| /* |
| * 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 "onyxd_int.h" |
| #include "vp8/common/header.h" |
| #include "vp8/common/reconintra.h" |
| #include "vp8/common/reconintra4x4.h" |
| #include "vp8/common/recon.h" |
| #include "vp8/common/reconinter.h" |
| #include "dequantize.h" |
| #include "detokenize.h" |
| #include "vp8/common/invtrans.h" |
| #include "vp8/common/alloccommon.h" |
| #include "vp8/common/entropymode.h" |
| #include "vp8/common/quant_common.h" |
| #include "vpx_scale/vpxscale.h" |
| #include "vpx_scale/yv12extend.h" |
| #include "vp8/common/setupintrarecon.h" |
| |
| #include "decodemv.h" |
| #include "vp8/common/extend.h" |
| #include "vp8/common/modecont.h" |
| #include "vpx_mem/vpx_mem.h" |
| #include "vp8/common/idct.h" |
| #include "dequantize.h" |
| #include "dboolhuff.h" |
| |
| #include "vp8/common/seg_common.h" |
| #include "vp8/common/entropy.h" |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| |
| #ifdef DEC_DEBUG |
| int dec_debug = 0; |
| #endif |
| |
| #if CONFIG_NEWUPDATE |
| static int inv_remap_prob(int v, int m) |
| { |
| const int n = 256; |
| int i; |
| //if (v <= n - 2 - s) v += s; else v = n - 2 - v; |
| //v = ((v&240)>>4) | ((v&15)<<4); |
| v = (v%15)*17 + (v/15); |
| if ((m<<1)<=n) { |
| i = inv_recenter_nonneg(v+1, m); |
| } else { |
| i = n-1-inv_recenter_nonneg(v+1, n-1-m); |
| } |
| return i; |
| } |
| #endif |
| |
| void vp8cx_init_de_quantizer(VP8D_COMP *pbi) |
| { |
| int i; |
| int Q; |
| VP8_COMMON *const pc = & pbi->common; |
| |
| for (Q = 0; Q < QINDEX_RANGE; Q++) |
| { |
| pc->Y1dequant[Q][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q); |
| pc->Y2dequant[Q][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q); |
| pc->UVdequant[Q][0] = (short)vp8_dc_uv_quant(Q, pc->uvdc_delta_q); |
| |
| /* all the ac values = ; */ |
| for (i = 1; i < 16; i++) |
| { |
| int rc = vp8_default_zig_zag1d[i]; |
| |
| pc->Y1dequant[Q][rc] = (short)vp8_ac_yquant(Q); |
| pc->Y2dequant[Q][rc] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q); |
| pc->UVdequant[Q][rc] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q); |
| } |
| } |
| } |
| |
| void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd) |
| { |
| int i; |
| int QIndex; |
| VP8_COMMON *const pc = & pbi->common; |
| int segment_id = xd->mode_info_context->mbmi.segment_id; |
| |
| // Set the Q baseline allowing for any segment level adjustment |
| if ( segfeature_active( xd, segment_id, SEG_LVL_ALT_Q ) ) |
| { |
| /* Abs Value */ |
| if (xd->mb_segment_abs_delta == SEGMENT_ABSDATA) |
| QIndex = get_segdata( xd, segment_id, SEG_LVL_ALT_Q ); |
| |
| /* Delta Value */ |
| else |
| { |
| QIndex = pc->base_qindex + |
| get_segdata( xd, segment_id, SEG_LVL_ALT_Q ); |
| QIndex = (QIndex >= 0) ? ((QIndex <= MAXQ) ? QIndex : MAXQ) : 0; /* Clamp to valid range */ |
| } |
| } |
| else |
| QIndex = pc->base_qindex; |
| |
| /* Set up the block level dequant pointers */ |
| for (i = 0; i < 16; i++) |
| { |
| xd->block[i].dequant = pc->Y1dequant[QIndex]; |
| } |
| |
| for (i = 16; i < 24; i++) |
| { |
| xd->block[i].dequant = pc->UVdequant[QIndex]; |
| } |
| |
| xd->block[24].dequant = pc->Y2dequant[QIndex]; |
| |
| } |
| |
| #if CONFIG_RUNTIME_CPU_DETECT |
| #define RTCD_VTABLE(x) (&(pbi)->common.rtcd.x) |
| #else |
| #define RTCD_VTABLE(x) NULL |
| #endif |
| |
| /* skip_recon_mb() is Modified: Instead of writing the result to predictor buffer and then copying it |
| * to dst buffer, we can write the result directly to dst buffer. This eliminates unnecessary copy. |
| */ |
| static void skip_recon_mb(VP8D_COMP *pbi, MACROBLOCKD *xd) |
| { |
| if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) |
| { |
| RECON_INVOKE(&pbi->common.rtcd.recon, build_intra_predictors_mbuv_s)(xd); |
| RECON_INVOKE(&pbi->common.rtcd.recon, |
| build_intra_predictors_mby_s)(xd); |
| } |
| else |
| { |
| vp8_build_inter16x16_predictors_mb(xd, xd->dst.y_buffer, |
| xd->dst.u_buffer, xd->dst.v_buffer, |
| xd->dst.y_stride, xd->dst.uv_stride); |
| |
| if (xd->mode_info_context->mbmi.second_ref_frame) |
| { |
| vp8_build_2nd_inter16x16_predictors_mb(xd, xd->dst.y_buffer, |
| xd->dst.u_buffer, xd->dst.v_buffer, |
| xd->dst.y_stride, xd->dst.uv_stride); |
| } |
| } |
| #ifdef DEC_DEBUG |
| if (dec_debug) { |
| int i, j; |
| printf("Generating predictors\n"); |
| for (i=0;i<16;i++) { |
| for (j=0;j<16;j++) printf("%3d ", xd->dst.y_buffer[i*xd->dst.y_stride+j]); |
| printf("\n"); |
| } |
| } |
| #endif |
| |
| } |
| |
| extern const int vp8_i8x8_block[4]; |
| static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd, |
| unsigned int mb_idx) |
| { |
| int eobtotal = 0; |
| MB_PREDICTION_MODE mode; |
| int i; |
| int tx_type; |
| |
| if(pbi->common.frame_type == KEY_FRAME) |
| { |
| if( pbi->common.txfm_mode==ALLOW_8X8 && |
| (xd->mode_info_context->mbmi.mode == DC_PRED |
| ||xd->mode_info_context->mbmi.mode == TM_PRED)) |
| xd->mode_info_context->mbmi.txfm_size = TX_8X8; |
| else |
| xd->mode_info_context->mbmi.txfm_size = TX_4X4; |
| } |
| else |
| { |
| if( pbi->common.txfm_mode==ONLY_4X4 ) |
| { |
| xd->mode_info_context->mbmi.txfm_size = TX_4X4; |
| } |
