| /* |
| * 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 "header.h" |
| #include "reconintra.h" |
| #include "reconintra4x4.h" |
| #include "recon.h" |
| #include "reconinter.h" |
| #include "dequantize.h" |
| #include "detokenize.h" |
| #include "invtrans.h" |
| #include "alloccommon.h" |
| #include "entropymode.h" |
| #include "quant_common.h" |
| |
| #include "setupintrarecon.h" |
| |
| #include "decodemv.h" |
| #include "extend.h" |
| #include "vpx_mem/vpx_mem.h" |
| #include "idct.h" |
| #include "dequantize.h" |
| #include "predictdc.h" |
| #include "threading.h" |
| #include "decoderthreading.h" |
| #include "dboolhuff.h" |
| |
| #include <assert.h> |
| #include <stdio.h> |
| |
| void vp8cx_init_de_quantizer(VP8D_COMP *pbi) |
| { |
| int r, c; |
| int i; |
| int Q; |
| VP8_COMMON *const pc = & pbi->common; |
| |
| for (Q = 0; Q < QINDEX_RANGE; Q++) |
| { |
| pc->Y1dequant[Q][0][0] = (short)vp8_dc_quant(Q, pc->y1dc_delta_q); |
| pc->Y2dequant[Q][0][0] = (short)vp8_dc2quant(Q, pc->y2dc_delta_q); |
| pc->UVdequant[Q][0][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]; |
| r = (rc >> 2); |
| c = (rc & 3); |
| |
| pc->Y1dequant[Q][r][c] = (short)vp8_ac_yquant(Q); |
| pc->Y2dequant[Q][r][c] = (short)vp8_ac2quant(Q, pc->y2ac_delta_q); |
| pc->UVdequant[Q][r][c] = (short)vp8_ac_uv_quant(Q, pc->uvac_delta_q); |
| } |
| } |
| } |
| |
| static void mb_init_dequantizer(VP8D_COMP *pbi, MACROBLOCKD *xd) |
| { |
| int i; |
| int QIndex; |
| MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi; |
| VP8_COMMON *const pc = & pbi->common; |
| |
| // Decide whether to use the default or alternate baseline Q value. |
| if (xd->segmentation_enabled) |
| { |
| // Abs Value |
| if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA) |
| QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; |
| |
| // Delta Value |
| else |
| { |
| QIndex = pc->base_qindex + xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; |
| 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->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) |
| { |
| |
| vp8_build_intra_predictors_mbuv_s(xd); |
| vp8_build_intra_predictors_mby_s_ptr(xd); |
| |
| } |
| else |
| { |
| vp8_build_inter_predictors_mb_s(xd); |
| } |
| } |
| |
| static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd) |
| { |
| /* If the MV points so far into the UMV border that no visible pixels |
| * are used for reconstruction, the subpel part of the MV can be |
| * discarded and the MV limited to 16 pixels with equivalent results. |
| * |
| * This limit kicks in at 19 pixels for the top and left edges, for |
| * the 16 pixels plus 3 taps right of the central pixel when subpel |
| * filtering. The bottom and right edges use 16 pixels plus 2 pixels |
| * left of the central pixel when filtering. |
| */ |
| if (mv->col < (xd->mb_to_left_edge - (19 << 3))) |
| mv->col = xd->mb_to_left_edge - (16 << 3); |
| else if (mv->col > xd->mb_to_right_edge + (18 << 3)) |
| mv->col = xd->mb_to_right_edge + (16 << 3); |
| |
| if (mv->row < (xd->mb_to_top_edge - (19 << 3))) |
| mv->row = xd->mb_to_top_edge - (16 << 3); |
| else if (mv->row > xd->mb_to_bottom_edge + (18 << 3)) |
| mv->row = xd->mb_to_bottom_edge + (16 << 3); |
| } |
| |
| /* A version of the above function for chroma block MVs.*/ |
| static void clamp_uvmv_to_umv_border(MV *mv, const MACROBLOCKD *xd) |
| { |
| mv->col = (2*mv->col < (xd->mb_to_left_edge - (19 << 3))) ? (xd->mb_to_left_edge - (16 << 3)) >> 1 : mv->col; |
| mv->col = (2*mv->col > xd->mb_to_right_edge + (18 << 3)) ? (xd->mb_to_right_edge + (16 << 3)) >> 1 : mv->col; |
| |
| mv->row = (2*mv->row < (xd->mb_to_top_edge - (19 << 3))) ? (xd->mb_to_top_edge - (16 << 3)) >> 1 : mv->row; |
| mv->row = (2*mv->row > xd->mb_to_bottom_edge + (18 << 3)) ? (xd->mb_to_bottom_edge + (16 << 3)) >> 1 : mv->row; |
| } |
| |
| static void clamp_mvs(MACROBLOCKD *xd) |
