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Diffstat (limited to 'contrib/ffmpeg/libavcodec/cabac.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/cabac.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/contrib/ffmpeg/libavcodec/cabac.c b/contrib/ffmpeg/libavcodec/cabac.c deleted file mode 100644 index c6da6292a..000000000 --- a/contrib/ffmpeg/libavcodec/cabac.c +++ /dev/null @@ -1,265 +0,0 @@ -/* - * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder - * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -/** - * @file cabac.c - * Context Adaptive Binary Arithmetic Coder. - */ - -#include <string.h> - -#include "common.h" -#include "bitstream.h" -#include "cabac.h" - -static const uint8_t lps_range[64][4]= { -{128,176,208,240}, {128,167,197,227}, {128,158,187,216}, {123,150,178,205}, -{116,142,169,195}, {111,135,160,185}, {105,128,152,175}, {100,122,144,166}, -{ 95,116,137,158}, { 90,110,130,150}, { 85,104,123,142}, { 81, 99,117,135}, -{ 77, 94,111,128}, { 73, 89,105,122}, { 69, 85,100,116}, { 66, 80, 95,110}, -{ 62, 76, 90,104}, { 59, 72, 86, 99}, { 56, 69, 81, 94}, { 53, 65, 77, 89}, -{ 51, 62, 73, 85}, { 48, 59, 69, 80}, { 46, 56, 66, 76}, { 43, 53, 63, 72}, -{ 41, 50, 59, 69}, { 39, 48, 56, 65}, { 37, 45, 54, 62}, { 35, 43, 51, 59}, -{ 33, 41, 48, 56}, { 32, 39, 46, 53}, { 30, 37, 43, 50}, { 29, 35, 41, 48}, -{ 27, 33, 39, 45}, { 26, 31, 37, 43}, { 24, 30, 35, 41}, { 23, 28, 33, 39}, -{ 22, 27, 32, 37}, { 21, 26, 30, 35}, { 20, 24, 29, 33}, { 19, 23, 27, 31}, -{ 18, 22, 26, 30}, { 17, 21, 25, 28}, { 16, 20, 23, 27}, { 15, 19, 22, 25}, -{ 14, 18, 21, 24}, { 14, 17, 20, 23}, { 13, 16, 19, 22}, { 12, 15, 18, 21}, -{ 12, 14, 17, 20}, { 11, 14, 16, 19}, { 11, 13, 15, 18}, { 10, 12, 15, 17}, -{ 10, 12, 14, 16}, { 9, 11, 13, 15}, { 9, 11, 12, 14}, { 8, 10, 12, 14}, -{ 8, 9, 11, 13}, { 7, 9, 11, 12}, { 7, 9, 10, 12}, { 7, 8, 10, 11}, -{ 6, 8, 9, 11}, { 6, 7, 9, 10}, { 6, 7, 8, 9}, { 2, 2, 2, 2}, -}; - -uint8_t ff_h264_mlps_state[4*64]; -uint8_t ff_h264_lps_range[4*2*64]; -uint8_t ff_h264_lps_state[2*64]; -uint8_t ff_h264_mps_state[2*64]; - -static const uint8_t mps_state[64]= { - 1, 2, 3, 4, 5, 6, 7, 8, - 9,10,11,12,13,14,15,16, - 17,18,19,20,21,22,23,24, - 25,26,27,28,29,30,31,32, - 33,34,35,36,37,38,39,40, - 41,42,43,44,45,46,47,48, - 49,50,51,52,53,54,55,56, - 57,58,59,60,61,62,62,63, -}; - -static const uint8_t lps_state[64]= { - 0, 0, 1, 2, 2, 4, 4, 5, - 6, 7, 8, 9, 9,11,11,12, - 13,13,15,15,16,16,18,18, - 19,19,21,21,22,22,23,24, - 24,25,26,26,27,27,28,29, - 29,30,30,30,31,32,32,33, - 33,33,34,34,35,35,35,36, - 36,36,37,37,37,38,38,63, -}; -#if 0 -const uint8_t ff_h264_norm_shift_old[128]= { - 7,6,5,5,4,4,4,4,3,3,3,3,3,3,3,3, - 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -}; -#endif -const uint8_t ff_h264_norm_shift[512]= { - 9,8,7,7,6,6,6,6,5,5,5,5,5,5,5,5, - 4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, - 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, - 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, - 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, - 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, - 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, - 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, - 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, -}; - -/** - * - * @param buf_size size of buf