| else if( pbi->common.txfm_mode == ALLOW_8X8 ) |
| { |
| if( xd->mode_info_context->mbmi.mode ==B_PRED |
| ||xd->mode_info_context->mbmi.mode ==I8X8_PRED |
| ||xd->mode_info_context->mbmi.mode ==SPLITMV) |
| xd->mode_info_context->mbmi.txfm_size = TX_4X4; |
| else |
| xd->mode_info_context->mbmi.txfm_size = TX_8X8; |
| } |
| } |
| tx_type = xd->mode_info_context->mbmi.txfm_size; |
| |
| if (xd->mode_info_context->mbmi.mb_skip_coeff) |
| { |
| vp8_reset_mb_tokens_context(xd); |
| } |
| else if (!vp8dx_bool_error(xd->current_bc)) |
| { |
| for(i = 0; i < 25; i++) |
| { |
| xd->block[i].eob = 0; |
| xd->eobs[i] = 0; |
| } |
| if ( tx_type == TX_8X8 ) |
| eobtotal = vp8_decode_mb_tokens_8x8(pbi, xd); |
| else |
| eobtotal = vp8_decode_mb_tokens(pbi, xd); |
| #ifdef DEC_DEBUG |
| if (dec_debug) { |
| printf("\nTokens (%d)\n", eobtotal); |
| for (i =0; i<400; i++) { |
| printf("%3d ", xd->qcoeff[i]); |
| if (i%16 == 15) printf("\n"); |
| } |
| printf("\n"); |
| } |
| #endif |
| } |
| |
| mode = xd->mode_info_context->mbmi.mode; |
| |
| if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV |
| && mode != I8X8_PRED |
| &&!vp8dx_bool_error(xd->current_bc) |
| ) |
| { |
| /* Special case: Force the loopfilter to skip when eobtotal and |
| * mb_skip_coeff are zero. |
| * */ |
| xd->mode_info_context->mbmi.mb_skip_coeff = 1; |
| |
| skip_recon_mb(pbi, xd); |
| return; |
| } |
| |
| #ifdef DEC_DEBUG |
| if (dec_debug) { |
| int i, j; |
| printf("Generating predictors\n"); |
| for (i=0;i<16;i++) { |
| for (j=0;j<16;j++) printf("%3d ", xd->dst.y_buffer[i*xd->dst.y_stride+j]); |
| printf("\n"); |
| } |
| } |
| #endif |
| |
| if (xd->segmentation_enabled) |
| mb_init_dequantizer(pbi, xd); |
| |
| /* do prediction */ |
| if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) |
| { |
| if(mode != I8X8_PRED) |
| { |
| RECON_INVOKE(&pbi->common.rtcd.recon, build_intra_predictors_mbuv)(xd); |
| if (mode != B_PRED) |
| { |
| RECON_INVOKE(&pbi->common.rtcd.recon, |
| build_intra_predictors_mby)(xd); |
| } |
| #if 0 |
| // Intra-modes requiring recon data from top-right |
| // MB have been temporarily disabled. |
| else |
| { |
| vp8_intra_prediction_down_copy(xd); |
| } |
| #endif |
| } |
| } |
| else |
| { |
| vp8_build_inter_predictors_mb(xd); |
| } |
| |
| /* dequantization and idct */ |
| if (mode == I8X8_PRED) |
| { |
| for (i = 0; i < 4; i++) |
| { |
| int ib = vp8_i8x8_block[i]; |
| const int iblock[4]={0,1,4,5}; |
| int j; |
| int i8x8mode; |
| BLOCKD *b; |
| |
| b = &xd->block[ib]; |
| i8x8mode= b->bmi.as_mode.first; |
| RECON_INVOKE(RTCD_VTABLE(recon), intra8x8_predict) |
| (b, i8x8mode, b->predictor); |
| |
| for(j = 0; j < 4; j++) |
| { |
| b = &xd->block[ib+iblock[j]]; |
| if (xd->eobs[ib+iblock[j]] > 1) |
| { |
| DEQUANT_INVOKE(&pbi->dequant, idct_add) |
| (b->qcoeff, b->dequant, b->predictor, |
| *(b->base_dst) + b->dst, 16, b->dst_stride); |
| } |
| else |
| { |
| IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar_add) |
| (b->qcoeff[0] * b->dequant[0], b->predictor, |
| *(b->base_dst) + b->dst, 16, b->dst_stride); |
| ((int *)b->qcoeff)[0] = 0; |
| } |
| } |
| |
| b = &xd->block[16+i]; |
| RECON_INVOKE(RTCD_VTABLE(recon), intra_uv4x4_predict) |
| (b, i8x8mode, b->predictor); |
| DEQUANT_INVOKE(&pbi->dequant, idct_add) |
| (b->qcoeff, b->dequant, b->predictor, |
| *(b->base_dst) + b->dst, 8, b->dst_stride); |
| b = &xd->block[20+i]; |
| RECON_INVOKE(RTCD_VTABLE(recon), intra_uv4x4_predict) |
| (b, i8x8mode, b->predictor); |
| DEQUANT_INVOKE(&pbi->dequant, idct_add) |
| (b->qcoeff, b->dequant, b->predictor, |
| *(b->base_dst) + b->dst, 8, b->dst_stride); |
| } |
| } |
| else if (mode == B_PRED) |
| { |
| for (i = 0; i < 16; i++) |
| { |
| BLOCKD *b = &xd->block[i]; |
| int b_mode = xd->mode_info_context->bmi[i].as_mode.first; |
| #if CONFIG_COMP_INTRA_PRED |
| int b_mode2 = xd->mode_info_context->bmi[i].as_mode.second; |
| |
| if (b_mode2 == (B_PREDICTION_MODE) (B_DC_PRED - 1)) |
| { |
| #endif |
| RECON_INVOKE(RTCD_VTABLE(recon), intra4x4_predict) |
| (b, b_mode, b->predictor); |
| #if CONFIG_COMP_INTRA_PRED |
| } |
| else |
| { |
| RECON_INVOKE(RTCD_VTABLE(recon), comp_intra4x4_predict) |
| (b, b_mode, b_mode2, b->predictor); |
| } |
| #endif |
| |
| if (xd->eobs[i] > 1) |
| { |
| DEQUANT_INVOKE(&pbi->dequant, idct_add) |
| (b->qcoeff, b->dequant, b->predictor, |
| *(b->base_dst) + b->dst, 16, b->dst_stride); |
| } |
| else |
| { |
| IDCT_INVOKE(RTCD_VTABLE(idct), idct1_scalar_add) |
| (b->qcoeff[0] * b->dequant[0], b->predictor, |
| *(b->base_dst) + b->dst, 16, b->dst_stride); |
| ((int *)b->qcoeff)[0] = 0; |
| } |
| } |
| } |
| else if (mode == SPLITMV) |
| { |
| DEQUANT_INVOKE (&pbi->dequant, idct_add_y_block) |
| (xd->qcoeff, xd->block[0].dequant, |
| xd->predictor, xd->dst.y_buffer, |
| xd->dst.y_stride, xd->eobs); |
| } |
| else |
| { |
| BLOCKD *b = &xd->block[24]; |
| |
| |
| if( tx_type == TX_8X8 ) |
| { |
| DEQUANT_INVOKE(&pbi->dequant, block_2x2)(b); |
| #ifdef DEC_DEBUG |
| if (dec_debug) |
| { |
| int j; |
| printf("DQcoeff Haar\n"); |
| for (j=0;j<16;j++) { |
| printf("%d ", b->dqcoeff[j]); |
| } |
| printf("\n"); |
| } |
| #endif |
| IDCT_INVOKE(RTCD_VTABLE(idct), ihaar2)(&b->dqcoeff[0], b->diff, 8); |