| { |
| if (xd->mode_info_context->mbmi.mode == SPLITMV) |
| { |
| int i; |
| |
| for (i=0; i<16; i++) |
| clamp_mv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); |
| for (i=16; i<24; i++) |
| clamp_uvmv_to_umv_border(&xd->block[i].bmi.mv.as_mv, xd); |
| } |
| else |
| { |
| clamp_mv_to_umv_border(&xd->mode_info_context->mbmi.mv.as_mv, xd); |
| clamp_uvmv_to_umv_border(&xd->block[16].bmi.mv.as_mv, xd); |
| } |
| |
| } |
| |
| void vp8_decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd) |
| { |
| int eobtotal = 0; |
| int i, do_clamp = xd->mode_info_context->mbmi.need_to_clamp_mvs; |
| |
| if (xd->mode_info_context->mbmi.mb_skip_coeff) |
| { |
| vp8_reset_mb_tokens_context(xd); |
| } |
| else |
| { |
| eobtotal = vp8_decode_mb_tokens(pbi, xd); |
| } |
| |
| /* Perform temporary clamping of the MV to be used for prediction */ |
| if (do_clamp) |
| { |
| clamp_mvs(xd); |
| } |
| |
| xd->mode_info_context->mbmi.dc_diff = 1; |
| |
| if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV && eobtotal == 0) |
| { |
| xd->mode_info_context->mbmi.dc_diff = 0; |
| skip_recon_mb(pbi, xd); |
| return; |
| } |
| |
| if (xd->segmentation_enabled) |
| mb_init_dequantizer(pbi, xd); |
| |
| // do prediction |
| if (xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) |
| { |
| vp8_build_intra_predictors_mbuv(xd); |
| |
| if (xd->mode_info_context->mbmi.mode != B_PRED) |
| { |
| vp8_build_intra_predictors_mby_ptr(xd); |
| } else { |
| vp8_intra_prediction_down_copy(xd); |
| } |
| } |
| else |
| { |
| vp8_build_inter_predictors_mb(xd); |
| } |
| |
| // dequantization and idct |
| if (xd->mode_info_context->mbmi.mode != B_PRED && xd->mode_info_context->mbmi.mode != SPLITMV) |
| { |
| BLOCKD *b = &xd->block[24]; |
| DEQUANT_INVOKE(&pbi->dequant, block)(b); |
| |
| // do 2nd order transform on the dc block |
| 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[0][0], |
| xd->predictor, xd->dst.y_buffer, |
| xd->dst.y_stride, xd->eobs, xd->block[24].diff); |
| } |
| else if ((xd->frame_type == KEY_FRAME || xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) && xd->mode_info_context->mbmi.mode == B_PRED) |
| { |
| for (i = 0; i < 16; i++) |
| { |
| |
| BLOCKD *b = &xd->block[i]; |
| vp8_predict_intra4x4(b, b->bmi.mode, b->predictor); |
| |
| if (xd->eobs[i] > 1) |
| { |
| DEQUANT_INVOKE(&pbi->dequant, idct_add) |
| (b->qcoeff, &b->dequant[0][0], 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][0], b->predictor, |
| *(b->base_dst) + b->dst, 16, b->dst_stride); |
| ((int *)b->qcoeff)[0] = 0; |
| } |
| } |
| |
| } |
| else |
| { |
| DEQUANT_INVOKE (&pbi->dequant, idct_add_y_block) |
| (xd->qcoeff, &xd->block[0].dequant[0][0], |
| xd->predictor, xd->dst.y_buffer, |
| xd->dst.y_stride, xd->eobs); |
| } |
| |
| DEQUANT_INVOKE (&pbi->dequant, idct_add_uv_block) |
| (xd->qcoeff+16*16, &xd->block[16].dequant[0][0], |
| 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 |
| |
| |
| |
| void vp8_decode_mb_row(VP8D_COMP *pbi, |
| VP8_COMMON *pc, |
| int mb_row, |
| MACROBLOCKD *xd) |
| { |
| |
| int i; |
| int recon_yoffset, recon_uvoffset; |
| int mb_col; |
| 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; |
| |
| vpx_memset(&pc->left_context, 0, sizeof(pc->left_context)); |
| recon_yoffset = mb_row * recon_y_stride * 16; |
| recon_uvoffset = mb_row * recon_uv_stride * 8; |
| // reset above block coeffs |
| |
| xd->above_context = pc->above_context; |
| xd->up_available = (mb_row != 0); |
| |
| xd->mb_to_top_edge = -((mb_row * 16)) << 3; |
| xd->mb_to_bottom_edge = ((pc->mb_rows - 1 - mb_row) * 16) << 3; |
| |
| for (mb_col = 0; mb_col < pc->mb_cols; mb_col++) |
| { |
| |
| if (xd->mode_info_context->mbmi.mode == SPLITMV || xd->mode_info_context->mbmi.mode == B_PRED) |
| { |
| for (i = 0; i < 16; i++) |
| { |
| BLOCKD *d = &xd->block[i]; |
| vpx_memcpy(&d->bmi, &xd->mode_info_context->bmi[i], sizeof(B_MODE_INFO)); |
