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Diffstat (limited to '')
| -rw-r--r-- | third_party/aom/av1/encoder/encodemb.c | 866 |
1 files changed, 866 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/encodemb.c b/third_party/aom/av1/encoder/encodemb.c new file mode 100644 index 0000000000..c78761dd98 --- /dev/null +++ b/third_party/aom/av1/encoder/encodemb.c @@ -0,0 +1,866 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include "config/aom_config.h" +#include "config/av1_rtcd.h" +#include "config/aom_dsp_rtcd.h" + +#include "aom_dsp/bitwriter.h" +#include "aom_dsp/quantize.h" +#include "aom_mem/aom_mem.h" +#include "aom_ports/mem.h" + +#if CONFIG_BITSTREAM_DEBUG || CONFIG_MISMATCH_DEBUG +#include "aom_util/debug_util.h" +#endif // CONFIG_BITSTREAM_DEBUG || CONFIG_MISMATCH_DEBUG + +#include "av1/common/cfl.h" +#include "av1/common/idct.h" +#include "av1/common/reconinter.h" +#include "av1/common/reconintra.h" +#include "av1/common/scan.h" + +#include "av1/encoder/av1_quantize.h" +#include "av1/encoder/encodemb.h" +#include "av1/encoder/hybrid_fwd_txfm.h" +#include "av1/encoder/txb_rdopt.h" +#include "av1/encoder/rd.h" +#include "av1/encoder/rdopt.h" + +void av1_subtract_block(BitDepthInfo bd_info, int rows, int cols, int16_t *diff, + ptrdiff_t diff_stride, const uint8_t *src8, + ptrdiff_t src_stride, const uint8_t *pred8, + ptrdiff_t pred_stride) { + assert(rows >= 4 && cols >= 4); +#if CONFIG_AV1_HIGHBITDEPTH + if (bd_info.use_highbitdepth_buf) { + aom_highbd_subtract_block(rows, cols, diff, diff_stride, src8, src_stride, + pred8, pred_stride); + return; + } +#endif + (void)bd_info; + aom_subtract_block(rows, cols, diff, diff_stride, src8, src_stride, pred8, + pred_stride); +} + +void av1_subtract_txb(MACROBLOCK *x, int plane, BLOCK_SIZE plane_bsize, + int blk_col, int blk_row, TX_SIZE tx_size) { + MACROBLOCKD *const xd = &x->e_mbd; + const BitDepthInfo bd_info = get_bit_depth_info(xd); + struct macroblock_plane *const p = &x->plane[plane]; + const struct macroblockd_plane *const pd = &x->e_mbd.plane[plane]; + const int diff_stride = block_size_wide[plane_bsize]; + const int src_stride = p->src.stride; + const int dst_stride = pd->dst.stride; + const int tx1d_width = tx_size_wide[tx_size]; + const int tx1d_height = tx_size_high[tx_size]; + uint8_t *dst = &pd->dst.buf[(blk_row * dst_stride + blk_col) << MI_SIZE_LOG2]; + uint8_t *src = &p->src.buf[(blk_row * src_stride + blk_col) << MI_SIZE_LOG2]; + int16_t *src_diff = + &p->src_diff[(blk_row * diff_stride + blk_col) << MI_SIZE_LOG2]; + av1_subtract_block(bd_info, tx1d_height, tx1d_width, src_diff, diff_stride, + src, src_stride, dst, dst_stride); +} + +void av1_subtract_plane(MACROBLOCK *x, BLOCK_SIZE plane_bsize, int plane) { + struct macroblock_plane *const p = &x->plane[plane]; + const struct macroblockd_plane *const pd = &x->e_mbd.plane[plane]; + assert(plane_bsize < BLOCK_SIZES_ALL); + const int bw = block_size_wide[plane_bsize]; + const int bh = block_size_high[plane_bsize]; + const MACROBLOCKD *xd = &x->e_mbd; + const BitDepthInfo bd_info = get_bit_depth_info(xd); + + av1_subtract_block(bd_info, bh, bw, p->src_diff, bw, p->src.buf, + p->src.stride, pd->dst.buf, pd->dst.stride); +} + +int av1_optimize_b(const struct AV1_COMP *cpi, MACROBLOCK *x, int plane, + int block, TX_SIZE tx_size, TX_TYPE tx_type, + const TXB_CTX *const txb_ctx, int *rate_cost) { + MACROBLOCKD *const xd = &x->e_mbd; + struct macroblock_plane *const p = &x->plane[plane]; + const int eob = p->eobs[block]; + const int segment_id = xd->mi[0]->segment_id; + + if (eob == 0 || !cpi->optimize_seg_arr[segment_id] || + xd->lossless[segment_id]) { + *rate_cost = av1_cost_skip_txb(&x->coeff_costs, txb_ctx, plane, tx_size); + return eob; + } + + return av1_optimize_txb(cpi, x, plane, block, tx_size, tx_type, txb_ctx, + rate_cost, cpi->oxcf.algo_cfg.sharpness); +} + +// Hyper-parameters for dropout optimization, based on following logics. +// TODO(yjshen): These settings are tuned by experiments. They may still be +// optimized for better performance. +// (1) Coefficients which are large enough will ALWAYS be kept. +const tran_low_t