diff options
Diffstat (limited to 'src/gallium/auxiliary/vl/vp8/decodeframe.c')
| -rw-r--r-- | src/gallium/auxiliary/vl/vp8/decodeframe.c | 827 |
1 files changed, 827 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/vl/vp8/decodeframe.c b/src/gallium/auxiliary/vl/vp8/decodeframe.c new file mode 100644 index 0000000000..8c6b1ef91f --- /dev/null +++ b/src/gallium/auxiliary/vl/vp8/decodeframe.c @@ -0,0 +1,827 @@ +/* + * 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 "reconintra.h" +#include "reconintra4x4.h" +#include "recon.h" +#include "reconinter.h" +#include "dequantize_dispatch.h" +#include "idct_dispatch.h" +#include "detokenize.h" +#include "invtrans.h" +#include "alloccommon.h" +#include "entropymode.h" +#include "dequantize_common.h" +#include "yv12utils.h" +#include "decodemv.h" +#include "treereader.h" + +#include "vp8_decoder.h".h" +#include "vp8_mem.h" + +#include <assert.h> +#include <stdio.h> + +#define RTCD_VTABLE(x) NULL + +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) + { + if (xd->mb_segement_abs_delta == SEGMENT_ABSDATA) + { + /* Abs Value */ + QIndex = xd->segment_feature_data[MB_LVL_ALT_Q][mbmi->segment_id]; + } + else + { + /* Delta Value */ + 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]; +} + +/** + * 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 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. + */ +static void clamp_mv_to_umv_border(MV *mv, const MACROBLOCKD *xd) +{ + 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); +} + +/** + * \note clamp_uvmv_to_umv_border() is a chroma block MVs version of the + * function clamp_mv_to_umv_border(). + */ +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); + } +} + +static int get_delta_q(BOOL_DECODER *bd, int prev, int *q_update) +{ + int ret_val = 0; + + if (vp8_read_bit(bd)) + { + ret_val = vp8_read_literal(bd, 4); + + if (vp8_read_bit(bd)) + 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; +} + +/** + * \note The extension is only for the last row, for intra prediction purpose. + */ +static void vp8_extend_mb_row(YV12_BUFFER_CONFIG *ybf, + unsigned char *YPtr, + unsigned char *UPtr, + unsigned char *VPtr) +{ + int i; + + YPtr += ybf->y_stride * 14; + UPtr += ybf->uv_stride * 6; + VPtr += ybf->uv_stride * 6; + + for (i = 0; i < 4; i++) + { + YPtr[i] = YPtr[-1]; + UPtr[i] = UPtr[-1]; + VPtr[i] = VPtr[-1]; + } + + YPtr += ybf->y_stride; + UPtr += ybf->uv_stride; + VPtr += ybf->uv_stride; + + for (i = 0; i < 4; i++) + { + YPtr[i] = YPtr[-1]; + UPtr[i] = UPtr[-1]; + VPtr[i] = VPtr[-1]; + } +} + +static void decode_macroblock(VP8D_COMP *pbi, MACROBLOCKD *xd, unsigned int mb_idx) +{ + int eobtotal = 0; + MB_PREDICTION_MODE mode; + int i; + + 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 (xd->mode_info_context->mbmi.need_to_clamp_mvs) + { + clamp_mvs(xd); + } + + mode = xd->mode_info_context->mbmi.mode; + + if (eobtotal == 0 && mode != B_PRED && mode != SPLITMV) + { + /* 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; + } + + if (xd->segmentation_enabled) + mb_init_dequantizer(pbi, xd); + + /* do prediction */ + if (xd->mode_info_context->mbmi.ref_frame == INTRA_FRAME) + { + 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); + } + else + { + vp8_intra_prediction_down_copy(xd); + } + } + else + { + vp8_build_inter_predictors_mb(xd); + } + + /* dequantization and idct */ + if (mode == B_PRED) + { + for (i = 0; i < 16; i++) + { + BLOCKD *b = &xd->block[i]; + RECON_INVOKE(RTCD_VTABLE(recon), intra4x4_predict) + (b, b->bmi.as_mode, b->predictor); + + 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]; + + 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, + xd->predictor, xd->dst.y_buffer, + xd->dst.y_stride, xd->eobs, xd->block[24].diff); + } + + 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 void +decode_macroblock_row(VP8D_COMP *pbi, VP8_COMMON *pc, int mb_row, MACROBLOCKD *xd) +{ + 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; + + 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++) + { + /* 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_left_edge = -((mb_col * 16) << 3); + xd->mb_to_right_edge = ((pc->mb_cols - 1 - mb_col) * 16) << 3; + + update_blockd_bmi(xd); + + 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; + + if (xd->mode_info_context->mbmi.ref_frame != INTRA_FRAME) + { + /* Propagate errors from reference frames */ + xd->corrupted |= pc->yv12_fb[ref_fb_idx].corrupted; + } + + vp8_build_uvmvs(xd, pc->full_pixel); + + 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_bd); + + recon_yoffset += 16; + recon_uvoffset += 8; + + ++xd->mode_info_context; /* next mb */ + + xd->above_context++; + } + + /* 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); + + /* Skip prediction column */ + ++xd->mode_info_context; +} + +static unsigned int token_decoder_readpartitionsize(const unsigned char *cx_size) +{ + const unsigned int size = cx_size[0] + (cx_size[1] << 8) + (cx_size[2] << 16); + return size; +} + +static void token_decoder_setup(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->data + pbi->data_size; + + /* Set up pointers to the first partition */ + BOOL_DECODER *bool_decoder = &pbi->bd2; + const unsigned char *partition = cx_data; + + /* Parse number of token partitions to use */ + const TOKEN_PARTITION multi_token_partition = (TOKEN_PARTITION)vp8_read_literal(&pbi->bd, 2); + + /* Only update the multi_token_partition field if we are sure the value is correct. */ + if (!vp8dx_bool_error(&pbi->bd)) + pc->multi_token_partition = multi_token_partition; + + num_part = 1 << pc->multi_token_partition; + + if (num_part > 1) + { + CHECK_MEM_ERROR(pbi->mbd, vpx_malloc(num_part * sizeof(BOOL_DECODER))); + bool_decoder = pbi->mbd; + partition += 3 * (num_part - 1); + } + + for (i = 0; i < num_part; i++) + { + const unsigned char *partition_size_ptr = cx_data + i * 3; + ptrdiff_t partition_size; + + /* Calculate the length of this partition. The last partition size is implicit. */ + if (i < num_part - 1) + { + partition_size = token_decoder_readpartitionsize(partition_size_ptr); + } + else + { + partition_size = user_data_end - partition; + } + + if (partition + partition_size > user_data_end || + partition + partition_size < partition) + { + vpx_internal_error(&pc->error, VPX_CODEC_CORRUPT_FRAME, + "Truncated packet or corrupt partition " + "%d length", i + 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", i + 1); + } + + /* Advance to the next partition */ + partition += partition_size; + bool_decoder++; + } +} + +static void token_decoder_stop(VP8D_COMP *pbi) +{ + VP8_COMMON *pc = &pbi->common; + + if (pc->multi_token_partition != ONE_PARTITION) + { + vpx_free(pbi->mbd); + pbi->mbd = NULL; + } +} + +static void vp8_frame_init(VP8D_COMP *pbi) +{ + VP8_COMMON *const pc = &pbi->common; + MACROBLOCKD *const xd = &pbi->mb; + + if (pc->frame_type == KEY_FRAME) + { + /* Various keyframe initializations. */ + 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). */ + 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. */ + memset(xd->ref_lf_deltas, 0, sizeof(xd->ref_lf_deltas)); + 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 = BILINEAR; + xd->filter_predict4x4 = FILTER_INVOKE(RTCD_VTABLE(filter), bilinear4x4); + xd->filter_predict8x4 = FILTER_INVOKE(RTCD_VTABLE(filter), bilinear8x4); + xd->filter_predict8x8 = FILTER_INVOKE(RTCD_VTABLE(filter), bilinear8x8); + xd->filter_predict16x16 = FILTER_INVOKE(RTCD_VTABLE(filter), bilinear16x16); + } + else + { + pc->mcomp_filter_type = SIXTAP; + xd->filter_predict4x4 = FILTER_INVOKE(RTCD_VTABLE(filter), sixtap4x4); + xd->filter_predict8x4 = FILTER_INVOKE(RTCD_VTABLE(filter), sixtap8x4); + xd->filter_predict8x8 = FILTER_INVOKE(RTCD_VTABLE(filter), sixtap8x8); + xd->filter_predict16x16 = FILTER_INVOKE(RTCD_VTABLE(filter), sixtap16x16); + } + } + + 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 */ +} + +int vp8_frame_decode(VP8D_COMP *pbi, struct pipe_vp8_picture_desc *frame_header) +{ + BOOL_DECODER *const bd = &pbi->bd; + VP8_COMMON *const pc = &pbi->common; + MACROBLOCKD *const xd = &pbi->mb; + const unsigned char *data = pbi->data; + const unsigned char *data_end = data + pbi->data_size; + ptrdiff_t first_partition_length_in_bytes = (ptrdiff_t)frame_header->first_partition_size; + + int mb_row; + int i, j, k, l; + + /* Start with no corruption of current frame */ + xd->corrupted = 0; + pc->yv12_fb[pc->new_fb_idx].corrupted = 0; + + pc->frame_type = (FRAME_TYPE)frame_header->key_frame; + pc->version = (int)frame_header->base.profile; + pc->show_frame = (int)frame_header->show_frame; + + vp8_setup_version(pc); + + if (pc->frame_type == KEY_FRAME) + { + if (pc->width != frame_header->width || + pc->height != frame_header->height) + { + if (vp8_alloc_frame_buffers(pc, frame_header->width, frame_header->height)) + { + vpx_internal_error(&pc->error, VPX_CODEC_MEM_ERROR, + "Failed to allocate frame buffers"); + } + } + + pc->width = frame_header->width; + pc->horiz_scale = frame_header->horizontal_scale; + pc->height = frame_header->height; + pc->vert_scale = frame_header->vertical_scale; + } + + vp8_frame_init(pbi); + + if (vp8dx_start_decode(bd, 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(bd); + pc->clamp_type = (CLAMP_TYPE)vp8_read_bit(bd); + } + + /* Is segmentation enabled */ + xd->segmentation_enabled = (unsigned char)vp8_read_bit(bd); + + 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(bd); + xd->update_mb_segmentation_data = (unsigned char)vp8_read_bit(bd); + + if (xd->update_mb_segmentation_data) + { + xd->mb_segement_abs_delta = (unsigned char)vp8_read_bit(bd); + + 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(bd)) + { + xd->segment_feature_data[i][j] = (signed char)vp8_read_literal(bd, vp8_mb_feature_data_bits[i]); + + if (vp8_read_bit(bd)) + 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 */ + 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(bd)) + xd->mb_segment_tree_probs[i] = (vp8_prob)vp8_read_literal(bd, 8); + } + } + } + + /* Read the loop filter level and type */ + pc->filter_type = (LOOPFILTER_TYPE)vp8_read_bit(bd); + pc->filter_level = vp8_read_literal(bd, 6); + pc->sharpness_level = vp8_read_literal(bd, 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(bd); + + 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(bd); + + if (xd->mode_ref_lf_delta_update) + { + /* Send update */ + for (i = 0; i < MAX_REF_LF_DELTAS; i++) + { + if (vp8_read_bit(bd)) + { + xd->ref_lf_deltas[i] = (signed char)vp8_read_literal(bd, 6); + + /* Apply sign */ + if (vp8_read_bit(bd)) + 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(bd)) + { + xd->mode_lf_deltas[i] = (signed char)vp8_read_literal(bd, 6); + + /* Apply sign */ + if (vp8_read_bit(bd)) + xd->mode_lf_deltas[i] = xd->mode_lf_deltas[i] * -1; + } + } + } + } + + token_decoder_setup(pbi, data + first_partition_length_in_bytes); + xd->current_bd = &pbi->bd2; + + /* Read the default quantizers. */ + { + int Q = vp8_read_literal(bd, 7); /* AC 1st order Q = default */ + int q_update = 0; + + pc->base_qindex = Q; + pc->y1dc_delta_q = get_delta_q(bd, pc->y1dc_delta_q, &q_update); + pc->y2dc_delta_q = get_delta_q(bd, pc->y2dc_delta_q, &q_update); + pc->y2ac_delta_q = get_delta_q(bd, pc->y2ac_delta_q, &q_update); + pc->uvdc_delta_q = get_delta_q(bd, pc->uvdc_delta_q, &q_update); + pc->uvac_delta_q = get_delta_q(bd, pc->uvac_delta_q, &q_update); + + if (q_update) + vp8_initialize_dequantizer(&pbi->common); + + /* 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(bd); + pc->refresh_alt_ref_frame = vp8_read_bit(bd); + + /* Buffer to buffer copy flags. */ + pc->copy_buffer_to_gf = 0; + pc->copy_buffer_to_arf = 0; + + if (!pc->refresh_golden_frame) + pc->copy_buffer_to_gf = vp8_read_literal(bd, 2); + + if (!pc->refresh_alt_ref_frame) + pc->copy_buffer_to_arf = vp8_read_literal(bd, 2); + + pc->ref_frame_sign_bias[GOLDEN_FRAME] = vp8_read_bit(bd); + pc->ref_frame_sign_bias[ALTREF_FRAME] = vp8_read_bit(bd); + } + + pc->refresh_entropy_probs = vp8_read_bit(bd); + if (pc->refresh_entropy_probs == 0) + { + memcpy(&pc->lfc, &pc->fc, sizeof(pc->fc)); + } + + pc->refresh_last_frame = (pc->frame_type == KEY_FRAME || vp8_read_bit(bd)); + + /* 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 < ENTROPY_NODES; l++) + { + vp8_prob *const p = pc->fc.coef_probs[i][j][k] + l; + + if (vp8_read(bd, vp8_coef_update_probs[i][j][k][l])) + { + *p = (vp8_prob)vp8_read_literal(bd, 8); + } + } + + memcpy(&xd->pre, &pc->yv12_fb[pc->lst_fb_idx], sizeof(YV12_BUFFER_CONFIG)); + 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_setup_block_doffsets(xd); + + /* clear out the coeff buffer */ + memset(xd->qcoeff, 0, sizeof(xd->qcoeff)); + + /* Read the mb_no_coeff_skip flag */ + pc->mb_no_coeff_skip = vp8_read_bit(bd); + + vp8_decode_mode_mvs(pbi); + + memset(pc->above_context, 0, sizeof(ENTROPY_CONTEXT_PLANES) * pc->mb_cols); + + { + 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_bd = &pbi->mbd[ibc]; + ibc++; + + if (ibc == num_part) + ibc = 0; + } + + decode_macroblock_row(pbi, pc, mb_row, xd); + } + } + + token_decoder_stop(pbi); + + /* Collect information about decoder corruption. */ + /* 1. Check first boolean decoder for errors. */ + pc->yv12_fb[pc->new_fb_idx].corrupted = vp8dx_bool_error(bd); + + /* 2. Check the macroblock information */ + pc->yv12_fb[pc->new_fb_idx].corrupted |= xd->corrupted; + + /* printf("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) + { + memcpy(&pc->fc, &pc->lfc, sizeof(pc->fc)); + } + + return 0; +} |