| ((int *)b->qcoeff)[0] = 0;//2nd order block are set to 0 after inverse transform |
| ((int *)b->qcoeff)[1] = 0; |
| ((int *)b->qcoeff)[2] = 0; |
| ((int *)b->qcoeff)[3] = 0; |
| ((int *)b->qcoeff)[4] = 0; |
| ((int *)b->qcoeff)[5] = 0; |
| ((int *)b->qcoeff)[6] = 0; |
| ((int *)b->qcoeff)[7] = 0; |
| DEQUANT_INVOKE (&pbi->dequant, dc_idct_add_y_block_8x8) |
| (xd->qcoeff, xd->block[0].dequant, |
| xd->predictor, xd->dst.y_buffer, |
| xd->dst.y_stride, xd->eobs, xd->block[24].diff, xd); |
| } |
| else |
| { |
| DEQUANT_INVOKE(&pbi->dequant, block)(b); |
| if (xd->eobs[24] > 1) |
| { |
| IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh16)(&b->dqcoeff[0], b->diff); |
| ((int *)b->qcoeff)[0] = 0; |
| ((int *)b->qcoeff)[1] = 0; |
| ((int *)b->qcoeff)[2] = 0; |
| ((int *)b->qcoeff)[3] = 0; |
| ((int *)b->qcoeff)[4] = 0; |
| ((int *)b->qcoeff)[5] = 0; |
| ((int *)b->qcoeff)[6] = 0; |
| ((int *)b->qcoeff)[7] = 0; |
| } |
| else |
| { |
| IDCT_INVOKE(RTCD_VTABLE(idct), iwalsh1)(&b->dqcoeff[0], b->diff); |
| ((int *)b->qcoeff)[0] = 0; |
| } |
| |
| DEQUANT_INVOKE (&pbi->dequant, dc_idct_add_y_block) |
| (xd->qcoeff, xd->block[0].dequant, |
| xd->predictor, xd->dst.y_buffer, |
| xd->dst.y_stride, xd->eobs, xd->block[24].diff); |
| } |
| } |
| |
| if( tx_type == TX_8X8 ) |
| DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block_8x8)// |
| (xd->qcoeff+16*16, xd->block[16].dequant, |
| xd->predictor+16*16, xd->dst.u_buffer, xd->dst.v_buffer, |
| xd->dst.uv_stride, xd->eobs+16, xd);// |
| else if(xd->mode_info_context->mbmi.mode!=I8X8_PRED) |
| DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block) |
| (xd->qcoeff+16*16, xd->block[16].dequant, |
| xd->predictor+16*16, xd->dst.u_buffer, xd->dst.v_buffer, |
| xd->dst.uv_stride, xd->eobs+16); |
| } |
| |
| |
| static int get_delta_q(vp8_reader *bc, int prev, int *q_update) |
| { |
| int ret_val = 0; |
| |
| if (vp8_read_bit(bc)) |
| { |
| ret_val = vp8_read_literal(bc, 4); |
| |
| if (vp8_read_bit(bc)) |
| ret_val = -ret_val; |
| } |
| |
| /* Trigger a quantizer update if the delta-q value has changed */ |
| if (ret_val != prev) |
| *q_update = 1; |
| |
| return ret_val; |
| } |
| |
| #ifdef PACKET_TESTING |
| #include <stdio.h> |
| FILE *vpxlog = 0; |
| #endif |
| |
| /* Decode a row of Superblocks (2x2 region of MBs) */ |
| static void |
| decode_sb_row(VP8D_COMP *pbi, VP8_COMMON *pc, int mbrow, MACROBLOCKD *xd) |
| { |
| int i; |
| int sb_col; |
| int mb_row, mb_col; |
| int recon_yoffset, recon_uvoffset; |
| int ref_fb_idx = pc->lst_fb_idx; |
| int dst_fb_idx = pc->new_fb_idx; |
| int recon_y_stride = pc->yv12_fb[ref_fb_idx].y_stride; |
| int recon_uv_stride = pc->yv12_fb[ref_fb_idx].uv_stride; |
| int row_delta[4] = { 0, +1, 0, -1}; |
| int col_delta[4] = {+1, -1, +1, +1}; |
| int sb_cols = (pc->mb_cols + 1)>>1; |
| ENTROPY_CONTEXT_PLANES left_context[2]; |
| |
| // For a SB there are 2 left contexts, each pertaining to a MB row within |
| vpx_memset(left_context, 0, sizeof(left_context)); |
| |
| mb_row = mbrow; |
| mb_col = 0; |
| |
| for (sb_col=0; sb_col<sb_cols; sb_col++) |
| { |
| // Process the 4 MBs within the SB in the order: |
| // top-left, top-right, bottom-left, bottom-right |
| for ( i=0; i<4; i++ ) |
| { |
| int dy = row_delta[i]; |
| int dx = col_delta[i]; |
| int offset_extended = dy * xd->mode_info_stride + dx; |
| |
| if ((mb_row >= pc->mb_rows) || (mb_col >= pc->mb_cols)) |
| { |
| // MB lies outside frame, skip on to next |
| mb_row += dy; |
| mb_col += dx; |
| xd->mode_info_context += offset_extended; |
| continue; |
| } |
| |
| #ifdef DEC_DEBUG |
| dec_debug = (pc->current_video_frame==0 && mb_row==0 && mb_col==0); |
| #endif |
| // Copy in the appropriate left context for this MB row |
| vpx_memcpy (&pc->left_context, |
| &left_context[i>>1], |
| sizeof(ENTROPY_CONTEXT_PLANES)); |
| |
| // Set above context pointer |
| xd->above_context = pc->above_context + mb_col; |
| |
| /* Distance of Mb to the various image edges. |
| * These are specified to 8th pel as they are always compared to |
| * values that are in 1/8th pel units |
| */ |
| xd->mb_to_top_edge = -((mb_row * 16)) << 3; |
| xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3; |
| |
| xd->mb_to_left_edge = -((mb_col * 16) << 3); |
| xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3; |
| |
| xd->up_available = (mb_row != 0); |
| xd->left_available = (mb_col != 0); |
| |
| update_blockd_bmi(xd); |
| |
| recon_yoffset = (mb_row * recon_y_stride * 16) + (mb_col * 16); |
| recon_uvoffset = (mb_row * recon_uv_stride * 8) + (mb_col * 8); |
| |
| xd->dst.y_buffer = pc->yv12_fb[dst_fb_idx].y_buffer + recon_yoffset; |
| xd->dst.u_buffer = pc->yv12_fb[dst_fb_idx].u_buffer + recon_uvoffset; |
| xd->dst.v_buffer = pc->yv12_fb[dst_fb_idx].v_buffer + recon_uvoffset; |
| |
| /* Select the appropriate reference frame for this MB */ |
| if (xd->mode_info_context->mbmi.ref_frame == LAST_FRAME) |
| ref_fb_idx = pc->lst_fb_idx; |
| else if (xd->mode_info_context->mbmi.ref_frame == GOLDEN_FRAME) |
| ref_fb_idx = pc->gld_fb_idx; |
| else |
| ref_fb_idx = pc->alt_fb_idx; |
| |
| xd->pre.y_buffer = pc->yv12_fb[ref_fb_idx].y_buffer +recon_yoffset; |
