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intrax8.h
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
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15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #ifndef AVCODEC_INTRAX8_H
20 #define AVCODEC_INTRAX8_H
21 
22 #include "blockdsp.h"
23 #include "get_bits.h"
24 #include "idctdsp.h"
25 #include "intrax8dsp.h"
26 #include "wmv2dsp.h"
27 #include "mpegpicture.h"
28 
29 typedef struct IntraX8Context {
30  VLC *j_ac_vlc[4]; // they point to the static j_mb_vlc
33 
35 
36  // set by ff_intrax8_common_init
37  uint8_t *prediction_table; // 2 * (mb_w * 2)
42  int *block_last_index; ///< last nonzero coefficient in block
43  int16_t (*block)[64];
44 
45  // set by the caller codec
49  int quant;
50  int dquant;
51  int qsum;
55 
56  // calculated per frame
61  uint8_t scratchpad[42]; // size of the block is fixed (8x8 plus padding)
62 
63  // changed per block
64  int edges;
65  int flat_dc;
69  int orient;
70  int est_run;
71 
72  // block props
73  int mb_x, mb_y;
76 
77 /**
78  * Initialize IntraX8 frame decoder.
79  * @param avctx pointer to AVCodecContext
80  * @param w pointer to IntraX8Context
81  * @param idsp pointer to IDCTDSPContext
82  * @param block pointer to block array
83  * @param block_last_index pointer to index array
84  * @param mb_width macroblock width
85  * @param mb_height macroblock height
86  * @return 0 on success, a negative AVERROR value on error
87  */
90  int16_t (*block)[64],
91  int block_last_index[12],
92  int mb_width, int mb_height);
93 
94 /**
95  * Destroy IntraX8 frame structure.
96  * @param w pointer to IntraX8Context
97  */
99 
100 /**
101  * Decode single IntraX8 frame.
102  * lowres decoding is theoretically impossible.
103  * @param w pointer to IntraX8Context
104  * @param pict the output Picture containing an AVFrame
105  * @param gb open bitstream reader
106  * @param mb_x pointer to the x coordinate of the current macroblock
107  * @param mb_y pointer to the y coordinate of the current macroblock
108  * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1.
109  * @param quant_offset offset away from zero
110  * @param loopfilter enable filter after decoding a block
111  */
113  GetBitContext *gb, int *mb_x, int *mb_y,
114  int quant, int halfpq,
115  int loopfilter, int lowdelay);
116 
117 #endif /* AVCODEC_INTRAX8_H */
int predicted_dc
Definition: intrax8.h:66
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
WMV2DSPContext wdsp
Definition: intrax8.h:39
uint8_t * dest[3]
Definition: intrax8.h:60
Scantable.
Definition: idctdsp.h:31
static int16_t block[64]
Definition: dct.c:115
IDCTDSPContext idsp
Definition: intrax8.h:47
uint8_t
int chroma_orient
Definition: intrax8.h:68
bitstream reader API header.
int loopfilter
Definition: intrax8.h:52
BlockDSPContext bdsp
Definition: intrax8.h:48
AVFrame * frame
Definition: intrax8.h:53
int * block_last_index
last nonzero coefficient in block
Definition: intrax8.h:42
void ff_intrax8_common_end(IntraX8Context *w)
Destroy IntraX8 frame structure.
Definition: intrax8.c:768
Definition: vlc.h:26
uint8_t scratchpad[42]
Definition: intrax8.h:61
VLC * j_ac_vlc[4]
Definition: intrax8.h:30
Picture.
Definition: mpegpicture.h:45
int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict, GetBitContext *gb, int *mb_x, int *mb_y, int quant, int halfpq, int loopfilter, int lowdelay)
Decode single IntraX8 frame.
Definition: intrax8.c:773
main external API structure.
Definition: avcodec.h:1502
int16_t(* block)[64]
Definition: intrax8.h:43
IntraX8DSPContext dsp
Definition: intrax8.h:46
int quant_dc_chroma
Definition: intrax8.h:57
uint8_t idct_permutation[64]
Definition: intrax8.h:40
ScanTable scantable[3]
Definition: intrax8.h:38
const uint8_t * quant
int ff_intrax8_common_init(AVCodecContext *avctx, IntraX8Context *w, IDCTDSPContext *idsp, int16_t(*block)[64], int block_last_index[12], int mb_width, int mb_height)
Initialize IntraX8 frame decoder.
Definition: intrax8.c:728
GetBitContext * gb
Definition: intrax8.h:54
int divide_quant_dc_luma
Definition: intrax8.h:58
int mb_width
Definition: intrax8.h:74
VLC * j_dc_vlc[3]
Definition: intrax8.h:32
AVCodecContext * avctx
Definition: intrax8.h:41
int raw_orient
Definition: intrax8.h:67
int divide_quant_dc_chroma
Definition: intrax8.h:59
int mb_height
Definition: intrax8.h:74
VLC * j_orient_vlc
Definition: intrax8.h:31
int use_quant_matrix
Definition: intrax8.h:34
uint8_t * prediction_table
Definition: intrax8.h:37