/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include "vp8/common/type_aliases.h" #include "vp8/common/blockd.h" #include "onyxd_int.h" #include "vpx_mem/vpx_mem.h" #include "vpx_ports/mem.h" #include "detokenize.h" #include "vp8/common/seg_common.h" #define BOOL_DATA UINT8 #define OCB_X PREV_COEF_CONTEXTS * ENTROPY_NODES DECLARE_ALIGNED(16, static const unsigned char, coef_bands_x[16]) = { 0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X, 6 * OCB_X, 4 * OCB_X, 5 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 7 * OCB_X }; #if CONFIG_T8X8 DECLARE_ALIGNED(64, static const unsigned char, coef_bands_x_8x8[64]) = { 0 * OCB_X, 1 * OCB_X, 2 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 4 * OCB_X, 5 * OCB_X, 5 * OCB_X, 3 * OCB_X, 6 * OCB_X, 3 * OCB_X, 5 * OCB_X, 4 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 5 * OCB_X, 5 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 6 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, 7 * OCB_X, }; #endif #define EOB_CONTEXT_NODE 0 #define ZERO_CONTEXT_NODE 1 #define ONE_CONTEXT_NODE 2 #define LOW_VAL_CONTEXT_NODE 3 #define TWO_CONTEXT_NODE 4 #define THREE_CONTEXT_NODE 5 #define HIGH_LOW_CONTEXT_NODE 6 #define CAT_ONE_CONTEXT_NODE 7 #define CAT_THREEFOUR_CONTEXT_NODE 8 #define CAT_THREE_CONTEXT_NODE 9 #define CAT_FIVE_CONTEXT_NODE 10 #define CAT1_MIN_VAL 5 #define CAT2_MIN_VAL 7 #define CAT3_MIN_VAL 11 #define CAT4_MIN_VAL 19 #define CAT5_MIN_VAL 35 #define CAT6_MIN_VAL 67 #define CAT1_PROB0 159 #define CAT2_PROB0 145 #define CAT2_PROB1 165 #define CAT3_PROB0 140 #define CAT3_PROB1 148 #define CAT3_PROB2 173 #define CAT4_PROB0 135 #define CAT4_PROB1 140 #define CAT4_PROB2 155 #define CAT4_PROB3 176 #define CAT5_PROB0 130 #define CAT5_PROB1 134 #define CAT5_PROB2 141 #define CAT5_PROB3 157 #define CAT5_PROB4 180 static const unsigned char cat6_prob[14] = { 129, 130, 133, 140, 153, 177, 196, 230, 243, 249, 252, 254, 254, 0 }; void vp8_reset_mb_tokens_context(MACROBLOCKD *x) { /* Clear entropy contexts for Y2 blocks */ if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != I8X8_PRED && x->mode_info_context->mbmi.mode != SPLITMV) { vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)); vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)); } else { vpx_memset(x->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); vpx_memset(x->left_context, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); } } DECLARE_ALIGNED(16, extern const unsigned char, vp8_norm[256]); #define FILL \ if(count < 0) \ VP8DX_BOOL_DECODER_FILL(count, value, bufptr, bufend); #define NORMALIZE \ /*if(range < 0x80)*/ \ { \ shift = vp8_norm[range]; \ range <<= shift; \ value <<= shift; \ count -= shift; \ } #define DECODE_AND_APPLYSIGN(value_to_sign) \ split = (range + 1) >> 1; \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if ( value < bigsplit ) \ { \ range = split; \ v= value_to_sign; \ } \ else \ { \ range = range-split; \ value = value-bigsplit; \ v = -value_to_sign; \ } \ range +=range; \ value +=value; \ count--; #define DECODE_AND_BRANCH_IF_ZERO(probability,branch) \ { \ split = 1 + ((( probability*(range-1) ) )>> 8); \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if ( value < bigsplit ) \ { \ range = split; \ NORMALIZE \ goto branch; \ } \ value -= bigsplit; \ range = range - split; \ NORMALIZE \ } #define DECODE_AND_LOOP_IF_ZERO(probability,branch) \ { \ split = 1 + ((( probability*(range-1) ) ) >> 8); \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if ( value < bigsplit ) \ { \ range = split; \ NORMALIZE \ Prob = coef_probs; \ if(c<15) {\ ++c; \ Prob += coef_bands_x[c]; \ goto branch; \ } goto BLOCK_FINISHED; /*for malformed input */\ } \ value -= bigsplit; \ range = range - split; \ NORMALIZE \ } #if CONFIG_T8X8 #define DECODE_AND_LOOP_IF_ZERO_8x8_2(probability,branch) \ { \ split = 1 + ((( probability*(range-1) ) ) >> 8); \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if ( value < bigsplit ) \ { \ range = split; \ NORMALIZE \ Prob = coef_probs; \ if(c<3) {\ ++c; \ Prob += coef_bands_x[c]; \ goto branch; \ } goto BLOCK_FINISHED_8x8; /*for malformed input */\ } \ value -= bigsplit; \ range = range - split; \ NORMALIZE \ } #define DECODE_AND_LOOP_IF_ZERO_8X8(probability,branch) \ { \ split = 1 + ((( probability*(range-1) ) ) >> 8); \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if ( value < bigsplit ) \ { \ range = split; \ NORMALIZE \ Prob = coef_probs; \ if(c<63) {\ ++c; \ Prob += coef_bands_x_8x8[c]; \ goto branch; \ } goto BLOCK_FINISHED_8x8; /*for malformed input */\ } \ value -= bigsplit; \ range = range - split; \ NORMALIZE \ } #endif #define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val) \ DECODE_AND_APPLYSIGN(val) \ Prob = coef_probs + (ENTROPY_NODES*2); \ if(c < 15){\ qcoeff_ptr [ scan[c] ] = (INT16) v; \ ++c; \ goto DO_WHILE; }\ qcoeff_ptr [ 15 ] = (INT16) v; \ goto BLOCK_FINISHED; #if CONFIG_T8X8 #define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val) \ DECODE_AND_APPLYSIGN(val) \ Prob = coef_probs + (ENTROPY_NODES*2); \ if(c < 3){\ qcoeff_ptr [ scan[c] ] = (INT16) v; \ ++c; \ goto DO_WHILE_8x8; }\ qcoeff_ptr [ scan[3] ] = (INT16) v; \ goto BLOCK_FINISHED_8x8; #define DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val) \ DECODE_AND_APPLYSIGN(val) \ Prob = coef_probs + (ENTROPY_NODES*2); \ if(c < 63){\ qcoeff_ptr [ scan[c] ] = (INT16) v; \ ++c; \ goto DO_WHILE_8x8; }\ qcoeff_ptr [ scan[63] ] = (INT16) v; \ goto BLOCK_FINISHED_8x8; #endif #define DECODE_EXTRABIT_AND_ADJUST_VAL(prob, bits_count)\ split = 1 + (((range-1) * prob) >> 8); \ bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); \ FILL \ if(value >= bigsplit)\ {\ range = range-split;\ value = value-bigsplit;\ val += ((UINT16)1<above_context; ENTROPY_CONTEXT *L = (ENTROPY_CONTEXT *)x->left_context; const VP8_COMMON *const oc = & dx->common; BOOL_DECODER *bc = x->current_bc; char *eobs = x->eobs; ENTROPY_CONTEXT *a, *a1; ENTROPY_CONTEXT *l, *l1; int i; int eobtotal = 0; register int count; const BOOL_DATA *bufptr; const BOOL_DATA *bufend; register unsigned int range; VP8_BD_VALUE value; const int *scan;// register unsigned int shift; UINT32 split; VP8_BD_VALUE bigsplit; INT16 *qcoeff_ptr; const vp8_prob *coef_probs;// int type; int stop; INT16 val, bits_count; INT16 c; INT16 v; const vp8_prob *Prob;// int seg_eob; int segment_id = x->mode_info_context->mbmi.segment_id; type = 3; i = 0; stop = 16; scan = vp8_default_zig_zag1d_8x8; qcoeff_ptr = &x->qcoeff[0]; if (x->mode_info_context->mbmi.mode != B_PRED && x->mode_info_context->mbmi.mode != SPLITMV) { i = 24; stop = 24; type = 1; qcoeff_ptr += 24*16; eobtotal -= 4; scan = vp8_default_zig_zag1d; } bufend = bc->user_buffer_end; bufptr = bc->user_buffer; value = bc->value; count = bc->count; range = bc->range; coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0]; BLOCK_LOOP_8x8: a = A + vp8_block2above_8x8[i]; l = L + vp8_block2left_8x8[i]; c = (INT16)(!type); // Dest = ((A)!=0) + ((B)!=0); if(i==24) { VP8_COMBINEENTROPYCONTEXTS(v, *a, *l); if ( segfeature_active( x, segment_id, SEG_LVL_EOB ) ) { seg_eob = get_segdata( x, segment_id, SEG_LVL_EOB ); } else seg_eob = 4; } else { VP8_COMBINEENTROPYCONTEXTS(v, *a, *l); if ( segfeature_active( x, segment_id, SEG_LVL_EOB ) ) { seg_eob = get_segdata( x, segment_id, SEG_LVL_EOB ); } else seg_eob = 64; } Prob = coef_probs; Prob += v * ENTROPY_NODES; DO_WHILE_8x8: if ( c == seg_eob ) goto BLOCK_FINISHED_8x8; if(i==24) Prob += coef_bands_x[c]; else Prob += coef_bands_x_8x8[c]; DECODE_AND_BRANCH_IF_ZERO(Prob[EOB_CONTEXT_NODE], BLOCK_FINISHED_8x8); CHECK_0_8x8_: if (i==24) { DECODE_AND_LOOP_IF_ZERO_8x8_2(Prob[ZERO_CONTEXT_NODE], CHECK_0_8x8_); } else { DECODE_AND_LOOP_IF_ZERO_8X8(Prob[ZERO_CONTEXT_NODE], CHECK_0_8x8_); } DECODE_AND_BRANCH_IF_ZERO(Prob[ONE_CONTEXT_NODE], ONE_CONTEXT_NODE_0_8x8_); DECODE_AND_BRANCH_IF_ZERO(Prob[LOW_VAL_CONTEXT_NODE], LOW_VAL_CONTEXT_NODE_0_8x8_); DECODE_AND_BRANCH_IF_ZERO(Prob[HIGH_LOW_CONTEXT_NODE], HIGH_LOW_CONTEXT_NODE_0_8x8_); DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREEFOUR_CONTEXT_NODE], CAT_THREEFOUR_CONTEXT_NODE_0_8x8_); DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_FIVE_CONTEXT_NODE], CAT_FIVE_CONTEXT_NODE_0_8x8_); val = CAT6_MIN_VAL; bits_count = 12; do { DECODE_EXTRABIT_AND_ADJUST_VAL(cat6_prob[bits_count], bits_count); bits_count -- ; } while (bits_count >= 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } CAT_FIVE_CONTEXT_NODE_0_8x8_: val = CAT5_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB4, 4); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB3, 3); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB0, 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } CAT_THREEFOUR_CONTEXT_NODE_0_8x8_: DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREE_CONTEXT_NODE], CAT_THREE_CONTEXT_NODE_0_8x8_); val = CAT4_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB3, 3); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB0, 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } CAT_THREE_CONTEXT_NODE_0_8x8_: val = CAT3_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB0, 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } HIGH_LOW_CONTEXT_NODE_0_8x8_: DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_ONE_CONTEXT_NODE], CAT_ONE_CONTEXT_NODE_0_8x8_); val = CAT2_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB0, 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } CAT_ONE_CONTEXT_NODE_0_8x8_: val = CAT1_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT1_PROB0, 0); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(val); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(val); } LOW_VAL_CONTEXT_NODE_0_8x8_: DECODE_AND_BRANCH_IF_ZERO(Prob[TWO_CONTEXT_NODE], TWO_CONTEXT_NODE_0_8x8_); DECODE_AND_BRANCH_IF_ZERO(Prob[THREE_CONTEXT_NODE], THREE_CONTEXT_NODE_0_8x8_); if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(4); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(4); } THREE_CONTEXT_NODE_0_8x8_: if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(3); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(3); } TWO_CONTEXT_NODE_0_8x8_: if(i==24) { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8_2(2); } else { DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT_8x8(2); } ONE_CONTEXT_NODE_0_8x8_: DECODE_AND_APPLYSIGN(1); Prob = coef_probs + ENTROPY_NODES; if (i==24) { if (c < 3)//15 { qcoeff_ptr [ scan[c] ] = (INT16) v; ++c; goto DO_WHILE_8x8; } } else { if (c < 63) { qcoeff_ptr [ scan[c] ] = (INT16) v; ++c; goto DO_WHILE_8x8; } } if(i==24) qcoeff_ptr [ scan[3] ] = (INT16) v;//15 else qcoeff_ptr [ scan[63] ] = (INT16) v; BLOCK_FINISHED_8x8: *a = *l = ((eobs[i] = c) != !type); // any nonzero data? if (i!=24) { *(a + 1) = *a; *(l + 1) = *l; } eobtotal += c; qcoeff_ptr += (i==24 ? 16 : 64); i+=4; if (i < stop) goto BLOCK_LOOP_8x8; if (i > 24) { type = 0; i = 0; stop = 16; coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0]; qcoeff_ptr -= (24*16 + 16); scan = vp8_default_zig_zag1d_8x8; goto BLOCK_LOOP_8x8; } if (i == 16) { type = 2; coef_probs = oc->fc.coef_probs_8x8 [type] [ 0 ] [0]; stop = 24; goto BLOCK_LOOP_8x8; } FILL bc->user_buffer = bufptr; bc->value = value; bc->count = count; bc->range = range; return eobtotal; } #endif int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *xd) { ENTROPY_CONTEXT *A = (ENTROPY_CONTEXT *)xd->above_context; ENTROPY_CONTEXT *L = (ENTROPY_CONTEXT *)xd->left_context; const FRAME_CONTEXT * const fc = &dx->common.fc; BOOL_DECODER *bc = xd->current_bc; char *eobs = xd->eobs; ENTROPY_CONTEXT *a; ENTROPY_CONTEXT *l; int i; int eobtotal = 0; register int count; const BOOL_DATA *bufptr; const BOOL_DATA *bufend; register unsigned int range; VP8_BD_VALUE value; const int *scan; register unsigned int shift; UINT32 split; VP8_BD_VALUE bigsplit; INT16 *qcoeff_ptr; const vp8_prob *coef_probs; int type; int stop; INT16 val, bits_count; INT16 c; INT16 v; const vp8_prob *Prob; int seg_eob = 16; int segment_id = xd->mode_info_context->mbmi.segment_id; if ( segfeature_active( xd, segment_id, SEG_LVL_EOB ) ) { seg_eob = get_segdata( xd, segment_id, SEG_LVL_EOB ); } type = 3; i = 0; stop = 16; scan = vp8_default_zig_zag1d; qcoeff_ptr = &xd->qcoeff[0]; if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != I8X8_PRED && xd->mode_info_context->mbmi.mode != SPLITMV) { i = 24; stop = 24; type = 1; qcoeff_ptr += 24*16; eobtotal -= 16; } bufend = bc->user_buffer_end; bufptr = bc->user_buffer; value = bc->value; count = bc->count; range = bc->range; coef_probs = fc->coef_probs [type] [ 0 ] [0]; BLOCK_LOOP: a = A + vp8_block2above[i]; l = L + vp8_block2left[i]; c = (INT16)(!type); /*Dest = ((A)!=0) + ((B)!