| xd->pre.u_buffer = pc->yv12_fb[ref_fb_idx].u_buffer +recon_uvoffset; |
| xd->pre.v_buffer = pc->yv12_fb[ref_fb_idx].v_buffer +recon_uvoffset; |
| |
| if (xd->mode_info_context->mbmi.second_ref_frame) |
| { |
| int second_ref_fb_idx; |
| |
| /* Select the appropriate reference frame for this MB */ |
| if (xd->mode_info_context->mbmi.second_ref_frame == LAST_FRAME) |
| second_ref_fb_idx = pc->lst_fb_idx; |
| else if (xd->mode_info_context->mbmi.second_ref_frame == |
| GOLDEN_FRAME) |
| second_ref_fb_idx = pc->gld_fb_idx; |
| else |
| second_ref_fb_idx = pc->alt_fb_idx; |
| |
| xd->second_pre.y_buffer = |
| pc->yv12_fb[second_ref_fb_idx].y_buffer + recon_yoffset; |
| xd->second_pre.u_buffer = |
| pc->yv12_fb[second_ref_fb_idx].u_buffer + recon_uvoffset; |
| xd->second_pre.v_buffer = |
| pc->yv12_fb[second_ref_fb_idx].v_buffer + recon_uvoffset; |
| } |
| |
| if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME) |
| { |
| /* propagate errors from reference frames */ |
| xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted; |
| } |
| |
| decode_macroblock(pbi, xd, mb_row * pc->mb_cols + mb_col); |
| |
| /* check if the boolean decoder has suffered an error */ |
| xd->corrupted |= vp8dx_bool_error(xd->current_bc); |
| |
| // Store the modified left context for the MB row locally |
| vpx_memcpy (&left_context[i>>1], |
| &pc->left_context, |
| sizeof(ENTROPY_CONTEXT_PLANES)); |
| |
| // skip to next MB |
| xd->mode_info_context += offset_extended; |
| mb_row += dy; |
| mb_col += dx; |
| } |
| } |
| |
| /* skip prediction column */ |
| xd->mode_info_context += 1 - (pc->mb_cols & 0x1) + xd->mode_info_stride; |
| } |
| |
| static unsigned int read_partition_size(const unsigned char *cx_size) |
| { |
| const unsigned int size = |
| cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16); |
| return size; |
| } |
| |
| static int read_is_valid(const unsigned char *start, |
| size_t len, |
| const unsigned char *end) |
| { |
| return (start + len > start && start + len <= end); |
| } |
| |
| |
| static void setup_token_decoder(VP8D_COMP *pbi, |
| const unsigned char *cx_data) |
| { |
| VP8_COMMON *pc = &pbi->common; |
| const unsigned char *user_data_end = pbi->Source + pbi->source_sz; |
| vp8_reader *bool_decoder; |
| const unsigned char *partition; |
| |
| ptrdiff_t partition_size; |
| ptrdiff_t bytes_left; |
| |
| // Dummy read for now |
| vp8_read_literal(&pbi->bc, 2); |
| |
| // Set up pointers to token partition |
| partition = cx_data; |
| bool_decoder = &pbi->bc2; |
| bytes_left = user_data_end - partition; |
| partition_size = bytes_left; |
| |
| /* Validate the calculated partition length. If the buffer |
| * described by the partition can't be fully read, then restrict |
| * it to the portion that can be (for EC mode) or throw an error. |
| */ |
| if (!read_is_valid(partition, partition_size, user_data_end)) |
| { |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition " |
| "%d length", 1); |
| } |
| |
| if (vp8dx_start_decode(bool_decoder, partition, partition_size)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder %d", 1); |
| } |
| |
| static void init_frame(VP8D_COMP *pbi) |
| { |
| VP8_COMMON *const pc = & pbi->common; |
| MACROBLOCKD *const xd = & pbi->mb; |
| |
| if (pc->frame_type == KEY_FRAME) |
| { |
| /* Various keyframe initializations */ |
| vpx_memcpy(pc->fc.mvc, vp8_default_mv_context, sizeof(vp8_default_mv_context)); |
| #if CONFIG_HIGH_PRECISION_MV |
| vpx_memcpy(pc->fc.mvc_hp, vp8_default_mv_context_hp, |
| sizeof(vp8_default_mv_context_hp)); |
| #endif |
| |
| vp8_init_mbmode_probs(pc); |
| |
| vp8_default_coef_probs(pc); |
| vp8_kf_default_bmode_probs(pc->kf_bmode_prob); |
| |
| // Reset the segment feature data to the default stats: |
| // Features disabled, 0, with delta coding (Default state). |
| clearall_segfeatures( xd ); |
| |
| xd->mb_segment_abs_delta = SEGMENT_DELTADATA; |
| |
| /* reset the mode ref deltasa for loop filter */ |
| vpx_memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas)); |
| vpx_memset(xd->mode_lf_deltas, 0, sizeof(xd->mode_lf_deltas)); |
| |
| /* All buffers are implicitly updated on key frames. */ |
| pc->refresh_golden_frame = 1; |
| pc->refresh_alt_ref_frame = 1; |
| pc->copy_buffer_to_gf = 0; |
| pc->copy_buffer_to_arf = 0; |
| |
| /* Note that Golden and Altref modes cannot be used on a key frame so |
| * ref_frame_sign_bias[] is undefined and meaningless |
| */ |
| pc->ref_frame_sign_bias[GOLDEN_FRAME] = 0; |
| pc->ref_frame_sign_bias[ALTREF_FRAME] = 0; |
| |
| vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); |
| vpx_memcpy(&pc->lfc_a, &pc->fc, sizeof(pc->fc)); |
| |
| vp8_init_mode_contexts(&pbi->common); |
| vpx_memcpy( pbi->common.vp8_mode_contexts, |
| pbi->common.mode_context, |
| sizeof(pbi->common.mode_context)); |
| } |
| else |
| { |
| |
| if (!pc->use_bilinear_mc_filter) |
| #if CONFIG_ENHANCED_INTERP |
| pc->mcomp_filter_type = EIGHTTAP; |
| #else |
| pc->mcomp_filter_type = SIXTAP; |
| #endif |
| else |
| pc->mcomp_filter_type = BILINEAR; |
| |
| /* To enable choice of different interploation filters */ |