DROPOUT_COEFF_MAX = 2; // Max dropout-able coefficient. +// (2) Continuous coefficients will ALWAYS be kept. Here rigorous continuity is +// NOT required. For example, `5 0 0 0 7` is treated as two continuous +// coefficients if three zeros do not fulfill the dropout condition. +const int DROPOUT_CONTINUITY_MAX = 2; // Max dropout-able continuous coeff. +// (3) Dropout operation is NOT applicable to blocks with large or small +// quantization index. +const int DROPOUT_Q_MAX = 128; +const int DROPOUT_Q_MIN = 16; +// (4) Recall that dropout optimization will forcibly set some quantized +// coefficients to zero. The key logic on determining whether a coefficient +// should be dropped is to check the number of continuous zeros before AND +// after this coefficient. The exact number of zeros for judgement depends +// on block size and quantization index. More concretely, block size +// determines the base number of zeros, while quantization index determines +// the multiplier. Intuitively, larger block requires more zeros and larger +// quantization index also requires more zeros (more information is lost +// when using larger quantization index). +const int DROPOUT_BEFORE_BASE_MAX = 32; // Max base number for leading zeros. +const int DROPOUT_BEFORE_BASE_MIN = 16; // Min base number for leading zeros. +const int DROPOUT_AFTER_BASE_MAX = 32; // Max base number for trailing zeros. +const int DROPOUT_AFTER_BASE_MIN = 16; // Min base number for trailing zeros. +const int DROPOUT_MULTIPLIER_MAX = 8; // Max multiplier on number of zeros. +const int DROPOUT_MULTIPLIER_MIN = 2; // Min multiplier on number of zeros. +const int DROPOUT_MULTIPLIER_Q_BASE = 32; // Base Q to compute multiplier. + +void av1_dropout_qcoeff(MACROBLOCK *mb, int plane, int block, TX_SIZE tx_size, + TX_TYPE tx_type, int qindex) { + const int tx_width = tx_size_wide[tx_size]; + const int tx_height = tx_size_high[tx_size]; + + // Early return if `qindex` is out of range. + if (qindex > DROPOUT_Q_MAX || qindex < DROPOUT_Q_MIN) { + return; + } + + // Compute number of zeros used for dropout judgement. + const int base_size = AOMMAX(tx_width, tx_height); + const int multiplier = CLIP(qindex / DROPOUT_MULTIPLIER_Q_BASE, + DROPOUT_MULTIPLIER_MIN, DROPOUT_MULTIPLIER_MAX); + const int dropout_num_before = + multiplier * + CLIP(base_size, DROPOUT_BEFORE_BASE_MIN, DROPOUT_BEFORE_BASE_MAX); + const int dropout_num_after = + multiplier * + CLIP(base_size, DROPOUT_AFTER_BASE_MIN, DROPOUT_AFTER_BASE_MAX); + + av1_dropout_qcoeff_num(mb, plane, block, tx_size, tx_type, dropout_num_before, + dropout_num_after); +} + +void av1_dropout_qcoeff_num(MACROBLOCK *mb, int plane, int block, + TX_SIZE tx_size, TX_TYPE tx_type, + int dropout_num_before, int dropout_num_after) { + const struct macroblock_plane *const p = &mb->plane[plane]; + tran_low_t *const qcoeff = p->qcoeff + BLOCK_OFFSET(block); + tran_low_t *const dqcoeff = p->dqcoeff + BLOCK_OFFSET(block); + const int max_eob = av1_get_max_eob(tx_size); + const SCAN_ORDER *const scan_order = get_scan(tx_size, tx_type); + + // Early return if there are not enough non-zero coefficients. + if (p->eobs[block] == 0 || p->eobs[block] <= dropout_num_before || + max_eob <= dropout_num_before + dropout_num_after) { + return; + } + + int count_zeros_before = 0; + int count_zeros_after = 0; + int count_nonzeros = 0; + // Index of the first non-zero coefficient after sufficient number of + // continuous zeros. If equals to `-1`, it means number of leading zeros + // hasn't reach `dropout_num_before`. + int idx = -1; + int eob = 0; // New end of block. + + for (int i = 0; i < p->eobs[block]; ++i) { + const int scan_idx = scan_order->scan[i]; + if (abs(qcoeff[scan_idx]) > DROPOUT_COEFF_MAX) { + // Keep large coefficients. + count_zeros_before = 0; + count_zeros_after = 0; + idx = -1; + eob = i + 1; + } else if (qcoeff[scan_idx] == 0) { // Count zeros. + if (idx == -1) { + ++count_zeros_before; + } else { + ++count_zeros_after; + } + } else { // Count non-zeros. + if (count_zeros_before >= dropout_num_before) { + idx = (idx == -1) ? i : idx; + ++count_nonzeros; + } else { + count_zeros_before = 0; + eob = i + 1; + } + } + + // Handle continuity. + if (count_nonzeros > DROPOUT_CONTINUITY_MAX) { + count_zeros_before = 0; + count_zeros_after = 0; + count_nonzeros = 0; + idx = -1; + eob = i + 1; + } + + // Handle the trailing zeros after original end of block. + if (idx != -1 && i == p->eobs[block] - 1) { + count_zeros_after += (max_eob - p->eobs[block]); + } + + // Set redundant coefficients to zeros if needed. + if (count_zeros_after >= dropout_num_after) { + for (int j = idx; j <= i; ++j) { + qcoeff[scan_order->scan[j]] = 0; + dqcoeff[scan_order->scan[j]] = 0; + } + count_zeros_before += (i - idx + 1); + count_zeros_after = 0; + count_nonzeros = 0; + } else if (i == p->eobs[block] - 1) { + eob = i + 1; + } + } + + if (eob != p->eobs[block]) { + p->eobs[block] = eob; + p->txb_entropy_ctx[block] = + av1_get_txb_entropy_context(qcoeff, scan_order, eob); + } +} + +// Settings for optimization type. NOTE: To set optimization type for all intra +// frames, both `KEY_BLOCK_OPT_TYPE` and `INTRA_BLOCK_OPT_TYPE` should be set. +// TODO(yjshen): These settings are hard-coded and look okay for now. They +// should be made configurable later. +// Blocks of key frames ONLY. +const OPT_TYPE KEY_BLOCK_OPT_TYPE = TRELLIS_DROPOUT_OPT; +// Blocks of intra frames (key frames EXCLUSIVE). +const OPT_TYPE INTRA_BLOCK_OPT_TYPE = TRELLIS_DROPOUT_OPT; +// Blocks of inter frames. (NOTE: Dropout optimization is DISABLED by default +// if trellis optimization is on for inter frames.) +const OPT_TYPE INTER_BLOCK_OPT_TYPE = TRELLIS_DROPOUT_OPT; + +enum { + QUANT_FUNC_LOWBD = 0, + QUANT_FUNC_HIGHBD = 1, + QUANT_FUNC_TYPES = 2 +} UENUM1BYTE(QUANT_FUNC); + +#if CONFIG_AV1_HIGHBITDEPTH +static AV1_QUANT_FACADE + quant_func_list[AV1_XFORM_QUANT_TYPES][QUANT_FUNC_TYPES] = { + { av1_quantize_fp_facade, av1_highbd_quantize_fp_facade }, + { av1_quantize_b_facade, av1_highbd_quantize_b_facade }, + { av1_quantize_dc_facade, av1_highbd_quantize_dc_facade }, + { NULL, NULL } + }; +#else +static AV1_QUANT_FACADE quant_func_list[AV1_XFORM_QUANT_TYPES] = { + av1_quantize_fp_facade, av1_quantize_b_facade, av1_quantize_dc_facade, NULL +}; +#endif + +// Computes the transform for DC only blocks +void av1_xform_dc_only(MACROBLOCK *x, int plane, int block, + TxfmParam *txfm_param, int64_t per_px_mean) { + assert(per_px_mean != INT64_MAX); + const struct macroblock_plane *const p = &x->plane[plane]; + const int block_offset = BLOCK_OFFSET(block); + tran_low_t *const coeff = p->coeff + block_offset; + const int n_coeffs = av1_get_max_eob(txfm_param->tx_size); + memset(coeff, 0, sizeof(*coeff) * n_coeffs); + coeff[0] = + (tran_low_t)((per_px_mean * dc_coeff_scale[txfm_param->tx_size]) >> 12); +} + +void av1_xform_quant(MACROBLOCK *x, int plane, int block, int blk_row, + int blk_col, BLOCK_SIZE plane_bsize, TxfmParam *txfm_param, + const QUANT_PARAM *qparam) { + av1_xform(x, plane, block, blk_row, blk_col, plane_bsize, txfm_param); + av1_quant(x, plane, block, txfm_param, qparam); +} + +void av1_xform(MACROBLOCK *x, int plane, int block, int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, TxfmParam *txfm_param) { + const struct macroblock_plane *const p = &x->plane[plane]; + const int block_offset = BLOCK_OFFSET(block); + tran_low_t *const coeff = p->coeff + block_offset; + const int diff_stride = block_size_wide[plane_bsize]; + + const int src_offset = (blk_row * diff_stride + blk_col); + const int16_t *src_diff = &p->src_diff[src_offset << MI_SIZE_LOG2]; + + av1_fwd_txfm(src_diff, coeff, diff_stride, txfm_param); +} + +void av1_quant(MACROBLOCK *x, int plane, int block, TxfmParam *txfm_param, + const QUANT_PARAM *qparam) { + const struct macroblock_plane *const p = &x->plane[plane]; + const SCAN_ORDER *const scan_order = + get_scan(txfm_param->tx_size, txfm_param->tx_type); + const int block_offset = BLOCK_OFFSET(block); + tran_low_t *const coeff = p->coeff + block_offset; + tran_low_t *const qcoeff = p->qcoeff + block_offset; + tran_low_t *const dqcoeff = p->dqcoeff + block_offset; + uint16_t *const eob = &p->eobs[block]; + + if (qparam->xform_quant_idx != AV1_XFORM_QUANT_SKIP_QUANT) { + const int