| } |
| } |
| |
| // Distance of Mb to the various image edges. |
| // These specified to 8th pel as they are always compared to values that are in 1/8th pel units |
| xd->mb_to_left_edge = -((mb_col * 16) << 3); |
| xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3; |
| |
| 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; |
| |
| xd->left_available = (mb_col != 0); |
| |
| // 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; |
| |
| vp8_build_uvmvs(xd, pc->full_pixel); |
| |
| /* |
| if(pc->current_video_frame==0 &&mb_col==1 && mb_row==0) |
| pbi->debugoutput =1; |
| else |
| pbi->debugoutput =0; |
| */ |
| vp8_decode_macroblock(pbi, xd); |
| |
| |
| recon_yoffset += 16; |
| recon_uvoffset += 8; |
| |
| ++xd->mode_info_context; /* next mb */ |
| |
| xd->above_context++; |
| |
| pbi->current_mb_col_main = mb_col; |
| } |
| |
| // adjust to the next row of mbs |
| vp8_extend_mb_row( |
| &pc->yv12_fb[dst_fb_idx], |
| xd->dst.y_buffer + 16, xd->dst.u_buffer + 8, xd->dst.v_buffer + 8 |
| ); |
| |
| ++xd->mode_info_context; /* skip prediction column */ |
| |
| pbi->last_mb_row_decoded = mb_row; |
| } |
| |
| |
| 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 void setup_token_decoder(VP8D_COMP *pbi, |
| const unsigned char *cx_data) |
| { |
| int num_part; |
| int i; |
| VP8_COMMON *pc = &pbi->common; |
| const unsigned char *user_data_end = pbi->Source + pbi->source_sz; |
| vp8_reader *bool_decoder; |
| const unsigned char *partition; |
| |
| /* Parse number of token partitions to use */ |
| pc->multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bc, 2); |
| num_part = 1 << pc->multi_token_partition; |
| |
| /* Set up pointers to the first partition */ |
| partition = cx_data; |
| bool_decoder = &pbi->bc2; |
| |
| if (num_part > 1) |
| { |
| CHECK_MEM_ERROR(pbi->mbc, vpx_malloc(num_part * sizeof(vp8_reader))); |
| bool_decoder = pbi->mbc; |
| partition += 3 * (num_part - 1); |
| } |
| |
| for (i = 0; i < num_part; i++) |
| { |
| const unsigned char *partition_size_ptr = cx_data + i * 3; |
| unsigned int partition_size; |
| |
| /* Calculate the length of this partition. The last partition |
| * size is implicit. |
| */ |
| if (i < num_part - 1) |
| { |
| partition_size = read_partition_size(partition_size_ptr); |
| } |
| else |
| { |
| partition_size = user_data_end - partition; |
| } |
| |
| if (partition + partition_size > user_data_end) |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition " |
| "%d length", i + 1); |
| |
| if (vp8dx_start_decode(bool_decoder, IF_RTCD(&pbi->dboolhuff), |
| partition, partition_size)) |
| vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, |
| "Failed to allocate bool decoder %d", i + 1); |
| |
| /* Advance to the next partition */ |
| partition += partition_size; |
| bool_decoder++; |
| } |
| |
| /* Clamp number of decoder threads */ |
| if (pbi->decoding_thread_count > num_part - 1) |
| pbi->decoding_thread_count = num_part - 1; |
| } |
| |
| |
| static void stop_token_decoder(VP8D_COMP *pbi) |
| { |
| int i; |
| VP8_COMMON *pc = &pbi->common; |
| |
| if (pc->multi_token_partition != ONE_PARTITION) |
| vpx_free(pbi->mbc); |
| } |
| |
| 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)); |
| |
| 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 0 with delta coding (Default state). |
| vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); |
| xd->mb_segement_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; |
| } |
| else |
| { |
| if (!pc->use_bilinear_mc_filter) |
| pc->mcomp_filter_type = SIXTAP; |
| 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); |
| } |
| 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->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; |
| } |
| |
| 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 *const data_end = data + pbi->source_sz; |
