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avcodec/imm4: Reduce the size of tables used to initialize VLCs

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By switching from ff_init_vlc_sparse() to ff_init_vlc_from_lengths() one
can remove arrays of codes in cases where there were already symbols
tables.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2020-11-16 14:43:01 +01:00
parent c14656c170
commit dc4c9744eb
1 changed files with 38 additions and 52 deletions
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90
libavcodec/imm4.c
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@ -34,6 +34,8 @@
#include "internal.h"
#define CBPLO_VLC_BITS 6
#define BLKTYPE_VLC_BITS 9
#define BLOCK_VLC_BITS 12
typedef struct IMM4Context {
BswapDSPContext bdsp;
@ -60,16 +62,9 @@ static const uint8_t inter_cb[] = {
30, 20, 15
};
static const uint8_t cbplo_symbols[] = {
0, 0, 1, 1, 2, 2, 3, 3
};
static const uint8_t cbplo_bits[] = {
1, 4, 3, 6, 3, 6, 3, 6
};
static const uint8_t cbplo_codes[] = {
1, 1, 1, 1, 2, 2, 3, 3
static const uint8_t cbplo[][2] = {
{ 0,-6 }, { 0x01, 6 }, { 0x02, 6 }, { 0x03, 6 }, { 0x00, 4 },
{ 0x01, 3 }, { 0x02, 3 }, { 0x03, 3 }, { 0x00, 1 },
};
static const uint8_t cbphi_bits[] = {
@ -80,47 +75,36 @@ static const uint8_t cbphi_codes[] = {
3, 5, 4, 9, 3, 7, 2, 11, 2, 3, 5, 10, 4, 8, 6, 3
};
static const uint8_t blktype_symbols[] = {
0, 1, 2, 3, 4, 16, 17, 18, 19, 20, 32, 33, 34, 35, 48, 50, 51, 52
};
static const uint8_t blktype_bits[] = {
1, 3, 3, 5, 6, 4, 7, 7, 8, 9, 4, 7, 7, 8, 6, 8, 7, 9
};
static const uint8_t blktype_codes[] = {
1, 3, 2, 3, 4, 3, 7, 5, 4, 4, 2, 6, 4, 3, 5, 5, 3, 2
static const uint8_t blktype[][2] = {
{ 0,-8 }, { 0x34, 9 }, { 0,-9 }, { 0x14, 9 }, { 0,-9 },
{ 0x23, 8 }, { 0x13, 8 }, { 0x32, 8 }, { 0x33, 7 }, { 0x22, 7 },
{ 0x12, 7 }, { 0x21, 7 }, { 0x11, 7 }, { 0x04, 6 }, { 0x30, 6 },
{ 0x03, 5 }, { 0x20, 4 }, { 0x10, 4 }, { 0x02, 3 }, { 0x01, 3 },
{ 0x00, 1 },
};
static const uint16_t block_symbols[] = {
0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xA, 0xB, 0xC, 0x81, 0x82, 0x83,
0x84, 0x85, 0x86, 0x101, 0x102, 0x103, 0x104, 0x181, 0x182, 0x183, 0x201, 0x202,
0x203, 0x281, 0x282, 0x283, 0x301, 0x302, 0x303, 0x381, 0x382, 0x401, 0x402,
0x481, 0x482, 0x501, 0x502, 0x581, 0x601, 0x681, 0x701, 0x781, 0x801, 0x881,
0x901, 0x981, 0xA01, 0xA81, 0xB01, 0xB81, 0xC01, 0xC81, 0xD01, 0x4001, 0x4002,
0x4003, 0x4081, 0x4082, 0x4101, 0x4181, 0x4201, 0x4281, 0x4301, 0x4381, 0x4401,
0x4481, 0x4501, 0x4581, 0x4601, 0x4681, 0x4701, 0x4781, 0x4801, 0x4881, 0x4901,
0x4981, 0x4A01, 0x4A81, 0x4B01, 0x4B81, 0x4C01, 0x4C81, 0x4D01, 0x4D81, 0x4E01,
0x4E81, 0x4F01, 0x4F81, 0x5001, 0x5081, 0x5101, 0x5181, 0x5201, 0x5281, 0x5301,
0x5381, 0x5401
0, 0x4082, 0x4003, 0x000B, 0x000A, 0x4E01, 0x4D81, 0x4D01, 0x4C81,
0x0482, 0x0402, 0x0382, 0x0302, 0x0282, 0x0183, 0x0103, 0x0084, 0x000C,
0x0085, 0x0B81, 0x0C01, 0x4E81, 0x4F01, 0x4F81, 0x5001, 0x0086, 0x0104,