n_coeffs = av1_get_max_eob(txfm_param->tx_size); + if (LIKELY(!x->seg_skip_block)) { +#if CONFIG_AV1_HIGHBITDEPTH + quant_func_list[qparam->xform_quant_idx][txfm_param->is_hbd]( + coeff, n_coeffs, p, qcoeff, dqcoeff, eob, scan_order, qparam); +#else + quant_func_list[qparam->xform_quant_idx]( + coeff, n_coeffs, p, qcoeff, dqcoeff, eob, scan_order, qparam); +#endif + } else { + av1_quantize_skip(n_coeffs, qcoeff, dqcoeff, eob); + } + } + // use_optimize_b is true means av1_optimze_b will be called, + // thus cannot update entropy ctx now (performed in optimize_b) + if (qparam->use_optimize_b) { + p->txb_entropy_ctx[block] = 0; + } else { + p->txb_entropy_ctx[block] = + av1_get_txb_entropy_context(qcoeff, scan_order, *eob); + } +} + +void av1_setup_xform(const AV1_COMMON *cm, MACROBLOCK *x, TX_SIZE tx_size, + TX_TYPE tx_type, TxfmParam *txfm_param) { + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *const mbmi = xd->mi[0]; + + txfm_param->tx_type = tx_type; + txfm_param->tx_size = tx_size; + txfm_param->lossless = xd->lossless[mbmi->segment_id]; + txfm_param->tx_set_type = av1_get_ext_tx_set_type( + tx_size, is_inter_block(mbmi), cm->features.reduced_tx_set_used); + + txfm_param->bd = xd->bd; + txfm_param->is_hbd = is_cur_buf_hbd(xd); +} +void av1_setup_quant(TX_SIZE tx_size, int use_optimize_b, int xform_quant_idx, + int use_quant_b_adapt, QUANT_PARAM *qparam) { + qparam->log_scale = av1_get_tx_scale(tx_size); + qparam->tx_size = tx_size; + + qparam->use_quant_b_adapt = use_quant_b_adapt; + + // TODO(bohanli): optimize_b and quantization idx has relationship, + // but is kind of buried and complicated in different encoding stages. + // Should have a unified function to derive quant_idx, rather than + // determine and pass in the quant_idx + qparam->use_optimize_b = use_optimize_b; + qparam->xform_quant_idx = xform_quant_idx; + + qparam->qmatrix = NULL; + qparam->iqmatrix = NULL; +} +void av1_setup_qmatrix(const CommonQuantParams *quant_params, + const MACROBLOCKD *xd, int plane, TX_SIZE tx_size, + TX_TYPE tx_type, QUANT_PARAM *qparam) { + qparam->qmatrix = av1_get_qmatrix(quant_params, xd, plane, tx_size, tx_type); + qparam->iqmatrix = + av1_get_iqmatrix(quant_params, xd, plane, tx_size, tx_type); +} + +static void encode_block(int plane, int block, int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, TX_SIZE tx_size, void *arg, + RUN_TYPE dry_run) { + (void)dry_run; + struct encode_b_args *const args = arg; + const AV1_COMP *const cpi = args->cpi; + const AV1_COMMON *const cm = &cpi->common; + MACROBLOCK *const x = args->x; + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *mbmi = xd->mi[0]; + struct macroblock_plane *const p = &x->plane[plane]; + struct macroblockd_plane *const pd = &xd->plane[plane]; + tran_low_t *const dqcoeff = p->dqcoeff + BLOCK_OFFSET(block); + uint8_t *dst; + ENTROPY_CONTEXT *a, *l; + int dummy_rate_cost = 0; + + const int bw = mi_size_wide[plane_bsize]; + dst = &pd->dst.buf[(blk_row * pd->dst.stride + blk_col) << MI_SIZE_LOG2]; + + a = &args->ta[blk_col]; + l = &args->tl[blk_row]; + + TX_TYPE tx_type = DCT_DCT; + const int blk_skip_idx = blk_row * bw + blk_col; + if (!is_blk_skip(x->txfm_search_info.blk_skip, plane, blk_skip_idx) && + !mbmi->skip_mode) { + tx_type = av1_get_tx_type(xd, pd->plane_type, blk_row, blk_col, tx_size, + cm->features.reduced_tx_set_used); + TxfmParam txfm_param; + QUANT_PARAM quant_param; + const int use_trellis = is_trellis_used(args->enable_optimize_b, dry_run); + int quant_idx; + if (use_trellis) + quant_idx = AV1_XFORM_QUANT_FP; + else + quant_idx = + USE_B_QUANT_NO_TRELLIS ? AV1_XFORM_QUANT_B : AV1_XFORM_QUANT_FP; + av1_setup_xform(cm, x, tx_size, tx_type, &txfm_param); + av1_setup_quant(tx_size, use_trellis, quant_idx, + cpi->oxcf.q_cfg.quant_b_adapt, &quant_param); + av1_setup_qmatrix(&cm->quant_params, xd, plane, tx_size, tx_type, + &quant_param); + av1_xform_quant(x, plane, block, blk_row, blk_col, plane_bsize, &txfm_param, + &quant_param); + + // Whether trellis or dropout optimization is required for inter frames. + const bool do_trellis = INTER_BLOCK_OPT_TYPE == TRELLIS_OPT || + INTER_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT; + const bool do_dropout = INTER_BLOCK_OPT_TYPE == DROPOUT_OPT || + INTER_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT; + + if (quant_param.use_optimize_b && do_trellis) { + TXB_CTX txb_ctx; + get_txb_ctx(plane_bsize, tx_size, plane, a, l, &txb_ctx); + av1_optimize_b(args->cpi, x, plane, block, tx_size, tx_type, &txb_ctx, + &dummy_rate_cost); + } + if (!quant_param.use_optimize_b && do_dropout) { + av1_dropout_qcoeff(x, plane, block, tx_size, tx_type, + cm->quant_params.base_qindex); + } + } else { + p->eobs[block] = 0; + p->txb_entropy_ctx[block] = 0; + } + + av1_set_txb_context(x, plane, block, tx_size, a, l); + + if (p->eobs[block]) { + // As long as any YUV plane has non-zero quantized transform coefficients, + // mbmi->skip_txfm flag is set to 0. + mbmi->skip_txfm = 0; + av1_inverse_transform_block(xd, dqcoeff, plane, tx_type, tx_size, dst, + pd->dst.stride, p->eobs[block], + cm->features.reduced_tx_set_used); + } else { + // Only when YUV planes all have zero quantized transform coefficients, + // mbmi->skip_txfm flag is set to 1. + mbmi->skip_txfm &= 1; + } + + // TODO(debargha, jingning): Temporarily disable txk_type check for eob=0 + // case. It is possible that certain collision in hash index would cause + // the assertion failure. To further optimize the rate-distortion + // performance, we need to re-visit this part and enable this assert + // again. + if (p->eobs[block] == 0 && plane == 0) { +#if 0 + if (args->cpi->oxcf.q_cfg.aq_mode == NO_AQ && + args->cpi->oxcf.q_cfg.deltaq_mode == NO_DELTA_Q) { + // TODO(jingning,angiebird,huisu@google.com): enable txk_check when + // enable_optimize_b is true to detect potential RD bug. + const uint8_t disable_txk_check = args->enable_optimize_b; + if (!disable_txk_check) { + assert(xd->tx_type_map[blk_row * xd->tx_type_map_stride + blk_col)] == + DCT_DCT); + } + } +#endif + update_txk_array(xd, blk_row, blk_col, tx_size, DCT_DCT); + } + +#if CONFIG_MISMATCH_DEBUG + if (dry_run == OUTPUT_ENABLED) { + int pixel_c, pixel_r; + BLOCK_SIZE bsize = txsize_to_bsize[tx_size]; + int blk_w = block_size_wide[bsize]; + int blk_h = block_size_high[bsize]; + mi_to_pixel_loc(&pixel_c, &pixel_r, xd->mi_col, xd->mi_row, blk_col, + blk_row, pd->subsampling_x, pd->subsampling_y); + mismatch_record_block_tx(dst, pd->dst.stride, cm->current_frame.order_hint, + plane, pixel_c, pixel_r, blk_w, blk_h, + xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH); + } +#endif +} + +static void encode_block_inter(int plane, int block, int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, TX_SIZE tx_size, + void *arg, RUN_TYPE dry_run) { + struct encode_b_args *const args = arg; + MACROBLOCK *const x = args->x; + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *const mbmi = xd->mi[0]; + const struct macroblockd_plane *const pd = &xd->plane[plane]; + const int max_blocks_high = max_block_high(xd, plane_bsize, plane); + const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane); + + if (blk_row >= max_blocks_high || blk_col >= max_blocks_wide) return; + + const TX_SIZE plane_tx_size = + plane ? av1_get_max_uv_txsize(mbmi->bsize, pd->subsampling_x, + pd->subsampling_y) + : mbmi->inter_tx_size[av1_get_txb_size_index(plane_bsize, blk_row, + blk_col)]; + if (!plane) { + assert(tx_size_wide[tx_size] >= tx_size_wide[plane_tx_size] && + tx_size_high[tx_size] >= tx_size_high[plane_tx_size]); + } + + if (tx_size == plane_tx_size || plane) { + encode_block(plane, block, blk_row, blk_col, plane_bsize, tx_size, arg, + dry_run); + } else { + assert(tx_size < TX_SIZES_ALL); + const TX_SIZE sub_txs = sub_tx_size_map[tx_size]; + assert(IMPLIES(tx_size <= TX_4X4, sub_txs == tx_size)); + assert(IMPLIES(tx_size > TX_4X4, sub_txs < tx_size)); + // This is the square transform block partition entry point. + const int bsw = tx_size_wide_unit[sub_txs]; + const int bsh = tx_size_high_unit[sub_txs]; + const int step = bsh * bsw; + const int row_end = + AOMMIN(tx_size_high_unit[tx_size], max_blocks_high - blk_row); + const int col_end = + AOMMIN(tx_size_wide_unit[tx_size], max_blocks_wide - blk_col); + assert(bsw > 0 && bsh > 0); + + for (int row = 0; row < row_end; row += bsh) { + const int offsetr = blk_row + row; + for (int col = 0; col < col_end; col += bsw) { + const int offsetc = blk_col + col; + + encode_block_inter(plane, block, offsetr, offsetc, plane_bsize, sub_txs, + arg, dry_run); + block += step; + } + } + } +} + +void av1_foreach_transformed_block_in_plane( + const MACROBLOCKD *const xd, BLOCK_SIZE plane_bsize, int plane, + foreach_transformed_block_visitor visit, void *arg) { + const struct macroblockd_plane *const pd = &xd->plane[plane]; + // block and transform sizes, in number of 4x4 blocks log 2 ("*_b") + // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8 + // transform size varies per plane, look it up in a common way. + const TX_SIZE tx_size = av1_get_tx_size(plane, xd); + const BLOCK_SIZE tx_bsize = txsize_to_bsize[tx_size]; + // Call visit() directly with zero offsets if the current block size is the + // same as the transform block size. + if (plane_bsize == tx_bsize) { + visit(plane, 0, 0, 0, plane_bsize, tx_size, arg); + return; + } + const uint8_t txw_unit = tx_size_wide_unit[tx_size]; + const uint8_t txh_unit = tx_size_high_unit[tx_size]; + const int step = txw_unit * txh_unit; + + // If mb_to_right_edge is < 0 we are in a situation in which + // the current block size extends into the UMV and we won't + // visit the sub blocks that are wholly within the UMV. + const int max_blocks_wide = max_block_wide(xd, plane_bsize, plane); + const int max_blocks_high = max_block_high(xd, plane_bsize, plane); + const BLOCK_SIZE max_unit_bsize = + get_plane_block_size(BLOCK_64X64, pd->subsampling_x, pd->subsampling_y); + const int mu_blocks_wide = + AOMMIN(mi_size_wide[max_unit_bsize], max_blocks_wide); + const int mu_blocks_high = + AOMMIN(mi_size_high[max_unit_bsize], max_blocks_high); + + // Keep track of the row and column of the blocks we use so that we know + // if we are in the unrestricted motion border. + int i = 0; + for (int r = 0; r < max_blocks_high; r += mu_blocks_high) { + const int unit_height = AOMMIN(mu_blocks_high + r, max_blocks_high); + // Skip visiting the sub blocks that are wholly within the UMV. + for (int c = 0; c < max_blocks_wide; c += mu_blocks_wide) { + const int unit_width = AOMMIN(mu_blocks_wide + c, max_blocks_wide); + for (int blk_row = r; blk_row < unit_height; blk_row += txh_unit) { + for (int blk_col = c; blk_col < unit_width; blk_col += txw_unit) { + visit(plane, i, blk_row, blk_col, plane_bsize, tx_size, arg); + i += step; + } + } + } + } + // Check if visit() is invoked at least once. + assert(i >= 1); +} + +typedef struct encode_block_pass1_args { + AV1_COMP *cpi; + MACROBLOCK *x; +} encode_block_pass1_args; + +static void encode_block_pass1(int plane, int block, int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, TX_SIZE tx_size, + void *arg) { + encode_block_pass1_args *args = (encode_block_pass1_args *)arg; + AV1_COMP *cpi = args->cpi; + AV1_COMMON *cm = &cpi->common; + MACROBLOCK *const x = args->x; + MACROBLOCKD *const xd = &x->e_mbd; + struct macroblock_plane *const p = &x->plane[plane]; + struct macroblockd_plane *const pd = &xd->plane[plane]; + tran_low_t *const dqcoeff = p->dqcoeff + BLOCK_OFFSET(block); + + uint8_t *dst; + dst = &pd->dst.buf[(blk_row * pd->dst.stride + blk_col) << MI_SIZE_LOG2]; + + TxfmParam txfm_param; + QUANT_PARAM quant_param; + + av1_setup_xform(cm, x, tx_size, DCT_DCT, &txfm_param); + av1_setup_quant(tx_size, 0, AV1_XFORM_QUANT_B, cpi->oxcf.q_cfg.quant_b_adapt, + &quant_param); + av1_setup_qmatrix(&cm->quant_params, xd, plane, tx_size, DCT_DCT, + &quant_param); + + av1_xform_quant(x, plane, block, blk_row, blk_col, plane_bsize, &txfm_param, + &quant_param); + + if (p->eobs[block] > 0) { + txfm_param.eob = p->eobs[block]; + if (txfm_param.is_hbd) { + av1_highbd_inv_txfm_add(dqcoeff, dst, pd->dst.stride, &txfm_param); + return; + } + av1_inv_txfm_add(dqcoeff, dst, pd->dst.stride, &txfm_param); + } +} + +void av1_encode_sby_pass1(AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize) { + encode_block_pass1_args args = { cpi, x }; + av1_subtract_plane(x, bsize, 