| if (pc->mcomp_filter_type == SIXTAP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg4x4); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg16x16); |
| } |
| #if CONFIG_ENHANCED_INTERP |
| else if (pc->mcomp_filter_type == EIGHTTAP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap16x16); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE( |
| RTCD_VTABLE(subpix), eighttap_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE( |
| RTCD_VTABLE(subpix), eighttap_avg16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg4x4); |
| } |
| else if (pc->mcomp_filter_type == EIGHTTAP_SHARP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap4x4_sharp); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x4_sharp); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x8_sharp); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap16x16_sharp); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg4x4_sharp); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE( |
| RTCD_VTABLE(subpix), eighttap_avg8x8_sharp); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE( |
| RTCD_VTABLE(subpix), eighttap_avg16x16_sharp); |
| } |
| #endif |
| else |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg4x4); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg16x16); |
| } |
| } |
| |
| xd->left_context = &pc->left_context; |
| xd->mode_info_context = pc->mi; |
| xd->frame_type = pc->frame_type; |
| xd->mode_info_context->mbmi.mode = DC_PRED; |
| xd->mode_info_stride = pc->mode_info_stride; |
| xd->corrupted = 0; /* init without corruption */ |
| |
| xd->fullpixel_mask = 0xffffffff; |
| if(pc->full_pixel) |
| xd->fullpixel_mask = 0xfffffff8; |
| |
| } |
| |
| #if CONFIG_NEWUPDATE |
| static void read_coef_probs3(VP8D_COMP *pbi) |
| { |
| const vp8_prob grpupd = 216; |
| int i, j, k, l; |
| vp8_reader *const bc = & pbi->bc; |
| VP8_COMMON *const pc = & pbi->common; |
| for (i = 0; i < BLOCK_TYPES; i++) |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| if(vp8_read(bc, grpupd)) |
| { |
| //printf("Decoding %d\n", l); |
| for (j = !i; j < COEF_BANDS; j++) |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| { |
| vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l; |
| int u = vp8_read(bc, vp8_coef_update_probs [i][j][k][l]); |
| if (u) |
| { |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| } |
| } |
| } |
| } |
| } |
| |
| if(pbi->common.txfm_mode == ALLOW_8X8) |
| { |
| for (i = 0; i < BLOCK_TYPES_8X8; i++) |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| if(vp8_read(bc, grpupd)) |
| { |
| for (j = !i; j < COEF_BANDS; j++) |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| { |
| vp8_prob *const p = pc->fc.coef_probs_8x8 [i][j][k] + l; |
| int u = vp8_read(bc, vp8_coef_update_probs_8x8 [i][j][k][l]); |
| if (u) |
| { |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| static void read_coef_probs2(VP8D_COMP *pbi) |
| { |
| const vp8_prob grpupd = 192; |
| int i, j, k, l; |
| vp8_reader *const bc = & pbi->bc; |
| VP8_COMMON *const pc = & pbi->common; |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| if(vp8_read(bc, grpupd)) |
| { |
| //printf("Decoding %d\n", l); |
| for (i = 0; i < BLOCK_TYPES; i++) |
| for (j = !i; j < COEF_BANDS; j++) |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| { |
| vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l; |
| int u = vp8_read(bc, vp8_coef_update_probs [i][j][k][l]); |
| if (u) |
| { |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| } |
| } |
| } |
| } |
| } |
| if(pbi->common.txfm_mode == ALLOW_8X8) |
| { |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| if(vp8_read(bc, grpupd)) |
| { |
| for (i = 0; i < BLOCK_TYPES_8X8; i++) |
| for (j = !i; j < COEF_BANDS; j++) |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| { |
| vp8_prob *const p = pc->fc.coef_probs_8x8 [i][j][k] + l; |
| |
| int u = vp8_read(bc, vp8_coef_update_probs_8x8 [i][j][k][l]); |
| if (u) |
| { |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
| #endif |
| |
| static void read_coef_probs(VP8D_COMP *pbi) |
| { |
| int i, j, k, l; |
| vp8_reader *const bc = & pbi->bc; |
| VP8_COMMON *const pc = & pbi->common; |
| |
| { |
| if(vp8_read_bit(bc)) |
| { |
| /* read coef probability tree */ |
| for (i = 0; i < BLOCK_TYPES; i++) |
| #if CONFIG_NEWUPDATE |
| for (j = !i; j < COEF_BANDS; j++) |
| #else |
| for (j = 0; j < COEF_BANDS; j++) |
| #endif |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| vp8_prob *const p = pc->fc.coef_probs [i][j][k] + l; |
| |
| if (vp8_read(bc, vp8_coef_update_probs [i][j][k][l])) |
| { |
| #if CONFIG_NEWUPDATE |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| //printf("delp = %d/%d", *p, delp); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| //printf("/%d\n", *p); |
| #else |
| *p = (vp8_prob)vp8_read_literal(bc, 8); |
| #endif |
| } |
| } |
| } |
| } |
| } |
| |
| if(pbi->common.txfm_mode == ALLOW_8X8 && vp8_read_bit(bc)) |
| { |
| // read coef probability tree |
| for (i = 0; i < BLOCK_TYPES_8X8; i++) |
| #if CONFIG_NEWUPDATE |
| for (j = !i; j < COEF_BANDS; j++) |
| #else |
| for (j = 0; j < COEF_BANDS; j++) |
| #endif |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| { |
