FFmpeg
asv.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2003 Michael Niedermayer
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * ASUS V1/V2 encoder/decoder common data
24  */
25 
26 #include <stdint.h>
27 
28 #include "libavutil/attributes.h"
29 
30 #include "asv.h"
31 #include "avcodec.h"
32 #include "bswapdsp.h"
33 
34 const uint8_t ff_asv_scantab[64] = {
35  0x00, 0x08, 0x01, 0x09, 0x10, 0x18, 0x11, 0x19,
36  0x02, 0x0A, 0x03, 0x0B, 0x12, 0x1A, 0x13, 0x1B,
37  0x04, 0x0C, 0x05, 0x0D, 0x20, 0x28, 0x21, 0x29,
38  0x06, 0x0E, 0x07, 0x0F, 0x14, 0x1C, 0x15, 0x1D,
39  0x22, 0x2A, 0x23, 0x2B, 0x30, 0x38, 0x31, 0x39,
40  0x16, 0x1E, 0x17, 0x1F, 0x24, 0x2C, 0x25, 0x2D,
41  0x32, 0x3A, 0x33, 0x3B, 0x26, 0x2E, 0x27, 0x2F,
42  0x34, 0x3C, 0x35, 0x3D, 0x36, 0x3E, 0x37, 0x3F,
43 };
44 
45 const uint8_t ff_asv_ccp_tab[17][2] = {
46  { 0x2, 2 }, { 0x7, 5 }, { 0xB, 5 }, { 0x3, 5 },
47  { 0xD, 5 }, { 0x5, 5 }, { 0x9, 5 }, { 0x1, 5 },
48  { 0xE, 5 }, { 0x6, 5 }, { 0xA, 5 }, { 0x2, 5 },
49  { 0xC, 5 }, { 0x4, 5 }, { 0x8, 5 }, { 0x3, 2 },
50  { 0xF, 5 }, // EOB
51 };
52 
53 const uint8_t ff_asv_level_tab[7][2] = {
54  { 3, 4 }, { 3, 3 }, { 3, 2 }, { 0, 3 }, { 2, 2 }, { 2, 3 }, { 2, 4 }
55 };
56 
57 const uint8_t ff_asv_dc_ccp_tab[8][2] = {
58  { 0x2, 2 }, { 0xB, 4 }, { 0xF, 4 }, { 0x3, 4 },
59  { 0x5, 3 }, { 0x7, 4 }, { 0x1, 3 }, { 0x0, 2 },
60 };
61 
62 const uint8_t ff_asv_ac_ccp_tab[16][2] = {
63  { 0x00, 2 }, { 0x37, 6 }, { 0x05, 4 }, { 0x17, 6 },
64  { 0x02, 3 }, { 0x27, 6 }, { 0x0F, 6 }, { 0x07, 6 },
65  { 0x06, 3 }, { 0x2F, 6 }, { 0x01, 4 }, { 0x1F, 5 },
66  { 0x09, 4 }, { 0x0D, 4 }, { 0x0B, 4 }, { 0x03, 4 },
67 };
68 
69 const uint16_t ff_asv2_level_tab[63][2] = {
70  { 0x3F0, 10 }, { 0x3D0, 10 }, { 0x3B0, 10 }, { 0x390, 10 }, { 0x370, 10 },
71  { 0x350, 10 }, { 0x330, 10 }, { 0x310, 10 }, { 0x2F0, 10 }, { 0x2D0, 10 },
72  { 0x2B0, 10 }, { 0x290, 10 }, { 0x270, 10 }, { 0x250, 10 }, { 0x230, 10 },
73  { 0x210, 10 },
74  { 0x0F8, 8 }, { 0x0E8, 8 }, { 0x0D8, 8 }, { 0x0C8, 8 }, { 0x0B8, 8 },
75  { 0x0A8, 8 }, { 0x098, 8 }, { 0x088, 8 },
76  { 0x03C, 6 }, { 0x034, 6 }, { 0x02C, 6 }, { 0x024, 6 },
77  { 0x00E, 4 }, { 0x00A, 4 },
78  { 0x003, 2 },
79  { 0x000, 5 },
80  { 0x001, 2 },
81  { 0x002, 4 }, { 0x006, 4 },
82  { 0x004, 6 }, { 0x00C, 6 }, { 0x014, 6 }, { 0x01C, 6 },
83  { 0x008, 8 }, { 0x018, 8 }, { 0x028, 8 }, { 0x038, 8 }, { 0x048, 8 },
84  { 0x058, 8 }, { 0x068, 8 }, { 0x078, 8 },
85  { 0x010, 10 }, { 0x030, 10 }, { 0x050, 10 }, { 0x070, 10 }, { 0x090, 10 },
86  { 0x0B0, 10 }, { 0x0D0, 10 }, { 0x0F0, 10 }, { 0x110, 10 }, { 0x130, 10 },
87  { 0x150, 10 }, { 0x170, 10 }, { 0x190, 10 }, { 0x1B0, 10 }, { 0x1D0, 10 },
88  { 0x1F0, 10 }
89 };
90 
92 {
93  ASVCommonContext *const a = avctx->priv_data;
94 
95  ff_bswapdsp_init(&a->bbdsp);
96 
97  a->mb_width = (avctx->width + 15) / 16;
98  a->mb_height = (avctx->height + 15) / 16;
99  a->mb_width2 = (avctx->width + 0) / 16;
100  a->mb_height2 = (avctx->height + 0) / 16;
101 
102  a->avctx = avctx;
103 }
bswapdsp.h
ff_asv_dc_ccp_tab
const uint8_t ff_asv_dc_ccp_tab[8][2]
Definition: asv.c:57
ff_asv_level_tab
const uint8_t ff_asv_level_tab[7][2]
Definition: asv.c:53
ff_asv2_level_tab
const uint16_t ff_asv2_level_tab[63][2]
Definition: asv.c:69
ff_asv_scantab
const uint8_t ff_asv_scantab[64]
Definition: asv.c:34
ASVCommonContext
Definition: asv.h:34
av_cold
#define av_cold
Definition: attributes.h:90
asv.h
ff_asv_ac_ccp_tab
const uint8_t ff_asv_ac_ccp_tab[16][2]
Definition: asv.c:62
ff_bswapdsp_init
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
Definition: bswapdsp.c:49
ff_asv_common_init
av_cold void ff_asv_common_init(AVCodecContext *avctx)
Definition: asv.c:91
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
attributes.h
AVCodecContext::height
int height
Definition: avcodec.h:618
avcodec.h
AVCodecContext
main external API structure.
Definition: avcodec.h:445
ff_asv_ccp_tab
const uint8_t ff_asv_ccp_tab[17][2]
Definition: asv.c:45
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:472
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:618