in bits - */ -void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size){ - init_put_bits(&c->pb, buf, buf_size); - - c->low= 0; - c->range= 0x1FE; - c->outstanding_count= 0; -#ifdef STRICT_LIMITS - c->sym_count =0; -#endif - - c->pb.bit_left++; //avoids firstBitFlag -} - -/** - * - * @param buf_size size of buf in bits - */ -void ff_init_cabac_decoder(CABACContext *c, const uint8_t *buf, int buf_size){ - c->bytestream_start= - c->bytestream= buf; - c->bytestream_end= buf + buf_size; - -#if CABAC_BITS == 16 - c->low = (*c->bytestream++)<<18; - c->low+= (*c->bytestream++)<<10; -#else - c->low = (*c->bytestream++)<<10; -#endif - c->low+= ((*c->bytestream++)<<2) + 2; - c->range= 0x1FE; -} - -void ff_init_cabac_states(CABACContext *c){ - int i, j; - - for(i=0; i<64; i++){ - for(j=0; j<4; j++){ //FIXME check if this is worth the 1 shift we save - ff_h264_lps_range[j*2*64+2*i+0]= - ff_h264_lps_range[j*2*64+2*i+1]= lps_range[i][j]; - } - - ff_h264_mlps_state[128+2*i+0]= - ff_h264_mps_state[2*i+0]= 2*mps_state[i]+0; - ff_h264_mlps_state[128+2*i+1]= - ff_h264_mps_state[2*i+1]= 2*mps_state[i]+1; - - if( i ){ -#ifdef BRANCHLESS_CABAC_DECODER - ff_h264_mlps_state[128-2*i-1]= 2*lps_state[i]+0; - ff_h264_mlps_state[128-2*i-2]= 2*lps_state[i]+1; - }else{ - ff_h264_mlps_state[128-2*i-1]= 1; - ff_h264_mlps_state[128-2*i-2]= 0; -#else - ff_h264_lps_state[2*i+0]= 2*lps_state[i]+0; - ff_h264_lps_state[2*i+1]= 2*lps_state[i]+1; - }else{ - ff_h264_lps_state[2*i+0]= 1; - ff_h264_lps_state[2*i+1]= 0; -#endif - } - } -} - -#if 0 //selftest -#define SIZE 10240 - -#include "avcodec.h" - -int main(){ - CABACContext c; - uint8_t b[9*SIZE]; - uint8_t r[9*SIZE]; - int i; - uint8_t state[10]= {0}; - - ff_init_cabac_encoder(&c, b, SIZE); - ff_init_cabac_states(&c, ff_h264_lps_range, ff_h264_mps_state, ff_h264_lps_state, 64); - - for(i=0; i<SIZE; i++){ - r[i]= random()%7; - } - - for(i=0; i<SIZE; i++){ -START_TIMER - put_cabac_bypass(&c, r[i]&1); -STOP_TIMER("put_cabac_bypass") - } - - for(i=0; i<SIZE; i++){ -START_TIMER - put_cabac(&c, state, r[i]&1); -STOP_TIMER("put_cabac") - } - - for(i=0; i<SIZE; i++){ -START_TIMER - put_cabac_u(&c, state, r[i], 6, 3, i&1); -STOP_TIMER("put_cabac_u") - } - - for(i=0; i<SIZE; i++){ -START_TIMER - put_cabac_ueg(&c, state, r[i], 3, 0, 1, 2); -STOP_TIMER("put_cabac_ueg") - } - - put_cabac_terminate(&c, 1); - - ff_init_cabac_decoder(&c, b, SIZE); - - memset(state, 0, sizeof(state)); - - for(i=0; i<SIZE; i++){ -START_TIMER - if( (r[i]&1) != get_cabac_bypass(&c) ) - av_log(NULL, AV_LOG_ERROR, "CABAC bypass failure at %d\n", i); -STOP_TIMER("get_cabac_bypass") - } - - for(i=0; i<SIZE; i++){ -START_TIMER - if( (r[i]&1) != get_cabac(&c, state) ) - av_log(NULL, AV_LOG_ERROR, "CABAC failure at %d\n", i); -STOP_TIMER("get_cabac") - } -#if 0 - for(i=0; i<SIZE; i++){ -START_TIMER - if( r[i] != get_cabac_u(&c, state, (i&1) ? 6 : 7, 3, i&1) ) - av_log(NULL, AV_LOG_ERROR, "CABAC unary (truncated) binarization failure at %d\n", i); -STOP_TIMER("get_cabac_u") - } - - for(i=0; i<SIZE; i++){ -START_TIMER - if( r[i] != get_cabac_ueg(&c, state, 3, 0, 1, 2)) - av_log(NULL, AV_LOG_ERROR, "CABAC unary (truncated) binarization failure at %d\n", i); -STOP_TIMER("get_cabac_ueg") - } -#endif - if(!get_cabac_terminate(&c)) - av_log(NULL, AV_LOG_ERROR, "where's the Terminator?\n"); - - return 0; -} - -#endif |