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Commit ced1de78 authored by michael's avatar michael
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Documentation patch by anonymous 


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@3914 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b
parent 3da72429
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Showing with 432 additions and 220 deletions
libavcodec/vc9.c
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libavcodec/vc9data.h
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......@@ -7,7 +7,7 @@
#define VC9DATA_H
/* Set a method for reading VLC in NORM6 bitplane decoding */
#define TILE_VLC_METHOD 1
#define VLC_NORM6_METH0D 1
/* bfraction is fractional, we scale to the GCD 3*5*7*8 = 840 */
const int16_t vc9_bfraction_lut[23] = {
......@@ -74,7 +74,7 @@ static const uint8_t vc9_norm2_bits[4] = {
1, 3, 3, 2
};
#if TILE_VLC_METHOD == 1
#if VLC_NORM6_METH0D == 1
static const uint16_t vc9_norm6_codes[64] = {
0x001, 0x002, 0x003, 0x000, 0x004, 0x001, 0x002, 0x047, 0x005, 0x003, 0x004, 0x04B, 0x005, 0x04D, 0x04E, 0x30E,
0x006, 0x006, 0x007, 0x053, 0x008, 0x055, 0x056, 0x30D, 0x009, 0x059, 0x05A, 0x30C, 0x05C, 0x30B, 0x30A, 0x037,
......@@ -157,34 +157,19 @@ static const uint8_t vc9_norm6_spec[64][5] = {
};
#endif
#if TILE_VLC_METHOD == 2 //Hyper-stupid way to handle sparse tables
static const uint8_t vc9_norm6_first[2][64] = {
//Mechanical way, handling sparse/incomplete tables
#if VLC_NORM6_METH0D == 2
//(2,5) is VLC+FLC, (3,5) double VLC
static const uint8_t vc9_norm6_first[24][2] = {
{ 1, 1}, { 2, 4}, { 3, 4}, { 0, 8},
{ 4, 4}, { 5, 1}, { 2, 8}, { 2, 5},
{ 5, 4}, { 3, 8}, { 4, 8}, { 2, 5},
{ 5, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 6, 4}, { 6, 8}, { 7, 8}, { 2, 5},
{ 8, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 9, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 2, 5}, { 3, 5}, { 3, 5}, { 3, 5},
{ 7, 4}, { 10, 8}, { 11, 8}, { 2, 5},
{ 12, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 13, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 2, 5}, { 3, 5}, { 3, 5}, { 3, 5},
{ 14, 8}, { 2, 5}, { 2, 5}, { 3, 5},
{ 2, 5}, { 3, 5}, { 3, 5}, { 3, 5},
{ 2, 5}, { 3, 5}, { 3, 5}, { 3, 5},
{ 3, 5}, { 3, 5}, { 3, 5}, { 3, 5}
{ 4, 4}, { 1, 8}, { 2, 8}, { 5, 4},
{ 3, 8}, { 4, 8}, { 5, 8}, { 6, 4},
{ 6, 8}, { 7, 8}, { 8, 8}, { 9, 8},
{ 7, 4}, { 10, 8}, { 11, 8}, { 12, 8},
{ 13, 8}, { 14, 8}, { 2, 5}, { 3, 5}
};
/* 0=>simple VLC, 1=>VLCFLC, 2=>double VLC */
static const int vc9_norm6_mode[64] = {
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 2,
0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 2,
0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 2,
0, 1, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 2, 2, 2
};
static const uint8_t vc9_norm6_second[22] = {
static const uint8_t vc9_norm6_second[22][2] = {
{ 14, 8}, { 13, 8}, { 12, 8}, { 11, 8},
{ 10, 8}, { 7, 4}, { 9, 8}, { 8, 8},
{ 7, 8}, { 6, 8}, { 6, 4}, { 5, 8},
......
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