| #if CONFIG_EXPANDED_COEF_CONTEXT |
| if (k >= 3 && ((i == 0 && j == 1) || |
| (i > 0 && j == 0))) |
| continue; |
| #endif |
| for (l = 0; l < ENTROPY_NODES; l++) |
| { |
| |
| vp8_prob *const p = pc->fc.coef_probs_8x8 [i][j][k] + l; |
| |
| if (vp8_read(bc, vp8_coef_update_probs_8x8 [i][j][k][l])) |
| { |
| #if CONFIG_NEWUPDATE |
| int delp = vp8_decode_term_subexp(bc, SUBEXP_PARAM, 255); |
| *p = (vp8_prob)inv_remap_prob(delp, *p); |
| #else |
| *p = (vp8_prob)vp8_read_literal(bc, 8); |
| #endif |
| } |
| } |
| } |
| } |
| } |
| |
| int vp8_decode_frame(VP8D_COMP *pbi) |
| { |
| vp8_reader *const bc = & pbi->bc; |
| VP8_COMMON *const pc = & pbi->common; |
| MACROBLOCKD *const xd = & pbi->mb; |
| const unsigned char *data = (const unsigned char *)pbi->Source; |
| const unsigned char *data_end = data + pbi->source_sz; |
| ptrdiff_t first_partition_length_in_bytes; |
| |
| int mb_row; |
| int i, j, k, l; |
| int corrupt_tokens = 0; |
| |
| /* start with no corruption of current frame */ |
| xd->corrupted = 0; |
| pc->yv12_fb[pc->new_fb_idx].corrupted = 0; |
| |
| if (data_end - data < 3) |
| { |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet"); |
| } |
| else |
| { |
| pc->frame_type = (FRAME_TYPE)(data[0] & 1); |
| pc->version = (data[0] >> 1) & 7; |
| pc->show_frame = (data[0] >> 4) & 1; |
| first_partition_length_in_bytes = |
| (data[0] | (data[1] << 8) | (data[2] << 16)) >> 5; |
| |
| if ((data + first_partition_length_in_bytes > data_end |
| || data + first_partition_length_in_bytes < data)) |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition 0 length"); |
| |
| data += 3; |
| |
| vp8_setup_version(pc); |
| |
| if (pc->frame_type == KEY_FRAME) |
| { |
| const int Width = pc->Width; |
| const int Height = pc->Height; |
| |
| /* vet via sync code */ |
| /* When error concealment is enabled we should only check the sync |
| * code if we have enough bits available |
| */ |
| if (data + 3 < data_end) |
| { |
| if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a) |
| vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "Invalid frame sync code"); |
| } |
| |
| /* If error concealment is enabled we should only parse the new size |
| * if we have enough data. Otherwise we will end up with the wrong |
| * size. |
| */ |
| if (data + 6 < data_end) |
| { |
| pc->Width = (data[3] | (data[4] << 8)) & 0x3fff; |
| pc->horiz_scale = data[4] >> 6; |
| pc->Height = (data[5] | (data[6] << 8)) & 0x3fff; |
| pc->vert_scale = data[6] >> 6; |
| } |
| data += 7; |
| |
| if (Width != pc->Width || Height != pc->Height) |
| { |
| if (pc->Width <= 0) |
| { |
| pc->Width = Width; |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Invalid frame width"); |
| } |
| |
| if (pc->Height <= 0) |
| { |
| pc->Height = Height; |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Invalid frame height"); |
| } |
| |
| if (vp8_alloc_frame_buffers(pc, pc->Width, pc->Height)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate frame buffers"); |
| } |
| } |
| } |
| |
| if ((!pbi->decoded_key_frame && pc->frame_type != KEY_FRAME) || |
| pc->Width == 0 || pc->Height == 0) |
| { |
| return -1; |
| } |
| |
| init_frame(pbi); |
| |
| if (vp8dx_start_decode(bc, data, data_end - data)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder 0"); |
| if (pc->frame_type == KEY_FRAME) { |
| pc->clr_type = (YUV_TYPE)vp8_read_bit(bc); |
| pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bc); |
| } |
| |
| /* Is segmentation enabled */ |
| xd->segmentation_enabled = (unsigned char)vp8_read_bit(bc); |
| |
| if (xd->segmentation_enabled) |
| { |
| // Read whether or not the segmentation map is being explicitly |
| // updated this frame. |
| xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc); |
| |
| // If so what method will be used. |
| if ( xd->update_mb_segmentation_map ) |
| pc->temporal_update = (unsigned char)vp8_read_bit(bc); |
| |
| // Is the segment data being updated |
| xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc); |
| |
| if (xd->update_mb_segmentation_data) |
| { |
| int data; |
| |
| xd->mb_segment_abs_delta = (unsigned char)vp8_read_bit(bc); |
| |
| clearall_segfeatures( xd ); |
| |
| // For each segmentation... |
| for (i = 0; i < MAX_MB_SEGMENTS; i++) |
| { |
| // For each of the segments features... |
| for (j = 0; j < SEG_LVL_MAX; j++) |
| { |
| |
| #if CONFIG_FEATUREUPDATES |
| // feature updated? |
| if (vp8_read_bit(bc)) |
| { |
| int active=1; |
| |
| if ( segfeature_active( xd, i, j )) |
| active=vp8_read_bit(bc); |
| |
| // Is the feature enabled |
| if (active) |
| { |
| // Update the feature data and mask |
| enable_segfeature(xd, i, j); |
| |
| data = (signed char)vp8_read_literal( |
| bc, seg_feature_data_bits(j)); |
| |
| // Is the segment data signed.. |
| if ( is_segfeature_signed(j) ) |
| { |
| if (vp8_read_bit(bc)) |
| data = - data; |
| } |
| } |
| else |
| data = 0; |
| |
| set_segdata(xd, i, j, data); |
| } |
| |
| #else |
| // Is the feature enabled |
| if (vp8_read_bit(bc)) |
| { |
| // Update the feature data and mask |
| enable_segfeature(xd, i, j); |
| |
| data = (signed char)vp8_read_literal( |
| bc, seg_feature_data_bits(j)); |
| |
