path: root/libavcodec/mpegvideodata.c (plain)
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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
6	* License as published by the Free Software Foundation; either
7	* version 2.1 of the License, or (at your option) any later version.
8	*
9	* FFmpeg is distributed in the hope that it will be useful,
10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12	* Lesser General Public License for more details.
13	*
14	* You should have received a copy of the GNU Lesser General Public
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	#include <stdint.h>
20
21	const uint8_t ff_default_chroma_qscale_table[32] = {
22	// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
23	0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
24	16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
25	};
26
27	const uint8_t ff_mpeg2_non_linear_qscale[32] = {
28	0, 1, 2, 3, 4, 5, 6, 7,
29	8, 10, 12, 14, 16, 18, 20, 22,
30	24, 28, 32, 36, 40, 44, 48, 52,
31	56, 64, 72, 80, 88, 96, 104, 112,
32	};
33
34	const uint8_t ff_mpeg1_dc_scale_table[128] = {
35	// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
36	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
37	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
38	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
39	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
40	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
41	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
42	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
43	8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
44	};
45
46	static const uint8_t mpeg2_dc_scale_table1[128] = {
47	// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
48	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
49	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
50	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
51	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
52	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
53	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
54	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
55	4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
56	};
57
58	static const uint8_t mpeg2_dc_scale_table2[128] = {
59	// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
60	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
61	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
62	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
63	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
64	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
65	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
66	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
67	2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
68	};
69
70	static const uint8_t mpeg2_dc_scale_table3[128] = {
71	// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
72	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
73	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
74	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
75	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
76	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
77	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
78	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
79	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
80	};
81
82	const uint8_t *const ff_mpeg2_dc_scale_table[4] = {
83	ff_mpeg1_dc_scale_table,
84	mpeg2_dc_scale_table1,
85	mpeg2_dc_scale_table2,
86	mpeg2_dc_scale_table3,
87	};
88
89	const uint8_t ff_alternate_horizontal_scan[64] = {
90	0, 1, 2, 3, 8, 9, 16, 17,
91	10, 11, 4, 5, 6, 7, 15, 14,
92	13, 12, 19, 18, 24, 25, 32, 33,
93	26, 27, 20, 21, 22, 23, 28, 29,
94	30, 31, 34, 35, 40, 41, 48, 49,
95	42, 43, 36, 37, 38, 39, 44, 45,
96	46, 47, 50, 51, 56, 57, 58, 59,
97	52, 53, 54, 55, 60, 61, 62, 63,
98	};
99
100	const uint8_t ff_alternate_vertical_scan[64] = {
101	0, 8, 16, 24, 1, 9, 2, 10,
102	17, 25, 32, 40, 48, 56, 57, 49,
103	41, 33, 26, 18, 3, 11, 4, 12,
104	19, 27, 34, 42, 50, 58, 35, 43,
105	51, 59, 20, 28, 5, 13, 6, 14,
106	21, 29, 36, 44, 52, 60, 37, 45,
107	53, 61, 22, 30, 7, 15, 23, 31,
108	38, 46, 54, 62, 39, 47, 55, 63,
109	};
110