0); + av1_foreach_transformed_block_in_plane(&x->e_mbd, bsize, 0, + encode_block_pass1, &args); +} + +void av1_encode_sb(const struct AV1_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bsize, + RUN_TYPE dry_run) { + assert(bsize < BLOCK_SIZES_ALL); + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *mbmi = xd->mi[0]; + // In the current encoder implementation, for inter blocks, + // only when YUV planes all have zero quantized transform coefficients, + // mbmi->skip_txfm flag is set to 1. + // For intra blocks, this flag is set to 0 since skipped blocks are so rare + // that transmitting skip_txfm = 1 is very expensive. + // mbmi->skip_txfm is init to 1, and will be modified in encode_block() based + // on transform, quantization, and (if exists) trellis optimization. + mbmi->skip_txfm = 1; + if (x->txfm_search_info.skip_txfm) return; + + struct optimize_ctx ctx; + struct encode_b_args arg = { + cpi, x, &ctx, NULL, NULL, dry_run, cpi->optimize_seg_arr[mbmi->segment_id] + }; + const AV1_COMMON *const cm = &cpi->common; + const int num_planes = av1_num_planes(cm); + for (int plane = 0; plane < num_planes; ++plane) { + const struct macroblockd_plane *const pd = &xd->plane[plane]; + const int subsampling_x = pd->subsampling_x; + const int subsampling_y = pd->subsampling_y; + if (plane && !xd->is_chroma_ref) break; + const BLOCK_SIZE plane_bsize = + get_plane_block_size(bsize, subsampling_x, subsampling_y); + assert(plane_bsize < BLOCK_SIZES_ALL); + const int mi_width = mi_size_wide[plane_bsize]; + const int mi_height = mi_size_high[plane_bsize]; + const TX_SIZE max_tx_size = get_vartx_max_txsize(xd, plane_bsize, plane); + const BLOCK_SIZE txb_size = txsize_to_bsize[max_tx_size]; + const int bw = mi_size_wide[txb_size]; + const int bh = mi_size_high[txb_size]; + int block = 0; + const int step = + tx_size_wide_unit[max_tx_size] * tx_size_high_unit[max_tx_size]; + av1_get_entropy_contexts(plane_bsize, pd, ctx.ta[plane], ctx.tl[plane]); + av1_subtract_plane(x, plane_bsize, plane); + arg.ta = ctx.ta[plane]; + arg.tl = ctx.tl[plane]; + const BLOCK_SIZE max_unit_bsize = + get_plane_block_size(BLOCK_64X64, subsampling_x, subsampling_y); + int mu_blocks_wide = mi_size_wide[max_unit_bsize]; + int mu_blocks_high = mi_size_high[max_unit_bsize]; + mu_blocks_wide = AOMMIN(mi_width, mu_blocks_wide); + mu_blocks_high = AOMMIN(mi_height, mu_blocks_high); + + for (int idy = 0; idy < mi_height; idy += mu_blocks_high) { + for (int idx = 0; idx < mi_width; idx += mu_blocks_wide) { + int blk_row, blk_col; + const int unit_height = AOMMIN(mu_blocks_high + idy, mi_height); + const int unit_width = AOMMIN(mu_blocks_wide + idx, mi_width); + for (blk_row = idy; blk_row < unit_height; blk_row += bh) { + for (blk_col = idx; blk_col < unit_width; blk_col += bw) { + encode_block_inter(plane, block, blk_row, blk_col, plane_bsize, + max_tx_size, &arg, dry_run); + block += step; + } + } + } + } + } +} + +static void encode_block_intra_and_set_context(int plane, int block, + int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, + TX_SIZE tx_size, void *arg) { + av1_encode_block_intra(plane, block, blk_row, blk_col, plane_bsize, tx_size, + arg); + + struct encode_b_args *const args = arg; + MACROBLOCK *x = args->x; + ENTROPY_CONTEXT *a = &args->ta[blk_col]; + ENTROPY_CONTEXT *l = &args->tl[blk_row]; + av1_set_txb_context(x, plane, block, tx_size, a, l); +} + +void av1_encode_block_intra(int plane, int block, int blk_row, int blk_col, + BLOCK_SIZE plane_bsize, TX_SIZE tx_size, + void *arg) { + struct encode_b_args *const args = arg; + const AV1_COMP *const cpi = args->cpi; + const AV1_COMMON *const cm = &cpi->common; + MACROBLOCK *const x = args->x; + MACROBLOCKD *const xd = &x->e_mbd; + MB_MODE_INFO *mbmi = xd->mi[0]; + struct macroblock_plane *const p = &x->plane[plane]; + struct macroblockd_plane *const pd = &xd->plane[plane]; + tran_low_t *dqcoeff = p->dqcoeff + BLOCK_OFFSET(block); + PLANE_TYPE plane_type = get_plane_type(plane); + uint16_t *eob = &p->eobs[block]; + const int dst_stride = pd->dst.stride; + uint8_t *dst = &pd->dst.buf[(blk_row * dst_stride + blk_col) << MI_SIZE_LOG2]; + int