| // Is the segment data signed.. |
| if ( is_segfeature_signed(j) ) |
| { |
| if (vp8_read_bit(bc)) |
| data = - data; |
| } |
| } |
| else |
| data = 0; |
| |
| set_segdata(xd, i, j, data); |
| #endif |
| } |
| } |
| } |
| |
| if (xd->update_mb_segmentation_map) |
| { |
| // Which macro block level features are enabled |
| vpx_memset(xd->mb_segment_tree_probs, 255, |
| sizeof(xd->mb_segment_tree_probs)); |
| vpx_memset(pc->segment_pred_probs, 255, |
| sizeof(pc->segment_pred_probs)); |
| |
| // Read the probs used to decode the segment id for each macro |
| // block. |
| for (i = 0; i < MB_FEATURE_TREE_PROBS; i++) |
| { |
| // If not explicitly set value is defaulted to 255 by |
| //memset above |
| if (vp8_read_bit(bc)) |
| xd->mb_segment_tree_probs[i] = |
| (vp8_prob)vp8_read_literal(bc, 8); |
| } |
| |
| // If predictive coding of segment map is enabled read the |
| // prediction probabilities. |
| if ( pc->temporal_update ) |
| { |
| // Read the prediction probs needed to decode the segment id |
| // when predictive coding enabled |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| { |
| // If not explicitly set value is defaulted to 255 by |
| // memset above |
| if (vp8_read_bit(bc)) |
| pc->segment_pred_probs[i] = |
| (vp8_prob)vp8_read_literal(bc, 8); |
| } |
| } |
| } |
| } |
| |
| // Read common prediction model status flag probability updates for the |
| // reference frame |
| if ( pc->frame_type == KEY_FRAME ) |
| { |
| // Set the prediction probabilities to defaults |
| pc->ref_pred_probs[0] = 120; |
| pc->ref_pred_probs[1] = 80; |
| pc->ref_pred_probs[2] = 40; |
| } |
| else |
| { |
| for (i = 0; i < PREDICTION_PROBS; i++) |
| { |
| if ( vp8_read_bit(bc) ) |
| pc->ref_pred_probs[i] = (vp8_prob)vp8_read_literal(bc, 8); |
| } |
| } |
| |
| /* Read the loop filter level and type */ |
| pc->txfm_mode = (TXFM_MODE) vp8_read_bit(bc); |
| |
| pc->filter_type = (LOOPFILTERTYPE) vp8_read_bit(bc); |
| pc->filter_level = vp8_read_literal(bc, 6); |
| pc->sharpness_level = vp8_read_literal(bc, 3); |
| |
| /* Read in loop filter deltas applied at the MB level based on mode or ref frame. */ |
| xd->mode_ref_lf_delta_update = 0; |
| xd->mode_ref_lf_delta_enabled = (unsigned char)vp8_read_bit(bc); |
| |
| if (xd->mode_ref_lf_delta_enabled) |
| { |
| /* Do the deltas need to be updated */ |
| xd->mode_ref_lf_delta_update = (unsigned char)vp8_read_bit(bc); |
| |
| if (xd->mode_ref_lf_delta_update) |
| { |
| /* Send update */ |
| for (i = 0; i < MAX_REF_LF_DELTAS; i++) |
| { |
| if (vp8_read_bit(bc)) |
| { |
| /*sign = vp8_read_bit( bc );*/ |
| xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); |
| |
| if (vp8_read_bit(bc)) /* Apply sign */ |
| xd->ref_lf_deltas[i] = xd->ref_lf_deltas[i] * -1; |
| } |
| } |
| |
| /* Send update */ |
| for (i = 0; i < MAX_MODE_LF_DELTAS; i++) |
| { |
| if (vp8_read_bit(bc)) |
| { |
| /*sign = vp8_read_bit( bc );*/ |
| xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bc, 6); |
| |
| if (vp8_read_bit(bc)) /* Apply sign */ |
| xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1; |
| } |
| } |
| } |
| } |
| |
| setup_token_decoder(pbi, data + first_partition_length_in_bytes); |
| |
| xd->current_bc = &pbi->bc2; |
| |
| /* Read the default quantizers. */ |
| { |
| int Q, q_update; |
| |
| Q = vp8_read_literal(bc, QINDEX_BITS); /* AC 1st order Q = default */ |
| pc->base_qindex = Q; |
| q_update = 0; |
| pc->y1dc_delta_q = get_delta_q(bc, pc->y1dc_delta_q, &q_update); |
| pc->y2dc_delta_q = get_delta_q(bc, pc->y2dc_delta_q, &q_update); |
| pc->y2ac_delta_q = get_delta_q(bc, pc->y2ac_delta_q, &q_update); |
| pc->uvdc_delta_q = get_delta_q(bc, pc->uvdc_delta_q, &q_update); |
| pc->uvac_delta_q = get_delta_q(bc, pc->uvac_delta_q, &q_update); |
| |
| if (q_update) |
| vp8cx_init_de_quantizer(pbi); |
| |
| /* MB level dequantizer setup */ |
| mb_init_dequantizer(pbi, &pbi->mb); |
| } |
| |
| /* Determine if the golden frame or ARF buffer should be updated and how. |
| * For all non key frames the GF and ARF refresh flags and sign bias |
| * flags must be set explicitly. |
| */ |
| if (pc->frame_type != KEY_FRAME) |
| { |
| /* Should the GF or ARF be updated from the current frame */ |
| pc->refresh_golden_frame = vp8_read_bit(bc); |
| pc->refresh_alt_ref_frame = vp8_read_bit(bc); |
| |
| if(pc->refresh_alt_ref_frame) |
| { |
| vpx_memcpy(&pc->fc, &pc->lfc_a, sizeof(pc->fc)); |
| vpx_memcpy( pc->vp8_mode_contexts, |
| pc->mode_context_a, |
| sizeof(pc->vp8_mode_contexts)); |
| } |
| else |
| { |
| vpx_memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc)); |
| vpx_memcpy( pc->vp8_mode_contexts, |
| pc->mode_context, |
| sizeof(pc->vp8_mode_contexts)); |
| } |
| |
| /* Buffer to buffer copy flags. */ |
| pc->copy_buffer_to_gf = 0; |
| |
| if (!pc->refresh_golden_frame) |
| pc->copy_buffer_to_gf = vp8_read_literal(bc, 2); |
| |
| pc->copy_buffer_to_arf = 0; |
| |
| if (!pc->refresh_alt_ref_frame) |
| pc->copy_buffer_to_arf = vp8_read_literal(bc, 2); |
| |
| pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bc); |
| pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bc); |
| |
| #if CONFIG_HIGH_PRECISION_MV |
| /* Is high precision mv allowed */ |