=0);*/ VP8_COMBINEENTROPYCONTEXTS(v, *a, *l); Prob = coef_probs; Prob += v * ENTROPY_NODES; DO_WHILE: if ( c == seg_eob ) goto BLOCK_FINISHED; Prob += coef_bands_x[c]; DECODE_AND_BRANCH_IF_ZERO(Prob[EOB_CONTEXT_NODE], BLOCK_FINISHED); CHECK_0_: DECODE_AND_LOOP_IF_ZERO(Prob[ZERO_CONTEXT_NODE], CHECK_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[ONE_CONTEXT_NODE], ONE_CONTEXT_NODE_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[LOW_VAL_CONTEXT_NODE], LOW_VAL_CONTEXT_NODE_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[HIGH_LOW_CONTEXT_NODE], HIGH_LOW_CONTEXT_NODE_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREEFOUR_CONTEXT_NODE], CAT_THREEFOUR_CONTEXT_NODE_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_FIVE_CONTEXT_NODE], CAT_FIVE_CONTEXT_NODE_0_); val = CAT6_MIN_VAL; bits_count = 12; do { DECODE_EXTRABIT_AND_ADJUST_VAL(cat6_prob[bits_count], bits_count); bits_count -- ; } while (bits_count >= 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); CAT_FIVE_CONTEXT_NODE_0_: val = CAT5_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB4, 4); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB3, 3); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT5_PROB0, 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); CAT_THREEFOUR_CONTEXT_NODE_0_: DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_THREE_CONTEXT_NODE], CAT_THREE_CONTEXT_NODE_0_); val = CAT4_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB3, 3); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT4_PROB0, 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); CAT_THREE_CONTEXT_NODE_0_: val = CAT3_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB2, 2); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT3_PROB0, 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); HIGH_LOW_CONTEXT_NODE_0_: DECODE_AND_BRANCH_IF_ZERO(Prob[CAT_ONE_CONTEXT_NODE], CAT_ONE_CONTEXT_NODE_0_); val = CAT2_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB1, 1); DECODE_EXTRABIT_AND_ADJUST_VAL(CAT2_PROB0, 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); CAT_ONE_CONTEXT_NODE_0_: val = CAT1_MIN_VAL; DECODE_EXTRABIT_AND_ADJUST_VAL(CAT1_PROB0, 0); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(val); LOW_VAL_CONTEXT_NODE_0_: DECODE_AND_BRANCH_IF_ZERO(Prob[TWO_CONTEXT_NODE], TWO_CONTEXT_NODE_0_); DECODE_AND_BRANCH_IF_ZERO(Prob[THREE_CONTEXT_NODE], THREE_CONTEXT_NODE_0_); DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(4); THREE_CONTEXT_NODE_0_: DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(3); TWO_CONTEXT_NODE_0_: DECODE_SIGN_WRITE_COEFF_AND_CHECK_EXIT(2); ONE_CONTEXT_NODE_0_: DECODE_AND_APPLYSIGN(1); Prob = coef_probs + ENTROPY_NODES; if (c < 15) { qcoeff_ptr [ scan[c] ] = (INT16) v; ++c; goto DO_WHILE; } qcoeff_ptr [ 15 ] = (INT16) v; BLOCK_FINISHED: *a = *l = ((eobs[i] = c) != !type); /* any nonzero data? */ eobtotal += c; qcoeff_ptr += 16; i++; if (i < stop) goto BLOCK_LOOP; if (i == 25) { type = 0; i = 0; stop = 16; coef_probs = fc->coef_probs [type] [ 0 ] [0]; qcoeff_ptr -= (24*16 + 16); goto BLOCK_LOOP; } if (i == 16) { type = 2; coef_probs = fc->coef_probs [type] [ 0 ] [0]; stop = 24; goto BLOCK_LOOP; } FILL bc->user_buffer = bufptr; bc->value = value; bc->count = count; bc->range = range; return eobtotal; }