dummy_rate_cost = 0; + + av1_predict_intra_block_facade(cm, xd, plane, blk_col, blk_row, tx_size); + + TX_TYPE tx_type = DCT_DCT; + const int bw = mi_size_wide[plane_bsize]; + if (plane == 0 && is_blk_skip(x->txfm_search_info.blk_skip, plane, + blk_row * bw + blk_col)) { + *eob = 0; + p->txb_entropy_ctx[block] = 0; + } else { + av1_subtract_txb(x, plane, plane_bsize, blk_col, blk_row, tx_size); + + const ENTROPY_CONTEXT *a = &args->ta[blk_col]; + const ENTROPY_CONTEXT *l = &args->tl[blk_row]; + tx_type = av1_get_tx_type(xd, plane_type, blk_row, blk_col, tx_size, + cm->features.reduced_tx_set_used); + TxfmParam txfm_param; + QUANT_PARAM quant_param; + const int use_trellis = + is_trellis_used(args->enable_optimize_b, args->dry_run); + int quant_idx; + if (use_trellis) + quant_idx = AV1_XFORM_QUANT_FP; + else + quant_idx = + USE_B_QUANT_NO_TRELLIS ? AV1_XFORM_QUANT_B : AV1_XFORM_QUANT_FP; + + av1_setup_xform(cm, x, tx_size, tx_type, &txfm_param); + av1_setup_quant(tx_size, use_trellis, quant_idx, + cpi->oxcf.q_cfg.quant_b_adapt, &quant_param); + av1_setup_qmatrix(&cm->quant_params, xd, plane, tx_size, tx_type, + &quant_param); + + av1_xform_quant(x, plane, block, blk_row, blk_col, plane_bsize, &txfm_param, + &quant_param); + + // Whether trellis or dropout optimization is required for key frames and + // intra frames. + const bool do_trellis = (frame_is_intra_only(cm) && + (KEY_BLOCK_OPT_TYPE == TRELLIS_OPT || + KEY_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT)) || + (!frame_is_intra_only(cm) && + (INTRA_BLOCK_OPT_TYPE == TRELLIS_OPT || + INTRA_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT)); + const bool do_dropout = (frame_is_intra_only(cm) && + (KEY_BLOCK_OPT_TYPE == DROPOUT_OPT || + KEY_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT)) || + (!frame_is_intra_only(cm) && + (INTRA_BLOCK_OPT_TYPE == DROPOUT_OPT || + INTRA_BLOCK_OPT_TYPE == TRELLIS_DROPOUT_OPT)); + + if (quant_param.use_optimize_b && do_trellis) { + TXB_CTX txb_ctx; + get_txb_ctx(plane_bsize, tx_size, plane, a, l, &txb_ctx); + av1_optimize_b(args->cpi, x, plane, block, tx_size, tx_type, &txb_ctx, + &dummy_rate_cost); + } + if (do_dropout) { + av1_dropout_qcoeff(x, plane, block, tx_size, tx_type, + cm->quant_params.base_qindex); + } + } + + if (*eob) { + av1_inverse_transform_block(xd, dqcoeff, plane, tx_type, tx_size, dst, + dst_stride, *eob, + cm->features.reduced_tx_set_used); + } + + // TODO(jingning): Temporarily disable txk_type check for eob=0 case. + // It is possible that certain collision in hash index would cause + // the assertion failure. To further optimize the rate-distortion + // performance, we need to re-visit this part and enable this assert + // again. + if (*eob == 0 && plane == 0) { +#if 0 + if (args->cpi->oxcf.q_cfg.aq_mode == NO_AQ + && args->cpi->oxcf.q_cfg.deltaq_mode == NO_DELTA_Q) { + assert(xd->tx_type_map[blk_row * xd->tx_type_map_stride + blk_col)] == + DCT_DCT); + } +#endif + update_txk_array(xd, blk_row, blk_col, tx_size, DCT_DCT); + } + + // For intra mode, skipped blocks are so rare that transmitting + // skip_txfm = 1 is very expensive. + mbmi->skip_txfm = 0; + + if (plane == AOM_PLANE_Y && xd->cfl.store_y) { + cfl_store_tx(xd, blk_row, blk_col, tx_size, plane_bsize); + } +} + +void av1_encode_intra_block_plane(const struct AV1_COMP *cpi, MACROBLOCK *x, + BLOCK_SIZE bsize, int plane, RUN_TYPE dry_run, + TRELLIS_OPT_TYPE enable_optimize_b) { + assert(bsize < BLOCK_SIZES_ALL); + const MACROBLOCKD *const xd = &x->e_mbd; + if (plane && !xd->is_chroma_ref) return; + + const struct macroblockd_plane *const pd = &xd->plane[plane]; + const int ss_x = pd->subsampling_x; + const int ss_y = pd->subsampling_y; + ENTROPY_CONTEXT ta[MAX_MIB_SIZE] = { 0 }; + ENTROPY_CONTEXT tl[MAX_MIB_SIZE] = { 0 }; + struct encode_b_args arg = { + cpi, x, NULL, ta, tl, dry_run, enable_optimize_b + }; + const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, ss_x, ss_y); + if (enable_optimize_b) { + av1_get_entropy_contexts(plane_bsize, pd, ta, tl); + } + av1_foreach_transformed_block_in_plane( + xd, plane_bsize, plane, encode_block_intra_and_set_context, &arg); +} |