| xd->allow_high_precision_mv = (unsigned char)vp8_read_bit(bc); |
| #endif |
| #if CONFIG_ENHANCED_INTERP |
| // Read the type of subpel filter to use |
| pc->mcomp_filter_type = vp8_read_literal(bc, 2); |
| /* To enable choice of different interploation filters */ |
| if (pc->mcomp_filter_type == SIXTAP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg4x4); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), sixtap_avg16x16); |
| } |
| else if (pc->mcomp_filter_type == EIGHTTAP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg4x4); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg16x16); |
| } |
| else if (pc->mcomp_filter_type == EIGHTTAP_SHARP) |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap4x4_sharp); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x4_sharp); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap8x8_sharp); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap16x16_sharp); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg4x4_sharp); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg8x8_sharp); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), eighttap_avg16x16_sharp); |
| } |
| else |
| { |
| xd->subpixel_predict = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear4x4); |
| xd->subpixel_predict8x4 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x4); |
| xd->subpixel_predict8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear8x8); |
| xd->subpixel_predict16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear16x16); |
| xd->subpixel_predict_avg = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg4x4); |
| xd->subpixel_predict_avg8x8 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg8x8); |
| xd->subpixel_predict_avg16x16 = SUBPIX_INVOKE(RTCD_VTABLE(subpix), bilinear_avg16x16); |
| } |
| #endif |
| } |
| |
| pc->refresh_entropy_probs = vp8_read_bit(bc); |
| if (pc->refresh_entropy_probs == 0) |
| { |
| vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); |
| } |
| |
| pc->refresh_last_frame = pc->frame_type == KEY_FRAME || vp8_read_bit(bc); |
| |
| if (0) |
| { |
| FILE *z = fopen("decodestats.stt", "a"); |
| fprintf(z, "%6d F:%d,G:%d,A:%d,L:%d,Q:%d\n", |
| pc->current_video_frame, |
| pc->frame_type, |
| pc->refresh_golden_frame, |
| pc->refresh_alt_ref_frame, |
| pc->refresh_last_frame, |
| pc->base_qindex); |
| fclose(z); |
| } |
| |
| #if COEFUPDATETYPE == 2 |
| read_coef_probs2(pbi); |
| #elif COEFUPDATETYPE == 3 |
| read_coef_probs3(pbi); |
| #else |
| read_coef_probs(pbi); |
| #endif |
| |
| vpx_memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG)); |
| vpx_memcpy(&xd->dst, &pc->yv12_fb[pc->new_fb_idx], sizeof(YV12_BUFFER_CONFIG)); |
| |
| // Create the segmentation map structure and set to 0 |
| if (!pc->last_frame_seg_map) |
| CHECK_MEM_ERROR(pc->last_frame_seg_map, |
| vpx_calloc((pc->mb_rows * pc->mb_cols), 1)); |
| |
| /* set up frame new frame for intra coded blocks */ |
| vp8_setup_intra_recon(&pc->yv12_fb[pc->new_fb_idx]); |
| |
| vp8_setup_block_dptrs(xd); |
| |
| vp8_build_block_doffsets(xd); |
| |
| /* clear out the coeff buffer */ |
| vpx_memset(xd->qcoeff, 0, sizeof(xd->qcoeff)); |
| |
| /* Read the mb_no_coeff_skip flag */ |
| pc->mb_no_coeff_skip = (int)vp8_read_bit(bc); |
| |
| vp8_decode_mode_mvs(pbi); |
| if(pbi->common.frame_type != KEY_FRAME) |
| { |
| vp8_update_mode_context(&pbi->common); |
| } |
| |
| vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols); |
| |
| // Resset the macroblock mode info context to the start of the list |
| xd->mode_info_context = pc->mi; |
| |
| /* Decode a row of superblocks */ |
| for (mb_row = 0; mb_row < pc->mb_rows; mb_row+=2) |
| { |
| decode_sb_row(pbi, pc, mb_row, xd); |
| } |
| corrupt_tokens |= xd->corrupted; |
| |
| /* Collect information about decoder corruption. */ |
| /* 1. Check first boolean decoder for errors. */ |
| pc->yv12_fb[pc->new_fb_idx].corrupted = vp8dx_bool_error(bc); |
| /* 2. Check the macroblock information */ |
| pc->yv12_fb[pc->new_fb_idx].corrupted |= corrupt_tokens; |
| |
| if (!pbi->decoded_key_frame) |
| { |
| if (pc->frame_type == KEY_FRAME && |
| !pc->yv12_fb[pc->new_fb_idx].corrupted) |
| pbi->decoded_key_frame = 1; |
| else |
| vpx_internal_error(&pbi->common.error, VPX_CODEC_CORRUPT_FRAME, |
| "A stream must start with a complete key frame"); |
| } |
| |
| /* vpx_log("Decoder: Frame Decoded, Size Roughly:%d bytes \n",bc->pos+pbi->bc2.pos); */ |
| |
| /* If this was a kf or Gf note the Q used */ |
| if ((pc->frame_type == KEY_FRAME) || |
| pc->refresh_golden_frame || pc->refresh_alt_ref_frame) |
| { |
| pc->last_kf_gf_q = pc->base_qindex; |
| } |
| if(pc->refresh_entropy_probs) |
| { |
| if(pc->refresh_alt_ref_frame) |
| vpx_memcpy(&pc->lfc_a, &pc->fc, sizeof(pc->fc)); |
| else |
| vpx_memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); |
| } |
| |
| #ifdef PACKET_TESTING |
| { |
| FILE *f = fopen("decompressor.VP8", "ab"); |
| unsigned int size = pbi->bc2.pos + pbi->bc.pos + 8; |
| fwrite((void *) &size, 4, 1, f); |
| fwrite((void *) pbi->Source, size, 1, f); |
| fclose(f); |
| } |
| #endif |
| //printf("Frame %d Done\n", frame_count++); |
| |
| return 0; |
| } |