| int first_partition_length_in_bytes; |
| |
| int mb_row; |
| int i, j, k, l; |
| const int *const mb_feature_data_bits = vp8_mb_feature_data_bits; |
| |
| 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; |
| data += 3; |
| |
| if (data + first_partition_length_in_bytes > data_end) |
| vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, |
| "Truncated packet or corrupt partition 0 length"); |
| vp8_setup_version(pc); |
| |
| if (pc->frame_type == KEY_FRAME) |
| { |
| const int Width = pc->Width; |
| const int Height = pc->Height; |
| |
| // vet via sync code |
| if (data[0] != 0x9d || data[1] != 0x01 || data[2] != 0x2a) |
| vpx_internal_error(&pc->error, VPX_CODEC_UNSUP_BITSTREAM, |
| "Invalid frame sync code"); |
| |
| 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 (pc->Width == 0 || pc->Height == 0) |
| { |
| return -1; |
| } |
| |
| init_frame(pbi); |
| |
| if (vp8dx_start_decode(bc, IF_RTCD(&pbi->dboolhuff), |
| 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) |
| { |
| // Signal whether or not the segmentation map is being explicitly updated this frame. |
| xd->update_mb_segmentation_map = (unsigned char)vp8_read_bit(bc); |
| xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bc); |
| |
| if (xd->update_mb_segmentation_data) |
| { |
| xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bc); |
| |
| vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data)); |
| |
| // For each segmentation feature (Quant and loop filter level) |
| for (i = 0; i < MB_LVL_MAX; i++) |
| { |
| for (j = 0; j < MAX_MB_SEGMENTS; j++) |
| { |
| // Frame level data |
| if (vp8_read_bit(bc)) |
| { |
| xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bc, mb_feature_data_bits[i]); |
| |
| if (vp8_read_bit(bc)) |
| xd->segment_feature_data[i][j] = -xd->segment_feature_data[i][j]; |
| } |
| else |
| xd->segment_feature_data[i][j] = 0; |
| } |
| } |
| } |
| |
| 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)); |
| |
| // 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); |
| } |
| } |
| } |
| |
| // Read the loop filter level and type |
| 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, 7); // 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); |
| |
| // 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); |
| } |
| |
| 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); |
| } |
| |
| |
| { |
| // read coef probability tree |
| |
| for (i = 0; i < BLOCK_TYPES; i++) |
| for (j = 0; j < COEF_BANDS; j++) |
| for (k = 0; k < PREV_COEF_CONTEXTS; k++) |
| for (l = 0; l < MAX_ENTROPY_TOKENS - 1; 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])) |
| { |
| *p = (vp8_prob)vp8_read_literal(bc, 8); |
| |
| } |
| } |
| } |
| |
| 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)); |
| |
| // 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); |
| |
| vpx_memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols); |
| |
| vpx_memcpy(&xd->block[0].bmi, &xd->mode_info_context->bmi[0], sizeof(B_MODE_INFO)); |
| |
| |
| if (pbi->b_multithreaded_lf && pc->filter_level != 0) |
| vp8_start_lfthread(pbi); |
| |
| if (pbi->b_multithreaded_rd && pc->multi_token_partition != ONE_PARTITION) |
| { |
| vp8_mtdecode_mb_rows(pbi, xd); |
| } |
| else |
| { |
| int ibc = 0; |
| int num_part = 1 << pc->multi_token_partition; |
| |
| // Decode the individual macro block |
| for (mb_row = 0; mb_row < pc->mb_rows; mb_row++) |
| { |
| |
| if (num_part > 1) |
| { |
| xd->current_bc = & pbi->mbc[ibc]; |
| ibc++; |
| |
| if (ibc == num_part) |
| ibc = 0; |
| } |
| |
| vp8_decode_mb_row(pbi, pc, mb_row, xd); |
| } |
| |
| pbi->last_mb_row_decoded = mb_row; |
| } |
| |
| |
| stop_token_decoder(pbi); |
| |
| // 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 == 0) |
| { |
| vpx_memcpy(&pc->fc, &pc->lfc, 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 |
| |
| return 0; |
| } |