0x0203, 0x0283, 0x0303, 0x0502, 0x0C81, 0x0D01, 0x5081, 0x5101, 0x5181,
0x5201, 0x5281, 0x5301, 0x5381, 0x5401, 0x0000, 0x0009, 0x0008, 0x4C01,
0x4B81, 0x4B01, 0x4A81, 0x4A01, 0x4981, 0x4901, 0x4881, 0x4002, 0x0B01,
0x0A81, 0x0A01, 0x0981, 0x0901, 0x0881, 0x0801, 0x0781, 0x0202, 0x0182,
0x0007, 0x0006, 0x4801, 0x4781, 0x4701, 0x4681, 0x4601, 0x4581, 0x4501,
0x4481, 0x0701, 0x0681, 0x0102, 0x0083, 0x0005, 0x4401, 0x4381, 0x4301,
0x4281, 0x0601, 0x0581, 0x0501, 0x0004, 0x4201, 0x4181, 0x4101, 0x4081,
0x0481, 0x0401, 0x0381, 0x0301, 0x0082, 0x0003, 0x0281, 0x0201, 0x0181,
0x4001, 0x0001, 0x0081, 0x0101, 0x0002,
};
static const uint8_t block_bits[] = {
7, 2, 4, 6, 7, 8, 9, 9, 10, 10, 11, 11, 11, 3, 6, 8, 10, 11, 12, 4, 8,
10, 12, 5, 9, 10, 5, 9, 12, 5, 10, 12, 6, 10, 12, 6, 10, 6, 10, 6,
10, 7, 12, 7, 7, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 11, 11, 12, 12, 4, 9,
11, 6, 11, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9,
9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12,
12, 12
};
static const uint8_t block_codes[] = {
3, 2, 15, 21, 23, 31, 37, 36, 33, 32, 7, 6, 32, 6, 20, 30, 15, 33, 80,
14, 29, 14, 81, 13, 35, 13, 12, 34, 82, 11, 12, 83, 19, 11, 84, 18,
10, 17, 9, 16, 8, 22, 85, 21, 20, 28, 27, 33, 32, 31, 30, 29, 28,
27, 26, 34, 35, 86, 87, 7, 25, 5, 15, 4, 14, 13, 12, 19, 18, 17, 16,
26, 25, 24, 23, 22, 21, 20, 19, 24, 23, 22, 21, 20, 19, 18, 17, 7,
6, 5, 4, 36, 37, 38, 39, 88, 89, 90, 91, 92, 93, 94, 95
-9, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11,
11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12,
12, 12, 12, 7, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 5, 5, 5, 4, 2, 3, 4, 4,
};
static VLC cbplo_tab;
@ -490,18 +474,20 @@ static int decode_frame(AVCodecContext *avctx, void *data,
static av_cold void imm4_init_static_data(void)
{
INIT_VLC_SPARSE_STATIC(&cbplo_tab, CBPLO_VLC_BITS, FF_ARRAY_ELEMS(cbplo_bits),
cbplo_bits, 1, 1, cbplo_codes, 1, 1, cbplo_symbols, 1, 1,
1 << CBPLO_VLC_BITS);
INIT_VLC_STATIC_FROM_LENGTHS(&cbplo_tab, CBPLO_VLC_BITS, FF_ARRAY_ELEMS(cbplo),
&cbplo[0][1], 2, &cbplo[0][0], 2, 1,
0, 0, 1 << CBPLO_VLC_BITS);
INIT_VLC_SPARSE_STATIC(&cbphi_tab, 6, FF_ARRAY_ELEMS(cbphi_bits),
cbphi_bits, 1, 1, cbphi_codes, 1, 1, NULL, 0, 0, 64);
INIT_VLC_SPARSE_STATIC(&blktype_tab, 9, FF_ARRAY_ELEMS(blktype_bits),
blktype_bits, 1, 1, blktype_codes, 1, 1, blktype_symbols, 1, 1, 512);
INIT_VLC_STATIC_FROM_LENGTHS(&blktype_tab, BLKTYPE_VLC_BITS, FF_ARRAY_ELEMS(blktype),
&blktype[0][1], 2, &blktype[0][0], 2, 1,
0, 0, 1 << BLKTYPE_VLC_BITS);
INIT_VLC_SPARSE_STATIC(&block_tab, 12, FF_ARRAY_ELEMS(block_bits),
block_bits, 1, 1, block_codes, 1, 1, block_symbols, 2, 2, 4096);
INIT_VLC_STATIC_FROM_LENGTHS(&block_tab, BLOCK_VLC_BITS, FF_ARRAY_ELEMS(block_bits),
block_bits, 1, block_symbols, 2, 2,
0, 0, 1 << BLOCK_VLC_BITS);
}
static av_cold int decode_init(AVCodecContext *avctx)