X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fcabac.h;fp=synfig-core%2Ftags%2Fsynfig_0_61_04%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fcabac.h;h=0000000000000000000000000000000000000000;hb=3a6643238c67c043fc3592837a05d6d2861967f1;hp=a49e15631609d28d320ab1253e98773a79660bcb;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/cabac.h b/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/cabac.h deleted file mode 100644 index a49e156..0000000 --- a/synfig-core/tags/synfig_0_61_04/synfig-core/src/modules/mod_libavcodec/libavcodec/cabac.h +++ /dev/null @@ -1,381 +0,0 @@ -/* - * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder - * Copyright (c) 2003 Michael Niedermayer - * - * This library 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 of the License, or (at your option) any later version. - * - * This library 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 this library; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -/** - * @file cabac.h - * Context Adaptive Binary Arithmetic Coder. - */ - - -#undef NDEBUG -#include - -typedef struct CABACContext{ - int low; - int range; - int outstanding_count; -#ifdef STRICT_LIMITS - int symCount; -#endif - uint8_t lps_range[2*64][4]; ///< rangeTabLPS - uint8_t lps_state[2*64]; ///< transIdxLPS - uint8_t mps_state[2*64]; ///< transIdxMPS - uint8_t *bytestream_start; - uint8_t *bytestream; - int bits_left; ///< - PutBitContext pb; -}CABACContext; - -extern const uint8_t ff_h264_lps_range[64][4]; -extern const uint8_t ff_h264_mps_state[64]; -extern const uint8_t ff_h264_lps_state[64]; - -void ff_init_cabac_encoder(CABACContext *c, uint8_t *buf, int buf_size); -void ff_init_cabac_decoder(CABACContext *c, uint8_t *buf, int buf_size); -void ff_init_cabac_states(CABACContext *c, uint8_t const (*lps_range)[4], - uint8_t const *mps_state, uint8_t const *lps_state, int state_count); - - -static inline void put_cabac_bit(CABACContext *c, int b){ - put_bits(&c->pb, 1, b); - for(;c->outstanding_count; c->outstanding_count--){ - put_bits(&c->pb, 1, 1-b); - } -} - -static inline void renorm_cabac_encoder(CABACContext *c){ - while(c->range < 0x100){ - //FIXME optimize - if(c->low<0x100){ - put_cabac_bit(c, 0); - }else if(c->low<0x200){ - c->outstanding_count++; - c->low -= 0x100; - }else{ - put_cabac_bit(c, 1); - c->low -= 0x200; - } - - c->range+= c->range; - c->low += c->low; - } -} - -static inline void put_cabac(CABACContext *c, uint8_t * const state, int bit){ - int RangeLPS= c->lps_range[*state][((c->range)>>6)&3]; - - if(bit == ((*state)&1)){ - c->range -= RangeLPS; - *state= c->mps_state[*state]; - }else{ - c->low += c->range - RangeLPS; - c->range = RangeLPS; - *state= c->lps_state[*state]; - } - - renorm_cabac_encoder(c); - -#ifdef STRICT_LIMITS - c->symCount++; -#endif -} - -static inline void put_cabac_static(CABACContext *c, int RangeLPS, int bit){ - assert(c->range > RangeLPS); - - if(!bit){ - c->range -= RangeLPS; - }else{ - c->low += c->range - RangeLPS; - c->range = RangeLPS; - } - - renorm_cabac_encoder(c); - -#ifdef STRICT_LIMITS - c->symCount++; -#endif -} - -/** - * @param bit 0 -> write zero bit, !=0 write one bit - */ -static inline void put_cabac_bypass(CABACContext *c, int bit){ - c->low += c->low; - - if(bit){ - c->low += c->range; - } -//FIXME optimize - if(c->low<0x200){ - put_cabac_bit(c, 0); - }else if(c->low<0x400){ - c->outstanding_count++; - c->low -= 0x200; - }else{ - put_cabac_bit(c, 1); - c->low -= 0x400; - } - -#ifdef STRICT_LIMITS - c->symCount++; -#endif -} - -/** - * - * @return the number of bytes written - */ -static inline int put_cabac_terminate(CABACContext *c, int bit){ - c->range -= 2; - - if(!bit){ - renorm_cabac_encoder(c); - }else{ - c->low += c->range; - c->range= 2; - - renorm_cabac_encoder(c); - - assert(c->low <= 0x1FF); - put_cabac_bit(c, c->low>>9); - put_bits(&c->pb, 2, ((c->low>>7)&3)|1); - - flush_put_bits(&c->pb); //FIXME FIXME FIXME XXX wrong - } - -#ifdef STRICT_LIMITS - c->symCount++; -#endif - - return (get_bit_count(&c->pb)+7)>>3; -} - -/** - * put (truncated) unary binarization. - */ -static inline void put_cabac_u(CABACContext *c, uint8_t * state, int v, int max, int max_index, int truncated){ - int i; - - assert(v <= max); - -#if 1 - for(i=0; i= m){ //FIXME optimize - put_cabac_bypass(c, 1); - v-= m; - m+= m; - } - put_cabac_bypass(c, 0); - while(m>>=1){ - put_cabac_bypass(c, v&m); - } - } - - if(is_signed) - put_cabac_bypass(c, sign); - } -} - -static inline void renorm_cabac_decoder(CABACContext *c){ - while(c->range < 0x10000){ - c->range+= c->range; - c->low+= c->low; - if(--c->bits_left == 0){ - c->low+= *c->bytestream++; - c->bits_left= 8; - } - } -} - -static inline int get_cabac(CABACContext *c, uint8_t * const state){ - int RangeLPS= c->lps_range[*state][((c->range)>>14)&3]<<8; - int bit; - - c->range -= RangeLPS; - if(c->low < c->range){ - bit= (*state)&1; - *state= c->mps_state[*state]; - }else{ - bit= ((*state)&1)^1; - c->low -= c->range; - c->range = RangeLPS; - *state= c->lps_state[*state]; - } - renorm_cabac_decoder(c); - - return bit; -} - -static inline int get_cabac_static(CABACContext *c, int RangeLPS){ - int bit; - - c->range -= RangeLPS; - if(c->low < c->range){ - bit= 0; - }else{ - bit= 1; - c->low -= c->range; - c->range = RangeLPS; - } - renorm_cabac_decoder(c); - - return bit; -} - -static inline int get_cabac_bypass(CABACContext *c){ - c->low += c->low; - - if(--c->bits_left == 0){ - c->low+= *c->bytestream++; - c->bits_left= 8; - } - - if(c->low < c->range){ - return 0; - }else{ - c->low -= c->range; - return 1; - } -} - -/** - * - * @return the number of bytes read or 0 if no end - */ -static inline int get_cabac_terminate(CABACContext *c){ - c->range -= 2<<8; - if(c->low < c->range){ - renorm_cabac_decoder(c); - return 0; - }else{ - return c->bytestream - c->bytestream_start; - } -} - -/** - * get (truncated) unnary binarization. - */ -static inline int get_cabac_u(CABACContext *c, uint8_t * state, int max, int max_index, int truncated){ - int i; - - for(i=0; i>=1){ - v+= v + get_cabac_bypass(c); - } - i += v; - - if(is_signed && get_cabac_bypass(c)){ - return -i; - }else - return i; -}