, 0 },
    {  2, 0, 0, 0 },
    {  2, 0, 0, 0 },
}

Definition at line 74 of file 4xm.c.

Referenced by decode_p_block().

◆ mv

const int8_t mv[256][2]

static

Definition at line 81 of file 4xm.c.

Referenced by add_mv_data(), add_mv_data(), affine_mvp_const2(), apply_obmc(), chroma_mc_uni(), clv_decode_frame(), compare_mv_ref_idx(), decode_13(), decode_cu_r(), decode_inter(), decode_mode(), decode_packet(), decode_tile(), derive_affine_mvc(), derive_sb_mv(), derive_spatial_merge_candidates(), dist_scale(), dmvr_mv_refine(), dwt_decode53(), dwt_decode97_float(), dwt_decode97_int(), dwt_encode53(), dwt_encode97_float(), dwt_encode97_int(), encode_frame(), fetch_diagonal_mv(), ff_h264_loop_filter_strength_lasx(), ff_h264_loop_filter_strength_lsx(), ff_h264_loop_filter_strength_mmxext(), ff_h264_loop_filter_strength_msa(), ff_hevc_luma_mv_merge_mode(), ff_hevc_luma_mv_mvp_mode(), ff_me_search_ds(), ff_me_search_epzs(), ff_me_search_esa(), ff_me_search_fss(), ff_me_search_hexbs(), ff_me_search_ntss(), ff_me_search_tdls(), ff_me_search_tss(), ff_me_search_umh(), ff_put_h264_qpel4_mc00_msa(), ff_vp9_fill_mv(), ff_vvc_clip_mv(), ff_vvc_luma_mv_merge_gpm(), ff_vvc_luma_mv_merge_ibc(), ff_vvc_luma_mv_merge_mode(), ff_vvc_mvp_ibc(), ff_vvc_round_mv(), ff_vvc_set_intra_mvf(), ff_vvc_store_sb_mvs(), fill_decode_caches(), filter_frame(), filter_frame(), filter_frame(), find_block_motion(), find_motion(), find_ref_mvs(), h263_get_modb(), h264_er_decode_mb(), hevc_await_progress(), hevc_luma_mv_mvp_mode(), hls_mvd_coding(), ibc_add_mvp(), ibc_check_mv(), ibc_merge_candidates(), init_mv(), init_mv_penalty(), ivi_scale_mv(), luma_mc_uni(), luma_prof(), luma_prof_bi(), luma_prof_uni(), mc(), mc(), mc_bi(), mc_bi_scaled(), mc_chroma_scaled(), mc_chroma_unscaled(), mc_dir_part(), mc_luma_scaled(), mc_luma_unscaled(), mc_part_std(), mc_scaled(), mc_uni(), mc_uni_scaled(), mpeg4_encode_init_static(), mpeg_er_decode_mb(), mv_compression(), mv_merge_pairwise_candidate(), mv_mp_mode_mx(), mv_mp_mode_mx_lt(), mv_read_header(), mv_read_packet(), mv_read_seek(), mvi_update_prediction(), mvp(), mvp_candidate(), mvp_data_ibc(), mvp_history_candidates(), mvp_spatial_candidates(), mvp_temporal_candidates(), obmc_motion(), parse_audio_var(), parse_global_var(), pred_affine_blk(), pred_get_refs(), pred_get_y(), pred_gpm_blk(), pred_pskip_motion(), pred_regular_blk(), pred_spatial_direct_motion(), predict_motion(), predict_mv(), read_mv(), reconstruct(), sb_temproal_luma_motion(), scaled_ref_pos_and_step(), search_mv(), set_mvs(), svq1_decode_motion_vector(), svq1_motion_inter_4v_block(), svq1_motion_inter_block(), svq3_mc_dir(), tgq_decode_mb(), var_size_bme(), vc1_p_h_loop_filter(), vc1_p_v_loop_filter(), vp56_conceal_mv(), vp56_decode_4mv(), vp56_decode_mv(), vp6_filter(), vp7_decode_mvs(), vp8_mc_chroma(), vp8_mc_luma(), and vp8_mc_part().

◆ dequant_table

const uint8_t dequant_table[64]

static

Initial value:

= {
    16, 15, 13, 19, 24, 31, 28, 17,
    17, 23, 25, 31, 36, 63, 45, 21,
    18, 24, 27, 37, 52, 59, 49, 20,
    16, 28, 34, 40, 60, 80, 51, 20,
    18, 31, 48, 66, 68, 86, 56, 21,
    19, 38, 56, 59, 64, 64, 48, 20,
    27, 48, 55, 55, 56, 51, 35, 15,
    20, 35, 34, 32, 31, 22, 15,  8,
}

Definition at line 118 of file 4xm.c.

Referenced by decode_i_block(), and fill_tone_level_array().

◆ block_type_vlc

VLCElem block_type_vlc[2][4][32]

static

Definition at line 129 of file 4xm.c.

Referenced by decode_p_block(), and init_vlcs().

◆ ff_fourxm_decoder

const FFCodec ff_fourxm_decoder

Initial value:

= {
    .p.name         = "4xm",
    CODEC_LONG_NAME("4X Movie"),
    .p.type         = AVMEDIA_TYPE_VIDEO,
    .p.id           = AV_CODEC_ID_4XM,
    .priv_data_size = sizeof(FourXContext),
    .init           = decode_init,
    .close          = decode_end,
    FF_CODEC_DECODE_CB(decode_frame),
    .p.capabilities = AV_CODEC_CAP_DR1,
    .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,
}

Definition at line 1037 of file 4xm.c.

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ BLOCK_TYPE_VLC_BITS

◆ ACDC_VLC_BITS

◆ CFRAME_BUFFER_COUNT

◆ FIX_1_082392200

◆ FIX_1_414213562

◆ FIX_1_847759065

◆ FIX_2_613125930

◆ MULTIPLY

◆ LE_CENTRIC_MUL

Function Documentation

◆ idct()

◆ init_vlcs()

◆ init_mv()

◆ mcdc()

◆ decode_p_block()

◆ decode_p_frame()

◆ decode_i_block()

◆ idct_put()

◆ decode_i_mb()

◆ read_huffman_tables()

◆ mix()

◆ decode_i2_frame()

◆ decode_i_frame()

◆ decode_frame()

◆ decode_end()

◆ decode_init()

Variable Documentation

◆ block_type_tab

◆ size2index

◆ mv

◆ dequant_table

◆ block_type_vlc

◆ ff_fourxm_decoder